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Method for operating monitoring device for cut-off/close of operating unit

A technology for electrical operation and monitoring equipment, used in electrical components, automatic disconnection emergency protection devices, circuits, etc.

Inactive Publication Date: 2005-12-14
ABB RES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the aforementioned solution does not face any type of control during the closing operation, which is performed using asynchronous commands

Method used

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  • Method for operating monitoring device for cut-off/close of operating unit
  • Method for operating monitoring device for cut-off/close of operating unit
  • Method for operating monitoring device for cut-off/close of operating unit

Examples

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Embodiment Construction

[0032] Referring to Figure 1, a preferred embodiment of the monitoring apparatus of the present invention is shown in diagrammatic form.

[0033] The monitoring device in the present invention (shown in dotted lines and in FIG. 1 ) comprises a processing unit 10 and measuring means 2 and 3, for example comprising current and voltage transformers. The measuring devices 2 and 3 measure the current and voltage of phase 5 .

[0034] The measuring devices 2 and 3 send measurement signals 7 and 8 representing the measured instant at which the current and / or voltage of phase 5 is assumed to be a desired value, eg a value like zero current value.

[0035] The processing unit 10 receives the input signals 7 and 8 and saves the series of measured instants. Using a first algorithm described below, the processing unit 10 always periodically calculates the period of a series of measured moments, assuming that the current and / or voltage are expected values.

[0036] The period of a series...

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PUM

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Abstract

Control and monitoring device for actuating means for the opening / closing of operating elements, featuring a mobile contact and a fixed contact, comprising measuring means for the current and voltage of one or more electrical phases and a processing unit equipped with means for performing the following functions: receiving in input from said measuring means signals indicating a succession of moments measured in which the voltage and / or current assumes a desired value; iteratively executing a calculation of the period of succession of moments measured; executing a predictive calculation of a succession of moments in which the current and / or voltage assumes said desired value; calculating, following an operating command, the time window for the opening / closing of said electric operating elements; sending a command to said actuator means on the basis of the time window determined and of the operating times of said electric operating elements; characterised by the fact that said processing unit: executes a first algorithm envisaging normal network operating conditions; executes a second algorithm envisaging non-normal operation of the network; <IMAGE>

Description

technical field [0001] The invention relates to a method of operating a monitoring device for opening / closing electrically operated devices such as circuit breakers, disconnect switches or similar devices in an electric power distribution and / or transmission network. In particular, the present invention relates to a method capable of predicting in time, from a known series of sampling times, the moment when the current or voltage of one or more electrical phases reaches a desired value. This makes it possible to perform the opening / closing operations of electrical operators at the optimum moment to minimize negative effects on the system due to transients or arcing phenomena. Background technique [0002] It is known from the state of the art that operating devices such as circuit breakers, disconnect switches or the like are usually operated automatically or manually in response to commands from a monitoring panel. This means operating in a "random" manner, ie often asynch...

Claims

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Application Information

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IPC IPC(8): H01H9/54H01H9/56H01H33/59H01H33/44H02H3/00H02H7/00H01H9/16
CPCH01H9/167H01H9/56H02H3/00
Inventor C·塞雷达R·波尔洛蒂
Owner ABB RES LTD
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