A kind of AVC control method

Abstract

The invention provides an AVC control method. Through an isolation switch, the same substation is connected to a plant line 1 and a plant line 2 of a power grid, thus the plant line 1 and the plant line 2 are virtualized to a closing loop double-bus, when a main station sends voltage control commands to a first generator group G1 and a second generator group G2 through the plant line 1 and the plant line 2 respectively, an AVC substation selects one of the voltage control commands as a voltage execution command, and the reactive increment corresponding to the voltage execution command, a generator group power factor, reactive margin and the like are distributed to the first generator group G1 and the second generator group G2 to carry out execution. In this way, the reactive power generation of the plant line 1 and the plant line 2 is in the same direction, the shock or reactive circulation of the voltage U1 of the plant line 1 and the voltage U2 of the plant line 2 are prevented, thus the voltage U3 of the power grid is quickly stabilized, and the scheduling of a next round of scheduling command is facilitated.

Description

technical field [0001] The invention relates to the technical field of grid voltage, in particular to an AVC control method. Background technique [0002] Since 2000, power grids in several regions, provinces and cities across the country have carried out the research and development of AVC (Automatic Voltage Control System), which has achieved significant improvement in the quality of power supply voltage, energy saving and loss reduction, and greatly reduced the operating personnel. Delightful effect of labor intensity. [0003] Some urban power grids are typical receiving-end large power grids, and the landing point requires a large amount of reactive power support, and the problem of reactive power and voltage is prominent. In the power grid, the reactive power resources are unevenly distributed, the reactive power flows between different voltage levels, and the loss is large, and the reactive power layered and partitioned balance cannot be fully realized. It is difficu...

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Problems solved by technology

Unbalanced reactive power will also cause the AVC substation to frequently send magnetization increase and demagnetization adjustment commands to the excitation system, which will affect the working life of the contacts and bring some inconvenience to the operator's monitoring

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