分布式光伏接入的配电网规划综合评价方法  

Comprehensive Evaluation Method of Distribution Network Planningfor Distributed Photovoltaic Access

作　　者：鲁晓秋 叶影 曹春 孟建辉[2] 汤衡 何军 LU Xiaoqiu;YE Ying;CAO Chun;MENG Jianhui;TANG Heng;HE Jun(State Grid Shanghai Jinshan Electric Supply Company,Shanghai 200540,China;School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China)

机构地区：[1]国网上海金山供电公司,上海200540 [2]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2024年第3期74-82,100,共10页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金青年科学基金资助项目(51807064);国网上海市电力公司科技项目(520932200087).

摘　　要：为充分考虑分布式光伏接入对配电网规划评价的影响,基于传统配电网的规划评价体系,提出一种计及光伏输出功率随机性和相关性的有源配电网规划评价方法。首先,为精准刻画光伏出力的随机性与波动性,提出基于改进最优粒子群算法的高斯混合模型,计算多个光伏出力的联合概率密度函数;然后,将潮流方程线性化,推导节点电压和线路潮流线性表达式,分别获取多节点电压和多线路潮流的联合概率分布,并基于此构建考虑光伏接入后的配电网可靠性指标和电压质量指标等。最后,将新构建的电压越限风险指标、电压偏差指标以及潮流断面越限风险指标等新型电网规划评价指标纳入评估体系中,采用层次分析法计算得到组合权重并组合得到最终综合评价结果。仿真结果验证了该评价方法的有效性。In order to fully consider the impact of distributed photovoltaic access on the safe operation of distribution network,an active distribution network planning evaluation method was proposed based on the traditional distribution network planning evaluation system,taking into account the randomness and correlation of photovoltaic output power.Firstly,the Gaussian mixture model(GMM)of improved optimal particle swarm optimization algorithm was proposed to solve the joint probability density function of multiple photovoltaic output,so as to accurately describe the randomness and volatility of photovoltaic output.Secondly,the power flow equation was linearized,the linear expressions of node voltage and line power flow were derived,and the joint probability distributions of multi-node voltage and multi-line power flow were obtained respectively.Based on this,the reliability index and voltage quality index considering distributed renewable energy access were constructed.Finally,the new power grid planning evaluation indicators such as the newly constructed voltage out-of-limit risk indicators,voltage deviation indicators,and power flow cross-section out-of-limit risk indicators were incorporated into the evaluation system,the combination weight was calculated by the AHP and combined to obtain the final comprehensive evaluation result.The simulation results verify the effectiveness of the evaluation method.

关 键 词：配电网规划评价 综合评价指标体系 电压分布指标 高斯混合模型 最优粒子群算法 层次分析法 

分 类 号：TM715[电气工程—电力系统及自动化]