scholarly journals Modeling and Algorithm Research on Identification of Wrong Wiring Power Supply Region based on Classification Analysis

2021 ◽  
Vol 2068 (1) ◽  
pp. 012036
Author(s):  
Zongpeng Li ◽  
Liang Yu ◽  
Jian Liu ◽  
Liangli Su ◽  
Huang Tan ◽  
...  
Keyword(s):  
Power Supply ◽  
Loss Rate ◽  
Negative Power ◽  
Power Company ◽  
Before And After ◽  
Rate Maximum ◽  
Rate Minimum ◽  
Line Loss ◽  
Positive Line ◽  
Identification Model

Abstract The wrong wiring of the power supply region directly affects the accuracy of the metering data. This paper based on the existing data of the power supply regions, defined four indicators which include minimum negative line loss rate, maximum positive line loss rate, minimum power factor and maximum number of negative power values. Then by using the four indicators before and after the wrong wiring rectification of the historical wrong wiring regions and the decision tree algorithm, the wrong wiring regions identification model was built. The identification model was used to identify the wrong wiring regions in all regions of the power company, and the regions identified as wrong wiring by the model were inspected on-site. The inspection result shows that the precision of the model is satisfactory, which can effectively improve the inspection and rectification efficiency of the wrong wiring regions.

scholarly journals Research and Application of Transformer-User Identification Technology Based On Fault Diagnosis of Electrical Information Acquisition Equipment

2019 ◽  
Vol 136 ◽  
pp. 04054
Author(s):  
Muxin Zhang ◽  
Liyan Kang ◽  
Bing Cao ◽  
Ying Shang ◽  
Qiutong Wu ◽  
...  
Keyword(s):  
Fault Diagnosis ◽  
Power Supply ◽  
Information Acquisition ◽  
Loss Rate ◽  
Low Voltage ◽  
Factors Affecting ◽  
Professional Management ◽  
Marketing Professional ◽  
Power Line Carrier ◽  
Line Loss

The line loss rate of power supply enterprises is an important economic and technical index, which directly reflects the lean level of marketing professional management of power supply enterprises. At present, the confusion of transformer-user archives in transformer area is still widespread, which is a key issue in line loss management in power supply enterprises. As the downlink communication channel, low-voltage power line carrier can realize cross-station reading, which brings great difficulties to the identification of transformer-user relation. Because the data of calculating the line loss rate of the transformer area depends on the electrical information acquisition system, the running state of the electrical information acquisition equipment is also one of the important factors affecting the line loss rate of the transformer area. This paper will focus on the fault diagnosis technology of electrical information acquisition equipment, and use it to carry out the identification of transformer-user transformers.

Quantitative Analysis of the Fluctuation Reasons of Grid Line Loss Rate

2014 ◽  
Vol 672-674 ◽  
pp. 1060-1065
Author(s):  
Yu Ze Zhang ◽  
Wen Ying Liu ◽  
Wei Zhou Wang ◽  
Jing Jing Zheng
Keyword(s):  
Power Supply ◽  
Loss Rate ◽  
Loss Analysis ◽  
Factors Influencing ◽  
Power Supply Enterprise ◽  
Fluctuation Range ◽  
On Line ◽  
Line Loss ◽  
Major Factors ◽  
Electric Quantity

While analyzing the line loss, power supply enterprise always encounters circumstances in which the line loss rate swings heavily, especially during the months when there exists season alternate or long vacations, the fluctuation range of the line loss rate grows larger, and it will be apparently on the high side or on the low side. This text figured out the major factors influencing the fluctuation of the line loss rate, quantitatively analyzing three factors’ effects on line loss rate, which respectively are non-correspondence electric quantity for supplying and selling, the dedicated line which large consumer load transfers and the change of electric quantity which is nondestructive for sale, thus facilitating the grid enterprises dynamically analyzing the line loss in time, providing authentic line loss data for electric power departments at all levels, electricity board, power supply station, improving the accuracy of line loss analysis, dismissing the human factors during the fluctuation of line loss.

Research on SVM Line Loss Rate Prediction Based on Heuristic Algorithm

2013 ◽  
Vol 291-294 ◽  
pp. 2164-2168 ◽  
Author(s):  
Li Tian ◽  
Qiang Qiang Wang ◽  
An Zhao Cao
Keyword(s):  
Support Vector Machine ◽  
Heuristic Algorithm ◽  
Support Vector Machine Model ◽  
Loss Rate ◽  
Heuristic Algorithms ◽  
Support Vector ◽  
Machine Model ◽  
Rate Prediction ◽  
Line Loss

With the characteristic of line loss volatility, a research of line loss rate prediction was imperatively carried out. Considering the optimization ability of heuristic algorithm and the regression ability of support vector machine, a heuristic algorithm-support vector machine model is constructed. Case study shows that, compared with other heuristic algorithms’, the search efficiency and speed of genetic algorithm are good, and the prediction model is with high accuracy.

scholarly journals Design of a Low-Cost Ultra-Wide-Band Radar Platform

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 2867
Author(s):  
Marko Malajner ◽  
Danijel Šipoš ◽  
Dušan Gleich
Keyword(s):  
Power Supply ◽  
Software Defined Radio ◽  
Pulse Generator ◽  
Low Cost ◽  
Wide Band ◽  
Negative Power ◽  
Analog To Digital ◽  
Sample Rate ◽  
Improved Design ◽  
Strobe Pulse

This paper proposes an improved design of a pulse-based radar. An improved design of a pulse generator is presented using step recovery diodes and a signal mixer for the received signal. Two-step recovery diodes produce pulses of 120 ps in duration. A pulse generator is improved by removing the negative power supply, resulting in a reduced number of electronic pulses. A sampling mixer at the receiver’s site receives the generated signal and stretches it from picoseconds into microseconds. The improved pulse generator is also used in the sampling mixer as a strobe pulse generator, which makes the sampling mixer much simpler. The stretched signal is then sampled by a low sample rate using an analog to digital converter. The proposed radar design achieves up to 8 GHz bandwidth and an equivalent receiving sample rate of about 100 GSa/s. The radar is controlled using a software-defined radio called Red Pitaya, which is also used for data acquisition. The proposed radar design uses widely available commercial components, which makes radar design widely available with low cost implementation.

Speeding up Based on the Process Optimization of High Voltage Business Expanding

2014 ◽  
Vol 556-562 ◽  
pp. 1950-1953
Author(s):  
Juan Li ◽  
Hai Ying Jiang
Keyword(s):  
Process Optimization ◽  
High Voltage ◽  
Power Supply ◽  
Average Power ◽  
Economic Benefits ◽  
Access Time ◽  
Expansion Process ◽  
Power Company ◽  
Synchronous Operation

As the primary link and the accepting link of power supply and sale, the quality of business expansion is directly related to the economic benefits and social profile of the power company. By many measures, such as reducing the link of process and delayering business expansion process, realizing multi link synchronous operation and integrally operating all qualified links, the process of high voltage business expansion project is optimized. The practice proves that these measures effectively reduce the average time of power access, and improve the level of power supply service. Keywords: power supply company; business expanding; process optimization; average power access time

scholarly journals Smoking and Flap Survival

2018 ◽  
Vol 26 (4) ◽  
pp. 280-285 ◽  
Author(s):  
Kun Hwang ◽  
Ji Soo Son ◽  
Woo Kyung Ryu
Keyword(s):  
Loss Rate ◽  
Fat Necrosis ◽  
Flap Surgery ◽  
Flap Survival ◽  
Flap Loss ◽  
Significant Difference ◽  
Before And After ◽  
Alveolar Oxygen ◽  
Abstinence Period ◽  
Wound Tissue

Purpose: The aim of this study was to compare the complications of flap surgery in non-smokers and smokers and to determine how the incidence of complications was affected by the abstinence period from smoking before and after flap surgery. Methods: In PubMed and Scopus, terms “smoking” and “flap survival” were used, which resulted in 113 papers and 65 papers, respectively. After excluding 6 duplicate titles, 172 titles were reviewed. Among them, 45 abstracts were excluded, 20 full papers were reviewed, and finally 15 papers were analyzed. Results: Post-operative complications such as flap necrosis ( P < .001), hematoma ( P < .001), and fat necrosis ( P = .003) occurred significantly more frequently in smokers than in non-smokers. The flap loss rate was significantly higher in smokers who were abstinent for 24 hours post-operatively than in non-smokers (n = 1464, odds ratio [OR] = 4.885, 95% confidence interval [CI] = 2.071-11.524, P < .001). The flap loss rate was significantly lower in smokers who were abstinent for 1 week post-operatively than in those who were abstinent for 24 hours post-operatively (n = 131, OR = 0.252, 95% CI = 0.074-0.851, P = .027). No significant difference in flap loss was found between non-smokers and smokers who were abstinent for 1 week preoperatively (n = 1519, OR = 1.229, 95% CI = 0.482-3.134, P = .666) or for 4 weeks preoperatively (n = 1576, OR = 1.902, 95% CI = 0.383-2.119, P = .812). Conclusion: Since smoking decreases the alveolar oxygen pressure and subcutaneous wound tissue oxygen, and nicotine causes vasoconstriction, smokers are more likely to experience flap loss, hematoma, or fat necrosis than non-smokers. Preoperative and post-operative abstinence period of at least 1 week is necessary for smokers who undergo flap operations.

scholarly journals The driver design for N2O gas detection system based on tunable interband cascade laser

2019 ◽  
Vol 78 ◽  
pp. 03002
Author(s):  
Lihuan Liao ◽  
Jingjing Zhang ◽  
Daming Dong
Keyword(s):  
Power Supply ◽  
High Efficiency ◽  
Detection System ◽  
Tunable Diode Laser ◽  
Circuit Board ◽  
Gas Detection ◽  
Electrolytic Capacitor ◽  
Negative Power ◽  
Interband Cascade Laser ◽  
Driver Circuit

In this paper, the driver circuit for N2O gas detection system based on tunable interband cascade laser (ICL) is developed. Considering the influence of power supply stability on the digital-analog hybrid drive circuit of tunable diode laser absorption spectroscopy (TDALS), the high-efficiency TPS5430 is used to design the positive and negative power supply circuit. The large electrolytic capacitor + post-stage LC filter combination filter is used to effectively filter out high and low frequency ripple and switching noise. The use of thick high current trace + via + multilayer printed circuit board (PCB) design makes the line temperature rise smaller, more stable and durable, and uses high frequency shielding inductance to effectively reduce radiation interference to ensure the stability of the drive. The STM32F407, a highperformance microcontroller based on the ARM Cortex-M4 core, is used as the master control chip and generates a sawtooth scanning signal. The direct digital synthesizer (DDS) chip ICL8038 is used to generate a sinusoidal modulated signal of a specific frequency. The two signals are superimposed by a reverse addition circuit, and the laser drive signal is generated by a developed positive feedback balanced voltagecurrent conversion circuit. Experimental results show that the driver circuit can well meet the drive development requirements of N2O gas detection systems based on tunable interband cascade laser.

A Research on the Impact of Photovoltaic Power Network-Connected on Power Loss of Distribution Network

2013 ◽  
Vol 448-453 ◽  
pp. 2239-2244
Author(s):  
Yi Zhao ◽  
Li Liu ◽  
Wen Yao Sun ◽  
Quan Ping Zou
Keyword(s):  
Power Plant ◽  
Smart Grid ◽  
Power Loss ◽  
Power Plants ◽  
Loss Rate ◽  
Clean Energy ◽  
Power Network ◽  
Photovoltaic Power ◽  
Line Loss ◽  
The Impact

Smart Grid framework to achieve clean energy friendly access, to achieve energy conservation and reduction of environmental pollution, is to build the smart grid hallmark. Photovoltaic power plants grid, although to bring some impact on the grid, but also a certain role in promoting on the line loss rate decreased. This ignores the impact of other factors, only from the perspective satisfy voltage constraints, analyzing PV power plant different grid location and grid capacity for line loss rate.

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