Coordinated Optimal Dispatching Of Peak Load Shifting By Wind-Photovoltaic-Storage Combined Systems

As drying up of global fossil energy,the energy crisis is threatening the survival and development of human society.Wind power and photovoltaic power generation technology is increasingly mature,large-scale development and the use of these renewable energy to become the effective method to solve the problem of environment and energy.Howeverr,the large capacity of wind power,photovoltaic power output has stochastic volatility and intermttent faults,can cause many adverse effects to the power system,challenge the existing power grid scheduling the inherent way,How to efficiently use the clean energy while minimizing the impact on power grid caused by the wide attention of scholars at home and abroad.Large-scale energy store system for its charge and discharge policies,joint wind farms and photovoltaic power plants to the power supply system that can effectively limit wind power and apotovoltaic power generation output power volatility and intermittent,is conducive to safe and stable operation of large power grids.Pumped storage energy storage system with its fast response,real-time scheduling ability,clean,efficient extensive research by scholars at home and abroad,but technical limitations of geography and pumped storage resocurce factors,the limited range of applications,not large-scale promotion applications.With the innovatirve new high-capacity battery energy storage technology,modular,,fast,high degree of commercialization of battery energy storage system not only solved the pumped storage geographical constaints have defects,but also for large-scale wind pwer photovoltaic power generation Internet provides a response a new idea.This paper established a joint clipping wind-photovoltaic-battery optimization scheduling model of coordination and consider joint scheduling model wind-photovoltaic-battery TOU two scheduling models in wind-photovoltaic-battery clipping joint coordination in scheduling optimization model Na/S battery energy storage system comprising introducing hydro powter,thermal power,wind power,photovoltaic power generation system,the development of a Na/S battery,wind power and photovoltaic power generation and peak-valley time period two scheduling strategies,and the establishment of more than two joint wind-photovoltaic-battery and fire and water turbines clipping economic output steady target scheduling model.In considering the wind-photovoltaic-battery TOU joint scheduling model,considering the revenue from electricity sales under the TOU,departing declare plans to contribute penalty costs and reduce the amount of abandoned wind and abandon the amount of light and other factors,will satisfy the constraints of the system maximum payload of expected returns and variance as a minimum objective function.For many problems exist MOPSO algorithm is proposed MOPSO improved algorithm,the final through the case analysis to verify the rationality and validity of the model.Traditional multi-objective particle swarm algorithm sorting present during "slow chain"problem proposed an improved fast non-dominated sorting algorithm,and improved adaptive inertia weight,mutation strategy to introduce multi-objective particle swarm algorithm to solve the algorithm search process "premature" problem,and finally fuzzy optimization method to select a compromise solution,as a model for the final result of the scheduling.By standard test functions to verify the accuracy of the improved algorithm.In the United clipping coordination wind-photovoltaic-battery optimization scheduling model by comparing numerical example whether the Na/S battery energy storage system on different wind-photovoltaic clipping effect influences.The results showed that:through the rational control of the Na/S battery energy storage system charge and discharge policies,so that the United wind-photovoltaic-battery into stable adjustable output power,peaking participating in the system,in favor of a smooth curve payload,both to improve the wind power and photovoltaic power generation utilization,but also reduce the frequency and adjust fire and water turbines to increase the total economic cost of fire and water turbines,safety and stability of the system is improved.In considering the wind-photovoltaic-battery TOU joint scheduling model,the use of Na/S battery energy storage system will load low hours wealthy wind power and photovoltaic power generation into the shortage of electricity at peak hours,and the combined system improves output power and power curve plan match level,in favor of a smooth curve payload,a good track load curves,and has obvious advantages in improving the overall economic efficiency and system stability.