低压配电网消纳分布式光伏的控制策略及性能分析
摘要:针对低压配电网分布式光伏渗透率日益提高的现状，对提升光伏消纳能力的控制策略进行研究和详细仿真分析。基于Matlab/Simulink环境搭建含分布式光伏及分布式储能的低压配电网模型。考虑电压偏差、网损、功率因数等方面，对逆变器无功控制、储能系统有功控制2种消纳策略的控制效果进行了对比分析，研究结果表明：低压配网中基于光伏逆变器的无功控制策略对电压的调节能力有限，造成网损和功率因数指标劣化；而基于储能的有功控制策略能相对有效调节电压、优化网损，但是单纯的有功控制对储能容量的需求较大，也不利于优化网络功率因数。在此基础上，提出一种逆变器无功与储能有功相协调的控制策略，仿真结果表明，有功无功协调控制能有效调节网络电压，综合优化电网技术指标，并能降低对储能容量的要求。
Abstract：For the status of rapidly increasing distributed photovoltaic (PV) penetration in low voltage distribution network (LVDN), several strategies that enhance the PV consumption ability in LVDN are researched and analyzed in detail. Distributed PV and distributed energy storage system (ESS) in LVDN are modeled in Matlab/Simulink platform. Moreover, control effectiveness on voltage deviation, power loss and power factor under the two strategies that are based on PV inverter reactive power and ESS active power respectively is analyzed and compared. The research results indicate that the voltage regulation ability under reactive power control strategy based on PV inverter is limited in LVDN, and the power loss and power factor are negatively affected under the strategy; the active power control based on ESS can regulate voltage relative effectively and optimize power loss, but the active power control require ESS has a large capacity, and it is not conducive to optimizing power factor. Based on this, a coordinated control strategy with inverter reactive power and ESS active power is proposed. The simulation results show that the coordinated control strategy can regulate voltage efficiently and has the better comprehensive optimal results. Meanwhile, it can maximize the use of PV inverter reactive power capability, and reduce the ESS capacity requirements.
标题：低压配电网消纳分布式光伏的控制策略及性能分析
title:Distributed PV Consumption Control Strategy and Performance Analysis in Low Voltage Distribution Network
作者：唐巍, 蔡永翔, 李天锐, 徐鸥洋
authors:TANG Wei,CAI Yongxiang,LI Tianrui,XU Ouyang
关键词：低压配电网,分布式光伏,逆变器无功调节,储能调度,有功无功协调,
keywords:low voltage distributed network,distributed photovoltaic,inverter reactive power regulation,storage dispatch,coordinated active and reactive power,
发表日期：2019-01-25
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