分布式控制模式下的分散式风电无功电压控制策略

Reactive Voltage Control Strategy for Decentralized Wind Power Generation in Distributed Control Mode

以分散式风电为对象,提出了分布式控制模式下的分散式风电无功电压控制策略,包括控制节点选择、无功指令计算、无功指令分配。分布式控制模式仅利用发电单元间局部通信网络实现,避免了集中式控制模式通信要求高、投资大等缺点,有较好的可扩展性和鲁棒性。仿真算例结果表明,在所有节点电压越限情况下,充分利用分散式风电机组的无功输出能力,实现对系统电压的高效调节,验证了在仅利用局部通信网络的分布式控制模式下实现分散式风电无功电压控制策略的可行性。

Taking decentralized wind power generation as object,a reactive voltage control strategy for decentralized wind power generation under distributed control mode was proposed,in which the selection of control nodes and the calculation and allocation of reactive power were included.Only utilizing local communication network among power generation units the distributed control mode could be realized,and the defects in centralized control mode such as large investment and high requirement could be avoided.Besides,there were better extendibility and robustness in the proposed control strategy.Simulation results show that under the most serious situation,i.e.,all nodal voltages are out-of-limit,the system voltage can be efficiently regulated by fully utilizing the reactive power output capability of decentralized wind power generation units,consequently the high-efficient regulation of system voltage can be realized,thus the feasibility of implementing reactive voltage control strategy by decentralized wind power generation under the distributed control mode,which only utilize local communication network,is verified.