SCR components are rigorously screened, and for imported components, the following series can be adopted:
Excitation regulators integrate with multiple advanced control laws such as PID, PID+PSS, linear optimal excitation control, self-adaptive optimal excitation control, nonlinear dynamic PSS and can meet requirements for various system control.
The stable and fast operating 32-bit floating-point digital signal processor of TMS320C3X Series produced by TI Company, USA is used as core hardware platform, with the help of 32-bit high-speed programmable controllers (PCC) of 2005 Series produced by B&R Company, Austria to achieve logic control, operation and communication of system, thus improving the operating speed and high reliability of the device as a whole.
Double microcomputer channels are used. Each microcomputer channel contains two DSP control plates, and there are four DSP plates for hierarchical control for double channels. The high-speed CAN network enables real-time messaging and highly redundant system of fault detection of cross-check.
With color LCD touch screen, graphical user interface and Help menu in Chinese, and powerful functions of engineering management. Dynamic parameter display and set point changing are enabled. There is a real-time display of the entire electrical parametric curves of excitation system according to users’ requirements, and manual or automatic fault recording to help users analyze and recall the incidents.
With the mode of blower-free circular heat pipe cooling for the rectifier cabinet, the output capacity and operating reliability of the power rectifier cabinet is greatly improved. The maximum output current of single cabinet without air can be 3000A, and the rated current is 2S00A. if the configuration scheme of parallel connection of four cabinets is used, the output power and current can meet the requirements for excitation power by large-scale, including 1000MW capacity level, hydroelectric power, thermal power and nuclear power generator set.
The de-excitation scheme of combination of large-capacity ZnO de-excitation resistors and temperature sensitive resistor PTC with positive temperature coefficient is used for de-excitation, and the property of positive temperature of PTC component is used for pressure build-up in order to cooperate with large-capacity ZnO nonlinear resistors for de-excitation, thus freeing the ability of pressure buildup of de-excitation from the restriction of de-excitation switch, improving the reliability of de-excitation system, raising de-excitation speed and reducing the loss of accidents.
Range of application
Applicable to various generators set from 300MW to 700MW
Excitation system for synchronous generators
Excitation system for steam turbine generator set
Excitation system for hydraulic turbine generator set
Excitation system for gas turbine generator set
New and transformed generator set suitable for various excitation modes
Self-parallel excitation system
External static excitation system
Compound excitation system
DC exciter excitation system
AC exciter excitation system
Brushless excitation system
Applicable environment
Altitude: less than 4500 meters
Ambient temperature: -20~45°C
Relative humidity: Not more than 90%
No explosive medium or combustion medium in the environment, and no gas and electricity-conducting dust that can erode metals and ruin insulation in the air.
No violent vibration, hard impact or jolt
Special environmental requirements can be negotiated by both parties.
Instruction on order
Please provide the color disc of the outer covering of cabinet
Please let us know at the order if other sizes are chosen for the cabinet
Basic configuration and features
SCR components are rigorously screened, and for imported components, the following series can be adopted:
ABB Series of Switzerland
Dynex (formerly Mitel Series) of Britain
WESTCODE Series
ELJPEC Series of Germany
Good heat dissipation effects with aluminum radiator and serially connected air duct
Imported low-noise cooling fan, 1+1 redundancy, in a cyclic operating mode of the primary and the stand-by, automatic switching in case of faults
Dual power supply for the power of blower, with automatic switching
Modularized rectifier components, easy to dismantle and maintain
Optional modes for resistive capacitive protection: distributed, centralized epoxy casting, high voltage pulse transformer (15KV)
Realization of multi-bridge parallel-connection operation of the start-stop of blower and the intelligent control of power cabinet switching, with current stabilizing factor not less than 0.95
Intelligent detection unit—voltage and current detection, pulse detection, blast temperature and wind pressure detection, and other fault detection
Applicable environment
Altitude: less than 4500 meters
Ambient temperature: -10~45°C
Relative humidity: Not more than 90%
No explosive medium or combustion medium in the environment, and no gas and electricity-conducting dust that can erode metals and ruin insulation in the air.
No violent vibration, hard impact or jolt
Special environmental requirements can be negotiated by both parties.
Main models
NSD-LC-STR-2000 single cabinet and single bridge, with rated output as 2,000A
NSD-LC-STR-1600 single cabinet and single bridge, with rated output as 1,600A
NSD-LC-STR-1000 single cabinet and single bridge, with rated output as 1,000A
NSD-LC-STR-500/2 single cabinet and double bridges, with rated output as 1,000A
NSD-LC-STR-500 single cabinet and single bridge, with rated output as 500A
