Products System and market analyses Determination of settings for voltage regulators and system stabilisers for synchronous generators
The offer of the Institute of Power Engineering, Gdańsk Division includes determination of settings for automatic voltage regulators (AVR) and power system stabilisers (PSS) for synchronous generators. For this purpose, dynamic models of the analysed synchronous generator together with excitation systems are developed, and then settings are determined and verified using specialised simulation tools. Indicators taken into account for determination of voltage regulator settings are the system response rate, the over-regulation value, the response time or the accuracy of regulation. The settings determined for system stabilisers provide an increase in the damping moment of the unit, which results in more effective damping of local electromechanical oscillation (local modes) and inter-area oscillation (inter-area modes). The developed settings ensure the stable operation of synchronous generators and the compliance with the requirements for voltage regulation systems that are specified for instance in the IEEE standard and in the Transmission Grid Code. The determined settings are ready for implementation in regulation systems of actual synchronous generators, i.e. in systems developed and constructed by the Gdańsk Division or other manufacturers.
A similar issue is the development of a mathematical model for an existing synchronous generator with a parametrised voltage regulator, a system stabiliser and limiters. The correctness of the completed model is verified by comparing the simulation results with the generator's actual responses recorded during the measurements taken at the facility. The developed model meets the requirements specified by the TSO or by foreign regulators (e.g. NERC and MOD-026 required in the USA) and enables e.g. PSS settings optimisation to increase electromechanical oscillation damping.
Mariusz Mazur
