Reactive power compensation access point screening method based on out-of-service synchronous generator set

Abstract

The invention discloses a reactive power compensation access point screening method based on an out-of-service synchronous generator set, and aims to screen proper reactive power compensation access points on the premise that a reactive power source site is fixed and realize reactive power compensation of the out-of-service synchronous generator set to a system. The method comprises the steps of: calculating the electrical distance between the nodes based on the system node impedance; on the basis of the electrical distance, constructing a node feature matrix; performing hierarchical clustering analysis on the node feature matrix to realize effective partition of the nodes, wherein the node partition can reduce the reactive compensation access point screening range when the retired synchronous unit is used as a phase modifier to operate; according to the geographic position of the decommissioned synchronous generator set, determining a load node partition where an operation plant site is located as a to-be-compensated partition of the decommissioned synchronous generator set; calculating an importance index value of a node in the compensation partition, and screening a proper reactive compensation access point according to the importance index value; and quickly determining the reactive compensation access point based on the decommissioned synchronous generator set, fully exerting the reactive compensation capability of the decommissioned synchronous generator set, and therefore, safe and stable operation of the system is guaranteed.

Description

technical field [0001] The invention relates to a method for screening reactive power compensation access points, in particular to a method for screening reactive power compensation access points based on decommissioned synchronous generating sets. Background technique [0002] The structure of my country's electrical industry is dominated by thermal power. Power companies are major energy consumers, and some small thermal power units are the main sources of emissions of sulfur dioxide, nitrogen oxides and other pollutants. Therefore, electric power enterprises have become the key areas of energy saving and pollution reduction. With the adjustment of the energy structure and the large-scale development of renewable energy, the living space of coal-fired power units is further compressed, the task of supply-side reform is arduous, and a large number of thermal power units are facing retirement. If it is directly scrapped and replaced, a large amount of assets will be wasted ...

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Problems solved by technology

If it is directly scrapped and replaced, it will cause a lot of waste of assets and the cost will be too high

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