No Blog Eletrônica de Potência você encontrará informações sobre teses,artigos,seminarios,congressos,tecnologias,cursos,sobre eletrônica potência. “TEMOS O DESTINO QUE MERECEMOS. O NOSSO DESTINO ESTA DE ACORDO COM OS NOSSOS MERITOS” ALBERT EINSTEIN. Imagination is more important than knowledge, for knowledge is limited while imagination embraces the entire world. EL FUTURO SE CONSTRUYE HOY,EL SUCESSO NO ES FRUTO DE LA CASUALIDAD,SE HUMILDE ,APRENDE SIEMPRE CADA DIA.
AUTOR DO BLOG ENG.ARMANDO CAVERO MIRANDA SÃO PAULO BRASIL
"OBRIGADO DEUS PELA VIDA,PELA MINHA FAMILIA,PELO TRABALHO,PELO PÃO DE CADA DIA,PROTEGENOS DO MAL"
“SE SEUS PROJETOS FOREM PARA UM ANO,SEMEIE O GRÂO.SE FOREM PARA DEZ ANOS,PLANTE UMA ÁRVORE.SE FOREM PARA CEM ANOS,EDUQUE O POVO.”
“Sixty years ago I knew everything; now I know nothing; education is a progressive discovery of our own ignorance. Will Durant”
domingo, 4 de janeiro de 2015
The Price of Poor Power Quality Ian C Evans, Harmonic Solutions Co. UK and Michael J Richards, Algozen Corporation, Canada
The Price of Poor Power Quality
Ian C Evans, Harmonic Solutions Co. UK and Michael J Richards, Algozen Corporation, Canada
Abstract
Electric drives, both DC drives (often called “SCR drives” in the industry) and AC variable frequency drives (VFDs), are commonplace on drilling rigs and offshore installations. Their operation can significantly degrade the quality of electric power, resulting in loss of operational capability, equipment failure with subsequent down-time in addition to presenting safety concerns. Marine classification bodies have rules to limit harmonic voltage distortion but these are rarely policed. The quality and security of electric power are absolutely crucial to the operational integrity of any drilling rig or offshore installation, irrespective of type or class. Any failure or malfunction of equipment due to poor power quality can result in severe or disastrous consequences. This paper looks at the main problems associated with poor power quality, including excessive harmonic voltage distortion, line notching (SCR drives) and voltage spikes attributed to SCR drives; these are all traditional ‘harmonics problems’. However, the introduction of large VFDs has resulted in significant increases in ‘common mode voltage’ problems which can be extremely problematic; even to the point where rigs are being taken off-hire due to major equipment being deemed ‘dangerous’. On another rig, the gas detection system failed when the top drive VFD was running due to this problem. This paper will provide a practical understanding of each problem and how they can be resolved. The paper also introduces an inexpensive, yet powerful, remote power quality monitoring system which can be easily retrofitted to monitor all aspects of land-rig and offshore rig power quality, including waveforms and harmonic spectrums. The data is available locally with the capability to transmit the information via the internet to anywhere in the World.
LINK FULL PAPER ORIGINAL
https://www.google.com.br/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0CC4QFjAC&url=http%3A%2F%2Fwww.aade.org%2Fapp%2Fdownload%2F6857647004%2FAADE-11-NTCE-07.pdf&ei=QnSpVKLzJdOTNtLxgogH&usg=AFQjCNHm05m6r6W9vVUSJZlCLLT4ATHEkQ&sig2=DuFagJEuZCRiGxGxUUqrig
LINK ALTERNATIVE
https://copy.com/fyS9nLkVUXPffmPB
Assinar:
Postar comentários (Atom)
Nenhum comentário:
Postar um comentário