A flexible DC transmission voltage source converter valve operation test device

A technology of voltage source converter and flexible direct current transmission, which is applied in the direction of circuit breaker testing, measuring devices, instruments, etc., and can solve problems such as not giving test circuits

Active Publication Date: 2018-02-23
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 CIGRE B4 48 working group elaborated and analyzed the stress withstood by valves under various working conditions in detail, and put forward relevant test suggestions; IEC 62501 formulated relevant valve test standards, but did not give specific test circuit

Method used

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  • A flexible DC transmission voltage source converter valve operation test device
  • A flexible DC transmission voltage source converter valve operation test device
  • A flexible DC transmission voltage source converter valve operation test device

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Embodiment Construction

[0022] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

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

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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 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 conducting extensive research on flexible-HVDC technology based on MMC-type voltage source converter (VSC) valves. The terminal flexible DC project was put into operation, and the ±350kV / 1000MW Luxi asynchronous network flexible DC transmission project also entered the project implementation stage. As the core equipment of flexible direct current transmission (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 test loops. Because the basic working principle and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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