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This paper proposes a new methodology to solve the transmission expansion planning (TEP) problem based on relaxed N-1 criteria. An optimization technique is used to determine the best TEP plans through an adaptive multi-operator evolutionary approach. These plans are obtained by ensuring the N-1 security criterion and also relaxing it to accept pre-specified levels of equipment overload. The major...
Determining the time interval for preventive maintenance is one of the most important duties in programming maintenance guides. The purpose of planning the time interval is to keep and restore the reliability of equipment, which means selecting the suitable interval to avoid failures before they occur. Existing methods of determining a fixed-time interval always ignore influences such as cumulative...
Due to the ever rising energy demand accompanied by the unsustainable nature of fossil fuels a prototype shift has evolved from fossil fuelled units to clean energy resources. Microgrids which are amalgamation of clean energy resources with non renewable conventional units are becoming popular nowadays. From operational point of view, optimal planning of microgrid is necessary. Reasonably selecting...
In this paper, a predictive maintenance method for maintenance sequence planning problem of series-parallel systems is proposed, which minimizes the system maintenance cost based on the opportunity maintenance. Firstly, the influence relationship diagram is established by considering the topological structure relationship and the function influence relationship. Secondly, with the condition monitoring...
In this paper a new methodology for optimal planning of low voltage distribution systems is presented. The problem is formulated as a mixed integer non-linear model, which in addition to traditional aspects (costs of installing and upgrading of elements, and operative costs), considers penetration of distributed generators (DG) and the network reliability. The DG are modeled as PQ-nodes and the network...
In this paper, we have presented a stochastic dynamic programming model to optimize the cost of proactive replacement of power cables. The proposed methodology can be implemented on cables with known failure distribution and insulation degradation level; the methodology to estimate both of the elements is based on previously developed Non-homogenous Poisson Process model (NHPP) and stochastic degradation...
This paper introduces a new transactive energy (TE) scheme to determine energy trading strategies among transactive market participants in a transactive environment. In our proposed approach, distribution systems operator (DSO) generates distribution locational marginal price (DLMP) for transactive nodes (TNs). Then, TNs calculate transactive incentive signal (TIS) and transactive feedback signal...
As the new world order is running towards microgrid and renewable generation, effective planning of the same is the need of the hour. The major challenge in planning the integration of renewable generation is its derating nature. This paper proposes an optimal design approach for cost effective and reliable microgrid. The optimum combination of generation capacities of multiple energy carriers in...
The Life Cycle Cost (LCC) of power grid assets is a model that was born in China out of necessity because of the liberalization of the energy market. This theory is applied in power system planning to control long-term cost and short-term investment. We proposed a transmission network cost calculation model based on LCC to compare and select the schemes of smart grid planning which considers the effects...
This paper presents a new formulation for placement of switches in distribution of electric power. An approach for determination of the location of tie switches and section switches using a multi-objective microgenetic algorithm is proposed. In the procedure, load importance, reliability index, remote or manual controlled switch and investments costs are considered. The results are based on simulations...
In this work, we propose the combination of a state-of-the-art sampling-based local planner with so-called Velocity Costmaps to achieve human-aware robot navigation. Instead of introducing humans as “special obstacles” into the representation of the environment, we restrict the sample space of a “Dynamic Window Approach” local planner to only allow trajectories based on a qualitative description of...
To satisfy the stringent requirement of ocean monitoring in Marine Intelligent Transportation System, Marine Sensor Networks (MSNs) is envisioned as one of the most effective solutions. In this paper, we study the Heterogeneous and Double Paths MSNs (HDPM) architecture with Sensors (SNs) in view of the reliability of the networks. And we propose a generic integer linear programming (ILP) model to...
Power system interruptions have financial impacts for the utility, the customer and the community. A consistent approach to financial impact assessment for both planning and operations starts with fault data. Faults can be categorized and correlated with season and time of day in a time-element matrix. Statistical data can be modeled with Beta probability density functions. The paper shows how the...
The high investment cost associated with upgrading utility grid to supply remote area's demand for electricity makes the implementation of standalone microgrids inevitable. These microgrids normally consist of a mix of energy sources such as diesel generators, photovoltaic arrays, wind turbines, and fuel cells. In order to improve the microgrid reliability, reduce its operation cost, and address operational...
The electric power industry heavily relies on software tools for planning and operation. Some of these tools are widely adopted by utilities. It is foreseen that the industry will continue to use these tools until the next generation of grid analytical tools becomes available and mature. These tools, however, were usually designed to perform deterministic studies or limited probabilistic analyses...
Traditional transmission planning for electric power systems involves analyzing certain system conditions for a number of contingency events based on deterministic criteria. This paper discusses the motivations for ERCOT to explore probabilistic approaches in transmission planning and presents the potential applications of probabilistic planning methods that ERCOT is currently investigating. It also...
This paper proposes an Approximate Dynamic Programming (ADP) based approach for solving the long-term renewable generation expansion planning problem by considering the effects of hourly security-constrained unit commitment (SCUC). Compared with traditional approaches, the proposed approach can assist Independent System Operators (ISO) to determine the dynamic expansion for multiple years on the basis...
The locational mechanisms in MISO's capacity market may result in price separation between different capacity zones due to constraints in limiting capacity transfers between capacity zones. Managing this price separation risk is identified as one of the issues in MISO's resource adequacy construct. A new financial property right, Capacity Transfer Right (CTR), is proposed to hedge against this price...
WECC groups and vendors work closely together toward development of new tools and procedures to ensure consistency between the two major models used in WECC, (West-wide System Model (WSM) used by Reliability Coordinators and planning basecases used to perform operational and planning studies), This work includes program features that enable traditional software to read a node-breaker power flow snapshot...
Capital planning of a distribution electric power utility aims to improve the reliability of energy delivery to its customers. It is critical to prioritize capital investments on problematic feeders in a distribution network. SAIDI is one of the most commonly used key performance indicators of a utility. An optimal capital investment strategy should seek to maximize the intrinsic reliability of feeders...
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