分布式電源接入對配電網線路保護的影響及對策研究
荊江平
江蘇省電力公司鎮江供電公司，江蘇 鎮江 212004
摘 要：含分布式電源并網的配電網發生短路故障時，流經保護的短路電流會受到分布式電源提供的助增電流、汲取電流或反方向電流的影響，導致線路電流保護的誤動或者拒動。基于IEEE33節點配電系統，在PSASP平臺上搭建了仿真模型，計算了多個故障點下流經保護的短路電流大小，分析了分布式電源不同接入容量和位置對線路電流保護的影響，得出了對保護的分區域影響結論，并給出了幾種減小影響的措施。
關鍵詞：分布式電源；配電網；電流保護；短路電流；對策
Impact of Grid-Connected Distributed Generation on Distribution Network Line Protection and Its Countermeasure
JING Jiang-ping
Zhenjiang Power Supply Company of Power Company in Jiangsu, Zhenjiang 212004, China
Abstract: When the short-circuit fault occurs at the distribution network connected with distributed generation (DG), the short-circuit current in protection equipment will be affected by the increasing flow, decreasing flow and opposite direction flow of the distributed generation, to cause the misoperation or failure action of current protection. Based on the IEEE33-node distribution system, the simulation model was built on PSASP platform. This paper calculated the short-circuit current through the protection in the case of multiple fault points and analyzed the influence of different capacity and position of DG on the current protection. The effect to the region of protection is concluded and several methods to lower the influence are proposed.
Key words: distributed generation; distribution network; current protection; short-circuit current; countermeasure
參考文獻
[1] 馮希科，邰能靈，宋凱，等.DG容量對配電網電流保護的影響及對策研究[J].電力系統保護與控制，2010，38(22)：156-160.
[2] 孫鳴，趙月靈，王磊.DG容量及接入方式對變電站繼電保護定值的影響[J].電力自動化設備，2009，29(9)：46-49.
[3] 胡成志，盧繼平，胡利華，等.分布式電源對配電網繼電保護影響的分析[J].重慶大學學報：自然科學版，2006，29(8)：36-39.
[4] 林霞，陸于平，吳新佳.分布式發電系統對繼電保護靈敏度影響規律[J].電力自動化設備，2009，29(1)：54-59.
[5] 叢偉，潘貞存，王成山，等.含高滲透率DG的配電系統區域縱聯保護方案[J].電力系統自動化，2009，33(10)：81-85.
[6] 李乃永，梁軍，趙義術，等.考慮分布式電源隨機性的配電網保護方案[J].電力系統自動化，2011，35(19)：33-38.
[7] 余瓊，余勝，李曉暉.含分布式電源的配網自適應保護方案[J].電力系統保護與控制，2012，40(5)：110-115.
[8] 孫景釕，李永麗，李盛偉，等. 含分布式電源配電網的快速電流保護方案[ J ] . 天津大學學報，2010，43(2)：102-108.
[9] Silva J A, Funmilayo H B, Butler-Purry K L.Impact of Distributed Generation on the IEEE34 Node Radial Test Feeder with Overcurrent Protection[C]//Power Symposium, 2007.NAPS＇07.39th North American, 2007.
[10] Yazdanpanahi H, Li Yun wei, Xu Wilsun.A New Control Strategy to Mitigate the Impact of Inverter-Based DGs on Protection System[J].IEEE Transactions on Smart Grid, 2012，3(3)：1427-1436.
[11] Agheli A, Abyaneh H A, Chabanloo R M, et al.Reducing the Impact of DG in Distribution Networks Protection Using Fault Current Limiters[C]//The 4th International Power Engineering and Optimization Conference，2010.
