| Due to the decreasing fossil source energy and increasingly serious environmental pollution,developing renewable energy,like wind energy and solar energy,has become an inevitable choice for long-term sustainable development of human society.Negative impacts will be posed upon the operation of distribution networks by fast growing integration of renewable distributed generations.Research on the maximum hosting capacity of distributed generations has great significance for the planning and operation of distribution networks as well as the development of distributed generations.Considering the comprehensive influences of distributed generation on distribution networks,this paper makes thorough and systematically studies on the maximum hosting capacity of distributed generations.Firstly,modeling and simulation of grid-connected distributed generations is realized,including the modeling of different types of distributed generations and their influences on distribution networks.Secondly,a maximum hosting capacity model of grid-connected distributed generations is established,with constraints of node voltage,line capacity,and total harmonic voltage distortion,short-circuit current.According to the characteristics of distributed generations,we propose an improved Big Bang-Big Crunch algorithm to solve this problem.The validity of the model and algorithm is verified by comparing with other existing algorithms,like Genetic Algorithm and Particle Swarm Optimization algorithm.At last,a maximum hosting capacity model of grid-connected distributed generations based on Integrated Resource Strategic Planning is studied.Based on the thinking of Integrated Resource Strategic Planning,the maximum social benefits optimization model is established,considering the construction and operation costs of distributed generations,demand response costs,grid loss reduction benefits and environmental benefits.And the IEEE 33 system example is employed to test the validity of the above methods. |
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