Reactive power distribution method of a thermal power plant adapting to bus operation modes

Abstract

The invention provides a reactive power distribution method of a thermal power plant adapting to bus operation modes. Under the condition of parallel operation of buses, all units connected under thetwo buses are taken as control objects, and the reactive power increment Q increment of the whole plant is distributed equally to each control object. Under the state of bus splitting operation, unitsconnected under the first bus are taken as first control objects, and units connected under the second bus are taken as second control objects; the first bus reactive power increment Q1 increment isevenly distributed to each first control object, and the second bus reactive power increment Q2 increment is evenly distributed to each second control object. The method automatically identifies the operation state of thermal power plant buses and adjusts the control mode of units according to the operation state of the thermal power plant buses so as to achieve the purpose that work of units adapts to the operation mode of buses in real time and ensure the safe, stable and economical operation of power grids.

Description

technical field [0001] The invention relates to the technical field of power plant management, in particular to a method for distributing reactive power in thermal power plants in an adaptive bus operation mode. Background technique [0002] With the input of high-power generator sets and the formation of ultra-high voltage power grid. The importance of voltage indicators has also become increasingly prominent. Effective reactive power and voltage control can not only improve the power quality of the grid, enhance the safety and stability of the power system operation, but also reduce the network loss and give full play to the economic benefits of the grid. Therefore, the voltage is not only an important indicator of the power quality of the power grid, but also an important factor to ensure the safe, stable and economical operation of the large power grid. The scale of modern power grid is getting bigger and bigger, and the power flow is complex. It is very difficult to a...

AI Technical Summary

Problems solved by technology

However, the existing mainstream automatic voltage control (AVC) system of thermal power plants is often only aimed at a certain operating mode of the power plant. When the operating mode of the power plant bus is changed, the AVC system cannot adapt to the operating mode of the bus, and does not judge the connection between the unit and the bus. relationship, but also in accordance with the original operating mode of control, which resulted in the wrong control of the unit

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