TORSIONAL ANALYSIS (TOR) SIEMENS ADVANCED DYNAMIC AND TRANSIENTS MODULES POWERED BY PSS NETOMAC

Product Description

Requirements and Use Cases

The use of series compensation in order to increase transmission capacity and to stabilize grid operation can lead to the phenomenon of subsynchronous resonances (SSR) with drive shafts of conventional generating plants and thus can lead to damage of shafts and protection tripping. Converter-based technologies can also lead to subsynchronous interactions (SSTI) with the drive shafts. These dangers must be assessed already in the planning phase of such systems, but also when the resonances are detected during operation, and necessary countermeasures must be taken in order to avoid damages and fatigue.

Solution

Based on the transient engine PSS®NETOMAC, the expert mode in this module (TOR) allows the extension of the models of the machines by the definition of the drive shaft in order to consider the influence of turbine stages and excitation system in the mechanical part of a power plant. On the one hand, this supports the user in the assessment of mechanical stresses on the drive shafts when subsynchronous resonances (SSR) and interactions (SSTI) occur and in the development of appropriate countermeasures when dimensioning and commissioning a plant. On the other hand, it enables the user to evaluate the electromagnetic effects of the compensation processes.