AGC control method for direct-power-supply independent power grid system

Abstract

The invention discloses an AGC control method for a direct-power-supply independent power grid system. The AGC control method is characterized in that: adjustable frequency of a direct-power-supply independent power grid is controlled in a subsection, layering and grading manner, and the division of control frequency is carried out on execution equipment at a power side and a load side in the power grid; specifically, frequency of the power grid system is adjusted depending on three points including the power side-power grid-load side through carrying out primary frequency modulation on the power side, carrying out AGC secondary frequency modulation on a power dispatching center and setting a frequency control system at the load side. The AGC control method has good effect of regulating and controlling the direct-power-supply independent power grid system, and achieves no-deviating regulation.

Description

technical field [0001] The invention relates to an AGC control method of a power system, in particular to an AGC control method of an independent power grid system in which a power supply directly supplies charges. Background technique [0002] A 2×450,000-ton electrolytic aluminum production line has been built in an industrial park, and 6×350MW thermal power generating units have been built as supporting facilities, and the direct power supply grid mode of large units to large tanks has been adopted. The direct power supply independent grid system has fewer automatic power generation control units in the early stage of construction, and the frequency adjustment capability of the units is limited, which makes the direct power supply independent grid relatively fragile. When the operating equipment on the power supply side or the load side fails, improper handling of the accident may cause the grid to collapse. [0003] The AGC of the power dispatching center adopts the cons...

AI Technical Summary

Problems solved by technology

However, in the independent grid structure with large power directly supplying large loads, the conventional AGC control mode is likely to cause interlaced oscillations between the frequency modulation unit on the power supply side and the AGC control force; it is easy to cause the force and reverse action to fail to meet the stability of the power grid in the event of an accident. frequency control; it cannot reduce the frequent action of the operating generator set, and even cause the frequency of the power grid to fluctuate up and down, posing a threat to the safe operation of the power grid

[0004] At present, there is no precedent for AGC control technology to be used in the independent grid system of large power supply to large load direct power supply and to exert its effectiveness.

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