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Excitation System EXC6000

The main design features of EXC6000 all-digital (microprocessor-based) excitation system is that it still fully inherits the advantages of the reputed fourth-generation EXC6000 microprocessor-based excitation system on the market and achieves software-based functions, digital systems and intelligent detection.

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  • Technical Specifications
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Technical Features:

1.    Software-based functions, digital systems and intelligent detection.

2.    high-speed CAN field bus technology, and achieves signal interconnection within the excitation system.

3.    flexibly configured as A/B dual-channel mode.

4.    The regulator uses more CPU mode to achieve a synchronous AC sampling technology, the automatic mode using the classic PID + PSS2A adjustment mode.

5.    Multi-language interface, use high-performance mono / color industrial touch screen.

6.    Improve communication function.

7.    Flexibility to define the output node through a dedicated software.

8.    Powerful debugging software.

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

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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