分布式電源接入對配電網(wǎng)線路保護的影響及對策研究
荊江平
江蘇省電力公司鎮(zhèn)江供電公司，江蘇 鎮(zhèn)江 212004
摘 要：含分布式電源并網(wǎng)的配電網(wǎng)發(fā)生短路故障時，流經(jīng)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(dǎo)致線路電流保護的誤動或者拒動?；贗EEE33節(jié)點配電系統(tǒng)，在PSASP平臺上搭建了仿真模型，計算了多個故障點下流經(jīng)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(qū)域影響結(jié)論，并給出了幾種減小影響的措施。
關(guān)鍵詞：分布式電源；配電網(wǎng)；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
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