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System Configuration
NR’s excitation system consists of numerical excitation regulator, thyristor rectifier, diode valve rectifier, de-excitation equipment and auxiliary cabinets. According to the different requirements of each excitation mode, the above equipments can be flexibly tailored to combine the compatible solution.
PCS-941X Digital Excitation Regulator
It consists of dual-channel configuration or three-channel configuration. Each channel is an independent regulation unit based on advanced hardware platform, which is based on multi-processor system including PowerPC, DSP and FPGA. The system provides all essential functions, such as PID regulation+ PSS strategy, many closed-loop and open-loop control laws, difference regulation, many limiters and protections, i.e. under-excitation limiter, over-excitation limiter, false strong excitation limiter, peak current limiter, V/F limiter, overvoltage protection on no-load, TV signal failure protection etc. And self-diagnose function, fault-tolerance control element, oscilloscope and event recording function are all equipped with. The HMI with a LCD and a 9-button keypad is friendly to users. And it is also easy to communicate with PC at higher level. Ethernet interface, optical fiber interface and RS-232/RS-485 serial ports are supplied for communication.
PCS-9420 Thyristor Rectifier
A lot of levels of current output are supplied to match the requirements of users, i.e. 250A, 800A, 1200A, 1800A, 2400A and 3000A. Parallel-connected multi-cabinet operational mode is adopted. The coefficient of equalizing current is larger than 0.9. Aluminum Radiator or Heat Pipe Radiator can be selected alternatively.
PCS-9421 Diode Rectifier
A lot of levels of current output are supplied to match the requirements of users, i.e. 1800A, 2400A and 3000A. Parallel-connected multi-cabinet operational mode is adopted. The coefficient of equalizing current is larger than 0.9. Aluminum Radiator or Heat Pipe Radiator can be selected alternatively.
PCS-943X De-excitation Equipment
Linear or nonlinear resistor and magnetic blow-out switch are supplied in de-excitation equipment. And overvoltage protection is also equipped with.
PCS-944X Auxiliary Equipment
Special devices for complicated requirements and logic circuits are equipped with the cabinet.
