Optimal Dispatch of Wind Power, Photovoltaic Power, Concentrating Solar Power, and Thermal Power in Case of Uncertain Output

Min Xu, Yan Cui, Tao Wang, Yaozhong Zhang, Yan Guo and Xiaoying Zhang ()
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Min Xu: Economic Technology Research Institute of State Grid Gansu Electric Power Company, Lanzhou 730050, China
Yan Cui: Economic Technology Research Institute of State Grid Gansu Electric Power Company, Lanzhou 730050, China
Tao Wang: Economic Technology Research Institute of State Grid Gansu Electric Power Company, Lanzhou 730050, China
Yaozhong Zhang: Economic Technology Research Institute of State Grid Gansu Electric Power Company, Lanzhou 730050, China
Yan Guo: Gansu Dentsu Electric Power Engineering Design Consulting Co. LTD, Lanzhou 730050, China
Xiaoying Zhang: College of Electrical and Information Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Energies, 2022, vol. 15, issue 21, 1-18

Abstract: The integration of large-scale wind and photovoltaic power into modern power grids leads to an imbalance between the supply and demand for resources of the system, where this threatens the safety and stable operation of the grid. The traditional mode of grid dispatch and the capability of regulation of conventional thermal power units cannot satisfy the demands of grid connection for large-scale renewable energy, where the system requires the compensation and coordinated dispatch of flexible power sources. In light of this problem, this paper establishes a model to quantify the uncertainty in the forecasted outputs of wind and photovoltaic power. This is used to develop forecasts of the output of wind and photovoltaic power for several groups of scenarios, and predictions with the best complementarity are selected as a typical set of scenarios by means of their generation, reduction, and combination. By taking full advantage of the complementarity in the rates of regulation of conventional thermal power and concentrating solar power (CSP), a coordinated model of dispatch for wind power, photovoltaic power, CSP, and thermal power is established for a number of typical combinations of scenarios. The influence of uncertainty in the outputs of wind and photovoltaic power on the dispatch of the power grid is examined, and different modes of dispatch are formulated through simulations to analyze the superiority of the dispatch strategy proposed in this paper in terms of abandoned wind quantity, abandoned solar quantity, and the cost of dispatch.

Keywords: wind power; photovoltaic power; concentrating solar power; uncertainty in outputs of wind and photovoltaic power; martingale model; two-stage optimization; random scheduling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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