摘要
高渗透率分布式光伏接入配电网易造成电压越限,目前提出的电压控制方法普遍过于理论化,难以实用。为此,文中提出了一种实用型中压配电网无功电压控制技术:将每条馈线作为独立控制区域且只选择几个关键点,控制关键点的电压实现整条馈线的电压控制,从而减小电压控制的复杂度。提出"自然电压"的概念,将网损最小化转化为基于"自然电压"的目标函数,建立起节点电压和分布式光伏无功调节量之间的定量关系,使目标函数易于计算,并将约束条件转化为线性的且不再包含潮流方程,从而极大地减小了优化运算所需的信息量。文中所提方法能在较少信息基础上得到次优解,实用性强,最后的算例仿真证明了此方法的有效性。
High penetration PVs tend to bring overvoltage to distribution network,and many proposed methods are too theoretical,which make it difficult to be applied.Therefore,this paper proposes a practical voltage regulation technique for medium voltage distribution network,in which every feeder is treated as an independent control section and selects several critical nodes and achieve regulation of voltage along the feeder through regulation of critical nodes voltage,thereby simplifying voltage regulation.The natural voltage concept is proposed,and the power loss minimization is then converted into an objective based on natural voltage,and the relationship between node voltage and the reactive power of distributed PVs is established,which makes calculation of objective function very easy and converts constraints into linear ones with power flow equations excluded,thereby reducing greatly the information needed in optimization.The method proposed in this paper can get sub-optimal solution and is very practical,and the simulation result confirms the effectiveness of the proposed method.
作者
陆善婷
杨敏红
程军照
Lu Shanting;Yang Minhong;Cheng Junzhao(Engineering Practical Training Center,Shanghai University of Engineering Science,Shanghai 201620,China;Southern Urban Branch of State Grid Shanghai Electric Power Company,Shanghai 201100,China;Yunnan Power Grid Corporation,Kunming 650011,China)
出处
《电测与仪表》
北大核心
2019年第4期115-120,共6页
Electrical Measurement & Instrumentation
基金
上海工程技术大学实践教学建设自助项目(p201724005)
关键词
分布式光伏
配电网
电压控制
常量灵敏度
自然电压
distributed PV
distribution network
voltage regulation
constant sensitivity
natural voltage
