A New Method of Voltage Sag and Swell Detection

Naidoo, Vinogran; Pillay, Pragasen

doi:10.1109/tpwrd.2007.893185

Cited by 156 publications

(61 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Further contribution for quick detection of voltage sags and swells is based on extracting a single non-stationary sinusoidal signal out of a given multi-components input signal [7], [8] Radial basis function (RBF) neural network [11] and improved S-transform [12] have proposed for characterizing and identifying different sag types.…”

Section: Typical Values Of the Voltage Sags Are Between 10%mentioning

confidence: 99%

New Adaptive Method for Voltage Sag and Swell Detection

Mohamed¹

2013

Journal of the Korea Convergence Society

View full text Add to dashboard Cite

This paper presents an adaptive recursive least squares algorithm (ARLS) for detecting voltage sag and voltage swell events in power systems. Different methods have been developed to detect voltage sag and voltage swell. Some of them use window techniques, which are too slow when voltage sag or swell mitigation is required. Others depend on the extraction of a single non-stationary sinusoidal signal out of a given multi-components input signal, and therefore they don't consider the harmonic components in calculating the voltage root mean square value (rms). The method, proposed in this paper, is capable of estimating the voltage rms taking into account all harmonic components. The method is tested by applying it to different, simulated signals using ATP program, and compared with voltage sag detection algorithms.•

show abstract

Section: Typical Values Of the Voltage Sags Are Between 10%mentioning

confidence: 99%

New Adaptive Method for Voltage Sag and Swell Detection

Mohamed¹

2013

Journal of the Korea Convergence Society

View full text Add to dashboard Cite

show abstract

“…In contrast, the software-based peak voltage detector has demonstrated growing hardware performance. Since the introduction of the RMS method in [12], similar peak detectors have been released for power systems [1], [2], [8], [10]. For example, the compensation devices of voltage sag requires a peak detector and must respond in less than a quarter of cycle, or as fast as possible, which is difficult to accomplish.…”

Section: Conventional Peak Detector With All-pass Filtermentioning

confidence: 99%

“…Most of conventional peak detector methods have time delays, including the RMS method (2-9 ms) [12], the hybrid KF-RMS method (0.5-4 ms) [2], and DVR (2 ms) [11]. Other methods report a delay of 1-4 ms [1], with the maximum delay being generated around 0° or 180° for all methods. The proposed fast peak detector decreases average detection delay within 0.5 ms in any phase; a three-to five-cycle sampling time is needed.…”

Section: Proposed Fast Peak Detectormentioning

confidence: 99%

“…Voltage sags are a decrease in root mean square (RMS) voltage below 0.9 pu of nominal voltage at the power frequency for durations from 0.5 cycle to 1 min, thereby causing expensive downtime [1]. The sag phenomenon is caused by atmospheric discharges, transformer energizing, short circuits, turning on of motors, and high power loads such as from soldering machines and arc furnaces.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Novel Fast Peak Detector for Single- or Three-phase Unsymmetrical Voltage Sags

Lee¹,

Cha²

2011

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

-In the present paper, a novel fast peak detector for single-or three-phase unsymmetrical voltage sags is proposed. The proposed detector is modified from a single-phase digital phase-locked loop based on a d-q transformation using an all-pass filter (APF). APF generates a virtual phase with 90° phase delay. However, this virtual phase cannot reflect a sudden change of the grid voltage in the moment of voltage sag, which causes a peak value to be significantly distorted and to settle down slowly. Specifically, the settling time of the peak value is too long when voltage sag occurs around a zero crossing, such as phase 0° and 180°. This paper describes the operating principle of the APF problem and proposes a modified all-pass filter (MAPF) to mitigate the inherent APF problem. In addition, a new fast peak detector using MAPF is proposed. The proposed detector is able to calculate a peak value within 0.5 ms, even when voltage sag occurs around zero crossing. The proposed fast peak detector is compared with the conventional detector using APF. Results show that the proposed detector has faster detection time in the whole phase range. Furthermore, the proposed fast peak detector can be effectively applied to unsymmetrical three-phase voltage sags. Simulation and experimental results verify the advantages of the proposed detector and MAPF.

show abstract

“…When a large inductive load starts, it usually consumes an inrush current that is approximately 5 to 10 times higher than its rated current and causes an instantaneous voltage sag in the power distributing board. Therefore, fast detection algorithms for voltage sags have been researched to protect power systems [1][2][3]. Moreover, this large inrush current and voltage sag may lead to a malfunction of electrical and electronic devices [4].…”

Section: Introductionmentioning

confidence: 99%

A Novel Hybrid Sequential Start Control System for Large Inductive Loads

Kim¹,

Kim²

2015

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

-The inrush current of a large inductive load can be reduced with a soft starter; however, the large inrush current caused by simultaneous bulk starts (SBSs) cannot be effectively reduced. In order to reduce the high inrush current and voltage sag owing to the SBSs of large capacity inductive loads within a power network, a novel hybrid sequential start control system is proposed, implemented on embedded systems, and evaluated with a testbed in this study. From the experimental and simulation results of the proposed control system, the inrush current could be effectively restricted below the maximum current capacity of a power distributing board. Moreover, with the proposed system, power cost typically dictated by the peak power consumption can be fairly reduced, and the quality of the power system connected to the inductive loads can be efficiently increased.

show abstract

A New Method of Voltage Sag and Swell Detection

Cited by 156 publications

References 10 publications

New Adaptive Method for Voltage Sag and Swell Detection

New Adaptive Method for Voltage Sag and Swell Detection

Novel Fast Peak Detector for Single- or Three-phase Unsymmetrical Voltage Sags

A Novel Hybrid Sequential Start Control System for Large Inductive Loads

Contact Info

Product

Resources

About