Multi-objective dynamic scheduling method for wind-storage-water-thermal power system based on multi-source complementarity

Abstract

The invention discloses a multi-target dynamic scheduling method for a wind storage hydrothermal power system based on multi-source complementation, and the method comprises the following steps: 1, building a multi-target dynamic economical scheduling model: 1.1, building four optimization targets: take the minimum thermal power coal consumption, the minimum thermal power output adjustment volume, the maximum thermal power generation and the minimum load fluctuation after the thermal power is inputted to a power grid; 1.2, determining the constraint conditions of the four optimization targets; 2, carrying out the weighting and conversion of the four optimization targets, and obtaining a target function F of the multi-target dynamic economical scheduling model; 3, combining with the target function F, and solving the multi-target dynamic economical scheduling model through employing the improved plant growth simulation algorithm. According to the invention, the method gives full consideration to the economical performance and stability of thermal power operation, the utilization rate of the wind power and hydropower and the adjustment effect of a pumped storage power station, and guarantees the economical performance and stability of operation of the thermal power generating unit while promoting the consumption of the wind power.

Description

technical field [0001] The invention belongs to the technical field of power system optimization dispatching, and relates to a multi-objective dynamic dispatching method of a wind-storage-water-thermal power system based on multi-source complementarity. Background technique [0002] The large-scale connection of wind power to the power grid is of great significance to the energy saving and emission reduction of power operation and the sustainable development of the economy and society. challenge. The existing joint dispatch mode of wind power and thermal power can easily sacrifice the economy and efficiency of thermal power operation with the increase of the proportion of wind power grid connection, and configuring large-capacity energy storage systems for wind power is an effective measure to improve the quality of wind power output and promote wind power consumption. Among various energy storage systems, pumped storage has the advantages of large capacity, mature technolo...

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Problems solved by technology

[0003] 1. Optimization of wind-storage combined operation mode: Discuss the coordination of wind-storage capacity and how to use pumped storage to increase the penetration rate of wind power. Most of these studies are aimed at independent and autonomous island micro-grids, which need to meet the geographical advantages of wind-storage combined operation; 2. Maximization of wind-storage combined operation benefits: This type of research is based on the day-ahead power market trading environment. Under the incentive mechanism of peak and valley electricity prices, the economic benefits of wind-storage combined operation are optimized. "Valley", the wind storage is independent of the whole system, and the discussion is limited to the economics of the joint operation of the two, and the impact on the overall operation of the power system and the consumption of clean energy power are not involved; 3. The joint economy of wind storage and thermal energy Scheduling: This type of research involves wind-storage combined with thermal power to participate in dispatching. Although thermal power dispatching is integrated, the current research is still at the level of wind-storage combination. The characteristics and the improvement of the operating efficiency of traditional units and the improvement of clean energy consumption capacity are less considered. How to formulate a wind storage and fire coordination operation mechanism from the system dispatching level to achieve efficient and stable operation of thermal power units while improving wind power utilization is the problem. Problems to be solved in class research

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