Description
GE DS2020UCOCN1G1A module
Contact: Mr. Lai
Wechat:17750010683
Whats app：+86 17750010683
Skype：+86 17750010683
QQ: 3221366881
3221366881@qq.com
What are the hazards of generator loss of excitation?
The impact of generator loss of excitation on the system mainly includes:
1. Low-excitation and loss-of-excitation generators absorb reactive power from the system and cause the voltage of the power system to decrease. If the reactive power reserve in the power system is insufficient, the voltage of some adjacent points in the power system will be lower than the allowable value, which will destroy the stable operation between the load and each power source, and even make the power system voltage collapse and collapse.
2. When a generator loses excitation, due to the voltage drop, other generators in the power system will increase their reactive output under the action of the automatic adjustment excitation device, thus causing some generators, transformers or lines to overcurrent, and their backup protection may misoperate due to overcurrent, thus expanding the scope of the accident.
3. After the loss of excitation of a generator, due to the swing of the active power of the generator and the drop of the system voltage, it may lead to the loss of step between the adjacent normal operation generators and the system, or between the various parts of the power system, causing the system to oscillate.
4. The larger the rated capacity of the generator, the greater the reactive power deficit caused by low excitation and loss of excitation, and the smaller the capacity of the power system, the smaller the ability to compensate for this reactive power deficit. Therefore, the greater the ratio of the unit capacity of the generator to the total capacity of the power system, the more serious the adverse impact on the power system.GE DS2020UCOCN1G1A
The impact of generator loss of excitation on the generator itself mainly includes:
1. Due to the slip after the loss of excitation of the engine, the differential frequency current appears in the generator rotor circuit. The differential frequency current will cause loss in the rotor circuit. If it exceeds the allowable value, the rotor will overheat. In particular, the thermal capacity margin of large units with direct cooling and high power rate is relatively low, and the rotor is more prone to overheating. The differential frequency current on the surface of the rotor may also cause serious local overheating or even burns on the contact surface of the slot wedge and retaining ring of the rotor body.
2. After the loss-of-excitation generator enters the asynchronous operation, the equivalent reactance of the generator decreases, and the reactive power is absorbed from the power system. The greater the active power before the loss of excitation, the greater the slip, the smaller the equivalent reactance, and the greater the reactive power absorbed. After loss of excitation under heavy load, the generator stator will overheat due to overcurrent.
3. For large turbogenerators with direct cooling and high power rate, the maximum value of the average asynchronous torque is small, the inertia constant is also relatively low, and the rotor is also significantly asymmetric in the longitudinal and transverse axes. Due to these reasons, after loss of excitation under heavy load, the torque and active power of the generator will oscillate violently and periodically. For hydro-generators, due to the small maximum value of the average asynchronous torque and the asymmetry of the rotor in the longitudinal and transverse axes, a similar situation will occur when the generator is operated under heavy load. In this case, there will be a large or even exceeding rated motor torque periodically acting on the generator shaft system and transmitted to the base through the stator. At this time, the slip also changes periodically, its maximum value may reach 4%~5%, and the generator will periodically and seriously overspeed. These situations directly threaten the safety of the unit.
4. During loss-of-excitation operation, the magnetic leakage at the end of the stator will increase, which will overheat the components at the end and the iron core at the side.
IS420UCPAH2A
IS420UCPAH1A
IS420PSCAH1B
IS420PPDAH1B
IS420ESWBH5A
IS420ESWBH4A
IS420ESWBH3A
IS420ESWBH2A
IS420ESWBH1A
IS420ESWAH5A
IS420ESWAH4A
IS420ESWAH3A
IS420ESWAH2A
IS420ESWAH1A
IS410TVBAS2B
IS410TRLYS2F
IS410TRLYS1F
IS410TRLYS1D
IS410TRLYS1B
IS410TBCIS3C
IS410TBCIS2C
IS410TBCIS1C
IS410TBAIS1C
IS410SUAAS1A
IS410STCIS6A
IS410STCIS4A
IS410STCIS2A
IS410STAIS2A
IS410SSCAH2A
IS410SRLYS2A
IS410JPDSG1A
IS410JPDHG1A
IS410JPDGH1A
IS410JPDEG1A
IS410JPDDG3A
IS410JPDDG2A
IS400WROGH1A
IS400WROFH1A
IS400WROBH1A
IS400WPDFH2A
IS400WPDFH1A
VMIPCI-5565
VMIPCI-5661
VMIPCI-5664
VMIPCI-5666
VMIPCI-5700
VMIPCI-5760
VMICPCI-5652
VMICPCI-5653
VMIACC-5594
VMIPC4-7301
VMIPMC-5579
VMIPMC-5565
VMIPMC-5576XL
VMIVME-5651
VMIVME-7765
VMIVME-7751
VMIVME-7750
VMIVME-5576
VMIVME-5565
VMIVME-4132
VMIVME-3113A
VMIVME-2540
VMIVME-2128
VMIVME-1182
VMIVME-1128
VMIVME-4132-011
VMIVME-4140
VMIVME-4140-000
VMIVME-4140-000000
VMIVME-4140-010000
VMIVME-4215
VMIVME-4512
VMIVME-4514
VMIVME-4514A
VMIVME-4900
VMIVME-4905
VMIVME-4911
VMIVME-4941
VMIVME-5010
VMIVME-5010-8
VMIVME-5504
VMIVME-5521
VMIVME-5530S
VMIVME-5530S332-000132-C
VMIVME-553IS
VMIVME-5550
VMIVME-5565
VMIVME-5565-010
VMIVME-5565-010000
VMIVME-5565-100000
VMIVME-5565-110000
VMIVME-5567-000
VMIVME-5576
VMIVME-5576-000
VMIVME5588
Vmivme-5588
VMIVME-5588DMA
VMIVME-5599
VMIVME-5651
VMIVME-5740
VMIVME-6005
VMIVME-6015
VMIVME-6016
VMIVME-745
VMIVME7452
VMIVME-7452
VMIVME7452-500140
VMIVME-7452-500140
VMIVME-7455
VMIVME7455-30
VMIVME-7455-30
VMIVME7459
VMIVME-7459
VMIVME-7486
VMIVME-7487
VMIVME-7487A
VMIVME-7588
VMIVME-7589
VMIVME-7592
VMIVME-7592-940
VMIVME-7614
VMIVME-7648-540
VMIVME-7648-740
VMIVME-7651
VMIVME-7658
VMIVME-7664
VMIVME-7696-650
VMIVME-7697-550
VMIVME-7697-850
VMIVME-7698-146
VMIVME-7700-110000
VMIVME-7740
VMIVME-7750
VMIVME-7750-456-S2
VMIVME-7750-734
VMIVME-7750-74000
VMIVME-7750-740000
VMIVME-7750-746
VMIVME-7750-934
VMIVME-7751
VMIVME-7765
VMIVME-7807
VMIVME-7807-41100
VMIVME-7807-412010
VMIVME-7807RC-412010
VMIVME-7807RC-420001
VMIVME-9064
VMIVME-DR11W
VMIVME-M-485
VMIVME-VMXC-7
PCI-5565PIORC-110000
PCI-5565PIORC-111000
PCI-5565PIORC-210000
PCI-5565PIORC-211000
PCI-5565
PIORC-110000
PCI-5565
PIORC-111000
PCI-5565
PIORC-210000
Company advantage service:
1.Has been engaged in industrial control industry for a long time, with a large number of inventories.
2.Industry leading, price advantage, quality assurance
3.Diversified models and products, and all kinds of rare and discontinued products
4.15 days free replacement for quality problems
1.Has been engaged in industrial control industry for a long time, with a large number of inventories.
2.Industry leading, price advantage, quality assurance
3.Diversified models and products, and all kinds of rare and discontinued products
4.15 days free replacement for quality problems
All kinds of module card driver controller servo motor servo motor embedded card wires and cables Power module control module is applicable to steel, hydropower, nuclear power, power generation, glass factory, tire factory, rubber, thermal power, paper making, shipping, navigation, etc
ABB — AC 800M controller, Bailey, PM866 controller, IGCT silicon controlled 5SHY 3BHB01 3BHE00 3HNA00 DSQC series
BENTLY — 3500 system/proximitor, front and rear card, sensor, probe, cable 3500/20 3500/61 3500/05-01-02-00-001 3500/40M 176449-01 3500/22M 138607-01
Emerson — modbus card, power panel, controller, power supply, base, power module, switch 1C31,5X00, CE400, A6500-UM, SE3008,1B300,1X00,
EPRO — PR6423 PR6424 PR6425 PR6426 PR9376 PR9268 Data acquisition module, probe, speed sensor, vibration sensor
FOXBORO — FCP270 FCP280 FCM10EF FBM207 P0914TD CP40B FBI10E FBM02 FBM202 FBM207B P0400HE Thermal resistance input/output module, power module, communication module, cable, controller, switch
GE —- IS200/215/220/230/420 DS200/215 IC693/695/697/698 VMICPCI VMIVME 369-HI-R-M-0-0-E 469 module, air switch, I/O module, display, CPU module, power module, converter, CPU board, Ethernet module, integrated protection device, power module, gas turbine card
HIMA — F3 AIO 8/4 01 F3231 F8627X Z7116 F8621A 984862160 F3236 F6217 F7553 DI module, processor module, AI card, pulse encoder
Honeywell — Secure digital output card, program module, analog input card, CPU module, FIM card
MOOG — D136-001-007 Servo valve, controller, module
NI — SCXI-1100 PCI – PXIE – PCIE – SBRIO – CFP-AO-210 USB-6525 Information Acquisition Card, PXI Module, Card
Westinghouse — RTD thermal resistance input module, AI/AO/DI/DO module, power module, control module, base module
Woodward — 9907-164 5466-258 8200-1300 9907-149 9907-838 EASYGEN-3500-5/P2 8440-2145 Regulator, module, controller, governor
YOKOGAWA – Servo module, control cabinet node unit
Main products:
PLC, DCS, CPU module, communication module, input/output module (AI/AO/DI/DO), power module, silicon controlled module, terminal module, PXI module, servo drive, servo motor, industrial display screen, industrial keyboard, controller, encoder, regulator, sensor, I/O board, counting board, optical fiber interface board, acquisition card, gas turbine card, FIM card and other automatic spare parts
ABB — AC 800M controller, Bailey, PM866 controller, IGCT silicon controlled 5SHY 3BHB01 3BHE00 3HNA00 DSQC series
BENTLY — 3500 system/proximitor, front and rear card, sensor, probe, cable 3500/20 3500/61 3500/05-01-02-00-001 3500/40M 176449-01 3500/22M 138607-01
Emerson — modbus card, power panel, controller, power supply, base, power module, switch 1C31,5X00, CE400, A6500-UM, SE3008,1B300,1X00,
EPRO — PR6423 PR6424 PR6425 PR6426 PR9376 PR9268 Data acquisition module, probe, speed sensor, vibration sensor
FOXBORO — FCP270 FCP280 FCM10EF FBM207 P0914TD CP40B FBI10E FBM02 FBM202 FBM207B P0400HE Thermal resistance input/output module, power module, communication module, cable, controller, switch
GE —- IS200/215/220/230/420 DS200/215 IC693/695/697/698 VMICPCI VMIVME 369-HI-R-M-0-0-E 469 module, air switch, I/O module, display, CPU module, power module, converter, CPU board, Ethernet module, integrated protection device, power module, gas turbine card
HIMA — F3 AIO 8/4 01 F3231 F8627X Z7116 F8621A 984862160 F3236 F6217 F7553 DI module, processor module, AI card, pulse encoder
Honeywell — Secure digital output card, program module, analog input card, CPU module, FIM card
MOOG — D136-001-007 Servo valve, controller, module
NI — SCXI-1100 PCI – PXIE – PCIE – SBRIO – CFP-AO-210 USB-6525 Information Acquisition Card, PXI Module, Card
Westinghouse — RTD thermal resistance input module, AI/AO/DI/DO module, power module, control module, base module
Woodward — 9907-164 5466-258 8200-1300 9907-149 9907-838 EASYGEN-3500-5/P2 8440-2145 Regulator, module, controller, governor
YOKOGAWA – Servo module, control cabinet node unit
Main products:
PLC, DCS, CPU module, communication module, input/output module (AI/AO/DI/DO), power module, silicon controlled module, terminal module, PXI module, servo drive, servo motor, industrial display screen, industrial keyboard, controller, encoder, regulator, sensor, I/O board, counting board, optical fiber interface board, acquisition card, gas turbine card, FIM card and other automatic spare parts
