Partial dichotomy test method for voltage sag endurance capability
A technology of voltage sag and test method, which is applied in the direction of environment/reliability test, measuring electricity, measuring device, etc. It can solve the problems of slow test speed, low curve accuracy, easy to miss key points of non-rectangular tolerance curve, etc. , to achieve the effect of small test workload and high test accuracy
Pending Publication Date: 2020-10-16
HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST
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[0004] A comprehensive analysis of the existing test methods found that the existing test methods are mainly based on the test method proposed in the IEEE 1668-2017 standard and the point-by-point method. The test method proposed in the IEEE 1668-2017 standard has a clear test plan, but it is easy to miss non-rectangular The key points of the tolerance curve; the point-by-point test method has high accuracy under a small test step size, but the workload is heavy and time-consuming
The above-mentioned test methods for the voltage sag tolerance of equipment have low accuracy of the test curve, slow test speed, and cannot accurately measure the VTC of the 0° starting point of the AC contactor. The test accuracy of the horizontal part of the rectangular voltage withstand curve not high disadvantage
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[0031] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described in conjunction with the accompanying drawings.
[0032] see Figure 1 to Figure 2 In one aspect, the present invention discloses a partial dichotomy test method for voltage sag tolerance, comprising the following steps:
[0033] S1. Determine the initial voltage sag amplitude of the power equipment to be tested. The initial voltage sag amplitude is 0%, and the voltage sag amplitude starts from 0% and increases in steps of 5%, and the power equipment to be tested is determined by the time dichotomy method. Duration T under voltage sag amplitude 0 ;
[0034] S2. Under different voltage sag amplitudes, the power equipment to be tested is tested cyclically by the time dichotomy method. During the cyclic test, if the maximum duration T max If the power equipment under test does not fail, it is determined that...
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The invention provides a partial dichotomy test method for voltage sag endurance capability. According to the characteristic that a voltage tolerance curve has a rectangular shape and a non-rectangular shape, the whole amplitude-duration time plane is divided into two parts by utilizing a special position at an inflection point, and then different methods are respectively adopted for rapid test according to different characteristics of the two parts.
Description
technical field [0001] The invention relates to the technical field of voltage drop tolerance testing, in particular to a partial dichotomy method for testing voltage sag tolerance. Background technique [0002] Equipment in modern industrial parks tends to be integrated and sophisticated, and a large number of precision equipment is put into production and life. In this context, the contradiction between the voltage sag event as an inevitable event in the power system and the increasingly sensitive high-tech precision equipment is becoming increasingly abrupt. Industrial users show that normal production is affected and suffer a lot of economic losses; power grid companies show that they suffer repeated complaints from users and the loyalty of power-consuming enterprises decreases; local governments show that they seriously affect investment promotion and hinder regional development. Therefore, it has become a hot and difficult point in the industry and academia to study t...
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IPC IPC(8): G01R31/00
CPCG01R31/003
Inventor 李天楚伍智鹏方铭李科得邢博宇施寅悦
Owner HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST