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Method and system for controlling active power of flexible direct current transmission system

A technology of active power and power transmission system, applied in the direction of power transmission AC network, etc., can solve the problems of poor reliability of flexible DC power transmission system, and achieve the effect of improving reliability

Active Publication Date: 2019-04-19
XJ ELECTRIC +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for active power control of a flexible direct current transmission system, which is used to solve the problem of poor reliability of the flexible direct current transmission system in the prior art due to too simple active power control

Method used

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  • Method and system for controlling active power of flexible direct current transmission system
  • Method and system for controlling active power of flexible direct current transmission system
  • Method and system for controlling active power of flexible direct current transmission system

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Embodiment 1

[0170] This embodiment provides a method for controlling active power of a flexible direct current transmission system, which is used for controlling active power of the flexible direct current transmission system.

[0171] This implementation provides an active power control method for a flexible direct current transmission system, which is applicable to flexible direct current transmission systems such as figure 1 As shown, it includes converter station A and converter station B. In this embodiment, both the converter station A and the converter station B are equipped with two pole control systems, and the two pole control systems in the converter station A are respectively the pole-to-pole control system of the converter station A and the pole-pole control system of the converter station A The pole-to-pole control system, the two pole-to-pole control systems in the converter station B are the pole-to-pole control system of the converter station B and the pole-to-pole contro...

Embodiment 2

[0225] This embodiment provides a method for controlling active power of a flexible direct current transmission system, which is used for controlling active power of the flexible direct current transmission system.

[0226] This implementation provides an active power control method for a flexible direct current transmission system, which is applicable to flexible direct current transmission systems such as Figure 4 As shown, it includes converter station A and converter station B. In this embodiment, both the converter station A and the converter station B are equipped with two units, the converter station A includes the pole control system of the unit 1 of the converter station A and the pole control system of the unit 2 of the converter station A, and the converter station B It includes the pole control system of unit 1 of converter station B and the pole control system of unit 2 of converter station B.

[0227] Each converter station is equipped with a corresponding safe...

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Abstract

The invention provides a method and a system for controlling active power of a flexible direct current transmission system. The control method comprises the steps of: when active power regulation signals are received, determining the working condition of a converter station according to a power reference value of a main pole control system / main unit and the received active power regulation value;and according to the received active power regulation value, the power upper limit and the power lower limit of each pole control system and the power reference value, calculating the active power regulation value of the main pole control system / main unit and a slave pole control system / slave unit of the converter station in each working condition. The technical scheme regulates the active power regulation value of the main pole control system / main unit and a slave pole control system / slave unit of the converter station in each working condition to allow the flexible direct current transmission system to regulate the active power component to meet the control demand for the control mode of the flexible direct current transmission system and the working condition so as to improve the reliability of the flexible direct current transmission system.

Description

technical field [0001] The invention belongs to the technical field of active power control of a flexible direct current transmission system, and in particular relates to a method and system for controlling active power of a flexible direct current transmission system. Background technique [0002] Since the 1980s, the pace of development of power transmission technology has been significantly accelerated, and methods to improve transmission capacity have emerged. There are high-tech technologies such as DC transmission technology, flexible AC transmission technology, and frequency division transmission technology, as well as existing high-voltage AC transmission technologies. The capacity-increasing transformation technology of transmission lines, such as step-up transformation, reconduction capacity-increasing transformation, AC transmission line to DC transmission technology, etc. Among them, the high-voltage direct current transmission technology has very important pract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36
CPCH02J3/36Y02E60/60
Inventor 宋延涛孔令凯许梦阳陈朋范雪峰王瑶吴东崛鲁庆华刘旭辉曹森戴国安
Owner XJ ELECTRIC
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