繼電保護裝置自取能電源供電異常分析及改進建議
李斌,尹良智,柳舟,徐崢,栗嬌雪,解東翰
(國網鞍山供電公司,遼寧 鞍山 114000)
摘 要:采用自供電即電流互感器自取能的微機保護裝置,在供電系統設計以及裝置可靠性上,存在著一定的安全隱患。結合具體事故案例,分析了高壓開關柜微機保護裝置供電系統存在的問題,根據現場運行情況,通過對比多種供電方案,提出一種外部雙電源交流不同源帶鉛酸蓄電池儲能裝置的供電方案,并對外部雙電源交流不同源帶儲能電源裝置的參數進行了計算,該供電解決方案經在實際裝置中應用表明,其運行工況滿足設備運行要求。
關鍵詞: 10 kV 配電網;微機保護裝置;CT 自取能電源;外部雙電源交流不同源帶儲能電源
中圖分類號:TM774 文獻標識碼:B 文章編號:1007-3175(2022)07-0040-05
An Analysis and Improvement Suggestions for the Abnormal Electrical
Power Supply of the Self-Power Supply Reply Protection Device
LI Bin, YIN Liang-zhi, LIU Zhou, XU Zheng, LI Jiao-xue, XIE Dong-han
(State Grid Anshan Electric Power Supply Company, Anshan 114000, China)
Abstract: It could be a potential safety hazard to use the microprocessor-based reply protection of the self-power supply current transformer in the design of the power system, and the device would be unreliable. This paper discussed specific cases and analyzed the existing problems of power supply of the microprocessor-based reply protection of the high-voltage switchgear. It elaborated the operation process,compared various power supply plans, and proposed a scheme of an external dual power AC different source with a lead-acid storage battery power supply. In addition, it calculated parameters of the external dual power supply AC different source energy storage power supply. The result shows that the solution meets the operational requirement.
Key words: 10 kV distribution network; microprocessor-based reply protection; CT self-power supply; external dual power supply AC different source energy storage power supply
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