Redundante Regelungssysteme für grosse Synchronmaschinen

Transcription

1 ABB Schweiz AG Dr. Rudolf Wieser UNITROL SYNCHROTACT Redundante Regelungssysteme für grosse Synchronmaschinen ABB Group -1-

2 Inhalt Redundante Regelungssysteme Anforderungen und Funktionen Redundanzlösungen Funktionseinheiten Regelungselektronik Stromrichter Schutz ABB Group -2- Ausblick

3 Excitation System Function Startup Control Protection ABB Group -3-

4 Operation within Capability Area region of underexcitation region of overexcitation active Power capacitive generator current limiter inducitive generator current limiter reactive power (P/Q) limiter maximum turbine power ABB Group -4- minimum field current limiter -1 Xq δ 2 U act -1 Xi IfL IfN Xd ϕ IGN maximum field current limiter reactive power Q

5 Operation within Capability Area ABB Group -5-

6 Application Requirements Excitation Systems U T20 [V] 1500 From AVR to Static Excitation Systems n=1+1...n= N-1, n-2; n = n=1, n=1, 1+1 ABB Group I EN [A]

7 Control & Converter Units Compact Converter and Control unit Single Configuration ABB Group -7-

8 Control & Converter Units Compact Converter and Control unit Redundant Configuration ABB Group -8-

9 Control & Converter Units Compact Converter and Control unit Triple Redundant Configuration ABB Group -9-

10 UNITROL 6080 System ABB Group -10-

11 UNITROL 6080 System ABB Group -11-

12 Multiple Converter Control TWIN Converter N-1 redundant Converter Single and Dual Redundant Control Configuration ABB Group -12- Converter UNL1436x 4 n 2...8

13 Multiple Converter Control N-1 Redundant Converter Triple Redundant Control Configuration Backup Field Current Regulator (BFCR) Independent Protection Functions ABB Group -13- Converter UNL1436x 4 n 2...8

14 UNITROL 6000 Static Excitation System ABB Group -14-

15 UNITROL 6000 Static Excitation System ABB Group -15-

16 UNITROL 6000 Static Excitation System ABB Group -16-

17 Converter Redundancy Controller Control is connected to redundant s All control connections by 10Mbit fiber optical links ABB Group -17-

18 Controller & Converter Redundancy Redundant Controller Control is non-exclusively allocated to redundant s All control connections by 10Mbit fiber optical links ABB Group -18-

19 Controller & Converter Redundancy Redundant Controller Control is non-exclusively allocated to redundant s All control connections by 10Mbit fiber optical links BACKUP ABB Group -19-

20 Controller & Converter Redundancy Redundant Converter Converter ABB Group -20-

21 Converter Redundancy Redundant Converter Current distribution control Individual Thyristor redundancy Redundant cooling fan ABB Group -21-

22 Converter Redundancy R+ R+ R+ R S T S+ S+ S+ T+ T+ T+ + - ABB Group -22- ONE Thyristor fail Still fulfil full load and field forcing TWO Thyristors fail (but not in the same branch) still fulfil full load and field forcing TWO Thyristors fail (in same branch) TRIP!!!!! (or n-2 redundancy)

23 Controller & Converter Redundancy BACKUP ABB Group -23-

24 Communication Redundancy BACKUP ABB Group -24-

25 Communication Redundancy BACKUP ABB Group -25-

26 Communication Redundancy BACKUP ABB Group -26-

27 Communication Redundancy BACKUP ABB Group -27-

28 Control Function Redundancy ABB Group -28- BACKUP Controller supervision Two control devices Supervised communication Supervised analog circuits Supervised auxiliary supply Redundancy state machine Automatic Control (voltage control) Manual Control (field current control) Required Interfaces Control Protection

29 Triple Channel Failure Sequence Type T6S U G IG I F AVR FCR 1 U G IG I F AVR FCR 2 I F BFCR n ABB Group -29-

30 Supply Redundancy Double Redundant power supply (principle) for a control device ABB Group -30- ICU = Input Coupling Unit PS = 24V Power Supply APD = Auxiliary Power Distribution unit (electronic current limiting)

31 Reliability Figures Reliability chart 24V Power supply ABB Group -31-

32 Reliability Figures Overall reliability chart Converter Protection Control Power Supply Device Communication (Links) ABB Group -32-

33 Outlook Plant Control Integration IEC61850 for Hydro- and Windpower Wide Area Control Systems Local stabilization with PSS Wide area monitoring (PMU) Wide area stabilization ABB Group -33-

34 Example II: 500 MVA Generator Damping of active power oscillations without PSS Active power P [W] Ca 0.12p.u Ie [A] with PSS Ca. 0.24p.u Active power Excitation current PSS output 2s ABB Group -34- Loss of 50% in transmission capacity Xnet= p.u Excitation current

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