Combined heat and power optimization method and system for promoting wind power consumption

Abstract

The invention provides a combined heat and power optimization method and system for promoting wind power consumption. The method comprises the steps that heat demand values of heat supply areas are predicted, and pipe network heat losses of heat network connection areas are obtained; according to the heat demand values and the pipe network heat losses, a thermoelectric coupling model of a thermoelectric cogeneration unit is established, a power generation scheduling model is established according to output power prediction values of a thermal power generating unit and a wind power plant; according to the thermoelectric coupling model, the power generation scheduling model, thermal equipment, power load and heat load, a combined heat and power optimization model is established; according to the combined heat and power optimization model, heat supply plans of the thermoelectric cogeneration unit and the thermal equipment and power generation plans of the thermal power generating unit and the wind power plant are determined. Compared with the prior art, the combined heat and power optimization method and system for promoting wind power consumption weakens a power grid dispatching mode of ordering power by heat, improves the peak load regulation capacity of a power grid, further effectively consumes wind power and decreases waste wind power quantity.

Description

technical field [0001] The invention relates to the technical field of power grid dispatching control, in particular to a heat and power combined optimization method and system for promoting wind power consumption. Background technique [0002] Wind energy is a renewable and clean energy with the advantages of large reserves and wide distribution. However, the problem of wind power consumption is becoming more and more prominent, and the phenomenon of wind abandonment is gradually increasing. The main reasons include: [0003] 1. Wind power output is unstable in time, unbalanced in space, and has characteristics such as randomness, volatility, and reverse peak regulation. [0004] 2. Conventional thermal power units are mainly heating units, and the adjustment range of their power generation output is significantly reduced during the heating period. At the same time, if the power grid dispatching method of "heat-based power" is adopted during the heating period, the thermal...

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Problems solved by technology

[0003] 1. Wind power output is unstable in time, unbalanced in space, and has characteristics such as randomness, volatility, and anti-peak regulation

[0004] 2. The conventional thermal power unit is mainly a heating unit, and the adjustment range of its power generation output is significantly reduced during the heating period

At the same time, if the power grid dispatching method of "heating power" is adopted during the heating period, the thermal power unit will basically not participate in the peak regulation of the power grid, which will reduce the peak shaving capacity of the power grid

[0005] 3. Conventional combined heat and power units take heating demand as the main goal, fail to give full play to the benefits of combined heat and power, fail to fully consider the thermoelectric characteristics of combined heat and power units to improve their overall energy efficiency, and fail to fully tap the role of combined heat and power units in system peak regulation and Potential role in improving new energy acceptance capacity

However, in the traditional power system optimization strategy, the heat supply side of the thermal power unit is regarded as the external boundary, and the coupling constraints of the thermal power output of the thermal power unit and the influence of the introduction of flexible heat sources cannot be considered.

At the same time, in areas where central heating is used during the heating period, a thermal power plant is usually responsible for the heat supply in a certain heating area. Different thermal power plants have different heat supply and power generation efficiencies, and it is difficult to make use of the economical and economical characteristics of combined regional heating in the division of separate heating areas. safety

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