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Protecting, measuring and controlling integrated device with unbalanced current protection function for capacitor

A capacitor protection and current balancing technology, which is applied in emergency protection circuit devices, measuring devices, measuring current/voltage, etc., can solve the problems of no unbalanced current protection function, and the operation safety of capacitor banks cannot be effectively guaranteed, etc., to achieve reliable High reliability, convenient information transmission, and the effect of improving safety performance

Active Publication Date: 2013-02-20
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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  • Abstract
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  • Claims
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Problems solved by technology

However, most of the current capacitor protection, measurement and control integrated devices do not have the unbalanced current protection function, resulting in the operation safety of the capacitor bank in the power system cannot be effectively guaranteed

Method used

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  • Protecting, measuring and controlling integrated device with unbalanced current protection function for capacitor

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Embodiment

[0013] An integrated capacitor protection, measurement and control device with an unbalanced current protection function. The capacitor protection, measurement and control integration device is used to protect, measure and control parallel capacitors in an indirect grounding system or a small resistance grounding system. The capacitor protection, measurement and control The integrated device is also provided with an unbalanced current protection module, which includes a trip protection unit and an alarm unit.

[0014] The trip protection unit is used to trip and disconnect the system circuit when the unbalanced current value exceeds the trip current threshold and lasts for a certain period of time. Among them, the tripping current threshold can be freely set between 0.02 and 12A, and the unbalanced current value exceeds the tripping current threshold for a duration of t 1 The range is 0s1 ≤100s, within this range, a time fixed value can be set to control tripping.

[0015] Th...

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Abstract

The invention relates to a protecting, measuring and controlling integrated device with an unbalanced current protection function for a capacitor. The integrated device is used for protecting, measuring and controlling a parallel capacitor of an indirect grounding system or a small-resistance grounding system. The integrated device is further provided with an unbalanced current protection module, wherein the module comprises a tripping operation protection unit and an alarm unit, the tripping operation protection unit is used for carrying out a tripping operation to switch off a system circuit when an unbalanced current value exceeds a tripping operation current threshold value for a certain time, and the alarm unit is used for alarming before the tripping operation protection unit runs and when the unbalanced current value exceeds an alarm current threshold value for a certain time. Compared with the prior art, the integrated device has the advantages of good safety, high reliability, convenience in communicate and the like.

Description

technical field [0001] The invention relates to a power system protection device, in particular to a capacitor protection, measurement and control integrated device with an unbalanced current protection function. Background technique [0002] Capacitor protection, measurement and control integrated device is generally used for relay protection of capacitors. According to different models, it can be applied to the protection and measurement of shunt capacitors installed in indirect grounding systems with voltage levels below 110kV or small resistance grounding systems. It is suitable for single Y, double Y, △-shaped wiring capacitor bank, can be installed in a panel or on-site in a switch cabinet. However, most of the current integrated capacitor protection, measurement and control devices do not have the unbalanced current protection function, so the operation safety of the capacitor bank in the power system cannot be effectively guaranteed. Contents of the invention [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/16G01R19/165
Inventor 周行星鲍伟黄华高凯吴建坤
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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