A Wireless System for Monitoring Leakage Current in Electrical Substation Equipment (original) (raw)
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A solar-powered wireless data acquisition system for monitoring electrical substations
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This paper describes a wireless data acquisition system for monitoring electrical substations. The proposed system consists of a Wireless Local Area Network (WLAN-IEEE 802.11b/g) transmitter module equipped with a data acquisition system, having current and voltage sensors, a solar power supply with battery energy storage, and a receiver module connected to a remote controller for data processing. The system can be used to continuously monitor a variety of plant within the substation and has low power consumption with inbuilt overvoltage protection. A prototype has been built, and validation tests have been used to check its performance for monitoring of the leakage current of a distribution surge arrester and an insulator. The measured results are in close agreement with those recorded directly through a Data Acquisition (DAQ) card with fibre-optic and coaxial cable connected systems. The operation of this wireless system has been tested and proven resilient under high-frequency interference signals such as those generated by corona and surface discharges.
Using Wireless Sensors in the Remote Condition Monitoring of Secondary Distribution Substations
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A solution for the condition monitoring and diagnosis of electric components in secondary (MV/LV) distribution substations (SDS) is presented, for the purpose of providing real-time monitoring, assessment, and remote communication of a number of status conditions, so as to improve maintenance criteria and operational control, yet at reduced costs. This system is based on a fully modular platform that encompasses a number of different, independent and self-contained smart devices which, being adequately located throughout a SDS – whether it is cabin-, vault-, or pole-type –, are locally integrated by a higher level unit over a wireless lowpower, low-range network; a comprehensive functional integration may then be achieved over the Internet.
Radio Science
Monitoring of partial discharge (PD) activity within high-voltage electrical environments is increasingly used for the assessment of insulation condition. Traditional measurement techniques employ technologies that either require off-line installation or have high power consumption and are hence costly. A wireless sensor network is proposed that utilizes only received signal strength to locate areas of PD activity within a high-voltage electricity substation. The network comprises low-power and low-cost radiometric sensor nodes which receive the radiation propagated from a source of PD. Results are reported from several empirical tests performed within a large indoor environment and a substation environment using a network of nine sensor nodes. A portable PD source emulator was placed at multiple locations within the network. Signal strength measured by the nodes is reported via WirelessHART to a data collection hub where it is processed using a location algorithm. The results obtained place the measured location within 2 m of the actual source location.
International Journal of Distributed Sensor Networks, 2015
A wireless sensor network (WSN) with the potential to monitor and locate partial discharge (PD) in high-voltage electricity substations using only received signal strength (RSS) is proposed. The advantages of an RSS-based operating principle over more traditional methods (e.g., time-of-arrival and time-difference-of-arrival) are described. Laboratory measurements of PD that emulate the operation of a PD WSN are presented. The hardware architecture of a prototype PD WSN is described and the particular challenges of an RSS-based location approach in an environment with an unknown, and spatially varying, path-loss index are discussed. It is concluded that an RSS-based PD WSN is a plausible solution for the monitoring of insulation integrity in electricity substations.
The project named ‘Substation Monitoring System’ proposes an innovative design to develop a system based on microcontroller. It is used for monitoring the voltage, current and temperature of a distribution transformer in a substation and to protect the system from the rise in mentioned parameters. The objective is to monitor the electrical parameters continuously and hence to guard the burning of distribution transformer due to the constraints such as overload, over temperature and input high voltage. If any of these values increase beyond the limit then the entire unit is shut down by operating an Electromagnetic Relay. This relay is activated as soon as the parameters exceed the predefined threshold values. The relay also works as a circuit breaker to switch off the main power supply. RF communication is used to continuously send the instantaneous values to the intermediate station. The GSM modem is used to send the real time electrical parameters in the form of SMS. The system is designed to send a SMS alerts to the authorized person whenever the parameters (Voltage, Current and Temperature) exceeds the predefined limits.
A Review on an Efficient Monitoring Of Substations Using Microcontroller Based Monitoring System
The paper presents review on innovative design to develop a system based on AVR micro controller that is used for monitoring the voltage, current and temperature of a distribution transformer in a substation and to protect the system from the rise in mentioned parameters. Providing the protection to the distribution transformer can be accomplished by shutting down the entire unit with the aid of the Radio frequency Communication. Moreover the system displays the same on a PC at the main station which is at a remote place. Furthermore it is capable of recognizing the break downs caused due to overload, high temperature and over voltage. The design generally consists of two units, one in the substation unit, called as transmitter and display unit, and another in the Main station called as controlling unit. The transmitter and the display units in the substation is where the voltage, current and temperature are monitored continuously by AVR microcontroller and is displayed through the display unit. An RF transmitter is used for transmitting the signals that are obtained. The controlling unit in the main station by means of a PC and a RF receiver receives the RF signals that are transmitted by the Transmitter unit and reacts in accordance to the received signal. In general, the proposed design is developed for the user to easily recognize the distribution transformer that is suffered by any open or short circuit and rise in temperatures. The ultimate objective is to monitor the electrical parameters continuously and hence to guard the burning of distribution transformer or power transformer due to the constraints such as overload, over temperature and input high voltage. If any of these values increases beyond the limit then the entire unit is shut down by the designed controlling unit.
STUDY and analysis of systems for monitoring in power substations
Proceedings of the 15th …, 2011
The intensive development of science and technology in all areas of our daily live reflects and in the systems for monitoring and recording processes of abnormal modes in the power equipment of substations. Monitoring systems report their apogee in the development and application because of the fact that with minimal human effort it is possible to obtain maximum information about the observed object. The research work describes an analysis of transmission and record of data that are required for control transformers in service.