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Inductive reactive compensation method for power grid for avoiding voltage off-normal risks

A technology of voltage over-limit and inductive reactive power, applied in reactive power compensation, AC network voltage adjustment and other directions, can solve the problem of not reducing power grid loss and so on

Inactive Publication Date: 2014-09-10
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

Since the inductive reactive power compensation equipment absorbs the excess reactive power of the power grid, and then reduces the original relatively high voltage level to the allowable range, the optimal configuration of inductive reactive power often cannot reduce the loss of the power grid, and needs to find a new optimization target

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  • Inductive reactive compensation method for power grid for avoiding voltage off-normal risks
  • Inductive reactive compensation method for power grid for avoiding voltage off-normal risks
  • Inductive reactive compensation method for power grid for avoiding voltage off-normal risks

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Embodiment Construction

[0090] The implementation of the present invention will be further described below in conjunction with the accompanying drawings, but the implementation of the present invention is not limited thereto.

[0091] Such as figure 1 As shown, the grid inductive reactive power compensation method to avoid the risk of voltage exceeding the limit includes the following steps:

[0092](1) Input power grid-related parameters such as generators, lines, transformers, reactive power compensation equipment, and loads, use power flow calculation tools (such as Matlab or BPA software, etc.) to perform power flow calculations in the initial state, and obtain the power and voltage of each node index;

[0093] (2) Analyze the adverse consequences caused to users and the power grid due to the grid power supply voltage exceeding the limit, and establish the equivalent curve function of the severity of the voltage exceeding the limit;

[0094] The probability distribution of the load loss changin...

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Abstract

The invention provides an inductive reactive compensation method for a power grid for avoiding voltage off-normal risks. The inductive reactive compensation method comprises the following steps of: analyzing consequences caused by voltage off-normal to build a severity curve function for the voltage off-normal; building risk indicators for the voltage off-normal and a risk earnings pattern for the inductive reactive compensation; building a practical computational method for the voltage off-normal risk indicators; building a mathematical model for calculating inductive reactive configuration of voltage off-normal risks, including a objective function and variable bound, adopting a cataclysmic genetic algorithm as an optimization algorithm; acquiring an optimal compensatory scheme for a large-scale electric system inductive reactive resources by optimization calculation, specifically including a reactive power compensation site and compensation capacity of each transformer substation in the power grid. The invention provides the inductive reactive compensation method for the power grid for avoiding voltage off-normal risks, so that the industry blank is filled; moreover, the inductive reactive compensation method is simple and easy to operate, easy to accept and grasp, and convenient to popularize.

Description

technical field [0001] The invention relates to a reactive power optimization model and method of a power system, in particular to an optimal compensation method suitable for inductive reactive power resources. Background technique [0002] Power system reactive power planning (Optimal Reactive Power Planning, ORPP) is based on the power grid planning for the next 5-10 years, and under the premise of ensuring that the safety constraints of various typical methods are met, the optimal reactive power compensation location, capacity and The best operating state of reactive power adjustment equipment, so as to achieve the purpose of improving voltage stability, improving voltage quality and reducing network loss. Usually, the research work of ORPP mainly focuses on two aspects, one is to improve and study the reactive power optimization model to make it reflect the actual situation as much as possible; the other is to study the optimization algorithm for model solving, including...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCY02E40/34Y02E40/30
Inventor 张勇军徐涛
Owner SOUTH CHINA UNIV OF TECH
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