摘要
作为分布式电源的光伏在数字化主动配电网中得到广泛应用。现有的光伏主要工作在最大功率跟踪模式,在功率过剩的情况下,可能导致并网点电压波动,严重时导致母线电压偏离标准,阻碍了光伏在数字化主动配电网中的应用,因而实现光伏的主动支撑功能、提升光伏逆变器的可调度性,成为分布式电源在数字化主动配电网中的应用趋势。因此,本文提出一种光伏逆变器电压自适应调节的方法,通过有功无功联合调控,实现并网模式下光伏逆变器对电压的主动支撑,最后在MATLAB/SIMULINK平台建立光伏逆变器仿真模型,验证了方案的有效性。
As a distributed power source, photovoltaics are widely used in digital active distribution networks.The existing photovoltaics mainly work in the maximum power point tracking mode.In the case of excess power, it may cause voltage fluctuations at the grid connection point.In severe cases, the bus voltage may deviate from the standard, which hinders the application of photovoltaics in digital active distribution networks.Hence, realizing the active support function of photovoltaics and improving the schedulability of photovoltaic inverters has become the application trend of distributed power in the digital active distribution network.Therefore, this paper proposes a method of voltage self-adaptive regulation of photovoltaic inverters, which can realize the active support of photovoltaic inverter to voltage in grid-connected mode through the joint regulation of active and reactive power.Finally, a simulation model of the photovoltaic inverter was established on the MATLAB/SIMULINK platform to verify the effectiveness of the scheme.
作者
刘夏宇
王振雄
易皓
卓放
LIU Xiayu;WANG Zhenxiong;YI Hao;ZHUO Fang(State Key Laboratoryof Electrical Insulation and Power Equipment(Xi’an Jiaotong University),Xi’an 710049,China)
出处
《河北电力技术》
2021年第5期1-5,19,共6页
Hebei Electric Power
基金
河北省省级科技计划资助项目(20314301D)。
关键词
数字化主动配电网
光伏逆变器
电压控制
主动支撑
digital active distribution network
photovoltaic inverter
voltage control
active support
