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The good operation of Java Bali System aims to achieve a reliable, efficient and economical Operating System. Reliability is generally examined in two criteria: availability of supply (adequacy) and securities (quality of voltage, frequency, and dynamic stability). Currently, there are many reliability parameter applied in Java Bali System such as bulk system, generation, and transmission. All these...
Reasonable maintenance strategy can decrease power grid operation costs and enhance competitiveness of power grid. Therefore, according to the principle of system condition-based maintenance, an equipment imperfect maintenance model is built based on a modified Kijima II model, which considers electrical equipments' maintenance outage model and repair outage model and the effects of equipment maintenance...
Utilities use the bus/branch model for planning and operations studies. In the bus/branch model, bus numbers are used as unique identifiers. However, bus numbers can change due to addition of equipment, specific substation configurations (splitting buses) or due to equipment outages. This often creates problems because many auxiliary files used in power system studies need to be modified. If the node/breaker...
This paper presents a new probabilistic methodology for sizing the number of spare transformers for a group of power distribution substations. Based on a chronological Monte Carlo simulation, the proposed methodology allows the assessment of several reliability indices and expected costs, even considering systems composed by transformers with different ages and non-exponential lifetimes. Real conditions...
Distribution Network Expansion Planning (DNEP) is the most important factor in the demand growth in the distribution system. Planning involves the best installation of new facilities such as allocation of new feeders, new substations, new routes of new feeders to substations and tie-line routes to other feeders. The Monte Carlo Simulation (MCS) is used for this purpose. In this paper, a new modification...
This paper develops a model for distribution network expansion planning (DNEP) considering the reliability issues. With simultaneous switch placement and DNEP, the proposed model tries to adequately consider the reliability issues in the planning stage in a way that the designed network has suitable performance from the reliability viewpoint. Reinforcement or installation of MV feeders and HV/MV substations...
Distributed Power take advantage of clean new energy sources, combined with the actualsituation of the country, flexible and efficient power generation, has been valued by allcountries of the world. Distributed generation in the power system is used widely on theexisting distribution network system to produce a far-reaching impact. DG access to thedistribution network, to ensure the reliability of...
In this paper, a robust methodology is proposed for planning multistage distribution networks. The scenario set is used to describe the uncertainty of DGs and loads in which the quantity and type are simultaneously considered. Furthermore, controllable load is considered apart from traditional load. Based on the constructed scenario, high-voltage/medium-voltage (HV/MV), feeder route, tie-line and...
The purpose of this paper is to formulate, document and present a novel optimal distribution substation bus design methodology considering reliability and economics. A simple test system is used to evaluate and compare four common distribution substation bus configurations. Capital, maintenance and operating costs including the costs of system losses as well as the expected customer outage costs have...
This paper classify loads by load characteristics indexes, and optimize the combination of the load, in order to make the load characteristic curve integrated optimal. The method ignores the industry information of the loads, and results in the more similar character among loads in the same classification. This paper establish optimal combination model of load based on the different types of typical...
The stability and reliability of electric power grids are essential to the continuous operation of modern cities as well as for the mitigation, preparedness, response and recovery in disaster management. Power systems must be assessed in order to identify and address component and system-level weaknesses while supporting their rapid restoration. This paper proposes a Bayesian Network (BN)-based framework...
Traditionally, reliability evaluations for substation configurations and distribution networks are performed separately and substation reliability evaluation only focuses on a single substation. This paper presents a technique to assess the reliability of multiple substations with associated distribution networks. Based on Markov modeling, a clustering approach, a linear programming algorithm and...
This paper discusses new types of sensors and data management approaches that can be applied to operate and manage the grid more efficiently and flexibly while maintaining reliability. Sensors can help increase awareness of asset condition and grid conditions for more optimum management of the grid. Integration of sensors with system models to predict conditions on the grid can further improve the...
Power Supply Model(PSM) of MV distribution system is presented to resolve the problem that conventional analysis only gave regards to feeder connection mode so as to neglect coordination power supply with multiply voltage levels and substation structure in different landform and load density. First, the impacts of different characters of landform and load density on the PSM is analyzed; Second, Power...
This paper proposes a method to optimally allocate two types of distributed generation (DG) in the distribution network to maximize the worth of this connection to the Local distribution company (LDC), as well as, the different customers connected to the system. The two types are natural gas based and fuel cell DG units. The fuel cell based DG units represent a renewable dispatchable source of energy,...
The continuity of electric energy supply to consumers is a permanent objective of the power utilities, pursuing the development of technological solutions to improve the performance of the power re-establishment in contingency conditions. The main purpose is to minimize the impact on the number of consumers affected and reduce the time required to re-establish the energy supply. In this way, the power...
The paper discusses the modeling of substations for reliability, dealing with each equipment and its influence in the topology. The study consider the power availability for each load, using either an analytic and a simulation model. Some results and a software implementation are presented.
We discuss the evolving role of communication and control for automatic load management in electric distribution systems. We start by reprising a description of the Athens project - one of the earliest deployed examples of automatic load management at consumers enabled by communication signals. We observe that the use of communication for such systems has gone through distinct phases in its evolution...
Significant distributed generation (DG) will be connected to distribution systems. As a result, the integration of this generation may change the assumptions under which the systems were designed and results in the operation situations that do not occur in a conventional system without directly connected distributed generation. Careful engineering planning for DG penetration is therefore needed. Understanding...
This paper describes the application of a probabilistic reliability calculation method to a countrywide transmission network in an actual case study. The calculation method and certain general aspects of reliability analyses in the transmission level are presented at first. The case study is introduced, and special considerations on defining suitable parameters for the Markov-based calculation algorithm...
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