GER-4193A - General Electric

1 GE Power SystemsSPEEDTRONIC Mark VI Turbine Control SystemWalter BarkerMichael CroninGE Power SystemsSchenectady, NYGER-4193 AgContentsIntroduction.. 1 Architecture.. 1 Triple Redundancy.. 2I/O Interface.. 3 General purpose I/O.. 3 Application Specific I/O.. 4 Operator Interface.. 7 Software Maintenance Tools.. 8 Communications.. 8 Communication Link Options.. 10 Time Synchronization.. 10 Diagnostics.. 10 Power.. 11 Codes and Standards.. 12 Safety Standards .. 12 Printed Wire Board Assemblies .. 12CE Electromagnetic Compatibility (EMC) .. 12CE Low Voltage Directive .. 12 Environment.. 12 Temperature .. 12 Humidity .. 12 Elevation .. 13 Gas Contaminants .. 13 Dust Contaminants.

2 13 Seismic Universal Building Code (UBC).. 13 Documentation.. 13 Manuals .. 13 Drawings .. 13 List of Figures.. 14 List of Tables.. 14 SPEEDTRONIC Mark VI Turbine Control SystemGE Power Systems GER-4193A (10/00)iSPEEDTRONIC Mark VI Turbine Control SystemGE Power Systems GER-4193A (10/00)iiIntroductionThe SPEEDTRONIC Mark VI turbine controlis the current state-of-the-art control for GE tur-bines that have a heritage of more than 30 yearsof successful operation. It is designed as a com-plete integrated control, protection, and moni-toring system for generator and mechanicaldrive applications of gas and steam turbines. It isalso an ideal platform for integrating all powerisland and balance-of-plant controls.

3 Hardwareand software are designed with close coordina-tion between GE s turbine design engineeringand controls engineering to insure that your con-trol system provides the optimum turbine per-formance and you receive a true system solu-tion. With Mark VI, you receive the benefits ofGE s unmatched experience with an advancedturbine control platform. (See Figure 1.)ArchitectureThe heart of the control system is the ControlModule, which is available in either a 13- or 21-slot standard VME card rack. Inputs arereceived by the Control Module through termi-nation boards with either barrier or box-typeterminal blocks and passive signal I/O card contains a TMS320C32 DSPprocessor to digitally filter the data before con-version to 32 bit IEEE-854 floating point data is then placed in dual port memorythat is accessible by the on-board C32 DSP onone side and the VME bus on the addition to the I/O cards, the ControlModule contains an internal communicationcard, a main processor card, and sometimes aflash disk card.

4 Each card takes one slot exceptfor the main processor that takes two are manufactured with surface-mountedtechnology and conformal coated per data is transmitted on the VME backplanebetween the I/O cards and the VCMI cardlocated in slot 1. The VCMI is used for inter-nal communications between: I/O cards that are contained within itscard rack I/O cards that may be contained inexpansion I/O racks called InterfaceModules I/O in backup <P> ProtectionModules I/O in other Control Modules used intriple redundant controlconfigurations The main processor cardThe main processor card executes the bulk ofthe application software at 10, 20, or 40 msdepending on the requirements of the applica-tion.

5 Since most applications require that spe-SPEEDTRONIC Mark VI Turbine Control SystemGE Power Systems GER-4193A (10/00)1 Figure of Speedtronic Mark VI Over 30 years experience Complete control, protection, andmonitoring Can be used in variety of applications Designed by GE turbine and controlsengineeringcific parts of the control run at faster rates ( loops, pyrometers, etc.), the distributedprocessor system between the main processorand the dedicated I/O processors is very impor-tant for optimum system performance. A QNXoperating system is used for real-time applica-tions with multi-tasking, priority-driven preemp-tive scheduling, and fast-context of data between the ControlModule and other modules within the Mark VIcontrol system is performed on IONet.

6 TheVCMI card in the Control Module is the IONetbus master communicating on an Ethernet10 Base2 network to slave stations. A unique pol-ing type protocol (Asynchronous DrivesLanguage) is used to make the IONet moredeterministic than traditional Ethernet optional Genius Bus interface can be pro-vided on the main processor card in Mark VISimplex controls for communication with theGE Fanuc family of remote I/O blocks. Theseblocks can be selected with the same softwareconfiguration tools that select Mark VI I/Ocards, and the data is resident in the same Control Module is used for control, pro-tection, and monitoring functions, but someapplications require backup protection.

7 Forexample, backup emergency overspeed protec-tion is always provided for turbines that do nothave a mechanical overspeed bolt, and backupsynch check protection is commonly providedfor generator drives. In these applications, theIONet is extended to a Backup ProtectionModule that is available in Simplex and tripleredundant forms. The triple redundant versioncontains three independent sections (powersupply, processor, I/O) that can be replacedwhile the turbine is running. IONet is used toaccess diagnostic data or for cross-trippingbetween the Control Module and theProtection Module, but it is not required RedundancyMark VI control systems are available inSimplex and Triple Redundant forms for smallapplications and large integrated systems withcontrol ranging from a single module to manydistributed modules.

8 The name Triple ModuleRedundant (TMR) is derived from the basicarchitecture with three completely separate andindependent Control Modules, power supplies,and IONets. Mark VI is the third generation oftriple redundant control systems that were pio-neered by GE in 1983. System throughputenables operation of up to nine, 21-slot VMEracks of I/O cards at 40 ms including voting thedata. Inputs are voted in software in a schemecalled Software Implemented Fault Tolerance(SIFT). The VCMI card in each ControlModule receives inputs from the ControlModule back-plane and other modules via itsown from the VCMI cards in each of the threeControl Modules is then exchanged and votedprior to transmitting the data to the mainprocessor cards for execution of the applicationsoftware.

9 Output voting is extended to the tur-bine with three coil servos for control valves and2 out of 3 relays for critical outputs such ashydraulic trip solenoids. Other forms of outputvoting are available, including a median selectof 4-20ma outputs for process control and 0-200ma outputs for interface for TMR controls can be eithersingle, dual, triple redundant, or combinationsof redundancy levels. The TMR architecturesupports riding through a single point failure inthe electronics and repair of the defective cardor module while the process is running. Addingsensor redundancy increases the fault toleranceSPEEDTRONIC Mark VI Turbine Control SystemGE Power Systems GER-4193A (10/00)2of the overall system.

10 Another TMR feature isthe ability to distinguish between field sensorfaults and internal electronics continuously monitor the 3 sets ofinput electronics and alarms any discrepanciesbetween them as an internal fault versus a sen-sor fault. In addition, all three main processorscontinue to execute the correct voted inputdata. (See Figure 2.)I/O InterfaceThere are two types of termination boards. Onetype has two 24-point, barrier-type terminalblocks that can be unplugged for field mainte-nance. These are available for Simplex andTMR controls. They can accept two mm2(#12 AWG) wires with 300 volt type of termination board used onSimplex controls is mounted on a DIN rail andhas one, fixed, box-type terminal block.