基于偏差控制的两级式光伏系统有功调度策略  

Active Power Qispatch Strategy of Two-stage Photovoltaic Inverter Based on Deviation Control

作　　者：赵建荣 王林 张海龙 李瑞生[2] ZHAO Jianrong;WANG Lin;ZHANG Hailong;LI Ruisheng(Xi’an XJ Power Electronics Technology Co.,Ltd.,Xi’an 710077,Shaanxi,China;XUJI Group Corporation,Xuchang 461000,Henan,China)

机构地区：[1]西安许继电力电子技术有限公司,陕西西安710077 [2]许继集团有限公司,河南许昌461000

出　　处：《电气传动》2017年第5期54-57,共4页Electric Drive

摘　　要：针对两级式光伏发电系统,提出一种新型的有功调度控制策略,可以实现两级式光伏逆变器有功功率的快速平滑调度:正常运行时,前级升压斩波电路(Boost)进行最大功率点跟踪(MPPT),后级逆变器负责母线电压的控制;当有功调度指令下发时,逆变器放弃母线电压控制权,去控制输出功率下降到调度值,此时母线电压会升高,Boost电路则由MPPT控制转入母线电压控制,两级控制互不干扰,无缝切换。详述了该控制策略,并通过仿真和试验进行验证,结果验证此控制策略的可行性。Aiming at two-stage photovoltaic power generation system,a new strategy of active power dispatch control was presented.The strategy could achieve quickly scheduling of two-stage photovoltaic inverter active power:when normal running,the boost chopper achieveed maximum power point tracking(MPPT)and the inverter had to be responsible for bus voltage control;when the active power dispatch instructions issued,inverter gave up bus voltage control and turned to control the output power decreased to the control value,at this time,the bus voltage would be rising,so the boost chopper circuit would turn to control bus voltage instead of MPPT control.Two stages′control strategies did not interfere with each other.The control strategy was described in detail,then the simulation model and test platform were set up to verify the feasibility of this control strategy.

关 键 词：两级式光伏系统 有功调度 电压偏差控制 最大功率点跟踪(MPPT) 

分 类 号：TM615[电气工程—电力系统及自动化]