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Reconfigurable static reactive compensation/DC deicing composite apparatus monitoring system

A technology of static reactive power compensation and monitoring system, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve the problem of no such device application, achieve consistency, simple device operation, and avoid misoperation Effect

Inactive Publication Date: 2009-03-18
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no application of such devices in China

Method used

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  • Reconfigurable static reactive compensation/DC deicing composite apparatus monitoring system
  • Reconfigurable static reactive compensation/DC deicing composite apparatus monitoring system
  • Reconfigurable static reactive compensation/DC deicing composite apparatus monitoring system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: The working mode of the composite device is restructured into the mode of the static var compensation device

[0023] as attached Figure 4 As shown, the specific realization method of reconfiguring the working mode of the compound device into a static var compensation device is given. The monitoring system closes the SVC knife switch and opens the ice-melting knife switch after receiving the SVC working mode switching command and the knife switch automatic operation command from the operator on duty. After the knife gate operation is completed, the primary equipment connection method is as follows: the wiring of the thyristor valve group forms an anti-parallel connection, three phase-controlled reactors are respectively connected in series behind each phase of the thyristor valve group, and the three-phase thyristor valve group is connected in a delta connection form. The low voltage side of the rectifier transformer. The entire reconfiguration process doe...

Embodiment 2

[0024] Example 2: The working mode of the compound device is reconfigured to the mode of the DC ice-melting device

[0025] as attached Figure 5 As shown, the specific implementation method of reconfiguring the working mode of the compound device into a DC ice melting device is given. The monitoring system opens the SVC knife switch and closes the ice-melting knife switch after receiving the ice-melting working mode switching command and the knife switch automatic operation command from the operator on duty. After the knife switch operation is completed, the primary equipment connection method is: the positive and negative poles of two sets of thyristor valve groups are connected end-to-end to form a series connection form, and three phase-controlled reactors are connected in parallel as smoothing reactors to the output side of the DC bus. The thyristor valve group has a large margin in the first design, and the reconfiguration method does not need to increase the capacity o...

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Abstract

The invention provides a monitoring system of a reconfigurable type SVC / DC-based deicing composite device. The system utilizes a layered distributed structure including a bottom layer, a middle layer and an upper layer, which comprises a superior automation system, a communication supervisor, a primary equipment microcomputer protection unit, a front end computer, a data collecting unit, a protecting logic unit, a monitor unit, an adjusting unit, an input and output unit, an operating executing unit, and water cooling system monitoring and valve base electronics. By communicating with the superior automation system to automatically perform switching operation of relative switches connected with the primary equipment, the monitor can realize reconfiguration of two operating modes including the SVC and the deicing, and exchanges information with a transformer substation integral automation system, thereby guaranteeing consistency of the operating mode and the working status of the primary equipment, meeting system requirements upon both normal condition and ice coating conditions in winter.

Description

technical field [0001] The invention belongs to the technical field of power electronics application, and mainly relates to a monitoring system of a reconfigurable static var compensation (SVC) / DC deicing compound device. Background technique [0002] At the beginning of 2008, severe rain, snow and freezing disasters occurred in Central China, Southwest my country, and East China. The power grid facilities were seriously covered with ice and snow, and frequent tripping of disconnected and towered lines caused huge losses to the power grid. In some areas, the power grid was even destroyed. hit. Due to the small time and frequency of ice disasters, if the DC ice melting equipment can only be used as an ice melting device, its economic efficiency is poor. The reconfigurable SVC / DC deicing composite device, in addition to meeting the needs of 220kV and above voltage level transmission lines for deicing, can also be used as a conventional dynamic reactive power compensation devic...

Claims

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Application Information

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IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 徐丽娟徐桂芝柴斌张皎荆平张帆
Owner STATE GRID CORP OF CHINA
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