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Intelligent transformer substation voltage switching and paralleling method and device

A technology of voltage switching and voltage, which is applied in the direction of circuit devices, electrical components, information technology support systems, etc., can solve the problems of high device cost, complex data processing, and limitation of working transformer output data communication protocols, etc., to achieve simple and reliable implementation sex high effect

Inactive Publication Date: 2010-08-11
XJ ELECTRIC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a smart substation voltage switching method and a parallel method to solve the problems of complex data processing and high device cost in the existing methods, and the work of the device is limited by the data communication protocol output by the transformer
[0007] Another object of the present invention is to provide a smart substation voltage switching device and a parallel device to solve the problem that the cost of the existing device is high, and the work of the device is limited by the data communication protocol output by the transformer

Method used

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  • Intelligent transformer substation voltage switching and paralleling method and device
  • Intelligent transformer substation voltage switching and paralleling method and device
  • Intelligent transformer substation voltage switching and paralleling method and device

Examples

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Effect test

Embodiment 1

[0034] The steps of the voltage switching method of the double busbar power supply of the present invention are as follows:

[0035] Collect the voltage output of two sets of electronic voltage transformers on the double bus;

[0036] Use the position signals of the two isolated knife switches on the double bus as binary inputs, and collect the status signals of the two binary inputs;

[0037] Control and output the voltage of the corresponding busbar according to the collected voltage output of the two sets of electronic voltage transformers and the corresponding status signal of the input of the isolation switch;

[0038] As shown in the following table 1, when the I bus isolation switch is collected and the II bus isolation switch is withdrawn, the I bus voltage is output; when the II bus isolation switch is collected and the I bus isolation switch is withdrawn, the output II is Bus voltage; when it is collected that both I bus and II bus isolation switches...

Embodiment 2

[0041] The voltage switching device for power supply of dual busbars of the present invention is as figure 1 As shown, the device includes:

[0042] The logic controller CPLD (programmable device FPGA can also be used) is used to control the output of the switched voltage according to the collected position signals of the I mother and II mother isolation switch and the corresponding voltage output of the voltage transformer;

[0043] The two voltage input ports A and B are used to connect the voltage output of voltage transformers I and II, and are respectively connected to the input port of the logic controller CPLD through the photoelectric control circuit O / E;

[0044] Two isolated knife switch position input ports PT1 and PT2 are used for the input of the I female and II female isolated knife switch position signals, and are respectively connected to the input ports of the logic controller CPLD through optocoupler devices;

[0045] The switching voltage o...

Embodiment 3

[0047] The steps of the single bus section or double bus voltage parallel method of the present invention are as follows:

[0048] Collect the voltage output of two sets of electronic voltage transformers on the two buses;

[0049] Use the position signals of the two isolated knife switches on the two buses as binary inputs, and collect the state signals of the two binary inputs;

[0050] Use the position signal of the isolation switch of the section switch or the bus tie switch as the binary input, and collect the status signal of the binary input;

[0051] According to the collected voltage output of the two sets of electronic voltage transformers, the status signal of the binary input of the two isolation switches and the status signal of the binary input of the isolation switch of the parallel switch, the voltage of each segment after parallel output is controlled;

[0052] As shown in Table 2 below, when it is collected that the parallel switch isolation swit...

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Abstract

The invention relates to an intelligent transformer substation voltage switching and paralleling method and device. The voltage switching method of the double-bus power supply of the invention collects the voltage output quantity of two sets of electronic voltage transformers on the double bus, collects the input state signals of two isolation switches and controls and outputs the voltage of the corresponding bus according to the two sets of voltage output quantity and the corresponding isolation switch input state signals. When the input of a 1 primary isolation switch and the withdrawal of a 11 primary isolation switch withdraws, 1 primary voltage is output. When the input or the non-input state of the 1 primary isolation switch and the 11 primary isolation switch is collected, 11 primary voltage is output. The electronic voltage transformer output data of the invention has nothing to do with communication protocol. The invention does not have to decode the frame of the input signals, can output the digital quantity signals of a corresponding primary electric transformer directly, realizes the transparent transmission of the signals and has the advantages of simple realization and high reliability.

Description

technical field [0001] The invention belongs to the field of electromechanical protection of power systems, and relates to voltage switching and paralleling of digital interface output signals of electronic voltage transformers in intelligent substations, in particular to methods and devices for voltage switching and paralleling of intelligent substations. Background technique [0002] When carrying out the bus bar operation of primary electrical components, voltage switching or parallel devices are used to ensure that the secondary voltage required by the relay protection of primary electrical components, measuring instruments and automatic devices corresponds to the bus bar to which the primary components are connected. [0003] In conventional substations, the method of voltage switching requires a DC operating power supply, and the voltage switching function is completed through the operation of the relay. The disadvantages of this method are: the failure of voltage swit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00
CPCY02E60/723Y04S10/16Y02E60/00
Inventor 张克元周水斌田志国周丽娟尹明
Owner XJ ELECTRIC
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