Full power test method of power plant converter

Abstract

The invention discloses a full power test method for a power generation field converter. The method comprises the steps of disconnecting a generator-side circuit breaker and a grid-side circuit breaker so as to disconnect electrical connection between the converter and a generator and the electrical connection between the converter and a power grid; short-connecting a three-phase bus between the grid-side circuit breaker and a network-side filter; connecting a DC pre-charging device for a DC-side capacitor of the power generation field converter; and executing the following step (a) and / or (b): (a) disconnecting a generator-side fuse so as to disconnect electrical connection between a generator-side converter and the grid-side filter, and closing a grid-side AC fuse so as to perform grid-side full power testing on the power generation field converter; and (b) electrically connecting a generator side of the generator-side AC fuse to the grid-side filter, disconnecting the grid-side AC fuse so as to disconnect the electrical connection between a grid-side converter and the grid-side filter, and closing the generator-side AC fuse so as to perform generator-side full power testing on the power generation field converter.

Description

technical field [0001] The invention belongs to the technical field of converters, and in particular relates to a full-power testing method of a power plant converter. Background technique [0002] The working process of a typical power plant generator set is: after the generator converts natural energy into electrical energy, the converter converts the electrical energy output by the generator into an energy form that matches the voltage amplitude, frequency and phase of the grid, and Stable transmission to the grid, and finally achieve grid connection. In this process, the converter is one of the key components for the smooth grid-connected power generation of the generator set. The performance index of the converter will directly affect the power quality of the grid; even if the index of the converter does not meet the requirements, it will threaten the security of the power grid. [0003] For example, in wind power generation, direct-drive wind turbines are widely used...

AI Technical Summary

Problems solved by technology

[0008] When running tests in the field, follow the figure 1 Various difficulties will be encountered in the construction of the system structure of the laboratory circulating current test: (1) additional experimental sites are required; (2) the cost of isolation transformers, machine-side reactors, machine-side circuit breakers, etc. will be very high, and Excessive cable connections are more complicated and labor-intensive; (3) too much experimental equipment is not convenient for transportation and transformation; (4) after the experiment, all components and cables need to be dismantled for the next experiment, and the workload is heavy

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