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This paper presents the baseline concept for a multi-year system development of a pico-hydroelectric power system in Nepal. Prior work on pico-hydro systems has focused on one or a few of the factors required for value sustainment over the full life cycle of the system. In contrast to prior investigations, this work provides a systems engineering approach to generate a highly contextualized solution...
Micro grid (MG) is becoming a very good substitution for traditional grid. It is capable of supply DC or AC power with the help of hybrid distributed generator. These are capable maintain good power quality (PQ) and reliable supply with full control over voltage and current. MG could optimize capital resource by reducing maintenances and operating cost. This reduces loss and generation cost and increases...
Mobile platform pervades human life, and much research in recent years has focused on improving the reliability of mobile applications on this platform, for example by applying automatic testing. However, researchers have primarily considered testing of single version of mobile applications. Although regression testing has been extensively studied for desktop applications, the approaches for desktop...
Future low carbon generation scenario would see an enhanced grid penetration of green generation sources like wind and solar, thus replacing the traditional generators. This may lead to sudden imbalances between generation and load, leading to drop in system frequency. The low inherent inertia and primary frequency response (PFR) capability of these non-synchronous generators would result in large...
These days the consumption of fossil fuel is increasing substantially and the major proportion of it is consumed by transportation sector. So, electrification of vehicles is one way to minimize their dependence on fossil fuels which also plays a significant role in reducing the greenhouse effect. However, vehicles transformation enhances the electric load which has a significant impact on current...
While renewable generation sources provide many economic and environmental benefits for the operation of power systems, their inherent stochastic nature introduces challenges from the perspective of reliability. Existing optimal power flow (OPF) methods must therefore be extended to consider forecast errors to mitigate in an economic manner the uncertainty that renewable generation introduces. This...
The higher penetration of Non Dispatchable Energy Sources inspite of its many obvious benefits may cause system stability into jeopardize. Also its ability to increase system reliability needs to be examined due to its inherent intermittency. This problem can be overcome by using a mix of renewable energy sources and also the use of storage units. A Microgrid consisting of wind and PV connected to...
To increase the maximum possible benefits of technical, economic and environmental aspects, the optimal sizing and sitting of distributed generation in distribution system has always been challenging for customers as well as to utilities. The objective of optimum sitting of distributed generation in a distribution system is to reach suitable operation of such systems with minimization losses of the...
Using generic defined wave energy converters, sub-system block diagrams and reliability diagrams are developed. Devices have common aspects such as moorings or seabed fixings, but the method of electrical power conversion can differ depending upon the device. Reliability analysis is applied to the different electrical power take off mechanisms employed, in particular hydraulic, direct drive and turbine...
A new reliability assessment method for distribution system with distributed generations (DGs) is proposed in this paper, aiming to quantitatively analyze the undesired impact caused by passive islanding detection failure. Firstly, the paper analyzes the impacts of DG interconnection on auto-reclosing operation and system reliability due to failure of anti-islanding detection when a transient or permanent...
Usually, water-pumping systems for diesel generator DG were used to extract the water in particular in remote areas. However, growth in the photovoltaic (PV) market and wind power make them competitive. In this context, a comparative study of three different types of pumping systems with tank storage namely PV / DG / Tank, PV / Tank and DG / Tank have been proposed. A techno-economic study of these...
Lack of quality electricity supply in the remote areas is one of the main hindering factors of global development. Many countries around the world are trying to utilize renewable energy sources for remote electrification including developing countries like Bangladesh. After the renowned Solar Home System (SHS) program, Bangladesh is now focusing on solar PV-diesel hybrid minigrid system to reach more...
This paper develops a conversion function and method transforming from daily peak load curve used LOLED [days/year] to hourly load curve used LOLEH [hours/year] firstly. The indices can not only be conversed just arithmetically but also have different characteristics physically because of using their different load curves. The conversion function is formulated as variables of capacity and forced outage...
A stochastic production simulation model was developed to evaluate the California Independent System Operator (CAISO) system capacity and flexibility sufficiency in order to integrate high volume of renewable generation to meet the California state renewables portfolio standard (RPS) goals. The model, which simulates the operation of the CAISO system, uses four stochastic variables, generation resource...
Based on the equivalence method of sensitivity consistency and component particularity representation, an equivalent power flow model and a minimum load shedding model are proposed. With these two models, an equivalent reliability evaluation method considering the equivalence of external system is developed. Because the sensitivity information, voltage support, power support and transfer characteristics...
This study develops alternative user friendly generator maintenance scheduling(GMS) considering not only probabilistic reliability maximization but also probabilistic production cost minimization. Furthermore, the proposed GMS system has various kinds of objective functions as like as CO2 minimization. The probabilistic reliability objective includes LOLE(Loss of load expectation), EENS(Expected energy...
Wave energy is an important renewable source of electricity that can be exploited. The reliability is an important issue for these energy converters due to the fact that they must be installed in harsh environments. The paper presents a reliability analysis of the linear generator type wave energy converters and shows the impact of the environment on the components of these devices.
This paper proposes a new method for evaluating Effective Load Carrying Capability(ELCC) and Capacity Credit(C.C.) of power system including Wind Turbine Generator(WTG) combined with Battery Energy Storage System(BESS). WTG can only generate electricity power when the fuel(wind) is available. Because of fluctuation of wind speed, WTG generates intermittent power. In view point of reliability of power...
Due to the increasing integration of renewable resources and the deployment of energy storage units at the power distribution level, conventional deterministic approaches may not be suitable or effective for evaluating the reliability of active distribution networks anymore. This paper proposes a new method to evaluate the active distribution system reliability including microgrid and energy storage...
Due to the increasing power demand and the aging equipment, the electric power grid is faced with pressing challenges for maintaining its power supply reliability in an efficient and economical manner. Network topology optimization (NTO) is a promising, cost-effective method to improve the operational flexibility and the overall reliability of power systems. In this study, NTO is incorporated into...
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