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Starting control method and device of power transmission system, flexible inverter station and power transmission system

A technology of power transmission system and inverter station, applied in the field of power transmission, can solve the problems of poor start-up efficiency and commutation failure of DC system

Pending Publication Date: 2022-02-11
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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Problems solved by technology

[0004] However, in the process of raising the DC voltage to the rated voltage by the flexible DC inverter station, when unlocking the conventional DC inverter station, it is easy to cause DC power to flow from the flexible DC inverter station to the conventional DC inverter station, thereby causing conventional DC inverter The problem of commutation failure after the substation is unlocked leads to poor start-up efficiency of the DC system

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  • Starting control method and device of power transmission system, flexible inverter station and power transmission system
  • Starting control method and device of power transmission system, flexible inverter station and power transmission system
  • Starting control method and device of power transmission system, flexible inverter station and power transmission system

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[0038] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0039] The start-up control method of the power transmission system provided by this application can be applied to such as figure 1 shown in the application environment. Wherein, the power transmission system 10 includes a conventional rectification station 101 , a conventional inverter station 102 and a flexible inverter station 103 . The power transmission system 10 may be a DC power transmission system, may also be an AC power transmission system, and may also be an AC and DC hybrid power transmission system, etc., which are not limited herein. It should be noted, fi...

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Abstract

The invention relates to a starting control method and device of a power transmission system, a flexible inverter station, the power transmission system and a storage medium. The method comprises the steps that after the flexible inverter station is controlled to be unlocked, the output electrical parameter of the flexible inverter station is controlled to be a target parameter smaller than a rated electrical parameter; then, the conventional inverter station is controlled to be unlocked, the conventional inverter station is indicated to send an unlocking signal to the conventional rectifier station after being unlocked, the conventional inverter station normally executes phase commutation operating under the target parameters, and the unlocking signal is used for unlocking the conventional rectifier station; that is to say, the method can control the output electrical parameters of the flexible inverter station after the flexible inverter station is unlocked so as to avoid that the power of the flexible inverter station flows to the conventional inverter station too much after the conventional inverter station is unlocked due to the fact that the output electrical parameters of the flexible inverter station are too large. Therefore, by the adoption of the method, the starting efficiency of the power transmission system can be greatly improved.

Description

technical field [0001] The present application relates to the technical field of power transmission, in particular to a start-up control method and device for a power transmission system, a flexible inverter station, a power transmission system and a storage medium. Background technique [0002] Based on the many advantages of flexible DC transmission technology, more and more multi-terminal DC transmission systems adopt hybrid DC system transmission, including conventional DC systems and flexible DC systems; for example: a hybrid three-terminal DC system includes a rectifier station and two inverters. change station. Among them, the rectifier station is a conventional DC rectification station, and one of the two inverter stations is a conventional DC inverter station, using thyristors as the converter valve; the other inverter station is a flexible DC inverter station, using insulation Insulated Gate Bipolar Transistor (IGBT for short) is used as a converter valve; when th...

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Application Information

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IPC IPC(8): H02J3/36H02M1/36
CPCH02J3/36H02M1/36Y02E60/60
Inventor 冯雷吴健颖彭茂兰刘航梁正黄炟超廖芳群张沛然
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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