含大规模风光电源的电网静态电压稳定性分析

赵会莹; 杨明玉

doi:10.16513/j.cnki.10-1427/tk.2017.05.007

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分布式能源 ›› 2017, Vol. 2 ›› Issue (5) : 41-46. DOI: 10.16513/j.cnki.10-1427/tk.2017.05.007

学术研究

含大规模风光电源的电网静态电压稳定性分析

赵会莹 ,
杨明玉

作者信息 +

Static Voltage Stability Analysis on Grid With Large Scale Wind and Photovoltaic Power

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文章历史 +

摘要

针对电压稳定评估指标从有功功率或无功功率单方面去评价而产生的结果差异问题，提出了一种用于分析大规模风电场、光伏电站接入电网后系统静态电压稳定性的综合评价指标。通过功率-电压曲线计算节点电压的有功灵敏度指标I_P，来研究风电场、光伏电站联合接入电网后的风光电源有功出力变化对系统电压稳定性的影响；通过计算含大规模风光电源的系统节点电压-无功灵敏度指标I_Q，来进行系统电压稳定性的评估；在这基础上，根据理想点法将这2种指标进行综合得到系统的综合评价指标I.利用评价指标I_P、I_Q、I对山西省实际电网的静态电压稳定性进行分析，判断出山西电网中电压相对薄弱节点和区域，并对这3个指标下的电网电压薄弱区域进行对比分析，验证了综合评价指标的全面性。

Abstract

The voltage stability index was merely established from the perspective of active power or reactive power, and it might generate different results. In order to solve the problem, this paper proposes an integrated voltage stability index to analyze the static voltage stability of the grid with large scale wind farm and photovoltaic plant connection. On one hand, it obtains the active sensitivity index IP of node voltage through power-voltage curve to study the impact of the active power change of wind-photovoltaic generation of the grid with wind farm and photovoltaic plant connection on the voltage stability of system. On the other hand, the node voltage reactive sensitivity index IQ of the grid with wind farm and photovoltaic plant connection is used in evaluating voltage stability of power system. On this basis, the integrated voltage stability index I is proposed by the integration of the above two indices based on ideal point method. We use the evaluation indexes IP, IQ and I to analyze the static voltage stability of the actual power grid in Shanxi province, which can identify the weak buses and areas of Shanxi grid. The comparison and analysis of the weak area of power grid under these three indexes verifies the comprehensiveness of the comprehensive evaluation index.

导出引用

赵会莹, 杨明玉. 含大规模风光电源的电网静态电压稳定性分析[J]. 分布式能源. 2017, 2(5): 41-46 https://doi.org/10.16513/j.cnki.10-1427/tk.2017.05.007

Huiying ZHAO, Mingyu YANG. Static Voltage Stability Analysis on Grid With Large Scale Wind and Photovoltaic Power[J]. Distributed Energy Resources. 2017, 2(5): 41-46 https://doi.org/10.16513/j.cnki.10-1427/tk.2017.05.007

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