Wind power uncertainty-considered electricity-heat combined system economic dispatching method

An uncertainty, joint system technology, applied in the field of power system, can solve the problem of not considering the uncertainty of wind power

Pending Publication Date: 2019-10-15
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

[0003] For the current dispatching method of combined powe...

Method used

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  • Wind power uncertainty-considered electricity-heat combined system economic dispatching method
  • Wind power uncertainty-considered electricity-heat combined system economic dispatching method
  • Wind power uncertainty-considered electricity-heat combined system economic dispatching method

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Embodiment Construction

[0128] Such as figure 1 As shown, in the combined electricity-heat system structure of this implementation case, the power system includes the thermal power unit G1, the wind farm WF, the transmission line and the electric load ED, and the thermal system includes the heat supply pipeline, the heat recovery pipeline and the heat load HD, The electrothermal coupling elements are combined heat and power unit CHP, electric boiler EB and circulation pump; the power and thermal networks are connected through coupling elements, and the power system and thermal system are coupled to each other due to the relationship between electrothermal coupling devices to form an electric-thermal combined system.

[0129] An economic dispatching method of combined power-heating system considering the uncertainty of wind power includes the following steps:

[0130] (1) A wind power uncertainty modeling method is proposed to generate deterministic scenarios and effectively deal with wind power uncer...

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Abstract

The invention discloses a wind power uncertainty-considered electricity-heat combined system economic dispatching method. According to the economic dispatching method, firstly, the uncertainty of windpower is processed by adopting a multi-scene method; secondly, a generalized benders decomposition method is adopted to consider the electricity-electricity of the wind power uncertainty; the economic dispatch problem of the heat united system is divided into a power system sub-problem and a heat supply network main problem. Wherein the power system sub-problem is a power system scheduling modelbased on multiple wind power scenes, and the heat supply network main problem is a heat supply network constraint problem considering network thermal delay and building thermal inertia. The method comprises the following steps: solving a power system sub-problem to obtain unit output and electric boiler power, verifying a unit output result by using a heat supply network main problem, and if not,adding constraints of a combined heat and power generation unit and an electric boiler to the power system sub-problem to carry out iterative solution. According to the method, the uncertainty of windpower is considered more finely during thermal joint scheduling, and the method is of great significance in improving the scheduling economy and maintaining the safety of a power system.

Description

technical field [0001] The invention relates to the technical field of electric power system, in particular to an economic dispatching method of electric-heat combined system considering the uncertainty of wind power. Background technique [0002] Renewable energy has the characteristics of intermittent and anti-peak regulation, and thermal power units must follow the principle of "heating to determine power", which makes the problem of peak regulation more difficult, and wind curtailment is used as an adjustment method in more and more cases. Cogeneration of heat and power makes full use of the waste heat in steam, which saves 20%-30% of energy compared with separate heat and power generation. The combined heat and power boiler has a large capacity and a high dust removal rate, which can effectively reduce pollution. Combined heat and power is mainly used for heat supply, and waste heat is used for power generation. Combined heat and power has a high energy utilization ra...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q10/04G06Q10/06G06Q50/06
CPCG06Q10/04G06Q10/06312G06Q50/06G06F30/20Y04S10/50Y02E40/70
Inventor 张鹏王磊
Owner SOUTHEAST UNIV
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