HARMONICS OVER POWER LINES MEASUREMENT : Algorithm in C and testing environment
Alvarez Iglesias, Luis (2015)
Alvarez Iglesias, Luis
Vaasan ammattikorkeakoulu
2015
Creative Commons Attribution-NonCommercial 3.0 Unported
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2015102315675
https://urn.fi/URN:NBN:fi:amk-2015102315675
Tiivistelmä
This paper is intended to give an overview of measuring harmonic phenomena over the neutral line in 3-phase 4-wire substation network when an earth fault is originated. It requires electrical and microcontroller interfacing background, but little knowledge of harmonics.
The company VASPEC Oy sponsors the research and belongs to a project owned by the same company to develop a reliable earth fault detection and location device. Is based on Seppo Pettissalo’s original idea, and the result of the collaboration of the named person and company together with VAMK and Technobotnia laboratories during the last quarter of the year 2014.
The paper offers a solution to the need of a software algorithm in C language to measure transients and rms currents over the 3 phases, and fundamental, 3rd, 5th and 7th harmonic currents over the neutral line in 3-Phase 4-wire configuration. Store and transmit the information altogether with the event’s timestamp given by a real-time clock. It includes hardware, software and a testing environment solution.
An approach to the use of a Renesas RX63N microcontroller, interfacing an ADC and an ADE7880 energy meter will be discussed in this document and alternative methods are discussed. It will gather the required information providing the values in less than 300 microseconds, process, transmit and serve the lectures to be displayed in a remote terminal in 0.6ms, repeating the process during a time period of 100ms is proved. The testing environment is provided by means of a desktop computer’s soundcard and the use of MATLAB® to generate the fundamental and harmonic waves.
The company VASPEC Oy sponsors the research and belongs to a project owned by the same company to develop a reliable earth fault detection and location device. Is based on Seppo Pettissalo’s original idea, and the result of the collaboration of the named person and company together with VAMK and Technobotnia laboratories during the last quarter of the year 2014.
The paper offers a solution to the need of a software algorithm in C language to measure transients and rms currents over the 3 phases, and fundamental, 3rd, 5th and 7th harmonic currents over the neutral line in 3-Phase 4-wire configuration. Store and transmit the information altogether with the event’s timestamp given by a real-time clock. It includes hardware, software and a testing environment solution.
An approach to the use of a Renesas RX63N microcontroller, interfacing an ADC and an ADE7880 energy meter will be discussed in this document and alternative methods are discussed. It will gather the required information providing the values in less than 300 microseconds, process, transmit and serve the lectures to be displayed in a remote terminal in 0.6ms, repeating the process during a time period of 100ms is proved. The testing environment is provided by means of a desktop computer’s soundcard and the use of MATLAB® to generate the fundamental and harmonic waves.