Substation Automation System (SAS)

We have been providing world-class automation software solutions and services to our customers around the world for over 35 years.

We specialize in delivering innovative, reliable and cost effective solutions that connect people in our range of business and industry for real-time information in a way that the business strategies and decisions to improve.

Current integration with our parent company and the global energy management specialist Schneider Electric brings together more than 200 years of collective automation and control management expertise.

Research and development has long been the focus of our activity. Additional support and expertise of the Schneider Electric enables us to expand this focus and deliver world-class portfolio expansion and cost-Automation and Control Solutions for our customers.

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Background, Chronology of Data, Applications & Limitations Modbus Protocol

Modbus is a serial communications protocol published by Modicon in 1979 to be applied to the programmable logic controller (PLC). Then the protocol has become the de facto standard communications protocol in industry, and now Modbus is a two-way communication protocol most commonly used as a media liaison with the industry or other electronic media with the computer. The main reason is the extensive use of Modbus as the communications protocol is:
  

• Modbus protocol was published as an open and royalty-free 
• Modbus is relatively easy to combine with industrial networks 
• Modbus data transfer "raw bits" or "words" without limiting the type of vendor brand or type of industrial equipment manufacturers that use

Modbus allows for communication between the two-lane devices connected to the same network, for example, a system that measures temperature and humidity and communicates the results to a computer (HMI). Modbus is often used to connect to the remote computer sopervisory terminal unit (RTU) supervisory control and data acquisition system (SCADA).

Manufacturer or supplier of large and small, system integrators, end-user, open source developers, lecturers and other interested parties can become members of Modbus. Several prominent members are SoftDEL Systems, Precision Digital Corporation, Motor Protection Electronics, FieldServer Technologies and many more.

Version of the Protocol

Communication using Modbus protocol can be through the medium of the serial port (RS-232, RS-485, FO), can also be via Ethernet (LAN) and other tissues that support the Internet protocols.

Most Modbus devices communicate over a serial EIA-485 physical layer, usually the manufacturer of compact type sensor and tranducer using this because it is much more simple and low-cost. There are many variants of the Modbus protocol

• Modbus RTU - used in serial communication and use the binary representation of data values ​​that are compressed as the communication protocol. RTU format follows the request command / data transfer with a cyclic redundancy check checksum error checking mechanism (error-checking) to ensure data reliability. Modbus RTU is the most common implementation of all existing versions of Modbus. A Modbus RTU message should be transmitted continuously with no pause between characters. Each Modbus message framing or separated by periods of idle time (without communication or communication port is closed or OFF). Communication via Modbus RTU is often used in small-scale monitoring system where sensors and HMI computers located not very far.
• Modbus ASCII - Modbus protocol is used on the type of serial communication and the use of ASCII characters in a single communication protocol. ASCII data format uses a longitudinal redundancy check checksum check for errors in data transfer. Data on Modbus ASCII messages framed by a colon or a colon (':') in advance and followed by a newline (CR / LF). Communication between electronic devices to a computer via Modbus ASCII protocol is commonly used in telephone network or GSM Modem is not available if an adequate infrastructure network such as LAN or Fiber-Optic network there.
• Modbus TCP / IP or Modbus TCP - Modbus protocol variant can only be used for communication over TCP / IP or commonly known as a LAN. Modbus TCP / IP does not require a checksum calculation on the last layer to handle errors such as data transfer on serial communication. Modbus TCP / IP is faster in transferring data than the Modbus RTU Modbus ASCII especially. On the application of SCADA or Automation system is complex IED devices which are used in large numbers and diverse, or where the level of the dense traffic of data transfer, I would recommend using Modbus TCP / IP to achieve real-time rates are higher. Of course the IED with the Port TCP / IP itself is relatively more expensive than the RS-485 port.
• Modbus over TCP / IP or Modbus over TCP - This is a different variant of the Modbus Modbus TCP checksum which is used or the calculation of data transfer errors (error-checking) are included in the payload such as Modbus RTU.
• Modbus Plus (Modbus + or MB +) - Modbus Plus (Modbus + or MB +) also exists and is a version of the extension of all Modbus versions, but only exclusive for SCHNEIDER ELECTRIC alone. Modbus requires special co-processors to handle the rapid rotation of the token as HDLC. Modbus type uses twisted pair cable at a speed of 1 Mbit / s and includes transformer isolation at each node. Special interface is required as a liaison Modbus Plus to a computer, typically using a ISA card (SA85), PCI or PCMCIA bus is specially made for the MB +.

Modeling of data and function requests data on the four variants of Modbus over other than MB + is essentially identical, only the encapsulation or fromat frame / frames are different.

Communication and Devices

Any device that wants to communicate via Modbus protocol should be given a unique address or address should not be the same as other devices. In serial communications, and network node only MB + is assigned as the Master who can initiate a command, unlike the case with Ethernet, any device can send Modbus command, although usually only one master device to do so.

Modbus command contains the Modbus address of the device that you want to go or who want to be asked to communicate .. Only the intended device will act on the orders, although other devices may also receive a message / command (the exception is a special broadcastable command is sent to node 0 acting but not recognized). All Modbus commands contain checking the information, to ensure that orders are coming not damaged or error. The basic Modbus commands can instruct an RTU to change the value of a control register or reading a port Input / Output, and simultaneously instruct the device to send back one or more values ​​contained in the register that is accessed or changed.

There are many modems and gateways are supported by Modbus, Modbus is a protocol because it is a very simple and often copied by manufacturers of electronic devices and networks. Some of them, there are specially made ​​devices designed for this protocol. Different implementations use wires, wireless communication and even SMS or GPRS. Classic problem of the monitoring system designers with a wireless network / wireless, SMS and GPRS is that they make the system must be able to include high latency and troubleshooting time.

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Automated IR-Cam for Electric Substation Monitoring

Electric power utilities will generally experience a problem with the age of the equipment and all the infrastructure, of course, this will lead to increased risk of blackouts (outages total) and brownouts (appliances burning or exploding), unexpected costs will increase dramatically for the repair / maintenance, number of security problems to a location away from the scrutiny, and will certainly lead to huge cost overruns.

 As one part of an initiative to improve public services, electricity industry is always looking for a way out of these problems which of course will support efforts to increase the reliability and quality of electrical power supply but still can save the cost of an abundant discharge.

We also try to participate in this effort by working with several business partners, manufacturers and the distribution in order to improve monitoring systems in electrical substations.

Through the use of an Infrared Camera "smart" we are trying to improve intelligence (artificial intelligent) and analysis of the more intelligent automation software to meet the electricity needs of an increasingly complex industry. Failure of equipment that will happen someday and security problems of a site would be easily detectable at any time, day or night, even though the location of any remote monitoring. The result will be found an increased reliability and reduced costs that are not supposed to.

Early warning against a wide range of problems in the substation:
 

• Remote monitoring of vital and critical component in an electrical substation. 
• Can help improve performance and reliability without adding personnel ThermoVision.
• Monitoring can be done from the central control room and can be integrated easily with Substation Automation System via Ethernet (TCP / IP) and nirkable connection (wireless). 
• ThermoVision images can be viewed directly through a computer monitor (LIVE) substation automation or with a separate server module. 
• Get temperature readings quickly and accurately from the excess heat from the equipment (overheating) and is expected to burn within a certain time. 
• Able to observe the equipment was not working anymore (damaged) by appointment at a much lower temperature than other equipment. 
• Able to produce audio-visual alarm from either internal or via software Substation Automation. 
• Can send reports via email and automatic notification to management intranet connection for faster action. Or you can also SMS-Alert method-Dial Phone, or to related parties if the infrastructure is still inadequate. 
• Work in any condition, on the day or night, whether hot or too wet and can operate for 24/7.

Typical System Configuration

Automation system this time deliberately designed specifically for circuit monitoring equipment in substations and critical enough with age that can be burned at any time. Methods and models thermovisi depiction taken from the IR camera can follow the standards and the needs of end-user. Automation system we designed is an open architecture that can be developed into a wide range of models and sustainable development for the best reliability of a system.

Melalui .Net Framework, pengembangan ke dalam intelligent automation system jauh lebih mudah dan tak terbatas dibandingkan dengan yang lainnya, vista & win 7 support plus tampilan gambar 64bit (HD), web-application, dll. Dan tentu saja “Free-License”, sehingga anda dapat menggunakan investasi ini selamanya tanpa batasan waktu. Karena kami menyadari license key terkadang malah seringkali menyebabkan error dan cenderung membingungkan end-user.

Kami tidak hanya merancang aplikasi automation untuk substation saja, namun bisa juga untuk beragam aplikasi pemantauan lokasi kritis lainnya seperti: Oil & Gas, Power Generation, Hi-Risk Building, dll. Untuk saat ini, kamera IR yang compatible dengan intelligent automation system yang kami desain adalah FLIR A-Series.

 

With the addition of an integrated controller with IR camera housing to adjust the viewing angle and the slope of the IR camera will facilitate monitoring of the substation site. Intelligent Automation System can control and the intelligent controller is able to perform site-automatic patrol, monitoring equipment and temperature monitoring site security without human supervision.

The images obtained will be sent via Ethernet, wireless or fiber optic. Intelligent Automation System can also be programmed to automatically generate periodic reports as required and end-user format to ensure system reliability.

Automated Substation Monitoring Systems

Here are some of the substation components that can be monitored remotely where equipment failure can be identified by thermal and equipment can be monitored in see-through:

• Power Transformer / Power transformers (transformer oil level and pump operation) 
• Load tap changers (level of oil and other internal problems) 
• Insulator bushings (oil level and the detection of faulty connection or poor) 
• Standoff insulators (moisture, contamination, and degradation) 
• Lightning / Surge arrestors (degradation in metal-oxide disk) 
• Circuit breakers / PMT (leakage of oil or SF6) 
• Mechanical disconnects: DS, ES, etc. (poor connection or damaged, contamination) 
• Control cabinets (kerusakanyang caused by the fan, pumps and other components) 
• Battery

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