考虑全局相关性的主动配电网电压安全优化控制  

Optimization and Control of Voltage Security in Active Distribution Network Considering Global Correlation

作　　者：陈中[1] 顾叮咚 郭庆 CHEN Zhong;GU Dingdong;GUO Qing(School of Electrical Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学电气工程学院,江苏省南京市210096

出　　处：《电力系统自动化》2023年第21期99-107,共9页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(52077035)。

摘　　要：新型电力系统下,配电网侧规模化分布式新能源的不确定性使得电压安全问题日益突出,现有方法主要假设随机变量为独立分布,较少考虑随机分布间的相关性,而配电网侧随机量的相关性较强,降低了电压控制效果。文中提出了一种考虑全局灵敏度的主动配电网电压稳定优化控制策略。首先,采用L指标衡量系统的电压稳定程度,构建了考虑多场景电力系统稳定性的概率潮流模型。其次,基于Sobol’法的全局灵敏度定量分析了输入变量的不确定性及变量间的相关性对电压稳定的影响。然后,基于灵敏度分析结果,优化求解系统中的调控设备。最后,在修改后的IEEE 33节点系统、IEEE 118节点系统及实际系统中进行仿真。结果表明,基于全局灵敏度提出的多随机性场景优化控制策略能在考虑多变量相关性的同时,实现调控设备在不同运行场景下的高效利用,支撑有源配电网安全运行。In the new power system,the uncertainty of large-scale distributed renewable energy on the distribution network side makes the security problems of voltage increasingly prominent.The existing methods mainly assume that the random variables follow independent distribution,and seldom consider the correlation between random distributions.However,the correlation of random variables on the distribution network side is strong,which reduces the voltage control effect.An optimization and control strategy of voltage stability in active distribution network considering global sensitivity is proposed.Firstly,L index is used to measure the voltage stability of the system,and a probabilistic power flow model considering the stability of power systems in multi-scenarios is constructed.Secondly,based on the global sensitivity of Sobol’method,the influence of uncertainty of input variables and correlation between variables on voltage stability is quantitatively analyzed.Then,based on the results of sensitivity analysis,the control equipment in the solution system is optimized.Finally,the simulation is carried out in the modified IEEE 33-bus system,IEEE 118-bus system and actual system.The results show that the optimization and control strategy in multistochastic scenarios based on global sensitivity can realize the efficient utilization of the control equipment in different operation scenarios and support the safe operation of the active distribution network while considering the multi-variable correlation.

关 键 词：主动配电网 不确定性 Sobol’法 电压稳定 优化控制 

分 类 号：TM73[电气工程—电力系统及自动化]