Distance Relay Protection based in "Travelling Waves" not Impedance.
Distance Relay Protection based in "Travelling Waves" not Impedance.
(OP)
Hi everyone.
I am investigating to use a system based in Protection for transmission line or or other aplication (Ex. ANSI 21: Distance Protection) based in "Travelling Waves" instead of the usual calculation impedance.
1.- They know some relay, model, manufacturer of such equipment?
2.- What may be the advantages or disadvantages of this method?
3.- They know that cases are recommended to use such technology and which is not recommended, that the decision depends on factors?
4.- someone has some typical diagram of implementation?
thanks in advance for the information.
Juan Gómez
I am investigating to use a system based in Protection for transmission line or or other aplication (Ex. ANSI 21: Distance Protection) based in "Travelling Waves" instead of the usual calculation impedance.
1.- They know some relay, model, manufacturer of such equipment?
2.- What may be the advantages or disadvantages of this method?
3.- They know that cases are recommended to use such technology and which is not recommended, that the decision depends on factors?
4.- someone has some typical diagram of implementation?
thanks in advance for the information.
Juan Gómez






RE: Distance Relay Protection based in "Travelling Waves" not Impedance.
Rgds
Guna
RE: Distance Relay Protection based in "Travelling Waves" not Impedance.
You can find basic information about the operation at the following links:
- CIRED EVALUATION OF TRAVELLING WAVE BASED PROTECTION SCHEMES
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- Relay Protection of EHV Shunt Reactors Based on. the Traveling Wave
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- HIGH SPEED DIGITAL PROTECTION. OF EHV TRANSMISSION LINES. USING TRAVELING WAVES.
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- Protección de sistemas eléctricos mediante reconocimiento de patrones de onda viajera
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I know little of the subject but I understand that it is much faster in detecting that the traditional method due to use higher frequencies injected into the network and detect the bug in cycles faster by getting a wave of increased frequency of 50/60Hz.
In some cases one negative aspect is that for distances close to the relay point (starting point of the traveling wave), is not as accurate a few miles <7-10km, for distances> 7-10K is a good way (maybe this aspect was fixed in the new schemes).
Thanks.