DTC-Vario - Digital Control System Brochure

Innovative Renewable Energy Solutionsentec Consulting & Engineeringsmall hydropower controller dtc­variointegrated control for smallhydropower plantsControl Unit (CU, top) and Power Unit (PU,bottom) are combined to build the DTC­VarioDTC­Vario: Modern layered architecture with central dataprocessingDTC­Vario is the latest control system for smallhydropower plants by entec. The integration offeatures such as synchronization and protection aswell as energy and power metering makes it the mostpowerful entec control system up to now.The requirements for a small hydropower controlsystem are manifold. The DTC­Vario control systemovercomes these requirements by using a modularapproach. Maximum flexibility is achieved by aconsistent and modular integration of new functionsinto the main software. This results in a compactdesign, a high reliability and lower system cost.The DTC­Vario control system combines turbinegoverning, electrical protection, synchronization,alarm handling, energy and power metering, datalogging, control of cooling and greasing mechanisms,control of gates, trashrack cleaners and otherperipheral systems of the hydropower plant in onesystem.The concept is based on modern informationtechnology: The control system is of the layered typeand power and control part of the system are strictlyseparated. The layers used correspond to thefollowing (see figure above): physical level, signalconversion, process, field bus and user interface.The modularity of the DTC­Vario permits easyretrofitting of control and power part which is whyseveral standard and specialized applications arepossible.DTC­Async Light: Controls one turbine with a grid­connected asynchronous generatorDTC­Vario Standard: Controls one unit (generatorand turbine) either in isolated or grid connected mode(exclusively)DTC­Vario Island: Controls one unit in isolatedmode with grid connectionDTC­Vario Multi: Controls 2­4 units either in isolatedor grid connected modeDTC­Vario Connect: Controls 2­4 units in isolatedmode with grid connectionDTC­Vario Hybrid: Controls one unit and a secondvoltage source (e.g. PV, wind)interconnected automationSeveral turbine units can be interconnected.The superior master control system allowscentralized control and monitoring. Watermanagement (how many turbine units should begenerating for an optimal efficiency) and otherdevices such as trash rack or fish pass are allcontrolled by the master unit. Up to four turbinegroups can be managed by one master.core unitThe heart of the DTC­Vario is the doubleprocessor control unit. The fast Vario processor(left) measures, monitors and processes theelectrical parameters. The module performs thesynchronisation and handles functions such aselectrical monitoring and protection as well aspower measurement. The DTC­Async Light getsby without the Vario processor for the benefit ofa cost­effective solution.The higher­level PLC processor (right) isresponsible for turbine control, plantmonitoring, alarm coordination as well as userinterface and remote control communication.More than forty different safety and redundancychecks are performed in real time and assureboth secure monitoring and reliabletroubleshooting. In case of emergency orerrors, the DTC­Vario triggers the necessaryreaction and logs detailed alarm messages withtime stamps.The DTC­Vario is prepared for the age ofdecentralized, scaleable "virtual power plants".The controller was also developed for thecombination of different energy sources – idealfor power producers who want to manage theirplant centrally and might want to extend it stepby step.The core unit with the Vario processor (left) and the PLC processor(right)Combination of 3 turbine units with one masterdtc­vario web interfaceThe DTC­Vario sets new standards using open webtechnology. This provides a cost effective possibility ofremote control via internet, public phone net or GSMnet.The control system saves all relevant operation data,alarm messages, production data and also freelyprogrammable data through the data logger. These datacan be accessed and displayed user­friendly by the WebInterface. The Web Interface only needs a personalcomputer running a standard web browser.The Web Interface can also be used locally as operatorpanel with touch screen.DTC­Vario Web Interface: Histogram shows themonthly productionDTC­Vario Web Interface: Main page of a small hydropower plant with 2 unitsactuator ta­2x and ta­3xWith its oil­hydraulic actuator TA­2x / ­3x, entecoffers a versatile and solid positioning unit whichperfectly suits the DTC­Vario. The Ta­2x / ­3x is anenergy­efficient, innovative high­tech solution with avariable speed pump. Extremely smooth, fast andprecise positioning is the result of this design.A special valve setup enables the Ta­2x / ­3x tooperate more than one lever with only one actuator:Nozzle, jet deflector and safety valveof a pelton turbineTwo positioning units and safety valveof a double regulated Kaplan turbine orof a double chamber cross­flow turbineThe Ta­2x is designed for operation with a closingweight or a closing spring. This setup makes surethat safe shutdown is always possible without theneed of any auxiliary power supply (UPS).For schemes where a closing weight is not possibledue to space or cost constraints, entec offers self­closing oil­hydraulic actuators of the type Ta­3x usinga pressure tank.The x indicates the number of cylinders of thesystem.functionsThe functions of the controller include:Fully automatic start and stop as well as manualoperation for commissioning and troubleshootingFully automatic synchronisationData acquisition: voltages, currents, power, power factor,speed, frequencyElectric protection: over and undervoltage, over andunderfrequency, power failure, loss of phase, vector shift,overcurrent, reverse power, current unbalanceMechanic protection: Monitoring of speed, bearing andwinding temperatures, redundant monitoring of criticalsensorsAutomatic restart: after noncritical alarms such as floodwater, lack of water or power failureTurbine operation: speed control, water lever control,frequency and power controlElectric control functions: cos phi and reactive powercontrol using AVR interface (only synchronous generators)Control tasks: control of guide vanes, security valves andperiphery of the schemeParallel operation and isolated operationSynchronous and asynchronous generatorsRemote control using modem, field bus or networkconnectionSMS­Alarm: Monitoring of the scheme with up to two mobilephonesMaster function: extended analysis and monitoringfunctionality, energy management programme for optimumproduction dispatchingData analysis on PCSMS­Alarm: directly on yourmobile phoneproject highlightsAnkazomiriotra, Isolated operation Madagascar 2x60 kWBruggmühle, Bischofszell, Parallel operation Switzerland 265 kWBuchholz, Gossau SG, Parallel operation Switzerland 2x70 kWCasoja, Lenzerheide, Parallel operation Switzerland 90 kWDewata, West­Java, Isolated operation Indonesia 250 kWEgga, Parallel operation Switzerland 10 kWHofersäge, Appenzell, Parallel operation Switzerland 15 kWMühlbach, Grabs, Parallel operation Switzerland 7 kWSalido Kecil, West Sumatra, Parallel operation Indonesia 2x330 kWSt. Martin, Isolated operation Switzerland 50 kWWangan Aji, Zentral Java, Parallel operation Indonesia 2x70 kWWissbach, Urnäsch, Parallel operation Switzerland 27 kWEngstlenalp, Parallel operation Switzerland 5.6 kWNam Kha l, Isolated operation (PV, Hydro, Diesel) Laos 2 kW, 12 kW, 15 kWglobal experienceHead office:Switzerlandentec ag | St. Leonhardstrasse 59 | 9000 St. Gallen | Switzerlandtel +41 71 228 10 20 | fax +41 71 228 10 30 | main@entec.ch | www.entec.chOur branch offices:Ethiopiaentec Ethiopia Representative Office | Bole Subcity, Kebele 13, Gurd SholaAddis Ababa | Ethiopia | ethiopia@entec.chIndonesiapt. entec Indonesia | Jl. Cisatu 193 | Cimbuleuit | Bandung 40142 | Indonesiatel +62 (22) 203 2128 | fax +62 (22) 203 2128 | office@entec.co.idNepalentec Nepal | P.O. Box 1457 | Pulchowk, Lalitpur, Kathmandu | Nepaltel +977 (1) 500 9065 / ­68 / ­69 | fax +977 (1) 552 1425 | info@entec.com.npVietnamRepresentative Office of entec ag in HanoiRoom 102, 18 Tran Hung Dao Street | Hanoi | Vietnamtel +84 (04) 3933 4080 / ­83 | fax +48 (04) 3933 2688 | info@entec.vnAssociate partners:SwitzerlandZÜLLIG SYSTEMS BY HACH LANGEHach Lange GmbH, Rheineck | Rorschacherstrasse 30a | 9424 Rheineck | Switzerlandtel +41 848 55 66 99 | fax +41 71 886 91 66 | info@hach­lange.ch | www.hach­lange.chThailandENVIMA (Thailand) Co., Ltd. | 1023 TPS TPS Building4th Floor, Pattanakarn Road | Suan Luang | Bangkok 10250 | Thailandtel +66 (0) 2 717 8114 | fax +66 (0) 2 717 8115 | staudtem@envima.com | www.envima.comwww.entec.ch