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Incorporating advanced software and hardware technologies, to create a two way electricity and information flow, is forming the concept of the smart grid (SG). In an SG the energy delivery and control not only autonomous but also efficient. Hence, intelligently-planned SG which aims to consume energy wisely will be able to gain benefits for both power grid and end-users. Thus, the end-user continuity...
This paper describes the application of the distributed maximum power point tracker (DMPPT) to increase the energy yield of the photovoltaic (PV) system during partial shadings. It compares the performance of PV modules fitted with the SPV 1020 DMPPT chip to the one without it. Experimental work is carried out using eight polycrystalline modules, mounted on a two-axis rotating tracker. The partial...
The main objective of this paper is to analyze two different types of nine level inverters. This paper depends on the multilevel converters with multiple numbers of DC sources and presents cascaded H-bridge nine level inverter and multi string nine level inverter topologies with four input DC sources. The purpose of this paper is to show the differences between these two converters in terms of modulation...
The present paper describes the application of the biogeography-based optimization approach to determine the optimal real time reconfiguration in radial distribution smart networks. The main objectives are to minimize the active power loss. A detailed performance analysis is applied on 33, 69, 84, and 118 bus networksto illustrate the effectiveness of the proposed methodology.
Transmission line congestion is a critical factor that will affect power system operational cost. With more renewable energy in the future grid and the intermittence of nature, transmission line congestion will be more frequent. Due to the congestion, renewable plant has to curtail some available generation. This paper investigates the use of active transmission line switching operation in power system...
This paper experimentally investigated a fault location algorithm based on upgrading distribution substation smart meters with synchrophasor capability. The developed time-synchronized measurements can be used to upgrade distribution substation relays functions and to define fault location based on data exchange with primary substations. The upgraded smart meter results are tested and compared with...
In this paper, a novel prediction-based switching control approach is proposed for DC-DC buck converters. This approach can be implemented directly with digital devices, and no complicated modulation is involved. The buck converter is modeled as a sampled-data switched affine system. In order to avoid the delay of switching signal, a novel prediction approach is adopted. The switching law is designed...
KAHRAMAA initiated AMI pilot project in 2012 for 17,000 customers including both, residential and commercial categories in three different zones in Doha, Qatar. AMI Pilot project aims to evaluate technology suitability and feasibility to overcome the regional challenges for roll out. As I am sure everyone is aware of the complexity involved in AMI deployment, it is very important to identify all the...
This paper presents maximum power point tracking (MPPT) and decoupled power control for single phase grid-tied photovoltaic (PV) systems. Model predictive control (MPC) technique is used to extract the maximum power from the PV array and feed it to grid. The stochastic behavior of solar energy necessitates MPPT of PV system to operate at maximum power point and make the system economical. Power control...
The objective of this paper is to design and implement an efficient and economical dynamic voltage restorer (DVR) to compensate for voltage sag conditions in oil and gas industry. In a power distribution system or plant facility, faults occurring can cause voltage sag that can affect critical loads connected in the power network. Due to the complexity and sensitivity of loads, a short voltage sag...
Photovoltaic (PV) power generation performance in desert environments is affected by surface soiling due to dust deposition. In this study, PV performance, ambient dust and weather conditions were measured continuously from June 1 through December 31, 2014 at a solar test facility in Doha, Qatar. Averaged over the seven months, the PV performance loss due to soiling was 0.0042+/−0.0080 per day for...
This paper presents a novel power control strategy for a hybrid power supply system consisting of wind-driven permanent magnet synchronous generator (PMSG) and energy storage device. In this study, a single leg multi-mode power converter, which includes a boost and bidirectional converters to control power flows between energy sources and loads, has been used as a dc/dc converter. This converter has...
This paper presents a novel photovoltaic (PV) based three-phase three-level grid-interactive inverter. The proposed system consist of a DC/DC converter, and a three-phase three-level inverter. In order to ensure maximum power point tracking, incremental conductance (IC) technique is used. In addition, to meet international standards for all operating modes, three-phase three-level inverter has been...
This paper proposes a novel algorithm for optimal planning of plug-in electric vehicle (PEV) charging facilities. The proposed algorithm takes into consideration the stochastic nature of PEV mobility in terms of arrivals to and departures from the charging facility. The objective of the planning algorithm is to jointly determine the optimal number of deployed electric chargers and waiting space size...
One of the major electrical load on a utility grid is industrial, street and residential lightings. To enhance the energy efficiency and as a measure of energy conservation, incandescent lamps (IL) are replaced with the modern lights. Replacing incandescent lamps with compact fluorescent lamp (CFL) and fluorescent lamp (FL) is one of the measures taken by the authorities to reduce the energy consumption...
Demand response is an important component in future power systems as it allows better utilization for the resources. Similar to sources control in islanded microgrids, certain loads might be controlled using droop relations to achieve autonomous demand response. A droop based demand response scheme is proposed in this paper to enable the loads from participating in maintaining supply/demand balance...
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