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Wide Area Measurement system (WAMS) is best equipped to handle the dynamics of power system. WAMS performance is the function of its communication infrastructure. Communication infrastructure's performance is defined in terms of latency and utilization of links. This paper describes a communication model of WAMS designed in OPNET which uses fictitious PMUs installed at different locations. Latency...
The purpose of this paper is to relate the issues which have an impact on the interconnection of distributed resources to the utility grid. Impact that can be clearly seen is with respect to the types of distributed resources and the power electronic (PE) devices used to interface them. A balance has to be maintained between the type of DER's and the interfaces in order to get the maximum benefit...
In the delivery of electricity from the generating station to the consumers, Power Distribution System (PDS) plays a major role. Electric power utilities worldwide are adopting the computer aided monitoring, control and management of PDS to provide better services to the consumers. Recent advances in Information Technology and data communication system are being utilized to automate the electric PDS...
This paper focuses on how to ensure high reliability and long service life of photovoltaic (PV) inverters in the design phase. First, a standard usage model of inverters is proposed based on the study of the application environment in U.S.A. Then, the main failure mode, stress level, and useful life of critical components in inverters are analyzed. Finally, a proactive maintenance plan for long-term...
A highly reliable, fast, and deterministic communication network is required to support time-critical real-time monitoring, protection, and control functions of the substation automation systems (SAS). This paper proposes an Ethernet-based logical architecture for the substation communication network (SCN). Improved reliability, availability, and survivability of the SAS are demonstrated through the...
Increasing cost of gold (Au) for bonding wires and decreasing die and, therefore, bond pad size raise the demand for alternative bonding wire materials. A cheap alternative with good electrical conductivity is copper. Cu wire is harder than gold and aluminium. The material itself shows a pronounced strain hardening, so that the hardness increases significantly during ball bonding. These mechanical...
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