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Careful design and planning is essential for successful integration of energy storage system (ESS) in a shipboard dc hybrid power system. An optimization model for resiliency enhancement and total cost reduction is proposed in this paper. The resilience of a shipboard power system with and without ESS are evaluated by means of resiliency index values under fault conditions. Furthermore, the influence...
Because various uncertainties in power systems including forecast errors of load and wind power as well as forced outages of generators are difficult to be comprehensively and accurately considered, the existing methods of spinning reserve optimization considering low-carbon factors cost cannot coordinate the impacts of wind power scheduling on the reliability, economy and low-carbon emission of power...
The renewable energy plays an important role in the modern power system. However, the power output from the renewable energy highly depends on the environments and therefore has uncertainty issue. In this paper, we propose a stochastic expected recourse model for the system with the renewable energy. The proposed model is applied to a case study and the effect of renewable energy on the power system...
Many rural communities are not able to access the main power grid supply due to high cost associated with grid extension. The stand-alone renewable energy based hybrid power system is a significant adaptation to cope with increasing power demand along with environmental consideration in rural communities. In such a system, determining the correct size and capacity of renewable generating units to...
As more renewable energy resources connected by power electronics and gas-fueled generators are integrated into power grids, total system inertia has been significantly decreasing in recent years. The resulting decline in system primary frequency response threatens the reliability and stability of power grids. This paper aims to study the locational dependence of the impacts of inertia on system primary...
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...
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...
Power system operation became a challenging with the integration of variable and uncertain Renewable Energy Sources (RES) generation. The operational flexibility describes the technical ability of the power system to respond to the net-load within a controllable power at a certain time to accommodate the RES power output. The main objective of this paper is to analyse and evaluate the impact of the...
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...
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...
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...
This paper presents a probabilistic approach to evaluate the reliability of a synchrophasor-based multi-input damping controller. Considering the probabilities of losing input signals to the controller, expected damping for the critical electromechanical oscillatory modes are determined. A two input power system stabilizer that uses a local and a remote signal is considered as a test system to evaluate...
As Photovoltaic (PV) penetration level rapidly increases in the modern power systems, the adoption of energy storage systems (ESS) is a preferred option to control the rapid and unpredictable PV power fluctuations. It is desired to develop new reliability evaluation methods that can model and evaluate the reliability impact of these new entries. This paper has proposed an area risk based method that...
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...
In this work, we provide a completely new approach for a short-term power system reliability that can be utilized for system operation planning. The proposed index incorporates the system frequency as a reliability of the grid and its deviation over a short time period. Although frequency performance is often employed as a quality metric for the past system operation, our model can address the future...
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...
The electric power system is one of the most complex engineered systems. It is, thus, a challenge to design a market that is efficient, transparent, and provides the proper incentives to market participants. Existing market models employ constraint relaxations, which enable various constraints to be relaxed (violated) for a high penalty price. This paper examines the practice of allowing transmission...
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