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Test device and test method for steady-state high-power operation of flexible HVDC converter valve

A flexible DC transmission and operation test technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problem of difficulty in constructing full-load circuit tests, etc., and achieve the effect of flexible operation and simple control method.

Active Publication Date: 2017-11-07
XJ ELECTRIC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Since flexible direct current transmission (VSC-HVDC) devices generally have the characteristics of high voltage, high current, and large capacity, it is difficult to construct a full-load circuit in the test environment that is the same as the actual operating condition for testing. Therefore, how to test in the test environment It is the key to solve the problem to construct an equivalent test circuit and conduct a test with the strength equivalent to the actual operating condition.

Method used

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  • Test device and test method for steady-state high-power operation of flexible HVDC converter valve
  • Test device and test method for steady-state high-power operation of flexible HVDC converter valve
  • Test device and test method for steady-state high-power operation of flexible HVDC converter valve

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] Device embodiment of the present invention:

[0027] Such as figure 1 , the test device of the present invention includes an input circuit breaker switch KM, a three-phase voltage regulator TY, a filter reactor LR, an isolation transformer TR, a rectifier bridge REC1, a BUCK-BOOST buck-boost circuit, and a converter valve group. The group is composed of n+k converter valve sub-modules SM1~SM(n+k) connected in series, including k redundant sub-modules, the number of sub-modules actually put into operation is n, and the converter valve group is connected in parallel The DC output terminal of the rectifier bridge, the BUCK-BOOST buck-boost circuit includes a first IGBT module T, a first resistor R1 connected in series with the first IGBT module T, a DC bus supporting capacitor C1 and a load reactor L1, and a DC bus supporting capacitor C1 is connected i...

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Abstract

The invention relates to a flexible direct current transmission converter valve steady-state high-power running testing device and a testing method. The testing device comprises an isolation transformer (TR1), a rectifier bridge (REC1) and a converter valve group. An alternating current input end of the rectifier bridge is connected with the isolation transformer. A direct current output end of the rectifier bridge is connected with the converter valve group. The testing device further comprises a BUCK-BOOST circuit which comprises an insulated gate bipolar translator (IGBT) module formed by an IGBT and an antiparallel diode, a resistor (R), a direct current bus support capacitor (C1) and a load electric reactor (L1). The resistor (R) and the IGBT module are connected in series and then connected with a direct current output end of rectifier bridge (REC1) in parallel. The direct current bus support capacitor (C1) is connected with two ends of a series branch circuit of the resistor (R) and the IGBT module in parallel and is connected with the converter valve group through the load electric reactor (L1). Through construction of a test platform which accords with the actual steady-state operation condition, the flexible direct current transmission converter valve steady-state high-power running testing device carries out steady-state power operation tests of a converter valve, carries out detection to current, voltage and temperature rising of components, and checks the correctness of design of the converter valve.

Description

technical field [0001] The invention relates to a test device and a test method for steady-state high-power operation of a flexible DC transmission converter valve. Background technique [0002] Since flexible direct current transmission (VSC-HVDC) devices generally have the characteristics of high voltage, high current, and large capacity, it is difficult to construct a full-load circuit in the test environment that is the same as the actual operating condition for testing. Therefore, how to test in the test environment It is the key to solve the problem to construct an equivalent test circuit and conduct a test with the strength equivalent to the actual operating condition. [0003] VSC-HVDC based on modular multi-level converter valves is a new technology that uses IGBT valves for DC power transmission. The sub-module (SM) is the smallest power unit that constitutes the converter valve. Capacitors are connected in parallel, and several sub-modules are connected in series...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 姚为正刘刚孙健姚钊夏克鹏李海鲲
Owner XJ ELECTRIC
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