开断电压
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The high-power system including main circuit, the charging and discharging circuit of synthetic circuit test system, and the principle of charging and discharging for current supply using electrolytic capacitor is presented. At the aspect of circuit breaker control, the advanced permanent magnetic actuator is used and analyzed in this paper, including the precision computation and using in synthetic circuit. The trigger circuit of voltage supply is designed, and the intelligent control is used to trigger the igniting gap. And the integraph based Rogowski coil is designed and employed the intelligent detection of breaking current.
强电系统介绍了合成回路试验系统的主电路及其充放电电路,讲述了电流源采用电解电容器的充放电原理;断路器控制方面,采用当前比较先进的永磁操动机构,并对永磁机构的原理、精度计算和在合成回路中的应用做了详细地分析;设计并制作了电压源点火回路,对球隙点火进行智能控制;在智能检测开断电流方面,设计并制作了与Rogowski线圈相配合的积分器。
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On this basis, the prccesses of interrupting small inductive current by the vacuum interruptor were modelled in a computer program, and the effects of the circuit conditions on the vacuums ...
通过试验和模拟计算,获得了ZN—6/600真空开关有关截流、触头间隙击穿和电流高频过零熄弧的随机特性,分析了一些电路条件对真空开关开断感性小电流时的操作过电压的影响。
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The voltage and the sensitivity of voltage to system operation parameters are calculated by Newton power flow approach; the various higher order derivatives of voltage and voltage sensitivity to line openbreak parameter can be obtained by using the convergent correction equation of power flow and the equation of calculating sensitivity for the N power system. Finally, the voltage and sensitivity of N-1 power system can he calculated by correcting the voltage and sensitivity of N power system by Taylor series expansion.
通过牛顿潮流计算出N网络的各节点电压及其对系统运行参数的灵敏度;利用已收敛的潮流修正方程式和N网络灵敏度计算方程式分别对线路开断参数多阶求导,从而计算出电压和灵敏度对此线路开断参数的多阶导数值;根据泰勒级数展开式修正N网络的电压和灵敏度值,得到N-1网络的电压和灵敏度值。
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On the base of practical transformer substation main connection, electric components and system circuit model are first formed in the paper; analyze vacuum arc characteristic and medium resume are analyzed, then, according to vacuum chamber physical process of switching AC arc, resume process are divided into three stages: sheath development, neutral particles diffusion and static characteristic, with that, calculating model of medium resume strength is erected and applied in the computing of vacuum circuit breaker interrupting transform overvoltage; In the paper, Saber software is used to simulate a whole switching process; As follows, overvoltage characteristic of vacuum circuit breaker switching no load and load transformers, kinds of influence factors are analyzed in detail; At last, vacuum circuit breaker switching capacitance group overvoltage formative causes and electrode refining for lessening reignition are discuss.
本文针对中低压变电站的实际主接线建立各电气元件及系统的电路模型;在真空电弧的特点及间隙的介质恢复特性上,依据真空断路器灭弧室分断电弧的物理过程,将真空电弧熄灭后的恢复过程分为鞘层发展、中性粒子扩散和静态特性三个阶段,建立了相应的介质恢复强度的计算模型,应用到切除变压器操作过电压的计算中;采用Saber仿真软件模拟计算真空断路器切除变压器操作过电压;并分别对真空断路器切除空载及负载变压器操作过电压的特点与影响操作过电压的各种因素做了详细的分析;最后简要分析了真空断路器开断电容器组过电压的形成原因及为减少重燃的电极老炼措施。
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On the base of practical transformer substation main connection,electriccomponents and system circuit model are first formed in the paper;analyze vacuum arccharacteristic and medium resume are analyzed,then,according to vacuum chamberphysical process of switching AC arc,resume process are divided into three stages:sheathdevelopment,neutral particles diffusion and static characteristic,with that,calculatingmodel of medium resume strength is erected and applied in the computing of vacuumcircuit breaker interrupting transform overvoltage;In the paper,Saber software is used tosimulate a whole switching process;As follows,overvoltage characteristic of vacuumcircuit breaker switching no load and load transformers,kinds of influence factors areanalyzed in detail;At last,vacuum circuit breaker switching capacitance groupovervoltage formative causes and electrode refining for lessening reignition are discuss.
本文针对中低压变电站的实际主接线建立各电气元件及系统的电路模型;在真空电弧的特点及间隙的介质恢复特性上,依据真空断路器灭弧室分断电弧的物理过程,将真空电弧熄灭后的恢复过程分为鞘层发展、中性粒子扩散和静态特性三个阶段,建立了相应的介质恢复强度的计算模型,应用到切除变压器作过电压的计算中;采用Saber仿真软件模拟计算真空断路器切除变压器作过电压;并分别对真空断路器切除空载及负载变压器作过电压的特点与影响作过电压的各种因素做了详细的分析;最后简要分析了真空断路器开断电容器组过电压的形成原因及为减少重燃的电极老炼措施。
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On the base of practical transformer substation main connection,electriccomponents and system circuit model are first formed in the paper;analyze vacuum arccharacteristic and medium resume are analyzed,then,according to vacuum chamberphysical process of switching AC arc,resume process are divided into three stages:sheathdevelopment,neutral particles diffusion and static characteristic,with that,calculatingmodel of medium resume strength is erected and applied in the computing of vacuumcircuit breaker interrupting transform overvoltage;In the paper,Saber software is used tosimulate a whole switching process;As follows,overvoltage characteristic of vacuumcircuit breaker switching no load and load transformers,kinds of influence factors areanalyzed in detail;At last,vacuum circuit breaker switching capacitance groupovervoltage formative causes and electrode refining for lessening reignition are discuss.
本文针对中低压变电站的实际主接线建立各电气元件及系统的电路模型;在真空电弧的特点及间隙的介质恢复特性上,依据真空断路器灭弧室分断电弧的物理过程,将真空电弧熄灭后的恢复过程分为鞘层发展、中性粒子扩散和静态特性三个阶段,建立了相应的介质恢复强度的计算模型,应用到切除变压器操作过电压的计算中;采用Saber仿真软件模拟计算真空断路器切除变压器操作过电压;并分别对真空断路器切除空载及负载变压器操作过电压的特点与影响操作过电压的各种因素做了详细的分析;最后简要分析了真空断路器开断电容器组过电压的形成原因及为减少重燃的电极老炼措施。
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Based on optoelectronic measuring system, arc voltage drops are observed in arc running process of current limiting circuit breaker.
本文采用光电测试系统,观察到在低压限流断路器开断过程中的电弧电压跌落现象。
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The characteristics and the advantages of the VD4 Vacuum Circuit Breaker s are de-scribed,as well as its type test.
本文分析了断路器开断小电感性电流时产生截流过电压的原理,提出了抑制过电压的方法,论述了 VD4真空断路器的结构特点和优越性能,介绍了其完整的型式试验,总结了真空断路器的操作要领。
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Compared the calculated curve and the real assay curve we can make a conclusion that: this method can calculate the melting time of the fuse at the huge short current (more than 50 times of the current rating) with the error less than 5%; the resistor and time characteristic can also be acquired, it provided the date for overvoltage calculation of the fuse model. The research of the overvoltage during fusing process is based on short circuit test of the fuse.
由计算结果与实际试验曲线对比可得:该种方法能够比较准确地计算出较大短路电流下(熔断器额定电流的50倍以上)熔断器的弧前时间,误差一般在5%以内;同时还可以算得熔断器在弧前的电阻时间特性,为开断过电压仿真计算电路中的熔断器模型提供数据。
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dropout voltage:回动电压
drop-out voltage 去励磁电压; 开断电压; 灭磁电压 | dropout voltage 回动电压 | dropping voltage generator 降压特性振荡器
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FU:熔断器
5.高压限流熔断器(FU) 高压限流熔断器是整个装置的后备保护器件,用来防止短路事故,具有开断迅速、开断容量大的特点. 6.电压互感器(TV) 用于将系统的一次高电压转换为微机控制器可处理的二次低电压,供监测及采样.
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static voltage stability region:静态电压稳定域
static switching 静态开断,静态转换 | static voltage stability region 静态电压稳定域 | static voltmeter 静电电压表
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drop-out voltage:去励磁电压; 开断电压; 灭磁电压
drop-away voltage 释放电压 | drop-out voltage 去励磁电压; 开断电压; 灭磁电压 | dropout voltage 回动电压
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drop-out voltage:失激磁电压,灭磁电压,开断电压
"dropout time ","释放时间" | "drop-out voltage ","失激磁电压,灭磁电压,开断电压" | "drop-out-pick-up ratio ","释放-吸合比"