Testing method of low-voltage ride through capability of fossil power plant auxiliary engine

Abstract

The invention discloses a testing method of the low-voltage ride through capability of a fossil power plant auxiliary engine. The method is used for testing the low-voltage ride through capability of the fossil power plant auxiliary engine based on the excitation control of an excitation regulator. By reasonably arranging the operation mode of the plant, the method can be used for detecting whether the auxiliary engine can stay for more than 9 seconds through the 70% phase-step test of a generator excitation regulator so as to verify whether the auxiliary engine has the low-voltage ride through capability. The method provided by the invention can be used for rapidly detecting the low-voltage ride through capability of the fossil power plant auxiliary engine and deciding a corresponding improvement scheme according to the detecting result and has important significance for guaranteeing the safe and stable operation of the plant and a power grid.

Description

technical field [0001] The invention belongs to the field of measurement technology, and in particular relates to an excitation control-based test method for the low-voltage ride-through capability of thermal power unit auxiliary machines, which is used for testing the low-voltage ride-through capacity of thermal power unit auxiliary machines. Background technique [0002] Low-voltage ride-through capability originally refers to the ability of a small power generation system to maintain grid-connection when the voltage drops at the grid-connection point, and even provide a certain amount of reactive power to the grid to support the recovery of the grid until the grid returns to normal, thereby "riding" the ability of this low-voltage time. In recent years, there have been many lightning strikes, short-circuiting of electrical equipment, and grounding faults in thermal power plants, which have caused short-term voltage drops in power grids and power plants, resulting in low po...

AI Technical Summary

Problems solved by technology

In recent years, there have been many lightning strikes, short-circuiting of electrical equipment, and grounding faults in thermal power plants, which have caused short-term voltage drops in power grids and power plants, resulting in low power and control power supplies for water pumps, pulverizers, blowers, and coal mills. voltage, some auxiliary machines have low-voltage blocking protection actions, causing the auxiliary machines to stop working, resulting in furnace shutdown and shutdown accidents

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