Common Questions on Partial Discharge Testing: A Review of Recent Developments in IEEE and IEC Standards for Offline and Online Testing of Motor and Generator Stator Windings

Stone, G.C.; Stranges, M.K.W.; Dunn, Donald

doi:10.1109/mias.2015.2458337

Cited by 34 publications

(11 citation statements)

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“…However, to achieve the LVRT requirements, once the sag happened, the reactive current is injected based on the sag depth. In this context, the amount of maximum active current (I d ) injected to the grid is estimated according to Equation (7) in which the amount of active and reactive current not exceeding 110% of the inverter rated current (I n ) following to Equation (8).…”

Section: Lvrt Capability Control For Voltage Sag Mitigationmentioning

confidence: 99%

“…Figure 1 illustrates the amount of PV system capacity and annual addition in the recent ten years [1]. PVPPs have various characteristics that differ from the traditional power plants, which in turn lead to new For power quality, grid codes from countries such as Germany [3], Italy [4], USA [5], Australia [6], and many international standards like IEC standards [7] and IEEE standards [8] have enforced strict power quality rules for PV and other renewable energy sources (RESs) integration. For instance, during voltage sag, which is normally caused by the grid faults, the new requirements necessitate injecting reactive current into the PV system to overcome the sag event and to support the grid stability [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Power Quality Assessment of Grid-Connected PV System in Compliance with the Recent Integration Requirements

et al. 2020

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The generation and integration of photovoltaic power plants (PVPPs) into the utility grid have increased dramatically over the past two decades. In this sense, and to ensure a high quality of the PVPPs generated power as well as a contribution on the power system security and stability, some of the new power quality requirements imposed by different grid codes and standards in order to regulate the installation of PVPPs and ensure the grid stability. This study aims to investigate the recent integration requirements including voltage sag, voltage flicker, harmonics, voltage unbalance, and frequency variation. Additionally, compliance controls and methods to fulfill these requirements are developed. In line with this, a large-scale three-phase grid-connected PVPP is designed. A modified inverter controller without the use of any extra device is designed to mitigate the sage incidence and achieve the low-voltage ride-through requirement. It can efficiently operate at normal conditions and once sag or faults are detected, it can change the mode of operation and inject a reactive current based on the sag depth. A dynamic voltage regulator and its controller are also designed to control the voltage flicker, fluctuation, and unbalance at the point of common coupling between the PVPP and the grid. The voltage and current harmonics are reduced below the specified limits using proper design and a RLC filter. The obtained results show that the proposed controller fulfilled the recent standard requirements in mitigating power quality (PQ) events. Thus, this study can increase the effort towards the development of smooth PVPP integration by optimizing the design, operation and control strategies towards high PQ and green electricity.

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Section: Lvrt Capability Control For Voltage Sag Mitigationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Power Quality Assessment of Grid-Connected PV System in Compliance with the Recent Integration Requirements

et al. 2020

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“…Relevant PD tests for stator are briefly described and discussed by Stone et al [8] in a format of a simple FAQ for a broad audience. Standardized test methods can be found in IEEE std 1434-2014 [4] and IEC 60034-18-34 [9].…”

Section: Diagnostic Techniques Used Todaymentioning

confidence: 99%

Review of Partial Discharge and Dielectric Loss Tests for Hydropower Generator Bars

Aakre¹,

Ildstad²,

Hvidsten³

et al. 2017

NORD-IS

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Condition assessment of hydropower generators is important to ensure high serviceability of power stations. Many of the in-service generators are old and current load operation schemes demands more than the design load, which makes the remaining lifetime of the generators uncertain. The reviewed literature shows many works regarding identifying signature PRPDA patterns for different relevant defects in the generator. Calibration is however impossible, due to variable signal propagation in the generator from the partial discharge source. The results regarding complex permittivity as function of frequency as a measure on water ingress are promising. However, the field grading paint at the ends of the bars are affected by the low frequency and gives a variable capacitance. The literature is still focused on qualitative measurements without giving quantitative answers.

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“…It often occurs with secondary physical phenomena such as light and sound generation, temperature fluctuation, electromagnetic wave emission, and chemical reactions. (6)(7)(8)(9)(10) By measuring these relative performance characteristics of PD, potential internal threats can be detected so that GIS faults can be recognized and eliminated in advance.…”

Section: Introductionmentioning

confidence: 99%

A Fiber Optic Ultrasonic Sensor Using Polarization-maintaining Fiber for Partial Discharge Monitoring

Li¹,

Cao²,

Chang³

et al. 2019

Sensors and Materials

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Common Questions on Partial Discharge Testing: A Review of Recent Developments in IEEE and IEC Standards for Offline and Online Testing of Motor and Generator Stator Windings

Cited by 34 publications

References 1 publication

Power Quality Assessment of Grid-Connected PV System in Compliance with the Recent Integration Requirements

Power Quality Assessment of Grid-Connected PV System in Compliance with the Recent Integration Requirements

Review of Partial Discharge and Dielectric Loss Tests for Hydropower Generator Bars

A Fiber Optic Ultrasonic Sensor Using Polarization-maintaining Fiber for Partial Discharge Monitoring

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