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Day-ahead robust coordinated optimization scheduling method for pneumoelectric combined system

A joint system, coordinated optimization technology, applied in the direction of power network operating system integration, system integration technology, AC network voltage adjustment, etc., can solve problems such as coordination research of natural gas storage equipment without gas-fired units

Inactive Publication Date: 2020-12-01
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, there is no coordination study among gas-fired units, power-to-gas equipment, and natural gas storage equipment

Method used

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  • Day-ahead robust coordinated optimization scheduling method for pneumoelectric combined system
  • Day-ahead robust coordinated optimization scheduling method for pneumoelectric combined system
  • Day-ahead robust coordinated optimization scheduling method for pneumoelectric combined system

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0320] Example 1: A deterministic example that does not include power-to-gas equipment, that is, does not consider the uncertainty of power load and wind power generation.

example 2

[0321] Example 2: Consider a power-to-gas plant in Example 1.

example 3

[0322] Example 3: Coordinated scheduling considering robust optimization in Example 1.

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Abstract

The invention discloses a day-ahead robust coordinated optimization scheduling method for a pneumoelectric combined system. The gas turbine units located at the same geographic position are arranged.The electricity-to-gas conversion equipment and the natural gas storage equipment are modeled into an energy hub; the robust optimization model of the pneumoelectric combined system is solved througha main problem-sub problem framework of a CCG method; nonlinear natural gas constraints are subjected to linearization processing through piecewise linearization and are added to the main problem forsolving; in addition, a double-layer safety check sub-problem is converted into a single-layer bilinear problem, then the single-layer bilinear problem is rewritten into a mixed integer programming form through an extreme point method, and simulation analysis shows that the electricity-to-gas conversion equipment can effectively reduce the wind curtailment rate by converting surplus wind power generation into natural gas. The robust optimization model can guarantee the operation safety of the pneumoelectric combined system under the condition that the power load and the wind power generation are uncertain, and generally, more units are invested to provide enough system climbing capacity.

Description

technical field [0001] The invention belongs to the technical field of optimized operation of an integrated energy system, and in particular relates to a method for robust coordination and optimal scheduling of a combined gas-electricity system. Background technique [0002] For a power system containing a large number of gas-fired units, the power generation plan and cost of power system will be directly affected by the price of natural gas or the cost of natural gas production. Moreover, the reliability and security issues of electric energy supply will be highlighted when the electric load and natural gas load reach the peak at the same time. In addition, the outage of natural gas wells and safety accidents of natural gas pipelines will not only lead to the forced outage of multiple gas-fired units, but also face natural gas system operators with more fluctuating loads from gas-fired units, because frequent adjustments to gas-fired units are required to stabilize Uncerta...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/06H02J3/46H02J3/14G06Q10/06G06F17/11
CPCG06F17/11G06Q10/06312H02J3/06H02J3/003H02J3/004H02J3/144H02J3/466H02J2203/10H02J2203/20H02J2300/40Y02B70/3225Y02E10/76Y02E40/70Y04S10/50Y04S20/222
Inventor 何川吕祥梅刘天琪
Owner SICHUAN UNIV
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