摘要
分析了光伏发电对保护、重合闸的影响。为了防止光伏电源提供的反向电流引起的拒动、误动,给出了保护整定电流应满足的条件。在传统保护配置的基础上提出了2种含光伏发电并网的馈线保护新方案:方案1根据光伏电源接入位置的不同,配置方向纵联保护并引入反时限过电流保护形式,电源输出功率变化时故障也能被可靠切除;方案2在方向电流保护的基础上,将光伏发电上游每条馈线保护的Ⅰ段与其下一级馈线保护的Ⅰ段构成通信单元,依据新整定原则及2级保护动作结果进行综合判断,将故障快速地隔离在最小范围内。通过一个10 kV配电系统,验证了保护方案的有效性。
The impact of grid-connected photovoltaic power generation on protection and reclose is analyzed and the setting current of protection is given for preventing it from improper operations caused by the reverse current from photovoltaic power generation system. Based on the traditional protection configuration, two feeder protection schemes are proposed for the distribution network including photovohaic power generation system. Scheme 1 ：the directional pilot protection and the inverse-time over-current protection are configured according to the grid-connection location of photovoltaic power generation system,which can switch out the fault reliably when the output power changes. Scheme 2：based on the directional current protection,the section I of each feeder protection at the level higher than the photovohaic system and the section I of the feeder protection at lower level are included in a communication unit and the fault is rapidly isolated in the smallest area by the protection according to the new setting principle and the operating results of two-stage protection. Simulative results for a 10 kV distribution system have verified the validity of the proposed schemes.
出处
《电力自动化设备》
EI
CSCD
北大核心
2013年第4期12-17,23,共7页
Electric Power Automation Equipment
关键词
光伏
发电
并网
继电保护
重合闸
模型
photovohaic
electric power generation
grid connection
relay protection
reclose
models
作者简介
李斌（1971-），男，河南孟州人，副教授，博士研究生，研究方向为电力系统继电保护、可再生能源发电技术（E-mail：Bin_li920723@163．com）；
袁越（1966-），男，陕西西安人，教授，博士研究生导师，博士，研究方向为电力系统优化运行、电力系统稳定分析与控制、电力经济技术与运营管理。
