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以补偿电压跌落的最大可持续补偿时间为控制目标,提出一种用于电压跌落补偿系统的新型时间优化控制策略。利用时间优化控制策略,在电路系统参数一定时,用较小的直流储能或较低的直流母线电压就能取得较大的持续补偿时间。同时,将时间优化控制策略与能量优化控制策略进行对比研究。研究表明,在一定情况下,运用时间优化控制策略能取得比运用能量优化控制策略更长的持续补偿时间。仿真结果很好地验证了理论分析。
In order to compensate the maximum sustainable compensation time of voltage sag as a control target, a new time-optimized control strategy for voltage sag compensation system is proposed. Using the time-optimized control strategy, larger continuous compensation time can be obtained with smaller DC energy storage or lower DC-link voltage when the parameters of the circuit system are certain. At the same time, the time optimization control strategy and energy optimization control strategy are compared. The research shows that under certain circumstances, using the time-optimized control strategy can achieve a longer compensation time than the energy-optimized control strategy. The simulation results well validate the theoretical analysis.