The Analysis And Design On Micro-grid Experiment Systems

In the new century, the energy problem becoming the tough challenge in sustainable development, Smart grid provide the new effectively direction to solve the problem, however, because of technology, investment and other factors, to present the generalized Smart grid is impossibility, as a result, Micro-grid concept is proposed.The simple Micro-grid topological structure is containing distributed generation (DG), energy storage systems and variable load.According to the actual demand and design principle formative a small distribution grid. Although the composition is simple, but to realize intelligent control, the optimal environment benefit, economy benifit and management is still hard. It is related to distributed generation (DG), Micro-grid operation control, fault detection and protection, energy management, Micro-grid2modes operation seamless switching,which is favorable for the smooth operation mode transfer and other key technology. Based on the above problems,the main jobs of the thesis are as the following:1、Three control methods may beused in the Micro-grid, Master-slave operation method、Peer to peer operation method and Mix-operation method. Furthermore, this paper analyses three models with their own characteristics and applicable scope, their realization method and different requirements for the control mode.2、In order to meet the research of new energy and Smart grid,the thesis has proposed establishing a micro-grid laboratory design plan, and make a overview about the Micro-grid laboratory. The distributed generation contains photovoltaic power generation and Simulative Doubly-fed Wind Power Generation System, battery is energy storage device, and work together to maintain the Micro-grid smooth output. The paper focused on simulative Wind Power generation system,its Simulative Wind Power Generation System overview, network control system, master control system, simulative wind power generation system, inverter system, test system, power protection system,laboratory power system are have a detailed elaboration.3、The Purpose of this thesis is to establish the simulation Platform of Microgrid operationcontrol,and three typical Micro-grid control strategies which onsist of P/Q,V/f and Droop were established in Matlab separately.Based on the Principle of control strategies the model strueture and Parameter design were given.The experimental results show that the switch between the islanding operation and and grid-connecting mode smoothly.The switching process guarantees the uninterrupted supply of critical loads。...