American Journal of Electrical Power and Energy Systems最新文献_第3页

Co-supplying the National Grid: An Assessment of Private Off-grid Electricity Generation in Juba-South Sudan 共同供应国家电网:朱巴-南苏丹私人离网发电评估

American Journal of Electrical Power and Energy Systems Pub Date : 2020-08-20 DOI: 10.11648/j.epes.20200903.12

Ladu David Morris Lemi, Michael Carnegie La Belle

{"title":"Co-supplying the National Grid: An Assessment of Private Off-grid Electricity Generation in Juba-South Sudan","authors":"Ladu David Morris Lemi, Michael Carnegie La Belle","doi":"10.11648/j.epes.20200903.12","DOIUrl":"https://doi.org/10.11648/j.epes.20200903.12","url":null,"abstract":"Despite the global campaign for energy transition towards renewable sources, South Sudan's electricity generation is exclusively diesel-based with an installed capacity of 12MW in Juba against 154MW demand. Persistent power outages have led to a rise in off-grid electricity self-generation using diesel generators. This study explored the available electricity generation options in Juba, quantified the off-grid electricity, and assessed the electricity market system dynamics through a survey involving 44 companies, 2 government institutions, and 2 solar energy retailers. The study found that the current off-grid installed generation capacity in Juba is higher than the on-grid with a total of 28.93MW from 142 generator-sets. 98% of this amount is diesel-fired and 2% is from solar. Running these generators for a month cost the companies US$ 533,204 on 589,760 liters of diesel, and the combustion of this fuel results in 1553.8 tCO2e emissions. Knowledge of solar energy adoption was low and showed a mixed perception with most companies having no/limited knowledge. Besides, the governance of the electricity market is monopolized by a government utility company without legal frameworks. The study recommends restructuring the electricity market to attract private players by developing legal frameworks and the creation of awareness for the promotion of solar energy.","PeriodicalId":125088,"journal":{"name":"American Journal of Electrical Power and Energy Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129161781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Color Influence and Genetic Algorithm Optimization in Interior Lighting Building 室内照明建筑色彩影响及遗传算法优化

American Journal of Electrical Power and Energy Systems Pub Date : 2019-12-31 DOI: 10.11648/J.EPES.20190806.14

Merim´e Souffo Tagueu, B. Ndzana

{"title":"Color Influence and Genetic Algorithm Optimization in Interior Lighting Building","authors":"Merim´e Souffo Tagueu, B. Ndzana","doi":"10.11648/J.EPES.20190806.14","DOIUrl":"https://doi.org/10.11648/J.EPES.20190806.14","url":null,"abstract":"The energy consumed by the lighting of the buildings represents a not negligible part of the total energy. The use of low-energy luminaires such as LEDs has significantly reduced this consumption, in addition to the reduction of greenhouse gases and the extended life of the lamps. To satisfy the basic principles of optimal lighting system design (i.e., maximizing uniformity and reducing the level of illumination by staying within the required normative range), many researches using optimization algorithms have been conducted with interesting results. This article proposes a multi-objective optimization model integrating the influence of the colors (in particular primary colors), of the different compartments of a room on the level of total illumination of the piece. The reduction of energy consumption is demonstrated by considering a specific model of illumination in which we introduced the reflection factor related to the colors of the surrounding environment. The subsequent use of genetic algorithms (NSGA III) makes it possible to find the optimal coefficient of variation of the LEDs or any other variable luminaires to have the desired energy value while keeping the same comfort for the users. The proposed model is implemented for the case of an office room. The results show an energy savings of up to 39% with red color. Of particular, results are obtained while maintaining regular illumination and changing the color of the pieces.","PeriodicalId":125088,"journal":{"name":"American Journal of Electrical Power and Energy Systems","volume":"314 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133758651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Techniques for Achieving High Power Equipment Reliability with Distributed Informational System 分布式信息系统实现电力设备高可靠性的技术研究

American Journal of Electrical Power and Energy Systems Pub Date : 2019-12-24 DOI: 10.11648/J.EPES.20190806.13

Arakelian Edik Koyrunovich, Sultanov Makhsud Mansurovich, Evseev Kirill Viktorovich

{"title":"The Techniques for Achieving High Power Equipment Reliability with Distributed Informational System","authors":"Arakelian Edik Koyrunovich, Sultanov Makhsud Mansurovich, Evseev Kirill Viktorovich","doi":"10.11648/J.EPES.20190806.13","DOIUrl":"https://doi.org/10.11648/J.EPES.20190806.13","url":null,"abstract":"The problem of power generating equipment reliability and safety of thermal (TPP), hydro (HPP) and nuclear (NPP) power plants at each its life cycle stage is set and the solution approach is proposed. The blockchain distributed data storage system to unite different members of the energy system is described. It is shown that the suggested technology allows decentralized data storage reliability increase due to the data exists till its last participant leaves and safety is ensured by the electric market participant consensus algorithm. The algorithm for the decentralized blockchain system is developed. The new technique for reliability design calculation based on using both constant and time-varying failure rate is introduced. It is suggested to use control action method expressed as the design, technological and operational parameters from the normative documents. The generalized model of reliability design calculation representing product of three components of failure free operation probability is developed. It is shown that developing new algorithms of statistical data obtaining and designing full repair processes allow planning equipment repair, obtaining and analyzing the corresponding reliability indeces when the equipment is in operation and then choose the most fitting repair time and amount optimization, operation mode selection and power plant long term equipment time in operation forecasting solutions. The technique for the power equipment condition forecasting by archival data stored in the distributed system, the data can be used to predict equipment failures and decide whether it should be repaired. It is shown that the desired prediction accuracy can be achived by using neural network due to its feature to reveal complex relations between input and output values.","PeriodicalId":125088,"journal":{"name":"American Journal of Electrical Power and Energy Systems","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130187500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal Power Plant Steam Turbine Output Operational Characteristics Change Probabilistic Model Driven by the Second Derivation Control Actions 二阶导数控制作用下火电厂汽轮机输出运行特性变化概率模型

American Journal of Electrical Power and Energy Systems Pub Date : 2019-11-26 DOI: 10.11648/J.EPES.20190806.12

Sultanov Makhsud Mansurovich, Trukhanov Vladimir Mikhailovich, Gorban' Yuliya Anatolyevna

{"title":"Thermal Power Plant Steam Turbine Output Operational Characteristics Change Probabilistic Model Driven by the Second Derivation Control Actions","authors":"Sultanov Makhsud Mansurovich, Trukhanov Vladimir Mikhailovich, Gorban' Yuliya Anatolyevna","doi":"10.11648/J.EPES.20190806.12","DOIUrl":"https://doi.org/10.11648/J.EPES.20190806.12","url":null,"abstract":"The subject of the research is thermal station power equipment, in particular steam turbines and steam turbine plant support equipment. In the modern context, when working lifespan of the power equipment outreached the limit, thus the goal is to assure it performance and availability for producing enough energy and heat. To reach the goal it’s necessary to design and implement the probabilistic models and techniques for power equipment reliability under present day conditions. The probabilistic second derivative output parameters change model of power equipment is first developed by the authors and is the scientific novelty of the research. In the paper the assumptions and suppostitions on which the model is based are described. The practical implication of the model consists of capability of rational maintenance and repair operation term estimation of thermal power plant steam turbines. The model is based on the mathematical statistics methods, probability theory and matrix calculus. The probabilistic model allows forecasting the output characteristics change in time and control actions explicitly. The example of output characteristics change for long term utilization is given. During the research the statistical power equipment elements failure and error material has been acquired and presented in relative failure and error share diagram. The internal and external technical and operational factors influencing the failure statistics are determined. For quantitive reliability estimation of power equipment the set of primary indices, influencing turbine performance and reliability, is presented.","PeriodicalId":125088,"journal":{"name":"American Journal of Electrical Power and Energy Systems","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126874362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristics of Indicators for Insulation Deterioration in 26 kV Generator Stator Windings 26kv发电机定子绕组绝缘劣化指标的特点

American Journal of Electrical Power and Energy Systems Pub Date : 2019-11-04 DOI: 10.11648/J.EPES.20190806.11

Soo-hoh Lee, Hee-Dong Kim, Tae-Sik Kong

{"title":"Characteristics of Indicators for Insulation Deterioration in 26 kV Generator Stator Windings","authors":"Soo-hoh Lee, Hee-Dong Kim, Tae-Sik Kong","doi":"10.11648/J.EPES.20190806.11","DOIUrl":"https://doi.org/10.11648/J.EPES.20190806.11","url":null,"abstract":"This study conducted and analyzed the results of non-destructive tests (AC current, dissipation factor, and partial discharge tests) and a destructive test (overvoltage test) on 26 kV-generator stator windings with a ground fault. The target generator was a steam turbine generator in operation for over 30 years, and ground fault in windings occurred because of the rapid and instantaneous temperature rise in the copper conductor owing to the partial loss of generator cooling water. By comparing the non-destructive test data measured during the planned preventive maintenance period two years before the ground fault and the data gathered just after the ground fault, the study conducted an in-depth analysis of the effect of moisture on insulation diagnosis factors. If both the dissipation factor and capacitance data increased when compared to those of previously estimated values at same applied AC voltage level, it represented that the insulation materials absorbed moisture. Moreover, it was further developed that both of the dissipation factor and capacitance surge voltage were detected when the discharge started whereas the concerned surge voltage for AC current was detected when the discharge was proceeded in some extent. It is expected that a wider understanding of insulation diagnosis factors developed from this study will contribute not only to a more reliable diagnosis data analysis but also a stable power supply by preventing accidents in advance.","PeriodicalId":125088,"journal":{"name":"American Journal of Electrical Power and Energy Systems","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122829210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New Multi Objective Approach for Optimal Network Reconfiguration in Electrical Distribution Systems Using Modified Ant Colony Algorithm 基于改进蚁群算法的配电系统优化网络重构多目标新方法

American Journal of Electrical Power and Energy Systems Pub Date : 2019-10-21 DOI: 10.11648/j.epes.20190805.13

Arouna Oloulade, A. Moukengue, R. Agbokpanzo, A. Vianou, H. Tamadaho, Ramanou Badarou

{"title":"New Multi Objective Approach for Optimal Network Reconfiguration in Electrical Distribution Systems Using Modified Ant Colony Algorithm","authors":"Arouna Oloulade, A. Moukengue, R. Agbokpanzo, A. Vianou, H. Tamadaho, Ramanou Badarou","doi":"10.11648/j.epes.20190805.13","DOIUrl":"https://doi.org/10.11648/j.epes.20190805.13","url":null,"abstract":"The losses in networks of Beninese Electrical Energy Company (SBEE) are very high and therefore constitute a concern for the operators. This work consisted in finding an optimal topology of a 41 nodes real network of SBEE by Modified Ant Colony Algorithms (MACA) in order to reduce the losses and ensure a continuous power supply to the customers in case of occurrence disturbances on any branch of this network. With technological breakthrough of Automation and Supervision Systems (SCADA), the operation of distribution networks can be ensured remotely in real time with the aim of minimizing losses, eliminating equipment overload and improving reliability. The criteria of technical performance improvement formulated under operating constraints are solved by Modified Ant Colony Algorithm (MACA) which is association of ant system and fuzzy logic on the Matlab platform. The best results obtained show the effectiveness and efficiency of this method. The SBEE's HVA networks can then be reconfigured automatically to significantly improve their continuity of supply and reliability. The improved results obtained after tests on a standard 33-nodes and a real 41 nodes networks show the robustness and accuracy of this MACA algorithm.","PeriodicalId":125088,"journal":{"name":"American Journal of Electrical Power and Energy Systems","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115291112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Reconfiguration of Solar Panels: Mathematical Model and Analysis 太阳能电池板的重构:数学模型与分析

American Journal of Electrical Power and Energy Systems Pub Date : 2019-09-17 DOI: 10.11648/J.EPES.20190805.11

Thanh Ngo Ngoc, N. Quang, Linh Bui Duy

{"title":"Reconfiguration of Solar Panels: Mathematical Model and Analysis","authors":"Thanh Ngo Ngoc, N. Quang, Linh Bui Duy","doi":"10.11648/J.EPES.20190805.11","DOIUrl":"https://doi.org/10.11648/J.EPES.20190805.11","url":null,"abstract":"Balance solar radiation between photovoltaic panels or between groups of photovoltaic panels will help to improve the efficiency of electricity generation of the entire solar power system, making the most of the solar energy converted into electricity power. In order to achieve this, it is necessary to reconfigure the connection of photovoltaic panels or groups of photovoltaic panels in the solar power system. In this paper, the general mathematical model for implementing resconfiguring of photovoltaic panels or groups of photovoltaic panels is presented in 2 parts: calculating to find out the optimal configuration connecting photovoltaic panels or groups of photovoltaic panels to achieve the highest performance of the solar system; and find out the best way to switch from the initial connection configuration state to the optimal configuration. The author focuses on analyzing and proposing mathematical models for two main problems in previous studies, developing objective functions and clear constraints, which are the rationale for evaluation of the quality and accuracy of the proposed algorithms, thereby developing more optimal algorithms than previous algorithms. Several experimental studies have been applied on a system of 4 solar panels. The archived results demonstrated the correctness and efficiency of the proposed mathematical model and optimal algorithm.","PeriodicalId":125088,"journal":{"name":"American Journal of Electrical Power and Energy Systems","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124903946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Research on Time-of-use Electricity Price Model Based on Hierarchical Clustering-Price Elasticity Theory 基于层次聚类-价格弹性理论的分时电价模型研究

American Journal of Electrical Power and Energy Systems Pub Date : 2019-08-15 DOI: 10.11648/J.EPES.20190804.12

Dong Jun, W. Pei, Palidan Ainiwaer, N. Shilin

{"title":"Research on Time-of-use Electricity Price Model Based on Hierarchical Clustering-Price Elasticity Theory","authors":"Dong Jun, W. Pei, Palidan Ainiwaer, N. Shilin","doi":"10.11648/J.EPES.20190804.12","DOIUrl":"https://doi.org/10.11648/J.EPES.20190804.12","url":null,"abstract":"The peak-valley time-of-use electricity price can reduce the peak-valley difference of the power system, improve the load factor and operational reliability of the power system, and bring huge economic and social benefits. With the continuous development of society, the resident load will gradually become the main component of the power demand response. Therefore, studying the changes of residential load under the time-of-use electricity price policy is of great significance for the grid companies to better develop demand-side management strategies and carry out load forecasting work. Firstly, this paper combines fuzzy mathematics theory with hierarchical clustering algorithm to divide the peak-to-valley period of the resident load, which ensures the accuracy of the peak-valley period segmentation. Then the load response curve of residents under the condition of time-of-use electricity price is obtained using the electricity demand price elasticity matrix based on the electricity-electricity price elasticity theory. The results show that the time-of-use electricity price policy can motivate users to change their electricity consumption behavior and achieve the effect of peak-cutting and valley filling. The effectiveness of the proposed model and method is verified by numerical simulation. The results show that the time-of-use electricity price policy can motivate users to change their electricity consumption behavior and achieve the effect of peak-cutting and valley filling. The effectiveness of the proposed model and method is verified by numerical simulation.","PeriodicalId":125088,"journal":{"name":"American Journal of Electrical Power and Energy Systems","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115280700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Design of Power Pool Scheme for Demand-Side Management of Co-Located Banks 同址银行需求侧管理电力池方案设计

American Journal of Electrical Power and Energy Systems Pub Date : 2019-07-26 DOI: 10.11648/J.EPES.20190804.11

E. Ezugwu, D. Dike, S. O. Okozi, M. Olubiwe, Chiedozie Francis Paulinus-Nwammuo

{"title":"Design of Power Pool Scheme for Demand-Side Management of Co-Located Banks","authors":"E. Ezugwu, D. Dike, S. O. Okozi, M. Olubiwe, Chiedozie Francis Paulinus-Nwammuo","doi":"10.11648/J.EPES.20190804.11","DOIUrl":"https://doi.org/10.11648/J.EPES.20190804.11","url":null,"abstract":"The design of a power pool scheme for demand-side management of co-located banks in Owerri metropolis, Nigeria has been carried out in this work. The paper addressed the problem of matching instantaneous load demand with appropriate generator capacities which results from dynamic nature of small and medium scale industrial load, such as co-located banks. It also aimed at proffering solutions to health and environmental problems associated with use of scattered single generators per firm. A model for interconnection of generators and loads in a pool structure was developed to form a ring network, analogous to a typical power system. One of the generators in the pool was chosen as the slack bus and the other generators and load buses were arranged in the power pool arrangement such that Newton-Raphson’s method could be applied in load flow analysis. With this modeling and application of appropriate schedule, a cooperative pooling model was developed such that only the exact generating capacities were deployed. The proposed model was simulated by paralleling three 200kVA generator units in a synchronized ring network to serve the entire five banks. Results from the load flow analysis showed that the per unit voltage magnitudes at buses 1, 2, 3, 4 and 5 were 1.000, 0.997, 1.000, 0.998 and 1.000 respectively, while voltage mismatch angles (degree) were also gotten as 0.000, 0.003, 0.024, 0.060 and 0.086 respectively for the buses 1 to 5. From the cost benefit analysis carried out, the benefit-cost ratio (BCR) of 1.965 was calculated, which showed that this project will be very beneficial to the co-operating banks. Scheduling the operations of the three generators using mathematical permutation and combination model showed that the total man-hour of the plant operators is reduced by 40%. Also, applying the greenhouse gases emissions cost model it was found that the carbon footprints i.e. greenhouse cost for the interconnected network is reduced by 40%.","PeriodicalId":125088,"journal":{"name":"American Journal of Electrical Power and Energy Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126916883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Demand Response Baseline Load Forecasting Based on the Combination of Time Series and Kalman Filter 基于时间序列与卡尔曼滤波相结合的需求响应基线负荷预测

American Journal of Electrical Power and Energy Systems Pub Date : 2019-06-26 DOI: 10.11648/J.EPES.20190803.11

Jun Dong, Shilin Nie

引用次数: 0