International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 04 | Apr -2017
p-ISSN: 2395-0072
www.irjet.net
POWER LINE CARRIER COMMUNICATION BASED LOAD SCHEDULING Aravind Chitharanjan1, Sarath C M2, Dheeraj E M3 , Ninu Joy4 1,2,3Student
,Dept. Electrical and Electronics, Mar Athanasius College Of Engineering , Kerala ,India professor, Dept. Electrical and Electronics, Mar Athanasius College Of Engineering , Kerala ,India ---------------------------------------------------------------------***--------------------------------------------------------------------4 Assistant
Abstract - Power line carrier communication (PLCC) carries
bands, depending on the signal transmission characteristics of the power wiring used. Since the power distribution system was originally intended for transmission of AC power at typical frequencies of 50 or 60Hz, power wire circuits have only a limited ability to carry higher frequencies. The propagation problem is a limiting factor for each type of power line[3] communications. Data and distance limits vary widely over many power line communication standards. Low-frequency (about 100–200 kHz) carriers impressed on high-voltage transmission lines may carry one or two analog voice circuits, or telemetry and control circuits with an equivalent data rate of a few hundred bits per second; however, these circuits may be many miles long. Higher data rates generally imply shorter ranges; a local area network operating at millions of bits per second may only cover one floor of an office building, but eliminates the need for installation of dedicated network cabling.[1]
data on a conductor that is also used simultaneously for AC electric power transmission or electric power distribution to consumers. This MCU based project is to control the load shedding on the basis of current consumption of a costumer. A current sensor in consumer end monitors load current. In substation end a limit value of current that entered through keypad is transmitted through modem. The modem at the consumer end demodulates the data and gives it to the MCU. If current goes above limit value then the MCU operate relay to switch off the load. Operation of the system is set for peak time of 6.30 pm to 10.30 pm and RTC is used to set time. By this current monitored individual load scheduling system we can efficiently reduce unnecessary load shedding for long hours in an area. Key Words: Plc communication, Substation , Plc modem ,Consumer ,Current sensor, Current consumption ,Peak tme ,Regulation
2. WORKING
1.INTRODUCTION
This PLC based load scheduling system is used to control the load shedding on the basis of current consumption of costumers on peak hours through PLC modem.
Power line carrer communication (PLCC) carries data on a conductor that is also used simultaneously for AC electric power transmission or electric power distribution to consumers. It is also known as power line carrier, power line digital subscriber line (PDSL), mains communication, power line telecom (PLT), power line networking (PLN), and broadband over power lines (BPL)[2]. A wide range of power line communication technologies are needed for different applications, ranging from home automation to Internet access. Electrical power is transmitted over long distances using high voltage transmission lines, distributed over medium voltages, and used inside buildings at lower voltages. Most PLCC technologies limit themselves to one set of wires (such as premises wiring within a single building), but some can cross between two levels (for example, both the distribution network and premises wiring).[1] Typically transformers prevent propagating the signal, which requires multiple technologies to form very large networks. Various data rates and frequencies are used in different situations.
2.1 Transmitter Section Transmitter section has keypad, microcontroller, PLC modem, LCD displays and audio & visual indications. With the help of this keypad we can select a limit value for current for each device. This limit values for each device are transmitted to the receiver side through power line modem. The data entered is modulated and transferred through 230 V power lines along with AC signals.
1.1 Power Line Carrier Communcation Power line communications systems operate by impressing a modulated carrier signal on the wiring system. Different types of power line communications use different frequency
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