AFRICON 

Abstract: This paper presents different aspects of implementation of phasor measurement unit (PMU) technology in power system static state estimation. Various options in the use of PMU measurements in power system state estimation are presented and tested. From the simulation study performed on the IEEE 14-bus test system, it is found that PMU measurements can increase the confidence in the state estimation result. This paper also investigates the possibility of using a new linear state estimation algorithm in parallel with existing the nonlinear estimator. It is shown that this linear estimator has certain advantages. The problem with different angle references of the estimator and angle measurements is investigated and possible solutions are presented.

Abstract: The Internet of Things (IoT) is a fast-growing movement turning devices into always-connected smart devices through the use of communication technologies. This facilitates the creation of smart strategies allowing monitoring and optimization as well as many other new use cases for various sectors. Low Power Wide Area Networks (LPWANs) have enormous potential as they are suited for various IoT applications and each LPWAN technology has certain features, capabilities and limitations. One of these technologies, namely LoRa/LoRaWAN has several promising features and private and public LoRaWANs are increasing worldwide. Similarly, researchers are also starting to study the potential of LoRa and LoRaWANs. This paper examines the work that has already been done and identifies flaws and strengths by performing a comparison of created testbeds. Limitations of LoRaWANs are also identified.

Abstract: The need for a maximum power point tracker in a photovoltaic system is explained A variety of photovoltaic panel maximum power point tracking methods are then briefly compared The optimal method from those compared, where the photovoltaic panel power-voltage curve is scanned periodically, and the maximum power point tracker is controlled by current, is discussed in detail Problems with this implementation are highlighted, and the design of a voltage-controlled implementation using the same power-voltage curve scan is presented Problems and advantages of this system are given

Abstract: It is widely accepted that transient stability is an important aspect in designing and upgrading electric power system. This paper covers the modeling and the transient stability analysis of the IEEE 14 test bus system using Matlab power system toolbox (PST) package. A three-phase fault is located at two different locations, to analyze the effect of fault location and critical clearing time on the system stability. In order to protect overhead transmission line, conductors and insulators, it is suggested that the faulted part to be isolated rapidly from the rest of the system so as to increase stability margin and hence decrease damage.