GENERATOR PROTECTION definition

GENERATOR PROTECTION. Each generator has its own CPB (Control and Protection Board) in which all the control and protection devices are located. The main protection relay is GMR (Generator Management Relay). All the protections required by the BID are covered by this relay (Multilin SR489 or equivalent). The main protection is a differential current protection based on current transformers located at the stator neutral generator box from one side and on current transformers located at the 11 kV switchgear synchronizing breaker compartments. In addition a backup relay, fed from separate set of current transformers, is installed for some of the main protections usually installed for this size of generator. A principal diagram of the said protections is shown on drawing No. 0.002.690.0. Other protections such as windings temperature RTDs, Bearing temperature RTD's etc. are connected either to the GMR or directly to the PLC located at the CPB. STEP-UP TRANSFORMER The step-up transformer T1A (T2 in Transpower drawings) has its own TPP (Transformer Protection Panel) in which all the control and protection devices are located. The main protection relay is TMR (Transformer Management Relay). All the protections required by the BID are covered by this relay (Multilin SR745 or equivalent). As per the BID requirement, a backup relay shall be installed as well for the main protections. The main protection is a differential current protection based on current transformers located at the 220 kV circuit breaker bushings from one side and on current transformers located at the 11 kV switchgear main breaker CBX compartment. Other protections such as windings temperature, Oil temperature, Oil level, etc. are connected either to the TMR or directly to the PLC located at the CPB-CSC. The TRIPPING protection accessories mounted on the transformer are connected also directly to an 86T (Lockout relay) to ensure shut down even in case of faulty TMR. The step-up transformer is equipped with an OLTC (On Load Tap Changer) mounted on the 220 kV side to ensure always a stable 11 kV voltage on the main switchgear bus even in a case of fluctuations of the 220 kV Grid voltage system. The OLTC ensures the proper operation of the generators with full kW and kVAR capability also in case of instable Grid voltage. The OLTC ensure also that the low voltage 415VAC auxiliary loads shall be fed from a proper voltage derived from the stable 11kV system.
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Examples of GENERATOR PROTECTION in a sentence

  • EXHIBIT F.1 TYPICAL GENERATOR PROTECTION REQUIREMENTS Station A Station B R Transmission System R HV Line R R 3ph Isolating Load Device Load Load HV Line ** 3 VTs A21 B21 RT / TT *** F HVI B21 Directioned A21 Generating Station Generator A87 Transformer B87 * 3 VTs 27,59 81U,81O F G Synchronous Generator **** NOTES: * System security may dictate two transformer differential ACCEPTABILITY OF TRANSFORMER CONFIGURATION protections.

  • EXHIBIT F.1 TYPICAL GENERATOR PROTECTION REQUIREMENTS Station A Station B R Transmission System R HV Line R R 3ph Isolating Load Device Load Load HV Line ** 3 VTs ▇▇▇ ▇▇▇ ▇▇ / ▇▇ *** F HVI B21 Directioned A21 Generating Station Generator A87 Transformer B87 * 3 VTs 27,59 81U,81O F G Synchronous Generator **** NOTES: * System security may dictate two transformer differential ACCEPTABILITY OF TRANSFORMER CONFIGURATION protections.

  • Transmission System Code, Appendix 1 (version B) SCHEDULE F (CONT=D) EXHIBIT F.1 TYPICAL GENERATOR PROTECTION REQUIREMENTS Station A Station B R Transmission System R HV Line R R 3ph Isolating Load Device Load Load HV Line ** 3 VTs ▇▇▇ ▇▇▇ ▇▇ / ▇▇ *** F HVI B21 Directioned A21 Generating Station Generator A87 Transformer B87 * 3 VTs 27,59 81U,81O F G Synchronous Generator **** NOTES: * System security may dictate two transformer differential ACCEPTABILITY OF TRANSFORMER CONFIGURATION protections.

  • SCHEDULE F (CONT=D) EXHIBIT F.1 TYPICAL GENERATOR PROTECTION REQUIREMENTS Station A Station B R Transmission System R HV Line R R 3ph Isolating Load Device Load Load HV Line ** 3 VTs ▇▇▇ ▇▇▇ ▇▇ / ▇▇ *** F HVI B21 Directioned A21 Generating Station Generator A87 Transformer B87 * 3 VTs 27,59 81U,81O F G Synchronous Generator **** NOTES: * System security may dictate two transformer differential ACCEPTABILITY OF TRANSFORMER CONFIGURATION protections.