分布式光伏电站机械逆变器无差拍控制  

Dead-beat Control of Mechanical Inverters in Distributed Photovoltaic Power Plant

作　　者：呼木吉乐图 Humujiletu(Inner Monglia Branch of Beijing Jingneng Clean Energy Co.,Ltd.,Hohhot 010000,China)

机构地区：[1]北京京能清洁能源电力股份有限公司内蒙古分公司,内蒙古呼和浩特010000

出　　处：《微型电脑应用》2024年第11期238-241,共4页Microcomputer Applications

摘　　要：无差拍控制能够有效地减少电网与逆变器之间的功率波动、电压谐波等问题,提高光伏电站的发电效率和电网稳定性。为此,提出分布式光伏电站机械逆变器无差拍控制。在确保输出电流工作在平衡点的基础上,计算分布式光伏电站平均输出电流。结合平均输出电压和平均输出电流计算结果,获取相对稳定的功率表达式。通过控制机械逆变器电压和频率,利用泰勒公式计算下一次采样周期,以实现机械逆变器无差拍控制。实验表明,所提方法的谐波畸变率处于0.01以下,能够准确控制机械逆变器,确保光伏电站运行稳定。Dead-beat control can effectively reduce power fluctuations and voltage harmonics between the power grid and inverter,and improve the generation efficiency and power grid stability of photovoltaic power plant.Therefore,a distributed photovoltaic power plant mechanical inverter dead-beat control is proposed.On the basis of ensuring that the output current operates at the equilibrium point,this paper calculates the average output current of the distributed photovoltaic power plant.A relatively stable power expression is obtained by combining the calculation results of average output voltage and average output current.By controlling the voltage and frequency of the mechanical inverter,the Taylor formula is used to calculate the next sampling period to achieve dead-beat control of the mechanical inverter.The experiment shows that the harmonic distortion rate of the proposed method is below 0.01,which can accurately control the mechanical inverter and ensure the stable operation of the photovoltaic power plant.

关 键 词：分布式光伏电站 机械逆变器 无差拍控制 直流母线 谐波畸变 

分 类 号：TH-39[机械工程] TM464[电气工程—电器]