基于动态无功电流检测方法的模块化STATCOM研究

Proceedings of The 7th International Power Electronics and Motion Control Conference Pub Date : 2012-06-02 DOI:10.1109/IPEMC.2012.6259300

Jingsong Zhu, Lei Li, Min Pan

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引用次数: 4

摘要

模块化电路已成为新型变换器拓扑结构，广泛应用于UPS、大功率源、高压直流等领域。在模块化电压源变换器的基础上，研究了具有补偿效果好、动态响应高等优点的模块化STATCOM。分析了该器件的电路拓扑结构和工作原理。通过对单相无功补偿系统的研究，研究了一种新的动态无功电流检测方法。利用三角函数的数学关系，从电压和电流的瞬时采样直接计算无功电流幅值。给出了STATCOM的控制策略，控制直流电容电压在平衡状态下工作。测试结果证明了该系统的正确性和有效性。

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Research on modular STATCOM based on dynamic reactive current detection method

Modular circuit has become the new converter topology widely used in the field of UPS, high power source, HVDC and other areas. Based on the modular voltage sourced converter, modular STATCOM has been discussed, which has the advantages of better compensation and high dynamic response. Circuit topology and work principle of the proposed device are analyzed. With the study of single-phase reactive compensation system, a new dynamic reactive current detection method is studied. The reactive current amplitude is calculated directly from the instantaneous samplings of voltage and current by means of mathematic relation of trigonometric function. Control strategy of STATCOM is given and DC capacitor voltages are controlled to operate under balanced condition. The correctness and validity of this system are proved by test results.

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Proceedings of The 7th International Power Electronics and Motion Control Conference

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