Miero-grid Power Source Reliability, Cost-benefit Analysis

With increasingly nervous energy and environmental protection requirement unceasing enhancement, people pay more and moreattention of the distributed generation. Micro-grid system isan important part of the distributed generation ofpower system, there are more and more related research on micro-grid, and on the one hand, the reliability requirement is very important, on the other hand, improving the level of micro-grid power supply reliability for micro-grids are very beneficial to the further development. And it is necessary for increasing the reliability of the economic investment, so this paper mainly discusses how to realize the balance between reliability and economic.First, this paper study the basic principle of themicro-grid and distributed generation, characteristics and function, the operation mode of micro-grid is running independently and connecting to the power grid operation. Second, we study the basic principle of probabilistic production simulation which can using on the power system planning and power supply reliability index that is used to calculate the power generation system and units undertake the load, obtaining the micro network system in the planning stage, the calculation of reliability index and the method of generating unit.At the same time, the algorithm for the probabilistic production simulation example comparison, to determine what method is the best.By this calculation, on the one hand, we can evaluate the network reliability of the system, on the other hand, we can evaluate the loss of user of system by these reliability assessment, and the loss is measured by specific currencies, so also we can evaluate the scale of the power loss.After getting these data, planners can evaluate the planning scheme. This paper get the corresponding assessment reliability and economy balanced method by the analysis of reliability and economy equilibrium relationship. And through the example calculation, the relationship between the reliability and economy, the planning with reasonable reliability.