Reactive comprehensive control method based on improved five-zone diagram

Abstract

The invention relates to a reactive comprehensive control method based on an improved five-zone diagram. The method comprises the following steps: (1) the boundary of the improved five-zone diagram is defined based on a dynamic reactive compensation device, so that a variation range of the boundary of the improved five-zone diagram is obtained; (2) according to known five-zone diagram boundary conditions and the variation range of the boundary of the improved five-zone diagram, a schematic diagram of the improved five-zone diagram is obtained, and then a new regional part based on a continuous variation range of the dynamic reactive compensation device is obtained; (3) on the basis of the obtained improved five-zone diagram, the reactive comprehensive control method of the novel five-zone diagram is obtained. The reactive comprehensive control method effectively avoids the shortcoming that a control sequence is disordered sometimes, thereby being a safe and reliable control method for comprehensive reactive control over an intelligent substation and other kinds of equipment. Besides, the reactive comprehensive control method can cope with the characteristic that an electric power system reactively and frequently changes at present, as a result, the dynamic reactive compensation device is utilized more effectively, and a more accurate control effect is achieved.

Description

technical field [0001] The invention belongs to the field of safe and stable operation of power systems, and more specifically relates to a reactive power comprehensive control method based on an improved five-zone diagram. Background technique [0002] Voltage is one of the important indicators used to measure power quality. Good power quality is of great significance to the safe operation of power equipment, the economic benefits of enterprises, the daily life of the masses and the overall stability of the power grid. And the stability of the voltage is inseparable from the reactive power of the system, so we need to optimize the control of the reactive power. [0003] With the continuous development of reactive power optimization devices, in addition to traditional transformers and capacitors, new dynamic reactive power compensation devices including SVC and STATCOM have emerged. These devices have flexible adjustment ranges and higher The accuracy and new features diffe...

AI Technical Summary

Problems solved by technology

[0004] The most basic control method is the "nine-area diagram" control theory, but the traditional "nine-area diagram" control method has shortcomings such as frequent actions, switching oscillations, and long-term edge state of unqualified voltage and reactive power.

In order to achieve a better control effect, control methods such as improved "nine-area map" and fuzzy boundaries have emerged. Although these control methods have improved the control defects of the traditional "nine-area map" to a certain extent, there are still upper and lower boundaries. It is simply based on the fixed upper and lower limits of voltage and reactive power setting, and does not consider the shortcomings of the mutual influence between voltage and reactive power control.

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