Advantage of On-Line Partial Discharge continuous monitoring of medium voltage substation

Abstract

On-Line Continuous Partial Discharge measurements of medium voltage substations have not attracted the same attention in the electrical community as compared to similar PD measurements of rotating machines. The cost of an unexpected outage however may be considerably more significant of a main distribution bus than just for a single motor failure. This paper discusses pros and cons of PD measurements using multiple sensors for additional noise reduction and localizing PD activity for measurements made in higher frequency bands. The importance of continuous PD monitoring vs. periodic walk in PD measurements of switchgear is also discussed considering that PD activity in switchgear can have very unstable activity highly dependent on ambient conditions. Negative periodic PD tests in switchgear can result in a false sense of security. Case studies from field experience are presented to support the discussions.

Analisis RC Detector Sebagai Sensor Partial Discharge

“…Deteksi online tidak perlu dimatikan dan dapat menggunakan banyak sensor untuk mengukur PD. Oleh karena itu, deteksi online merupakan pengukuran yang direkomendasikan dalam beberapa tahun terakhir [5][6][7]. Partial Discharge yang terjadi terus menerus dapat menyebabkan kerusakan (breakdown) pada suatu peralatan tegangan tinggi.…”

Investigation of Partial Discharges at the High Voltage Electric Motor Bars

“…On-line continuous PDs measurements of medium voltage substations are the similar as PDs measurements of rotating machines. We can used multiple sensors for additional noise reduction and localizing PD activity for measurements made in higher frequency bands [14]. An experimental investigation of the behaviour of PDs occurring in insulation cavities under influence of different voltage, temperature and electrical field conditions is presented in this paper.…”

Investigation of Partial Discharge Monitoring Techniques for Maintenance Management in Medium Voltage Power Systems

“…Bu sayede uzun süreli kesintilerin ve enerji kalitesindeki bozulmaların önüne geçebilmek mümkündür. [16]'da orta gerilim dağıtım merkezlerinde kısmi deşarj ölçümlerinin avantajları ve dezavantajları tartışılmaktadır. [17]'de orta gerilim metal clad hücrelerde yalıtım durumunun değerlendirilmesini için farklı elektromanyetik kısmi deşarj ölçüm tekniklerinin uygulanmasına ilişkin bir çalışma sunulmaktadır.…”