基于FMSS的配电网馈线互联控制策略

Feeder Interconnection Control Strategy of Distribution Network Based on FMSS

现有的电力系统配电网亟需解决分布式电源大规模接入的问题,由于目前配电网一般设计时采用闭环方式,运行时采用开环方式,造成配电网内部会出现严重的馈线功率不平衡问题,常规开关等传统调控方法难以有效解决这类问题,而柔性多状态开关可以有效平衡馈线负载分配。针对这一问题,文中提出一种基于柔性多状态开关(flexible multi-state switch,FMSS)的配电网馈线互联控制策略。在探讨了FMSS接入配电网原则与拓扑结构的基础上,研究了开关和两边馈线实现功率交换的机理,设计了相应的控制策略使得FMSS可以同步实现配电网有功潮流调节与无功补偿。搭建了FMSS的仿真模型与试验平台,从而对配电网馈线互联控制策略的可行性与有效性进行验证。试验结果表明,文中提出的基于FMSS的配电网馈线互联控制策略能够较好地实现有功潮流调节与无功补偿。

The existing distribution network of power system urgently needs solving the problem of large-scale access of distributed generators.Since the current distribution network in general adopts the closed-loop mode in the design and open-loop mode in the operation,serious unbalance of feeder power in the distribution network occurs,which cannot be solved effectively by such traditional control method as conventional switch etc,while the feeder load distribution can be balanced effectively by flexible multi-state switch.In view of this issue,in this paper,a kind of feeder interconnection control strategy for distribution network based on flexible multi-state switch(FMSS) is proposed.On the basis of discussing the principle and topological structure of FMSS access to distribution network,the mechanism of power exchange between switch and two feeders is studied,and the corresponding control strategy is designed so that FMSS can synchronously realize active power flow regulation and reactive power compensation in distribution network.The simulation model and test platform of FMSS are built to verify the feasibility and validity of feeder interconnection control strategy in distribution network.It is shown by the experimental resultthat the proposed feeder interconnection control strategy based on FMSS switches can achieve better active power flow regulation and reactive power compensation.