
[电] 接地变压器
In this paper, the current-current neutral grounding transformer neutral point commonly used to protect the way of protection was discussed;
本文主要对目前大电流中性点接地变压器中性点保护普遍采用的保护方式进行了探讨;
The principle, main design point and no load voltage ratio calculation method of resin insulation dry-type grounding transformer are introduced.
介绍了树脂绝缘干式接地变压器的工作原理、设计要点及空载电压比的计算方法。
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.
通过接地变压器结构型式、容量和阻抗电压的分析研究,得出正确选择接地变压器的方法。
Based of the experience in the technical transformation engineering, the two winding methods for Z/Y wire of grounding transformer are discussed.
本文论述了接地变压器在电力网中的作用,阐明了接地变压器的主要技术参数的确定依据及运行中的实际效果。
This paper proposes a study of the influence of the HVDC(High Voltage Direct Current transmission) ground electrode current on neutral grounding transformer.
讨论了高压直流输电系统的运行方式,提出了接地极设计参数的推荐数值。
In mode selection of middle and large capacity units nowadays, there mainly have two types of Peterson coil grounding and distribution transformer with resistor.
在现有大中型发电机中性点接地选择上,主要有消弧线圈接地方式和接地变高阻接地方式。
Two different viewpoints about neutral ground way of large-capacity generators at present, neutral grounding by distribution transformer or resonant.
目前对大容量发电机中性点接地方式有两种不同观点,即中性点经配电变高阻接地和经消弧线圈谐振接地。
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.
经分析比较认为,在水电站水轮发电机组宜选用接地变高阻接地方式;
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.
介绍变压器铁芯和夹件接地回路及变压器铁心多点接地检测装置。
Transformer grounding via resistance is efficient way to limit DC bias current.
分析了接地系统电阻对直流偏磁电流的影响;
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.
为了研究直流偏磁电流与直流接地极周围的地表电位和地电流分布的关系。
The characteristics of transformer core multiple grounding fault are analysed, the diagnosis and treatment methods are introduced.
文章介绍变压器铁芯多点接地故障的诊断和处理方法。
The method of using linear power and adding low-pass filter and isolation transformer with effective grounding measure had the best anti-interference effect.
采用线性电源、前端加置低通滤波器和隔离变压器、有效接地的方案,得到的抗干扰效果最好。
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.
对某电厂使用的变压器高压油浸纸电容式套管和环氧浸纸电容式套管的运行情况进行了比较,并对曾出现的故障类型进行了分析。
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.
发电厂、变电站中的直流系统接地故障检测对于保障电力系统的安全运行十分重要。
Grounding resistance is an important technical parameter of grounding system of electric power plant and transformer substation .
接地电阻值是发电厂、变电站接地系统的重要技术指标。
In this paper, we built a typical substation model, including overhead transmission line, transformer, lighting rod and grounding system.
在论文中,我们建立了一个变电站的模型,他包括输电母线、变压器、避雷针和接地网络。
In ungrounded distribution system the single-phase-grounding and the ferro-resonance caused by the PT (Potential Transformer) are of the frequent accidents.
在中性点非直接接地电网中,单相接地及由电压互感器(PT)引起的谐振过电压均是多发性的事故。
|earthing transformer;[电]接地变压器
Grounding Transformer(接地变压器)是电力系统中用于提供中性点接地的特殊变压器,主要用于三相不接地或阻抗接地系统中,通过构建人工中性点实现系统接地保护。其核心功能在于限制故障电流、平衡电压波动,并提高电网运行稳定性。
接地变压器通常采用曲折形(Zig-Zag)绕组结构,三相绕组分两组反向串联,磁路对称。当系统正常运行时,三相磁通相互抵消,呈现高阻抗;发生单相接地故障时,零序电流通过中性点流入大地,此时变压器呈现低阻抗,强制形成短路回路以限制过电压。该特性可防止设备绝缘击穿,符合IEEE Std 142-1991《接地系统设计规范》中对故障电流抑制的要求。
接地变压器通过中性点注入电阻或电抗,可实现接地方式的灵活配置。例如,结合消弧线圈(Peterson Coil)使用时,可将故障电流补偿至5A以下,有效消除间歇性电弧(来源:《电力系统接地技术手册》,中国电力出版社)。其设计需满足GB 1094.1-2013《电力变压器》的温升与短路耐受要求。
美国国家电气规范(NEC 250.36)要求接地变压器容量需覆盖最大单相接地故障电流,而欧盟标准EN 50522-2010则强调其耐压等级需高于系统标称电压的1.9倍。实际选型时需结合系统短路容量、接地电阻值等参数综合计算(来源:西门子《接地系统设计手册》)。
“Grounding transformer”是电力工程领域的专业术语,具体含义和用途如下:
“Grounding transformer”中文译为接地变压器,主要用于电力系统中为三相系统提供中性点接地的路径。它的核心功能是确保系统在故障(如单相接地)时能安全泄放电流,避免电压异常升高。
普通变压器(Transformer)主要用于电压转换,而接地变压器侧重于安全保护,例如防止铁芯多点接地故障。此外,接地变压器通常容量较小,且设计时需考虑短时过载能力。
在电力系统改造中,接地变压器常被用于老旧电网升级,通过技术分析可快速定位铁芯多点接地等故障原因。
需注意,“Transformer”在计算机领域指深度学习模型(如自然语言处理中的Transformer架构),与电力术语无关。若需进一步了解电力设备参数或模型架构,可查阅相关专业文献。
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