阅读说明：本技术 一种分支开关停复电监测传感器、系统及方法 (Branch switch stop and recovery monitoring sensor, system and method ) 是由 姜静 田博宇 于 2020-12-22 设计创作，主要内容包括：本申请公开了一种分支开关停复电监测传感器、系统及方法,传感器通过信号监测单元监测电压转换单元在分支开关处获取的电压信号,从而判断分支开关是否出现状态变化,当出现状态变化时,则生成报警信号,再将报警信号以及与其对应的预先获取的报警时间和电压信号传输至监测终端,从而实现自动上报分支开关停复电事件,同时,还可以通过存储芯片存储报警信号以及与其对应的预先获取的报警时间和电压信号。同时,本申请实施例的监测传感器结构简单,成本低,安装灵活,不需要额外增加通讯网络,能够及时反馈配电变压器下分支开关回路的停复电情况,为抢修单位在第一时间即可掌握分支开关的跳闸和停电信息。(The sensor monitors a voltage signal acquired by a voltage conversion unit at a branch switch through a signal monitoring unit so as to judge whether the branch switch has a state change or not, and when the state change occurs, an alarm signal is generated and transmitted to a monitoring terminal along with the alarm signal and the pre-acquired alarm time and voltage signal corresponding to the alarm signal, so that the branch switch power-off event can be automatically reported, and meanwhile, the alarm signal and the pre-acquired alarm time and voltage signal corresponding to the alarm signal can be stored through a storage chip. Meanwhile, the monitoring sensor of the embodiment of the application has the advantages of simple structure, low cost and flexible installation, does not need to additionally increase a communication network, can timely feed back the power failure and recovery condition of the branch switch loop under the distribution transformer, and can master the tripping and power failure information of the branch switch in the first time for an emergency maintenance unit.)

1. A branch switch power-off and power-restoration monitoring sensor is characterized by comprising a voltage conversion unit and a signal monitoring unit;

the voltage conversion unit is used for acquiring a voltage signal of the branch switch and transmitting the voltage signal to the signal monitoring unit;

the signal monitoring unit comprises a detection chip and a storage chip;

the detection chip is used for judging whether state change occurs according to the voltage signal, and if so, generating an alarm signal; the monitoring terminal is also used for transmitting the alarm signal, the corresponding pre-acquired alarm time and the voltage signal to a preset monitoring terminal;

the memory chip is used for storing the alarm signal, the pre-acquired alarm time corresponding to the alarm signal and the voltage signal.

2. The branch switch power-off and power-off monitoring sensor according to claim 1, wherein the signal monitoring unit further comprises a real-time clock chip, and is configured to read an alarm time corresponding to the alarm signal after receiving the alarm signal transmitted by the detection chip, and further configured to send the alarm time to the detection chip.

3. The branch switch outage and restoration monitoring sensor according to claim 1, wherein the voltage conversion unit comprises an AC to DC module and a photoelectric isolation circuit;

the input end of the AC-to-DC module is electrically connected with the output end of the branch switch, the output end of the AC-to-DC module is electrically connected with the input end of the photoelectric isolation circuit, and the output end of the photoelectric isolation circuit is electrically connected with the input end of the detection chip.

4. The branch switch outage and restoration monitoring sensor according to claim 3, further comprising a power management module, wherein the power management module comprises a charge and discharge protection circuit, a DC/DC power module and a super capacitor;

the output end of the AC-to-DC conversion module is electrically connected with the input end of the charge-discharge protection circuit, the first output end of the charge-discharge protection circuit is electrically connected with the DC/DC power supply module, the second output end of the charge-discharge protection circuit is electrically connected with the super capacitor, the output end of the super capacitor is electrically connected with the DC/DC power supply module through the charge-discharge protection circuit, and the output end of the DC/DC power supply module is electrically connected with the signal monitoring unit; the super capacitor is used for providing a working power supply for the signal monitoring unit when the signal monitoring unit detects that the voltage signal is 0.

5. The branch switch power failure and restoration monitoring sensor according to claim 1, wherein the signal monitoring unit further comprises a LORA communication module for wirelessly communicating the detection chip with the preset monitoring terminal.

6. The branch switch complex electricity stop monitoring sensor according to claim 1, wherein the detection chip is an STC89C522RC chip.

7. A branch switch power failure and restoration monitoring system is characterized by comprising a sensor module and a monitoring terminal;

the sensor module is a plurality of sensors, and the branch switch stop and recovery monitoring sensors in claim 1 are adopted in the plurality of sensors;

the sensor module is connected to the output end of a branch switch with a preset ID, the preset ID is unique, and the sensor module stores ID information corresponding to the preset ID;

the sensor module is in wireless communication connection with the monitoring terminal and is used for sending alarm information and the ID information corresponding to the branch switch of the preset ID to the monitoring terminal when the state change of the branch switch of the preset ID is monitored;

the alarm information comprises an alarm signal generated by the sensor module and a corresponding pre-acquired alarm time and voltage signal.

8. A branch switch power failure and restoration monitoring method based on the branch switch power failure and restoration monitoring sensor of claim 1, comprising the following steps:

acquiring a voltage signal of a branch switch through a voltage conversion unit, and transmitting the voltage signal to a detection chip;

judging whether state change occurs or not according to the voltage signal through the detection chip, and if so, generating the alarm signal and transmitting the alarm signal, the pre-acquired alarm time corresponding to the alarm signal and the voltage signal to a preset monitoring terminal;

and storing the alarm signal, the corresponding alarm time and the corresponding voltage signal by a storage chip.

9. The branch switch power-off and power-off monitoring method according to claim 8, wherein the branch switch power-off and power-off monitoring sensor comprises a real-time clock chip, and before transmitting the alarm signal, the pre-acquired alarm time and the voltage signal corresponding to the alarm signal to a preset monitoring terminal, the method comprises:

and after receiving the alarm signal transmitted by the detection chip through the real-time clock chip, reading the alarm time corresponding to the alarm signal, and then sending the alarm time to the detection chip.

10. The method for monitoring power failure and restoration of a branch switch according to claim 8, wherein the voltage conversion unit comprises an AC-to-DC module and a photoelectric isolation circuit, and the step of obtaining the voltage signal of the branch switch through the voltage conversion unit and transmitting the voltage signal to the detection chip specifically comprises:

after the AC-DC conversion module collects the AC voltage signal of the branch switch, the AC voltage signal is converted into a DC voltage signal;

and after the photoelectric isolation circuit receives the direct-current voltage signal, the direct-current voltage signal is transmitted to the detection chip.

Technical Field

The application relates to the technical field of sensors, in particular to a branch switch power-off and power-restoration monitoring sensor, system and method.

Background

Along with the continuous development and popularization of the metering automation system, the metering automation system is used in the field of transformers, and the failure emergency repair timeliness rate can be improved by finding the transformer tripping power failure condition in time.

However, when a certain power supply circuit to which the transformer belongs trips, due to the fact that an emergency repair unit is lack of monitoring equipment, power failure information of the branch circuit cannot be mastered in the first time, power failure recovery time is delayed, and customer satisfaction is affected.

Most of the existing monitoring devices are power failure sensors, and common power failure sensors can only reflect the on-off state of a line, cannot store power failure and restoration time and events, and cannot automatically report power failure and restoration events. Meanwhile, the monitoring equipment is additionally connected through a wired line to monitor the state, the installation and wiring are complicated, the power failure and restoration monitoring function depends on the additionally installed monitoring equipment, the investment cost is increased when the monitoring equipment is additionally installed, and the monitoring equipment cannot be directly applied to the existing metering automation system.

Therefore, there is a need to develop a simple sensor capable of monitoring the power failure of each branch circuit.

Disclosure of Invention

The application provides a branch switch power failure and restoration monitoring sensor, a system and a method, which are used for solving the technical problems that the existing power failure and restoration monitoring sensor is complex in structure, cannot store power failure and restoration time and events and cannot automatically report power failure and restoration events.

In view of the above, a first aspect of the present application provides a branch switch power-off and power-back monitoring sensor, which includes a voltage conversion unit and a signal monitoring unit;

the voltage conversion unit is used for acquiring a voltage signal of the branch switch and transmitting the voltage signal to the signal monitoring unit;

the signal monitoring unit comprises a detection chip and a storage chip;

the detection chip is used for judging whether state change occurs according to the voltage signal, and if so, generating an alarm signal; the monitoring terminal is also used for transmitting the alarm signal, the corresponding pre-acquired alarm time and the voltage signal to a preset monitoring terminal;

the memory chip is used for storing the alarm signal, the pre-acquired alarm time corresponding to the alarm signal and the voltage signal.

Preferably, the signal monitoring unit further includes a real-time clock chip, which is configured to receive the alarm signal transmitted by the detection chip, read the alarm time corresponding to the alarm signal, and send the alarm time to the detection chip.

Preferably, the voltage conversion unit comprises an AC-to-DC module and a photoelectric isolation circuit;

the input end of the AC-to-DC module is electrically connected with the output end of the branch switch, the output end of the AC-to-DC module is electrically connected with the input end of the photoelectric isolation circuit, and the output end of the photoelectric isolation circuit is electrically connected with the input end of the detection chip.

Preferably, the power supply further comprises a power supply management module, wherein the power supply management module comprises a charge-discharge protection circuit, a DC/DC power supply module and a super capacitor;

the output end of the AC-to-DC conversion module is electrically connected with the input end of the charge-discharge protection circuit, the first output end of the charge-discharge protection circuit is electrically connected with the DC/DC power supply module, the second output end of the charge-discharge protection circuit is electrically connected with the super capacitor, the output end of the super capacitor is electrically connected with the DC/DC power supply module through the charge-discharge protection circuit, and the output end of the DC/DC power supply module is electrically connected with the signal monitoring unit; the super capacitor is used for providing a working power supply for the signal monitoring unit when the signal monitoring unit detects that the voltage signal is 0.

Preferably, the signal monitoring unit further includes an LORA communication module, which is used for realizing wireless communication connection between the detection chip and the preset monitoring terminal.

Preferably, the detection chip adopts an STC89C522RC chip.

In a second aspect, the application further provides a branch switch power failure and restoration monitoring system, which comprises a sensor module and a monitoring terminal;

the sensor module is a plurality of sensors, and the branch switch stop and recovery monitoring sensors in claim 1 are adopted in the plurality of sensors;

the sensor module is connected to the output end of a branch switch with a preset ID, the preset ID is unique, and the sensor module stores ID information corresponding to the preset ID;

the sensor module is in wireless communication connection with the monitoring terminal and is used for sending alarm information and the ID information corresponding to the branch switch of the preset ID to the monitoring terminal when the state change of the branch switch of the preset ID is monitored;

the alarm information comprises an alarm signal generated by the sensor module and a corresponding pre-acquired alarm time and voltage signal.

In a third aspect, the present application further provides a branch switch power failure and restoration monitoring method, where based on the branch switch power failure and restoration monitoring sensor, the method includes the following steps:

acquiring a voltage signal of a branch switch through a voltage conversion unit, and transmitting the voltage signal to a detection chip;

judging whether state change occurs or not according to the voltage signal through the detection chip, and if so, generating the alarm signal and transmitting the alarm signal, the pre-acquired alarm time corresponding to the alarm signal and the voltage signal to a preset monitoring terminal;

and storing the alarm signal, the corresponding alarm time and the corresponding voltage signal by a storage chip.

Preferably, the branch switch power-off and power-restoration monitoring sensor includes a real-time clock chip, and before transmitting the alarm signal, the pre-acquired alarm time corresponding thereto, and the voltage signal to a preset monitoring terminal, the branch switch power-off and power-restoration monitoring sensor includes:

and after receiving the alarm signal transmitted by the detection chip through the real-time clock chip, reading the alarm time corresponding to the alarm signal, and then sending the alarm time to the detection chip.

Preferably, the voltage conversion unit includes an AC-to-DC module and a photoelectric isolation circuit, and the step of obtaining the voltage signal of the branch switch through the voltage conversion unit and transmitting the voltage signal to the detection chip specifically includes:

after the AC-DC conversion module collects the AC voltage signal of the branch switch, the AC voltage signal is converted into a DC voltage signal;

and after the photoelectric isolation circuit receives the direct-current voltage signal, the direct-current voltage signal is transmitted to the detection chip.

According to the technical scheme, the embodiment of the application has the following advantages:

according to the branch switch power failure and restoration monitoring sensor provided by the embodiment of the application, the voltage signal acquired by the voltage conversion unit at the branch switch is monitored by the signal monitoring unit, so that whether the state change occurs in the branch switch is judged, when the state change occurs, an alarm signal is generated, and then the alarm signal and the corresponding pre-acquired alarm time and voltage signal are transmitted to the monitoring terminal, so that the power failure and restoration event of the branch switch can be automatically reported, and meanwhile, the alarm signal and the corresponding pre-acquired alarm time and voltage signal can be stored by the storage chip. Meanwhile, the monitoring sensor of the embodiment of the application has the advantages of simple structure, low cost and flexible installation, does not need to additionally increase a communication network, can timely feed back the power failure and recovery condition of the branch switch loop under the distribution transformer, and can master the tripping and power failure information of the branch switch in the first time for an emergency maintenance unit.

Drawings

Fig. 1 is a schematic structural diagram of a branch switch power-off/power-back monitoring sensor according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a branch switch power-off/reset monitoring sensor according to another embodiment of the present application;

fig. 3 is a schematic structural diagram of a power management module in a branch switch power-off/power-back monitoring sensor according to another embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a branch switch power failure and restoration monitoring system according to an embodiment of the present disclosure;

fig. 5 is a flowchart of a branch switch power failure and restoration monitoring method according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions of the present application better understood, 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

For easy understanding, please refer to fig. 1, the present application provides a branch switch stop-and-go monitoring sensor, which includes a voltage converting unit 200 and a signal monitoring unit 300;

the voltage conversion unit 200 is configured to obtain a voltage signal of the branch switch 100, and further configured to transmit the voltage signal to the signal monitoring unit 300;

the signal monitoring unit 300 includes a detection chip 301 and a memory chip 302;

the detection chip 301 is used for judging whether state change occurs according to the voltage signal, and if so, generating an alarm signal; the monitoring terminal is further configured to transmit the alarm signal and the corresponding pre-acquired alarm time and voltage signal to the preset monitoring terminal 400;

the memory chip 302 is used for storing the alarm signal and the corresponding pre-acquired alarm time and voltage signal.

In this embodiment, the signal monitoring unit 300 monitors the voltage signal obtained by the voltage conversion unit 200 at the branch switch 100, so as to determine whether the branch switch 100 has a state change, and when the state change occurs, an alarm signal is generated, and the alarm signal, and the pre-obtained alarm time and voltage signal corresponding to the alarm signal are transmitted to the monitoring terminal, so as to automatically report the power failure event of the branch switch 100, and at the same time, the alarm signal, and the pre-obtained alarm time and voltage signal corresponding to the alarm signal can be stored in the memory chip 302.

In addition, the monitoring sensor that this embodiment provided simple structure, with low costs, the installation is nimble, does not need additionally to increase communication network, can in time feed back the power failure condition of answering a telegram in the branch switch return circuit under the distribution transformer, can master the tripping operation and the power failure information of branch switch 100 for salvageing the unit in the very first time.

The above is a detailed description of an embodiment of the branch switch stop/reset monitoring sensor provided in the present invention, and the following is a detailed description of another embodiment of the branch switch stop/reset monitoring sensor provided in the present invention.

For easy understanding, please refer to fig. 2, the present application provides a branch switch stop-and-go monitoring sensor, which includes a voltage converting unit 200 and a signal monitoring unit 300;

the voltage conversion unit 200 is configured to obtain a voltage signal of the branch switch 100, and further configured to transmit the voltage signal to the signal monitoring unit 300;

in the present embodiment, the voltage conversion unit 200 includes an AC-to-DC module 201 and a photoelectric isolation circuit 202; the input end of the AC-to-DC module 201 is electrically connected to the output end of the branch switch 100, the output end of the AC-to-DC module 201 is electrically connected to the input end of the optoelectronic isolation circuit 202, and the output end of the optoelectronic isolation circuit 202 is electrically connected to the input end of the detection chip 301.

It can be understood that, since the branch switch 100 is 380V AC voltage, after the AC to DC module 201 collects an AC voltage signal, the AC voltage signal is converted into a DC voltage signal, and then the DC voltage signal is transmitted to the signal monitoring unit 300 through the photoelectric isolation circuit 202.

The signal monitoring unit 300 comprises a detection chip 301, a real-time clock chip 303, a storage chip 302 and a LORA communication module 304;

the detection chip 301 is used for judging whether state change occurs according to the voltage signal, and if so, generating an alarm signal; the monitoring terminal is further configured to transmit the alarm signal and the corresponding pre-acquired alarm time and voltage signal to the preset monitoring terminal 400;

note that the detection chip 301 in this embodiment is an STC89C522RC chip.

The real-time clock chip 303 is used for receiving the alarm signal transmitted by the detection chip 301, reading the alarm time corresponding to the alarm signal, and sending the alarm time to the detection chip 301;

it should be noted that the real-time clock chip 303 in this embodiment adopts a DS3231 chip.

The memory chip 302 is used for storing the alarm signal and the corresponding pre-acquired alarm time and voltage signal.

It should be noted that the memory chip 302 in the present embodiment is an EEPROM chip, and specifically, an AT24LC64 chip.

The LORA communication module 304 is configured to implement wireless communication connection between the detection chip 301 and the preset monitoring terminal 400.

It should be noted that the monitoring terminal in this embodiment is a router and/or a distribution terminal.

In the present embodiment, the detection chip 301 determines a state change upon receiving the dc voltage signal, and in a general example, the switching states of the branch switch 100 are divided into a power failure state and a power restoration state.

Specifically, when the branch switch 100 trips, the line to which the branch switch belongs has a power failure, the AC-to-DC module 201 has no voltage output, the voltage transmitted to the detection chip 301 by the photoelectric isolation circuit 202 is a low-level voltage signal, the detection chip 301 determines external power failure, and then generates a power failure alarm signal, and reads the corresponding power failure time of the power failure alarm signal from the real-time clock chip 303, so that the power failure alarm signal, the power failure time and the voltage signal can be reported to the monitoring terminal through the LORA communication module 304, and emergency maintenance personnel can monitor power failure fault information at the first time.

Meanwhile, after the branch switch 100 is switched on, the line to which the branch switch belongs is electrified, the voltage signal is subjected to voltage conversion through the AC-to-DC conversion module 201 and then transmitted to the detection chip 301 through the photoelectric isolation circuit 202, when the voltage signal detected by the detection chip 301 is a high-level voltage signal, the line is judged to be powered on again, a power on reset alarm signal is generated, power on reset time corresponding to the power on reset alarm signal is read from the real-time clock chip 303, and therefore the power on reset alarm signal, the power on reset time and the voltage signal can be reported to the monitoring terminal through the LORA communication module 304, and emergency maintenance personnel can monitor power on reset fault information at the first time.

Further, referring to fig. 3, the power failure monitoring sensor further includes a power management module 500, where the power management module 500 includes a charging and discharging protection circuit 502, a DC/DC power module 503, and a super capacitor 501;

the output end of the AC-to-DC conversion module 201 is electrically connected to the input end of the charge-discharge protection circuit 502, the first output end of the charge-discharge protection circuit 502 is electrically connected to the DC/DC power module 503, the second output end of the charge-discharge protection circuit 502 is electrically connected to the super capacitor 501, the output end of the super capacitor 501 is electrically connected to the DC/DC power module 503 through the charge-discharge protection circuit 502, and the output end of the DC/DC power module 503 is electrically connected to the signal monitoring unit 300; the super capacitor is used for providing a working power supply for the signal monitoring unit when the signal monitoring unit detects that the voltage signal is 0.

It should be noted that, when the branch switch 100 trips, the line to which the branch switch belongs is powered off, the AC-to-DC module 201 does not output voltage, the signal monitoring unit detects that the voltage signal is 0, and the branch switch 100 power failure and restoration monitoring sensor can be powered by the super capacitor 501; when the branch switch 100 is switched on, the line to which the branch switch belongs is electrified, the output voltage of the AC-to-DC module 201 is isolated and converted by the DC/DC power supply module 503, the DC/DC power supply module 503 supplies power to the branch switch power failure and restoration monitoring sensor, meanwhile, the super capacitor 501 is charged by the charging and discharging protection circuit 502, and the super capacitor 501 is used as a standby power supply, so that the reliability of power supply of the sensor is improved.

The above is a detailed description of another embodiment of the branch switch outage and restoration monitoring sensor provided by the present invention, and the following is a detailed description of an embodiment of the branch switch outage and restoration monitoring system provided by the present invention.

For ease of understanding, please refer to fig. 4, the present application provides a branch switch outage and restoration monitoring system, which includes a sensor module and a monitoring terminal 700;

the number of the sensor modules is multiple, and the sensors 601, 602 and 603 adopt the branch switch power-off and power-off monitoring sensor in the above embodiment;

the sensor modules 601, 602, 603 are connected to the output ends of the branch switches 801, 802, 803 of the preset ID, the preset ID is unique, and the sensor modules 601, 602, 603 store ID information corresponding to the preset ID;

the sensor modules 601, 602, 603 are in wireless communication connection with the monitoring terminal 700, and are configured to send alarm information and ID information corresponding to the branch switches 801, 802, 803 of the preset ID to the monitoring terminal 700 when the state change of the branch switches 801, 802, 803 of the preset ID is monitored;

the alarm information includes alarm signals generated by the sensor modules 601, 602, 603 and pre-acquired alarm time and voltage signals corresponding thereto.

In this embodiment, the branch switches 801, 802, 803 of a plurality of preset IDs set different preset IDs, and simultaneously, a plurality of sensor modules 601, 602, 603 store ID information with the preset IDs respectively, when the sensor module monitors that the corresponding branch switch has a state change, the sensor module can send the ID information and alarm information to the monitoring terminal 700 at the same time, and the preset IDs can be pre-recorded, so that the first-time repair personnel can know which branch switch loop has the state change, and the repair efficiency is improved.

The above is a detailed description of an embodiment of a branch switch outage and restoration monitoring system provided by the present invention, and the following is a detailed description of an embodiment of a branch switch outage and restoration monitoring method provided by the present invention.

For convenience of understanding, please refer to fig. 5, the present application provides a branch switch outage and restoration monitoring method based on the branch switch outage and restoration monitoring sensor in the above embodiment, including the following steps:

s100: acquiring a voltage signal of the branch switch through a voltage conversion unit, and transmitting the voltage signal to a detection chip;

s200: judging whether state change occurs or not according to the voltage signal through the detection chip, and if so, generating an alarm signal and transmitting the alarm signal, and pre-acquired alarm time and voltage signal corresponding to the alarm signal to a preset monitoring terminal;

s300: and storing the alarm signal and the corresponding alarm time and voltage signal by a storage chip.

Further, the branch switch power failure monitoring sensor includes a real-time clock chip, and before transmitting the alarm signal and the corresponding pre-acquired alarm time and voltage signal to the preset monitoring terminal in step S200, the method includes:

and after receiving the alarm signal transmitted by the detection chip through the real-time clock chip, reading the alarm time corresponding to the alarm signal, and then sending the alarm time to the detection chip.

Further, the voltage conversion unit includes an AC-to-DC conversion module and a photoelectric isolation circuit, and step S100 specifically includes:

s101: after the AC-DC conversion module collects the AC voltage signal of the branch switch, the AC voltage signal is converted into a DC voltage signal;

s102: after receiving the direct current voltage signal through the photoelectric isolation circuit, the direct current voltage signal is transmitted to the detection chip.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.