Research On The Control Technique Of Flexible Networking For Distributed New Energy

In the new energy sources power generation field, a set of interface device forflexible grid connection is studied. The available operation control strategy ofaccessing PV power generation system to distribution network is described deeply.According to the operation situation of the voltage of the system which is connected,participating in the operation situation of distribution network to do the reactivepower optimization, optimize the performance of the whole system.Firstly, the paper analyzes the theory of the interface device about the newenergy sources distributes flexible grid is described in the first part. Then I study theworking principle of PV power generation system, used the simplified mathematicalmodel of PV cell to research every grid current control algorithm emphatically.Comparing the pros and cons of several maximum power tracking control algorithm,the suitable MPPT control strategy is put forward for the model in the paper. Theboost circuit is designed for verifying its correctness.Then, the paper carries on the simulated analysis of the interface device. I studythe relevant control strategy, including the PLL phase-locked loop controltechnology, two-loop decoupling strategy of PI, sine pulse width modulationtechnology and so on. I construct a10kW three-phase PV system simulation model,I simulate and analyze the control strategy.Finally, I experiment verification followed on. I set up a hardware platform ofthe interface device about the renewable energy sources distributed flexible grid. Icombine with the theory and simulation analysis for designing main circuit, designthe distribution network optimization of control strategy and monitoring and controlsystem which is used by the human-computer interaction operation. The correctnessfor the theoretical analysis and the simulation analysis were also verified.