The Wind-Solar Power Generation Technology Research Based On Pumped Storage Power Station

Nowadays, because of the growing depletion of traditional fossil fuels and the deterioration of environment, new energy resources have achieved a rapid development. Especially in recent years, wind- solar energy resources have developed in a rapid speed by virtue of its advantage of clean and renewable. Though China’s wind power and photovoltaic power generation have developed rapidly, with the sharp increase in grid installed capacity, a large number of embarrassing phenomenon as abandoned electricity has appeared. In order to further improve the utilization of wind-solar resources, and to smooth wind power and photovoltaic power generation,this paper mainly discusses the complementary between wind and solar energy resources and the advantages of energy storage device and joint operation system of wind-solar energy.Firstly, this paper analyzes the current development of wind power and photovoltaic power generation. The wind and photovoltaic power generation are characterized as "large base into the large grid", which resulting in that wind-solar energy resources can not be used locally, thus leading to a great number of electricity-abandoned phenomenon. Adding energy storage device into the power system can effectively improve the utilization of wind-solar resources. China’s wind power and photovoltaic power generation are mostly concentrated in the Northeast,the Northwest and the North China, Taking fully advantage of complementary strengths of wind and photovoltaic power generation in time and geography, one can reduce storage capacity of the device and improve the utilization of wind-solar resources. Considering the current development of wind power and photovoltaic power generation, based on the complementary of wind-solar energy and the combination of pumped storage power station, this paper established a wind-light-water-fire joint operation modal, aiming at minimum coal consumption.According to the relationship between power balance and frequency, this paper will adapt equality constraints theory instead of the power balance constraints.PSO algorithm is easily trapped in the local optimum. The application of mutation mechanism of genetic algorithm into particle swarm algorithm can effectively improve the diversity of particles and avoid local optimum. In dealing with practical problems, the traditional penalty function method is difficult to value penalty factors.Thus this paper proposes a per-unit processing method against adaptability function and penalty function, the simulation results show a better convergence. This paper will present how to improve the application of particle swarm optimization algorithm in the wind-light-water-fire joint system, and will propose how the location pumped storage power station affect the joint operation system in the simulation model. The results show that constructing pumped storage power in the power center can effectively improve the utilization of wind-solar resources, but it is difficult to exploit its regulating advantage. Nevertheless if the pumped storage power station is located in the load center, it will have a better effect in terms of load regulation and reservation, but will cause electricity-abandoned phenomena.On the whole, the introduction of pumped-storage hydroelectricity system can not only effectively improve the utilization of wind-solar resources and transmission-distribution system, also can smooth the instability of wind power and photovoltaic power generation, as well as improve the comprehensive benefits of power system operation. The location of pumped-storage power station, in the power station or the load center, should be decided on each particular situations.