阅读说明：本技术 一种高压注水电机电能表在线校准仪和现场校准方法 (Online calibrator and field calibration method for electric energy meter of high-voltage water injection motor ) 是由 张学超 杨晓敏 梁福元 杨学军 蔡微微 *** 龚争辉 邹彬彬 于 2019-10-30 设计创作，主要内容包括：一种高压注水电机电能表在线校准仪和现场校准方法,控制模块对校准参数实时交互录入和显示,校准数据自动采集、校准误差自动计算、校准过程自动控制、校准报告自动生成和存储等功能；执行模块通过漏电保护开关和主控回路保险对设备和操作人员安全保护,交流接触器对负载模块三相可变负载投入和切断,三相调压器模拟高压注水电机电压互感器输出100V电压,调节三相可变负载大小改变电气主回路电流值,通过电流互感模拟高压注水电机电流互感器输出0-5A电流,负载模块通过调节可变负载值大小,改变负载电流大小,实现对被校电能表多个校准点进行校准的需要。本发明能在高压注水电机运行现场对电能表进行在线校准,减轻了岗位员工劳动强度,经济效益显著。(a control module interactively inputs and displays calibration parameters in real time, and has the functions of automatic calibration data acquisition, automatic calibration error calculation, automatic calibration process control, automatic calibration report generation and storage and the like; the execution module is used for protecting equipment and operators safely through a leakage protection switch and a master control loop fuse, the alternating current contactor is used for switching on and off a three-phase variable load of the load module, the three-phase voltage regulator simulates a voltage transformer of a high-voltage water injection motor to output 100V voltage, the three-phase variable load is adjusted to change the current value of an electric main loop, the current transformer of the high-voltage water injection motor is simulated through current mutual inductance to output 0-5A current, and the load module is used for changing the load current through adjusting the variable load value to realize the requirement of calibrating a plurality of calibration points of the calibrated electric energy meter. The invention can carry out on-line calibration on the electric energy meter on the operation site of the high-pressure water injection motor, lightens the labor intensity of post staff and has obvious economic benefit.)

1. the utility model provides an online calibrator of oil field high pressure water injection motor electric energy meter, includes: the system comprises a control module, an execution module and a load module, and is characterized in that: the control module mainly comprises a touch screen (12), a programmable controller (11), a calibrated electric energy meter (10), a standard electric energy meter (6) and the like; the control module is a control command center of the calibrator, and realizes the functions of real-time interactive input and display of calibration parameters, automatic acquisition of calibration data, automatic calculation of calibration errors, automatic control of the calibration process, automatic generation and storage of calibration reports and the like in the whole calibration process; the execution module mainly comprises a three-phase wiring terminal (1), a leakage protection switch (2), a main control loop fuse (3), a three-phase voltage regulator (4), a current transformer (5), an alternating current contactor (7) and a current loop fuse (9); the execution module is an execution center of the calibrator and realizes the safety protection of equipment and operators through the leakage protection switch (2) and the master control loop fuse (3); the three-phase variable load (8) of the load module is switched on and off through the alternating current contactor (7); the induced voltage output by a voltage transformer PT (6000V/100V) of the high-voltage water injection motor is simulated by outputting 100V voltage by a three-phase voltage regulator (4); the current value of the electric main loop is changed by adjusting the size of the three-phase variable load (8); then 0-5A current is output through the current transformer (5), and induced current generated by a current transformer CT of the high-voltage water injection motor is simulated, so that the on-line calibration of the electric energy meter (10) to be calibrated is realized; the load module is a three-phase variable load (8) consisting of three variable loads, the load module is a load center of the calibrator, and the requirement of calibrating a plurality of calibration points of the calibrated electric energy meter (10) is met by adjusting the magnitude of the variable load value and changing the magnitude of load current.

2. the high-pressure water injection motor electric energy meter on-line calibrator according to claim 1, characterized in that: the control module adopts a touch screen (12) and a programmable controller (11) as a control command center, realizes man-machine interaction by clicking a function key arranged on the touch screen (12), completes real-time input and output of calibration parameters, realizes the functions of automatic acquisition of calibration data, automatic control of a calibration process, automatic calculation of calibration errors, automatic generation and storage of calibration reports and the like, digital display of calibration data, dynamic demonstration of the calibration process and visual and vivid pictures.

3. The field calibration method of the high-voltage water injection motor electric energy meter on-line calibrator comprises the following steps:

Step 1, placing an on-line calibrator of the electric energy meter of the high-voltage water injection motor at a proper position of a power distribution room, and meeting the requirement of safe distance with a calibrated electric energy meter (10);

step 2, connecting the Ua, Ub and Uc voltage loops of the three phases 100V of the three-phase voltage regulator (4) with the Ua, Ub and Uc voltage connecting terminals corresponding to the electric energy meter (10) to be calibrated respectively, and connecting the Ia and Ic current loops of the current transformer (5) with the Ia and Ic current connecting terminals corresponding to the electric energy meter (10) to be calibrated respectively;

Step 3, connecting the three-phase 380V power supply with the three-phase wiring terminal (1);

step 4, closing the switch of the leakage protection switch (2);

step 5, inputting the pulse number n required by the calibration of the calibrated electric energy meter (10) on the touch screen (12), and calculating the operation electric quantity Wx (n/c) of the calibrated electric energy meter (10) according to the factory parameter c (2000 p/kWH) of the calibrated electric energy meter (10);

Step 6, clicking a touch screen (12) to start a function key, connecting a three-phase variable load (8) of a load module, and starting a calibration process; step 7, when the online calibrator of the electric energy meter of the high-pressure water injection motor receives the pulse of the first electric energy meter (10) to be calibrated, the programmable controller (11) automatically starts the standard electric energy meter (6) to meter the electric quantity Wo;

Step 8, when the pulse number in the programmable controller (11) reaches a set value, the programmable controller (11) automatically stops the standard electric energy meter (6) from metering the electric quantity Wo, meanwhile, the programmable controller (11) disconnects the alternating current contactor (7) of the execution module, the three-phase variable load (8) of the load module is disconnected, and the calibration process is finished;

and 9, after the calibration process is finished, clicking an energy meter error calculation function key on the touch screen (12), automatically calculating a calibration error and storing a calibration report:

Calculation formula of calibration error r% of electric energy meter (10) to be calibrated

r%=(Wx―Wo)/Wo ×100%

in the formula: wx- -operating electric quantity of electric energy meter (10) to be calibrated, kw.h

Wo- -standard electric energy meter (6) measures electric quantity, kw.h

Step 10, disconnecting a switch of the leakage protection switch (2) of the calibrator, disconnecting a field power supply, and removing a power supply wiring after verifying that the calibration three-phase wiring terminal (1) is electroless;

and 11, removing all the wiring of the on-line calibrator of the electric energy meter of the high-voltage water injection motor and the electric energy meter (10) to be calibrated.

Technical Field

the invention relates to online calibration of an electric energy meter of a high-pressure water injection motor in an oil field, belongs to the technical field of instrument and instrument verification, and particularly relates to an online calibration instrument and a field calibration method of the electric energy meter of the high-pressure water injection motor.

Background

After the oil field is put into development, along with the continuous exploitation of oil and natural gas in a reservoir stratum, the bottom hole pressure is inevitably reduced continuously, and meanwhile, the reservoir stratum pressure is inevitably reduced continuously along with the increase of development time. In order to improve the recovery efficiency of crude oil, a method of injecting water into the ground to supplement energy to an oil layer is a method for keeping pressure exploitation relatively mature, so that water injection of an oil field becomes one of the most important work in current oil production, along with the development of the oil field, the water content of the oil field is continuously increased, the liquid production amount is increased day by day, and the water injection system of the oil field has more and more prominent effects in increasing and stabilizing the yield.

The victory oil field island oil production plant is provided with 9 high-pressure water injection stations and 44 high-pressure water injection motors, the annual power consumption electric quantity is 2.4 hundred million kw.h, the whole victory oil field is provided with 59 high-pressure water injection stations and 350 high-pressure water injection motors, and the annual power consumption electric quantity is about 20 hundred million kw.h. The high-pressure water injection motor has the characteristics that: firstly, the power utilization voltage is high, the single machine power is high, the rated voltage of the high-voltage water injection motor is 6kV, and the rated power is 2000 kw; secondly, the continuous working time is long, and the power consumption is high, which is a big household for oil fields. The electric energy meter of the high-pressure water injection motor is regularly calibrated, which is the primary task of ensuring the accurate measurement of the electric energy of the high-pressure water injection motor and is also the requirement of fine management of enterprises.

according to the national people's republic of China metering method and the electric energy meter verification regulation, the electric energy meter is used as an important energy metering unit of the country and enterprises, and must be regularly checked according to the regulation to ensure the good and normal operation of the metering device. The electric energy meter for metering the electricity consumption of the high-pressure water injection motor (rated power 2000 kw) of the oil field belongs to a II-type electric energy meter, and is required to be checked for 1 time every 1-2 years.

along with the progress of scientific technology and the updating and transformation of metering equipment, the electric energy meter of the high-pressure water injection motor is replaced by an intelligent electric energy meter at present, the automation degree is high, the wiring is complex, the field disassembly difficulty is very high, and the basic level personnel can not pass the traditional method of sending the electric energy meter to a laboratory for verification, so that the electric energy meter in use is subjected to the phenomenon of detection failure, is punished by a large team in oil field quality inspection for many times, and the research and development of the on-line calibration equipment and technology of the electric energy meter of the high-pressure water injection motor are imperative.

Disclosure of Invention

aiming at the defects, the invention provides the on-line calibrator and the on-site calibration method for the electric energy meter of the high-pressure water injection motor, in order to realize the on-line calibration of the electric energy meter of the high-pressure water injection motor and avoid the phenomenon of detection removal of the electric energy meter.

the invention comprises the following steps: the system comprises a control module, an execution module and a load module, and is characterized in that: the control module mainly comprises a touch screen, a programmable controller, a calibrated electric energy meter, a standard electric energy meter and the like. The control module is a control command center of the calibrator, and realizes the functions of real-time interactive input and display of calibration parameters, automatic acquisition of calibration data, automatic calculation of calibration errors, automatic control of the calibration process, automatic generation and storage of calibration reports and the like in the whole calibration process; the execution module mainly comprises a three-phase wiring terminal, a leakage protection switch, a master control loop fuse, a three-phase voltage regulator, a current transformer, an alternating current contactor and a current loop fuse. The execution module is an execution center of the calibrator and realizes the safety protection of equipment and operators through the leakage protection switch and the master control loop insurance; the three-phase variable load input and cut-off function of the load module is realized through the alternating current contactor; the induced voltage output by a voltage transformer PT (6000V/100V) of the high-voltage water injection motor is simulated by outputting 100V voltage by the three-phase voltage regulator 4; the current value of the electric main loop is changed by adjusting the size of the three-phase variable load; then 0-5A current is output through current mutual inductance, and induced current generated by a current transformer CT of the high-voltage water injection motor is simulated, so that online calibration of the electric energy meter to be calibrated is realized; the load module is a load center of the calibrator, and the requirement for calibrating a plurality of calibration points of the calibrated electric energy meter is met by adjusting the variable load value and changing the load current.

The control module in the on-line calibrator for the high-pressure water injection motor electric energy meter adopts a touch screen and a programmable controller as a control command center, realizes man-machine interaction by clicking a function key arranged on the touch screen, completes real-time input and output of calibration parameters, realizes automatic acquisition of calibration data, automatic control of a calibration process, automatic calculation of calibration errors, automatic generation and storage of calibration reports and other functions, digital display of calibration data, dynamic demonstration of the calibration process and visual and vivid picture.

the field calibration method of the high-voltage water injection motor electric energy meter on-line calibrator comprises the following steps:

(1) the online calibrator for the electric energy meter of the high-voltage water injection motor is placed at a proper position of a power distribution room, and meets the requirement of safe distance with the electric energy meter to be calibrated;

(2) The voltage loop of Ua, Ub and Uc of 100V of three phases of the three-phase voltage regulator is respectively connected with the voltage connecting terminals of Ua, Ub and Uc corresponding to the electric energy meter to be calibrated, and the Ia and Ic current loops of the current transformer are respectively connected with the Ia and Ic current connecting terminals corresponding to the electric energy meter to be calibrated;

(3) Connecting a three-phase 380V power supply with a wiring terminal;

(4) Closing the leakage protection switch;

(5) Inputting the pulse number n required by the calibration of the calibrated electric energy meter on the touch screen, and calculating the operation electric quantity Wx (n/c) of the calibrated electric energy meter according to the factory parameter c (2000 p/kWH) of the calibrated electric energy meter.

(6) And clicking a touch screen starting function key, switching on the three-phase variable load of the load module, and starting the calibration process.

(7) when the on-line calibrator of the electric energy meter of the high-pressure water injection motor receives the pulse of the first electric energy meter to be calibrated, the programmable controller automatically starts the standard electric energy meter to meter the electric quantity Wo;

(8) when the pulse number in the programmable controller reaches a set value, the programmable controller automatically stops the standard electric energy meter from metering the electric quantity Wo, simultaneously the programmable controller disconnects the alternating current contactor of the execution module, the three-phase variable load of the load module is disconnected, and the calibration process is finished;

(9) After the calibration process is finished, clicking an electric energy meter error calculation function key on the touch screen, automatically calculating a calibration error and storing a calibration report:

Calculation formula of calibrated error r% of electric energy meter

r%=(Wx―Wo)/Wo ×100%

in the formula: wx- -operating electric quantity of electric energy meter (10) to be calibrated, kw.h

wo- -standard electric energy meter (6) measures electric quantity, kw.h

(10) disconnecting the leakage protection switch of the calibrator, disconnecting the field power supply, and removing the power supply wiring after verifying that the calibration three-phase wiring terminal is electroless;

(11) and (4) removing all the wiring of the on-line calibrator of the electric energy meter of the high-voltage water injection motor and the electric energy meter to be calibrated.

The working principle is as follows: the high-voltage water injection motor electric energy meter is different from a common low-voltage electric energy meter in input voltage, the common electric energy meter has the input voltage of 220V or 380V, and the high-voltage water injection motor electric energy meter has the input voltage of 100V, so that the common electric energy meter online calibration equipment cannot perform online calibration on the high-voltage water injection motor electric energy meter. The on-line calibrator for the electric energy meter of the high-voltage water injection motor is used for generating 100V voltage by using a three-phase voltage regulator of the calibrator and simulating 100V secondary voltage generated by a voltage transformer of the high-voltage water injection motor; the secondary current generated by the current transformer of the high-voltage water injection motor is simulated by using the 0-5A current generated by three variable loads of the calibrator, so that the on-line calibration of the electric energy meter of the high-voltage water injection motor is realized.

The invention has the beneficial effects that: the electric energy meter can be calibrated on line on the operation site of the high-pressure water injection motor, the phenomenon of off-inspection of the electric energy meter is avoided, the electric energy meter does not need to be dismounted and sent to a verification chamber for verification, the labor intensity of post workers is reduced, time and labor are saved, the verification cost is saved, the work level of metering management is improved, and the economic benefit is remarkable.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation.

FIG. 1-Electrical schematic of the invention

FIG. 2-main electrical wiring diagram of the invention

FIG. 3 is a wiring diagram of a programmable controller according to the present invention

FIG. 4 is a flowchart of the control procedure of the present invention

FIG. 5 is a circuit diagram of an analog on-line calibration of a calibrated electric energy meter

FIG. 6 is a functional display diagram of the touch screen of the online calibrator for the electric energy meter to be calibrated

The labels in the figures are: 1. three-phase connecting terminals, 2, a leakage protection switch, 3, a master control loop fuse, 4, a three-phase voltage regulator, 5, a current transformer, 6, a standard electric energy meter, 7, an alternating current contactor, 8, a three-phase variable load, 9, a current loop fuse, 10, a calibrated electric energy meter, 11, a programmable controller, 12, a touch screen, 13, an on-line calibrator panel of the electric energy meter of the high-voltage water injection motor, 14, a high-voltage motor electric energy metering circuit, A, B, a C.380V three-phase power supply, a PT. high-voltage water injection motor voltage transformer (6000V/100V), a CT. high-voltage water injection motor current transformer, 100V three-phase power supply voltage connecting terminals of a, Ub and Uc. three-phase voltage regulators 4, current connecting terminals of Ia and Ic. current transformers, In. grounding connecting terminals, a, b, d. e, f, g, h, f, g, h. calibrated electric energy meter 10 terminal.

Detailed Description

The invention will be further elucidated with reference to the drawings in which:

as shown in fig. 1, the present invention includes: the system comprises a control module, an execution module and a load module, and is characterized in that: the control module mainly comprises a touch screen 12, a programmable controller 11, a calibrated electric energy meter 10, a standard electric energy meter 6 and the like. The control module is a control command center of the calibrator, and realizes the functions of real-time interactive input and display of calibration parameters, automatic acquisition of calibration data, automatic calculation of calibration errors, automatic control of the calibration process, automatic generation and storage of calibration reports and the like in the whole calibration process; the execution module mainly comprises a three-phase wiring terminal 1, a leakage protection switch 2, a main control loop fuse 3, a three-phase voltage regulator 4, a current transformer 5, an alternating current contactor 7 and a current loop fuse 9. The execution module is an execution center of the calibrator and realizes the safety protection of equipment and operators through the leakage protection switch 2 and the master control loop fuse 3; the three-phase variable load 8 of the load module is switched on and off through the alternating current contactor 7; the induced voltage output by a voltage transformer PT (6000V/100V) of the high-voltage water injection motor is simulated by outputting 100V voltage by the three-phase voltage regulator 4; the current value of the electric main loop is changed by adjusting the size of the three-phase variable load 8; then, 0-5A current is output through the current transformer 5, and induced current generated by a current transformer CT of the high-voltage water injection motor is simulated, so that online calibration of the electric energy meter 10 to be calibrated is realized; the load module is a three-phase variable load 8 consisting of three variable loads, the load module is a load center of the calibrator, and the requirement of calibrating a plurality of calibration points of the calibrated electric energy meter 10 is met by adjusting the variable load value and changing the load current.

The control module adopts a touch screen 12+ a programmable controller 11 as a control command center, realizes man-machine interaction by clicking a function key arranged on the touch screen 12, completes real-time input and output of calibration parameters, realizes automatic acquisition of calibration data, automatic control of a calibration process, automatic calculation of calibration errors, automatic generation and storage of calibration reports and other functions, digital display of calibration data, dynamic demonstration of the calibration process, and visual and vivid pictures.

The field calibration method of the high-voltage water injection motor electric energy meter on-line calibrator comprises the following steps:

As shown in figures 5 and 6 of the drawings,

step 1, placing an on-line calibrator of the electric energy meter of the high-voltage water injection motor at a proper position of a power distribution room, and meeting the requirement of safe distance with a calibrated electric energy meter 10;

Step 2, connecting the Ua, Ub and Uc voltage loops of the three phases 100V of the three-phase voltage regulator 4 with the Ua, Ub and Uc voltage connection terminals corresponding to the electric energy meter 10 to be calibrated respectively, and connecting the Ia and Ic current loops of the current transformer 5 with the Ia and Ic current connection terminals corresponding to the electric energy meter 10 to be calibrated respectively;

Step 3, connecting the three-phase 380V power supply with the wiring terminal 1;

Step 4, closing the switch of the leakage protection switch 2;

And 5, inputting the pulse number n required by the calibration of the calibrated electric energy meter 10 on the touch screen 12, and calculating the operation electric quantity Wx (n/c) of the calibrated electric energy meter 10 according to the factory parameter c (2000 p/kwh) of the calibrated electric energy meter 10.

And 6, clicking the touch screen 12 to start a function key, switching on the three-phase variable load 8 of the load module, and starting a calibration process.

Step 7, when the on-line calibrator for the electric energy meter of the high-pressure water injection motor receives the pulse of the first electric energy meter 10 to be calibrated, the programmable controller 11 automatically starts the standard electric energy meter 6 to meter the electric quantity Wo;

Step 8, when the pulse number in the programmable controller 11 reaches a set value, the programmable controller 11 automatically stops the standard electric energy meter 6 from metering the electric quantity Wo, meanwhile, the programmable controller 11 disconnects the alternating current contactor 7 of the execution module, the three-phase variable load 8 of the load module is disconnected, and the calibration process is finished;

And 9, after the calibration process is finished, clicking an electric energy meter error calculation function key on the touch screen 12, automatically calculating a calibration error and storing a calibration report:

Calculation formula of 10 calibration error r% of electric energy meter to be calibrated

r%=(Wx―Wo)/Wo ×100%

In the formula: wx- -electric energy meter 10 operation electric quantity to be calibrated, kw.h

wo- -standard electric energy meter 6 metering electric quantity, kw.h

Step 10, disconnecting a switch of the leakage protection switch 2 of the calibrator, disconnecting a field power supply, and removing a power supply wiring after verifying that the calibration three-phase wiring terminal 1 is electroless;

and 11, removing all the wiring of the on-line calibrator for the electric energy meter of the high-voltage water injection motor and the electric energy meter 10 to be calibrated.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.