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In data mining, link prediction for the networks is one of the areas of greatest interest today. Research achievements of link prediction problem can be applied in many fields such as study genetically transferred diseases, online marketing, e-commerce services, discover the structure of criminal networks, friend request in social networks … However, most of researchers focused on predicting the existence...
Supplying electrical energy to the load on demand, economically and with acceptable levels of reliability and service quality is the main task of a distribution system. Energy distribution reliability is important in the competition conditions in electricity markets because consumers directly supply energy. Therefore, it is not enough to estimate how reliable the distribution system is at present...
Goal. To create a mathematical tool for assessing the quality of a complex system likely availability (or failure) in the presence of interrelation in the components operation. The tool is different from the Markov's chain and other analogs. Tasks. To introduce a binomial distribution as the sum of the probabilities of ordered subsets of the numbers of successful tests. Introduction to probability...
Degradation prediction is important for safety related products to avoid failures. When the degradations of multiple parameters of a product is taken into account, traditional univariate degradation prediction method is not applicable, especially when the parameters are correlated. To cope with this problem, Mahalanobis distance is proposed, to combine multiple parameters into one unified index. Then...
Power transformer has an important role to transfer energy from power plant to consumer. There are 325 banks of power transformer had been installed in PLN TJBB which various ages and manufacturers. In order to manage the assets, PLN TJBB implemented asset management system based on ISO 55001. One of asset management objective is to fulfill transmission service quality level. However, transformer...
Polar coding is a low-complexity method for communication over noisy classical channels, which is capable of providing highly reliable data transmission. This paper proposes an enhanced polar codec scheme for mission critical applications in train-to-ground wireless communications. Firstly, we develop an enhanced polar coding scheme to support reliable data transmission under time-varying channel...
Recently, fault indicators with communication function have been increasingly used in fault diagnosis of distribution networks. In this paper, an objective function which considers the reliability index of the distribution network and economic factors synthetically has been proposed for optimal placement of fault indicators in distribution networks, and binary particle swarm optimization algorithm...
In order to meet the needs of smart distribution grid evaluation in different regions and different information integrity systems, this paper presents a comprehensive evaluation system (CES) based on analytic hierarchy process (AHP) and adaptive correction method. First, a hierarchical frame structure of the CES is put forward. Then, a detailed design of the comprehensive evaluation index system (CEIS)...
Power system reliability must be considered in the site planning and operation of electric power system. Referring to “Rencana Usaha Penyediaan Tenaga Listrik PLN 2016-2025” document, the annual growth of Jawa Bali System is 8.4%. The growth of the load will increase the power flow in the 500 kV Jawa Bali System in which affects the index value of composite reliability. This study calculates reliability...
Based on the deficiencies for risk indicators of fault probability and consequence's application in distribution systems, the strategy of risk assessment for system operation based on health and importance indices is proposed. The health index oriented to system running states and importance index geared to the user diversity are defined, by comprehensively thinking about the development situation...
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...
Fault detection method using k nearest neighbor rule has shown its advantages in dealing with nonlinear, multi-mode, and nonGaussian distributed data. Once a fault is detected in industrial processes, recognizing fault variables becomes the crucial task subsequently. Recently, the method of fault variables recognition using k nearest neighbor reconstruction (FVR-kNN) has been reported. However, the...
In the document of RUPTL 2016–2025, PT.PLN plan to build new power plants with a total capacity of 7,220 MW as part of 35.000 MW project and new transmission lines Tanjung Jati — Cibatu Baru that will be operated in 2019. These projects are located at the northern line of Java Island. Calculation of power system reliability indices is performed at the hierarchy level II which is a combination of generation...
The energy efficiency level of wind turbines reflected its operation efficiency and provides evidence for the diagnosis. Currently, the evaluation study is concerned essentially with a part of Wind Turbine, but that has limitations. This paper establishes a synthetic evaluation index system of the energy efficiency evaluation of Wind Turbine from five respects, which include Comprehensive, profitability,...
Battery energy storage (BES) is an indispensable resource in stand-alone microgrids. A reliable and cost effective microgrid operation can be achieved when the BES is optimally designed and deployed. The BES lifetime, however, is greatly impacted by its operation where two important operation factors must be considered to prolong its lifetime, namely the depth of discharge and the number of cycles...
Wind power has become a candidate to replace some or part of the conventional generation to meet the continually increasing electricity demand. Yet, the stochastic nature of the wind speed and the rapid changes of wind turbine output increases the complexity of planning and operation of power systems. In this paper, a cost benefit analysis is developed for measuring the benefits of integrating wind...
Microgrids, as small-scale power systems, comprise various types of distributed energy resources (DERs) installed next to loads. Islanding, as a salient feature of microgrids, requires adequate installed dispatchable capacity to fully supply local critical loads when disconnected from the utility grid. There is however a great potential that this installed capacity is underutilized, resulting in negative...
The Parity check Transformation Algorithm (PTA) is a recently developed symbol wise soft decision decoding algorithm for Reed Solomon codes. The algorithm has been shown in literature to outperform widely used Reed Solomon decoders including the Koetter and Vardy (KV) algorithm. The PTA gets its name from the fact that it transforms the parity check matrix of the Reed Solomon code after every iteration...
Demand Side Management (DSM) has been become a popular option for improving electricity system operations and reliability. Moreover, Demand Response (DR) programs provide superior efficiency and flexibility to their users. This paper proposes a method to assess system reliability and evaluate the specific contributions made by spinning reserves (SR) and DR. The method structurally and spatially decomposes...
The reliability of a network with a diameter constraint is defined as the probabilistic connectivity of each pair of nodes by paths that travel through a limited number of communication channels. The task of diameter constraint network reliability calculation is NP-hard, so it is relevant to use various reduction and decomposition methods. We propose to use a serial-parallel network transformation...
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