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SUBSYNCHRONOUS OSCILLATION CONTROL BY THYRISTOR SWITCHED COMPENSATOR

机译：晶闸管开关补偿器的子同步振荡控制

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This paper explores the feasibility of controlling subsynchronous oscillations (SSO) by the modulation of scries compensation capacitance banks in transmission lines. Subsynchronous oscillations cause a tortional shaft torque on the generator. Damages resulting from uncontrolled subsynchronous oscillations have resulted in millions of dollars of loss due to breakdown in the shaft and costs for replacement power. Two transmission systems were selected for study. These were the benchmark systems that are recommended by the IEEE committee on subsynchronous resonance. The Electro Magnetic Transient Program (EMTP) was used to simulate these systems for studies. Different control strategies were developed to switch the series compensation capacitor banks in these test systems. These strategies were modeled as closed loop systems using Transient Analysis of Control System (TACS) in EMTP. A subsynchronous relay was used to detect the presence of subsynchronous currents in the transmission lines. The transfer function of this relay, describing its operation, was included in the EMTP's models of the systems. The relay provided an input for control in most of the devised strategies. Different strategies were studied on the test systems. The studies proved that effective control of SSO can be obtained by the detuning of the system and the removal or blocking of subsynchronous energy from the system.
机译：本文探讨了通过在传输线中调制Scriz补偿电容库来控制子同步振荡（SSO）的可行性。子同步振荡导致发电机上的倾斜轴扭矩。由于轴的故障和更换能力的成本，由于不受控制的子同步振荡而导致的损坏导致数百万美元的损失。选择两个传输系统进行研究。这些是IEEE委员会对子同步共振委员会建议的基准系统。电磁瞬态程序（EMTP）用于模拟这些系统进行研究。开发了不同的控制策略以在这些测试系统中切换串联补偿电容器组。这些策略使用EMTP中的控制系统（TACS）的瞬态分析为闭环系统。使用子同步继电器来检测传输线中的子同步电流的存在。该继电器的传递函数描述其操作中包含在系统的型号中。继电器在大多数设计的策略中提供了控制的输入。在测试系统上研究了不同的策略。研究证明，通过损害系统和从系统的去除或阻断子同步能量，可以获得对SSO的有效控制。

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