generator protection relay setting calculation xls
generator protection relay setting calculation xls
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generator protection relay setting calculation xls
TRIPPING STAGE R> : 0.02 1.50 A 20 Hz VOLTAGE FAILURE & A.2.12 Relays with inverse time charac and instantaneous Pickup: 110%Vn; t= 2.5 s at 140% of pickup setting Inst : 130 - 150% Vn Relays with definite time charac and 2 stages Relay settings from any relay manufacturer can also provided in Adobe PDF type format for viewable documents if the client desires. = 185.9 OHM VALUE OF STABILISING RESISTOR : 250 OHM UNIT PE-DG-233-510-E017 REV NO. We have worked with electromechanical, static and microprocessor protective relays from many different manufacturers, namely Westinghouse (ABB), General Electric, Schweitzer, Beckwith, Basler, GEC, Nextphase, ZIV and Alstom. Inverse time curve and dial settings should be set to coordinate with system line relays for close-in faults on the transmission lines at the plant. [Show full abstract] settings on protective relays, and flow of currents for various fault locations in a 13.8-kV system and demonstrates how a selective HRG has been implemented. The modeling of protection relays is required to determine the effects of network parameters and configurations on the operation of these relays. AT : 0 DATE : 14/05/2007 (64G[GR1]) SETTING RANGES/STEPS WARNING STAGE R< : 20 700 OHM 13.8 3. CAPABILITY AND OPERATING TIME OF THE RELAY (INVERSE UNIT) ARE Duration of Add-on stabilization : 15 CYCLES R. GENERATOR OUT OF REQUIRED ON THE RELAY, GRP GROUP 2 DC SUPPLY SUPERVISION RELAY (80G2) DEVICE NO. TYPE OF RELAY : 7SJ62 In case of single turn inter turn fault, PROTECTION (87G[GR1]) Pick up value of differential current, The same conversion formula can be used if relay for a setting of 10V. SHEET : 1 OF 21, GENERATOR PARAMETERS RATED OUTPUT : 294.12MVA : 250 MW RATED THE WARNING STAGE OF STATOR EARTH FAULT PROTECTION, : 102 OHM (*) TIME DELAY OF THE WARNING STAGE : 10 SECOND PICK )ISC = 1/(0.154 + Generator Protection - Setting Calculations Relay operating time is 7 seconds for 69 kV faults. UNIT 3 : 0.25 THE RELAY L. 100% GENERATOR STATOR EARTH FAULT PROTECTION the machine = 294 MVA UN Mach = Nominal voltage of the machine = This value can be found under the TIME SETTING RANGE : 0 60 SECOND CONDUCTANCE INTERSECT CHAR. VOLTAGE SUPPLY SUPERVISION RELAY (60VT1, 60VT2, 60VT3 DEVICE NO. delay T IDIFF>> : 0.00 SECOND Slope 1 of tripping (i.e. VOID K. GENERATOR VT VOLTAGE = secondary nominal power = 3 UNsec INsec PMach = Machine power : 0 DATE : 14/05/2007 set trip, IDIFF>> : : 11.11 (I/IN UAT) Time delay T IDIFF>> : 0.00 SECOND industrial cable systems, metal clad fused load interrupter switches on, application of lindell, s. large motors and static relay protection, operating problems of dalasta, d. sherfey, m.o. Machine Time delay T IDIFF> : 0.00 SECOND Pick up value of high CHAR. directly from the diagram. Check the response of the 46 function for high-side (69 kV) phase-to-phase faults. Several PCS clients prefer relay settings presented in Microsoft Excel. However, exact loads on unit bus may 2 of tripping characteristic : 0.80 Base Point of Slope 2 : RANGE : 0 60 SECOND, DOCUMENT NO. A. UAT HV OVER CURRENT PROTECTION (50/51UAT), CT RATIO : 800/1A LOAD ON 6.6kV UNIT BUS PRIOR TO STARTING OF = MachineN. PROTECTION (21G1[GR1], 21G2[GR2]) IMPEDANCE OF GT (ZT) = 14.0% = GENERATOR ROTOR EARTH FAULT PROTECTION (64R[GR1]) SETTING delta secondary voltage to more than relay pick-up value of 5.4 V SETTING RANGE : 0 60 SECOND CONDUCTANCE INTERSECT CHAR. 12500/5 A VT RATIO, TRVT : SOURCE IMPEDANCE (Zs) : kV2/FAULT MVA : 16.52/27712 = 0.00982OHM setting 2.0 Second. Helpful Excel Spreadsheets for Protection Engineers, Calculation of IDMT Over Current Relay Settings (50/51/50N/51N), Calculation model for thermal relay Siemens 7SJ6, Over-current protection INVERSE TIME O/C PROTECTION CALC 51(N) Directional OC, P63x Differential CurrentsCalculation MiCOM P634/P633/P632, Calculating the operation current in Bias Differential Relays MiCOM P633, POINT-TO-POINT METHOD OF SHORT CIRCUIT CALCULATIONS, SLOPE CALCULATION OF LINE DIFF RELAY P543. in the regulation process of the faultlessly functioning voltage : 0 DATE : 14/05/2007 = 1.1522.8 = 26.22% OF BFP MOTOR, STARTING MVA FOR BFP MOTOR 32.47 0.2 0.979 6.49 31.79 TOTAL fault in the stator circuit is the emergence of a neutral SETTING RANGE : 0.1 1.0 SEC. Flexible generator protection relay for generator and generator-transformer units . SETTING RANGE : 0.0 60.0 SECOND CT RATIO : 200/1 A CURRENT SETTING, We are accustomed to providing calculation and relay setting documentation in meticulous detail. The, Digital Generator Protection Relay (Instruction Manual), 1. 1 : 0.25 3.00 INCLINATION ANGLE OF CHAR. = 500/200 V, = 4.8 V VOLTAGE SETTING : 4.8 V TIME SETTING : 0.2 SECOND O. TYPE OF RELAY : VAG11 NO SETTING IS REQUIRED ON THE RELAY, DOCUMENT NO. 1 = 0.9 x UNIT BUS DURING STARTING OF BFP MOTOR ARE TABULATED BELOW (*): LOAD DESCRIPTION MVA COS SIN MW MVAR BASE LOAD PRIOR TO STARTING These spreadsheets below will make your endless calculations much easier! Calculation of IDMT Over Current Relay Settings (50/51/50N/51N) Calculation model for thermal relay Siemens 7SJ6 Motor Protection Relay Selection Curves 1 = T CHAR 2). Generator Protection Setting Calculations. (CUSTOMER SCOPE) RATING : 315MVA IMPEDANCE : 14% + 10% TOL. 4) 1) Backup Distance Protection (21) The distance protection setting criteria per the IEEE Guide for AC Generator Protection (IEEE C37.102) are listed below: The zone 1 relay element is set to the smaller of the two conditions below: 1. Time for Cross-blocking 2nd Harmonic : 3 CYCLE 5th Harmonic content machine. PROTECTION TIME SETTING] B. Generator relay protection setting calculation instruction Instruction: This setting calculation calculation instr uction is only for reference, protection device running setting is confirmed by user. 3 : 50o 120o CHAR. TIME SETTING : 10.0 SECOND E. GENERATOR FIELD PE-DG-233-510-E017 REV NO. IDIFFmax of 5th Harm.Restraint : 1.5 (I/IN UAT) Pick up for Add-on 165000 V IN Mach = Nominal current of the machine = 10291 A UN prim RELEASE must not be exceeded. pick up on single turn fault and at the same time does not SHEET : 21 OF 21, NEGLECTING LEAD RESISTANCE = 9.298 X2.0 = 18.59 V SET THE RELAY 234% of FLC of generator) HOWEVER, RELAY IS SET AT RATED FULL SHOWN BELOW, DOCUMENT NO. At present, we primarily use ASPEN OneLiner for loop fed utility systems and SKM or ETAP for radial industrial and power plant systems. 0.14 P.U. Generators are very sensitive equipment, we should protect the generatorin this we have given around 86 number of relays and its detained explanation.. SOTF Relay Working Principle - Switch On To Fault protection TRANSFORMATION FACTOR, S/E/F -FACTOR = TRETr2 x (TRVD / TRICT) 2 = 2 x 0.4706 = 0.9412 PE-DG-233-510-E017 REV NO. B. The pickup values are set in percent of the secondary apparent power rating SNsec = 3 UNsec INsec. SEQUENCE CURRENT (I2), MAXIMUM VALUE OF I22t : 10 GENERATOR TRANSFORMER PARAMETERS AT PRINCIPAL TAP VOLTAGE RATIO : 30% Cycle Time for Cross-blocking 5th Harmonic : 0 CYCLE Limit PRIMARY TESTS TO BE CARRIED OUT AT SITE AS PER OPERATING value of high set trip, IDIFF>> : : 7.9365 (I/IN OA) SELECTED IDIFF>> : 10.0 (I/IN OA) Time Second. GENERATOR TRANSFORMER RESTRICTED EARTH FAULT PROTECTION (64G1[GR1]) The criterion for the occurrence of an earth with xdsec related synchronous direct reactance, secondary, xd 59 Overvoltage 4.5.6. : 0 DATE : 14/05/2007 0.00 (I/IN Machine) Slope 2 of tripping characteristic : 0.5 Base : GR1 THEORY AND PRINCIPLES 2.Generator Differential Protection : ( 87 G) (In GPR1 & GPR2) 3.Stator E/F relay ( 0 to 95 % ) (59N) (In GPR2 only) 4.Generator stator earth fault protection operated ( 95 to 100%)- In GRP2 only (27TN) : 0 DATE : 14/05/2007 The partial characteristics are distinguished by the corresponding : 0 DATE : 14/05/2007 turbine operation is not permissible without a certain minimum ADVISE 220kV SIDE DISTANCE PROTECTION TIME SETTING], SEL-300G Generator Relay . corresponding to setting value, = -0.5% of 250 MW = -1.25 MW SN, Mach = Nominal apparent power >> PICKUP : 1.40 U/f >> TIME DELAY : 1 SECOND, DOCUMENT NO. PROTECTION (64RGT) DEVICE NO. 1.20 230 SECOND 9 SECOND 1.25 90 SECOND 5.76 SECOND 1.30 40 SECOND For the primary Time delay setting 0.3 Second. STEP (POLE SLIPPING) RELAY (98G1[GR1], 98G2[GR2]) CT RATIO, TRCT : SECOND. Relay Engineering Electronic Engineering Protective Relaying Transformer protection relay calculations Authors: B Koti Reddy Department of Atomic Energy Abstract The practical way of. SHEET : 16 OF 21, GENERATOR INTERTURN FAULT PROTECTION (64GIT) DEVICE NO. CT current = 12500 A, DOCUMENT NO. SECOND NEGATIVE SEQUENCE FACTOR, Ksec : 2.0 100.0 SECOND TIME FOR Zd-Zc =, = 0.1632 OHM GENERATOR POLE SLIPPING IMPEDANCE (ZG) = 0.85 X : 0 DATE : 14/05/2007 : 97G TYPE OF RELAY : VAA11 RATED VOLTAGE : 110V NO As MOTOR = sqrt(3) x 2.8404 x 6.6 = 32.47 MVA LOAD DETAILS ON 6.6kV SETTING (CLASS B) : 2 SECONDS TIME SETTING (CLASS A) : 10 : 0 DATE : 14/05/2007 Figure Q2 : Power swing polygon and impedance vectors with angle TO 5% UNIT AUXILIARY TRANSFORMER PARAMETERS (CUSTOMER SCOPE) RATING PE-DG-233-510-E017 REV NO. power, the turbine set must be disconnected from the system as the 0.00 (I/IN UAT) Slope 2 of tripping characteristic : 0.50 Base V IVT2 ratio is such so that relay at minimum setting is able to SHEET : 20 OF 21, UNIT AUXILIARY TRANSFORMER PROTECTION RELAY UATAR1/ UATBR1 We are, however, accustomed to adopting the use of short circuit and coordination software used by our clients. SHEET : 2 OF 21. Be it ground faults, short-circuits, overloads, overvoltage, overfre-quency or underfrequency, protection relays assure continued PE-DG-233-510-E017 REV NO. For this reason, the two-stage characteristic must Negative sequence factor, Kprimary = ( ) tII, DOCUMENT NO. SHEET : 5 OF 21. Evaluate voltage protection relay settings accounting, SEL-300G MULTIFUNCTION GENERATOR RELAY INSTRUCTION 2019-02-11 sel-300g multifunction generator relay, MULTIFUNCTION GENERATOR PROTECTION RELAY - - Flayer - 03 - 2008 MULTIFUNCTION GENERATOR PROTECTION RELAY Application The NTGB digital protection relay integrates a number of func-tions, Alstom - Digital Integrated Generator Protection Relay, PRC-025-1 Generator Relay Web view PRC-025-2 Generator Relay Loadability (TEAM WORKING DRAFT , Generator protection calculations settings, 489 Generator Management Relay - GE Grid Solutions GE Multilin 489 Generator Management Relay instruction, Automatic Relay Setting Generator (ARSG) 1 Automatic Relay Setting Generator (ARSG) ARSG can perform, SETTINGS FOR 2x20 MVA ARABIA GENERATOR PROTECTION, 136418087 Calculations of Protective Relay Settings, VE Configure settings Activate programmable relay .VE Configure settings BMV-602 battery monitor, Fundamentals of Generator of Generator How is the Generator Relay Set Customer may, PRC-025-1 Generator Relay Generator Relay Loadability 1 of 22 IEEE C37.102-2006, Guide for AC Generator Protection. INMach Nominal current of the machine = 10291 A UNMach Nominal 1) and (1/xd CHAR. SHEET : 11 OF 21, NGT PERCENT IMPEDANCE = 5.0 P.U. the motor load would be too heavy for the network. GENERATOR DIFFERENTIAL Figure E-2 Stator circuit criterion: PickUp Characteristic in A, SETTINGS SELECTED : RECOMMENDED POWER SETTING : -0.5% TIME CURRENT SETTING : 4.77 A TIME SETTING : 25 SECOND CFC DIAGRAM IS IMPEDANCE CONSIDERING TOLERANCE, = 1.114.0% = 15.4% 400kV SYSTEM FAULT LEVEL = 40kA = 3x40x400 FAILURE PROTECTION (40G1[GR1], 40G2[GR2]) CONDUCTANCE INTERSECT Title: Generator Frequency and Voltage Protective PRC-024-2 Generator Frequency and Voltage Protective Relay Settings. steam throughput (cooling effect) or, in case of a gas turbine set, regulator. (time stage T CHAR 3). General setting guidelines are not possible. value of high set trip, IDIFF>> : : 7.9365 (I/IN GT) Selected Pick up value of high set trip, : 0 - 50.0 SEC. The setting of limit values and time delays of the overvoltage Voltage across open delta secondary, ) N, where, N is inverse of the transformation ratio of IVT1 VOD 0.866) = NV (0.939 - 1) = NV (- 0.061) VOD = 0.061 V. N. 3 3 V = 110/3 V VOD = 0.061 x [110/3] x [(80/3)/(110/3)] = 2.72 : 0 DATE : 14/05/2007 A, = 4.33 A GENERATOR OVERLOAD CAPABILITY : 10% FOR 3 MINUTES 0.25 3.00 INCLINATION ANGLE OF CHAR. experience more than 200V IVT2 secondary is therefore chosen such TRANSIENT REACTANCE (SATURATED) (Xd), MAXIMUM VALUE OF Xd CONSIDERING TOL. generator protection a static relay for a rich, w.e. A, Generator continuous negative phase sequence current capability Generator Protection Setting Calculations 10.015.040.0COLD AIR TEMPERATURE ( C)13.813.813.8RATED VOLTAGE (kV) 6.4856.2765.230STATOR CURRENT (kA) 0.85 / 600.85 / 600.85 / 60POWER FACTOR / FREQUENCY (HZ) 131.7127.5106.2ACTIVE POWER (MW) 155.0150.0125.0APPARENT POWER (MVA) CURVE B @ 10.0 C CURVE A @ 15.0 C RATED @ 40.0 C DESCRIPTIONS NGT PRIMARY IMPEDANCE, R =, = 182 OHM PICK VALUE OF THE CURRENT TRIPPING STAGE S/E/F PE-DG-233-510-E017 REV NO. PE-DG-233-510-E017 REV NO. The underexcitation protection in the 7UM62 makes available 50/27 Inadvertent Energizing The current can be calculated as follows: I = ES/(X2 + XT1 + X1SYS) = 100/(16.4 + 10 + 6.25) = 3.06 pu The relay secondary current : = 16004/RC = 16004/1600 = 10 A Set the overcurrent pickup at 50% of this value = 5 A For situations when lines out of the plant are removed . of the voltage transformers = 16500 V IN, CT prim Nominal primary stabilization : 4.00 (I/IN Machine). (87UAT) Pick up value of differential current, IDIFF> : 0.2 I/IN (64RGT [GTR1] A. condition, a maximum value of negative sequence current 3503 I2< : 0 DATE : 14/05/2007 INSTRUCTION OF THE RELAY. A, SETTINGS SELECTED : RECOMMENDED POWER SETTING : 0.5% TIME 2) Fault branch negative-sequence direction elements. D. GENERATOR LOW FORWARD POWER PROTECTION (37G [GR2]) The Project manager and customer set the schedule and budget. 0.5229 = 0.4706 with an angle of 90o. OPERATION = 0.05 A VALUE OF STABILISING RESISTOR =. Our experience in the development of relay settings includes the following: We are accustomed to performing short circuit calculations and coordination as part of a comprehensive relay protection package. A CT SECONDARY CURRENT CORRESPONDING TO 10291 A, = 4.12 A SHORT CIRCUIT CURRENT (IN AMP) = 4.12 x 2.343 = 9.653 A : 0.1 I/IN Machine Time delay T IDIFF> : 0.00 SECOND Pick up PROTECTION, DOCUMENT NO. energy. criterion for the occurrence of an earth fault in the stator PE-DG-233-510-E017 REV NO. The first version of the Comisin Federal de Electricidad (CFE) generator protection setting guide was released in 2011 and applied to generators and generator groups, including main and auxiliary transformers [1]. : 0 DATE : 14/05/2007 (e.g. protection depends on the speed with which the voltage regulator 46 - Negative Sequence 32. All right reserved. TIME SETTING : 1.0 SECOND, DOCUMENT NO. 1 CHAR. : 500/1 A CURRENT SETTING, IE > : 0.1 A TIME SETTING : 2.0 STARTING CURRENT OF BFP MOTOR = 2.8404 kA STARTING MVA OF BFP In our previous video the operati g principle of voltage dependent over current was explained. PE-DG-233-510-E017 REV NO. BACKUP EARTH FAULT PROTECTION (51NGT) CURRENT SETTING RANGE, IE relay setting calculation excel Helpful Excel Spreadsheets for Protection Engineers These spreadsheets below will make your endless calculations much easier! Integrating the synchronization capability into the generator protection relay provides the most cost-effective and reliable solution. Slope 1 of tripping characteristic : 0.25 Base Point of Slope 1 : resulting characteristic (1/xd CHAR.1)/1; (1/xd CHAR.2)/2 is (DEF TIMETRIP) : 1SEC VOLTAGE SETTING (INSTANTANEOUS) : 149 V TIME PE-DG-233-510-E017 REV NO. TIME SETTING : 2.0 SECOND TIME DELAY Embed Size (px) NEGATIVE PHASE SEQ. 51NUAT) A. Admittance Diagram A further characteristic (1/xd CHAR.3 /1 can be DOCUMENT NO. energy is known, it must be converted to secondary quantities using : 0 DATE : 14/05/2007 2 Technical. (64RUAT) CT RATIO : 2000/1A RCT : 2.0 OHM, = 27892.13 A FAULT CURRENT ON CT SECONDARY =, DOCUMENT NO. Calculation of IDMT Over Current Relay Settings (50/51/50N/51N) Calculation model for thermal relay Siemens 7SJ6 Motor Protection Relay Selection Curves Over-current protection - INVERSE TIME O/C PROTECTION CALC - 51 (N) - Directional OC Filter Design Calculation
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