High-Voltage Trip-off Mechanism of Wind Power Generators in District Grids with Large-Scale Wind Power Integration

doi:10.11930/j.issn.1004-9649.2013.5.28.5

Abstract

Abstract: Integration of large scale wind farms to a weak power grid will decrease the margin of voltage stability and increase the difficulty of voltage control. The high-voltage formation mechanism in the process of long distance transmission of large scale wind power is discussed based on an actual event of high-voltage trip-off of wind power generators. An equivalent single-machine infinite-bus system model is established to simulate the wind farm connection with the power grid through long transmission line and derive the relationship of bus voltage with wind power level and reactive power compensation. It is pointed out that there will be a sharp increase in voltage after capacitor compensation at the limited operation point, which may cause a high voltage and then make wind generators trip-off. A real grid integrated with wind farms is simulated by using the DIgSILENT software to prove the conclusions above.

Key words: wind power generator, grid-integration, capacitor compensation, voltage stability, high-voltage trip-off

CLC Number:

TM614

YANG Jin-gang, WU Lin-lin, LIU Hui, LIANG Yu-zhi, LI Qun-ju. High-Voltage Trip-off Mechanism of Wind Power Generators in District Grids with Large-Scale Wind Power Integration[J]. Electric Power, 2013, 46(5): 28-33.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2013.5.28.5

https://www.electricpower.com.cn/EN/Y2013/V46/I5/28

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