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AC superposed DC synthesized voltage test power device

A technology of power supply device and voltage test, applied in the direction of testing dielectric strength, improvement of basic electrical components, etc., can solve problems such as no partial discharge power supply system

Active Publication Date: 2010-06-02
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this stage, in the IEC and domestic converter test standards, the AC withstand voltage and DC withstand voltage are used to evaluate the insulation performance of the converter converter respectively. There are no relevant reports on the AC superimposed DC non-PD power supply system at home and abroad.

Method used

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  • AC superposed DC synthesized voltage test power device
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  • AC superposed DC synthesized voltage test power device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The unit is currently undertaking the scientific and technological project of the State Grid Corporation of China "Research on the Main Insulation Characteristics of Oil-Paper Under the Condition of High-Voltage Direct Current", and the device developed by this invention has been successfully used in this project. And found many innovative research results that have not been reported at home and abroad.

[0037] Taking the breakdown characteristics of insulating oil under the pin plate condition by using the synthetic voltage test power supply device of alternating current superimposed direct current of the present invention as an example, the test layout is as follows image 3 As shown, it consists of a 0.1mm needle tip and a circular stainless steel plate with a diameter of 300mm.

[0038] exist image 3 Simultaneously apply AC and DC synthetic test voltages on the needle board model to measure the breakdown characteristics. During the test, a fixed AC voltage is ap...

Embodiment 2

[0042] see Figure 7 In the following, the application of the AC and DC power supply system of the present invention will be introduced by taking the experimental research of partial discharge under AC and DC voltages as an example. The three block diagrams in the figure are: frame figure 1 For the AC-DC power supply system, the AC-DC power supply system designed for the present invention, the principle diagram is as follows figure 1 Shown; box figure 2 Among them, Cx is the test sample, which is connected in parallel with the test power supply; image 3 The test measurement system is mainly composed of a voltage divider Ck and a detection impedance Zm. The detection impedance and the partial discharge detector are connected through a cable to realize partial discharge monitoring. The test object Cx is connected in parallel with the measurement system and then connected in parallel with the AC / DC power supply system, that is, the output voltage of the AC / DC power supply sy...

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Abstract

The invention provides an AC superposed DC synthesized voltage test power device. An output voltage can comprise a pure AC voltage, a pure DC voltage and an AC superposed DC synthesized voltage; the output AC component and DC component are independently adjustable respectively; and AC superposed DC voltage waveforms with different components are output as required. The technical scheme of the invention has great significance for research mechanism generated by partial discharge under AC and DC mixed field strength, influence of an AC / DC component on breakdown stress and effectiveness selection of proof stress of converting and transforming.

Description

technical field [0001] The invention relates to the technical field of high voltage and insulation, in particular to a synthetic voltage test power supply device in which alternating current is superimposed on direct current. The output voltage can include pure AC voltage, pure DC voltage and the composite voltage of AC superimposed DC. The output AC component and DC component are independently adjustable, and the AC superimposed DC voltage waveform of different components can be output according to the needs. Background technique [0002] my country has become a major DC power transmission country in the world, and is building the "Yunnan-Guangdong" DC transmission project with the highest voltage level in the world, the "Xiangjiaba-Shanghai" ±800kV DC transmission project (the world's current highest is ±600kV), and DC-related projects , Research projects are getting more and more attention. Existing engineering experience and statistical results show that in HVDC transmi...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R1/20
Inventor 李博李光范李金忠程涣超张书琦孙倩邓俊宇
Owner CHINA ELECTRIC POWER RES INST
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