PDF(511 KB)
PDF(511 KB)
PDF(511 KB)
于不确定性的线路退运模糊潮流计算
Fuzzy Power Flow Calculation of Line Returned Based on Uncertainties
电力系统中存在着诸多不确定性因素,考虑不确定性因素的影响对线路重要性的评估有重要的意义。应用模糊集理论,在计及发电机出力及负荷不确定性的基础上,提出了线路退运后的模糊潮流计算方法。发电机出力、发电机可用度及负荷的不确定性用梯形模糊数描述,结合断线分析快速模拟算法中的灵敏度法,求解出单一线路退运后潮流的可能性分布,证实了在线路退运分析中计及不确定性的必要性和提出方法的应用价值。最后给出了IEEE-30节点系统的计算结果。
There are many uncertainties in the power system, which have profound significance on the evaluation of lines’ priority. With the application of fuzzy set theory, the fuzzy calculation method of power flow after line returned is proposed, by taking generator output and load uncertainties into account. The generator output, generator availability and load uncertainties are described by the trapezoidal fuzzy numbers. Combined with the sensitivity-based approach of the existing fast algorithm, the possible flow distribution after the line returned is obtained. Then the necessity of considering the uncertainties in the analysis of the system state when line returned and the value of the approach introduced in this paper are verified. Finally, the calculation result of IEEE-30 bus system is provided.
不确定性 / 模糊数 / 退运 / 灵敏度 / 电力系统潮流
uncertainty / fuzzy number / line returned / sensitivity / power flow
国家电网公司大电网重大专项资助项目课题(SGCC-MPLG029-2012)。
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