Research On Reliability And Economics Analysis Of Distribution System With Renewable Energy Generation By Considering The Configuration Design

With the continuous development of energy economy transformation and power system reformation, the share of renewable energy generation has been increasing as a result of the world-wide concern on environmental deterioration and climate change associated with burning fossil fuel. The installed capacity of renewable energy generation also has been a rapid growth in the world. Specifically, distributed renewable energy generation plays an important role in reducing the burden of power supply and improve the reliability of the power system.This paper combines technique with management and designs the system structure and distribution system. First, it divides the distribution system based on the node model. Then five scenarios are designed to analyze the reliability and economic influence of the different access structures for the distribution system. Second, this paper selects the 4th main feeder of IEEE-RBTS Bus 6 system as a case study, simulates the operation state of distribution system with renewable energy generation through sequential Monte Carlo simulation method and evaluates the reliability of distribution system with renewable energy generation. Third, the comprehensive benefit of the renewable energy generation and energy storage is evaluated by the method of cost benefit analysis. The economy is analyzed with the benefit aspects of energy saving, emission reduction, reliability, reducing loss, delay of power grid investment and net price subsidies. At last, it establishes the multi-objective optimization model of power system that contains renewable energy generations, provides the Pareto optimal frontier which is based on the adaptive multi-objective particle swarm optimization algorithm and finally seek the optimal balance between reliability and economy.The results show that the reliability of the power system which connects the renewable energy generation at the tail end is higher than that in the other locations. The more numbers of renewable energy generation, the higher reliability of the power system is. And the energy storage can smooth the output of renewable energy generations and increase power system reliability. Moreover, the economic evaluation gets the same results as the reliability evaluation. The economy of the power system which connects the renewable energy generation at the tail end and combines with the energy storage is superior. Then multi-objective optimization obtains the optimal solutions, and the specific optimization allocation of renewable energy generations need to select the best solution from the optimal solutions according to the personal preferences of decision makers.