A - Background and objectives
The European Transmission Network (ETN) has been evolving significantly in the ways that network operators work and cooperate with each other, in particularly by setting up common operating procedures and tools such as network simulation tools for coordinated training purposes. In the domain of power system state estimation and transmission network time simulation, very few innovations have emerged over the past decade (2000-2010) in Europe. Breakthroughs are therefore expected in power system simulation along four directions to serve the ETN: state estimation, optimization algorithms, time domain simulation and power system component modelling.
The PEGASE project aimed to remove several algorithmic barriers related to the monitoring, simulation and optimization of very large power systems, therefore paving the way for improved network operation.
B - Description of the result
A Dispatcher Training Simulator (DTS) is a key tool of the coordination of operations at the pan European Transmission Network level. Training tools for operators on multilateral cross-border operational issues are indeed crucial, in order to cope with events that might lead to large-scale blackouts if not timely tackled. This requirement is reinforced by the fact that there is an increasing number of electronic devices impacting significantly the electro-mechanical behaviors of the pan European Transmission Network.
To-day’s Dispatcher Training Simulators make use of a replica of a single control center linked to a quasi-steady state power system model. This is no longer satisfactory, since a real-time simulation tool is needed for simulating the entire pan European Transmission Network with high fidelity, whatever the electromechanical behavior of the system, up to the complete blackout and the subsequent restoration. This simulation tool should capitalize on the new knowledge gained on innovative algorithms developed during the PEGASE project.
Based on the other research results of the project, a DTS simulation engine prototype has been developed and implemented in an existing DTS framework. The DTS uses a fix step-size (typically 10 or 20 milliseconds) since it allows to be faster during transients than the variable step size, whereas the variable step size approach is faster on average. When compared to the algorithm included in the full accuracy prototype, the numerical simulation accuracy is just slightly reduced to the benefit of the robustness of the integration method, since the ultimate goals of the 2 prototypes are different. This prototype includes also:
The possibility for the user to define the controllers using block-diagram. This feature allows the integration of all the technology models developed in the frame of PEGASE into the DTS, including power electronics models. This functionality is also very important for a DTS used in production environment where the models must be easy to maintain and/or to improve in order to follow the evolution of the real system.
A modern communication protocol. The integration of the OPC/UA communication protocol allows to easily connect the DTS engine to various modern Man Machine Interface and/or Supervisory Control And Data Acquisition (SCADA).
The compatibility with the Full Accuracy prototype. All models handled by the DTS prototype can be exported to the Full Accuracy Prototype. It allows validating the DTS and providing the trainer with greater flexibility to prepare complex training scenarios.
According to the PEGASE Consortium Agreement, the Dispatcher Training Simulator (DTS) prototype is owned by TRACTEBEL, which will be responsible for the prototype commercialization.