Optimal scheduling method considering wind power-heat storage unit-electric boiler combined operation

Abstract

The invention discloses an optimal scheduling method considering wind power-heat storage unit-electric boiler combined operation. The method comprises the steps of 1, establishing a wind power unit model, a thermal power unit model, a combined heat and power generation unit model, a heat storage unit model and an electric boiler model; 2, taking minimum system comprehensive cost as a target, constructing a wind power-heat storage unit-electric boiler combined operation optimization model, and configuring capacities of the heat storage unit and an electric boiler; 3, considering system constraints, unit constraints, heat storage and electric boiler constraints, predicting error cost constraints and environmental penalty cost constraints, and carrying out output configuration of each deviceof the system by taking lowest total cost of system operation as the target; and 4, when wind curtailment exists, enhancing the output of the heat storage and the electric boiler; and during valley wind, reducing heat storage and the output of the electric boiler, and increasing a wind power consumption capacity. In the method, the environmental penalty cost is added into the model, and a description method of thermal power and thermoelectric unit operation cost is improved so that a scheduling model is closer to an actual situation.

Description

technical field [0001] The invention belongs to the field of combined scheduling of electric power system and thermal system, and relates to an optimal scheduling method considering the combined operation of wind power-heat storage unit-electric boiler. Background technique [0002] With the depletion of primary energy such as coal and oil, the development and utilization of wind power has become an important measure for my country to build a clean, safe and efficient modern energy system and achieve the development goal of non-fossil energy. In recent years, the installed capacity of wind power in my country has developed by leaps and bounds, and the resulting problem of curtailed wind accommodation has become more and more serious. In the past three years, the abandoned wind rate has been above 10%, and the annual abandoned wind rate is 30 billion KWh. [0003] The reason for such a large amount of wind curtailment lies in the insufficiency of the regulation capacity of t...

AI Technical Summary

Problems solved by technology

In order to accommodate wind power, it is necessary to improve the power structure. Many people propose to introduce electric boilers or use heat storage units, but they cannot solve this problem well.

During the winter heating period in the "Three North" region, it is difficult for cogeneration units to perform peak regulation due to heating, resulting in a large number of abandoned wind when the load is low

[0004] At present, there are many domestic teams conducting relevant research. They usually only consider the operation cost of the entire system, but the environmental impact is also directly related to the economy of the entire system; and most systems only consider or control electric heat storage units or electric boilers. It will weaken the peak shaving and absorption capacity, and will also reduce the flexibility of the entire system

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