Reactive voltage control method considering dynamic reactive power reserves of partitions

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...

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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 The reactive power voltage control model of the power reserve capacity limit solves the problem that only by limiting the voltage within the qualified range will lead to the reduction of the system reactive power reserve and that the system voltage stability cannot be ensured only through the total reactive power reserve item in the objective function. The technical problem that each zone has a minimum reactive power reserve capacity to ensure its stability

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