Developments of Power System Protection and Control

Bo, Zhiqian; Lin, Xin; Wang, Q. P.; Yi, Yang; Zhou, Fu-zhen

doi:10.1186/s41601-016-0012-2

Cited by 69 publications

(24 citation statements)

References 11 publications

(14 reference statements)

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“…The phase current difference of the abrupt phase selection component is a component that judges the fault phase by comparing the relationship between the magnitudes of the abrupt changes of the phase current difference between the two phases [16][17][18][19][20], and the phase current difference mutation amount is defined as:…”

Section: Phase Current Difference Of the Abrupt Phase Selection Compomentioning

confidence: 99%

LS-Solar-PV System Impact on Line Protection

et al. 2019

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Large-scale photovoltaic power station access to the grid will profoundly change the fault current characteristics of the power station’s outgoing lines. This change results in adaptive problems in traditional protection phase selection components, which may cause incorrect actions in reclosing, protection ranging, and distance protection. Based on the fault current characteristics of the large-scale photovoltaic power station transmission line, this paper analyzes the adaptability of the phase current difference mutation and the sequence component phase selection component in protecting the Photovoltaic (PV) power plant side of the transmission line. Based on the fault current analytical formula, the phase relationship between the phase current difference and the current sequence component under different control targets, such as suppressing negative sequence current, suppressing the active power fluctuation, and suppressing the reactive power fluctuation, is derived. The operational performances of the phase–phase current difference of the abrupt phase selection component and the sequence component phase selection component of the power station side are degraded, which may cause incorrect operation of the phase selection component. Based on the actual engineering parameters of a PV power plant, a simulation model was built in Power System Computer Aided Design (PSCAD) to verify the correctness of the theoretical analysis.

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Section: Phase Current Difference Of the Abrupt Phase Selection Compomentioning

confidence: 99%

LS-Solar-PV System Impact on Line Protection

et al. 2019

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“…Equations (10) and (11) ensure that the voltage vector shifts are three-phase balanced. If the power system is in "Balanced Abnormal Status", the calculation of the accumulated phase angle drift will be initiated as Equation (12).…”

Section: Phase Angle Drift Calculation Criterionmentioning

confidence: 99%

A New Passive Islanding Detection Solution Based on Accumulated Phase Angle Drift

Xing

2018

Applied Sciences

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The existing passive methods for islanding detection are mainly based on the detection of voltage and frequency deviation after islanding, using protections such as voltage vector shift (VVS) and rate of change of frequency (ROCOF). Although there are reported issues with these passive methods such as inherent non-detection zones and nuisance trips, utilities prefer the passive methods due to the low cost and simplicity of deployment. In this paper, one composite passive islanding detection method is presented. It tracks the voltage phase angle, the system frequency, and ROCOF every power cycle. If three phase voltage vectors shift in the same direction and the rotated angle values are balanced, the calculation of the accumulated phase angle drift (PAD) will be initiated. This calculation continues until the ROCOF measurement is below the ROCOF setting threshold. If the accumulated phase angle drift reaches the set angle threshold, the condition for islanding is claimed. The performance of this composite method is verified under different scenarios based on Matlab Simscape multidomain physical systems and practical waveforms recorded from sites. Although there are still non-detection zones, this composite PAD solution has better sensitivity than existing VVS and ROCOF methods and is stable under external system faults.

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“…In recent years, the rapid advances in the communication and measurement technologies such as PMU have made possible the wide area measurement system (WAMS) [4,19,20]. Methods to locate the fault based on sparsely located wide area synchronized measurements are presented in [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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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Developments of Power System Protection and Control

Cited by 69 publications

References 11 publications

LS-Solar-PV System Impact on Line Protection

LS-Solar-PV System Impact on Line Protection

A New Passive Islanding Detection Solution Based on Accumulated Phase Angle Drift

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

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