基于可变功率和阻抗平抑主动配电网母线电压偏差方法研究  

Research on restraint of bus voltage deviation in active distribution network based on variable power and impedance

作　　者：黄利军[1] 王雷涛[1] 李献伟[1] 盛京格 白贯雨 Huang Lijun;Wang Leitao;Li Xianwei;Sheng Jingge;Bai Guanyu(XJ Group Corporation, Xuchang, He’nan 461000)

机构地区：[1]许继集团有限公司,河南许昌461000

出　　处：《电气技术》2018年第5期26-32,38,共8页Electrical Engineering

摘　　要：针对分布式电源、柔性负荷接入主动配电网渗透率的不断提高和电力用户对电能质量日益苛刻的需求,本文提出一种基于可变功率和阻抗平抑主动配电网电压偏差的方法。该方法对主动配电网负荷端母线电压正向偏差和负向偏差进行分析,当正向偏差超出允许值时,通过投入柔性负荷,改变负荷总功率,平抑电压偏差;若投入柔性负荷不能平抑电压正向偏差至允许的范围,则进一步通过降低分布式电源的输出功率平抑电压正向偏差;当电压负向偏差超出允许值时,通过增大分布式电源的输出功率平抑电压偏差;若分布式电源的输出功率不能平抑电压负向偏差至允许的范围,则进一步投入阻抗可调的柔性线路,通过改变输电线路总阻抗,平抑母线电压负向偏差。为验证所提方法,以分布式电源、柔性负荷和柔性线路接入配电网为例,搭建Matlab/Simulink仿真模型,计算结果表明该方法可行有效。In respect to continualimprovement of distributed generation and flexible loadpermeability in active distribution network and increasingly higher demands of power consumers about power quality, a method that is used to restrain voltage deviation of active distribution network based on variable power and impedance is given in this paper. Positive deviation and negative deviation of load side bus voltage in active distribution network are analyzed by this method. When voltage positive deviation exceeds allowable value, load total power is changed through putting into flexible load which can restrain voltage deviation. If voltage positive deviation can not be restrained in allowable scope through flexible load, voltage positive deviation is restrained through further reducing output power of distributed generation. When voltagenegative deviation exceeds allowable value, voltage deviation is restrained through enlarging output power of distributed generation. If voltage negative deviation can not be restrained in allowable scope through output power of distributed generation, total impedance of transmission line is changed through putting into flexible line of controllable impedancewhich can restrain negative deviation of bus voltage. In order to verify proposed method, taking distributed generation, flexible load and flexible line those are connected to active distribution network for example, the Matlab/Simulink simulation model is built. Simulation results show that proposed method is feasible and effective.

关 键 词：主动配电网 电压偏差 分布式电源 柔性负荷 柔性线路 

分 类 号：TM727[电气工程—电力系统及自动化]