分布式光伏电源并入配电网的故障分析及保护研究
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摘要
随着分布式光伏发电技术的不断成熟和迅速发展,大量逆变型分布式光伏电源接入配电网,使配电网结构和潮流分布变得更加复杂,传统保护配置策略受到较大冲击和影响,甚至对系统的安全稳定运行造成破坏。为解决逆变型分布式光伏电源接入配电网的保护配置难题,从光伏发电原理、含逆变型分布式光伏电源配电网的故障特性两个方面,对含逆变型分布式光伏电源的配电网继电保护配置策略进行了分析和研究,并通过仿真验证了新的保护策略完全符合配电网继电保护要求。
With the continuous maturity and rapid development of inverter-inetrfaced distributed generator(IIDG) technology, a large number of IIDG is connected to the distribution network, which makes the structure and power flow distribution of the distribution network become more complex. The traditional protection configuration strategy is greatly impacted and affected, and even causes damage to the safe and stable operation of the system. In order to solve the problem of protection configuration of inverted distributed photovoltaic power supply connected to distribution network, the relay protection configuration strategy of distribution network with inverted distributed photovoltaic power supply was analyzed and studied from two aspects:the principle of photovoltaic power generation and the fault characteristics of distribution network with inverted distributed photovoltaic power supply.The simulation results show that the new protection strategy fully conforms to the relay protection of distribution network requirement.
With the continuous maturity and rapid development of inverter-inetrfaced distributed generator(IIDG) technology, a large number of IIDG is connected to the distribution network, which makes the structure and power flow distribution of the distribution network become more complex. The traditional protection configuration strategy is greatly impacted and affected, and even causes damage to the safe and stable operation of the system. In order to solve the problem of protection configuration of inverted distributed photovoltaic power supply connected to distribution network, the relay protection configuration strategy of distribution network with inverted distributed photovoltaic power supply was analyzed and studied from two aspects:the principle of photovoltaic power generation and the fault characteristics of distribution network with inverted distributed photovoltaic power supply.The simulation results show that the new protection strategy fully conforms to the relay protection of distribution network requirement.
引文
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[11]S.Alepuz,S.Busquets-Monge,Control strategies based on symmetrical components for grid-connected converters under voltage dips[J].IEEE Transactions on Industry Electronics,2009,56(6):2162-2173.
[12]陶顺,郭静,等.基于电流保护原理的DG准入容量与并网位置分析[J].电网技术,2012,36(1):265-231.
[2]秦睿,董开松,汪红燕,杨萍,等.大规模光伏电站集中并网对电网的影响分析及对策[J].电气自动化,2014,36(3):57-59.
[3]雷一,赵争鸣.大容量光伏发电关键技术与并网影响综述[J].电力电子,2010,9(03):16-23.
[4]陈炜,艾欣,吴涛,等.光伏并网发电系统对电网的影响研究综述[J].电力自动化设备,2013,33(2):26-32.
[5]艾欣,韩晓男,孙英云.光伏发电并网及其相关技术发展现状与展望[J].现代电力,2013,30(1):1-7.
[6]HnnuFaakkoLaaksonen,Protectionpriciplesfro future microgrids,IEEE Transactions on Power Electronsics,2010,25(12):2910-2919.
[7]Manish Kumar Singh,Parne Naveen Reddy,A Fast Adaptive Protection Scheme for Distributed Generation Connected Networks with Necessary Relay Coordination,SCES,2013:1-5.
[8]梁才浩,段献忠.分布式发电及其对电力系统的影响[J].电力系统自动化,2001(2):53-57.
[9]马静,王希,等.含分布式电源的配电网自适应保护新方法[J].电网技术,2011,35(10):204-209.
[10]张惠智.逆变型分布式电源接入配电网的故障分析及保护原理的研究[D].天津:天津大学,2015.
[11]S.Alepuz,S.Busquets-Monge,Control strategies based on symmetrical components for grid-connected converters under voltage dips[J].IEEE Transactions on Industry Electronics,2009,56(6):2162-2173.
[12]陶顺,郭静,等.基于电流保护原理的DG准入容量与并网位置分析[J].电网技术,2012,36(1):265-231.