一种基于DSSC集中控制的实时优化分配方法

分布式静止串联补偿器(DSSC)体积小、功耗低,可直接串接在输电线路上进行潮流控制,已成为最具前景的分布式柔性交流输电技术之一。为了解决DSSC系统中各子模块协调配合控制问题,文中针对各子模块运行状态、调节性能的差异性,按照“以状态分类-以调节性能制定优先级”的思想,提出了子模块调节出力的实时优化分配方法,实现子模块启停次数最少,延长子模块运行寿命的目标。基于实时数字仿真器对功率优化分配方法进行闭环仿真分析,结果表明,对比传统平均分配法和比例分配法,文中所述方法在调节速度和精度上有很大提高,能够满足DSSC的实时潮流调控要求。

A real-time optimal allocation method for DSSC based on centralized control

The distributed static series compensator(DSSC)has the characteristics of small size and low power consumption,and it can be directly connected to the power line for power flow control which makes it become one of the most promising distributed flexible AC transmission technologies.In order to solve the problem of coordinated coordination control of each sub-module in the DSSC system,the paper discusses the difference between the operating state and the adjustment performance of each sub-module,and proposes real-time optimization allocation method on the output of sub-module according to the idea of“classifying with state-setting performance with adjustment performance”,to achieve the minimum number of start-stop sub-modules and to extend the operating life of the sub-module.Based on the RTDS platform,the closed-loop simulation analysis of the optimized allocation method is carried out.It is verified that the method can meet the power flow control requirements of DSSC.Compared with the traditional average distribution method and the proportional distribution method,the method has greatly improved the adjustment speed and adjustment accuracy.