Thyristor switched capacitor high voltage valve test device and method

Abstract

The invention discloses a thyristor switching capacitor (TSC) high-voltage valve test device, and also discloses a method for using the device to carry out the TSC valve overcurrent test and operation test. The device includes two relatively independent oscillating circuits composed of two DC voltage sources, six auxiliary valves, two capacitors and two reactors. The test device realizes different working sequences and test modes through the trigger cooperation of a series of auxiliary valves. In the running test mode, the tested valve can be tested for long-term operating current and steady-state heat intensity. In the over-current test mode, the tested valve can withstand Affected by transient overcurrent, transient overvoltage and transient heat intensity, it can take into account the requirements of TSC high pressure valve operation test and overcurrent test. The test device of the present invention adopts the cooperation of the resonant circuit, and the method of superimposing the oscillating current realizes a larger test current, and distributes the test intensity to two power sources to realize the cooperation, reduces the working intensity of the test device itself, and improves the safety and reliability.

Description

technical field [0001] The invention belongs to the technical field of measurement and testing, and relates to a thyristor switching capacitor (TSC) high-voltage valve test device, and also relates to a method for using the device to conduct a TSC valve overcurrent test and operation test. Background technique [0002] With the gradual popularization of flexible AC transmission technology in power systems, the reliability of its core component - high-power high-voltage series thyristor valves has become the key to system safety. Since flexible AC transmission devices generally have the characteristics of high voltage, large current, and large capacity, it is difficult to construct a full-load circuit with the same operating conditions as the actual operating conditions in the test environment for testing. Thyristor switched capacitor (TSC) device is an important flexible AC power transmission equipment, mainly used in reactive power compensation of power system, its core com...

AI Technical Summary

Problems solved by technology

Limited to the provision of test capacity, synthetic test methods are generally used to carry out operation tests and overcurrent tests of TSC valves. The basic idea is to use multiple sets of power systems to provide TSC valves with long-term operating current, fault overcurrent and high voltage strength. , that is, the existing thyristor switching capacitor high-voltage valve test device cannot take into account the operation test and over-current test of the TSC high-pressure valve, but uses two independent test devices to achieve the test purpose of the operation test and over-current test respectively

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