-POWERFUL SOLUTIONS- HITACHI EXCITATION SYSTEM VCS-6000 The HITACHI VCS-6000 State-of-the-Art Voltage Regulator System Meets or Exceeds all U.S., Canadian & European Engineering Standards Reasons for Excitation System Upgrade The expansion of the power distribution The Digital Automatic Voltage Regulator and Power network in recent years increased the necessity for System Stabilizer are the most cost effective measures stable operation of individual generators. Known issues in power transmission stabilization strategies. in this context are a decrease in stability as transmission HITACHI’s solution is the digital, static VCS-6000 distances and load inconsistencies increase. For green Excitation System with the integrated Power System site unit projects and modernization projects, high Stabilizer. Using a state-of-the-art 32 bit RISC system efficiency and easy maintenance of control processor, the VCS-6000 integrates various functions devices are mandatory in the electric power industry. into the voltage control system to achieve a responsive For modernization projects, system and spare part and reliable network. obsolescence are also important decision factors in deploying a new excitation system. Power Line Network Power Plant Needs and Our Solution G Stable Power Supply Distribution Network Flexible Plant Management Digital-AVR Centralization of Information Local Power System Stabilizer Network Quick Response & High Efficiency Human Machine Interface Information Network Easy System Maintenance Industries Maintenance Tool & Consumer Systems Integration 2 Key Components of Digital-AVR Control Required Functions: The primary function of the Digital AVR is regulating the - Multifunction Controller generator voltage and matching it with the voltage - High Reliability (system redundancy, self-diagnostic reference value (90R set point). Hence, the AVR has a key function, compact design) role in supplying stable voltage during power swings in the - Centralized System Supervision - Ease of Operation, Maintenance, and Safety power generation network. - Power System Stabilizer Outline of Digital-AVR Proposed improvement by means of Power Stability genarator Excitation System Transient AVR: Maintenance of Generator Voltage Dynamic PSS: Improvement of the power system stability AVR PSS PT AVR setting value + − KA G2 Gn Decrease in Power Stability Main Transformer Main Breaker Power Grid 1 T G1 Local Power Oscillation(1.0Hz) Generator VG (Generator Voltage) Turbine Rotational Torque AVR: Automatic Voltage Regulator PSS: Power System Stabilizer Inter-system Power Grid 2 Power Oscillation (0.3-0.5Hz) 3 CONTROL SYSTEM CONFIGURATION Parallel Redundant Control System Capacity Expansion Each control channel A/B has parallel control Each control channel A/B has the capability to hardware for gate signal control and for I/O fire 10 parallel thyristor bridges. Hence, there is signal interface. Hence, there is no impact on no limitation to the excitation rating. plant operation if one channel failure occurs. Diagnostic Identification The HMI stores fault information with time stamp for both control channels. Typical Thyristor Excitation System VCS-6000 (Redundant AVR) 52 HMI VCMI(A) Optic RDIO RDIO PT-A Signal AI Control GPG DI Detect TB Optic VCMI(B) DO Tool RDIO PT-B RDIO Signal AI Control GPG Detect EX-TR PS(A) AC Max 10 Parallel 41 THY#n Optic VCMI; Voltage Control Module Integrated THY#1 PS(B) DC GPG; Gate Pulse Generator GDIO EX-TR; Excitation Transformer GDIO; Gate Driver & I/O DC CBC; Craw-Bar Circuit HMI; Human Machine Interface Crow- RDIO; Remote Digital I/O CBC G Bar PS; Power Source DR inches (mm) AC- THY THY AVR FCB (1) (2) 90.6" HMI (2,300) 47.2" (1,200) 43.3" 39.4" 43.3" 39.4" (1,000) (1,100) (1,100) (1,000) 165.4" (4,200) Typical dimensions for 375VDC / 2000ADC class 4 VCS-6000 COMPONENTS � LOCAL OPERATION / MONITORING MAIN MENU ONLINE PROCESS MONITOR CONTROL PANEL Reset Alarm AVR/AER Selector Fault Indication Scroll button Channel On-Off Excitation ON/OFF Limiter Action Mode Selection Release (Master/Slave) Selector Mode Selection AVR-AER (FCR) FCB ON/OFF (Local-Remote) Var/PF On-Off Selector � HMI (mounted on the front panel of AVR) � COOLING FAN � Each THY panel has on-line HPSI maintenance capability of High potential signal inter- the fan (hot-swap) face for signal calculation at VCMI. Input Signals: � FAN POWER SUPPLY *EX-TR secondary voltage *Generator field voltage CONTACTOR *Generator field current *Crow-bar voltage � VCMI *Signal detection (V, P, Q, f, Vfdc etc.) *AVR control *Analog input: 20 points *Analog output: 7 points *Gate pulse generator *Historical trend data � record AC FIELD CIRCUIT BREAKER (41) Main field circuit breaker provides disconnect from � RDIO excitation field circuit. VCMI controls these I/O AC-FCB is applicable for the signals through the � GDIO ratings; 690V AC, 4,000 ADC. optical cable transmission GDIO supplies the gate between RDIO and VCMI. pulse to the thyristor *Digital input: 16 points from the gate trigger *Digital output: 10 points signal received from � THYRISTOR BRIDGE SECTION VCMI. Hitachi design is based on N+1 Functions: parallel redundancy as a standard. *Gate pulse adjustment *Digital input: 16 points *Digital output: 6 points Example of AC Field Circuit Breaker Control System Arrangement 5 HITACHI Excitation System VCS-6000 Uses State-of-the-Art Digital Control Technology for Synchronous Machines, Providing Excellent Control and Easy Maintenance. VCS-6000 FEATURES ADAPTABILITY EASE OF USE The VCS-6000 Automatic Voltage Regulator has been VCS-6000 provides diagnostic functions, control installed in all sizes of applications from small rotating functions and limiters as follows: excitation system to large static excitation system.  Fault detection of each module by sophisticated self-diagnostic function. FLEXIBILITY  High-speed historical trend; records data for testing Selection of simplex or redundant system is available and fault analysis. as required by the customer.  Soft start function for prevention of generator voltage over-shooting. RELIABILITY Auto tracking function between actual operating mode  VCS-6000 assures high component reliability as a and other control modes for bumpless transfer. result of the following approach:  Enhanced crow-bar circuit prevents energy from  Consolidated design results in fewer boards and less coming back into the control system following a internal wiring. collapse of the field (CEMF)  Varnish coating for of all boards inhibits corrosion and  Local control panel support for quick troubleshooting extends life. using alarm history log (historian).  Aging test for all boards. STABILITY & REDUNDANCY LOCAL OPERATION Complete parallel redundant Excitation System One simple local operation screen on front door of AVR through the following design features: panel prevents confusion and potential for misoperation.  Assuring stable plant operation by application of  Displays system parameters (Vg, Pg, Qg, etc;.) two parallel control channels.  Raise/Lower commands of reference value.  Assuring stable plant operation by implementation of N+1 Thyristor bridge circuits as standard design.  ON/OFF command and control mode selection command for excitation control for both channels in  Assuring stable plant operation by application redundant system. of DC/DC & AC/DC control power supplies. ELECTRO-MAGNETIC INTERFERENCE MAINTAINABILITY Application of optical cable minimizes electro-magnetic VCS-6000 provides excellent maintainability of the excitation control system using the Commissioning & influence of signals. Application of fiber-optic cables Maintenance Tool. for gate-firing signals eliminates susceptibility to electromagnectic interference.  Facilitates online replacement by isolation of disfunctional control channel from operation.  One thyristor bridge per panel assembly improves maintainability and easy identification of disfunctional bridge.  Safe maintenance, online monitoring and tuning with Commissioning & Maintenance Tool. 6 VCS-6000... Competitive Advantage Through High-Tech Engineering EXAMPLES Brushless Exciter(BL-EX) Potential Source Rectifier Exciter(THY-EX)  Available maximum 10 thyristor (THY) cubicles PT inches depending on required exciter rating. AVR(VCMI) CT (mm)  AVR cubicle is same dimension for both single or PWM duplicate AVR. AVR 90.6" AC G PMG -EX (2,300) HMI PT Fig 5 AVR CT (VCMI) Brushless Exciter with PMG EX-TR (Mainly apply for fossil power plant) Fig 1 THY AC-FCB Apply AC-FCB PT 39.4" (Applicable for medium capacity generator) AVR(VCMI) (1,000) 31 CT 31.5" G (800) EX-TR PWM Fig 7 AVR cubicle AC G -EX dimension (Sample) inches Fig 6 (mm) Brushless Exciter without PMG AC- THY THY (Mainly apply for hydro power plant) AVR PWM Rating FCB (1) (2) 90.6" Input 110 V, 3 phase (2,300) 15 A continuous, 22.5 A, 60 S HMI Output 60 A continuous, 90 A, 60 S Alternator-Rectifier Exciter(AC-EX) 47.2" AVR CT PT (VCMI) (1,200) 39.4" 43.3" 43.3" 39.4" PWM (1,000) (1,100) (1,100) (1,000) 41 165.4" (4,200) AC HFG G -EX Fig 2 Fig 8 375VDC 2,000 A DC class cubicle dimension inches AC-EX with HFG (mm) (Sample) AVR THY 90.6" PT AVR (2,300) HMI CT (VCMI) EX-TR Fig 9 Fig 3 THY Tool 200 VDC 200 A class Apply DC-FCB (Applicable for large capacity generator) Cubicle Dimension 47.2" DC- 31 (Sample) (1,200) FCB G 43.3" 39.4" (1,100) (1,000) inches (mm) AC- THY THY THY THY DC- FS AVR 90.6" BUS (1) (2) (3) (10) BUS (2,300) HMI Fig 4 500VDC 8,000A DC class 63" cubicle dimension (1,600) 31.5" 47.2" 47.2" 47.2" 47.2" 39.4" 31.5" 39.4" (Sample) (800) (1,200) (1,200) (1,200) (1,200) (1,000) (800) (1,000) 7 WORLD WIDE SUPPORT HITACHI Provides Innovative & Reliable Solutions, Products & Services World-Wide: Hitachi Canada, Ltd. Hitachi India Pvt, Ltd. Head Office Hitachi, Ltd., Power & Industry Division 10th Floor, Hindustan Times House Power Systems 460-10655 Southport Road S.W. 18-20, Kasturba Gandhi Marg Akihabara Daibiru Building, Calgary, Alberta New Delhi-110001 18-13, Soto-Kanda 1-chome, Chiyoda-ku, T2W 4Y1 Tel: +91 (11) 2331-5635 Tokyo, 101-8608 Japan Tel : +1 (403) 278-1881 Fax: +91 (11) 2331-3742 Tel: +81 (3) 3258-1111 Fax: +1 (403) 278-1810 Mechanical Dynamics and Analysis, Ltd. Hitachi Asia, Ltd. Hitachi China, Ltd. Control Systems (MD&A CS) (Headquarters) Beijing Headquarters 328 South Link Lane, Suite 13 Power & Industrial Group 18/F., Beijing Fortune Building Fort Collins, CO 80524 16 Collyer Quay 5 Dong San Huan Bei Lu Tel: +1 (970) 224-2223 #20-00 Hitachi Tower, Chao Yang District Fax: +1 (970) 224-1700 Singapore 049318 Beijing 100004 email: csd@MDAturbines.com Tel: +65 (6535) 2100 Tel: +86 (10) 6590-8111 www.MDAturbines.com Fax: +65 (6535) 1533 Fax: +86 (10) 6590-8110 Hitachi America, Ltd. Hitachi Australia, Ltd. Hitachi China, Ltd. (Shanghai Branch) Power & Industrial Division (Head office) 18/F., Ruijing Building 50 Prospect Avenue Level 3. 82 Waterloo Road. No. 205 Maoming Road(s) Tarrytown, NY 10591-4698 North Ryde, NSW 2113 Shanghai 200020 Tel: +1 (914) 332-5800 Tel: +61 (2) 9888-4100 Tel: +86 (21) 6472-1002 Fax: +1 (914) 332-5555 Fax: +61 (2) 9888-4188 Fax: +86 (21) 6415-8310 Hitachi Europe, Ltd. Hitachi Australia, Ltd. Hitachi Mexico, S.A. de C.V. (European Headquarters) (Brisbane office) Andres Bello No.10 Piso 10 Power & Industrial Group Sky Level. 301 Coronation Drive Col. Chapultepec Polanco Whitebrook Park Lower Cookham Road Milton. QLD 4064 11560.Mexico.D.F. Maidenhead, Berkshire SL6 8YA,UK Tel: +61 (7) 3369-3962 Tel: +52 (55) 5282-9040 Tel: +44 (1628) 58-5000 Fax: +61 (7) 3369-8155 Fax: +52 (55) 5282-9042 Fax: +44 (1628) 58-5373 Hitachi, Ltd. Information & Control Systems Division Power Plant Control Systems Engineering Dept. 5-2-1, Omika-cho, Hitachi-shi, Ibaraki-ken, 319-1293 Japan Tel: +81 (294) 53-1111 Fax: +81 (294) 53-2230 This product is protected by the following patents and/or patent pendings. Patent: JP3314035, JP3706960 (US5594350) Patent Pending: JP2006-129631, JP2005-333486, JP2003-204699 ® Copyright 2009 Hitachi,Ltd. No.VCS-6000-CATA-01E2 All rights reserved Printed in the USA 2009(MD&A)