Safety constraint unit combination calculation method considering direct current link line power optimization

A technology of connecting line power and unit combination, which is applied to AC network circuits, AC networks with energy trade/energy transmission authority, single-network parallel feeding arrangement, etc., and can solve the problem that DC transmission power adjustment should not be too frequent

Pending Publication Date: 2019-02-26
CHINA SOUTHERN POWER GRID COMPANY +1
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However, the DC system itself has many complex operation restrictions, and considering the equipment life and operating experie

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  • Safety constraint unit combination calculation method considering direct current link line power optimization
  • Safety constraint unit combination calculation method considering direct current link line power optimization
  • Safety constraint unit combination calculation method considering direct current link line power optimization

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[0051] In order to make the purpose of the invention, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0052] The present invention considers the safety-constrained unit combination calculation method of DC tie-line power optimization, including the following steps.

[0053] 1) Establish a DC linearization model

[0054]The DC system itself has power upper and lower limit constraints and adjustment rate constraints. At the same time, due to the deviation of the control system, the adjustment step size constraint is set. In addition, considering the equipment life and operating experience, the DC system usually focuses on...

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Abstract

The invention discloses a safety constraint unit combination calculation method considering direct current link line power optimization. The method comprises the steps that 1) a linearization model considering a direct current stable operation constraint, a power upper and lower limit constraint, an adjustment rate constraint, an adjustment step constraint and a power transmission constraint is established; 2) direct current power is equivalent to a node to be injected into and participate in the combination optimization calculation of a safety constraint unit; and 3) according to a optimization objective function, optimization calculation is carried out on direct current link line power and unit combination, and voidance is carried out to acquire unit combination and time-sharing direct current link line power arrangement and time-sharing node electricity price results. According to the invention, the method uses the power spot market as the background; for the operating characteristics of a direct current system, direct current link line power is involved in the combination optimization calculation of the safety constraint unit through reasonable modeling; and the objective function can be further optimized.

Description

technical field [0001] The invention is a safety-constrained unit combination calculation method considering the power optimization of a DC tie line, and belongs to the innovative field of clearing algorithms in the electric power market. Background technique [0002] Safety Constrained Unit Combination (SCUC) is the core link in the preparation of power generation plans in the spot market environment. It usually takes the minimum total power purchase cost as the optimization objective function, and considers various constraints of the power grid (such as the constraints of the generator itself, the constraints of the generator group, the system constraints, network constraints, etc.), the unit combination is optimized and calculated, and the unit combination arrangement and time-of-use node electricity price of the power grid within the analysis period (usually the next day) are obtained. SCUC is a mixed integer programming problem in mathematics. In large-scale practical s...

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Application Information

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IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/00H02J3/008H02J3/38H02J2203/20
Inventor 刘春晓苏寅生李智勇袁泉张蔷涂孟夫徐帆
Owner CHINA SOUTHERN POWER GRID COMPANY
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