摘要
风电出力具有间歇性、不稳定性等特点,分布式风电往往难以独立满足负荷需求,且弃风率较高。为此,将风电、小水电与储能电池同时接入配电网中,以保证系统的稳定性及降低系统的弃风率。首先,以网损最小为目标计算得到风电和小水电的接入位置,并通过PSASP软件进行验证,再利用Matlab软件测出接入节点的电压偏移量。其次,先以网损最小为目标得到全钒液流电池(vanadium redox battery, VRB)的接入位置,再综合考虑总成本和弃风量构造多目标函数,采用改进的基于杂交的粒子群算法对函数进行优化得到VRB的最优容量。最后,运用IEEE 36节点系统和某地区实际的风电、水电数据来验证此方法的有效性。仿真结果表明,所提出的方法可降低风电的弃风率、维持系统的稳定性及满足用户的用电需求,同时可达到经济性要求。
Wind power output is characterized by intermittensity and instability, and distributed wind power is offen difficult to meet load demand independently, and the wind curtailment rate is high. Therefore, wind power, small hydropower and energy storage batteries are connected to the distribution network at the same time to ensure the stability of the system and reduce the wind curtailment rate of the system. Firstly, the access positions of wind power and small hydropower are calculated with the goal of minimizing the network loss, and verified by PSASP software. Then, the voltage offsets of access nodes are measured by Matlab software. Secondly, the access position of vanadium redox battery(VRB) is obtained with the goal of minimizing the network loss. Then, the multi-objective function is constructed by considering the total cost and air abandon volume. The optimized function is obtained by using the improved hybrid based particle swarm optimization algorithm. Finally, the IEEE 36-node system and the actual wind and hydropower farm data in a certain area are used to verify the effectiveness of the proposed method. The simulation results show that the proposed method can reduce the wind curtailment rate of wind power, maintain the stability of the system, meet the demand of users, and meet the economic requirements.
作者
闫瑾
刘丁玮
罗日成
刘鹏
冯健
邓华宇
钟焱
YAN Jin;LIU Dingwei;LUO Richeng;LIU Peng;FENG Jian;DENG Huayu;ZHONG Yan(School of Electrical and Information Engineering,Changsha University of Science&Technology,Changsha 410114,Hunan Province,China;College of Electrical and Information Engineering,Hebei University of Science and Technology,Shijiazhuang 050091,Hebei Province,China)
出处
《分布式能源》
2022年第4期1-9,共9页
Distributed Energy
基金
国家青年科学基金项目(51407013)。
关键词
分布式电源
储能电池
接入位置
全钒液流电池(VRB)最优容量
distributed generation
energy storage battery
access location
vanadium redox battery(VRB)optimal capacity