• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2019, Vol. 40 ›› Issue (5): 78-89.doi: 10.3969/j.issn.1000-7229.2019.05.010

• 智能电网 • 上一篇    下一篇

挖掘光伏无功能力的配电网无功电压协调控制策略

吴晓飞1,戴晖1,黄晓剑2,杨萌2,刘皓明2   

  1. 1. 国网江苏省电力有限公司淮安供电分公司,江苏省淮安市 223001;2. 河海大学能源与电气学院,南京市 211100
  • 出版日期:2019-05-01
  • 作者简介:吴晓飞(1975),男,高级工程师,主要从事配电系统自动化的管理与研究工作; 戴晖(1984),男,硕士,工程师,主要从事配电网规划与建设工作; 黄晓剑(1994),男,硕士研究生,主要从事配电网无功优化等方面的研究工作; 杨萌(1996),女,本科生,主要从事配电网无功优化等方面的研究工作; 刘皓明(1977),男,博士,教授,主要从事配电系统自动化、分布式新能源发电等方面的研究工作。
  • 基金资助:
    国家电网公司科技项目(实现高比例光伏发电就地消纳的多层级配电网电压协同控制技术研究)

Coordinated Voltage Control Strategy of Distribution Network Considering PV's Reactive Power

WU Xiaofei1,DAI Hui1,HUANG Xiaojian2,YANG Meng2,LIU Haoming2   

  1. 1.Huai'an Power Supply Company, State Grid Jiangsu Electric Power Co., Ltd., Huai′an 223001, Jiangsu Province, China;2. College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China
  • Online:2019-05-01
  • Supported by:
    This work is supported by State Grid Corporation of China Research Program (Research on PV generation based reactive power control technology for local utilization of high penetration PV).

摘要: 在高渗透光伏接入多电压等级配电网中,针对低压分布式光伏无功能力没有被充分利用和高/中/低压配电网无功电压未整体协调优化的问题,提出了一种充分挖掘光伏无功能力的多电压层级配电网无功电压协调控制策略。在低压配电网中,对于暂不具备通信网络,无法实现统一调度的光伏逆变器,采用3种就地自主电压控制模式进行实时无功电压控制;在多电压层级配电网无功电压协调控制模型中,考虑包括具备通信网络的光伏逆变器在内的各种无功源,建立电压分区和主导节点选择模型,设计上层全局优化和下层分区优化的双层协调控制策略,该策略充分挖掘了光伏无功对配电网电压的调节能力,实现对整个配电网的无功电压精准控制。将所提策略应用于江苏某220 kV主变区域实际系统,验证了其无功电压控制和消纳光伏发电的优势。

关键词: 配电网, 光伏, 无功电压控制, 多电压层级

Abstract: With large-scale photovoltaic (PV) systems access to distribution network, a coordinated voltage control strategy considering PV converter's reactive power for distribution network with multiple voltage levels is proposed, which aiming at the problem that low-voltage distributed PV's reactive power is not fully utilized and reactive power and voltage in high and low voltage distribution network are not coordinated and optimized as a whole. In the low-voltage distribution network where communication network is not available and unable to achieve unified scheduling, three kinds of local autonomous voltage control modes are chosen to control the reactive power and voltage in real time. In the proposed reactive power and voltage coordinated control model for distribution network with multiple voltage levels, considering a variety of reactive power sources including PV inverters with communication networks, models for voltage partition and dominant node selection are established, and a two-layer coordination control strategy, including the upper global optimization and the lower subdivision optimization, is designed. This strategy fully mines the capability of PV converter's reactive power to adjust the voltage of the distribution network, and realizes the accurate control of reactive power and voltage. A practical example system, the distribution network supplied by Shuanglong 220 kV substation in Jiangsu Province, is used to verify the proposed strategy, and the results verify its advantages in reactive power and voltage control as well as the ability of accessing PV power.

Key words: distribution network, photovoltaic, reactive power and voltage control, multiple voltage levels

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