Heat supply network heat storage characteristic-based electric-thermal system combined economic dispatching method

Abstract

The invention discloses a heat supply network heat storage characteristic-based electric-thermal system joint economic dispatching method. The method comprises the following steps of: establishing a dispatching target function by considering wind electricity access risk cost and taking minimum wind curtailment as a main target under the premise of carrying out heat supply network heat storage characteristic-based wind electricity-included electric-thermal system combined economic dispatching to satisfy a heat supply demand; determining a system constraint condition, a thermal-electric unit constraint condition, a straight condensing unit constraint condition and a heat supply network state constraint of the dispatching target function; calculating a heat supply amount and a wind electricity output of a system at the current stage; judging whether wind curtailment is generated due to limited wind electricity access ability of the system; if the judging result is positive, carrying out regulation and control by obeying a principle of wind power-first net play and adopting a dispatching strategy of carrying out thermal-electric unit continuous regulation to decrease heat supply streamextraction capacity of the unit; and if the judging result is negative, carrying out regulation and control according to a dispatching strategy of calculating wind curtailment possibility according to wind power outputs at the last time period and the current time period.

Description

technical field [0001] The invention relates to an electric-heat system joint economic scheduling method based on heat storage characteristics of a heat network. Background technique [0002] As a clean and renewable energy source, wind energy plays an important role in reducing environmental pollution and alleviating energy shortage. However, with the continuous increase of wind power penetration rate, its own characteristics such as intermittent and anti-peak regulation have brought great challenges to the dispatching of power systems containing wind power, especially in northern China, where the proportion of thermal power units is large, and the heating period The unit is limited by the rigid constraint of "heating to determine power", which reduces the system's peak-shaving capability, and the problem of wind abandonment is prominent. Contents of the invention [0003] In order to solve the above problems, the present invention proposes a joint economic scheduling me...

AI Technical Summary

Problems solved by technology

However, with the continuous increase of wind power penetration rate, its own characteristics such as intermittent and anti-peak regulation have brought great challenges to the dispatching of power systems containing wind power, especially in northern China, where the proportion of thermal power units is large, and the heating period The unit is limited by the rigid constraint of "heating to determine power", which reduces the system's peak-shaving capability, and the problem of wind abandonment is prominent

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