Detecting topological errors with pre-estimation filtering of bad data in wide-area measurements

Moller, Jakob Glarbo; Sørensen, Mads Peter; Johansson, Hjortur; Østergaard, Jacob

doi:10.1109/ptc.2017.7980940

Cited by 2 publications

(2 citation statements)

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“…The fault zone identification vector FZIV is then obtained by substituting (25) and (26) into (1). The results of FZIV preceding the fault are summarized in Table 1.…”

Section: Fault Zone Identification Vector Preceding the Faultmentioning

confidence: 99%

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Wide area measurements based fault detection and location method for transmission lines

Fan

Liao

2019

Prot Control Mod Power Syst

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Electric power grids are critical infrastructure for delivering energy from generation stations to load centers. To maximize utilization of assets, it is desirable to increase the power transferred over transmission systems. Reliable protection of transmission systems is essential for safeguarding the integrity and reliability of the power grid. Distance protection is the most widely used scheme for protecting transmission lines. Most existing protection systems use local measurements to make a decision while pilot protection is used in some circumstances. Distance protection may fail under stressed operating conditions, which could lead to cascading faults. This paper proposes a system integrity protection scheme by utilizing wide area measurements. The scheme partitions the system into subnetworks or protection zones and employs current measurements to derive a fault identification vector indicating the faulted zone. Then the fault location is pinpointed based on wide area measurements and network data. The proposed method is able to deal with multiple, simultaneous faults, and is applicable to both transposed and untransposed lines. Evaluation studies based on simulation studies are presented.

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“…The fault zone identification vector FZIV is then obtained by substituting (25) and (26) into (1). The results of FZIV preceding the fault are summarized in Table 1.…”

Section: Fault Zone Identification Vector Preceding the Faultmentioning

confidence: 99%

“…Moreover, the wide area measurements need to be accurate in order to locate the fault. The authors of [26] describe a technique to detect bad wide area measurement by using a pre-estimation filter. In [27], a linear method for identifying measurement errors has been described.…”

Section: Introductionmentioning

confidence: 99%