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以江西樟树±2Mvar的配电网静止无功发生器(DSTATCOM)的动态补偿项目为背景,以同步补偿谐波和无功为目的,通过现场电能质量测试分析,提出通过对谐波与无功进行有针对性的重点补偿,以降低DSTATCOM的容量需求。以此为基础,从工程实用性出发,提出一种基于限值判断的DSTATCOM分频协调控制方法,并进行了详细仿真验证。该方法通过实时的限值判断确定无功与各次谐波电流的补偿重点,以基于瞬时无功功率理论的电流检测方法为基础,结合直流侧电压的直接比例积分(PI)控制算法和补偿电流的增量迭代式广义积分控制算法实现基波与各次谐波的分频控制。该方法工程实用性强,可根据不同工况有选择性地分频率解决最为关键的电能质量问题,能够有效降低实际应用中DSTATCOM所需的容量,从而大力提升其性价比,对推广DSTATCOM的应用具有一定的意义。
Taking the dynamic compensation project of static electricity generator (DSTATCOM) of ± 2% distribution network of Camphor tree in Jiangxi Province as the background, the harmonic power and reactive power were compensated through the on-site power quality test and analysis. Targeted key compensation to reduce the capacity requirements of DSTATCOM. Based on this, based on the engineering practicability, a DSTATCOM frequency-division coordinated control method based on the limit judgments is proposed, and a detailed simulation is carried out. Based on the current detection method based on instantaneous reactive power theory and combined with the direct proportional-integral (PI) control algorithm of DC voltage and the compensation method, this method determines the compensation focus of reactive power and each harmonic current by real- Incremental Current Iterative Generalized Integral Control Algorithm Realizes Frequency Division Control of Fundamental and Harmonics. The method has strong engineering practicability, can selectively divide the frequency according to different working conditions to solve the most critical power quality problems, and can effectively reduce the capacity required by the DSTATCOM in practical applications, so as to greatly enhance the cost performance and promote the application of DSTATCOM A certain meaning.