考虑电池储能系统荷电状态的近海可再生能源综合发电协调控制  

A Coordinated Control Strategy for Hybrid Offshore Renewable Energy Power Generation Considering State of Charge of Battery Energy Storage System

作　　者：王荃荃[1] 秦川[1] 鞠平[1] 吴峰[1] 

机构地区：[1]可再生能源发电技术教育部工程研究中心(河海大学),江苏省南京市210098

出　　处：《电网技术》2014年第1期80-86,共7页Power System Technology

基　　金：国家自然科学基金重点项目(51137002);江苏省自然科学基金重点研究专项(BK2011026)~~

摘　　要：近海可再生能源综合发电系统融合近海风电、波浪能发电以及潮流能发电于体,其输出功率具有较大的随机波动特性。为减小功率波动对电网的不利影响,采用电池储能对综合发电系统的输出功率进行平滑。在此基础上,考虑电池的荷电状态,提出了在防止电池过充过放的同时尽可能保持系统输出功率平稳的协调控制策略。当荷电状态维持在正常水平时,通过电池的充放电控制平抑功率波动;当电池发生过充电时,通过风电和潮流能机组的超速与变桨距协调控制,降低发电机侧输出功率;当电池发生过放电时,通过降低网侧输出功率设定值使电池恢复到正常工作状态。算例结果验证了上述方法的正确性和有效性。In view of the fact that hybrid offshore renewable energy power generation system is composed of offshore wind power generation, wave power generation and tidal power generation and they are integrated as a whole, there is considerable random fluctuation in the output power of the hybrid generation system. To reduce the affection of power fluctuation on power grid the battery energy storage system is adopted to smooth the output power of the hybrid generation system. On this basis, considering the state of charge of batteries, a coordinated control strategy, which can keep output power of the hybrid generation system as smooth as possible and prevent the over-charging/over-discharging of batteries in the meantime, is proposed. When the state of charge of batteries is maintained in the normal level, the power fluctuation can be suppressed by the charging/discharging of batteries; when over-charging of batteries occurs, output power of generators can be reduced by the coordinated control of overspeed and pitch-varying of wind turbines and tidal generation units; when over-discharging of batteries occurs, the normal working state of batteries can be recovered by reducing the output power setting at grid-side. Results of calculation example show that the proposed coordinated control strategy is correct and effective.

关 键 词：近海可再生能源综合发电 电池储能 荷电状态 协调控制 

分 类 号：TM76[电气工程—电力系统及自动化]