scholarly journals Design and Control Motorized Circuit Breaker in Electrical Distribution Panel

2021 ◽  
Vol 2117 (1) ◽  
pp. 012021
Author(s):  
R I Sudjoko ◽  
Hartono ◽  
Suhanto ◽  
Kustori ◽  
S Hariyadi ◽  
...  
Keyword(s):  
Response Time ◽  
Main Part ◽  
Circuit Breaker ◽  
Reliable Control ◽  
Voltage Measurement ◽  
Circuit Breakers ◽  
Safe Operation ◽  
Internet Connection ◽  
And Control ◽  
Monitoring Application

Abstract A circuit breaker is the main part of the distribution panel that needs to control for safe operation. It is important for protection and switching in the power system. Automatic control of circuit breakers using motorized can be realized by the microcontroller scheme. In this paper, a microcontroller equipped with wifi and an internet connection is used to control and monitoring the circuit breaker. The design of the circuit is proposed and experiment result is obtained. The response time is about 1 second to complete the process to control the circuit breaker. Error in monitoring application is about 3% for voltage measurement and 3.5% for current measurement. The proposed circuit system showed good and reliable control and monitoring of circuit breakers in every condition include of closing, opening, and monitoring.

scholarly journals Research on the Difference Mechanism of High Voltage Circuit Breaker’s Opening/Closing Coil Current

2021 ◽  
Vol 261 ◽  
pp. 01014
Author(s):  
Yi Su ◽  
Yufeng Lu ◽  
Lei Zhang ◽  
Xiajin Rao
Keyword(s):  
High Voltage ◽  
Circuit Breaker ◽  
Structural Difference ◽  
Circuit Breakers ◽  
Coil Current ◽  
Factors Affecting ◽  
The Operating Mechanism ◽  
The Difference ◽  
Protection And Control ◽  
And Control

High voltage circuit breakers are important protection and control equipment for the power grid. The defects and faults of the circuit breaker seriously affect the safety and stability of the power system. As the key component of the operating mechanism of the circuit breaker, the opening/closing coils contain a large amount of information about the operating status of the mechanism. In order to investigate the cause of the difference in the current waveforms, this paper analyzes the factors affecting the circuit breaker opening/closing coil current based on the actual high voltage circuit breaker, and distinguishes the characteristics of the current caused by the environmental difference and Structural difference. At the same time, the characteristics of coil current changes under four different types of mechanism defects are analyzed. These results lay the foundation for status evaluation of high voltage circuit breakers based on opening/closing coil current.

scholarly journals Experimental Study on Splitter Plate for Improving the Dielectric Recovery Strength of Low-Voltage Circuit Breaker

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2148
Author(s):  
Young-Maan Cho ◽  
Kun-A Lee
Keyword(s):  
Distribution System ◽  
Heat Dissipation ◽  
Electrode Materials ◽  
Low Voltage ◽  
Initial Period ◽  
Circuit Breaker ◽  
Splitter Plate ◽  
Voltage Measurement ◽  
Circuit Breakers ◽  
Recovery Voltage

The low-voltage circuit breakers are widely used to protect loads in the distribution system. Interruption reliability of circuit breakers is important because they are a protective device close to the customer. In particular, the re-ignition phenomenon leads to over-current blocking failure due to the arc re-formed between electrodes despite the normal trip of the circuit breaker. In this paper, in order to improve the interruption performance against re-ignition, the dielectric recovery voltage measurement system of the circuit breaker is used and the experiment of changing the splitter plate is carried out. Two experiments are carried out by changing the splitter plate, especially changing the material of splitter plate and the number of lower plates of the splitter plate. In the case of changing the material of the splitter plate, the analysis is conducted according to the thermal conductance. In the case of changing the number of lower plates of the splitter plate, the number of plates and their spacing are variables. Analyzing the results of the dielectric recovery voltage experiment, in the initial period, copper plates have the best value that shows 102.1% improvement compared to normal and Al shows 59.8% improvement compared to normal. These increases are related to the thermal conductivity of the three electrode materials. In the case of changing the number of lower plates of the splitter plate, the 8-plates and 9-plates show 84.5% and 36.1% increases compared to normal, respectively, in the initial period. It can be seen that too many plates interfere with heat dissipation. Since this study studies performance improvement during the initial period, there is not much difference in the later period. This is consistent with the experimental results. In this study, an experimental basis is provided for the dielectric recovery strength from a low-voltage circuit breaker. It is expected that this will contribute to the research to improve the dielectric recovery capability of the circuit breaker.

scholarly journals Solid-State DC Circuit Breakers and their Comparison in Modular Multilevel Converter Based-HVDC Transmission System

Electronics ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1204
Author(s):  
Gul Ahmad Ludin ◽  
Mohammad Amin Amin ◽  
Hidehito Matayoshi ◽  
Shriram S. Rangarajan ◽  
Ashraf M. Hemeida ◽  
...  
Keyword(s):  
Solid State ◽  
High Voltage ◽  
Direct Current ◽  
Circuit Breaker ◽  
Transmission System ◽  
Simulation Software ◽  
Fault Current ◽  
Circuit Breakers ◽  
Hvdc Transmission ◽  
Dc Circuit Breakers

This paper proposes a new and surge-less solid-state direct current (DC) circuit breaker in a high-voltage direct current (HVDC) transmission system to clear the short-circuit fault. The main purpose is the fast interruption and surge-voltage and over-current suppression capability analysis of the breaker during the fault. The breaker is equipped with series insulated-gate bipolar transistor (IGBT) switches to mitigate the stress of high voltage on the switches. Instead of conventional metal oxide varistor (MOV), the resistance–capacitance freewheeling diodes branch is used to bypass the high fault current and repress the over-voltage across the circuit breaker. The topology and different operation modes of the proposed breaker are discussed. In addition, to verify the effectiveness of the proposed circuit breaker, it is compared with two other types of surge-less solid-state DC circuit breakers in terms of surge-voltage and over-current suppression. For this purpose, MATLAB Simulink simulation software is used. The system is designed for the transmission of 20 MW power over a 120 km distance where the voltage of the transmission line is 220 kV. The results show that the fault current is interrupted in a very short time and the surge-voltage and over-current across the proposed breaker are considerably reduced compared to other topologies.

Remote Wireless Network Monitoring Application System

2012 ◽  
Vol 433-440 ◽  
pp. 7024-7028
Author(s):  
Hui Fu ◽  
Bin Jin ◽  
Lin Han ◽  
Zuo Tang Tao
Keyword(s):  
Wireless Network ◽  
Remote Monitoring ◽  
Rapid Development ◽  
Self Monitoring ◽  
Information Display ◽  
Remote Monitoring System ◽  
Encrypt Data ◽  
And Control ◽  
Embedded Applications ◽  
Monitoring Application

With computer technology, communication technology and the rapid development of electronic technology, remote monitoring technology will be more widely used for data transmission requirements and more stringent. GPRS-based remote monitoring system, which is based in communications equipment, through the server to PC, as the remote control platform, embedded applications, network programming and other technology, the remote information display and control. Throughout the system, users can allow each terminal in the case of permission to accept the data on the changes and settings. Wireless network communication is important that the network transmission of data security and consistency, to solve this problem this thesis, performance of network communications software technology to achieve self-monitoring and self-recovery, while use of end to end encryption to encrypt data on the transmission , which can guarantee data reliability, completeness, real time and security.

Design of Solar-Wind Complementary Grid-Connected Power Generation Monitoring System for Teaching

2011 ◽  
Vol 383-390 ◽  
pp. 3628-3632
Author(s):  
Rong Xia Sun ◽  
Jian Li Wang ◽  
Pan Pan Huang ◽  
Jian Kang ◽  
Xiao Feng Chen ◽  
...  
Keyword(s):  
Power Generation ◽  
Solar Wind ◽  
Monitoring System ◽  
Experimental Teaching ◽  
Hardware System ◽  
New Energy ◽  
Power Enterprise ◽  
Field Device ◽  
And Control ◽  
Monitoring Application

With the development of new energy industry, the technicians in the area of solar-wind complementary grid-connected power generation are urgently needed. For this reason, the monitoring system of 10kW solar-wind complementary grid-connected power generation was designed. Hardware system includes field device, communication network and monitoring host. Software design includes operation monitoring, application analysis, video surveillance, information issuing. It realizes functions of supervise and control, equipment events and alarm, report forms and print, energy management and forecasting, remote monitoring and so on. This research can be used to demonstrate experimental teaching in high shool and train power enterprise technicians.

Overview of Path-Planning and Obstacle Avoidance Algorithms for UAVs: A Comparative Study

2018 ◽  
Vol 06 (02) ◽  
pp. 95-118 ◽  
Author(s):  
Mohammadreza Radmanesh ◽  
Manish Kumar ◽  
Paul H. Guentert ◽  
Mohammad Sarim
Keyword(s):  
Path Planning ◽  
Comparative Study ◽  
Operating Conditions ◽  
Computational Time ◽  
Safe Operation ◽  
Sense And Avoid ◽  
Planning Algorithms ◽  
And Control ◽  
Global And Local ◽  
Further Development

Unmanned aerial vehicles (UAVs) have recently attracted the attention of researchers due to their numerous potential civilian applications. However, current robot navigation technologies need further development for efficient application to various scenarios. One key issue is the “Sense and Avoid” capability, currently of immense interest to researchers. Such a capability is required for safe operation of UAVs in civilian domain. For autonomous decision making and control of UAVs, several path-planning and navigation algorithms have been proposed. This is a challenging task to be carried out in a 3D environment, especially while accounting for sensor noise, uncertainties in operating conditions, and real-time applicability. Heuristic and non-heuristic or exact techniques are the two solution methodologies that categorize path-planning algorithms. The aim of this paper is to carry out a comprehensive and comparative study of existing UAV path-planning algorithms for both methods. Three different obstacle scenarios test the performance of each algorithm. We have compared the computational time and solution optimality, and tested each algorithm with variations in the availability of global and local obstacle information.

scholarly journals Assessments and Control of Anthropogenic Noise Pollution in Students’ Residential Areas in Ogbomoso

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
A. O. Ajayeoba
Keyword(s):  
Medical History ◽  
Undergraduate Students ◽  
Circuit Breaker ◽  
Noise Pollution ◽  
Sound Level ◽  
Anthropogenic Sources ◽  
Anthropogenic Noise ◽  
Residential Areas ◽  
Sound System ◽  
And Control

Increased rate of noise-associated risk factors such as speech interference and reduction in productivity, necessitated that control and regulation measures be put in place, to contain anthropogenic noise pollution in the students’ hostels. Therefore, this study assessed the various anthropogenic sources of noise pollution in students’ hostels and developed a Sound Level Monitor and Control (SLMC) device. 1250 undergraduate students across 5 students’ residential zones were sampled for demographics and investigations were conducted into respondents’ perceived medical history, identification of noise sources, and evaluation of hearing loss. Effects of noise levels were evaluated using 100 respondents’ rooms per zone following standard procedures, considering Sound-System-Only (SSO), Generators-Only (GO), and combination of Sound-System-and-Generator (SSG), loud-conversations, etc., as sources of noise. However, a noise control device incorporated with a circuit breaker was developed. The respondents were 51.2% male and 48.8% female, with 58% in the age range 18 – 27 years. The medical history showed that 1.2 and 6.4% had a hearing problem in short and long times, respectively, while 43.6% affirmed that SSO was a major noise pollution causal factor. SSO, GO, loud conversations, traffic, and grinding machines were identified as the prominent sources of anthropogenic induced noise. The minimum average SL result gave a value of 62.8400dB for both ventilated and unventilated rooms, which is 14% above 55dB threshold value recommended by the National Environmental Standards and Regulations Enforcement Agency. The developed SLMC device gave notification at the SL above 55dB for 15 seconds before disconnecting the sound system if not regulated.

scholarly journals Development of a Method and Algorithm for Inhibiting an Automatic Transfer Switch of the Circuit Breaker for a Sustained Short-Circuit

2020 ◽  
Vol 220 ◽  
pp. 01011
Author(s):  
Igor Nikolaevich Fomin ◽  
Roman Pavlovich Belikov ◽  
Tatyana Anatolyevna Kudinova ◽  
Nailya Kamilevna Miftakhova
Keyword(s):  
Short Circuit ◽  
Circuit Breaker ◽  
Electrical Equipment ◽  
Ring Network ◽  
Circuit Breakers ◽  
Emergency Situations ◽  
Short Circuit Currents

Circuit breakers with automatic transfer switches (ATS) are designed in such a way that when the voltage disappears during a short-circuit (SC) in the ring network line, the ATS device is triggered. At the same time, its switch is turned on at short-circuit, then it is turned off with acceleration. Even a shortterm switching on of the automatic transfer switch for a sustained short-circuit leads to emergency situations [1,2]. The electrical equipment of the ring network spare line is exposed to high emergency short-circuit currents, and the consumers powered by the spare transformer are turned off. It is possible to minimize and eliminate the damages caused by the above mentioned cases by inhibiting the switching on of the circuitbreaker of the automatic transfer switch.

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