Power station voltage reactive power master-slave double-command control method

Abstract

The invention discloses a power station voltage reactive power master-slave double-command control method, comprising the following steps: 1) master station AVC (automatic voltage control) scans power grid running status data acquired by SCADA (supervisory control and data acquisition) in real time; 2) the master station AVC makes a running working condition decision and automatically selects power plants and buses participating in calculation and control; 3) area voltage is refreshed to control a quadratic programming model; 4) solving is carried out by a quadratic programming algorithm, themaster station AVC sends a double-command control strategy for the power plants through an SCADA telecontrol channel, a main command controls a target for high-voltage bus voltages of all sections, and an auxiliary command controls total upper / lower limit for the reactive power of a hanging unit; and 5) power plant sub-station AVC responds the control strategy sent by the master station through the double commands, and while a voltage command is tracked and a reactive power limit value restraining condition is met, reactive power coordination control in an execution link can be realized. In the method, the target / restraining of a master station AVC calculating link and a sub-station AVC execution link are realized to be consistent, so that the unit reactive power with rapid adjusting speed can be restrained in the practical running process, therefore, the reactive power coordination control in an execution link can be ensured.

Description

technical field [0001] The invention belongs to the field of electric power system control, and more precisely, the invention relates to a voltage reactive main and auxiliary dual-command control method for regulating and controlling a power plant by a main station. Background technique [0002] The automatic voltage control (AVC) system automatically monitors and controls the reactive power and voltage of the power grid. By adjusting the reactive power output of the generator, the transformer tap and the reactive power compensation equipment, the optimal distribution of the reactive power and voltage of the power grid is realized to meet the needs of safe, high-quality and economical operation. . [0003] The AVC system is realized based on the layered and partitioned control mode of "global voltage optimization and regional reactive power balance". On the basis of dynamic partitioning of the whole network, the closed-loop control of reactive equipment such as generators i...

AI Technical Summary

Problems solved by technology

However, in actual control, there are differences in the adjustment speed among power plants in the power grid. In the bus voltage setting mode, the power plant with the fastest adjustment speed rushes to generate reactive power, resulting in the problem that the voltage meets the requirements but the reactive power regulation is unbalanced.

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