摘要
为了充分发挥并网逆变器结构及功能上的潜在优势,研究将滤波及无功补偿功能融入光伏电站逆变器中,同时实现有功并网、谐波抑制、无功补偿及电压补偿等多功能复用。在研究了逆变器控制策略以及微电网电能质量特性和控制方法后,对光伏电站拓扑结构进行了改进。在此基础上提出了一种基于逆变器动态剩余容量的无功分配策略,对并联逆变器和串联逆变器的控制策略进行详细讨论。运用该控制策略有效地实现了光伏规模化并网的电能质量复合治理,并用PSCAD/EMTDC软件通过实例仿真验证了控制策略的正确性和有效性。
To maximize the potential benefits of the structure and function of grid connected inverters and integrate the function of filtering and reactive power compensation into PV power plant inverters, while achieving multi-function reusing, such as active grid, harmonic suppression, reactive power compensation and voltage compensation. After researching the controlling strategies of inverter and power quality characteristics and controlling methods, the topology of PV power plant is improved, based on which the reactive power allocation strategy of dynamic stability margin of inverter is proposed, and the controlling strategy of shunt connected inverter and series connected inverter are researched in detail. The use of the controlling strategy mentioned above effectively implements the power quality complex governance of large-scale grid-connected photovoltaic, and the correctness and effectiveness of the proposed controlling strategy is verified by PSCAD/EMTDC.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2015年第3期107-112,共6页
Power System Protection and Control
基金
国家863高技术基金项目(2011AA05A107)
镇江市科技支撑计划项目(GY2011019)
国家电网公司项目(52110113091H
5211011400AX)
省级电网运行控制协调优化技术研究与示范~~
关键词
大规模光伏
电能质量
并联逆变器
串联逆变器
无功分配
large scale photovoltaic
power quality
parallel inverter
series inverter
reactive power allocation
