In a drive system of power transistor inverter-motor, not only can it be used in fine control of motor current waveform, phase, amplitude and frequency, but can also be used to sense, fault current.
在大功率晶体管逆变器——电动机驱动系统中,它不但可用来对电动机电流的波形、相位、幅值和频率进行精细控制,而且能快速地检测出故障电流。
It is essential to distinguish excitation inrush from fault current in transformer differential protection.
变压器差动保护的关键问题是判别变压器差动电流是励磁涌流还是故障电流。
The aim of grounding is to provide the discharging channels for fault current and lightning current and ensure the safety of the system, the equipment and the personnel.
接地的目的是提供故障电流和雷电流泄流通道,保证系统、设备和人员安全。
Experimental results showed that the fault current limiter was effective in curbing the short-circuit current peak and RMS, and it also performed well on inhibiting the bus voltage drop.
试验结果表明,限流器可以有效限制短路电流的峰值和有效值,对于母线电压跌落也有较好的抑制效果。
Operational curve is an effective tool used to calculate fault current at anytime.
运算曲线是求解任意时刻短路电流的有效工具。
The superconducting fault current limiter with a diode bridge has the salient advantages.
桥路型超导故障限流器具有许多独特的优点。
Fundamental investigations have been performed in this thesis on the fault current limiting schemes.
本论文对故障电流限制方案进行了基础性研究。
By reason of its high reliability, the resonant-type fault current limiter is suitable for EHV power network.
谐振型限流器具有高可靠性等优点,适用于超高压电网。
If a fault occurs, the fuse ruptures diverting all the fault current through the trip coil, tripping the breaker.
如有故障发生,熔断器会断开,使所有故障电流流经跳闸线圈,将断路器断开。
Calculating Remote short circuit fault current, one must consider that the electrical parameters vary with current.
计算远端短路故障电流时,必须考虑轨道暂态电气参数的变化。
The fault current limiting principle of SFCL-MES is tested on the model, and its validity is confirmed by the experiment.
在模型上对SFCL—MES的故障限流原理进行了试验,初步验证了它的有效性。
In this paper the fault locating algorithm based on phase Angle modification of the-fault current component is discussed.
本文对故障电流相位修正测距算法进行了分析讨论。
This paper introduces a novel short circuit fault current limiter applicable to the three-phase ungrounded power systems.
介绍了一种适用于三相不接地系统的短路故障限流器。
The fault-current-limiting integration model of SFCL-MES is proposed on its fault current limiting integration principle.
根据SFCL-MES的限流集成原理,提出了它的限流集成模型。
The superconducting fault current limiter (SFCL) can limit current and realize to control the voltage dip in non-faulted line.
超导故障限流器可以在限流的同时实现控制非故障线路电压跌落的目的。
The theory of fault locating by calculating the reactance of feeder line with measured fault current and voltage is introduced.
介绍了利用故障电压和故障电流计算故障回路电抗值的电抗法故障点定位的原理。
As the large fault current occurs in DC power system, the paper makes use of IGBT to design a new type DC fault current limiter.
针对直流电网短路故障时迅速产生的短路电流,利用IGBT器件为核心,设计出一种新型的直流短路电网限流装置并阐述了其工作原理。
In this paper, the effect of introduction of fault current limiter (FCL) is investigated when it is used in a distribution systems.
研究了在配电系统中引入限流器后的系统行为。
This paper presents a fault diagnosis method for neutral grounding three-phase bridge type solid-state fault current limiter (SSFCL).
探讨了中性点接地三相桥式固态限流器桥路故障诊断方法。
Large number of loop operation, especially the electromagnetic loop operation, has made the fault current excess the switch capacity.
由于大量的环网运行方式,尤其是电磁环网运行方式,造成电网短路电流超出开关设备容量。
The harm of single-phase grounding fault current in the medium-voltage power network has been gotten the universal solicitude of people.
中压电网中,单相接地故障电流的危害性受到了人们的普遍关注。
Solving the fault current distribution is one of the most important tasks in the research of electromagnetic compatibility in power system.
获取准确的短路故障电流分布是电力系统电磁兼容的重要内容之一。
It should be noted that the DC transmission system does not contribute to the fault current flowing in the AC system5 during the AC faults.
应注意到,直流输电系统并不会增加交流系统故障时的故障电流。 收藏。
If single phase grounding fault is occurred, fault current is very small, so it can continue to run for 1~2 hours according to the protocol.
系统发生单相接地故障以后,因为故障电流很小,不至于影响系统的对称运行,所以按照规程可以继续运行1~2个小时。
Based on grille fractal and self-adaptive morphological filter, a novel approach to identify inrush current and internal fault current is presented.
提出了一种基于网格分形和自适应形态滤波器识别励磁涌流与内部故障电流的新方法。
So distinguishing between magnetizing inrush current and fault current correctly is the key to ensure transformer differential relay to operate credibly.
因此,正确识别励磁涌流是保证变压器差动保护可靠运行的关键。
Sag state estimation observability analysis is modeled and correlative modification method is proposed from the point of fault current superimposing firstly.
基于故障电流叠加原理,构造了电压跌落状态估计可观性分析的数学模型,合理地解决了部分故障路段不可观的问题。
The working principle of saturated core superconducting fault current limiter (SCFCL) is analyzed and its electromagnetic constraint relation under normal operation is given.
分析了饱和铁心超导限流器的工作原理,给出了其正常工作的电磁约束关系。
The limiting resistance in SFCL and the fault detection time impact on peak value of fault current, line voltage of feeders without fault and voltage across SFCL are analysed.
给出了超导限流器的数学模型,着重分析了超导限流器限流电阻和故障检测时间对短路电流峰值、非故障线电压、超导限流器上的电压的影响。
Current compensation superconducting fault current limiter is a novel topology of FCL which consists of an equivalent AC current source with a limiting resistance in parallel.
电流补偿型超导限流器是一种新型的限流器拓扑,它由等效电流源、限流电阻并联后通过连接变压器串联入电力系统。
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