Fault classification and zone identification in a power transmission system
US-2025149874-A1 · May 8, 2025 · US
Differential protection in electrical power networks
US9106076B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9106076-B2 |
| Application number | US-201313929112-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 27, 2013 |
| Priority date | Jun 29, 2012 |
| Publication date | Aug 11, 2015 |
| Grant date | Aug 11, 2015 |
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Abstract
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A method in a three-terminal differential protection includes measuring a terminal phase current ( I T1(y) , I T2(y) , I T3(y) ) at each terminal (T 1 , T 2 , T 3 ) of a protected zone of the differential protection in each phase (L 1 , L 2 , L 3 ) to be protected, and determining a bias current (I b(y) ) of the phase on the basis of the terminal phase currents ( I T1(y) , I T2(y) , I T3(y) ). The bias current determination includes subtracting phasor values of the terminal phase currents of two terminals from the phasor value of the terminal phase current of one terminal. The terminal phase current, which is a minuend in the phasor difference computation, is selected on the basis of the phase angles or amplitudes of the terminal phase currents.
First claim
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What is claimed is: 1. A method in a three-terminal differential protection in an electrical power network, the method comprising: measuring a terminal phase current at each terminal of a protected zone of the differential protection in each phase to be protected; determining a bias current of the phase on the basis of the terminal phase currents; determining whether a fault exists in the protected zone based on a threshold value computed as a function of the bias current; and…
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- What does patent US9106076B2 cover?
- A method in a three-terminal differential protection includes measuring a terminal phase current ( I T1(y) , I T2(y) , I T3(y) ) at each terminal (T 1 , T 2 , T 3 ) of a protected zone of the differential protection in each phase (L 1 , L 2 , L 3 ) to be protected, and determining a bias current (I b(y) ) of the phase on the basis of the terminal phase currents ( I T1(y) , I T2(y) …
- Who is the assignee on this patent?
- Abb Technology Ag
- What technology area does this patent fall under?
- Primary CPC classification H02H3/343. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 11 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).