Partial discharges field tests in a 230kV circuit breaker

Bacega, Wilson Roberto; Bacega, Felippe; Tatizawa, Hédio; Castro, Adrian F.; Bottaro, Marcio; Rosendo, Danilo C.; Bassi, Welson

doi:10.1109/eurocon.2017.8011135

Cited by 1 publication

(2 citation statements)

References 7 publications

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“…As mentioned, trip coil, latch mechanism, auxiliary contacts, and overall condition of CB depends on (WI 2 , WI 3 , WI 4 ), (WI 2 , WI 3 ), (WI 5 , WI 6 ), and (WI 2 , WI 3 , WI 4 , WI 5 , WI 6 ), respectively. After implementation of SEDMA, first, the priority assessment of each CB against other CBs will be achieved, according to equations (15) and (16). Figure 8 shows the results of assessment for trip coil, latch mechanism, auxiliary contacts and overall condition of CB.…”

Section: Maintenance Priority Determinationmentioning

confidence: 99%

“…According to Zhang et al [15], about 54% of major failures and 49% of minor failures are related to mechanical characteristics. (iii) Insulation characteristics, such as insulation resistance (insulation dissipation factor), SF 6 gas density for SF 6 CBs, oil level and oil quality, partial discharge (using high-frequency current transformers (HFCTs) and estimating the intensity of the partial discharge [16]). (iv) Miscellaneous, such as operating environment, maintenance data, and operating age.…”

Section: Introductionmentioning

confidence: 99%

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Prioritizing CBs Maintenance and Identifying Mandatory Maintenance at Higher Priorities

Aranizadeh

Shahrtash

Gholami

2022

International Transactions on Electrical Energy Systems

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Preventive maintenance (PM) based on condition monitoring of circuit breakers (CBs) provides proper and timely maintenance of CBs and reduces their failure rate as well as network costs. Condition monitoring of CB considers functional age (not natural age) of CB. This functional age depends on CB erosion. In this paper, CB condition assessment is obtained by monitoring the coil current and its duty cycles. Then, the maintenance priority between CBs of a power network is achieved using self-evaluation decision-making algorithm (SEDMA). This algorithm works in such a way that both the performance of CB is tracked by itself over time as well as compared to other CBs. First, this means the condition of the CB is measured by itself, and if the condition of the CB deteriorates over time, the CB will be given priority for repair. Second, the CB is compared offline with other CBs, and owing to the CB failures compared to other CBs, the priority of CB repair will be finalized. Then, using sensitivity analysis, it is determined whether the CB with the highest priority needs to be repaired or not, and the failure level of each CB will be specified. The case study in this paper concerns about two similar CBs. Also, the effect of improving the condition of the CB will be determined by performing maintenance operations. Eventually, it will be clear which CB has a higher priority for maintenance and whether this higher priority justifies the need for maintenance or not.

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Section: Maintenance Priority Determinationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%