摘要
以逆变器输出端电压为切入点重新推导了并联功率理论,提出新的下垂控制策略。将光伏逆变器并联系统的下垂控制与三相光伏并网逆变器的模型预测控制相结合,由下垂控制部分实现并联逆变器输出有功、无功功率对其输出电压幅值及相位控制,并以此作为预测控制的参考电压信号,经优化后,选择最优控制量作用于三相光伏逆变器。实验结果表明,在空载投入负载,部分动力丢失情况下,该控制策略均能较好地实现对并联系统负载功率的均分及对各并联光伏逆变器的优化控制。
An improved power theory of parallel system is deduced based on output terminal voltage of an inverter, then a new droop control strategy is put forward.The droop control of parallel photovohaic（PV） inverter system and the model predictive control of three-phase PV grid-connected inverter are combined.The output active and reactive power of parallel inverters control the output voltage amplitude and phase, which is realized by the droop control part. It is regarded as reference voltage signal of predictive control.After optimization,the optional selection of control volume can be functioned on the three-phase PV inverters.Experimental results verify that the control strategy can realize the average of parallel system load power and the optimization control of parallel PV inverters better, which is under the conditions of loading and power loss.
出处
《电力电子技术》
CSCD
北大核心
2014年第1期6-8,共3页
Power Electronics
基金
国家自然科学基金(51277090)
辽宁省教育厅优秀科技人才支持计划(LR2013014)~~
关键词
逆变器
光伏
下垂控制
预测控制
inverter
photovohaic
droop control
predictive control
