| 引用本文: | 李斌,袁越.光伏并网发电对保护及重合闸的影响与对策[J].电力自动化设备,2013,33(4): |
| LI Bin,YUAN Yue.Impact of grid-connected photovoltaic power generation on protection andreclose，and its countermeasures[J].Electric Power Automation Equipment,2013,33(4): |
|
| 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。 |
| 关键词: 光伏 发电 并网 继电保护 重合闸 模型 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Impact of grid-connected photovoltaic power generation on protection andreclose，and its countermeasures |
|
LI Bin1,2, YUAN Yue1
|
|
1.College of Energy and Electrical Engineering，Hohai University，Nanjing 210098，China;2.Hydroelectric Engineering Department，Qinghai University，Xining 810016，China
|
| Abstract: |
| 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 photovoltaic 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 photovoltaic system and the sectionⅠof 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. |
| Key words: photovoltaic electric power generation grid connection relay protection reclose models |
