scholarly journals Low-Cost Resistivity Meter for Groundwater Exploration Using High Voltage Experimentations

2019 ◽  
Vol 10 (3) ◽  
pp. 35-39
Author(s):  
Mirza Naseer Ahmad ◽  
Farhat Iqbal ◽  
Saad Maqbool ◽  
M Bilal Arshad
Keyword(s):  
High Voltage ◽  
Local Community ◽  
Low Cost ◽  
Low Frequency ◽  
Groundwater Exploration ◽  
Time Loss ◽  
High Voltage Direct Current ◽  
The Earth ◽  
Resistivity Meter ◽  
Multiplier Circuit

26 March, 2018 Accepted: 17 September, 2019Abstract: Resistivity survey is very well known for the exploration of groundwater and to determine the depth ofbedrock. Generally, in Pakistan local drillers rarely use resistivity meter due to high cost of commercially availableequipment. Therefore, most of the wells for groundwater are drilled without any feasibility survey, which causeseconomic and time loss. An inexpensive resistivity meter has been developed that can help the local community toconduct a survey for groundwater. This designed equipment is handy, portable, easy to operate and can bemanufactured locally. This equipment costs 500 US Dollars (USD), whereas commercially available equipment costs2500 to 50000 USD. The designed portable device comprises of a 12V DC battery, an inverter, multiplier circuit,DPDT switch and electrodes. A 12V DC battery is fed to an inverter to achieve AC supply of 220V. The achieved ACvoltage is rectified to DC-voltage which is further enhanced up-to 1300 volts using voltage multiplier circuit. This highDC voltage is called High Voltage Direct Current (HVDC). HVDC is switched at very low frequency of 1Hz.Automatic switching is being accomplished by means of DPDT relay and its control circuitry. HVDC at low frequencyis applied to the earth through electrodes to determine resistivity for different materials lying inside the ground with apenetration depth of 100 meters. This portable instrument would be useful to map surface lithological layers, determinequality of groundwater and bedrock level in accurate and inexpensive way.

scholarly journals Low-Cost Resistivity Meter for Groundwater Exploration Using High Voltage Experimentations

2019 ◽  
Vol 10 (3) ◽  
pp. 35-39
Author(s):  
Mirza Naseer Ahmad ◽  
Farhat Iqbal ◽  
Saad Maqbool ◽  
M Bilal Arshad
Keyword(s):  
High Voltage ◽  
Local Community ◽  
Low Cost ◽  
Low Frequency ◽  
Groundwater Exploration ◽  
Time Loss ◽  
High Voltage Direct Current ◽  
The Earth ◽  
Resistivity Meter ◽  
Multiplier Circuit

26 March, 2018 Accepted: 17 September, 2019Abstract: Resistivity survey is very well known for the exploration of groundwater and to determine the depth ofbedrock. Generally, in Pakistan local drillers rarely use resistivity meter due to high cost of commercially availableequipment. Therefore, most of the wells for groundwater are drilled without any feasibility survey, which causeseconomic and time loss. An inexpensive resistivity meter has been developed that can help the local community toconduct a survey for groundwater. This designed equipment is handy, portable, easy to operate and can bemanufactured locally. This equipment costs 500 US Dollars (USD), whereas commercially available equipment costs2500 to 50000 USD. The designed portable device comprises of a 12V DC battery, an inverter, multiplier circuit,DPDT switch and electrodes. A 12V DC battery is fed to an inverter to achieve AC supply of 220V. The achieved ACvoltage is rectified to DC-voltage which is further enhanced up-to 1300 volts using voltage multiplier circuit. This highDC voltage is called High Voltage Direct Current (HVDC). HVDC is switched at very low frequency of 1Hz.Automatic switching is being accomplished by means of DPDT relay and its control circuitry. HVDC at low frequencyis applied to the earth through electrodes to determine resistivity for different materials lying inside the ground with apenetration depth of 100 meters. This portable instrument would be useful to map surface lithological layers, determinequality of groundwater and bedrock level in accurate and inexpensive way.

scholarly journals DESIGN AND CONSTRUCTION OF A LOW-COST 30KV VARIABLE DC POWER SUPPLY UNIT

2020 ◽  
pp. 3666-3673
Author(s):  
Bolarinwa H.S. ◽  
Fajingbesi F.E. ◽  
Yusuf A. ◽  
Animasahun L. O. ◽  
Babatunde Y. O.
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Low Voltage ◽  
High Reliability ◽  
Low Cost ◽  
Scientific Data ◽  
High Voltage Power Supply ◽  
Technology Application ◽  
High Voltage Direct Current ◽  
Current Voltage

A high voltage power supply is a key component in the advancement of science and technology. Application of high voltage power supply requires careful attention to critical variables such as voltage ripple, long and shortterm stability, repeatability and accuracy. These are important factors in the consideration of reliable scientific data. This paper presents the design of a low-cost high voltage power supply from the off-the-shelf electronics components to meet the high-end requirement of high voltage power supply. A 30kV, 63.8mA maximum power supply was constructed at the Fountain University electronics workshop. This high voltage directs current (HVDC) power supply was built around three basic compartments that include an adjustable low voltage power supply (LVPS), a high frequency oscillator, and a line output transformer (LOPT) using flyback transformer, NE555timer, BU508D BJT, and other off-the-shelf components. The current-voltage relationship at the output of the constructed High Voltage Direct Current was found to be linear. This power source will serve any high DC voltage applications such as electrospinning. The constructed 30kV power supply has been tested in the electrospinning laboratory of the Center for Energy Research and Development (CERD) Obafemi Awolowo University (OAU) Ile-Ife. The unit successfully electrospun Zinc-Titaninm polymeric solution into fibers at about 8 kV. The importance of this fabricated device is its high reliability despite its low cost and capability to produce different magnitude of high voltage DC.

scholarly journals Low-Cost Automotive Capacitive Discharge Ignition (CDI) Coil for Low Frequency Ozone Generator

2019 ◽  
Vol 11 (3) ◽  
pp. 80-87
Author(s):  
Muhammad Ikhsan Sani
Keyword(s):  
High Voltage ◽  
Amplification Factor ◽  
Low Cost ◽  
Colorimetric Method ◽  
Low Frequency ◽  
Ozone Production ◽  
Capacitive Discharge ◽  
Discharge Ignition ◽  
Circuit Function ◽  
40 Hz

This paper presents an alternative solution for generating ozone using a low-cost automotive Capacitive Discharge Ignition (CDI) coil. High voltage ozone generating theory is implemented using a capacitive discharge circuit that uses ignition coil as its high voltage step-up transformer. A computer simulation has been performed to confirm the validity of the circuit function. By calculation and measurement, the coil has 196,71 voltage amplification factor. Furthermore, it has been implemented at a low frequency of about 10 - 40 Hz. Meanwhile, ozone output is measured using the colorimetric method. From a series of tests, that coil implementation has successfully generated a high voltage on ozone reactor tube at 31.47 kV voltages that essential for ozone production. Change of frequency will change the ozone concentration output linearly. The test was conducted using three different frequency: 10 Hz, 20 Hz, and 40 Hz. The result has shown that the highest ozone yield was 80 mg/hour.

The Application Research of HVDC & FACTS to Suppress the Power System Low-Frequency Oscillation

2014 ◽  
Vol 704 ◽  
pp. 190-194 ◽  
Author(s):  
Min Wang ◽  
Dan Zhen Gu
Keyword(s):  
High Voltage ◽  
Controller Design ◽  
Low Frequency ◽  
Low Frequency Oscillation ◽  
Design And Optimization ◽  
Flexible Ac Transmission ◽  
High Voltage Direct Current ◽  
Flexible Ac Transmission System ◽  
Facts Devices ◽  
Ac Transmission

With the widely application use of UHV（ultra- high- voltage） transmission，increased the system low frequency oscillations，and flexible application of high-voltage direct current transmission (HVDC) and flexible ac transmission system (FACTS) can improve the system damping oscillation inhibition. This paper Based on the research results in recent years, classify& summarize HVDC and FACTS devices the theoretical basis and the main application places, and according to the way of access system of parallel, series and parallel hybrid FACTS devices stable controller design and optimization are summarized and classified.

scholarly journals A Study on Directly Interconnected Offshore Wind Systems during Wind Gust Conditions

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 168
Author(s):  
Cathal W. O’Donnell ◽  
Mahdi Ebrahimi Salari ◽  
Daniel J. Toal
Keyword(s):  
High Voltage ◽  
Wind Farm ◽  
Low Frequency ◽  
Alternating Current ◽  
Offshore Wind ◽  
Wind Gust ◽  
Interconnected System ◽  
High Voltage Direct Current ◽  
Wind Generators ◽  
Wind Gusts

An investigation of the effects of wind gusts on the directly interconnected wind generators is reported, and techniques toward the mitigation of the wind gust negative influences have been proposed. Using a directly interconnected system approach, wind turbine generators are connected to a single synchronous bus or collection grid without the use of power converters on each turbine. This bus can then be transformed for transmission onshore using High Voltage Alternating Current, Low-Frequency Alternating Current or High Voltage Direct Current techniques with shared power conversion resources onshore connecting the farm to the grid. Analysis of the potential for instability in transient conditions on the wind farm, for example, caused by wind gusts is the subject of this paper. Gust magnitude and rise time/fall time are investigated. Using pitch control and the natural damping of the high inertial offshore system, satisfactory overall system performance and stability can be achieved during these periods of transience.

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