POWER MANAGEMENT SCHEME FOR WIRELESS TELEPHONY SERVICE PROVIDERS

The relationship between the mobile phone service providers and their service consumers since the about seven years ago when mobile phone became fully integrated into Nigeria society is to say the least rough. Accusations of poor services coupled with high charges are levied against the service providers and in defense the service providers blame it on high running cost especially fuelling and maintenance of generating sets for power supplies. Hence, for mobile phone service providers to provide satisfactory service to their customers, there is need for efficient power management system. This work finds the average power supply per day, cost of the Base Transceiver Station (BTS) generating set, cost of installing the generating set, fuel consumption of the generating set per certain periods based on BTS equipment data provided by one of the service providers, routine maintenance cost of the generating sets, etc and compare these with Photovoltaic (PV) system. The findings reveal that an environmental friendly renewable energy technology, a photovoltaic system is a potent alternative power source especially when life cycle cost (LCC) analysis is invoked and the site management scheme proposed is adopted. PV system has been found to be cost competitive with the conventional system

Power Quality Events Segmentation in a Voltage Waveform using Joint Triggering Point Detection Scheme

Accurate and timely detection of power quality (PQ) events is imperative for adequate corrective measures to be taken. This paper presents a method of PQ event detection development called joint triggering point detection (JTPD) scheme with a view to achieving a more accurate PQ event detection in a voltage waveform. The JTPD combines the advantage of cumulative sum (CUSUM) algorithm for the statistical distribution of a signal waveform and the discrete wavelet transform (DWT) for change-point detection. The performance of JTPD scheme using detection rate was compared with CUSUM and DWT schemes and based on the analysis, the detection rate of JTPD, CUSUM and DWT were 100%, 95% and 50% respectively. With this, the proposed approach outperformed CUSUM and DWT schemes by 5% and 50% respectively. Hence, the proposed approach is suitable for accurate detection of voltage dip, swell and interruption PQ events Keywords: Cumulative Sum, Discrete Wavelet Transform, Joint Triggering Point Detection, Power Quality, Voltage Wavefor