Test method for power-receiving start-up with load of offshore wind power project

Abstract

The invention discloses a load test method for the power-driven start-up of an offshore wind power project. At present, how to do a load test during the power-driven start-up of an offshore booster station is a technical problem that is urgently needed to be solved by the technical personnel in the art. When a wind power generating set is in a safe stop state, a unit-side converter is locked, a grid-side converter acts as a reactive power compensator, the reactive power emitted or absorbed by the converters is adjusted according to test requirements. By controlling the power of each converterand the number of invested converters, the amplitude of output current can be flexibly controlled, the requirements of a power-driven start-up test of the offshore booster station are satisfied, and the complete set of calibration of primary equipment, a secondary circuit, a metering instrument and a relay protection and automation equipment can be realized. The power-driven start-up test of the offshore booster station is achieved before the grid-connection of the wind power generating set, the content of the power-driven start-up test of the offshore wind power project is improved, the risksof a later set grid-connected test are reduced, the debugging quality is improved, and the trial run time is shortened.

Description

technical field [0001] The invention relates to the field of offshore wind power generation, in particular to a load test method for an offshore wind power project based on a reactive power compensation operation mode of a converter. Background technique [0002] With the continuous development of new energy technologies, offshore wind power projects are gradually emerging. During the start-up stage of the offshore booster station, according to the requirements of the start-up test of electric power engineering, a complete set of verification of the primary equipment, secondary circuit, metering instruments, relay protection and automation devices is carried out through the load test. The amplitude has certain requirements. [0003] The start-up of the offshore step-up station marked the beginning of part of the trial operation. Both calculation and actual measurement prove that the test available power under the condition of maximum power load is far from meeting the requ...

AI Technical Summary

Problems solved by technology

If the number of installed wind turbines and the submarine cable construction do not meet the conditions for the wind turbine to operate under load, or the current wind force cannot meet the minimum power requirements required for the load test, the time for the load test of the offshore booster station must be postponed, thereby affecting the reliable operation of the station's power consumption , long-term investment in diesel generators is required for construction electricity, which increases the cost

[0006] 2. If the load test is not done before the wind turbine is connected to the grid, the main protection of the tie line protection, the busbar of the offshore booster station, the main transformer and the reactor protection will be out of operation, and the temporary protection single set will run for a long time. The primary equipment will be exposed to In the state of protection configuration and incomplete functions, there are serious hidden dangers during operation

[0007] 3. The integrity and correctness of the secondary circuit of the current transformer cannot be guaranteed

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