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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Design-Oriented Transient Stability Analysis of Grid-Connected Converters With Power Synchronization Control
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Design-Oriented Transient Stability Analysis of Grid-Connected Converters With Power Synchronization Control

机译：具有功率同步控制的并网换流器的面向设计的暂态稳定性分析

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The power synchronization control (PSC) has been increasingly used with voltage-source converters (VSCs) connected to the weak ac grid. This paper presents an in-depth analysis on the transient stability of the PSC-VSC by means of the phase portrait. It is revealed that the PSC-VSC will maintain synchronization with the grid as long as there are equilibrium points after the transient disturbance. In contrast, during grid faults without any equilibrium points, the critical-clearing angle (CCA) for the PSC-VSC is identified, which is found equal to the power angle of the unstable equilibrium point of the postfault operation. This fixed CCA facilitates the design of power system protection. Moreover, it is also found that the PSC-VSC can still resynchronize with the grid after around one cycle of oscillation, even if the fault-clearing angle is beyond the CCA. This feature reduces the risk of system collapse caused by the delayed fault clearance. These findings are corroborated by simulations and experimental tests.
机译：电源同步控制（PSC）已越来越多地用于连接到弱交流电网的电压源转换器（VSC）。本文通过相图对PSC-VSC的瞬态稳定性进行了深入分析。据揭示，只要在瞬变扰动之后存在平衡点，PSC-VSC将保持与电网的同步。相反，在没有任何平衡点的电网故障期间，将确定PSC-VSC的临界清除角（CCA），该临界清除角等于后故障操作不稳定的平衡点的功率角。此固定的CCA有助于设计电源系统保护。此外，还发现，即使故障清除角超出了CCA，PSC-VSC在大约一个振荡周期后仍可以与电网重新同步。此功能降低了由于延迟清除故障而导致系统崩溃的风险。这些发现通过模拟和实验测试得到了证实。

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