A measurement method of high DC voltage

Wang, Guizhen; Jia, Qiuting; Cao, Gang

doi:10.1109/eeesym.2012.6258576

Cited by 4 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Common examples are the AMC1001 fully differential isolation amplifier [13] and isolated sigma-delta ADCs such as AD7403-EP [14]. However, Wang et al [15] in their study utilized an AD978 in isolating their voltage measurement system from the HVDC source. While the AD978 does not provide full galvanic isolation between the two systems, it utilizes different voltage sources for operating analog and digital signals and completely converts the analog input to its digital equivalent before transmitting it to the low-voltage measurement system, thus, offering some levels of common mode rejection.…”

Section: Analog Isolator Icsmentioning

confidence: 99%

A Low-cost Optocoupler-Based Isolator System for IoT-Based Voltage Measurement in Low and High voltage DC Applications

Agunloye

2023

Afr. Sci. Rep.

View full text Add to dashboard Cite

Internet of things (IoT) connected devices operate at extremely low voltages that are susceptible to common-mode noise and electromagnetic interference. As a result of this, integrating IoT devices with low or high-voltage direct current power sources requires galvanic isolation which is often expensive to attain. In this work, the use of a low-cost conventional optocoupler (4N35) in the galvanic isolation of an IoT voltmeter required to measure the potential difference of a low voltage direct current source with a maximum relative error of 1% was investigated and experimentally verified. The proposed isolator circuit was first simulated using NI Multism and then fabricated on a printed circuit board for experimental verification after satisfactory simulation results. Measurement results from the experimental verification process were used to fit quadratic and cubic regression equations that approximate the input signal voltage from the isolator’s output voltage measured by the IoT voltmeter. Lastly, the isolator and IoT voltmeter were connected to a variable 100-1000 VDC source via a potential divider network for performance verification at a voltage step of 100 VDC. Here, the isolator successfully achieved its primary goal of providing galvanic isolation between the voltage source and the IoT voltmeter while maintaining a maximum relative error of 1%.

show abstract

Section: Analog Isolator Icsmentioning

confidence: 99%

A Low-cost Optocoupler-Based Isolator System for IoT-Based Voltage Measurement in Low and High voltage DC Applications

Agunloye

2023

Afr. Sci. Rep.

View full text Add to dashboard Cite

show abstract

“…II. DESIGN CONSIDERATIONS Using a voltage divider circuit with linear optocouplers is considered the most fundamental high DC voltage monitoring technique [4]. Most of the microcontrollers work on 3.3V or 5V, where the analogue-to-digital converter (ADC) maximum input is much lower than the voltage needed to be measured.…”

Section: Introductionmentioning

confidence: 99%

A LoRaWAN Based Solar PV Condition Monitoring System

Qian

Thinesh

Ayyalusamy

et al. 2022

2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)

View full text Add to dashboard Cite

This paper presents the design and performance of a low-cost, low-power remote condition monitoring (CM) solution for large-scale solar photovoltaic (PV) systems. The developed CM solution utilises ESP-NOW and Long Range Wide Area Network (LoRaWAN) wireless communication protocols for data exchanges. The developed solution operates in selfpower mode, with each IoT node capable of monitoring up to 16 channels of voltage, current, and temperature of the PV panels. The 2.4GHz ESP-NOW wireless communication protocol is used for data transfer between the IoT nodes in a many-toone configuration. The transceiver node stores messages from all IoT nodes and broadcasts them via the LoRaWAN network to the server. The developed hardware and software solutions were tested to measure the accuracy and reliability of the CM system. As a result, a fully-functioning low-cost solar PV CM system is developed, with an overall sensor measurement error of less than 3%, with an average Received Signal Strength Indicator (RSSI) of -105dBm in non-line-of-sight conditions.

show abstract