摘要
通过建立光伏逆变器接入配电网稳态分析模型,以接入点运行电压、最大运行电流和SPWM调制控制条件为约束,分析了不同工况下逆变器的无功调节能力。构建接入配电网运行时面向电网电压调整的无功功率控制策略,该策略以控制接入点电压为目标,逆变器通过补偿系统需求的无功对电压进行支撑。构建分布式光伏接入配电网应对配电网负荷变化和光伏注入功率变化引起的电压无功调整仿真实验,验证了该策略的有效性。
In this paper, a steady-state analysis model of photovohaic inverters connected to the distribution network is built. With the PCC operating voltage, maximum running current and SPWM modulation control as constraints, the paper studies the reactive power regulation ability of the inverter under different operation conditions. The reactive power control strategy facing the grid voltage regulation connected to the distribution network is proposed, aimed at controlling the PCC voltage and supporting the voltage by compensating the reactive power the system needs. The simulation experiment of voltage and reactive power regulation in different load variations and PV injected power variations for the distributed photovoltaic power generation system connected to the distribution network has verified the effectiveness of the proposed strategy.
出处
《电网与清洁能源》
2013年第8期88-93,共6页
Power System and Clean Energy
基金
国家自然科学基金面上项目(51277024)~~
关键词
无功调节
配电网
接入点电压
分布式光伏
reactive power regulation
distribution network
PCC voltage
distributed photovoltaic power generation system
