首页|Large-disturbance Stability Analysis of Power Systems with Synchronous Generator and Converter-interfaced Generation
Large-disturbance Stability Analysis of Power Systems with Synchronous Generator and Converter-interfaced Generation
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This letter studies large-disturbance stability of the power system with a synchronous generator(SG)and a convert-er-interfaced generation(CIG)connected to infinite bus.The power system is multi-timescale and first simplified.It is shown that the boundary of region of attraction(ROA)of the simpli-fied model is composed of stable manifolds of unstable equilibri-um point(UEP)or semi-singular point(SSP),named anchor points,and singular surface pieces.The type of anchor point de-termines the dominant instability pattern of the power system.When the anchor point is UEP or SSP,the dominant instability pattern is the instability of rotor angle of SG or the instability of phase-locked loop and outer control loop(OCL)of CIG,re-spectively.Transition of dominant instability pattern can be ana-lyzed with the relative position relationship between UEP and SSP.The effect of OCL is discussed.When the OCL is activat-ed,the ROA becomes smaller and the system is more prone to instability of CIG.It is necessary to consider the OCL when studying the large-disturbance stability of the power system.
Converter-interfaced generationlarge-distur-bance stabilityouter control loopphase-locked loopsynchro-nous generatorvoltage source converter
Lei Chen、Yong Min、Liangshuai Hao、Guangzheng Xing、Yalou Li、Shiyun Xu
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De-partment of Electrical Engineering,Tsinghua University,Beijing 100084,China
China Electric Power Research Institute,Beijing 100192,China
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