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Excitation System EXC9100

All parts of the excitation system can achieve intelligent detection, intelligent display, intelligent control and intelligent information transmission. It also fully integrates EMC design and carefully selects low-power, high-quality industrial-grade integrated circuit chips to further improve the reliability and technical level of the excitation device.

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  • Technical Specifications
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1. The central control unit of EXC9100 all-digital excitation system adopts the streamlined circuit construction with mainstream ARM + new FPGA chip as its core.

2. Adopting IEEE PSS-2Aaccelerating Power System Stabilizer with standard transfer function.

3. Current equalizing technology of intelligent power converter.

4. The CAN BUS technique.

5. Configuration Programming.

6. Intelligent Control Technology.

7. All-digital system.

8. Perfect friendly HMI.

9. various outlet interface.

10. Comprehensive debugging software.

11. good electromagnetic compatibility.

12. Completely independent microcomputer/analogue three-channel and two-module with redundancy configuration.

13. Multi-CPU mode,SMT and no-fan configuration is adopted in the regulator.

14. multi-course 3-dimentioned Chinese display.

15. Advanced and reliable core control device.

16. High-speed AC sampling technique

17. Independent and intelligent detection system and perfect fault detection function.

18. the high-frequency pulse train trigger technology, low residual fast Field flashing technology.

19. Intelligent power cabinet.

20. Current equalizing technology of intelligent power converter.

21. The high-voltage pulse transformer.

22. Powerful fans stop running ability.

23. Unique SCR jumper.

24. Improve communication function.

25. Intelligent commissioning.

Performance:

No.

Content

Provision

Performance

1

Regulators performance indicators

Force-excitation ceiling voltage and time

100MW steam turbine1.8 times of the rated voltage.

50MW turbine : 2 times of the rated voltage.

The duration of not less than 10S.

Ceiling voltage is calculated as 80% of the terminal voltage.

Voltage response time

Less than 0.1S

The accuracy of the regulator

Less than ± 0.5%

Droop Range

Not less than ± 15%

Frequency and voltage droop change

When the frequency change of 1%, the voltage variation is not greater than ± 0.25% of rated

10% phase step in the condition of no load

Voltage overshoot amount of not more than 50% of the step, the oscillation is not more than 3 times, settling time is not greater than 10S

Excitation field-flashing

Voltage overshoot is not more than 15% of rated voltage, the oscillation is not more than 3 times, the adjustment time is not greater than 10S

Rated load rejection

Voltage overshoot is not more than 15% of rated voltage, the oscillation is not more than 3 times, the adjustment time is not greater than 10S

The adjustment range

AVR:70% to 110% rated voltage

FCRl: 20% no-load excitation current to 110% therated excitation current

Given speed

0.3%~1%/S

Nominal response

More than 50MW turbine and steam turbine 100MW of not less than two times per second rated excitation voltage, and the rest of not less than 1 times per second rated excitation voltage

The generator static voltage droop

Not more than ± 1%

2

The rectifier bridge

Current coefficient

Not less than 0.85

Rectifier redundancy

N-1

The maximum instantaneous value of the output voltage of the rectifier

1.1 times the rated excitation current, shall not exceed the amplitude of the voltage-to-ground voltage of 30%.

3

Inversion and overvoltage protection

Deexcitation overvoltage

Shall not be less than the factory test voltage to ground voltage amplitude of 30%, shall not exceed 50%.

ZNO

Chargeability of less than 60%, 20% of the capacity margin.

4

Power supply

Operating frequency range

45~82.5Hz

AC380V/220

+10%~-15%

DC220V/110V

-15%~+10%

5

System

Forced removal rate of excitation system

Not more than 0.2%

 

 

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