bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Commutation Failure of DC Transmission System Based on Harmonics
Authors: Chenyang Chu , Lixia Sun 
Published: October 2020

Abstract
The paper summarizes the micro mechanism and key influencing factors of consequential commutation failure in the HVDC transmission system, which mainly includes the harmonic impacts on the secondary commutation failure. And it quantitatively analyses the adverse effects of harmonics on commutation through the time area of commutation voltage, hence the main factors affecting the time area of harmonic voltage can be obtained. And the harmonic influence coefficient F

n
is introduced to reflect harmonic voltage’s influence level in the worst case of commutation. Then, a method based on harmonic voltage area is proposed to reduce the risk of secondary commutation failure, that is, through introducing the negative harmonic current feedback by harmonic voltage feedback gain index K

n
to reduce the direct current at fault. The validity and practicability of the method were proved by simulation analysis.
Secure Data Communication for Wireless Mobile Edge Computing Based on Artificial Noise and Security Code
Authors: Lv Zhining , Tang Jie , Deng Wei , Qiao Zhongwei , Wen Hong , Du Yu 
Published: October 2020

Abstract
As increasing threat to wireless mobile edge computing communication and high cost of conventional encryption implement in wireless mobile edge computing environments. The physical layer security has aroused widespread interests to increase the secure transmission and communications of mobile edge computing data communication in wireless networks. This work investigates the mobile edge computing secure communication by MIMO beamforming and artificial noise (AN) system with secure code. From practical consideration, in this work, we consider a coded system and investigate its achievable secrecy rate under the realistic wiretap code with limited code length and modulation. We proposed the mobile edge computing secure transmission scheme which could make almost zero information obtained by the unknown eavesdroppers with keeping certain quality of BER performance for the main channel simultaneously. The simulation results verify this proposed mobile edge computing secure transmission scheme performance. It shows great implement ability.
Flexible Multi State Switch of Distribution Network Based on Flux Controlled Adjustable Reactor
Authors: Tang Xiaoliang , Yang Fang , Zhou Yabing , Zhang Guangyi , Gong Jie 
Published: October 2020

Abstract
Flexible Multi-states Switch based on power electronics technology can realize the flexible interconnection between feeders, elastically control feeder power flow and solve the serious unbalance of feeder power flow in the distribution network. To solve the problem, this paper proposes that using flux-controlled variable reactor as the topology of flexible multi-states switch in distribution network. Firstly, flux-controlled variable reactor’s principle will be introduced; Then, we analyze the principle of feeder power flow’s control using variable reactor; After that, the control strategy for the flexible multi-states switch with different access methods is proposed; At last, a MATLAB simulation model and the prototype experiment platform are built. The results verified the power flow control function of flexible multi-states switch and effectiveness of proposed controlled strategy.
A Grid-Connected Microgrid Optimal Allocation Method Considering Self-Balancing Rate
Authors: Quanming Zhang , Xiaodi Zhang , Ke Sun , Dan Zhou , Wei Tong 
Published: October 2020

Abstract
Microgrid optimal allocation is the primary problem that needs to be solved in the stage of microgrid planning and design. Whether the optimal allocation scheme is reasonable or not will directly determine the safe operation and economic benefits of microgrid. Unreasonable allocation scheme will lead to higher power supply costs and poor performance, and can not even reflect the inherent superiority of microgrid. In this paper, based on some indicators such as the self-balancing rate, the power fluctuation rate of the tie line, and the proportion of spontaneous self-use, the effect of the different operation strategies of the wind/light/storage grid-type microgrid is analyzed firstly. Then, an optimal allocation method for grid-connected microgrid is proposed. Furthermore, based on the economic scheduling operation strategy, considering the initial investment cost, replacement cost, operation maintenance cost, residual value and purchase electricity cost, the optimal allocation scheme with different self-balancing rate is compared.
The Different LVRT Control Strategy of Wind Generator Suppressing for Transient Overvoltage by DC Commutation Failure
Authors: Xuemao Zhao , Ling Zhu , Wei Fan , Fusuo Liu , Yiding Jin , Xuelian Wu 
Published: October 2020

Abstract
At present, the characteristics of large capacity DC and high proportion of new energy centralized delivery is showed for power system of China. The ability of UHVDC to transmit new energy is severely reduced for caused transient overvoltage after AC/DC contingencies and further research is urgently needed. Firstly, the transient overvoltage caused by DC commutation failure is analyzed based on the large-scale wind power centralized delivery of the actual power system. Then, the physical mechanisms of transient overvoltage of converter station and wind farms resulted are analyzed by the actual power system DC commutation failure contingencies recorder. The impact of wind generator low voltage ride through (LVRT) active/reactive power characteristics for transient overvoltage is emphatically analyzed. Finally, all the analysis results are verified through simulation of practical case systems. The study can provide technical references to safe and stable operation of the power system in new situation.
Research on the Quality Evaluation Method of Transmission and Transformation Inspection Data
Authors: Jiafeng Qin , Chao Gu , Juntao Lv , Demeng Bai , Wenjie Zheng , Meng Liu 
Published: October 2020

Abstract
In the era of big data, transportation and inspection data of power transmission and transformation equipment have the characteristics of diversity and richness. Massive data provide data support for state assessment of power transmission and transformation equipment, but at the same time, it also puts forward higher requirements for traditional data management and data quality mode. In this paper, the application of density distribution function estimation and information entropy statistical method in data quality evaluation of transmission and transformation equipment is studied. From the perspective of data integrity, validity and consistency, a five-dimensional data quality evaluation model is established to realize the information checking and quality evaluation of transmission, transformation and transportation inspection based on data characteristics and business rules. On the one hand, it can be compared and evaluated before and after data cleaning, on the other hand, it can also be convenient to find problems in the process of data collection
Research on the Economic Benefits of Roof Photovoltaic Based on the Non-Subsidy Mode of Environmental Benefits
Authors: Yang Changhui , Xia Rongrong 
Published: October 2020

Abstract
Photovoltaic power generation is the main alternative to coal power generation, in order to reflect the environmental benefits of photovoltaic power generation, this paper integrates the net carbon transaction cost and environmental protection tax in the life cycle of photovoltaic power generation into the calculation of indicators of LCOE and IRR, selects eight representative regions of China’s roof photovoltaic for economic benefit evaluation, and selects four indicators for sensitivity analysis of LCOE and IRR. The results show that the cost reduction range is 0.0083-0.0593 Yuan / kWh under the condition of measuring the net carbon dioxide, sulfur dioxide and nitrogen oxides emissions, the establishment and improvement of carbon trading market and environmental protection tax will help to improve the economic benefits of users; other regions can achieve user side parity without considering the financing cost except Chongqing; reducing the cost of photovoltaic power generation and improving the unit power generation are the main factors to improve the economic benefits.
An Evaluation and Diagnosis Model for the Operating Tempo of Electric Energy Meter Auto-verification Line System based on Fuzzy Inference
Authors: Wang Lixin , Xu Yongjin , Jiang Mihui , Li Chen , Huang Xiaoqiong , Li Tong , Yu Min 
Published: October 2020

Abstract
With long-term operation of the electric energy meter auto-verification line system, any change of the operating tempo in each link may cause the decrease of the overall system efficiency. Due to the characteristics that the operating tempo change is not easy to detect and the bottleneck in system is difficult to locate, this paper proposes to take operation time T1 and cycle time T2 of each link as the evaluation basis of operating tempo, according to the operation characteristic of the auto-verification line system and the feasibility of time node acquisition. By analysing the timeout reasons of each link’s single T1 and single T2, 3 indicators for evaluating operating tempo in each links are proposed. Based on fuzzy inference, the evaluation score for each link’s operating tempo is calculated with the input of 3 indicators. Furthermore, the score can be used to diagnose the bottleneck in the auto-verification line system. The evaluation and diagnosis model is verified by case analysis, it can evaluate actual operating tempo of the auto-verification line system effectively, diagnose the “bottleneck” which affects the operation efficiency of the system, and provide strong support to improve the efficiency.
Planning and Design of Secondary Monitoring System
Authors: Tong X Y , Li K , Sun K M , Wu H , Wang X , Zhang G H 
Published: October 2020

Abstract
The current safe and stable operation of the power grid is highly dependent on secondary systems such as protection, security control, decommissioning / load shedding, automation, and communications. Compared with the means of primary grid monitoring, analysis, and control technology (EMS), the construction of secondary system monitoring, analysis, and control technical means (SMS) is lagging behind and cannot fully meet the needs of the secondary system itself and the safe and stable operation of the power grid, which has become a short board that restricts the development of power grid regulation and control business. The secondary system bears the important responsibility of monitoring, protecting and controlling the primary equipment. Once an important secondary system such as the three lines of defense of the power system and the dispatch automation master station are abnormal, it will pose a serious threat to the safe and stable operation of the power system and may lead to an increase in the scope of the failure or even a large-scale power outage. The construction background, ideas, goals, and overall architecture of the secondary monitoring system are described, and the system functions and typical scenarios are displayed to provide a reference for related research and construction work.
Data Augmentation Method for Switchgear Defect Samples Based on Wasserstein Generative Adversarial Network
Authors: Huang Xueyou , Xiong Jun , Zhang Yu , Liang Jingyi , Haoning Zhang , Liu Hui 
Published: October 2020

Abstract
The problem of sample imbalance will lead to poor generalization ability of the deep learning model algorithm, and the phenomenon of overfitting during network training, which limits the accuracy of intelligent fault diagnosis of switchgear equipment. In view of this, this paper proposes a data augmentation method for switchgear defect samples based on Wasserstein generative adversarial network with the partial discharge live detection data of the substation and the real-time switchgear partial discharge simulation experimental data. This method can improve the imbalanced distribution of data, and solve the problems such as the disappearance of gradients and model collapses in the classic generative adversarial network model, and greatly improve the stability of training. Verification through examples and comparison with traditional data augmentation methods. The results show that the data augmentation method mentioned in this paper can more effectively reduce the data imbalance, improve the performance of data-driven technology, and provide data support for subsequent fault diagnosis of switchgear equipment.
Fault Detection of Wind Turbine Converters with Time Sequence Processing and Attention Model
Authors: Wang Anqi , Qian Zheng , Jing Bo 
Published: October 2020

Abstract
Fault detection methods of converters can improve the stability of wind turbines and reduce the maintenance cost. In order to achieve more accurate converter fault detection, this paper proposes an encoder-decoder structure based on the Long Short-Term Memory (LSTM) network. The LSTM network is considered to extract the sequence information of SCADA data to improve the accuracy of fault detection. Moreover, we introduce attention models into our method. Attention models can enable the network to selectively focus on the most useful variables and data during training and testing period. Specifically, we use the time attention model to calculate the importance of data at different times in the sequence, and the feature attention model to learn the importance of different variables. Experimental results on SCADA data show that our method achieves 7% -14% higher fault detection accuracy than other anomaly detection methods.
The Occurrence of Escherichia coli in Groundwater of Bekasi City (Case Study: Jatiluhur, Sumur Batu, and Jatirangga Urban Villages)
Authors: Maysarah S , Putri G L , Pratama M A , Zulkarnain F , Willetts J , Foster T , Genter F , Harris A , Priadi C R 
Published: October 2020

Abstract
The self-supply of groundwater at the household level, and especially in densely populated areas, is vulnerable to fecal contamination. The aim of this study was to assess the level of fecal contamination in groundwater of three urban villages in Bekasi City that depend greatly on groundwater: Jatiluhur, Sumur Batu, and Jatirangga. Water samples were taken from 255 households with various types of water sources in the rainy season from February-March 2020. Escherichia coli (E. coli) concentration was quantified with Colilert-18 using IDEXX Quanti-Tray/2000 based on Most Probable Number (MPN) method. E. coli levels were beyond the WHO standard and found in 60% of the sources; 24% were above 100 MPN/100 mL. The presence of E. coli in groundwater indicated a requirement for further treatment prior to the point of consumption and an urgent need to replace the water supply infrastructure for improved water sources.
How Waste Is Managed in Urban and Rural Areas: Evidence from China
Authors: Pan Zeyi 
Published: October 2020

Abstract
Waste disposal method has long been one of the severe environmental problems in China. A few previous researches suggest that the waste disposal method may related to the awareness, education and the willingness of participation of people. However, an overview of the waste disposal of China from the community level is lacked. As a result, China Health and Retirement Longitudinal Study (CHARLS) is used in this research to show the correlation between waste disposal method demographical information. In the research, we find that communities/villages with denser population tend to adopt the cleaner waste disposal method. We also find that fundamental socioeconomic factors such as education and income are closely related to waste management. Communities/villages with higher average education level and higher average income are more likely to adopt a cleaner waste disposal method.
The effect of Angkak and a toxic dose of erythrosine on histopathology of mice (Mus musculus) kidney
Authors: Esa R T , Sari D K , Jamaluddin A W 
Published: October 2020

Abstract
Angkak was a traditional fermented natural product originating from China. Some advantages of Angkak as food coloring were a more consistent and stable color, the ability of pigments to dissolve in water, the colors could be mixed with other pigments and were safe for consumption. Erythrosine was one of the synthetic dyes used as a food coloring. The compound was known to cause thyroid tumors, nerve disorders, and damage to chromosomes. Erythrosine was usually used in animal products as a dye in the sausage wrap. This study aimed to determine the effect of Angkak and Erythrosine on the histopathological features of mice kidneys. This study used 15 male mice, which were divided into five groups. The control group was given NaCMC, the treatment group 1 (KP1) was given Angkak at a dose of 0.0523 g, the treatment group 2 (KP2) was given Angkak at a dose of 0.523 g, the treatment group 3 (KP3) was given Angkak at a dose of 5.230 g, and treatment group 4 (KP4) was given erythrosine at a dose of 13.227 g for 30 days. All treatments were given peroral. On the day-31, all mice were necropsied, and the kidneys were taken for histopathological preparations with Hematoxylin-Eosin (HE) staining. The histopathological features were analyzed descriptively. The results showed the narrowing of the lumen, congestion, hemorrhage, necrosis, and infiltration of inflammatory cells were most commonly found in treatment KP4 given a toxic dose of erythrosine. In KP1, KP2, and KP3 given Angkak, there was no severe damage compared to KP4.
Values of urinalysis dipstick in evaluating high-protein, low-carbohydrate, low-fat diets in male wistar rats
Authors: Masrika Nur Upik En , Arsyad Aryadi , Yustisia Ika , Djabir Yulia Y 
Published: October 2020

Abstract
One popular diet pattern currently recommends a high-protein, low-carbohydrate diet as a weight-loss strategy in obese patients. Diets high in protein appear to reduce appetite, energy intake, body weight, and fat buildup. The purpose of this study was to determine the effect of long-term high-protein, low-carbohydrate and low-fat (TPRKRL) diets on body function. With a focus on urine analysis using the urinalysis dipstick and the Urine Analyzer Verify U120 tool from 22 samples of male Wistar rats that were given the standard diet and the TPRKRL diet for 8 weeks. The results showed that the TPRKRL diet on 8 variables had lower mean values than standard rats and there were significant differences in leukocyte counts, pH, specific gravity, ketones and bilirubin between the two groups. Whereas in the urobilinogen, protein and blood variables there were no significant differences. As well as other parameters namely nitrite and glucose abnormal abnormalities were not found.
Evaluation on reproductive and productivity characters of wheat (Triticum aestivum L.) genotypes grown in the lowlands
Authors: Farid BDR M , Nasaruddin  , Anshori M F , Chaerunnisa A N J 
Published: October 2020

Abstract
The objective of this study is to obtain mutant and convergent wheat breeding lines adapted to lowlands with high productivity and high heritability characters. This research was carried out in Bonto Parang, Tolo Selatan Village, Kelara District, Jeneponto Regency with coordinates 5°24′58.0″S 119°54′58.2″E at 135 m above sea level (asl). This research took place from May to September 2019. This study was arranged with Randomized Complete Block Design with 20 genotypes and 4 control varieties (Dewata, Guri-3, Selayar, and Nias). The study was conducted with 3 replications so that there were 72 experimental units. The results show that adaptive mutant lines and convergent wheat breeding in lowlands with high productivity were shown by genotype N 250 4.6.2 (2.27 t ha−1), S 300 7.9.1 (2.29 t ha−1), S 300 8.3. 1 (2.35 t ha−1), N 200 2.5.2 (2.27 t ha−1), S 300 2.1 (2.29 t ha−1), CBF6-110 (2, 31 t ha−1), and CBF6-192 (2.37 t ha−1). Characters that have high heritability values were panicle length, the number of spikelets per panicle, seed weight per panicle, the potential yield per plant, and productivity.
Method of dna extraction of local maize (Zea mays l.) Tana Toraja, South sulawesi, Indonesia using modification of buffer ctab (cethyl trimethyl ammonium bromide) without liquid nitrogen
Authors: Ramlah  , Aziz I R , Pabendon M B , Daryono B S 
Published: October 2020

Abstract
Maize is one of the cereals strategic with economic value as well as having the opportunity to be developed due to its position as the main source of carbohydrates and protein after rice. The purpose of this research is to get the efficiency method of DNA extraction which contains good quality and quality through modification of extraction buffer CTAB without using liquid nitrogen. DNA extraction was the initial part of the molecular analysis process. The extract of DNA was important, it need to be maintained for its quality and quantity by using an appropriate and efficient method. The results showed that DNA extracted from maize using modification of buffer CTAB was efficient method, have good quality and quantity. The product of PCR amplification in local maize using phi032 primers showed clear and thick appearance of DNA bands. Six alleles detected ranging from 175.5 to 369 bp. The accuracy and efficiency of the methods need to be adapted to several things, such as sample form, type of the organism, sample origin, sample condition, and the character of the sample. The description of DNA extraction method was indispensable, regarding to support the maize genetic breeding program in the future.
Developing a new Software for increasing knowledge about nutritional needs during pregnancy
Authors: Sunarti  , Salina  , Tahira  , Syarif Syafruddin , Ahmad Mardiana , Manapa Esther Sanda , Jibril  , Usman Andi Nilawati 
Published: October 2020

Abstract
This study aimed to increase the knowledge of pregnant women about nutritional needs during pregnancy through an Android-based learning media. This study was an experimental study that intends to innovate in the form of an application called Mattampu in pregnant women for all trimesters to increase their knowledge about nutrition during pregnancy. Research sites are the Kanjilo Health Center and Pallangga Health Center in Gowa Regency as long as one month. Measurement of knowledge is carried out twice, namely before and after the provision of education with the application. Before providing education, training was held in advance on how to use the application by the research team. Knowledge of nutrition of pregnant women regarding nutrition during pregnancy at all trimester levels shows that the category is less before education was given through the application of mattampu, and after that, the knowledge of pregnant women at all trimester levels increases to be good. Android-based educational application is able to improve knowledge about nutrition in mothers both in the first, second, and third trimesters.
Identification of endoparasites in Spotted deer (Axis axis) gastrointestinal tract conserved in Hasanuddin University entrance park, Makassar
Authors: Gandong Z B , Sari D K , Wirawan H P , Ris A 
Published: October 2020

Abstract
The objective of this study was to identify endoparasite in the Spotted deers’ (Axis axis) gastrointestinal tract conserved in Taman Pintu Satu (Park entrance) Hasanuddin University, Makassar. The study was conducted from October to December 2014 and continued in February 2015. Thirty-three samples were collected randomly and examined by the fluid method. Results showed that endoparasites were found in one of 25 samples in the dry season and three of eight samples in the wet season. The endoparasites were identified as Oesophagostomum spp, Haemonchus sp, Eimeria spp. The season, geographical location, and temperature were considered as the most critical factors of the occurrence of parasites in one place. This finding indicates that some factors could lead to the occurrence of endoparasites in animals, especially in Spotted deer.