A Multi-level Control Method for Distributed Photovoltaic Access to User-side Microgrid Based on Chaos Theory
Because the user-side microgrid of distributed photovoltaic access is affected by environmental factors such as sunshine intensity and temperature,it has intermittency and instability,resulting in large fluctuation of voltage offset val-ue.Therefore,this paper designs a multi-level control method for distributed PV access to user-side microgrid based on chaos theory.By obtaining the operation data of the user-side microgrid of distributed photovoltaic access,extracting char-acteristic quantities such as power balance,voltage stability,and frequency fluctuation,the operation status of the user-side microgrid of distributed photovoltaic access is identified.Based on the characteristics of chaos theory,the control level is divided into local level and centralized level to adapt to the characteristics and operation requirements of different compo-nents in microgrid.The control sensitivity of each control level is further calculated to ensure the efficient transmission and accurate response of information between levels.Finally,through the implementation of micro-grid multi-level coordination control strategy,the collaborative work between photovoltaic power supply,energy storage system,load and other components is realized.The experimental results show that the multi-level control method of distributed photovoltaic access to user-side microgrid based on chaos theory keeps the voltage offset at a low level and is very stable over time,in-dicating that the proposed method has high performance advantages in controlling voltage offset and can effectively main-tain the stable operation of microgrid.
chaos theorydistributed photovoltaicaccess user sidemicrogridmulti-level control
万方数据
维普
