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See detailProspects of a new dynamic simulation software for real-time applications on the Hydro-Québec system
Aristidou, Petros ULg; Lebeau, Simon; Loud, Lester et al

in 2015 CIGRÉ Canada Conference proceedings (in press)

Hydro-Québec has a long interest in on-line Dynamic Security Assessment (DSA) driven by its challenging power network dynamics (angle, frequency and voltage stability, short and long-term dynamics). At ... [more ▼]

Hydro-Québec has a long interest in on-line Dynamic Security Assessment (DSA) driven by its challenging power network dynamics (angle, frequency and voltage stability, short and long-term dynamics). At the moment, off-line calculated security indicators are combined with an on-line monitoring system to ensure the security of the system. However, new developments in power system dynamic simulation algorithms facilitate real-time or near-real-time DSA calculations and enable on-line transfer limits determination. In this paper, the domain-decomposition-based algorithm implemented in the dynamic simulator RAMSES is presented, along with the techniques used to accelerate both its sequential and parallel execution. RAMSES exploits the localized response of power systems to disturbances and the timescale decomposition of dynamic phenomena to provide sequential acceleration when the simulation is performed on a single processing unit. In addition, when more computational units are available, the parallelization potential of domain-decomposition methods is exploited to provide parallel acceleration. The presented algorithm and techniques are tested on a realistic model of the Hydro-Québec system and the accuracy of dynamic response, the sequential and parallel performances are evaluated. Finally, the real-time capabilities of the simulator are assessed using a shared-memory parallel processing platform. [less ▲]

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See detailWind integration and AGC frequency dynamics simulations using Quasi Steady-State approximation
Lebeau, Simon; Qako, Niko; Van Cutsem, Thierry ULg

in Proc. of 9th international workshop on large-scale integration of wind power in powers systems (2010, October)

Frequency dynamics studies are important at Hydro-Québec (HQ). Wind integration raises questions about HQ ability to maintain frequency regulation in normal operation and during contingencies. Quasi ... [more ▼]

Frequency dynamics studies are important at Hydro-Québec (HQ). Wind integration raises questions about HQ ability to maintain frequency regulation in normal operation and during contingencies. Quasi Steady-State (QSS) approximation is the best alternative to simulate long-term voltage and frequency dynamics without compromising the exactness of simulation results. Collaboration between HQ and University of Liège allowed the development of numerous models. Frequency dynamics is represented by machines inertia, speed governors and a complete AGC controlling 13 hydro power plants including transmission delays. For voltage dynamics, static var compensators, synchronous condensers and tap changer transformers are also represented. Wind farms are modeled as generation patterns (Pwind = f(t)) including a Wind Farm Management System (WFMS). This paper addresses wind farm integration and AGC frequency regulation. Based on HQ field measurements and observations, the most pessimistic cases were simulated. Two scenarios are detailed: the 3500 MW of wind farms currently planned for 2015 and a hypothetical 10 000 MW of wind integration. The results show that actual AGC settings are accurate for the planned wind farms, but might need some changes for a 10 000 MW scenario. [less ▲]

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