Minimizing capacitor bank outage time through fault location

Schaefer, Joseph; Samineni, Satish; Labuschagne, Casper; Chase, Steven B.; Hawaz, Dereje Jada

doi:10.1109/cpre.2014.6798995

Cited by 11 publications

(5 citation statements)

References 1 publication

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“…The capabilities and the salient features (C&SFs) of the proposed method and previously published methods in SCB element failure detection are summarised in Table 12. From Table 12, it can be observed that All methods are able to detect the faulty phases. The proposed method and also the methods in [7] possess the C&SFs 2–6 while the methods in [12, 13, 16] are unable to respond correctly to these conditions. C&SFs 7–9 are the unit C&SFs that only the proposed method can deal with them. No discussions have been given in the previously published algorithms regarding these C&SFs.…”

Section: Performance Evaluation Of the Proposed Methodsmentioning

confidence: 99%

“…The proposed method and also the methods in [7] possess the C&SFs 2–6 while the methods in [12, 13, 16] are unable to respond correctly to these conditions.…”

Section: Performance Evaluation Of the Proposed Methodsmentioning

confidence: 99%

“…The second group, which is the main interest of this study, concentrates on the single wye configuration of SCBs and is based on the voltage of the neutral point [12–14]. As mentioned in [15], the calculations of these methods are conducted based on the reference of the phase angle of the neutral point from the phase angle of the positive sequence bus voltage.…”

Section: Introductionmentioning

confidence: 99%

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Multi‐criteria protection scheme for online element failure detection in shunt capacitor banks

Goodarzi

Allahbakhshi

Tajdinian

et al. 2020

IET Generation, Transmission & Distribution

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This paper deals with a fault detection investigation of SCBs, and it is focused on the faulty phase detection and the number of faulty capacitor units. Unlike previous methods, the proposed method provides a relay decision making criterion which determine the faulty capacitors, and the number of capacitor failures in case of multiple faulty phase conditions. The proposed algorithm is applied on different wye configurations of SCBs considering different protection designs (i.e., fuseless, internally and externally fused units). Since the detection of capacitor failures in SCBs are based on the fundamental phasor component, there may occur a significant delay in decision making in the case of an external short circuit fault in the power system. The aforementioned condition, which will be mathematically proven, happens due to a capacitor discharge after fault clearance. To deal with this condition, a method is proposed by applying an algorithm, in which the fundamental component of the voltage signal is extracted in one cycle. Performance evaluations associated with the proposed method are provided for different fault conditions, fault locations, and different levels of harmonics and, they are further discussed through the implementation of the proposed method in MATLAB environment.

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Section: Performance Evaluation Of the Proposed Methodsmentioning

confidence: 99%

“…The proposed method and also the methods in [7] possess the C&SFs 2–6 while the methods in [12, 13, 16] are unable to respond correctly to these conditions.…”

Section: Performance Evaluation Of the Proposed Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multi‐criteria protection scheme for online element failure detection in shunt capacitor banks

Goodarzi

Allahbakhshi

Tajdinian

et al. 2020

IET Generation, Transmission & Distribution

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“…To find the unknown variables in (14), least squares (LS) technique provides fast solution as follows:…”

Section: B Sub-cycle Least Square Techniquementioning

confidence: 99%

Shunt Capacitor Bank Fault Detection and Localization Using Sub-Cycle Algorithm

Tajdinian

Behdani

Goodarzi

et al. 2022

2022 IEEE Electrical Power and Energy Conference (EPEC)

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Fast internal detection and location in Shunt Capacitor Banks (SCBs) can lead to the prevention of damages to other SCBs' elements and consequently avoid undesirable performance and effects in power system operation. This paper targets the performance of phasor-based algorithms of failure detection and fault location of SCBs. Being dependent on the fundamental phasor components which usually are calculated based on the Discrete Fourier Transform (DFT), the failure detection and fault location algorithms suffer from almost onecycle delay. This paper provides sub-cycle phasor estimation based on the least-square technique. The proposed algorithm is evaluated for different configurations of SCBs considering different fuse protection designs. The proposed method provides a criterion for relay decision-making in the case of multiple faulty phases condition. The proposed method is designed to monitor and detect consecutive failures based on the existing data of commercial relays. Performance evaluations are conducted under different circumstances namely voltage unbalance conditions and multiple internal fault locations.

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“…The method used in [20][21] employed the superimposed reactance method considering voltage and current; the results proved that the relay algorithm based on measuring unbalance factors was effective and capable of operating even when faults occurred within a short processing time. Previous studies [22][23][24] have also proposed methods based on unbalance factors for detecting faults in capacitor banks, whereby all types of internally fused capacitor banks were considered. These results reveal that the system connected to the ground should analyze unbalance factors based on the neutral current for the purpose of fault detection.…”

Section: Introductionmentioning

confidence: 99%

Discriminating Between Capacitor Bank Faults and External Faults for an Unbalanced Current Protection Relay Using DWT

Lertwanitrot

Ngaopitakkul

2020

IEEE Access

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Capacitor faults are a common issue in modern-day power systems. Such systems employ a traditional mechanism that solely relies on unbalanced relays as an indicator of faults in capacitor banks; however, in the case of a relay trip, operators may find it difficult to identify the cause of these faults. To address this issue, this study aims to detect and discriminate between faults in the capacitor bank (i.e., internal faults) and those in the transmission line (i.e., external faults) by employing discrete wavelet transform (DWT). For this purpose, simulations were conducted using PSCAD software and modelled according to the 115-kV system from the Electricity Generating Authority of Thailand (EGAT). Furthermore, case studies involving faults with different phases, side and branch connections, row connections, inception angles, and blown fuses were considered. Moreover, the phase current, unbalanced current, and unbalanced voltage were analyzed to elucidate fault behaviors and the variation in the coefficient obtained via DWT; the unbalanced current and unbalanced voltage were used as design criteria for the proposed detection and relay operation algorithm. Real-world signals were employed to verify the accuracy of the proposed model. The results indicate that the proposed algorithm achieves satisfactory accuracy in terms of fault detection and the operation of relays in capacitor banks. The proposed algorithm is expected to enable an improvement in the performance of protection systems for capacitor banks in the near future.

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Minimizing capacitor bank outage time through fault location

Cited by 11 publications

References 1 publication

Multi‐criteria protection scheme for online element failure detection in shunt capacitor banks

Multi‐criteria protection scheme for online element failure detection in shunt capacitor banks

Shunt Capacitor Bank Fault Detection and Localization Using Sub-Cycle Algorithm

Discriminating Between Capacitor Bank Faults and External Faults for an Unbalanced Current Protection Relay Using DWT

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