阅读说明：本技术 测试控制系统及方法 (Test control system and method ) 是由 张淞珲 王毓琦 郭腾炫 刘涛 杨剑 于 2019-12-09 设计创作，主要内容包括：本发明提供一种测试控制系统及方法,通过设置互感器负荷箱以提供设定的有效负载,利用互感器校验仪采集被测互感器及标准互感器的输出数据,根据输出数据得到测试数据,并利用无线通信单元将测试数据发送至便携式终端设备。便携式终端设备可根据接收到的测试数据生成对应的测试报告。如此,可实现对被测互感器的有效检测,且互感器检测仪和便携式终端设备之间通过无线通信单元通信,可实现数据的实时、稳定传输,不受现场设备分散限制,可及时生成测试报告、提供测试结果反馈。(The invention provides a test control system and a method, which are characterized in that a transformer load box is arranged to provide a set effective load, a transformer calibrator is used for collecting output data of a tested transformer and a standard transformer, test data are obtained according to the output data, and a wireless communication unit is used for sending the test data to portable terminal equipment. The portable terminal device can generate a corresponding test report according to the received test data. Therefore, effective detection of the tested mutual inductor can be realized, the mutual inductor detector and the portable terminal device are communicated through the wireless communication unit, real-time and stable transmission of data can be realized, the detection is not limited by field devices in a dispersed manner, and a test report can be generated in time and test result feedback can be provided.)

1. A test control system is used for testing a tested mutual inductor and is characterized by comprising a mutual inductor calibrator, a standard mutual inductor, a mutual inductor load box, a wireless communication unit and portable terminal equipment;

the mutual inductor calibrator is respectively connected with the tested mutual inductor, the standard mutual inductor and the mutual inductor load box, the mutual inductor calibrator is connected with the portable terminal equipment through the wireless communication unit, and the tested mutual inductor is connected with the mutual inductor load box;

the transformer load box is used for providing a set effective load under the control of the transformer calibrator;

the transformer calibrator is used for acquiring output data of the tested transformer and the standard transformer, analyzing and processing the output data to obtain test data, and sending the test data to the portable terminal equipment through the wireless communication unit;

and the portable terminal equipment is used for generating a corresponding test report according to the test data when receiving the test data.

2. The test control system of claim 1, wherein the transformer calibrator comprises a case and a control panel disposed on the case, the control panel having a plurality of terminals, the terminals being configured to connect the tested transformer and the standard transformer.

3. The test control system of claim 2, wherein a display screen is further disposed on the control panel, and a central processing unit is disposed inside the case;

the control panel is provided with a groove, the display screen is arranged in the groove and used for displaying operation elements, detecting control operation and receiving input test parameters, and obtaining a corresponding control instruction according to the control operation and the test parameters;

the central processing unit is used for acquiring output data of the tested mutual inductor and the standard mutual inductor according to the control instruction, analyzing and processing the output data to obtain test data, and sending the test data to the portable terminal equipment through the wireless communication unit.

4. The test control system according to claim 3, wherein the display screen and the portable terminal device can perform synchronous display of test data.

5. The test control system of claim 3, wherein the central processing unit comprises a data acquisition module and a central processor;

the data acquisition module is used for acquiring output data of the tested mutual inductor and the standard mutual inductor and transmitting the output data to the central processing unit;

the central processing unit is used for analyzing and processing the output data to obtain test data.

6. The test control system of claim 5, wherein the central processing unit further comprises an acquisition protection module and a data conversion module;

the acquisition protection module is connected between the data acquisition module and the central processing unit and is used for performing overcurrent protection, short-circuit protection and voltage isolation protection;

the data conversion module is connected with the data acquisition module and is used for carrying out analog-to-digital conversion on the acquired output data.

7. The test control system of claim 2, wherein the control panel is further provided with a communication transmission interface and a USB interface, and the communication transmission interface comprises a wireless transmission interface, a wired transmission interface and a serial communication interface.

8. The test control system of claim 7, wherein the mutual inductor calibrator further comprises an internal memory, the internal memory can store the test data in the memory, and when the mutual inductor calibrator is externally connected with a USB memory, the internal memory can send the test data and the test interface in the picture format to the USB memory for storage.

9. The test control system of claim 2, wherein the control panel is further provided with a power display and control unit, the chassis is internally provided with a power module, and the power display and control unit is connected with the power module.

10. The test control system of claim 9, wherein the power display control unit comprises a charging display lamp, a power switch and a charging interface;

the charging display lamp is used for displaying the electric quantity of the power supply module and the charging state of the power supply module; the power switch is used for switching on or off a power supply;

the charging interface is used for connecting an external power supply device to charge the power module.

11. The test control system of claim 1, wherein the transformer load box comprises a plurality of gears, and when a tested transformer is tested, the corresponding gear is selected on the transformer calibrator according to the parameter of the tested transformer, so that the transformer load box provides a corresponding effective load.

12. The test control system according to claim 1, wherein information on a standard transformer used, information on a delivery unit of the test item, and user information are input to the portable terminal device at the time of the test, and different types of users are grouped, and operation authority of each group of users is set and managed.

13. The test control system according to claim 12, wherein the portable terminal device, after receiving the complete test data, can enter a report printing interface to generate different forms of reports according to different requirements.

14. The test control system of claim 2, wherein the transformer under test comprises a voltage transformer under test, the standard transformer comprises a standard voltage transformer, the test control system further comprises a transformer;

the high-voltage side of the transformer, the primary side of the standard voltage transformer and the primary side of the tested voltage transformer are connected in parallel;

the high end and the low end of the secondary side of the standard voltage transformer are respectively connected with a standard voltage access terminal in the plurality of terminals to form a power supply voltage loop;

and the low end of the secondary side of the standard voltage transformer and the low end of the secondary side of the measured voltage transformer are respectively connected with a differential pressure input terminal and a differential pressure output terminal in the plurality of terminals to form a differential voltage measuring loop, or the high end of the secondary side of the standard voltage transformer and the high end of the secondary side of the measured voltage transformer are respectively connected with a differential pressure input terminal and a differential pressure output terminal in the plurality of terminals to form a differential voltage measuring loop.

15. The test control system of claim 2, wherein the measured transformer comprises a measured current transformer, the standard transformer comprises a standard current transformer, the measured current transformer comprises a test winding and a test winding, the standard current transformer comprises a primary winding and a secondary winding, and the test control system further comprises a current booster;

the polarity end of the test winding is connected with the polarity end of the primary winding, and the non-polarity end of the test winding and the non-polarity end of the primary winding are respectively connected with the output end of the current booster;

the polarity end of the test winding and the polarity end of the secondary winding are connected to the differential branch signal inflow end in the plurality of wiring ends;

a non-polar end of the secondary winding is connected to a secondary standard terminal of the plurality of terminals;

and the non-polar end of the test winding is connected to a secondary tested terminal in the plurality of terminals after passing through the transformer load box.

16. A test control method for testing a mutual inductor under test, for operating the test control system of any one of claims 1 to 15, the test control system comprising a mutual inductor checker, a standard mutual inductor, a mutual inductor load box, a wireless communication unit, and a portable terminal device, the method comprising:

the transformer calibrator controls the transformer load box to output a set effective load;

the transformer calibrator collects output data of the tested transformer and the standard transformer, analyzes and processes the output data to obtain test data, and sends the test data to the portable terminal equipment through the wireless communication unit;

and the portable terminal equipment receives the test data and generates a corresponding test report according to the test data.

Technical Field

The present disclosure relates to the field of testing technologies, and in particular, to a test control system and method.

Background

The high-voltage electric energy metering device of the power plant and the transformer substation belongs to fixed installation type equipment, and the metering accuracy of the high-voltage electric energy metering device is related to the aspects of power generation, power transmission, power supply, user benefits and the like. In order to ensure the accuracy of the metering, the metering needs to be checked regularly according to relevant standards. The field error detection of the mutual inductor has high working strength and complex operation, and the traditional manual data recording workload is high. And the existing inspection equipment and the processing terminal adopt a wired connection mode for data transmission, and the transmission is inconvenient and the stability is poor due to the dispersion of field equipment.

Disclosure of Invention

It is therefore an objective of the claimed invention to provide a test control system and method to improve the above-mentioned problems.

The invention provides a test control system, which is used for testing a tested mutual inductor and comprises a mutual inductor calibrator, a standard mutual inductor, a mutual inductor load box, a wireless communication unit and portable terminal equipment;

the mutual inductor calibrator is respectively connected with the tested mutual inductor, the standard mutual inductor and the mutual inductor load box, the mutual inductor calibrator is connected with the portable terminal equipment through the wireless communication unit, and the tested mutual inductor is connected with the mutual inductor load box;

the transformer load box is used for providing a set effective load under the control of the transformer calibrator;

the transformer calibrator is used for acquiring output data of the tested transformer and the standard transformer, analyzing and processing the output data to obtain test data, and sending the test data to the portable terminal equipment through the wireless communication unit;

and the portable terminal equipment is used for generating a corresponding test report according to the test data when receiving the test data.

Optionally, the transformer calibrator comprises a case and a control panel arranged on the case, wherein the control panel is provided with a plurality of wiring terminals, and the wiring terminals are used for connecting the tested transformer and the standard transformer.

Optionally, a display screen is further disposed on the control panel, and a central processing unit is disposed inside the case;

the control panel is provided with a groove, the display screen is arranged in the groove and used for displaying operation elements, detecting control operation and receiving input test parameters, and obtaining a corresponding control instruction according to the control operation and the test parameters;

the central processing unit is used for acquiring output data of the tested mutual inductor and the standard mutual inductor according to the control instruction, analyzing and processing the output data to obtain test data, and sending the test data to the portable terminal equipment through the wireless communication unit.

Optionally, the display screen and the portable terminal device may perform synchronous display of the test data.

Optionally, the central processing unit includes a data acquisition module and a central processor;

the data acquisition module is used for acquiring output data of the tested mutual inductor and the standard mutual inductor and transmitting the output data to the central processing unit;

the central processing unit is used for analyzing and processing the output data to obtain test data.

Optionally, the central processing unit further includes an acquisition protection module and a data conversion module;

the acquisition protection module is connected between the data acquisition module and the central processing unit and is used for performing overcurrent protection, short-circuit protection and voltage isolation protection;

the data conversion module is connected with the data acquisition module and is used for carrying out analog-to-digital conversion on the acquired output data.

Optionally, the control panel is further provided with a communication transmission interface and a USB interface, and the communication transmission interface includes a wireless transmission interface, a wired transmission interface, and a serial communication interface.

Optionally, the mutual inductor calibrator further includes an internal memory, the test data may be stored in the memory, and when the mutual inductor calibrator is externally connected to the USB memory, the internal memory may send the test data and the test interface in the picture format to the USB memory for storage.

Optionally, a power display and control unit is further arranged on the control panel, a power module is arranged in the case, and the power display and control unit is connected with the power module.

Optionally, the power supply display and control unit comprises a charging display lamp, a power supply switch and a charging interface;

the charging display lamp is used for displaying the electric quantity of the power supply module and the charging state of the power supply module; the power switch is used for switching on or off a power supply;

the charging interface is used for connecting an external power supply device to charge the power module.

Optionally, the transformer load box includes a plurality of gears, and when a tested transformer is tested, a corresponding gear is selected on the transformer calibrator according to the size of the parameter of the tested transformer, so that the transformer load box provides a corresponding effective load.

Optionally, when testing, inputting information of the adopted standard mutual inductor, information of the submission unit of the test item, and user information into the portable terminal device, grouping different types of users, and setting and managing the operation authority of each group of users.

Optionally, after receiving the complete test data, the portable terminal device may enter a report printing interface to generate reports of different forms according to different requirements.

Optionally, the tested transformer comprises a tested voltage transformer, the standard transformer comprises a standard voltage transformer, and the test control system further comprises a transformer;

the high-voltage side of the transformer, the primary side of the standard voltage transformer and the primary side of the tested voltage transformer are connected in parallel;

the high end and the low end of the secondary side of the standard voltage transformer are respectively connected with a standard voltage access terminal in the plurality of terminals to form a power supply voltage loop;

and the low end of the secondary side of the standard voltage transformer and the low end of the secondary side of the measured voltage transformer are respectively connected with a differential pressure input terminal and a differential pressure output terminal in the plurality of terminals to form a differential voltage measuring loop, or the high end of the secondary side of the standard voltage transformer and the high end of the secondary side of the measured voltage transformer are respectively connected with a differential pressure input terminal and a differential pressure output terminal in the plurality of terminals to form a differential voltage measuring loop.

Optionally, the measured transformer includes a measured current transformer, the standard transformer includes a standard current transformer, the measured current transformer includes a test winding and a test winding, the standard current transformer includes a primary winding and a secondary winding, and the test control system further includes a current booster;

the polarity end of the test winding is connected with the polarity end of the primary winding, and the non-polarity end of the test winding and the non-polarity end of the primary winding are respectively connected with the output end of the current booster;

the polarity end of the test winding and the polarity end of the secondary winding are connected to the differential branch signal inflow end in the plurality of wiring ends;

a non-polar end of the secondary winding is connected to a secondary standard terminal of the plurality of terminals;

and the non-polar end of the test winding is connected to a secondary tested terminal in the plurality of terminals after passing through the transformer load box.

The invention also provides a test control method, which is used for testing the tested mutual inductor and is applied to the test control system, wherein the test control system comprises a mutual inductor calibrator, a standard mutual inductor, a mutual inductor load box, a wireless communication unit and portable terminal equipment, and the method comprises the following steps:

the transformer calibrator controls the transformer load box to output a set effective load;

the transformer calibrator collects output data of the tested transformer and the standard transformer, analyzes and processes the output data to obtain test data, and sends the test data to the portable terminal equipment through the wireless communication unit;

and the portable terminal equipment receives the test data and generates a corresponding test report according to the test data.

According to the test control system and method provided by the invention, the transformer load box is arranged to provide the set effective load, the transformer calibrator is used for collecting the output data of the tested transformer and the standard transformer, the test data is obtained according to the output data, and the wireless communication unit is used for sending the test data to the portable terminal equipment. The portable terminal device can generate a corresponding test report according to the received test data. Therefore, effective detection of the tested mutual inductor can be realized, the mutual inductor detector and the portable terminal device are communicated through the wireless communication unit, real-time and stable transmission of data can be realized, the detection is not limited by field devices in a dispersed manner, and a test report can be generated in time and test result feedback can be provided.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a block diagram of a test control system according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a control panel provided in an embodiment of the present application.

Fig. 3 is one of verification wiring diagrams of the measured voltage transformer provided by the embodiment of the application.

Fig. 4 is a second verification wiring diagram of the measured voltage transformer provided in the embodiment of the present application.

Fig. 5 is one of verification wiring diagrams of the current transformer to be tested according to the embodiment of the application.

Fig. 6 is a second verification wiring diagram of the current transformer to be tested according to the embodiment of the present application.

Fig. 7 is a flowchart of a test control method according to an embodiment of the present application.

Icon: 1-testing a control system; 10-a tested transformer; 101-measured voltage transformer; 102-a current transformer under test; 20-a transformer calibrator; 200-a control panel; 201-display screen; 202-terminal; 203-communication transmission interface; 204-USB interface; 205-charging display lamp; 206-power switch; 207-charging interface; 30-standard mutual inductor; 301-standard voltage transformer; 302-standard current transformer; 40-a transformer load box; 50-a wireless communication unit; 60-portable terminal device; 70-transformer.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Referring to fig. 1, an embodiment of the present application provides a test control system 1, where the test control system 1 may be used to test a transformer 10 under test. The test control system 1 includes a transformer checker 20, a standard transformer 30, a transformer load box 40, a wireless communication unit 50, and a portable terminal device 60.

The mutual inductor calibrator 20 is respectively connected with the measured mutual inductor 10, the standard mutual inductor 30 and the mutual inductor load box 40, the mutual inductor calibrator 20 is connected with the portable terminal device 60 through the wireless communication unit 50, and the measured mutual inductor 10 is further connected with the mutual inductor load box 40.

The transformer load box 40 may provide a set payload under control of the transformer verifier 20. Optionally, the transformer load box 40 includes a plurality of gears, and in implementation, a corresponding gear may be selected on the transformer calibrator 20 according to the size of the parameter of the measured transformer 10, so that the transformer load box 40 provides a corresponding payload.

The transformer calibrator 20 may collect output data of the measured transformer 10 and the standard transformer 30, analyze the collected output data to obtain test data, and transmit the test data to the portable terminal device 60 through the wireless communication unit 50. The portable terminal device 60 may generate a corresponding test report based on the test data after receiving the test data. Alternatively, the portable terminal device 60 may include, but is not limited to, a notebook computer, a tablet computer, a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), and other mobile terminal devices.

Through the arrangement, effective detection on the tested mutual inductor 10 can be realized, data transmission is carried out in a wireless transmission mode, the limitation of a geographical range is avoided, test data can be checked in real time at the portable terminal device 60, and functions of storing the data, generating a corresponding test report and the like can be carried out.

Referring to fig. 2, in the present embodiment, the transformer calibrator 20 includes a casing (not shown) and a control panel 200 disposed on the casing. The control panel 200 may be a metal panel, or a panel made of other durable materials. The case can be made of an engineering plastic mold, has the performances of shock resistance, pressure resistance and the like, and guarantees the safety of field operators and equipment.

A display screen 201 is arranged on the control panel 200, and a central processing unit is arranged inside the case. Optionally, a groove, for example, a groove with a rectangular, square or other cross-sectional shape, is formed on the control panel 200. Display screen 201 can set up in the recess, so, can avoid display screen 201 protrusion in control panel 200's surface, the appearance is not too pleasing to the eye for one time, and the second time causes inconvenience when carrying out equipment and accomodate, and causes wearing and tearing to display screen 201 easily.

In this embodiment, the display screen 201 may be a liquid crystal display screen and has a touch function, for example, the display screen 201 may adopt a 800 × 480 high-resolution, 7 ″ liquid crystal display screen. The display screen 201 may display operation elements, such as test items to be performed, for example, "voltage transformer", "current transformer", "load measurement", "data browsing", "parameter setting", and the like, for the user to select. The display screen 201 can detect the control operation of the user on the operation elements on the display screen 201 and receive the test parameters input by the user, such as the transformer parameters set by the user for performing the transformer error test, including the type, range, accuracy level, capacity, power factor, etc. of the transformer. The display screen 201 can obtain a corresponding control instruction according to the control operation and the received test parameters, and send the control instruction to the central processing unit.

Optionally, the touch function of the display screen 201 may be directly utilized to implement parameter equipment, control operation, and the like, or an external keyboard, a mouse, and other input equipment may also be adopted, so that the external keyboard, the mouse, and the like are utilized to implement selection of operation elements, setting of parameters, and the like on the display screen 201, and this embodiment is not particularly limited.

The central processing unit may collect output data of the tested transformer 10 and the standard transformer 30 according to the control instruction, analyze and process the output data to obtain test data, and transmit the test data to the portable terminal device 60 through the wireless communication unit 50. The output data collected by the central processing unit includes voltage values or current values of the tested transformer 10 and the standard transformer 30.

Moreover, the central processing unit can also send the test data to the display screen 201 for display. In this way, the display screen 201 on the transformer calibrator 20 and the portable terminal device 60 can perform synchronous display of test data. Further, since the portable terminal device 60 has more powerful processing functions and larger storage space than the transformer calibrator 20, a corresponding test report may be generated by the portable terminal device 60 based on the received test data, and further data analysis may be performed.

Alternatively, in the present embodiment, information of the standard transformer 30 used, information of the delivery unit of the test item, user information, and the like may be input into the portable terminal device 60, and different types of users may be grouped, and the operation authority of each group of users may be set and managed. After the test data is received, the report printing interface can be entered, the report cover is edited, and the report with the specified format is generated, so that the reports with different forms can be generated according to different requirements.

After the report is generated, the report can be directly connected with a printer for printing or stored. Therefore, test recording personnel can also check the test data in real time at a place far away from the test area.

In this embodiment, a plurality of terminals 202 are further disposed on the control panel 200, and the plurality of terminals 202 can be used for connecting the tested transformer 10 and the standard transformer 30. The plurality of terminals 202 include a secondary standard terminal To and a secondary tested terminal T_xThe differential current branch circuit comprises a standard voltage terminal a/x, a differential current branch circuit signal inflow end K/differential pressure input terminal K, a differential current branch circuit signal outflow end D/differential pressure output terminal D and a grounding terminal.

In this embodiment, the central processing unit includes a data acquisition module and a central processing unit. After the tested transformer 10 and the standard transformer 30 are connected to the corresponding terminals 202, the data acquisition module can acquire output data of the tested transformer 10 and the standard transformer 30 and transmit the output data to the central processing unit. The central processing unit can be used for analyzing and processing the received output data to obtain test data. In this embodiment, the Central processing unit may be an integrated circuit chip, has signal processing capability, and may be a general-purpose Processor including a Central Processing Unit (CPU), a Network Processor (NP), and the like. But may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.

Optionally, the central processing unit further includes an acquisition protection module and a data conversion module, and the acquisition protection module is connected between the data acquisition module and the central processing unit and is used for performing overcurrent protection, short-circuit protection and voltage isolation protection. The data conversion module is connected with the data acquisition module and is used for carrying out analog-to-digital conversion on the acquired output data.

The acquisition protection module can comprise an overcurrent protector, a short-circuit protection circuit and a voltage isolator. The overcurrent protector can be used for realizing current overload protection, and the short-circuit protection circuit is used for protecting short-circuit faults generated by short circuit of devices in the circuit. The voltage isolator can be used for realizing isolation voltage protection, and can realize isolation voltage protection of not less than 5 KV. The overcurrent protector, the short-circuit protection circuit, the voltage isolator, and the like in this embodiment may adopt common devices or circuits in the prior art, and this embodiment is not particularly limited.

In this embodiment, the data conversion module may adopt a high-precision AD conversion chip, or may be an analog processing port of the central processing unit, and performs analog-to-digital conversion on the acquired signal.

In addition, the control panel 200 is further provided with a communication transmission interface 203 and a USB interface 204, wherein the communication transmission interface 203 includes a wireless transmission interface, and the central processing unit can implement a wireless communication function with the portable terminal device 60 through the wireless transmission interface and the wireless communication unit 50. The communication transmission interface 203 further includes a wired transmission interface and a serial communication interface. When the wired connection is needed to be carried out between the external equipment and the external equipment, the connection can be realized through the wire and the wired transmission interface. The serial communication interface can be RS-232, RS-485, RS-422 or the like. The external storage device can access the central processing unit through the USB interface 204, so that the central processing unit can send the related test data to the external storage device for storage, or can convert the test page into a picture format and send the picture format to the external storage device for storage.

In this embodiment, a power display and control unit is further disposed on the control panel 200, and a power module is further disposed in the chassis, and the power display and control unit is connected to the power module. The power module is also connected to other devices in the test control system 1, such as a central processing unit, a data acquisition module, an acquisition protection module, a display screen 201, and the like, so as to provide electric energy for these devices. In this embodiment, the power module may be a high-power lithium battery or a storage battery, and is not limited specifically. The power module can convert an external 220V power supply into a voltage meeting the normal work of each device and chip in the system, and realizes the functions of isolation, filtering, protection and the like of the power supply so as to provide a stable working power supply.

The power display control unit on the control panel 200 includes a charging display lamp 205, a power switch 206 and a charging interface 207. The charging display lamp 205 can be used to display the power and the charging status of the power module, for example, the charging display lamp 205 can display blue when the power module is in an underpower state, red when the power module is in a charging state, or green when the power module is in a full power state.

The power switch 206 is connected to the power module and is configured to turn on or off the power supply, and the charging interface 207 is configured to connect to an external power supply device to charge the power module.

Referring to fig. 3 and fig. 4, in the present embodiment, the transformer calibrator 20 may implement calibration of a voltage transformer, the measured transformer 10 may include a measured voltage transformer 101, and the standard transformer 30 includes a standard current transformer 302. Wherein the test control system 1 further comprises a transformer 70.

The high-voltage side of the transformer 70, the primary side of the standard voltage transformer 301 and the primary side of the measured voltage transformer 101 are connected in parallel. The high side B and the low side B of the secondary side of the standard voltage transformer 301 are connected to the standard voltage terminals a, x of the plurality of terminals 202, respectively, to form a supply voltage loop.

As an embodiment, as shown in fig. 3, when the low-end differential measurement method is adopted, the low end b of the secondary side of the standard voltage transformer 301 and the low end b of the secondary side of the measured voltage transformer 101 are connected to the differential pressure input terminal K and the differential pressure output terminal D of the plurality of terminals 202, respectively, to constitute a differential measurement voltage circuit. As another embodiment, as shown in fig. 4, when the high-side differential measurement method is adopted, the high-side B of the secondary side of the standard voltage transformer 301 and the high-side B of the secondary side of the measured voltage transformer 101 are respectively connected to the differential pressure input terminal K and the differential pressure output terminal D of the plurality of terminals 202 to form a differential measurement voltage circuit.

Based on the above connection manner, the transformer calibrator 20 may obtain test data of the tested voltage transformer 101 according to a difference between the collected output data of the standard voltage transformer 301 and the output data of the tested voltage transformer 101, so as to analyze the tested voltage transformer 101 in the following process.

In addition, referring to fig. 5, the transformer calibrator 20 provided in this embodiment may further implement calibration of a current transformer, where the measured transformer 10 includes a measured current transformer 102, and the standard transformer 30 includes a standard current transformer 302. The tested current transformer 102 includes a test winding and a test winding, the standard current transformer 302 includes a primary winding and a secondary winding, and the test control system 1 further includes a current booster.

Optionally, when the comparison circuit is used for verification, the polarity end of the test winding is connected with the polarity end of the primary winding, and the non-polarity end of the test winding and the non-polarity end of the primary winding are respectively connected with the output end of the current booster.

The polarity end of the test winding and the polarity end of the secondary winding are connected to the differential branch signal inflow end K of the plurality of terminals 202.

The non-polar end of the secondary winding is connected To a secondary standard terminal To of the plurality of terminals 202. The non-polar end of the test winding passes through the transformer load box 40 and is connected to the secondary tested terminal Tx of the plurality of terminals 202.

Through the above connection manner, the transformer calibrator 20 may implement calibration of the measured current transformer 102 according to a difference between the collected output data of the measured current transformer 102 and the collected output data of the standard current transformer 302.

In this embodiment, in addition to the above-mentioned comparison line connection manner, a self-calibration line connection manner may also be adopted to perform calibration on the current transformer 102 to be tested, for example, a connection circuit in fig. 6 is adopted, which is not specifically described in this embodiment.

During the testing process, the transformer load box 40 can be controlled by the transformer calibrator 20 to provide different effective loads, so as to realize the testing at different testing points. Specifically, a user may select an appropriate transformer load box 40 gear on the display screen 201 of the transformer calibrator 20 according to the parameter of the measured current transformer 102 or the measured voltage transformer 101, so as to control the transformer load box 40 to provide a corresponding effective load.

Before detection, parameter setting and information filling are required to be performed on the display screen 201 of the transformer calibrator 20, for example, the display screen 201 may implement a calibration interface of the tested transformer 10, and the interface may include the following information:

station name and line number: the station name of the power station where the tested transformer 10 is located and the number of the line to which the tested transformer belongs.

And (3) grade selection: and selecting the accuracy grade of the tested transformer 10.

Rated voltage/rated current: the rated secondary voltage input of the tested voltage transformer 101 is in a unit of V, the input range is 10-200V/the rated secondary current input of the tested current transformer 102 is in a unit of A, and the input range is 0.1-5A.

Rated load: the rated secondary load of the tested transformer 10 is in VA.

COS Φ: power factor of the secondary load of the transformer 10 under test.

Frequency: power frequency in Hz.

Remeasure the button: the data in the table is reset and a new test is started.

A point taking button: pressing this button transformer verifier 20 will measure and extract data into the protocol test point. The function is generally used as a manual point-taking function set because the working current or rated voltage cannot reach the specification in the actual field verification work.

Rated load/lower limit load: and selecting the secondary load of the tested transformer 10, recording test data under a rated load condition during testing, automatically switching to the lower limit load record after the test is finished, and manually selecting according to actual test requirements.

A save button: storing data displayed on the display screen 201 to an internal memory of the transformer calibrator 20, and inquiring and using the data after power failure; if the USB memory is externally connected, the test page can be stored to the USB memory in a picture format.

An exit button: and returning to the upper menu-tested transformer 10 wiring diagram interface.

In addition, the ratio difference (f), the angle difference (delta), the dial indicator and the secondary voltage/current test data of the tested mutual inductor 10 can be displayed in real time by using a large font on the verification interface. The transformer calibrator 20 can also perform error judgment on the test data according to the accuracy grade of the tested transformer 10, and the out-of-tolerance data is highlighted in red.

Referring to fig. 7, based on the test control system 1, another embodiment of the present application further provides a test control method, which is applied to the test control system 1, and the test control method may include the following steps:

step 710, the transformer calibrator 20 controls the transformer load box 40 to output a set effective load.

Step 720, the transformer calibrator 20 collects output data of the tested transformer 10 and the standard transformer 30, analyzes and processes the output data to obtain test data, and sends the test data to the portable terminal device 60 through the wireless communication unit 50.

Step 730, the portable terminal device 60 receives the test data, and generates a corresponding test report according to the test data.

In specific implementation, the connection between the external measured transformer 10 and the transformer calibrator 20 may be firstly completed according to the verification rules of the corresponding measured voltage transformer 101 or measured current transformer 102 in the above-mentioned connection manner. And selecting a function type on a main interface of a display screen 201 of the transformer calibrator 20 according to the type of the tested transformer 10, for example, when the tested transformer 10 is the tested voltage transformer 101, selecting a 'voltage transformer' on the main interface, and if the tested transformer 10 is the tested current transformer 102, selecting a 'current transformer' on the main interface. After selecting the corresponding function type, the tested transformer 10 enters a calibration interface, and corresponding information such as a station name, a line number, grade selection, rated voltage, COS phi, frequency and the like is input on the interface.

During testing, the transformer calibrator 20 may control the transformer load box 40 to output a set payload. Firstly, the test data of the tested mutual inductor 10 under the rated load condition can be tested, and after the test data is completed, the provided effective load is adjusted to the lower limit load, and the test data of the tested mutual inductor 10 under the lower limit load is tested. When it needs to be explained, other test loads can be set according to actual needs to perform the test in the test process, and the specific limitations are not limited.

During testing, the point-taking button on the calibration interface of the tested transformer 10 can be used for extracting test data to test points specified by a rule, and when the working current or rated voltage cannot reach the specification in field calibration work, the testing is realized in a manual point-taking mode.

The transformer calibrator 20 analyzes and processes the output data of the tested transformer 10 and the standard transformer 30 to obtain test data, on one hand, the transformer calibrator 20 can display the test data on the display screen 201, and on the other hand, the transformer calibrator can synchronously transmit the test data to the portable terminal device 60 through the wireless communication unit 50. The transformer calibrator 20 may also store the test data in an internal memory, and may also be queried and used after a restart due to a power failure. If the transformer calibrator 20 is externally connected with a USB memory, the test data and the test interface in the picture format may be sent to the USB memory for storage.

After receiving the complete test data, the portable terminal device 60 may enter a report printing interface to generate different test reports according to different requirements. And when the report preview is abnormal, abnormal prompt information can be generated for prompting.

After a test round is completed, the retest button on the calibration interface of the tested transformer 10 can be pressed to reset the test data of the test round displayed on the interface for a new test round. Further, an exit button may be pressed to return to the previous level menu, i.e., the wiring diagram interface of the mutual inductor 10 under test, where exit is selected to exit the round of testing.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the method described above may refer to the corresponding process in the foregoing system, and will not be described in too much detail herein.

To sum up, the test control system 1 and the method provided in the embodiment of the present application provide a set effective load by setting the transformer load box 40, collect output data of the tested transformer 10 and the standard transformer 30 by using the transformer calibrator 20, obtain test data according to the output data, and send the test data to the portable terminal device 60 by using the wireless communication unit 50. The portable terminal device 60 may generate a corresponding test report from the received test data. Therefore, the mutual inductor 10 to be tested can be effectively detected, the mutual inductor detector and the portable terminal device 60 are communicated through the wireless communication unit 50, real-time and stable data transmission can be achieved, the dispersion limitation of field devices is avoided, and a test report can be generated in time and test result feedback can be provided.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.