A Reactive Power Optimization Method for Power System
A power system and optimization method technology, applied in flexible AC transmission system, reactive power compensation, AC network voltage adjustment, etc., can solve problems such as impact, UPFC steady-state model cannot be applied, unreasonable system safe and stable operation, etc.
Active Publication Date: 2021-09-07
HOHAI UNIV
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[0003] However, in actual projects, in order to give full play to the regulation and control capabilities of UPFC, its topology and wiring methods are often more complicated. For example, in the UPFC project of Nanjing West Ring Network, the series-side transformer and parallel-side transformer of UPFC are connected to different buses, resulting in The traditional UPFC steady-state model cannot be applied
On the other hand, since the adjustment of line power by UPFC will cause power transfer, unreasonable control values may have an impact on the safe and stable operation of the system, resulting in low utilization of resources in UPFC projects
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[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0040] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein...
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The invention discloses a reactive power optimization method of a power system. Firstly, the voltage of a series voltage source and the reactance voltage drop of a series transformer are synthesized into a virtual voltage; Power injection, the three-point injection steady-state model of the unified power flow controller is obtained; secondly, the control variables in reactive power optimization are clarified, and the power balance equation of the system node is expressed in the form of line flow, and the branches and nodes where the unified power flow controller is located Then, determine the objective function and other constraints of the reactive power optimization problem, and process the discrete variables continuously to obtain a set of relaxation solutions; finally, re-solve the discrete variables to obtain a set of optimal solutions . The invention proposes a steady-state model of the unified power flow controller with stronger adaptability, uses the unified power flow controller in the field of reactive power optimization, and effectively improves the resource utilization rate of the unified power flow controller project.
Description
technical field [0001] The invention relates to a reactive power optimization method of a power system, in particular to a reactive power optimization method of a power system including a unified power flow controller, and belongs to the related technical field of power systems. Background technique [0002] The unified power flow controller (UPFC), as the most comprehensive flexible AC power transmission device, can realize fast and precise control of the power flow of the line without changing the existing grid structure of the system, thereby improving the regional power grid. Power supply capacity, has a wide range of application prospects. [0003] However, in actual projects, in order to give full play to the regulation and control capabilities of UPFC, its topology and wiring methods are often more complicated. For example, in the UPFC project of Nanjing West Ring Network, the series-side transformer and parallel-side transformer of UPFC are connected to different bus...
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IPC IPC(8): H02J3/16H02J3/06
CPCH02J3/06H02J3/16Y02E40/10Y02E40/30
Inventor 卫志龙朱梓荣孙国强臧海祥朱瑛
Owner HOHAI UNIV