Reactive voltage control method considering dynamic reactive power reserves of partitions

A voltage control method and a voltage control model technology, applied in reactive power compensation, AC network voltage adjustment, etc., can solve the problems of system reactive power reserve reduction, inability to ensure power grid partitions, etc.

Inactive Publication Date: 2015-06-10
HOHAI UNIV
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to aim at the deficiency of the above-mentioned background technology, provide a reactive power voltage control method that takes into account the dynamic reactive power reserves of the partitions, establish the objective function including the total dynamic reactive power reserve of the system, and the constraint conditions include the minimum reactive power reserve of each partition...

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  • Reactive voltage control method considering dynamic reactive power reserves of partitions
  • Reactive voltage control method considering dynamic reactive power reserves of partitions
  • Reactive voltage control method considering dynamic reactive power reserves of partitions

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Embodiment Construction

[0040] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.

[0041] A reactive power and voltage control model and method involving dynamic reactive power reserves in the zones involved in the present invention, its algorithm flow is as follows figure 1 As shown, it includes the following 4 steps.

[0042] Step 1. Determine the reactive power and voltage control partitions of the power grid, and identify the key nodes of each partition:

[0043] Step 101, calculate the electrical distance d between the reactive source node and the controlled node ji :

[0044] d ji = - 1 g | Δ V j Δ V i | = - 1 g | ...

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Abstract

The invention discloses a reactive voltage control method considering dynamic reactive power reserves of partitions and belongs to the technical field of power system optimized operation. The method comprises the steps of determining the reactive voltage control partitions of the power grid and identifying the key node of each partition, calculating the VQ curve of the key nodes and the dynamic reactive power reserves of the partitions, calculating the minimum reactive power reserve limiting value needed by each partition under the most serious failure, establishing a reactive voltage control model with the total dynamic reactive power reserve of the system as an optimization goal and the minimum reactive power reserve limiting value needed by each partition under the most serious failure as a constraint condition, and solving the reactive voltage control model. According to the reactive voltage control method, the reactive voltage control model contains the system total dynamic reactive power reserve optimized item and the minimum reactive power reserve limiting value constraint of each partition is established to balance the distribution of the dynamic reactive power reserve of each partition, and therefore, the voltage collapse phenomenon is avoided, and meanwhile, the purposes of reducing the active grid loss of the system, improving the voltage quality and enhancing the system voltage stability are achieved.

Description

technical field [0001] The invention discloses a reactive power voltage control method taking into account the dynamic reactive power reserves of the partitions, and belongs to the technical field of power system optimization operation. Background technique [0002] The automatic control of reactive power and voltage in power system can effectively improve the voltage quality and reduce the active power loss of the system, which is of great significance to the economical and safe operation of the power system. However, in the traditional optimization model, only limiting the node voltage within the qualified range may lead to the reduction of the reactive power reserve of the system, resulting in a decrease in voltage stability. With the development of the electricity market and the aggravation of the load, the problem of voltage stability has become increasingly prominent. In recent years, the research on reactive power and voltage control of power systems considering volta...

Claims

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Application Information

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IPC IPC(8): H02J3/16
CPCY02E40/30
Inventor 赵晋泉居俐洁
Owner HOHAI UNIV
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