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- February 15, 2016February 15, 2016
Data may be exchanged between the RTDS Simulator and the external equipment over a LAN/WAN using the GTNET−SKT (SocKeT) Protocol. The SKT protocol is provided as a means to communicate with the RTDS using TCP or UDP sockets. The remote equipment may be dedicated hardware, a computer workstation or even another GTNET−SKT module running on another GTNETx2 card.
The SKT protocol represents both integer and floating point numbers as 4−bytes in the packet. Floating point numbers are single precision (32 bit) and are represented using IEEE754 format. The number of points and type of each point (int or float) are defined in the SKT component in RSCAD/Draft. Data points are stored in big endian format. The maximum size for a packet corresponds to 300 data points or 1200 bytes.
It is recommended that for GTNETx2 card the update rate be limited to 1000Hz for 300 points, or 5000Hz for less than 60 points. For GTNET card, it is recommended that the update rate be limited to 100Hz for any number of points.
- February 8, 2016February 8, 2016
61850 MMS Voyageur is available in RSCAD as a stand alone program and is used for IEC 61850 client server MMS compliant data communication between the client software installed as part of RSCAD and external devices such as Intelligent Electronic Devices (IEDs).
Clients typically provide all of the functionality needed for every 61850 service and can be configured through self-description or via a SCL file. The abstract data models defined in IEC 61850 can be mapped to any number of protocols. One of the mappings in the standard are to the well known Manufacturing Message Specification (MMS). MMS specifies a standard communications mechanism for devices and computer applications so as to achieve a high level of interoperability. Clients typically can Read, Write, Create Data Sets, Delete Data Sets, Set/Remove Data Sets in Control Blocks, Enable/Disable Control Blocks, Poll Data, Control, Reports, Logs, and File Services. Data Set creation can be Persistent- in LN context or Non-Persistent in association context. Reports and Logs are referenced to Data-Sets and have trigger options (TrgOps) and have optional fields that are all contained in the SCL file.
61850 MMS Voyageur is used to test server implementations while using the RTDS. All typical communication procedures performed by a SCADA system or other testing system can be achieved using the 61850 MMS Voyageur. The 61850 MMS Voyageur can also be used with Runtime Scripts to help automate and enhance testing of the IED.
- February 1, 2016February 1, 2016
The FileManager module is the first module to appear when the RTDS software is started. FileManager provides a facility to organize files and other RSCAD modules. The following are some FileManager tips and tricks.
1. When a case is compiled, it creates a number of new files. The FileManager module needs to be refreshed to see them. This can be done by clicking View -> Refresh Directory Listings or by hitting F5 on the keyboard.
2. The Tutorial folder includes example cases for the different tutorial manuals (RTDS Tutorial, Component Builder Tutorial and Small Time-Step Tutorial) as well as many helpful sample cases found in the SAMPLES folder.
3. All of the files in a certain case can be zipped together in a folder through the FileManager. By right clicking on a draft file (.dft) there is the option to Zip Files.
A new window pops up which allows the user to select which files should be included in the zipped file. Along with the case files, there is also the option to included files such as the hardware configuration file (config_file_02.txt) and the hub configuration file (hubConfig). The user can then click Zip Selected, and a .zip file will be created including the files they have selected.
- January 25, 2016January 25, 2016
There is a limited number of nodes a subsystem can have. With PB5 processor cards it is 72 single phase nodes, and with the Fiber Enhanced Backplane (FEB) that can be increased to 90 single phase nodes. Every time a 3-phase breaker component is added to the subsystem it introduces 3 nodes. There are components within RSCAD that have the option to include embedded breakers. This eliminates the additional 3 nodes that are normally added when including a breaker.
The 3-phase, 2-winding transformer has the option to enable the embedded breaker on one, or both sides of the transformer. When an embedded breaker is included, a new tab called “Breaker Data” is created which allows the user to enter the breaker open and close resistance, the name of the breaker control word, and which bit of the control word is controlling which phases of the breaker.
Each side of a transmission line has the option to include an embedded breaker. There is also the option to include a line reactor. The “Breaker and Line Reactor Data” tab is created when the breaker is included. There are also 2 other tabs that are added that allow the user to monitor the voltage between the end of the transmission line and the breaker.
- January 18, 2016January 18, 2016
Previously when editing a common parameter of multiple components, the components had to be grouped together. There have been a few changes to this feature.
When right clicking on a single component and selecting Edit->Common the following box will appear:
The parameter name needs to be entered (which can be found in the left column when editing a component) and the new value of the parameter needs to be entered as well. There are 3 options of which components with the common parameter will be changed:
- The component that is selected
- All components in the current subsystem
- All of the components in all of the subsystems
When editing a common parameter of a group of components, the box looks almost the same, except there is the “Selected Group” option, instead of the “Selected Component” option.
When inside a hierarchy box there is a fourth option included which is “This Box”. If this is selected, all components inside that hierarchy box with the common parameter will change to the new value.