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When a power system is contaminated by power quality problems, a short transition will appear before power system restoring to a new stability state. The short transitions of various power disturbances correspond to different principal component characteristics. According to these characteristics, in this paper, a scheme based on transient behaviors using morphological max-lifting scheme (MMLS) and...
Renewable energy sources, such as wind and photovoltaic solar, have been increasingly integrated into electricity grids. They have introduced additional uncertainty to power systems along with uncertainty due to stochastic nature of demand. Traditional deterministic power flow does not provide sufficient information for the calculation and analysis of such power systems; therefore, to manage such...
Heating, ventilation and air-conditioning (HVAC) systems account for a significant portion of the energy consumed in commercial buildings. In this paper, an energy profiling methodology in a spatio-temporal framework is proposed through the development of a metric (called STEM) to gauge the performance of the HVAC systems. The metric takes into consideration both occupants' comfort and energy consumption,...
Uncoordinated charging of electric vehicles (EVs) using level 2 chargers, which have high power requirements (6–11kW), is a concern to power grid operators because it can lead to voltage instability. One solution to this issue is to coordinate charging scheduling. Various scheduling schemes have been proposed but discussion on the potential impact of the schemes to EV owners' comfort is very limited...
This paper presents an intelligent lighting energy management system which is combined with six lighting control functions i.e. occupancy control, time scheduling, daylight control, task control, personal control and variable power shedding. There are two modes in the proposed lighting management system, which are the automatic and the personal control. Users can also control the system through the...
Topology processing is a vital function of a power system state estimator. Detection, identification, and processing of the topology error are pre-requisites for successful execution of the state estimator. The conventional measurement residual based topology error processing methods may fail under certain measurement configurations and system topologies. This paper proposes an optimization based...
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