Siti Hajar Raman

Remote terminal unit (RTU) hardware design and implementation efficient in different application

This paper introduces the design and the development of RTU module with small remote telemetry unit suitable for different application in low voltage system. The design based on microcontroller which represents the intelligent brain of any low cost RTU. Small sizes RTU are responsible for data acquisition in substations and accomplishment of central station commands. This paper presents a new hardware design for an RTU that performs based on a PIC16F877 device operating at 20MHz and runs from a 9-24V AC/DC supply. The design is composed of four main modules with its own components in the architecture which include communication interface, analogue input, digital input and digital output. All operational tasks will be handled by a non-expensive distribution automation system through it intelligent RTU by providing the best solutions without human intervention. Only Intelligent RTU together with the SCADA is capable to perform intelligent decisions on the distribution automation tasks. An intelligent Microcontroller based RTU for distribution automation system is proposed to innovate and renovate the downstream part of the power distribution system including the most advance communication networking system. This method utilizes automation concept of creating an intelligent RTU through modification and innovations.

Development of a new modeling circuit for the Remote Terminal Unit (RTU) with GSM communication

This paper introduces the design and development of Intelligent Remote Terminal Unit (RTU) which is to be applied as an automation technique for operating and controlling the low voltage (LV) downstream of 415/240V to enhance reliability of power for the consumers. The design proposed based on Global System for Mobile (GSM) communication and this paper also presents an efficient design for distribution automation system and its implementation in remote/automatic monitoring and controlling of the relays (circuit breaker) by means of GSM Short Message Service (SMS) services, automatic decision making and continuous monitoring of distribution system components in real time [1]. The systems has been equipped with microcontroller as a main component which act as an RTU programmed using Microcontroller PRO compiler software. The RTU provides monitoring fault operation, controlling functions and data collection for analysis. RTU will initiate the transaction with the digital and output modules. The master of this system is RTU and the slaves are digital and output modules. RTU plays an important role in detecting fault and assigned to serve message immediately in the control room. This system involves the detection of fault connected to the microcontroller (PIC18F77A) and GSM modem. When the fault occurs, the sensor will send the signals to the PIC16F77A. The PIC is programmed to process the data and send the signals to the GSM modem. Once received the data, GSM will send the message to the control room operators or other authorized personnel to alert them on the current situation through cellular phone. The results are then communicated between hardware circuit and simulation circuit for the final conclusion with the properly functional algorithm.

A Low Cost Wireless Data Acquisition System for Distribution Automation System

This paper analyzed the design and development of a 16F877A microcontroller-based wireless data acquisition system. Besides, it also discussed the possibility of different existing methodologies to be linked to field data acquisition from distribution automation systems. Various existing data transmission techniques were studied, especially for wireless systems such as satellite, radio, GSM and paging. The hardware and software implementations were included. The system was used for reading, storing and analyzing data which were obtained from DAS. The wireless communications were based on the GSM network. The laboratory results were compared with the simulation results to determine final conclusion.

Remote Terminal Unit Developed for Distribution Automation System (DAS) Using MPLAB Software

Remote Terminal Unit (RTU) is a standalone data acquisition and control unit which monitors and controls an equipment at a remote location from the central station that utilizes Distribution Automation System (DAS). The RTU acquires information such as measured values, signal, meter readings and it transmits command or instruction, sets points, controls variables and monitors function time. In the present Distribution Automation System (DAS), the distribution field of automation allows the utilities to implement a flexible control of distribution system to enhance efficiency, reliability, and quality of electric service. The implementation of distribution automation system is highlighted based on two factors; benefit and area of distribution automation system implementation. The hardware design uses PIC16F877A microcontroller to control all the functions of RTU. The types of fault detected are undervoltage and overcurrent. The design consists of MPLAB software development using C programming and hardware assembly. RTU is also designed to communicate with the Supervisory Control and Data Acquisition (SCADA) system and resulting in RTU’s ability to detect undervoltage and overcurrent fault.