| 引用本文: | 黄大为,潘 波.考虑DG接入位置和容量的配电网保护综合改进方案[J].电力系统保护与控制,2016,44(17):64-70.[点击复制] |
| HUANG Dawei,PAN Bo.Improved methods of distribution network protection scheme considering connection locations and capacity of DG[J].Power System Protection and Control,2016,44(17):64-70[点击复制] |
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| 摘要: |
| 为了解决分布式电源(distributed generations，DG)接入配电网后引起的传统配电网继电保护拒动、误动、灵敏度降低等问题，提出一种适应DG大量接入配电网的改进保护方案。从DG接入位置和容量角度，分析接入母线和馈线对传统配电网三段式电流保护和反时限过电流保护的影响，并计算传统配电网三段式电流保护允许接入容量。通过配置低电压加速反时限过电流保护，以及加装少量方向元件对传统配电网继电保护进行改进来满足含大量DG的配电网保护要求。利用PSCAD/EMTDC对含DG的10 kV配电系统进行了仿真分析，仿真结果表明，该改进方法能够满足不同容量的DG接入配电网保护要求，具有很好经济性和实用性，符合我国当前配电网发展现状。 |
| 关键词: 分布式电源 配电网 接入位置 三段式电流保护 低电压加速反时限过电流保护 |
| DOI：10.7667/PSPC151584 |
| 投稿时间：2015-07-31修订日期：2016-01-25 |
| 基金项目:吉林省科技厅科技发展规划项目(20130102026JC) |
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| Improved methods of distribution network protection scheme considering connection locations and capacity of DG |
| HUANG Dawei,PAN Bo |
| (School of Electrical Engineering, Northeast Dianli University, Jilin 132000, China) |
| Abstract: |
| When distributed generations are connected into distribution network, it will bring about many problems in traditional distribution network, such as protective relays refusing to operate, mal-operation, de-sensitivity, etc. Therefore, an improved protection scheme adapt to mass DG access to distribution network is put forward. From the perspective of DG connecting location and capacity, the impact of connected bus and feeder on traditional three-stage current protection and inverse-time over-current protection is analyzed, and the allowed accessing capacity of three-stage current protection is calculated. Verse-time over-current protection based on low voltage acceleration and a few directional components are configured to meet the protection requirements of the distribution network with mass DG. A 10 kV distribution system with DG is simulated and analyzed by PSCAD/EMTDC. Simulation results show that the improved method can meet protection requirements of distribution network with different capacity DG access, has good economy and practicality, and confirms to the development status of current distribution network. |
| Key words: DG distribution network connection location three-section current protection UAITOC |
