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摘要:電力系統(tǒng)繼電保護(hù)是保證電力系統(tǒng)安全穩(wěn)定運(yùn)行、限制電力系統(tǒng)大面積停電事故最基本和最有效的技術(shù)手段。零序電流保護(hù)廣泛地作為電力系統(tǒng)接地短路的保護(hù)，根據(jù)接地短路時(shí)零序電流的出現(xiàn)和大小作為故障特征量，變壓器接地方式、非全相運(yùn)行、單相自動(dòng)重合閘等因素對(duì)零序電流保護(hù)的運(yùn)行產(chǎn)生重要的影響，必要時(shí)需要采取相應(yīng)閉鎖裝置。 本設(shè)計(jì)根據(jù)繼電保護(hù)裝置在電力系統(tǒng)中的應(yīng)用，介紹了220kV電網(wǎng)繼電保護(hù)的零序電流保護(hù)的整定設(shè)計(jì)。 設(shè)計(jì)過程如下，首先對(duì)電力系統(tǒng)網(wǎng)絡(luò)的參數(shù)進(jìn)行計(jì)算，繪制出各序序網(wǎng)圖，然后選擇合理的運(yùn)行方式，計(jì)算各母線發(fā)生各種金屬性短路故障時(shí)通過線路保護(hù)裝置的短路電流，根據(jù)所得數(shù)據(jù)及所選的運(yùn)行方式選擇最佳的配合保護(hù)，并對(duì)各保護(hù)進(jìn)行分析和整定計(jì)算，確定零序電流保護(hù)的整定值以及三相重合閘裝置選型。 關(guān)鍵詞：閉鎖裝置；零序電流保護(hù)；三相重合閘
ABSTRACT:Power system protection is to ensure the security and stability of the power system operation，restrictions on a large scale power blackouts most basic and most effective technological means．Zero-sequence current protection as a broad grounding power system short-circuit protection According to a short ground zero sequence current size of the emergence and features as fault，transformer phase operation．Single-phase automatic reclosing of factors such as zero-sequence current protection of the operation have a major impact，need to take the necessary corresponding device． According to the design of protective relaying equipment in the power system，the application Details on the 220 kV high voltage power grid relay the zero-sequence current protection of the entire set design． Design process are as follows，first on the power system network parameters，to map out the sequence network map then choose a reasonable mode of operation，Calculation of the bus occurred metallic short-circuit fault circuit protection device by the short circuit current．According to the data collected and choice of the mode of operation with the best choice of protection and the protection of analysis and tuning，identify zero-sequence current protection of the setting value and three-phase reclosing devices Selection． Key words：Locking devices；Zero-sequence protection；Three-phase reclosing |
