Inter Turn Fault Protection of Stator Winding of Generator Protectio contra defectum inter gyrum spire statoris generatoris

Inter turn stator winding fault facile detegitur per protectionem differentialem statoris vel protectionem ad terram statoris. Itaque, non est valde necessarium praebere specialem schemam protectionis pro inter turn faultibus in statoris winding. Huiusmodi faulti generantur si insulatio inter conductores (cum diverso potentia) in eadem slot perforatur. Huiusmodi faultus celeriter mutat ad faultum ad terram.
Generator magnae voltae continet multos conductores per slot in statoris winding, itaque, in his casibus additio inter turn fault protection statoris winding fortasse esset necessaria. Praeterea in moderna usu, inter turn protection fit necessaria pro omnibus magnis generativis unitatibus.
Plures methodi possunt adoptari pro praebendo inter turn protection ad statoris winding generatoris. Methodus differentialis cross est communissima inter eas. In hoc schemate winding pro singula phase dividitur in duos vias paralelas.

Singula viae instruitur cum identicis current transformer. Secondaria huius current transformer sunt connecta in cross. Secondaria current transformer sunt connecta in cross quia currents in primario amborum CT ingrediuntur, contra casum differential protection of transformer ubi current ingreditur ab una parte et exire ad alteram partem transformer.
The differential relay cum serie stabilizante resistore sunt connecta trans CT secondary loop ut ostenditur in figura. Si quis inter turn fault occurrat in aliqua via statoris winding, erit unbalanced in CT secondary circuits ideo actuat 87 differential relay. Cross differential protection scheme debet applicari in singulis phasibus individualiter ut ostenditur.

Alternativa schemata de inter turn fault protection of stator winding of generator quoque usatur. Hoc schema praebet completam protectionem contra interna faulta omnium machinarum synchronous sive typus winding employatus aut genus methodi connectionis. Interna fault in statoris winding generat secundum harmonic current, includit in field winding et exciter circuitibus generatoris. Hoc current potest applicari ad sensitivum polarized relay per CT et filter circuit.

Operatio schematis controlatur per directionem negative phase sequence relay, ut operationem prohibeat durante externa unbalanced faulta aut asymmetrical load conditiones. Si sit aliqua asymmetria externa ad generator unit zone, negative phase sequence relay prohibet completam shutdown, solum permitte main circuit breaker tripptur, ut rotor damage prohibeatur propter over rating effects secundi harmonic currents.

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