High-voltage electrical energy overall calibration device

Product Overview

High-voltage electrical energy overall verification device for high-voltage electrical energy measurement and traceability, high-voltage energy meters and traditional measurement devices can be directly measured the error, using high-voltage electrical energy overall verification, measurement method (invention patent No. 200510012796.3). This measurement method, the current conversion loop affecting the error, voltage conversion loop, power measurement unit and connecting wires of all the factors measured directly out of the error can be uniquely determined, without the disadvantages of subsequent installation caused by the error can not be determined.

High-voltage electrical energy overall verification, measurement method is the high-voltage electrical energy measurement device of the high-voltage into the port to the meter as a whole, the measured high-voltage electrical energy measurement device affects the error of various factors such as the transformer, the circuit voltage drop, the meter error as a whole relative error. From the high-voltage electrical energy measurement device standard circuit, and the measured high-voltage electrical energy measurement device of the high-voltage side of the three-phase (or single-phase) standard closed-loop adjustment of the high-voltage voltage, high-voltage current, high-voltage electrical energy appraisal of the whole device of the standard circuit and the measured high-voltage electrical energy measurement device of the current circuit in series, voltage circuit in parallel, the application of the specified primary voltage, primary current. Will be in the high-voltage electrical energy overall measurement device of the standard circuit, and the measured high-voltage electrical energy measurement device generated in the standard electrical energy and the measured electrical energy directly compared to measure the relative error of the high-voltage electrical energy measurement device, through the computer data processing directly print out the error value.

Working Principle

The device adopts high-voltage standard power source for output, through the real-time sampling and real-time feedback of the power of the test piece, and compares and calculates with its power signal to measure the error directly. The block diagram is shown on the right.

Product Use

It is used for the overall calibration of high-voltage energy meters and the calibration of the traditional high-voltage energy measurement device of transformer+energy meter. Technical indicators and functions

Accuracy:0.02/0.05/0.1/0.2

Voltage range: 6kV, 10kV, 20kV, 27.5kV, 35kV or any combination of automatic range switching

Current range: 20A, 30A, 50A, 75A, 100A and their ten times the automatic range switching device for each phase output maximum capacity: voltage: 1500VA device adjustment range.

Current:1500VA

Voltage:0-120%, fineness of adjustment:0.01% of full scale

Current:0-100A, fineness of adjustment:0.0001A(min)

Phase (voltage/current): 0-360.0°, fineness of adjustment: 0.1° Frequency: 45-65Hz, fineness of adjustment: 0.01Hz

Output power stability of the device: ≤ 0.05%

Output waveform distortion coefficient: voltage, current: ≤0.5%

*Harmonic output.

2-21st harmonic harmonic content <40%

3rd, 5th, 7th harmonic superposition, each harmonic content <10% wave group control (subharmonic)

Conduction angle control (odd harmonics)

Starting current output: 1mA (min)

Starting current/power measurement: 5% (greater than 1mA)

*Demand measurement error:0.1%

*Time scale accuracy: 2x10-7/S

*Communication interface check: RS485 Check communication interface according to the communication protocol of the inspected meter Type of calibration meter: all kinds of single-phase/three-phase active and reactive energy meters (including sinusoidal reactive, cross-phase 90 ° reactive, phase-shift 60 ° reactive); inductive, electronic, multifunctional, and four-quadrant energy meter

Number of calibration meters: according to customer requirements

Control mode: a. Keyboard operation

a. Keyboard operation: LCD Chinese character menu prompts, full-automatic and manual calibration.

b. PC computer operation: using Chinese WINDOWS95/WINDOWS98 operating system, fully automatic, customized calibration.

Test Functions

a. Basic error test

b. Standard deviation S-value test

c. Diving test

d. Starting test

e.Positive/reverse phase sequence and positive/reverse phase test

f.24h variation test

*g.Demand error test

*h.Clock error test

* i.Harmonic test

*j.Voltage effect

*k.Frequency effect

*l.Voltage unbalance

Database management: query, statistics, printing, networking

Device input power supply: 3x220V/380V 10%, 50Hz

Power input/output conversion efficiency:>90%.

Table Body: Split type/Integrated type

Note: “*” for optional features

Ordering instructions

Configuration according to user requirements, need to provide precision, voltage level, current range, the capacity of the test article, communication protocol, shift mode (automatic, manual), special design, etc..

Application Example

In 2005, in order to cooperate with the development of high-voltage energy meter, we applied the method of comparison with the traditional metering device, which we called the first generation. At present, this device is still used as a high-temperature walking aging of high-voltage energy meters, which plays an important role in the development of sensor-based energy meters. Advantages of large power, the disadvantage is that the phase angle can not fully meet the requirements of the energy meter measurement and verification regulations.

The first generation of traditional metering device comparison method

The second generation of open-loop overall testing device: the advantage of rapid measurement of high-voltage energy meter error, the disadvantage is that it can only measure the fixed impedance of the test article, can not be automatically adjusted according to the environment of the standard source of data.

The second generation of open-loop overall testing device

The third generation of closed-loop adjustment of high-voltage current and voltage and their phases to realize the traceability of high-voltage energy meters and traditional measuring devices as a whole, which has been applied in Shandong Electricity Academy.

Overall calibration device

Installation and utilization

At present, high-voltage power meters are installed in strong magnetic fields, high pollution, chemical plants, high humidity and other harsh environments, now running well. Practice has proved to meet the expected design requirements.

① In 2005, the first generation of our company, the first high-voltage energy meter in China, is now running well.

② Used in the ring network operation photo

③ Chemical plant and other harsh environments

④ Finalization

⑤ Running photo in the mountains of Xishuangbanna Autonomous Prefecture.

⑥ The second generation installed on 4000kVA furnace transformer running photo