Full-function electric-energy quality comprehensive test platform

Abstract

The invention belongs to the field of power system harmonic detection and treatment equipment performance test and relates to a full-function electric-energy quality comprehensive test platform. A control system structurally comprises a human-computer interface, a background workstation, an on-site workstation, a video monitoring workstation, a signal conditioning board, a control module and a relay protection device. A data acquisition card and a serial port card are inserted in the on-site workstation. The control module strategically applies IGBT (insulated gate bipolar transistor) controllable rectifying, a CPS (carrier phase shifted)-SPWM (sinusoidal pulse width modulation) multilevel PWM (pulse width modulation) strategy based on the CPS principle is selected, voltage feedforward control is added to an inverting side, and accordingly dynamic performance and stability precision are increased, and tracking error caused by periodic disturbance is eliminated by advanced repetitive learning control so that electric energy quality of an energy-taking power grid is free of influence in test process. By the aid of the test platform, voltage disturbance and current disturbance can be output respectively as well as simultaneously.In addition, the test platform can be converted according to test requirements and is highly practical.

Description

technical field [0001] The invention relates to a comprehensive test platform, in particular to a full-function power quality comprehensive test platform. Background technique [0002] At present, the problem of power quality has attracted great attention. There are a large number of equipment sensitive to power quality in many industries, especially high-tech and information industries. When the power supply of these electrical equipment is disturbed, it will affect their performance. Therefore, there is an urgent need for a high-power signal generator capable of simulating the quality of various power generated by the actual power grid to test various series or parallel electrical equipment to understand the impact of these electrical equipment on The sensitivity of power quality problems provides a basis for taking appropriate technical measures to solve the harm caused by power quality problems to electrical equipment. [0003] At present, there are five methods commonl...

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Problems solved by technology

[0004] 1. By changing the excitation voltage of the synchronous generator to cause voltage surges and dips, this method has disadvantages such as large volume, heavy weight, single function, low output accuracy, and poor versatility;

[0005] 2. Use thyristor-controlled reactors to simulate power quality signals such as voltage swells, sags, overvoltages, undervoltages, and harmonics. The disadvantages of this method are the same as those of the above method. In addition, current harmonics will also be generated;

[0006] 3. Use the power standard source to generate power quality signals. The main disadvantage of this method is that the output power is not enough to supply power for some high-power equipment. It can only be used to calibrate various AC voltmeters, AC ammeters, power meters, and phase meters. and energy meters;

Although the power can be increased to meet the needs of high-power detection, the types of signals that can be simulated are relatively small, which cannot well meet the needs of detection.

[0009] In summary, the test accuracy and reliability that can be achieved by existing high-power signal generators are not high enough

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