Browse Conferences
Impact of state-space modelling fidelity on the small-signal dynamics of VSC-HVDC systems
The main purpose of the paper is to investigate the effect of state-space modelling fidelity on the small signal stability characteristics of HVDC systems based on Voltage Source Converters (VSCs). For this purpose, a small-signal state-spa...
Transient Analysis Modelling of Complex HVDC Networks using Parallel Computing
This paper presents a transient analysis modelling of a multiterminal HVDC network using PSCAD EMTDC on a parallel computing grid platform. The different dynamic cases, such as re-dispatch of power flow in DC network, DC network fault clear...
A Fast Calculation Method for the Local Commutation Failure Immunity Indices in Single- and Multi-infeed HVDC Systems
The Commutation Failure Immunity Index (CFII) is a good predictor which quantifies the susceptibility of an HVDC system to commutation failure. However, this index is based on many electromagnetic simulations and requires extensive computat...
A New Control Strategy of Decoupling the AC/DC Voltage-offset for Modular Multilevel Converter
For its notable advantages, the modular multilevel converter (MMC) has become a hot topic in high-voltage direct current (HVDC) research and construction. Based on the existing MMC configuration and double-loop control strategy, there's a c...
Real Time Simulation for HVDC grids with modular multi-level converters
This paper focuses on comparison studies of the CIGRE DC grid test systems on the real time platform RTDS and the offline simulation program PSCAD. The real time MMC valve models employ a surrogate network topology to reduce the computation...
Comparison of Different Technologies for Improving Commutation Failure Immunity Index for LCC HVDC in Weak AC Systems
Flexible AC Transmission System (FACTS) devices and Voltage Source Converter (VSC) High Voltage Direct Current (HVDC) systems have fast reactive power control capabilities which can be used to increase power system voltage stability. When l...
An active damping scheme of the voltage-source converter driving the induction machine damping unit for mitigating subsynchronous oscillation in power systems
An induction machine damping unit (IMDU), installing on the main shaft of the turbine-generator unit, is capable of damping subsynchronous oscillation (SSO) of the shaft. The electrical damping of IMDU in the subsynchronous frequency range ...
Power-System Modeling - A Transfer Matrix Approach
With increasing utilization of high power-electronic converters, power-system modeling and stability analysis become ever more challenging. This paper introduces a transfer-matrix-based modeling method for power-system stability analysis. T...
Assessment of Line Overloading Risk for Transmission Networks
Traditional approaches to transmission system security assessment use deterministic criteria e.g. the application of `N-1' or `N-2' circuit depletion under prescribed heavy system loading conditions. However, such worst-case deterministic a...
Robust coordination damping control of multi-model system with FACTS devices via sequential approach
In this paper, multiple flexible AC transmission systems (FACTS) supplementary damping controllers are designed for the enhancement of system small-signal stability under different system operating points. A static var compensator (SVC) and...