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 du

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

The present invention provides a method for operating a monitoring device of a transmission for opening/closing an electric operating element, comprising: receiving a signal representing a series of future moments to be measured; repeatedly calculating the period of the series of future moments to be measured ; execute a budget for a series of future instants in which current and/or voltage are assumed to be said desired values; calculate time windows for opening/closing said electrical operating elements; send commands to said actuators; for normal network operating conditions, said The processing unit executes, on one or more electrical phases, a first algorithm that calculates said measured period and derives directly from said period a budget for a series of future moments for which the current and/or voltage is assumed to be said desired value; In normal operation, the processing unit performs budgeting for one or more electrical phases only if the period value provided by the first algorithm is below a given threshold for a series of future instants in which the current and/or voltage is assumed to be the desired value Second Algorithm.

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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