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Appropriate planning of charging facilities is of significant importance for the development of electric vehicles (EVs). Given this background, a planning model for siting and sizing of EV charging facilities based on zonal charging demand index is proposed with spatial and temporal characteristics of charging demands considered. A charging load prediction model based on the analysis of charging behaviors...
With the development of electric vehicles (EVs), the existing power system concerned will be challenged from several aspects due to the spatial and temporal stochastic distribution of the EV charging load. Given this background, a model for simulating the charging load of electric taxis under fast charging mode and battery swapping mode considering the passenger trip characteristics, stochastic driving...
The penetration of distributed generation (DG) in an active distribution system could affect the fault current level and characteristics of the original/traditional system. Thus, the protection system originally configured for a traditional distribution system should be updated to meet the operational requirement of an active distribution system. In developing a fault diagnosis method for an active...
The coupling between an electrical power system and a natural gas system has ever been strengthened with the increasing capacities of natural gas power generation and the development of power to gas (P2G) technology in recent years. New challenges are then introduced to the expansion planning of these energy systems due to the interconnections, since the natural gas or other energy systems are generally...
This paper presents the investigation of the root causes of the high voltage bushing failure in a Power Station which occurred on July 12, 2015 in Brunei Darussalam. Upon physically examining the burning parts of the bushing, a computer simulation was carried out to analyze the contribution of void sizes towards the failure of bushing. COMSOL Multiphysics software was used for the analysis. For simulation,...
Based on the dynamic time warping (DTW) matching method, a novel appliance identification algorithm for low frequency sampling load data is proposed. First, residential load sequences are segmented into subsequences composed of single appliance load profiles and multi-appliance load profiles. Then, reference load sequences of all candidate appliances, which have identical lengths, are generated before...
As the organization mode and technology of worldwide energy production and consumption are undergoing significant changes, the study on Energy Internet has attracted extensive attentions due to its broad application prospects. The power to gas (P2G) technology can not only enhance the capability of accommodating fluctuating renewable energy generation output, but also offers more choices for energy...
The network reconfiguration during power system restoration after blackouts usually takes a long and complex procedure. To address the uncertainties in the restoration steps and time involved, a CCP (Chance Constrained Programming) based method for network reconfiguration scheme optimization is proposed in this paper. The proposed method can generate the best restoration sequence to maximize the benefit...
In this paper, the soil resistivity has been measured in the vicinity of a power station which situated near Brunei Liquefied Natural Gas (BLNG) of the Belait District. According to IEEE 81-1983 standard, the soil resistivity of this substation is measured using the equipment Fluke 1625. The measured soil resistivity data are then used into the CYME GRD software to calculate the soil resistivity and...
Developing an elaborate load model for electric vehicles (EVs) charging is of great importance. First, analysis about the charging behaviors of five types of EVs is carried out based on survey results. Subsequently, a smart charging strategy which not only takes into account the user behaviors but also considers the real-time electricity price, is presented to regulate the charging behaviors of EVs...
In the current practice in China, electricity trading among various province is generally governed by relevant provincial governments, in the form of electricity contracts negotiated by two trading parties. The currently employed inter-provincial electricity trading mode and settlement method in China Southern Power Grid (CSG) are first introduced in this paper, and two main issues of the current...
Based on risk management theory, a nonlinear programming model for optimizing the coal inventory is developed by taking the CVaR as a risk measuring index while considering the coal-fired power plant's carbon emission constraint and the cost of purchasing a CO2 quota. In the developed model, the objective is to minimize CVaR under a given expected profit. Some uncertain factors are taken into account...
An aggregator undertakes multiple tasks in smart distribution network such as energy trading, grouping and providing market access to demand response (DR) resources, coordinating EV charging, efficiently controlling smart appliances of consumers and communicating with the distribution system operator (DSO). In this context, a bi-level linear programming model is established for an aggregator of day-ahead...
The penetration level of renewable energy generation has been increasing in some actual power systems, and hence introduces some new problems and even challenges for transmission system planning. In modern transmission system planning, it is necessary to consider the accommodation capability of renewable energy generation, in addition to the traditional requirement for power system reliability. Given...
In this paper, an artificial neural network (ANN) has been used to compare the pollution level of aging long-rod silicon rubber and porcelain insulators. High regression values and effective correlation of equivalent salt deposit density (ESDD) have been found using MATLAB neural network toolbox. It has been found that the bottom surface of the porcelain insulator contains more pollution than the...
As plug-in hybrid electric vehicles (PHEVs) are expected to be widely used in the near future, a mathematical model is developed based on the traditional security constrained unit commitment (SCUC) formulation to address the power system dispatching problem with PHEVs taken into account. With the premise of power system secure operation, both the economic benefit for PHEV users and the carbon-emission...
Understanding human participants' trading behaviors is important for market designers. When analyzing the sensitivity of a control variable, it is of crucial importance to keep all other variables fixed, as well as human behaviors. In this paper, a hybrid interactive simulation methodology is introduced and utilized to model emission trading behaviors of generation companies. By extracting information...
A ferroresonace circuit consists of a voltage source, a capacitor and a nonlinear inductor connected in series. The initial flux in transformer core plays an important role on the onset of different types of ferroresonance modes. In this paper, the likelihood of the onset of sustained fundamental mode ferroresonance under the influence of the initial flux is investigated. The flux linkage, the voltages...
The controllable charging/discharging load of electric vehicles (EVs) is believed to be one of the most promising resources for flexible dispatching in the future smart grid. Power system operation could benefit from the reasonable control of EV charging behaviors. On the other hand, EV aggregators should be given some economic incentives for participating in power system optimal dispatching. In this...
Electric vehicles (EVs) will play an important role in the future smart grids. In order to implement the charging/discharging optimization and control for numerous electric vehicles, a large amount of data will be generated and transmitted. The communication of vast information imposes a significant challenge to the performance of the communication network in a charging station of EVs. Given this...
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