文章摘要
朱雪琼,薛禹胜,黄天罡.主导互补群的群内非同调性影响稳定裕度的途径[J].电力系统自动化. DOI: 10.7500/AEPS20190615001.
ZHU Xueqiong,XUE Yusheng,HUANG Tiangang.Approach of Non-coherence Within Dominant Complementary-cluster Affecting Stability Margin[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20190615001.
主导互补群的群内非同调性影响稳定裕度的途径
Approach of Non-coherence Within Dominant Complementary-cluster Affecting Stability Margin
DOI:10.7500/AEPS20190615001
关键词: 扩展等面积准则(EEAC)  暂态能量  稳定裕度  稳定性的机理分析  群内的非同调程度
KeyWords: extended equal area criterion (EEAC)  transient energy  stability margin  mechanism analysis of stability  degree of non-coherence within the cluster
上网日期:2019-07-09
基金项目:国家电网公司总部科技项目“能源转型中电网主动支撑研究的理论准备”(5100-201940398A-0-0-00)
作者单位E-mail
朱雪琼 东南大学电气工程学院 zhuxueqiong@sgepri.sgcc.com.cn 
薛禹胜 南瑞集团有限公司(国网电力科学研究院有限公司) xueyusheng@sgepri.sgcc.com.cn 
黄天罡 南瑞集团有限公司(国网电力科学研究院有限公司) huangtiangang@sgepri.sgcc.com.cn 
摘要:
      数值积分技术可以定性地分析电力系统的模型及扰动场景(统称为参量)对稳定性的影响,但既难以量化其影响程度,又无法揭示相应的机理。扩展等面积准则(EEAC)通过在高维空间中对仿真轨迹的模式解耦,及对时变单机映象系统能量演变的分析,可以量化对应案例的稳定性。在以映象转子角为横轴、以映象功率为纵轴的平面上,可以用适当的面积来量化映象系统的稳定裕度(η),进而揭示群内非同调性影响η的途径及机理。据此,文中从能量的视角出发,揭示了能域中的η及其各组分与时域中的群内非同调性之间的相关性,并通过仿真算例分别显示了群内分离型及相趋型的非同调对η影响的复杂性。
Abstract:
      The influence of the model and the disturbance scene (collectively termed as parameters) of the power system on the stability can be qualitatively analyzed based on numerical integration technique. However, its influence is difficult to be quantified and the corresponding mechanism is hard to be revealed. The extended equal area criterion (EEAC) quantifies the stability of the corresponding case by decoupling the simulated trajectories in high-dimensional space and analyzing the energy evolution of the time-varying one-machine infinite-bus (OMIB) image system. On the plane with the image rotor angle as the horizontal axis and the image power as the vertical axis, the stability margin of the image system can be quantified with the appropriate area. And then the approach and mechanism of the non-coherence within the cluster induced stability margin can be revealed. Based on this, the paper reveals the correlations between stability margin and its components in the energy domain and the non-coherence within the cluster in the time domain from the perspective of energy. The simulation results indicate the complexities of the influence of power angle divergence or approaching non-coherence within the cluster on the stability margin.
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