摘要
针对大型分布式电源并网特性研究的空白,就大型光伏电站内部各系统建模并分析,确立其数学模型,包括光伏电池函数、逆变器函数及控制系统函数,从而进一步分析其并网特性。研究了大型光伏系统在复杂电网环境中的输出电压、电流特性,故障状态下的低电压穿越能力,以及其他电能质量方面的问题。理论分析和实验结果证明了大型光伏电站满足电压波动、输出谐波等稳态特性和故障时动态无功补偿、低电压穿越能力、电压稳定等暂态特性要求。
Viewing the gap of studies with large-scale distributed power grid-connected characteristics,internal systems of large-scale photovoltaic plant are modeled and analyzed.Mathematical models including photovoltaic cells,inverters,control system functions are established,its grid-connected characteristics are studied further.Output characteristics of voltage,current,low voltage ride through and other power quality problems of large-scale photovoltaic system are studied emphatically in complicated grid.Theoretical analysis and experimental results prove that large-scale photovoltaic plant meets the steady state characteristics of voltage fluctuation,harmonic output,and reach the requirement of transient operation characteristics,dynamic reactive power compensation,low voltage ride through,voltage stabillty etc.when power grid faults happen.
出处
《电力电子技术》
CSCD
北大核心
2010年第6期61-63,共3页
Power Electronics
关键词
光伏电池
逆变器
电压控制
并网特性
低电压穿越
photovoltaic cell
inverter
voltage control
grid-connected characteristics
low voltage ride through
