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Although the main concern of consumers is to reduce the cost of energy consumption, zero-energy buildings are the main concern of governments, which reduce the carbon footprint of the residential sector. Therefore, homeowners are motivated to install distributed renewable energy resources such as solar energy, which includes photovoltaics (PVs), solar concentrators, and energy storage systems (ESSs); these installations are intended to maintain the homeowners' energy consumption, and the excess energy can be sold to the grid. In light of the comfort consumption suggestions made by users, this paper presents an optimal home energy management (HEM) for zero-energy buildings and low energy consumption. Firstly, this paper proposes a new optimization algorithm called random integer search optimization (RISO). Afterwards, we propose a new objective function to enable zero energy consumption from the grid and lower costs. Therefore, in this study, the primary energy resources for homes are PVs and ESSs, while the grid is on standby during the intermittency of the primary resources. Then, the HEM applies the RISO algorithm for an optimal day-ahead load schedule based on the day-ahead weather forecast and consumers' comfort time range schedule. The proposed HEM is investigated using a schedule of habits for residential customers living in Hong Kong, where the government subsidizes the excess clean energy from homes to the grid. Three scenarios were studied and compared in this work to verify the effectiveness of the proposed HEM. The results revealed that the load schedule within the comfort times decreased the cost of energy consumption by 25% of the cost without affecting the users' comfort. [ABSTRACT FROM AUTHOR]

In recent years, research efforts have focused on techniques for condition based maintenance of power cables. In this regards, several online partial discharge measuring systems are available in the market. However, use of the online PD measuring system in field poses several challenges due to presence of noise, attenuation and dispersion. Noise and attenuation cause pulse shape distortion which makes it more challenging to identify the original and reflected pulses when dealing with PD localization using the time of flight method. However any oversight in the use of online monitoring system can lead to erroneous measurements and interpretation. This paper reviews the online PD monitoring systems and presents the personal experiences of oversights that can occur during PD measurement using online system. Such mistakes if done in the field can lead to misinterpretation of results. [ABSTRACT FROM AUTHOR]