The Study on Intelligent Insecticidal Lamp with LED

2014 ◽  
Vol 571-572 ◽  
pp. 985-989
Author(s):  
Xiao Dong Zhang ◽  
Li Feng Xing
Keyword(s):  
Data Acquisition ◽  
High Voltage ◽  
Power Supply ◽  
Power Grid ◽  
Solar Battery

Intelligent insecticidal lamp with LED is more efficient than ordinary insecticidal lamp. It used solar battery as the power supply, used high voltage power grid as hunting tools, used power LED which was controlled by singlechip as trapping tools for killing more insects. It could work at the night in spring or summer by data acquisition of clock chip and sensors and could automatically shut down in the rainy day or foggy day.

scholarly journals Design and Experiment of Dry-Ice Cleaning Mechanical Arm for Insulators in Substation

2020 ◽  
Vol 10 (7) ◽  
pp. 2461 ◽  
Author(s):  
Shufeng Tang ◽  
Pengfei Zhou ◽  
Xu Wang ◽  
Yue Yu ◽  
Hualei Li
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Power Grid ◽  
Important Application ◽  
Strength Analysis ◽  
Dry Ice ◽  
Actual Operation ◽  
High Voltage Insulation ◽  
Operation Environment ◽  
And Control

Polluted flashover of insulators has always been a crucial hidden peril to the reliability of substation for supplying electricity. At present, the insulator of the substation is mainly cleaned manually in the case of power-cut, which greatly affects the reliability of power supply and operation safety. In this paper, an insulator dry-ice mechanical arm capable of electrified working is proposed. Under the regular operation of the power grid, the operator can remotely control the mechanical arm to clean the insulators of the substation with high-pressure gas mixed with dry-ice particles. This will not only ensure the regular operation of the power grid, but also greatly protects the safety of personnel. Considering the operation environment and high-voltage working conditions of the substation, the mechanism and control system of the dry-ice cleaning mechanical arm are designed, and the motion analysis, simulation, and strength analysis of the mechanical arm are carried out. Finally, the high-voltage-insulation test of the mechanical arm and the actual operation of the substation insulator cleaning working test are carried out, which proves that this mechanical arm can adapt to the operation environment of the substation, and the working is stable, safe, and reliable, which has an important application value to solve the problem in the cleaning of the substation insulator and other electrified equipment.

Research of Adaptive Line Selection Leakage Protection Based on DSP in Mine

2011 ◽  
Vol 143-144 ◽  
pp. 14-18
Author(s):  
Dan Xu ◽  
Zhan Zhang
Keyword(s):  
High Voltage ◽  
Coal Mine ◽  
Power Supply ◽  
Power Grid ◽  
Protection System ◽  
Direct Power ◽  
Supply Condition ◽  
Line Selection ◽  
Phase Sensitive

In view of the present our country coal mine high-voltage power grid widely used 6kV or 10kV cable direct power supply condition. To describe a DSP-based adaptive line selection leakage protection program of high-voltage power grid. It adopts under-compensation, adaptive random tuning and phase-sensitive comparison to judge the fault branch and achieve selective leakage protection, and make the protection system more perfect and reliable.

Study on Preventing Override Trip System for High-Voltage Power Grid of Coal Mine Underground Based on the EtherCAT

2013 ◽  
Vol 273 ◽  
pp. 389-393
Author(s):  
Yu Mei Wang ◽  
Xu Yang ◽  
Hao Zhang
Keyword(s):  
High Voltage ◽  
Coal Mine ◽  
Power Supply ◽  
Power Supply System ◽  
Short Circuit ◽  
Power Grid ◽  
Supply System ◽  
Quality Requirements ◽  
Master Station ◽  
Short Circuit Fault

When the power supply system for coal mine underground take place a short circuit fault, multilevel switch often respond at the same time. And the existing comprehensive protector cannot satisfy the real-time and rapid quality requirements of preventing override trip system for high-voltage power grid of coal mine underground. So this paper put forward the research for comprehensive protector of preventing override trip based on the EtherCAT. This paper first analyzes the principle and characteristics of the EtherCAT technology; and then puts forward the overall scheme of preventing override trip system; Finally, study and design the slave station and master station of preventing override trip system based on the EtherCAT.

scholarly journals Mathematical modeling of a system for monitoring the insulation resistance of a high-voltage power grid of a hybrid vehicle

2021 ◽  
Vol 1 (1) ◽  
pp. 89-98
Author(s):  
A.N. Malyshev ◽  
◽  
YE.A. Grunenkov ◽  
V.V. Debelov ◽  
V.N. Kozlovskiy ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Monitoring System ◽  
High Voltage ◽  
Power Supply ◽  
Power Grid ◽  
Hybrid Vehicle ◽  
Insulation Resistance ◽  
Insulation Monitoring ◽  
Hardware Complex ◽  
Software And Hardware

The paper presents mathematical models and computational and analytical dependences, which make it possible to implement a system for monitoring the insulation resistance of a high-voltage power grid of a hybrid vehicle and make it possible to formulate requirements for the physical and simulation model of the software and hardware complex of laboratory tests. The purpose of the work is to determine the main functions and characteristics of the insulation monitoring system, its features, the principle of operation and methods of monitoring the insulation resistance, drawing up requirements for the simulation system. The introduction justifies the importance of monitoring in-sulation resistance and provides references to standards that regulate the requirements for the meas-urement and determination of mains failure. The block diagram of the vehicle power supply and the role of the insulation resistance monitoring system in this diagram are presented, the features of in-sulation monitoring are explained. The principle of operation of the insulation monitoring system and the use of the most common schemes are considered. The calculated dependencies for each of the presented schemes are given. These allow calculating the insulation resistance. The procedure for measuring the insulation resistance according to the ISO standard is described and the corre-sponding equations are given. For the presented circuit, a graph that explains the principle of the system's operation, when one of the keys is closed, the voltage across the measuring resistor changes with the normal insulation state of the positive and negative power supply bus of the high-voltage system is given. The conclusions provide a generalization of the presented mathematical model and formulate the requirements for the software and hardware complex, which allows simulation and mathematical modeling of electrical systems and their components in various operating modes. The paper explains the features of the software and hardware complex that allows to simulate changes in the insulation resistance and faults of the high-voltage power supply network for a vehicle with a hybrid power plant.

Research of LED Solar Insecticides Lamp

2014 ◽  
Vol 1079-1080 ◽  
pp. 562-565
Author(s):  
Zhen Dong Li
Keyword(s):  
Energy Saving ◽  
Environmental Protection ◽  
Human Nature ◽  
High Voltage ◽  
Power Supply ◽  
Large Area ◽  
Clear Night ◽  
Adverse Weather ◽  
Solar Battery ◽  
Train Of Thought

In this paper, we design a modified insecticides lamp, LED the device by using solar battery as a power supply, high voltage power grid as a hunting tool, through the MCU drive different wavelength of LED strobe. Compared with ordinary insecticides lamp insecticide effect, improved the LED insecticides lamp peculiar four-color stroboscopic technology can be more traps in pests. By sampling clock chip and humidity sensitive resistor, the device will automatically work in spring and summer clear night, met YinYuXue fog and other adverse weather will automatically shut down. The device can be applied to farmland, orchards and other places of a large area of farming, and human nature, energy saving, environmental protection, for the development of LED insecticides lamp provides a new train of thought.

Study on Selective Leakage Protection System of Mine High Voltage Grid Based on Harmonic Phase Comparison

2015 ◽  
Vol 9 (1) ◽  
pp. 253-262
Author(s):  
Liu Zhongfu ◽  
Zhang Junxing ◽  
Shi Lixin ◽  
Yang Yaning
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Neutral Point ◽  
Arc Suppression Coil ◽  
Zero Sequence ◽  
Harmonic Extraction ◽  
Power Direction ◽  
The Stability

As for the wide application of arc suppression coil to the grounding in neutral point of mine high voltage grid, grid leakage fault rules and harmonic characteristics of the neutral point grounding system through arc suppression coil are analyzed, the selective leakage protection program “zero-sequence voltage starts, fifth harmonics of grid zerosequence voltage and zero-sequence current are extracted for phase comparison” is proposed, and corresponding fifth harmonic extraction circuit and power direction discrimination circuit are designed. The experimental results show that the protective principle applies not only to the neutral point insulated power supply system, but also to the power supply system in which neutral point passes arc suppression coil, which can solve selective leakage protection problems under different neutral grounding ways, improving the reliability of selective leakage and guaranteeing the stability of the action value.

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