核電站500 kV線路故障測距算法的優(yōu)化與應用
段琰璞，沈紅
(國核示范電站有限責任公司，山東 榮成 264300)
摘 要：目前采用的故障測距算法不適用于帶并聯(lián)電抗器的場景，測距誤差較大，線路故障排查時間過長，進而影響核電站機組穩(wěn)定運行。對現(xiàn)有算法進行了優(yōu)化，提出一種適用于并聯(lián)電抗器的新算法，指出存在偽根的可能性，并提出了剔除偽根的原則，得到正確的故障距離，達到精確故障定位的目的。結(jié)合核電站 500 kV 線路實際電網(wǎng)模型，對各種類型的故障進行了仿真驗證，仿真結(jié)果顯示優(yōu)化后算法具有較好的定位精度和準確剔除偽根的能力，最大誤差僅為 0.730%，滿足工程現(xiàn)場需求。
關鍵詞：核電站；500 kV 線路；并聯(lián)電抗器；故障測距算法
中圖分類號：TM623 文獻標識碼：B 文章編號：1007-3175(2021)10-0031-04
The Optimization and Application of 500 kV Line Fault
Location Algorithm in Nuclear Power Plant
DUAN Yan-pu, SHEN Hong
（State Nuclear Power Demonstration Plant Co., Ltd, Rongcheng 264300, China）
Abstract: The current fault location algorithm is not suitable for the scene with a shunt reactor. The inaccuracy of measurement could be an obstacle for troubleshooting and then affects the stable operation of nuclear power station units.This paper pointed out the possibility of pseudo-root in the algorithm, proposed a principle of pseudo-root scalping. By using this principle, the obtained fault distance could improve the accuracy of fault location.This work combined with the actual power grid model of 500 kV line in nuclear power plant, various types of failures is simulation verified. The simulation results showed that the optimized algorithm has good positioning accuracy and well ability to eliminate pseudo roots. In experiments, the maximum error is only 0.730%, which can meet the needs of the project site.
Key words: nuclear power plant; 500 kV line; shunt reactor; fault location algorithm
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