Description
IMMFP12 DCS system
IMMFP12 DCS system
Module Clips Drive controller servo motor
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.IMMFP12 DCS system
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.
美国GE 8521-LC-MT 通用电气 PLC模块
GE DS200DMCBG1AED DS215DMCBG1AZZ03A 通用电气模块
GE SR489-P5-HI-A20-E 发电机管理继电器 489-P5-LO-A20
GE VMIACC-5595-208 350-805595-208L 八端口反射内存交换机
GE IC695CRU320CA-EL 冗余CPU模块 IC695CRU320-BB
MOOG m128-010 穆格 控制器 加密狗模块
GE VMIVME2510B 可编程控制器 输入/输出板
SR469-P1-HI-A20 GE模拟输出 469 电机管理继电器
GE TEWS板卡 TPMC815-50 通用电气模块 TPMC871-50
DS200SDCIG2AHB GE DC电源和仪器板 通用电气
GE D20C TERMINATION 机器人系统 伺服控制系统
DS200SDCIG2AHB GE 直流电源 反馈卡 电路板
D136-001-007 美国MOOG 穆格控制器 驱动器 加密狗系列
GE IC697CPX928 可编程逻辑控制器 IC697CPX928-FE
GE VMIVME 4140-001 VMIVME4140 VMIC系列主板板卡
IC698PSA100 GE I/O通信 CPU处理器模块 控制系统
DS200RTBAG2AFB GE 通用电气 电源模块 电路板反馈卡
IS200EGDMH1AFF GE 电路板 CPU处理器模块 电源模块
VMIVME-7700 GE 电路板 CPU处理器模块 电源模块
GE VMIVME7740-841 CPU处理器模块 控制板 通用电气
IS220PPROS1B GE 电路板 CPU处理器模块 电源模块
DS200DMCBG1AKG GE 通用电气 电源模块 DC电源板
DS200DMCBG1AED GE 通用电气 电源模块 电路板反馈卡
DS200DCFBG1BGB GE 直流电源 反馈卡 电路板 模块进口备件
GE DS215DMCBG1AZZ03A 通用电气电子电路卡 DS215KLDCG1AZZ03A
GE PQMII-T20 美国通用电气 电能质量表 品质保证
GE IS420ESWBH3A 美国燃机卡通用电气模块
GE IC698CPE040 中央处理器 微处理器 控制器
VMIVME-7486 VMIVME-7750 GE 电路板 控制器系统
IS215ACLEH1BB GE 电路板 CPU处理器模块 电源模块
IC698CPE040-JP GE 电路板 CPU处理器模块 控制系统
GE IC697CPX935 中央处理机 IC697CPX928 美国通用电气
GE IC698RMX016 VMIVME-5567-100 CPU冗余系统
IS420UCSBH4A GE 通用电气控制器 模块 卡件 IS420ESWBH3A
IS220PPRFH1A GE 电路板 CPU处理器模块 电源模块
IC698ETM001 GE 以太网接口模块 IC698CPE030
HE700GEN200 GE HE700GEN100 卡件模块备件 美国通用电气
IS220PPRFH1B GE 控制器IO模块 CPU处理器模块 电源模块
GE DS200DCFBG1BLC 卡件模板 电源板Mark V系列
GE IC698CPE040-JP 中央处理器 IC698CPE040 控制主板
IS220PAOCH1A GE 控制器IO模块 CPU处理器模块 电源模块
IC690RFH008 GE 美国控制器模块 通用电气模块
GE VMIVME-7807 VMIVME-017807-413000 控制卡 VMI系列主板供应
IS220PPDAH1B GE 控制器IO模块 CPU处理器模块 电源模块
8851-LC-MT 美国GE 8810-HI-TX 网络控制器 PLC模块 工控备件
GE IS420UCSBH1A Mark VIe 控制器 IS420UCSBH4A
GE IC698CMX016-ED 控制存储器Xchange模块 IC698CPE030
GE 369-HI-R-M-0-0-0-E 电机保护继电器 保护装置
IC697CPM790-GD GE CPU单元 控制系统 通用电气模块 电源模块
GE DS200LDCCH1ALA 变频器 控制主板单元 Mark V系列驱动板
GE V7768-322001 通用电气 工控备件 控制系统模块
IP-QUADRATURE GE 控制器 通用计数器 PLC工控备件
IS220PDIAH1B GE 控制器IO包 CPU处理器模块 电源模块
GE VMIVME-7807RC CPU板 控制板主板 通用电气
ACC-5595-208 GE 反射内存交换机 集线器组件
CP320260 KOLLMORGEN 伺服驱动器 科尔摩根系列
IS200SPIDG1ABA GE 涡轮机专用I/O IS200SRTDH2ACB
IC695CPE310-ACAT GE CPU控制器 PACSystem RX3i系列
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
