Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Power System Three-Phase Short Circuits01:21

Power System Three-Phase Short Circuits

114
Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...
114
Fault Types01:18

Fault Types

108
When analyzing a single line-to-ground fault from phase A to ground at a three-phase bus, it is important to consider the fault impedance. This impedance is zero for a bolted fault, equal to the arc impedance for an arcing fault, and represents the total fault impedance for a transmission-line insulator flashover. To derive sequence and phase currents, fault conditions are translated from the phase domain to the sequence domain.
For line-to-line faults occurring between phases B and C, the...
108
Bus Impedance Matrix01:24

Bus Impedance Matrix

149
Calculating subtransient fault currents for three-phase faults in an N-bus power system involves using the positive-sequence network. When a three-phase short circuit occurs at a specific bus, the analysis uses the superposition method to evaluate two separate circuits.
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
149
Three-Phase Short Circuit—Unloaded Synchronous Machine01:21

Three-Phase Short Circuit—Unloaded Synchronous Machine

169
Conducting a three-phase short circuit test on an unloaded synchronous machine helps understand its impact on the system. The AC fault current's oscillogram, with the DC offset removed, reveals that the waveform amplitude decreases from an initially high value to a steady-state level for one phase of the machine.
This behavior occurs due to the magnetic flux produced by the short-circuit armature currents. Initially, these currents follow high-reluctance paths but eventually shift to...
169
Directional Relays01:25

Directional Relays

149
Directional relays, essential for managing unidirectional fault currents, enhance the safety and efficiency of power systems. On power lines equipped with directional relays, faults downstream (to the right) of the current transformer typically cause the fault current to lag the bus voltage by approximately 90 degrees, known as the forward direction. In contrast, upstream (left-side) faults may result in the fault current leading the bus voltage by nearly 90 degrees, termed the reverse...
149
Fast Decoupled and DC Powerflow01:24

Fast Decoupled and DC Powerflow

241
The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
241

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Selective Reduction of Bimetallic Metal-Organic Frameworks to Construct Bifunctional Photothermal Catalysts.

Inorganic chemistry·2026
Same author

Atomically Engineered RuO<sub>x</sub>-Cu Interfaces Enabling Tandem Catalysis for Ampere-Level Nitrite-Ethanol Co-Electrolysis.

Angewandte Chemie (International ed. in English)·2026
Same author

Development of risk prediction model for new-onset atrial fibrillation in elderly patients undergoing video-assisted thoracoscopic surgery: a retrospective cohort study.

Journal of thoracic disease·2026
Same author

Network Pharmacology and Experimental Validation to Investigate the Effects of Huatan Huoluo Decoction on Enhancing Lipid Metabolism Mechanism.

Combinatorial chemistry & high throughput screening·2026
Same author

A review of machine learning in toxicology: current practices and reporting gaps.

Archives of toxicology·2026
Same author

Optimized TadA-derived base editors efficiently manipulate mRNA splicing by A-to-G and C-to-K editing in potato.

Journal of integrative plant biology·2026

Related Experiment Video

Updated: Jul 24, 2025

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

1.7K

Coordinate Fault Ride-Through Strategy for Connection of Offshore Wind Farms Using Voltage Source-Converter-Based

Huiying Zhou1, Siyang Ge1, Liang Qin1

  • 1School of Electricity and Automation, Wuhan University, No. 299, Bayi Road, Luojiashan Street, Wuchang District, Wuhan 430072, China.

Sensors (Basel, Switzerland)
|July 8, 2023
PubMed
Summary

A new strategy helps wind farms stay connected during grid faults. This coordinated fault ride-through method for flexible DC transmission prevents wind turbines from disconnecting due to overcurrent, ensuring grid stability.

Keywords:
DC overcurrentDFIGVSC-HVDCcoordinated FRT strategycrowbar

More Related Videos

Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator
06:04

Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator

Published on: February 14, 2025

515
Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
04:35

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment

Published on: July 5, 2024

1.9K

Related Experiment Videos

Last Updated: Jul 24, 2025

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

1.7K
Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator
06:04

Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator

Published on: February 14, 2025

515
Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
04:35

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment

Published on: July 5, 2024

1.9K

Area of Science:

  • Electrical Engineering
  • Power Systems Engineering
  • Renewable Energy Integration

Background:

  • Flexible DC transmission systems are crucial for integrating wind farms.
  • Short-time faults in one pole of bipolar DC transmission can cause overcurrent and turbine disconnection.
  • Existing solutions may require additional communication equipment.

Purpose of the Study:

  • To propose a novel coordinated fault ride-through strategy for flexible DC transmission systems and wind farms.
  • To eliminate the need for extra communication equipment in fault management.
  • To ensure the continuous operation of wind turbines during grid faults.

Main Methods:

  • Leveraging the power characteristics of doubly fed induction generators (DFIGs) under varying terminal voltages.
  • Implementing a coordinated control strategy considering safety constraints of turbines and DC systems.
  • Utilizing the DFIG rotor-side crowbar circuit for power regulation during faults.

Main Results:

  • The proposed strategy effectively mitigates overcurrent in the non-faulty pole during single-pole short-time faults.
  • Wind turbines can successfully ride through DC system faults without disconnecting.
  • Guidelines for wind farm bus voltage and crowbar switch signals are established.

Conclusions:

  • The novel coordinated fault ride-through strategy enhances the reliability of wind farm integration with flexible DC transmission.
  • The method ensures grid stability and operational continuity of wind turbines during fault events.
  • This approach offers a communication-free solution for fault management in such systems.