Partial Discharge Assessment an‎d Location in Three Phase Cross-bonded Cable Networks

1/1/1900 12:00:00 AM

Considering the importance of detecting partial discharge (PD) sources in high-voltage AC cable networks designed with cross-bonded sheaths over long lengths, this thesis eva‎luates an‎d locates PD through online testing in three-phase cable networks with cross-bonded sheaths. A key prerequisite for testing an‎d analyzing PD in cable networks is the identification of all their link-boxes. In this regard, a novel method for circuit finding in buried cable networks is presented in this thesis, utilizing online testing to identify unknown link-boxes. The results of practical experiments conducted in this thesis confirm the efficiency of the proposed method. After the complete identification of the link-boxes in the cable networks, it becomes possible to perform online PD testing on them. The steps for PD analysis presented in this thesis include determining defective cable sections an‎d phases, identifying defective terminations, separating signals, an‎d finally assessment of PD in cable networks with cross-bonded sheaths in the presence of multiple PD sources simultaneously. For the first time in this thesis, methods are introduced for locating PD sources (including identifying defective cable sections an‎d phases as well as detecting defective terminations) an‎d eva‎luating these sources through online testing in three-phase cable networks with cross-bonded sheaths in the presence of multiple PD sources, using the analysis of pulse train signals generated by these sources. The proposed methods have been validated through extensive simulations in the EMTP software, with the results demonstrating their high accuracy an‎d performance.

تخليه جزئي , ارزيابي , مكان يابي , شبكه كابلي , اتصال متقاطع , مداريابي شبكه كابلي

Partial Discharge , Assessment , Location , Cable Network , Cross-bonding , Cable Network Identification

Kian Shahinfar

Seyyed Mohammad Shahrtash - Ahmad Gholami