Tese de mestrado integrado. Engenharia Electrotécnica e de Computadores (Telecomunicações). Universidade do Porto. Faculdade de Engenharia. 2010

This thesis develops a power line carrier(PLC) communication module using FSK modulation technology by integration of PLC chip, with various hardware circuits such as DSP, signal coupling and amplifier circuits, filter. The communication performance and conduction EMI tests and executed for the communication module developed. The PLC module is then applied for appliance control of commercial customers to fulfill the demand response function for energy conservation by reducing the summer peak loading. Besides sending the load control command from central station in the smart grid, the power consumption of various appliances can also be collected and transmitted back to the control station via two way communication with the PLC communication module. Finally, the broadband PLC (BPLC) is applied for the CCTV supervision in system to support asset management of distribution room to prevent the power equipment from steal. With the remote control of light brightness and CCTV lens with high data transmission rate provided, the communication performance of PLC can therefore be verified in this study.

The objective of this thesis is to update the outage management system (OMS) in Taipower by verifying the phasing of distribution transformers and the connectivity of customers served by each distribution transformer. The GPS based phase measurement unit (PMU) is used to measure the voltage phasing of the transformer. The power line carrier (PLC) based identifier has been developed to support the identification of distribution transformer and all the customers served. In the thesis, four practical distribution feeders in Fengshan District of Taipower are selected for the update of distribution transformer phasing of OMS system for the update of distribution transformer phasing of OMS system. After correcting the phasing of distribution transformer in the OMS database, the attributes of distribution components are retrieved for the OMS system. The network configuration of distribution feeders is identified by exacting the topology process and node reduction to prepare the input data for load flow analysis. With the monthly energy consumption of customer from the customer information system (CIS) and the typical load patterns of various customer classes, the hourly loading of each transformer can be derived. By retrieving the actual power data of test feeders from the distribution dispatch control center (DDCC), the three phase load flow analysis is executed to solve the three phase currents of trunk line sections, laterals and distribution transformers. The three phase currents solved can therefore be applied to derive the strategy of three phase balancing of distribution feeders.

This master’s thesis deals with design and implementation of electric energy meter with support of automatic remote data collection. For the collecting of measured data is used narrowband PLC technology. The theoretical part describes the basic properties and standards of narrowband PLC technology, such as types of coupling circuits, modulations, frequency bands and interference problems. In the practical part, there is description of selected parts, such as control circuit power meter, modem, microcontroller and UART to USB converter. There are further described basic properties of narrowband PLC modem ST7570 by STMicroelectronics. The final chapter, implementation of the device, deals with designs of circuit PLC modem ST7570, power meter ADE7753 and converter USB to UART CP2102.

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