Regional power grid automatic voltage control (AVC) method

Abstract

The invention discloses a regional power grid automatic voltage control (AVC) method. An AVC system conducts classification and partitioning through PAS network modeling according to a distribution state of a power system voltage reactive space, the classification is conducted according to voltage levels of the power grid, and the partitioning is conducted according to a local area feature of reactive balance. An AVC system control mode gives priority to a sequence of first optimal control of area voltage, then correction control of voltage of all levels and finally the area reactive optimal control. The area voltage optimal control is optimizing of center point bus voltage level in a correction system. The correction control of the voltage of all levels is optimizing of node voltage level in an optimizing correction system. By arranging a classification partitioning control strategy on a traditional AVC and by adding a load predicting link and a link of diagnosing an electric control attribute of a device current state, the control strategy is predictable. Meanwhile, advanced control is achieved according to a device operating state, and device movement delay is reduced.

Description

technical field [0001] The invention relates to an optimal control method based on the traditional automatic voltage control system (AVC). Background technique [0002] Voltage quality, as one of the important indicators to measure the quality of power system operation, has an important impact on ensuring the safe use of electrical equipment and product quality. With the rapid development of power system automation and communication technology, the application of automatic voltage control (AVC) technology based on EMS / SCADA system is becoming more and more common. good technical means. [0003] Existing grid AVC often only considers the current time section of the power system, but does not consider historical experience and future trends. Therefore, frequent switching of equipment, low utilization of equipment, etc. are inevitable, and the number of equipment actions cannot be optimized. [0004] At present, the optimization method adopted by the AVC system has the idea o...

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Problems solved by technology

It is also proposed to introduce the inertia factor and acceleration factor respectively according to the continuous action interval time, voltage and reactive power over-limit time to form a diagnostic function to determine the state of the equipment (actionable or non-actionable). This method is effective It prevents frequent switching actions of transformer taps and capacitor / reactor groups, but this method produces a delay of at least ten minutes, which is not conducive to the real-time and effective reactive voltage control of AVC

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