Heating-power system joint economic scheduling method by using heating network energy storage features

Abstract

The invention discloses a heating-power system joint economic scheduling method by using heating network energy storage features. Influences of heating network energy storage on a thermoelectric unitare analyzed; constraints when the heating network keeps safe and stable operation after the thermoelectric unit changes a heating supply extraction flow are determined; according to specific reasonsfor wind curtailment generation by a power system containing a high proportion of thermoelectric units, a heating-power system two-stage scheduling policy considering the heating network energy storage is made; the system safety risk cost caused by wind power uncertainty is calculated; and a heating-power system joint economic scheduling model in consideration of heating network heat storage and wind power uncertainty cost and with the minimum wind curtailment amount as a target is built; and a fast particle swarm optimization algorithm is adopted to solve the model. The method of the invention can improve the peaking capability of the thermoelectric unit, the two-stage thermoelectric unit scheduling policy is adopted according to the specific wind curtailment reasons of the system in theheating supply stage, and system wind curtailment is thus reduced; and during the thermoelectric unit scheduling process, the wind power uncertainty is quantified as the risk cost and is added to a scheduling objective function, and the system operation cost and the risk can be coordinated.

Description

technical field [0001] The invention relates to the technical field of joint dispatching of heat-electricity systems, in particular to a joint economic dispatching method of heat-electricity systems that utilizes the heat storage function of a heat network and takes into account the uncertain cost of wind power. Background technique [0002] The heating system is mainly composed of four parts: the thermal power plant, the heating unit of the heating network, the heat transfer unit of the heating network and the heat user. Among them, the heat transfer unit of the heat network includes a large number of pipelines and heat exchange equipment, and has a large-capacity energy storage function. Utilizing the energy storage characteristics of the heating network, during the heating peak period, the thermal power unit can adjust the heating and extraction steam volume in a short time under the premise of meeting the heating demand, and improve the peak-shaving capacity of the unit....

AI Technical Summary

Problems solved by technology

[0007] At present, the main ways to improve the wind power consumption capacity of the power system with a high proportion of thermal power units include adding peak-shaving power sources, cross-regional transmission, electric heating, or installing energy storage equipment. Little consideration is given to the influence of wind power's own uncertainty on dispatching results

Images