Converter valve simulation platform and realization method thereof

A technology of simulation platform and implementation method, which is applied in the field of power electronics, can solve problems such as commutation failure, and achieve the effects of ensuring real-time performance, accurate and reliable simulation, and simple control logic

Active Publication Date: 2016-04-20
STATE GRID CORP OF CHINA +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

When γ is less than the critical cut-off angle γmin, the valve will fail to comm

Method used

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  • Converter valve simulation platform and realization method thereof
  • Converter valve simulation platform and realization method thereof
  • Converter valve simulation platform and realization method thereof

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Embodiment Construction

[0041] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0042] The invention is a simulation platform for analyzing the influence of the internal operating parameters and electrical parameters of the converter valve on the phase commutation failure. The commutation failure of converter valve is one of the most common faults in HVDC transmission system, which will lead to many adverse consequences, directly related to the safety of equipment and system. The essence of the commutation failure of the converter valve is that the operating cut-off angle is smaller than the critical cut-off angle of the converter valve, and both are affected by various factors inside the valve. The present invention measures and calculates the internal sub-factors of the converter valve that affect the shut-off process in real time, and obtains the real-time critical shut-off angle of the valve acc...

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Abstract

The invention relates to a converter valve simulation platform and a realization method thereof. The simulation platform comprises a three-phase six-pulse bridge circuit, each phase is composed of valve modules connected in series, and each valve module is internally equipped with an auxiliary thyristor valve and a controlled switch. The realization method comprises the steps of measuring and calculating converter valve internal sub-factors affecting the turn-off process in real time, working out the real-time critical turn-off angle of a valve based on device test data and dispersity, comparing the real-time critical turn-off angle with a measured operation turn-off angle, and simulating a corresponding valve commutation failure process when judging that a commutation failure may happen. The invention provides a new means of research for researching and analyzing the influence of converter valve internal factors on commutation failure and the commutation failure property of converter valves.

Description

technical field [0001] The invention relates to a simulation platform in the field of power electronics and a realization method thereof, in particular to a converter valve simulation platform and a realization method thereof. Background technique [0002] Commutation failure is one of the most common faults in HVDC transmission systems, which can lead to many adverse consequences. In order to ensure the success of the commutation, it is required that the time from the shut-off to the zero-crossing point when the voltage changes from negative to positive can meet the requirement of recovering the blocking ability of the valve that exits conduction. This time is expressed by the electrical angle γ angle, which is called shut-off horn. The critical shut-off angle γmin is the minimum value necessary for the valve to complete shut-off. When γ is less than the critical cut-off angle γmin, the valve will fail to commutate, both of which are affected by various factors inside the...

Claims

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Application Information

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IPC IPC(8): G05B17/02
Inventor 许韦华阳岳希李娜查鲲鹏魏晓光张皓
Owner STATE GRID CORP OF CHINA
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