Converter valve reverse recovery phase protective characteristic test method and corresponding system
A technology of reverse recovery period and protection characteristics, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., to achieve the effect of improving reliability
Inactive Publication Date: 2015-11-04
XJ ELECTRIC +1
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[0006] The purpose of the present invention is to provide a method for testing the protection characteristics of the reverse recovery period of the converter valve and the corresponding system, so as to solve the problem of the converter valve before the converter valve product leaves the factory. The problem of testing the protection characteristics of the reverse recovery period
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[0017] Example of Test Method for Protection Characteristics of Converter Valve in Reverse Recovery Period
[0018] The method for testing the protection characteristics of the reverse recovery period of the converter valve according to the embodiment of the present invention includes the following steps:
[0019] (1) Apply an AC voltage to both ends of the converter valve assembly to simulate the actual operating conditions of the converter valve;
[0020] An AC voltage is applied across the thyristor stage of the converter valve to simulate the actual operating conditions of the converter valve in the DC transmission system. After the converter valve receives power, it sends an IP signal to the control unit. When the control unit detects the IP signal sent back by the converter valve, it sends out an FP signal at a fixed angle α of the AC voltage phase to trigger the thyristor on the converter valve assembly. class.
[0021] (2) When the converter valve component is in the...
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The invention relates to a converter valve reverse recovery phase protective characteristic test method and a corresponding system. The method comprises the following steps that (1) AC voltage is applied to the two ends of a converter valve component so as to simulate the actual operation condition of the converter valve; (2) and when the converter valve component is in a reverse recovery phase protective interval, forward impulse voltage is superposed with AC voltage to be applied to the converter valve component together; voltage waveform of the converter valve is observed; when forward impulse voltage of the converter valve drops, response of the reverse recovery phase protective characteristic of the converter valve component is judged to be correct; and response is incorrect under other conditions. Testing of forward impulse voltage superposed with AC voltage is performed on the converter valve component in the reverse recovery phase protective interval and out of the reverse recovery phase protective interval respectively, correctness of response of the reverse recovery phase protective characteristic of the converter valve component is judged and a situation that the thyristor level of the converter valve component has the condition of bearing forward impulse voltage is verified, and thus reliability of actual operation of the converter valve product is enhanced.
Description
technical field [0001] The invention belongs to the field of high-voltage direct current transmission, and in particular relates to a method for testing protection characteristics of a reverse recovery period of a converter valve and a corresponding system. Background technique [0002] The high-voltage direct current transmission system has been widely used in my country. The converter valve connected in series with high-power thyristor devices is the core equipment of the high-voltage direct current transmission project converter station, and its stable and reliable operation plays a vital role in the entire system. The core component of the converter valve is the thyristor, which is expensive and has important functions. Usually, a single system requires thousands of thyristors. Therefore, it is very necessary to monitor and protect the operating state of the thyristor. [0003] The thyristor can only be triggered when a positive voltage is applied and a trigger pulse is...
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IPC IPC(8): G01R31/00
Inventor 姚为正常忠廷李娟赵岩才利存徐涛邱育林董意锋
Owner XJ ELECTRIC