
[電] 接地變壓器
In this paper, the current-current neutral grounding transformer neutral point commonly used to protect the way of protection was discussed;
本文主要對目前大電流中性點接地變壓器中性點保護普遍采用的保護方式進行了探讨;
The principle, main design point and no load voltage ratio calculation method of resin insulation dry-type grounding transformer are introduced.
介紹了樹脂絕緣幹式接地變壓器的工作原理、設計要點及空載電壓比的計算方法。
Based on the analysis of the structural type, capacitance and impedance voltage of grounding transformer, a proper method of choosing grounding transformer is proposed in this paper.
通過接地變壓器結構型式、容量和阻抗電壓的分析研究,得出正确選擇接地變壓器的方法。
Based of the experience in the technical transformation engineering, the two winding methods for Z/Y wire of grounding transformer are discussed.
本文論述了接地變壓器在電力網中的作用,闡明了接地變壓器的主要技術參數的确定依據及運行中的實際效果。
This paper proposes a study of the influence of the HVDC(High Voltage Direct Current transmission) ground electrode current on neutral grounding transformer.
讨論了高壓直流輸電系統的運行方式,提出了接地極設計參數的推薦數值。
In mode selection of middle and large capacity units nowadays, there mainly have two types of Peterson coil grounding and distribution transformer with resistor.
在現有大中型發電機中性點接地選擇上,主要有消弧線圈接地方式和接地變高阻接地方式。
Two different viewpoints about neutral ground way of large-capacity generators at present, neutral grounding by distribution transformer or resonant.
目前對大容量發電機中性點接地方式有兩種不同觀點,即中性點經配電變高阻接地和經消弧線圈諧振接地。
By analyses and compares, the conclusion is that it would be better to choose high resistance grounding of distribution transformer for hydro turbine in hydro power station.
經分析比較認為,在水電站水輪發電機組宜選用接地變高阻接地方式;
The device to check if there are multi-grounding locations in transformer core and to check the grounding circuit of core and clamping pieces are introduced.
介紹變壓器鐵芯和夾件接地回路及變壓器鐵心多點接地檢測裝置。
Transformer grounding via resistance is efficient way to limit DC bias current.
分析了接地系統電阻對直流偏磁電流的影響;
The DC grounding current flowing through transformer windings is decided by the distribution of earth surface potentials and DC grounding current around UHVDC grounding polar.
為了研究直流偏磁電流與直流接地極周圍的地表電位和地電流分布的關系。
The characteristics of transformer core multiple grounding fault are analysed, the diagnosis and treatment methods are introduced.
文章介紹變壓器鐵芯多點接地故障的診斷和處理方法。
The method of using linear power and adding low-pass filter and isolation transformer with effective grounding measure had the best anti-interference effect.
采用線性電源、前端加置低通濾波器和隔離變壓器、有效接地的方案,得到的抗幹擾效果最好。
The tests of the grounding apparatus mounted at the transformer bushing tap and oil-filled paper condenser type bushing of 220 kV transformers in Shahe substation is presented.
對某電廠使用的變壓器高壓油浸紙電容式套管和環氧浸紙電容式套管的運行情況進行了比較,并對曾出現的故障類型進行了分析。
Generally speaking, it is important for safe operation of power system that DC system grounding fault in power plants and transformer substations is detected timely and exactly.
發電廠、變電站中的直流系統接地故障檢測對于保障電力系統的安全運行十分重要。
Grounding resistance is an important technical parameter of grounding system of electric power plant and transformer substation .
接地電阻值是發電廠、變電站接地系統的重要技術指标。
In this paper, we built a typical substation model, including overhead transmission line, transformer, lighting rod and grounding system.
在論文中,我們建立了一個變電站的模型,他包括輸電母線、變壓器、避雷針和接地網絡。
In ungrounded distribution system the single-phase-grounding and the ferro-resonance caused by the PT (Potential Transformer) are of the frequent accidents.
在中性點非直接接地電網中,單相接地及由電壓互感器(PT)引起的諧振過電壓均是多發性的事故。
|earthing transformer;[電]接地變壓器
Grounding Transformer(接地變壓器)是電力系統中用于提供中性點接地的特殊變壓器,主要用于三相不接地或阻抗接地系統中,通過構建人工中性點實現系統接地保護。其核心功能在于限制故障電流、平衡電壓波動,并提高電網運行穩定性。
接地變壓器通常采用曲折形(Zig-Zag)繞組結構,三相繞組分兩組反向串聯,磁路對稱。當系統正常運行時,三相磁通相互抵消,呈現高阻抗;發生單相接地故障時,零序電流通過中性點流入大地,此時變壓器呈現低阻抗,強制形成短路回路以限制過電壓。該特性可防止設備絕緣擊穿,符合IEEE Std 142-1991《接地系統設計規範》中對故障電流抑制的要求。
接地變壓器通過中性點注入電阻或電抗,可實現接地方式的靈活配置。例如,結合消弧線圈(Peterson Coil)使用時,可将故障電流補償至5A以下,有效消除間歇性電弧(來源:《電力系統接地技術手冊》,中國電力出版社)。其設計需滿足GB 1094.1-2013《電力變壓器》的溫升與短路耐受要求。
美國國家電氣規範(NEC 250.36)要求接地變壓器容量需覆蓋最大單相接地故障電流,而歐盟标準EN 50522-2010則強調其耐壓等級需高于系統标稱電壓的1.9倍。實際選型時需結合系統短路容量、接地電阻值等參數綜合計算(來源:西門子《接地系統設計手冊》)。
“Grounding transformer”是電力工程領域的專業術語,具體含義和用途如下:
“Grounding transformer”中文譯為接地變壓器,主要用于電力系統中為三相系統提供中性點接地的路徑。它的核心功能是确保系統在故障(如單相接地)時能安全洩放電流,避免電壓異常升高。
普通變壓器(Transformer)主要用于電壓轉換,而接地變壓器側重于安全保護,例如防止鐵芯多點接地故障。此外,接地變壓器通常容量較小,且設計時需考慮短時過載能力。
在電力系統改造中,接地變壓器常被用于老舊電網升級,通過技術分析可快速定位鐵芯多點接地等故障原因。
需注意,“Transformer”在計算機領域指深度學習模型(如自然語言處理中的Transformer架構),與電力術語無關。若需進一步了解電力設備參數或模型架構,可查閱相關專業文獻。
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