基于静止无功发生器的三态滞环控制策略研究

Three level hysteresis current control method based on static var generator

为确保采用直接电流控制方式的静止无功发生器在准确快速补偿无功的同时降低开关频率和损耗,提出了三态滞环控制策略。分析了传统滞环控制策略和三态滞环控制策略的原理以及开关频率。仿真对比验证表明,三态滞环控制策略比传统滞环控制策略的开关频率低、动态损耗小,可以有效提高整个装置的运行效率。

The direct current control based on static var generator is adopted in reactive compensation. In the meantime, to reducing switching frequency and loss, a three-level hysteresis control method is put forward in this paper. Some analyses on theory and switching frequency are put in this text between traditional hysteresis control method and three-level hysteresis control method, and the simulation is done subsequently. Theory analysis and simulation results verify the merits of the three-level hysteresis control method, low switching frequency, little dynamic loss. So it can improve the efficiency of the whole equipment.