Flexible DC transmission voltage source converter valve operation test device

A voltage source converter, flexible DC transmission technology, applied in circuit breaker testing, measuring devices, instruments, etc., can solve the problem of not giving a test loop and so on

Active Publication Date: 2016-03-02
XIAN HIGH VOLTAGE APP RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The CIGREB448 working group elaborated and analyzed the stress withstood by valves under various working conditions in detail, and

Method used

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  • Flexible DC transmission voltage source converter valve operation test device
  • Flexible DC transmission voltage source converter valve operation test device
  • Flexible DC transmission voltage source converter valve operation test device

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Embodiment Construction

[0022] The specific implementation manners of the present invention will be further described in detail below in conjunction with the drawings and embodiments.

[0023] like figure 1 As shown, the present invention is a flexible DC transmission voltage source converter valve operating test device, including 1 # Sample valve V1, 2 # The sample valve V2, the auxiliary valve V3, the test power supply S, the test capacitor C, the test reactor L1, and the current-limiting reactors L2 and L3 are composed. The test power supply S and the current limiting reactor L2 are connected in series with the high voltage end of the test capacitor C; the high voltage end of the test capacitor C is connected to the high voltage end of the auxiliary valve V3; the low voltage end of the auxiliary valve V3 is connected in series with the current limiting reactor L3 and connected to the 1 # The high-voltage end of the test valve V1 is connected, the low-voltage end of the auxiliary valve V3 is conn...

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PUM

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Abstract

The invention discloses a flexible DC transmission voltage source converter valve operation test device. The particular technical scheme is as follows: a test power supply is used for charging two sample valve assemblies and an assistant valve group, and a constant DC voltage control strategy is used for enabling voltage of each valve submodule to be distributed uniformly and required test voltage is achieved; a nearest level modulation strategy is adopted to generate test voltage at two ends of the two sample valves, and the two sample valves have the same DC voltage components and AC voltage components with the same amplitudes and different phases; under effects of the test voltage, the two sample valves form a closed-loop power circuit via a test reactor, the test reactor and a sample valve submodule capacitor perform electromagnetic energy exchange in the power closed-loop circuit to obtain test current, and the current contains a power frequency fundamental wave current component, a DC current component and a doubled power frequency loop current component; and the test power supply is used for energy complementation on operation loss of the test circuit, and the assistant valves are used for balancing test voltage fluctuation caused by the power grid.

Description

Technical field: [0001] The invention belongs to the fields of flexible high-voltage direct current transmission, power electronics technology and user electric power technology, and in particular relates to a flexible direct current transmission voltage source converter valve operation test device. Background technique: [0002] At present, my country is extensively carrying out research on Flexible-HVDC technology based on MMC-type voltage source converter (VSC) valves. There have been ±160kV / 200MW South Australia three-terminal flexible The terminal flexible DC project was put into operation, and the ±350kV / 1000MW Luxi asynchronous interconnected flexible DC transmission project also entered the project implementation stage. As the core equipment of Flexible-HVDC, the electrical performance of the voltage source converter valve will directly affect the safe and reliable operation of the system, and its performance needs to be assessed through equivalent test methods and te...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/3272
Inventor 胡治龙许钒刘朴徐子萌张腾张长春王奔同聪维黄熹东
Owner XIAN HIGH VOLTAGE APP RES INST CO LTD
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