Factory Overvoltage Protection of Series-Connected 10kV SiC MOSFETs
This paper presents a design methodology for overvoltage protection across 10kV SiC MOSFETs during turn-off after switch failure in a MV SST Power Conditioning
Factory Analysis and mitigation of low-frequency resonance in a long-distance
Two methods of mitigating low-frequency resonance were proposed and the effects simulated. Installation of the blocking filter in the neutral bus of the converter station can reduce the
Factory (PDF) Investigation of Harmonics and Transient
It also illustrates how the transient overvoltage propagates and duration of the transient is at the results. The experimental results provide
Factory Study of Transformer Resonant Overvoltages Caused by Cable
It is also useful to assess the external overvoltages on trans-formers. The transfer of lightning overvoltages between wind-ings has been studied in – and shows, by principle, that energizing
Factory Analysis of 10kV Voltage Transformer Burning Accident
It is proved by examples that the burning accident of Taidong 10kV voltage transformer is caused by frequency division resonance. The most direct and effective measure to avoid the burning accident of
Factory Study of Transformer Resonant Overvoltages Caused by
Request PDF | Study of Transformer Resonant Overvoltages Caused by Cable-Transformer High-Frequency Interaction | Power transformers can fail from dielectric stresses caused
Factory Simulation and Analysis of Operating Overvoltage of AC
After the end of the transient process, the continuous overvoltage with duration of more than 0.1 s to seconds or even hours is called transient overvoltage, which includes power frequency overvoltage
Factory Ferroresonance Causing Sustained High Voltage at A De-energized
Ferroresonance causes overvoltage and excessive current flow on potential transformers (PT), which can cause substantial damage to PTs and interrupt power system normal operation. In this paper, a
Factory Simulation and Experiment Analysis of 10 kV Flexible
The authors of used a shunt circuit breaker (SCB) to earth the faulty phase temporarily at the feeding. The major limitation was the occurrence
Factory Mitigating The Ferroresonance Resulting from HILGF Clearing in a
On another hand, the system should be capable of blocking the resulting overvoltage and overcurrent. The mitigation models for ferroresonance transients are as varied as their specificities. In , a
Factory Switching Overvoltage Characteristics of -1100-kV UHVDC Converter
The present study analyzed the characteristics of switching overvoltage, and discussed in detail the main influencing factors and worst-case conditions of switching overvoltage in the ±1100
Factory Managing VFD Overvoltage Faults During Deceleration (Regenerative
The drive''s DC bus voltage then rises above safe limits, triggering an overvoltage trip. Overvoltage faults during deceleration are especially common in applications like large fans, pumps, and conveyors
Factory Overvoltages and insulation coordination in MV and HV
Overvoltage by ferromagnetic resonance In this case the overvoltage is the result of a special resonance which occurs when a circuit contains both a capacitor (voluntary or stray) and an inductance with
Factory How to Easily Neutralize Overvoltages with a Protective Circuit
In many applications, it is crucial to safeguard against overvoltages. This article explains how overvoltages can be neutralized with a protective circuit. Overvoltages can be caused, for
Factory Analysis and Measures of 10kV Bus PT Breakdown Accident
A 10kV bus PT breakdown accident caused by two-phase grounded is mainly introduced in this paper. Firstly, the bus voltage variation is analyzed when two-phase grounded occurs. Then, the
Factory Impact of Uncertainties on Resonant Overvoltages
In this paper the impact of uncertainties on resonant overvoltages is investigated. In Section II, different uncertainties and their impact on resonances and resonant overvoltages are described. Section III
Factory Temporary Overvoltages in Power Systems
[This paper describes the resonance overvoltages encountered during the energization of transformers in transmission systems, proposes the use of electromagnetic transient computer programs for
Factory Study of Transformer Resonant Overvoltages Caused by Cable
In this paper, we focus on a special phenomenon where excessive overvoltages arise due to res-onance. This situation can take place when a transformer on the high-voltage side is connected to a
Factory Study of Transformer Resonant Overvoltages Caused by
3) Using a black-box model of the transformer, a measurement of a cable-transformer resonant overvoltage is reproduced with a high degree of accuracy.
Factory Ferroresonance Causing Sustained High Voltage at A De
In this paper, a sustained overvoltage event on a de-energized 138 kV bus after circuit breakers were opened to clear a phase to ground fault at a Canadian transmission utility power grid
Factory Impact of Uncertainties on Resonant Overvoltages
In order to ensure required redundancy, parallel cables may be installed even if a single cable is sufficient to handle the transferred power. This will lead to an effective increase of the capacitance of
Factory Calculation of Power System Overvoltages | part of Transient Analysis
This chapter presents a short description of the main causes of overvoltages and a summary of the modelling guidelines to be used when calculating overvoltages with a transients tool like ATP. For
Factory Mitigating the ferroresonance resulting from HILGF clearing in a
A mitigation system was proposed and subsequently tested, with simulation results showing that the ferroresonance-induced overvoltage and overcurrent levels were restored to normal
Factory Ferromagnetic Resonance Overvoltage Study and Suppression
The characteristics of ferromagnetic resonant overvoltage caused by ground fault are analyzed, and different elimination strategies are simulated to achieve optimal suppression of
Factory Overvoltage Protection of Series-Connected 10kV SiC
The methodology uses an active voltage clamp at the gate terminal and desat detection technique to identify abrupt open and turn-on switch failures across series-connected 10kV SiC
Factory Resonant Overvoltages during Transformer-Cable
This paper presents a practical case study where a transformer-feeder circuit consisting of 400/132 kV autotransformer and 132 kV cable was