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首页> 外文期刊>American journal of applied sciences >The Mathematical Model and Simulation of Static Var Compensator in Medium Transmission Line
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The Mathematical Model and Simulation of Static Var Compensator in Medium Transmission Line

机译：输电线路静态无功补偿器的数学模型与仿真

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Problem statement: The Static Var Compensator (SVC) have been widely investigated its effect on transient stability of Single Machine Infinite Bus (SMIB) system. The exact medium transmission line model in power system consists of the series resistance series reactance and shunt capacitance. It is not easy task to obtain the mathematical model of the SVC with the exact medium transmission line model for investigating transient stability performance. Approach: This study applied the concept of the two-port network to simplify the mathematical model of the power system. The full capacity of the SVC on transient stability improvement of the SMIB with the medium transmission line was then investigated. The proposed method was tested on sample system and compared on various cases. Results: The first swing of rotor angle curve of the faulted system without resistance was obviously higher than that of with resistance whereas the second swing of the faulted system without resistance was slightly less than that of with resistance. The system with a SVC could improve transient stability of power system. Conclusion: The SVC and resistance of the line can improve first swing of rotor angle. The resistance of the line provides negative effect on second swing of rotor angle. The simulation results indicate that for practical medium line, the resistance is very import parameters for evaluating transient stability of power system.
机译：问题陈述：静态无功补偿器（SVC）已被广泛研究其对单机无限总线（SMIB）系统瞬态稳定性的影响。电力系统中的精确介质传输线模型包括串联电阻串联电抗和并联电容。用精确的介质传输线模型获得SVC的数学模型来研究暂态稳定性能并非易事。方法：本研究应用了两端口网络的概念来简化电力系统的数学模型。然后研究了SVC的全部容量，以改善带有介质传输线的SMIB的瞬态稳定性。该方法在样本系统上进行了测试，并在各种情况下进行了比较。结果：无阻力故障系统的转子角曲线的第一摆幅明显大于有阻力故障系统的转子角曲线摆幅，而无阻力的故障系统转子角曲线的第二摆幅略小于有阻力的转子系统。具有SVC的系统可以提高电力系统的暂态稳定性。结论：SVC和线路电阻可以改善转子角的初摆。线路的电阻对转子角的第二摆动产生负面影响。仿真结果表明，对于实用的中线，电阻是评估电力系统暂态稳定性的重要参数。

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