分布式光伏并网系统中逆变器调压策略  

A Voltage Regulation Strategy of Inverters in Distributed Photovoltaic Grid-Connected System

作　　者：潘俊东[1] PAN Jun-dong(School of Information Science and Engineering, Central South University, Changsha 410083, China)

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《通信电源技术》2017年第4期53-55,共3页Telecom Power Technology

摘　　要：大规模分布式光伏电源的接入给配电网带来许多不良影响,如节点电压越限和功率因数劣化的问题。为减小分布式光伏对配电网的影响,并充分利用逆变器的无功调节能力,文章提出一种改进型分布式光伏系统逆变器无功控制策略,该策略在传统cosφ(P)和Q(U)控制策略的基础上,结合了两种策略的优点,同时兼顾控制节点电压和改善系统功率因数,实现了光伏系统的友好型并网。仿真验证了所提策略的准确性。The access to distribution network of large-scale distributed photovoltaic power brings many adverse effects,such as the node voltage over-limit and power factor degraded.In order to reduce the influence of distributed photovoltaic（PV）for distribution network,and make full use of inverter reactive power adjustment ability.A modified reactive power control strategy of inverter in distributed photovoltaic system is proposed in this paper.The strategy is on the basis of traditional cosφ（P）and Q（U）control strategy,combining the advantages of the two strategies,meantime taking into account the control node voltage and improving the power factor of the system,the friendly connection of the photovoltaic system is realized.The simulation proves the accuracy of the proposed strategy.

关 键 词：分布式光伏 配电网 无功控制 功率因数 

分 类 号：TM464[电气工程—电器] TM615