Combined heat-electricity optimization scheduling method based on heat storage efficiency of heating pipe network

Abstract

The invention relates to a heat supply pipe network thermal storage efficiency-based thermal-electric joint optimal dispatching method and belongs to the multi-energy coupling electric power system operation and control technical field. The method of the invention includes the following steps that: a thermal-electric joint optimal dispatching model considering concentrated heat supply pipe network thermal storage characteristics is built, wherein the model is composed of an objective function and constraint conditions, wherein the objective function is to minimize the total cost of the operation of a thermal-electric joint system, and the constraint conditions include a power system operation constraint condition and a heat supply system operation constraint condition, wherein the heat supply system operation constraint condition contains a concentrated heat supply system model reflecting the concentrated heat supply pipe network thermal storage characteristics; and the thermal-electric joint optimal dispatching model is solved through an iterative solving algorithm, and an obtained result can be applied to thermal-electric joint optimal dispatching. According to the method, the thermal storage efficiency of a heat supply pipe network is considered in the optimal dispatching problem of a power system, and the peak regulation characteristic of the pipe network is fully utilized, and the problem of large amount of wind curtailment during a heating period in the winter in northern China can be solved.

Description

technical field [0001] The invention belongs to the technical field of operation and control of a power system coupled with multiple energy sources, and in particular relates to a combined heat-electricity optimization scheduling method based on the heat storage efficiency of a heating pipe network. Background technique [0002] my country's 10-million-kilowatt-level wind power bases are mainly located in the cold northern regions, and the main way of heating in winter in northern regions is large-scale combined heat and power centralized heating. At present, the combined heat and power units in the north of my country mainly operate in the mode of "power determined by heat", that is, the power generation output of the combined heat and power unit depends on the heating load. During the winter heating period, in order to ensure that the heating demand is met, a large number of combined heat and power units operate at the minimum technical output state. Restricted by the "he...

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Problems solved by technology

The obvious defect of this method is that the minimum output of the combined heat and power unit limits the wind power output, which in turn leads to wind curtailment.

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