Abstract
In India, the electric power transmission and distribution loss is very high, about 7% in transmission and 26% in distribution. Though deployment of automated meter reading system will reduce losses, particularly in distribution, penetration of automated meter reading is low due to high costs involved. World over, the Two-Way Automatic Communications System (TWACS) is the most widely used power line communications technology offering two-way communication between substation and end users. The TWACS introduces disturbance on the power system voltage for short durations near zero-crossing to generate the outbound (from substation to end user) signal. To generate the inbound (from end user to substation) signal, short duration current pulses are introduced, near voltage zero-crossings. Information is generated as a sequential combination of voltage disturbances for the outbound signal and current pulses for the inbound signal. The current study proposes a low-cost modification of the TWACS to reduce voltage and current harmonics. The proposed system has been modelled and simulated using SIMULINK/SIMPOWER Systems. The simulation results show that there is a reduction in voltage harmonics from 0.84 to 0.17% and in current harmonics from 2.07 to 1.10%.
Highlights
Automated Meter Reading (AMR) refers to an energy meter reading system that makes it possible to read electronic energy meters remotely
This study has presented a novel method for automated meter reading based on power line based communications and has proposed the application of this technique for automated meter reading
This method is based on the modification of the most popular Power Line Communications (PLC) based AMR system today, the Two-Way Automatic Communications System (TWACS)
Summary
Automated Meter Reading (AMR) refers to an energy meter reading system that makes it possible to read electronic energy meters remotely. Due to the emphasis on energy management, AMR technology has shown remarkable changes over the years. In 1970s, power line carrier and fixed-line telephone-based AMR technologies began to evolve. The early 1990s saw the development of fixed radio-based networks where the radio receivers, transmitters and related infrastructure are installed in the field. Another big development in the mid-1990s was the Turtle system that earned its name because it was extremely slow. Over the last 20 years, as technology evolved, the utilities have embarked on large-scale implementations of AMR and these implementations have evolved into what is called Advanced Metering Infrastructure (AMI).
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