Towards Critical Clearing Time Sensitivity for DAE Systems with Singularity

El presente artículo propone una metodología para evaluar el impacto de la incertidumbre de la demanda eléctrica, sobre la estabilidad transitoria del sistema con base en el análisis probabilístico del tiempo crítico de despeje de falla CCT (Critical Clearing Time). El análisis probabilístico de estabilidad transitoria, permite establecer una función de densidad de probabilidad (PDF por sus siglas en inglés) del comportamiento del CCT. La PDF se calcula a partir de simulaciones de Montecarlo, donde, para cada escenario generado y contingencia, se evalúa el CCT. Para el cálculo del CCT se emplea el método de la bisección, variando el tiempo de duración de falla (

Download Full-text

Critical clearing time prediction by neural networks in power system transient stability analysis

3rd International Conference on Advances in Power System Control, Operation and Management (APSCOM 95) ◽

10.1049/cp:19951271 ◽

1995 ◽

Author(s):

Kunsong Huang

Keyword(s):

Neural Networks ◽

Stability Analysis ◽

Power System ◽

Transient Stability ◽

Time Prediction ◽

Clearing Time ◽

Transient Stability Analysis

Download Full-text

Dynamic grid fault analysis in wind power plant with DFIG by using supervisory control and data acquisition (SCADA) viewer

E3S Web of Conferences ◽

10.1051/e3sconf/202018103006 ◽

2020 ◽

Vol 181 ◽

pp. 03006

Author(s):

Nduwamungu Aphrodis ◽

Ntagwirumugara Etienne ◽

Utetiwabo Wellars ◽

Mulolani Francis

Keyword(s):

Power Systems ◽

Power Flow ◽

Control Strategies ◽

Electrical Power ◽

Fault Analysis ◽

Operational Mode ◽

Electrical Power Systems ◽

Fault Ride Through ◽

Before And After ◽

Clearing Time

Faults in electrical power systems are among the key factors and sources to network disturbances, however control strategies are among key faults clearing techniques for the sake of safe operational mode of the system.Some researchers have shown various limitations of control strategies such as slow dynamic response,inability to switch Off and On network remotely and fault clearing time. For a system with wind energy technologies, if the power flow of a wind turbine is interrupted by a fault, the intermediate-circuit voltage between the machine-side converter and line-side converter will fall in unacceptably high values.To overcome the aforementioned issues, this paper used a Matlab simulations and experiments in order to analyze and validate the results.The results showed that fault ride through (FRT) with SCADA Viewer software are more adaptable to the variations of voltage and wind speed in order to avoid loss of synchronism. Therefore at the speed of 12.5m/s a wind produced a rated power of 750W and remained in synchronization before and after a fault created and cleared but worked as generator meanwhile at speed of 3.4m/s wind disconnected from grid and started working as a motor and consumed active power (P=-25watts) and voltage dip at 100% .For the protection purpose, the DC chopper and crowbar should be integrated towards management of excess energy during faults cases.

Download Full-text