摘要
针对光热-光伏系统无功补偿现以光热电站与光伏电站独立控制为主,且光热、光伏电站之间缺乏无功协调机制的特点,提出一种适应于光热-光伏联合发电系统的无功分层协调优化控制策略。该控制策略分3层执行:系统层根据系统汇集母线电压确定整个系统所需无功;电站层利用无功分层优化控制模型和基于差分进化的粒子群算法(DE-PSO)对光热、光伏电站分配无功;设备层通过光热、光伏电站内无功源无功分配原则完成站内无功设备的无功分配。算例分析表明:该控制策略能够充分利用同步发电机、光伏逆变器以及无功补偿设备的无功调控能力,实现光热-光伏系统无功补偿任务的优化分配,从而达到提高系统汇集母线电压稳定性和降低系统网损的目的。
Currently reactive power compensation strategies of CSP-PV hybrid system are mainly controlled independently for CSP power station and PV station.and there is a lack of coordinated control mechanism between them.The aim of the proposed work is to present a coordinated optimal control strategy of reactive power on CSP-PV hybrid system,which contains three parts.First,the reference values of reactive power are estimated by monitoring the voltage of central point.Second,the optimal reference values of reactive power for each power station at each point of common coupling(PCC)are calculated by DE-PSO algorithm.Third,reactive power distribution of equipment in the station is completed based on the principle of reactive power distribution.The simulation results show the control strategy fully utilizes the reactive power control capability of the synchronous generator,the photovoltaic inverter and the reactive power compensation device,which realizes the optimal distribution of the reactive power compensation task in the CSP-PV hybrid system,and improving the system integration bus voltage stability and reduces the network loss.
作者
董海鹰
张宏
陈钊
黄蓉
丁坤
Dong Haiying;Zhang Hong;Chen Zhao;Huang Rong;Ding Kun(School of Automation and Electrical Engineering Lanzhou Jiaotong University,Lanzhou 730070,China;School of New Energy and Power Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;State Grid Gansu Electric Power Research Institute,Lanzhou 730050,China;State Grid Linxia Electric Power Supply Company,Linxia 731100,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2021年第6期162-169,共8页
Acta Energiae Solaris Sinica
基金
国家电网公司科技项目(SGGSKY00FJJS1800140)。
