Suzhou Electric Appliance Research Institute
期刊號(hào): CN32-1800/TM| ISSN1007-3175

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繼電保護(hù)裝置自取能電源供電異常分析及改進(jìn)建議

來源:電工電氣發(fā)布時(shí)間:2022-07-18 14:18 瀏覽次數(shù):440

繼電保護(hù)裝置自取能電源供電異常分析及改進(jìn)建議

李斌,尹良智,柳舟,徐崢,栗嬌雪,解東翰
(國網(wǎng)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(jī)保護(hù)裝置,在供電系統(tǒng)設(shè)計(jì)以及裝置可靠性上,存在著一定的安全隱患。結(jié)合具體事故案例,分析了高壓開關(guān)柜微機(jī)保護(hù)裝置供電系統(tǒng)存在的問題,根據(jù)現(xiàn)場(chǎng)運(yùn)行情況,通過對(duì)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(chǔ)能裝置的供電方案,并對(duì)外部雙電源交流不同源帶儲(chǔ)能電源裝置的參數(shù)進(jìn)行了計(jì)算,該供電解決方案經(jīng)在實(shí)際裝置中應(yīng)用表明,其運(yùn)行工況滿足設(shè)備運(yùn)行要求。
    關(guān)鍵詞: 10 kV 配電網(wǎng);微機(jī)保護(hù)裝置;CT 自取能電源;外部雙電源交流不同源帶儲(chǔ)能電源
    中圖分類號(hào):TM774     文獻(xiàn)標(biāo)識(shí)碼:B     文章編號(hào):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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