Loop closing fixed value setting and checking method of ultra-high voltage alternating-current system

Abstract

The invention relates to a loop closing fixed value setting and checking method of an ultra-high voltage alternating-current system. The loop closing fixed value setting and checking method comprises a fixed value setting part and a fixed value checking part, wherein the fixed value setting part comprises loop closing voltage difference fixed value and phase angle difference fixed value setting. According to the loop closing fixed value setting and checking method of the technical scheme provided by the invention, reactive voltage and tidal current distribution of the ultra-high voltage alternating-current system are accurately analyzed, and a loop closing voltage difference fixed value is determined according to a tapping gear of an ultra-high voltage transformer, the operating level of network voltage and the like; a loop closing phase angle difference fixed value is determined according to section power and tidal current distribution before loop closing; whether the fixed values are feasible is checked according to the influence of loop closing impact power on the stability of a power system. The loop closing fixed value setting and checking method is suitable for the ultra-high voltage alternating-current power transmission system.

Description

technical field [0001] The invention relates to a setting and checking method of an ultra-high voltage AC system, in particular to a method for setting and checking the ring-closing setting of an ultra-high voltage AC system. Background technique [0002] The UHV AC system refers to the AC power system with a voltage level of 1000 kV and above. Ring closure refers to the closed operation of the network composed of lines, transformers or circuit breaker strings in the power system. For example, figure 1 The shown system 1 and system 2 have been connected through the AC line 1, the switch on one side of the AC line 2 is closed (shown in black), and the switch K on the other side (shown in white) is in the open state, then the operation of closing the switch K is Ring operation. [0003] When the voltage difference and phase angle difference on both sides of the loop closing point are too large, the power impact on the power system will be greater when the loop is closed, an...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a UHV AC system loop-closing setting checking method to solve the problem of how to reasonably and accurately give the UHV AC system loop-closing setting

Images