基于功率控制的含高渗透率户用光伏低压配电网电压控制策略  

Power control-based voltage control strategy of LV distribution network with high penetrations residential PVs

作　　者：伍惠铖 王淳[1] 尹发根[2] 陈宇杰 刘宽 WU Huicheng;WANG Chun;YIN Fagen;CHEN Yujie;LIU Kuan(Department of Electrical and Automatic Engineering,Nanchang University,Nanchang 330031,China;College of Physical Science and Engineering Technology,Yichun University,Yichun 336000,China)

机构地区：[1]南昌大学电气与自动化工程系,江西南昌330031 [2]宜春学院物理科学与工程技术学院,江西宜春336000

出　　处：《电力科学与技术学报》2020年第5期27-35,共9页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(51467012);国家国际科技合作专项(2014DFG72240)。

摘　　要：有载调压器(OLTC)和电容器组已被普遍用于处理含高渗透率户用光伏的低压配电网电压越限问题。控制策略的不同将直接影响到节点电压和OLTC分接头调节及电容器组投切次数。为寻求一种适合于解决低压配网电压越限问题的控制策略,在分析OLTC参考电压对电压控制策略影响的基础上,基于电压灵敏度矩阵理论,提出基于功率控制的电压控制策略。为同时考虑时序性和随机性对光伏出力和负荷的影响,该控制策略采用基于序贯蒙特卡罗模拟的概率潮流计算网络有功损耗和节点电压越限概率值。在算例中将该方法与基于时间控制的电压控制策略进行对比,结果表明,采用基于功率控制的电压控制策略,在有效降低网络电压越限概率的同时,还能有效减少分接头和电容器组动作次数,降低有功网损,有效提高低压配电网对高渗透率户用光伏发电接入的消纳能力。On-load tap changers(OLTC)and capacitor banks have been widely utilized to deal with the problem of voltage violation in low-voltage(LV)distribution networks with high-penetration photovoltaic(PV).Different control strategies would directly affect the node voltage and operation number of OLTC tap and capacitor bank.In order to seek a suitable control strategy for handling the voltage violation problem in LV distribution network,a power control-based(PCB)voltage control strategy is proposed on the basis of the analysis of the influence of OLTC reference voltage on the voltage control strategy and the voltage sensitivity matrix theory.In order to consider the influence of time sequence and randomness on PV output and load,probabilistic power flow based on sequential Monte Carlo simulation is utilized to calculate the probability values of network active power loss and node voltage violation probability.The proposed method is compared with the time control-based(TCB)strategy in the test case.It is shown that the TCB based on the power control not only reduce the node voltage violation probability effectively,but also effectively reduce the action times of taps and capacitor banks,reduce the active power loss,and improve the ability of low-voltage distribution network to absorb high-permeability household photovoltaic power generation.

关 键 词：低压配电网 有载调压器 电容器组 高渗透率 电压灵敏度 电压控制 

分 类 号：TM715[电气工程—电力系统及自动化]