Calculation method and system for security constrained unit commitment of alternating current and direct current hybrid power grid

A technology of AC-DC hybrid connection and unit combination, which is applied in the direction of AC network circuits, information technology support systems, electrical components, etc., and can solve problems such as difficult to achieve optimal allocation of global resources

Active Publication Date: 2019-06-18
NARI TECH CO LTD +5
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The traditional safety-constrained unit combination calculation mainly faces a single control area, and the inter-area AC-DC transmiss

Method used

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  • Calculation method and system for security constrained unit commitment of alternating current and direct current hybrid power grid
  • Calculation method and system for security constrained unit commitment of alternating current and direct current hybrid power grid
  • Calculation method and system for security constrained unit commitment of alternating current and direct current hybrid power grid

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Embodiment Construction

[0077] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0078] Such as figure 1 As shown, the calculation method of the safety-constrained unit combination of the AC-DC hybrid power grid includes the following steps:

[0079] Step 1. Determine the range of cross-regional DC transmission lines participating in optimal dispatching in the multi-regional AC-DC hybrid power grid, and establish the active power equivalent model of the DC transmission line; For the range of transmission lines, the equivalent model of active power of AC transmission lines is established.

[0080] The equivalent model of active power of DC transmission line is as follows:

[0081] The sending end of each DC transmission line is modeled as an equivalent load, and the receiv...

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Abstract

The invention discloses a calculation method for the security constrained unit commitment of an alternating current and direct current hybrid power grid. The method comprises the following steps that:establishing the active power equivalent models of an alternating current electric transmission line and a direct current electric transmission line, which participate in optimal scheduling, in a multi-area alternating current and direct current hybrid power grid; on the basis of the active power equivalent models, establishing a security constrained unit commitment optimal model which considerspartitioning load balance; solving the security constrained unit commitment optimal model; according to an optimization result, considering that all network monitoring elements are subjected to security correction; and if no new monitoring element power flow is out of limit, outputting an optimization result. Meanwhile, the invention discloses a corresponding system. By use of the method, power generation resources can be optimally regulated and controlled from a large range, a multi-area unit commitment scheme and the power plan of a cross-area alternating current and direct current electrictransmission line can be subjected to combined optimization, and large power grid ruling ability and electric power resource optimal configuration ability are improved.

Description

technical field [0001] The invention relates to a method and system for calculating the combination of safety-constrained units in an AC-DC hybrid power grid, in particular to a method and a system for calculating the combination of safety-constrained units for a multi-area AC-DC hybrid power grid, and belongs to the technical field of power system scheduling automation. Background technique [0002] Due to the centralized and large-scale development of renewable energy, coupled with the reverse distribution characteristics of energy bases and load centers, inter-provincial UHV AC and DC transmission has developed rapidly, and the AC-DC hybrid power grid characterized by large-scale cross-regional power transmission has been preliminarily formed. With the rapid expansion of the scale of multi-regional AC-DC hybrid power grids, the characteristics of grid integration are highlighted, and the technical demand for joint optimization of multi-regional power generation and transm...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCY04S10/50
Inventor 李利利涂孟夫杨军峰李旻丁恰昌力滕贤亮王亮
Owner NARI TECH CO LTD
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