基于区间-概率潮流分析的配电网调压手段适应性评估方法

An adaptability evaluation method for voltage regulation measures in distribution networks based on interval and probability power flow analysis

随着可再生能源的大规模接入,配电网面临着频繁的电压越限问题,亟待对以光伏逆变器为代表的多种新型调压手段能否满足配电网日常调压需求进行研究。为对配电系统调压手段适应性做出客观评价,提出基于区间-概率潮流分析的配电网调压手段适应性评估方法,实现调压效果与调压成本的综合分析。首先,基于区间潮流与概率潮流结果,构建配电网调压效果评价指标;其次,以最优无功方案对应成本作为成本基准值,构建配电网调压成本评价指标;在此基础上,基于层次分析法对调压效果指标和成本指标进行加权,构建配电网调压适应性综合评价指标体系;最后,基于所构建的评价指标,完成配电网调压手段适应性分析,并通过多场景对比评价验证了所提方法的合理性。

With the large-scale integration of renewable energy,distribution networks are faced with frequent volt-age limit violations.In response to this challenge,it is urgent to study whether new voltage regulation measures,rep-resented by photovoltaic inverters,can meet the daily voltage regulation needs of distribution networks.To objec-tively evaluate the adaptability of voltage regulation measures in distribution systems,a method based on interval and probability power flow analysis is proposed.This method enables a comprehensive analysis of voltage regulation effectiveness and cost.Firstly,based on the results of interval and probability power flow,indicators for voltage regulation effectiveness evaluation in distribution networks are constructed.Secondly,the corresponding cost of the optimal reactive power scheme is used as the cost benchmark value to construct the evaluation index of the voltage regulation cost of the distribution network.On this basis,the analytic hierarchy process(AHP)is employed to weight the effectiveness and cost indicators and thus establish a comprehensive evaluation indicator system for volt-age regulation adaptability in distribution network.Finally,based on the constructed evaluation indicators,adapt-ability analysis of voltage regulation measures in distribution networks is conducted.The rationality of the proposed method is validated through comparative evaluations under multiple scenarios.