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C0NQ.140.417



DVR-2000B Excitation Regulator User Guide



NANJING TURBINE ＆ ELECTRIC MACHINERY GROUP NANJING TURBINE POWER CONTROL CO.,LTD



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Contents 1 Introduction .................................................................................................................. 1 2 Features and Applications........................................................................... 2 2.1 Product Festures................................................................................................................ 2 2.2 Application areas............................................................................................................... 3 2.3 Operating condition .......................................................................................................... 3



3 Functional Overview and Specification ....................................... 4 3.1 Functional Overview ......................................................................................................... 4 3.1.1 Regulation and Control ......................................................................................... 4 3.1.2 Limit and protect.................................................................................................... 4 3.1.3 Other auxiliary function ........................................................................................ 5 3.2 Summary of qualification ................................................................................................. 5 3.2.1 A/D input parameter .............................................................................................. 5 3.2.2 Switching value input and output capability ....................................................... 5 3.2.3 Output parameters ................................................................................................. 6 3.2.4 Network interface ................................................................................................... 6 3.2.5 Power supply parameter ........................................................................................ 6 3.2.6 Index parameter ..................................................................................................... 6



4 System allocation .................................................................................................... 8 4.1 Electrical allocation........................................................................................................... 9 4.1.1 Excitation system diagram .................................................................................... 9 4.1.2 Input/output interface sketch map ....................................................................... 9 4.1.3 Hardware component .......................................................................................... 10 4.2 Structure allocation ......................................................................................................... 10 4.2.1 Cabinet constitution ............................................................................................. 10 4.2.2 Layered introduction ........................................................................................... 10



5 Fundamental Principle.................................................................................. 14 5.1 Fundamental Principle ................................................................................................... 14 5.2 Single board principle ..................................................................................................... 15 5.3 software instruction ........................................................................................................ 18 5.3.1 Main dispatcher.................................................................................................... 18 5.3.2 Interrupt routine .................................................................................................. 18



6 Keyboard, Display and Operation ..................................................... 23 2



6.1 Key board Operation Instructions................................................................................. 23 6.2 Main Menu Display ......................................................................................................... 23 6.3 Main Menu Display ......................................................................................................... 25 6.3.1 Measurement display ........................................................................................... 25 6.3.2 Parameter Setting................................................................................................. 26 6.3.3 Protection Withdrawal......................................................................................... 30 6.3.4 Switching input status ......................................................................................... 30 6.3.5 Drive Test .............................................................................................................. 31 6.3.6 System Test............................................................................................................ 31 6.3.7 Fault Recall ........................................................................................................... 32 6.3.8 Fault Waveform .................................................................................................... 33 6.3.9 Event Recording ................................................................................................... 33 6.3.10 Accuracy Setting ................................................................................................. 34 6.3.11 Unit Parameters.................................................................................................. 34 6.3.12 System Configuration ........................................................................................ 35 6.3.13 Test Option .......................................................................................................... 36 6.3.14 Other Test............................................................................................................ 36



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Introduction



DVR-2000B excitation regulator is a new generation of microprocessor-based excitation regulator, which depends on China Electric Power Research Institute, and developed by Nanjing Turbine & Electric Machinery Group Co. Ltd. It has consummate function of adjustment, control and limit protect, and prodigious improvement in computation speed, anti-EMI, reliability as well as facility in use. DVR-2000B generator excitation regulator takes the newest high speed 32-bit DSP of TI Corporation as the core, with the auxiliary device of large scale programmable logic controller, to make the control system on a chip and greatly improve the system stability. Simultaneously, external plate machine and large screen LCD greatly upgrades the human-machine interface and provide enormous convenient to the users.



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2 Features and Applications 2.1 Product Futures DVR-2000B Excitation Regulator, as a new generation of microcomputer excitation product, unifies the latest results of the excitation system research and many years operating experience with the first generation of excitation regulation device. The latest computer control technology, digital signal processor (DSP) technology and advanced network and communication technology have been successfully applied on this new product.



DVR-2000B has following features: 1.



Clear and accurate model



DVR-2000B excitation control system uses the series adjustment with excitation



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voltage hard negative feedback; all the models used are demonstrated to be with small error and high precision in the discretization by computer simulation and dynamic signal analyzer measurement. High measurement accuracy DVR-2000B excitation regulator using sampling 24 points per cycle, FFT, Completely eliminates influence of null shift to measuring accuracy, and 14-bit A/D conversion ensures accuracy and rapidity of measurement channel. Strong network communication function DVR-2000B excitation regulator is provided with strong communication function, double-channel, regulator and power cabinet are connected with reliable CAN-BUS, So as to achieve data share and coordinate control. Convenient and friendly human-machine interface DVR-2000B excitation regulator use large screen LCD (240*128), tree menu structure. The convenient and visual menu can achieve setting parameter, measurement display, test control, and other functions with keyboard. Test waveform fault type and event SOE are also can be displayed on the screen, using ESM-V1.0 software package makes realize the functions above more convenient Domestic fastest excitation regulator DVR-2000B uses the TI Corporation 32-bit DSP, whose speed is up to 150MHz. formidable data-handling capacity and fast floating-point computation ability of DSP provide the guarantee for the accurate digitization of excitation regulator model and realizations of other auxiliary functions. Highly integrate hardware design DVR-2000B uses large scale programmable logic controller CPLD, which realize conventional dozens of chips combination completed function by flexible programming, one chip accomplish all the peripherals circuit. Less hardware decrease device fault point, so the entire system reliability increases. Handsome and practical cabinet design, advanced and normative technique of product DVR-2000B uses standard 4U cabinet; back-insert structure makes signal-flow direction all the same, which decrease the affect of signal cross, and increase the anti-interference ability of the system. Cabinet uses totally increased structure, Integrated all boards which the regulator needs inside, whose self being a system. Main boards are all use multilayer, surface mounting technique.



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Unique anti-interference design By well-design, properly arrange earth connection, filtering, masking and other details, DVR-2000B anti-interference ability achieve stern level 3 in Chinese standard.



2.2 Applications DVR-2000B excitation regulator is applicable for three machine (brushless) excitation system with permanent magnetism machine excitation system.



2.3 Operating condition 1. 2. 3. 4. 5. 6.



No more than 1,000 meters above sea level Surrounding temperature -10℃～40℃ Relative humidity less than 90% No fire and explosion No conductive dust and chemical corrosion gas No strong electromagnetic interference



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3 Functional Overview and Qualification 3.1 Functional Overview DVR-2000B excitation regulator is mainly designed for keeping terminal voltage stabile, distributing reactive power between parallel units by proper droop setting, increasing power system transient stabilization and static stabilization by fast excitation response. Besides, DVR-2000B also has some auxiliary functions such as fault wave recording，event looking back, system self checking, intelligent debugging etc.



3.1.1 Regulation and Control Generator constant terminal voltage PID（proportion、integral、differential coefficient） is achieved by Auto mode. 2. Generator constant excitation current PID is achieved by Manual mode. 3. Auto and manual mode is followed each other, realizing no disturb by the mode switch. 4. Channels is followed each other, realizing no disturb by the channel switch. 5. Generator running on Constant Trigger angel. 6. Reactive power droop setting adjusting, whose direction can be set sign; Droop setting coefficient can be adjust 0-15% with step 0.1% 7. Static excitation system startup control 8. Possible to achieve generator unit stably running and smoothly adjusting on both load and no load condition 9. Online parameter modify, insuring that data would not lost when power fail 10. DVR-2000B excitation system can be connected to the power plant DCS system by SCI or Internet. So that to achieve real time data transferring to host computer and receiving host computer instruction 11. Generator operating on Constant Power factor 12. Generator operating on Constant reactive power 1.



3.1.2 Limit and protect 1.



PT(Potential Transformer) wire-broken protect, estimate wire-broken by comparing two groups of PTs or different phases of one PT. manual switching when excitation wire-broken or sending signal when instrument wire-broken 2. V/Hz protect，implement step limit and protect V/Hz, for protecting over-magnetic flux of generator and main transformer 3. Over-excitation limit and protect, implement step over-excitation limit and protect for generator rotor 4. Under-excitation limit and protect 5. Over-voltage protect when no load 6. Trigger pulse lost detection 7. Communication failure detection 8. Thyristor fault detection 9. Power supply detection, monitoring if CPU power and 24V operation power are normally working. 10. Diode or fuse failure in the rotating assembly is detected. If rotating diode or rotating fuse is failure, the light emitting diode provides local indicaton ,at the sametime giving



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remote alarm by DVR-2000B. 11. Limit and protect values, protect launching or cutting are all able to be set when field-work



3.1.3 Other auxiliary function 1.



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Fault wave recording, DVR-2000B excitation regulator record data at the time between 10 sec. before and after fault. Record data include generator voltage UG1，UG2, auto setting value UGREF，manual setting value IFREF, trigger angle ARF, active power P, reactive power Q, rotor voltage Ufd, field current Ifd, generator frequency F0, local cabinet output current ILA, other cabinet output current ILB. Almost all the analog variables are included. Fault waveform can display on the LCD of the Controller, which also can transfer to notebook by SCI, displayed, managed and printed using EMS v1.0 Test wave recording, DVR-2000B excitation regulator is able to record test waveforms by manual startup, such as 10% step response, de-excitation, cutting load, etc. Recording time is between 1 second before test start and 19 seconds after test start, Record data are the same as fault wave recording. Display mode is the same as fault wave recording Fault recording, which is able to record 20 fault acting value, breakdown time (millisecond precision) and fault type by the rule of FIFO, all the massage can be display on LCD or host computer. Event recording, by the rule of FIFO , which is able to record 20 fault acting value, fault time(millisecond precision) , such as turning on or off magnetic blow-out switch , launching or cutting channels, changing operation mode. Strong communication function, DVR-2000B uses standard MODBUS protocol, which is able to communicate between channels and achieve interface between excitation regulator and DCS system or other Power plant monitor system by flexible communication mode, RS232，RS485 or CAN. Software potentiometer function, for which all analog variables management loops cancel potentiometer, Menu set software potentiometer makes debugging work easier and more flexible Strong test function，which expediently running all tests by keyboard operating on controller. Such as switch variable driving test, over-excitation limit, under- excitation limit, step response test, AC excitation machine time constant test etc, and also proceeding auto waveform record.



3.2 Summary of qualification 3.2.1 A/D input parameter A/D sample channel: 16-channel Analog variable input general view: Terminal voltage PT1: rated 105v Terminal voltage PT2: rated 105v Stator current: rated 5A (or: 1A) Exciting current of exciter: 75mv (from LEM)



3.2.2 Switching value input and output capability 5



16-channel electric isolated input; 10-channel switching value output, where 2 channels optoelectronic output, 8 channels relay output, which can be extended to 18 cannels.



3.2.3 Output parameters Trigger pulse: 6 phase double pulse for 3 phase full controlled bridge, whose width is 100us, which can trigger less than 4 groups of 3 phase full controlled bridge, and give single phase full controlled(or semi-controlled) bridge trigger pulse.



3.2.4 Network interface SCI1: SCI2: CAN bus: Communication protocol:



RS-232(isolated) RS-485(isolated) CANH,CANL（isolated） standard modbus protocol



3.2.5 Power supply parameter Working AC power supply: Working DC power supply: Auxiliary AC power supply: Supply power:



from PMG DC220V±20%，or DC110V±20% 2A station-service AC220V±15% 2A less than 400W



3.2.6 Index parameter DVR-2000B excitation regulator satisfies well of GB/T 7409.3-1997 criteria of excitation system for synchronous electrical machines technical requirement of excitation system for large and medium synchronous generators. Detailed Index parameter as following: 1. CPU type: 32-bit high-speed DSP 2. CPU speed: up to 150MHz 3. Thyristor pilot angle α resolution: 0.0048 degree per yard 4. ADC resolution: 2-14，16-channel 5. Control calculate speed: 3.3 ms 6. Voltage adjust range: 10%～130% 7. Voltage adjust precision: 50%，send signal, limit the addition of the excitation. H0>80%，change to manual operation mode and the given value set to 90%Ifdn H0setting value, lock and add excitation, send over V/Hz signal, limit the addition of excitation. b) When V/Hz>(setting value+0.05), V/Hz fault instruction lamp on, over V/Hz relay acts，excitation regulator changes to the manual mode. 1s later, if the V/Hz remains acting, this channel exits. c) When frequency >45Hz and