Keywords: Distributed Controlled System (DCS), Hardware, Visual Basic Software, Power Distribution.

Transcription

1 ISSN Vol.03,Issue.10 May-2014, Pages: Networking between Server and for DCS based Power Distribution using C#.Net Programming YIN YIN WINN 1, ZAW MIN NAING 2, Hla Myo Tun 3, SU SU YI MON 4 1 Dept of Electronic, Mandalay Technological University, Mandalay, Myanmar, yyinyin25@gmail.com. 2 Dept of Electronic, Maubin Technological University, Maubin, Yangon, drzaw290615@gmail.com. 3 Dept of Electronic, Mandalay Technological University, Mandalay, Myanmar, kohlamyotun@gamil.com. 4 Dept of Electronic, Mandalay Technological University, Mandalay, Myanmar, ssyimonn@gamil.com. Abstract: The purpose of this research is to monitor and control the power distribution from 300KVA main transformer to all departments in the university campus. DCS (Distributed Control System) provides this control and monitoring for industrial automation. The DCS is also widely used for modern power system and it is more popular than any other control systems in the modern industrial processes. The research has constructed hardware and tested to communicate between client and server. All hardware and software components have been developed and integrated together. In this system, microcontroller is used instead of Remote Terminal Unit (RTU) for power distribution. The client-server model is used for this system as the datagram client program and datagram server program have been created by C#.Net programming. USB cable is used as a connector between and PC. Keywords: Distributed Controlled System (DCS), Hardware, Visual Basic Software, Power Distribution. I. INTRODUCTION Power distribution DCS is a computer based production process control and monitoring system. It uses the data acquisition module to monitor and control the operation of field devices so as to achieve data acquisition, device control. The power distribution DCS system has many advantages, such as information integrity, efficiency, correct grasp of system running status, speeding up decision-making, and can help quickly detect the failure state of the system. It has become an essential tool for power dispatching. For power control and monitoring, many wire and wireless technologies are discussed. These are GSM, zig-bee, SCADA, DCS and Microcontroller. In [2], [3] and [4], power monitoring module calculates power consumption for home appliances. Zig-Bee communication module is used to send measured data of current and voltage to server module and store it in computer. Authors design the GUI by using Visual Basic (VB) to provide user friendly environment. The main aim of this paper is to design and construct a low cost controlling wired system between server and clients for power distribution in university campus using microcontroller. The main aim of this paper is to communicate between client and server for power distribution by using C#.Net Programming language. It is a low cost controlling wired system between server and clients for power distribution in university campus using microcontroller. By using DCS, the distribution system is made more secure, reliable and efficient because it is widely used for modern power system and more popular than any other control system. II. DISTRIBUTED CONTROL SYSTEM (DCS) DCS refers to a control system that available in manufacturing system, process or any kind of dynamic system, in which the controller elements are not central in location (like the brain) but are distributed throughout the system with each component sub-system controlled by one or more controllers. The entire systems of controllers are Fig.1. Distributed Control System SEMAR GROUPS TECHNICAL SOCIETY. All rights reserved.

2 connected by networks for communication and monitoring. DCS is a very broad term used in a variety of industries, to monitor and control distributed equipment. DCS is connected to sensors and actuators to control the flow of materials through the plant [6]. The architecture of the DCS is depicted in Fig. 1. A.DCS Based Power Distribution System The system architecture of the power distribution monitoring system can be divided into three portions, namely system monitoring, communication, and field device. The overall block diagram of the system is shown in Fig. 2 and simple block of DCS based power distribution process is depicted in Fig. 3. In this system, 300 KVA main transformer is used to distribute electric power to all departments in university campus. This distribution system can be accomplished by using Distributed Control System (DCS). DCS includes master station including server and clients. In this system, the power threshold will be predefined between 180 and 230 V by the microcontroller. These voltage parameters are recorded at the server computer using a data acquisition device called Remote Terminal Unit (RTU) or Microcontroller. Input Server Rj45 Cut off s s 18F45 50 Fig.2. Overall block diagram of the system. YIN YIN WINN, ZAW MIN NAING, Hla Myo Tun, SU SU YI MON Sensor Signal Conditioning Circuit will communicate with load to control them. captures the voltage that is used for loading in each department. The stored voltage is transmitted using USB cable from to client. Then server computer may know the condition of voltage that is distributed electric power to all departments form the client computer because the Ethernet switch is communicated among and clients and server. Based on the received information, controlling operation is performed. If the receiver receives the parameter which is greater than the fixed threshold voltage, then server commands to respective client to cut off power distribution. III. POWER USAGE IN UNIVERSITY CAMPUS Electric energy enters the university with 11KV transmission line from the substation which is stepped down to 400 V by using 300KVA transformer. In this system, the three-phase, 4-wires transformer is used for power distribution to all departments in university campus. This transformer is distributed with the three lines 1, 2, 3 to all departments in university campus. To balance the load, the three lines must be shared equally. In distribution system, it is important to balance the load. As the load is not a constant one it is always an unpredictable thing. If the load is unbalanced, the fuse that is installed at the outgoing side of the transformer must be cut off. The load power is the product of KVA and power factor (0.85). The lines that are used for all departments are illustrated in Table1 and load data sheet of the power consumption for all departments is shown in Table 1. TABLE I: THREE PHASE, FOUR WIRES TRANSFORMER Workshop Department 300KVA main Line 1 Line 2 Line 3 TABLE II: LOAD DATASHEET OF POWER CONSUMPTION FOR ALL DEPARTMENTS AT MTU Server Civil Department ETHERNET SWITCH Mechanical Department Fig.3. Simple block diagram of DCS based power distribution system. Volume.03, IssueNo.10, May-2014, Pages:

3 Networking between Server and for DCS based Power Distribution using C#.Net Programming of signals generated from microcontroller. The relay circuit replaces the manual switches of power distribution with computerized switching, such that the enable signal from can handle a (230) V High Voltage. The output allows command for switching ON or OFF each relay. The complete circuit diagram and photo of compete circuit are shown in Fig.7 and 8. 6V Fig.4. Pie Chart for power consumption of each department. A. Software Implementation The system, based on Windows platform, performed successfully in transmitting data between the computer and the microcontroller. C#.Net programming language is utilized to link between client and server computer. The GUI, based on Windows platform, provides the use of the USB computer port to the system. Most computers today are developed with Universal Serial Bus (USB) for connection with peripheral devices. One of the popular programs to support the USB communication port of a computer is the programming provided by GUI. Microsoft s visual basic and C#.Net have been the most popular choice for basic programmers developing window programs. It can be added the Input and Output to the language in a dynamic linked library (DLL). A DLL contains code that any windows program can access, including the program written in visual basic [7]. 1 +5V 2 USB 3 4 GND with USB and I/O ports 33pf 20 MHz 33pf GND GND AN0 AN1 AN2 AN3 AN4 AN5 10 k Vcc Vcc L K 33 RB RB1 35 RB2 36 RB3 37 RB4 38 RB5 39 RB6 RB R 20 R 21 R R 28 RD5 29 RD6 30 RD VUSB VSS VSS RC µf 16F4550 LED s Circuit Line 1 Line 2 Line 3 Fig.7. Overall Circuit Diagram of Power Distribution System for a department. IV. HARDWARE IMPLEMENTATION OF POWER DISTRIBUTION PROCESS After collecting all design related information which is necessary for power distribution, the next step is to construct the perfect and compatible H/W components to control power distribution. The development has been used for programming through USB cable, also the development microcontroller will be used as interfacing tool to connect the with the inputs and outputs signals of process and to connect the with the PC which contains a GUI through (USB) cable. The deals with TTL level voltage (0-5) VDC, the (0) VDC represents logic (0) and the (5) VDC represents logic (1) to. Thus the input voltage which has a voltage value more than (6) VDC that might burn the, hence each input signal to from computer is rated on (5) VDC using USB cable. The output relay circuit is connected to provide signals from to load. The relay is one of devices used in this proposed design in order to ensure a flexible connection between and the load. It s switched ON or OFF according to the level Fig.8. Photo of Complete circuit for power distribution process. V. NETWORKING BETWEEN SERVER AND CLIENT WITH C#.NET PROGRAMMING This system includes the transfer of data between server and clients. The voltages that are distributed for load in each Volume.03, IssueNo.10, May-2014, Pages:

4 department are predefined between 180V and 220 V by the microcontroller. The following Figures are the networking between client and server. If the voltage parameters are between 180 and, server responses to client the condition of voltage parameter, normal condition. And then, it will send to client to go on power distribution. If the voltage level is over 230, server responses to client under load condition and need to break down. When the voltage level is under 180 V, server send to client overload condition and it will reply to breakdown power distribution. YIN YIN WINN, ZAW MIN NAING, Hla Myo Tun, SU SU YI MON Fig.12. Simulation Result of client for under load Condition (250V). Fig.9: Simulation Result of Server for Normal Condition (180V). Fig.13. Simulation Result of Server for Overload Condition (110V). Fig.10. Simulation Result of for Normal Condition (180V). Fig.14: Simulation Result of client for overload Condition (110V). Fig.11. Simulation Result of Server for under load Condition (250V). Fig.15. Networking between Server and. Volume.03, IssueNo.10, May-2014, Pages:

5 Networking between Server and for DCS based Power Distribution using C#.Net Programming VI. CONCLUSION This system is a development of DCS based electric power distribution for the monitoring and control of significant parameter (Voltage). In this research, design and implementation of the power distribution process for the monitoring and control of DCS system have been studied. Communication system uses USB cable and hardware units for this process is designed and constructed and tested by connecting both hardware and software. network cable is utilized between client and server. Networking between client and server is tested using C#.Net programming language. Its flexibility in programming allows for easy future modification and implementations. The use of DCS for the monitoring and controller of electric distribution system has been identified as one of the major way to provide efficient and reliable electric power to electricity consumers. VII. REFERENCES [1] A. Adejumobi, Development of Microcontroller based Electric Power Distribution Automation System, March, [2] David L. Brown, James W. Skeen, Parkash Daryani, Farrokh A Rahimi, Prospects for Distribution Automation at Pacific Gas & Electric Company, IEEE Transactions on Power Delivery, Vol. 6, No. 4, October 1991, pp [3] Kim, W.H. and Lee, S. and Hwang, J., Real-time Energy Monitoring and Controlling System based on ZigBee Sensor Networks, Elsevier Procedia Computer Science (PCS), [4] Cheng, J.Y. and Hung, M.H. and Chang, J.W., A zigbeebased power monitoring system with direct load control capabilities, IEEE International Networking, Sensing and Control (INSC), [5] Hla Myo Tun, 2008, Distributed Control System for Vehicle Spare Parts Manufacturing Plant (Real Time Graphical User Interface Monitoring and Network System), Ph.D Thesis, Mandalay Technological University, Mandalaly, Myanmar. [6] Development of Distributed Control System using servo driven position control plant. [7] MSDN, Library and Documentation for Microsoft Visio Studio. Volume.03, IssueNo.10, May-2014, Pages: