A multi-terminal flexible direct current transmission system-level coordination control device

A direct current transmission system, multi-terminal flexible technology, applied in the direction of AC network voltage adjustment, electrical components, power transmission AC network, etc., can solve the problems of multi-terminal flexible direct current transmission system with multiple operation modes and complex control, and achieve flexible reactive power compensation function , solve the effect of line overload and reduce loss

Active Publication Date: 2016-11-30
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of multiple operation modes and complex control of the multi-terminal flexible direct current transmission system

Method used

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  • A multi-terminal flexible direct current transmission system-level coordination control device
  • A multi-terminal flexible direct current transmission system-level coordination control device
  • A multi-terminal flexible direct current transmission system-level coordination control device

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Embodiment Construction

[0024] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings. Such as figure 1 Shown is the functional module structure diagram of the multi-terminal flexible direct current transmission system-level coordination control device. Multi-terminal flexible straight system-level coordination control device data acquisition module, data processing module, control function processing module, communication management module and redundant control module data acquisition module completes the rapid acquisition of local I / O data and external interface device data, including communication occasions DC field switch switch status, AC system and DC system voltage, current and other sampling data, AC system channel status data connected to the stability control device and tie line power, etc. The data acquisition module sends the collected input data to the data processing module through the high-speed internal ...

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Abstract

The invention discloses a multi-end flexible direct current power transmission system level coordinate control device which comprises a data collecting module, a data processing module, a control function processing module, a communication management module and a redundancy control module. The data collecting module is responsible for process data collection and data collection of analog quantities such as state signals, voltage and current and generates input data needed by the control function processing module. The control function processing module comprises an active control module, a reactive control module, a direct-current voltage control module, a VF control module and the like, finally, reference value signals of voltage, active power, reactive power, frequency and the like of a converter station are generated, the reference value signals are sent to a converter station unit controller through the communication management module to complete a system control target. The multi-end flexible direct current power transmission system level coordinate control device can conduct emergent operation control which includes conversion of the system operation mode and the control mode, emergent running stopping and locking control under some faults, fault switching of a redundant system, resetting operation control after alarming or protecting actions and the like, and the reliability of integrated design of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of direct current transmission control, and specifically relates to a coordinated control device for a flexible direct current transmission system to realize the coordinated control of multiple converter stations in the flexible direct current transmission system, so as to ensure the normal transmission of direct current system power and various transient stability control targets Meet the design requirements. Background technique [0002] Voltage source HVDC transmission technology, also known as flexible DC transmission technology in China, is a DC transmission technology based on the voltage source converter of power electronic devices and pulse width modulation technology, which solves the problem of traditional HVDC transmission. Commutation failure and difficulty in forming a multi-terminal DC system have disadvantages. Flexible DC transmission has the characteristics of independently controlling acti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36H02J3/38H02J3/16H02J5/00
CPCY02E40/30Y02E60/60
Inventor 欧开健陈莉郭琦张绍勋郭海平张海棠林雪花张效宇
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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