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Gas Turbine Performance Analyze System Version 1.19 Was Released On November 20,2008 ! 1.1 System Architecture
This is a service oriented architecture, features include:
1.2 System Functionalities, See The Comments On The Screenshots
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Gas Turbine Historical Data Recording System Version 3.88 released on November 20,2008 !
Introduction This product is running at Shanghai ZhaDian Gas Turbine Power Plant. It assembles real-time data from 4X100 MW GE Mark V Gas turbine controllers. The old Historian device from GE was a VAX workstation with tape recorder as storage, it was broken, since both DEC and Compaq disappeared from market, and GE doesn't sale VAX anymore, this kind of legacy system must be obsolete. The new Historian system from Leiosoft is consisted of two programs: Communicator which is for communication, and Historian which is for system configuration and data query. This product supports Ethernet MODBUS communication with GE HMI server, and direct serial port MODBUS communication with MARKV. In Ethernet mode, the collect rate is 60 MS, in serial port mode, the rate is 178 MS. 1.1 System diagram 1.1.1 Ethernet Communication Mode
There are three Ethernet networks in ZhaDian Power Plant. Leiosoft Communicator collects data from two GE HMI servers. The protocol is GE MODBUS over Ethernet. Since there is no timestamp in MODBUS protocol, to keep the accuracy of time, a GPS clock synchronizer is used. 1.1.2 Direct Serial Port Communication Mode
This is the system diagram before ZhaDian Power Plant switch to use GE HMI. The historian workstation communicates to 4 GE Mark V Controller interfaces via a MOXA serial port card. The protocol is the standard MODBUS protocol. Mixed communication mode that use Ethernet mode for some of the turbine units and use serial port mode for the other turbine units simultaneously is supported. 1.2 Functionality
1.3 Features 1.3.1 High accuracy and Real time Because there are a large number of sample points in Mark V system, and there is no timestamp in MODBUS protocol, the key elements to make a good historian system include accuracy, real time speed and reliability. To acquire these performance, we applied three key techniques: [Real time database] The system uses an embedded real-time database as the kernel of process, the database residents in memory and supports SQL. When any of the communication thread receives data, it just save the data to the memory database, then return and send command again. There is an independent working thread which will periodically transmit these data from the memory database to the disk database. Thus the time consuming disk operation will never delay those serial port communication. [User can specify the sample frequency] The Modbus protocol is a kind of polling protocol, we take use of this feature to classify the importance of all the sample points into two level, and use different polling frequency to assemble those data points. User can specify the importance level of a sample point. [Multi-thread communication] When communicate to the 4 Mark V system, every serial port is served by a independent thread. In this way we acquire data concurrently.In ZhaDian project, by classifying the sample points into two different sample frequency levels, our system acquires and saves 1525 sample points in 60 ms (Ethernet mode) / 178ms (serial port mode). The another usage of this system is that user can use it as a high speed recording tool to solve a turbine problem, when the number of collected signals is less than 50, this system can make one record every 10 ms, even one record every millisecond if the the number of collected signals is less than 20. [Linux Software RAID] By using Linux Software RAID mode 0, we can combine 8 300GB disks into a 2400GB big storage, which can save at least 4 years data of 6 units. The disk input/output speed are greatly improved at the same time. 1.3.2 Open system This is an open system, include: [Software]
[Hardware] The system use standard industrial rack PC as the host, use high capacity hard disk as the storage, none of the parts is constraint to a specified manufacturer, so user will never face a situation, like when DEC/VAX disappeared they can not buy parts for his computer, again. The open software and hardware architecture make this system highly extensible, if a new turbine need to be recorded, all of the job which our user need to do is to add a new network card or serial port to it. 1.3.3 Theme able User Interface From Version 2.00, this product use the GTK+ 2.6 library ( http://www.gtk.org ) as the base of graphic user interface. Thanks to the great and beautiful library, now we can
1.4 System components [The main hardware components]
[The main software components]
[The main modules include]
1.5 Some materials of the older 1.x versions Version 1.6 User Manual (zipped HTML)
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Power Station SCADA system
Screenshots and detailed introduce Introduction This product originally is designed to be used as the SCADA system for a feed line automation network, to control 18 10KV power stations with about 200 Schneider Talus 200 I FTUs ( Feed line Terminal Unit) in southwestern of Shanghai, China. The whole system is consist of three program, one to be used for drawing and configurations, one to be used as the communication gateway, and one to be used as supervisory workstations. Features
Install Requirements
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Leiosoft Video Capture V2.0 Screenshots and detailed introduce Introduction Leiosoft Video Capture (LVC) is a digital video capture software, you can use it as a security surveillance tool, to make AVI format digital film, or just use it to make digital photo image. Features
Install requirements
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