Frequency Sensitivity and Electromechanical Propagation Simulation Study in Large Power Systems

Electromechanical Wave Green's Function Estimation from Ambient Electrical Grid Frequency Noise

“…Also, detailed timeharmonic transient models of an interconnection can capture the details of EM waves, i.e. a frequency disturbance propagating outward from the initiating event [6] even including the reflections of the waves off the grid boundaries. We note that the accuracy of both types of off-line studies is dependent on the time-consuming task of creating models with accurate parameters for many tens of thousands pieces of grid equipment, however, the uncertainty in model parameters due to continually changing grid operating conditions and equipment availability calls into question the viability of realtime assessment of interconnection stability using these model-based techniques.…”

“…We note that the frequency disturbance used to define G ∆ f (x 1 , x 2 ,t) also corresponds to a step change in phase at x 2 , i.e. ∆Φ(x,t) = ∆Φ 0 δ(x − x 2 )Θ(t), which corresponds to an abrupt change in the local generationload balance as described above and investigated in [9,10,7,6].…”

The Tool for the In-Depth Understanding of Electromechanical Wave’s Propagation and Inter-Generator Oscillations

“…Namely, authors usually provide merely mathematically correct derivations of eigenvalues/eigenvectors together with derived indices ( [1]- [3]), which are rather difficult to follow and draw a connection between power-system related physics and mathematical derivations. Some attempts were made in the past to graphically represent electromechanical wave propagation ([4]- [6]), that inspired the authors of this work.…”

Simulation Study on Electromechanical Disturbance Propagation in Large Power System

“…In Sichuan power grid, with the help of three sets of FNTE installed in Chengdu Panzhihua and Chongqing people found that frequencies in Chengdu Panzhihua and Chongqing are temporally and spatially distributed during the 5.12 earthquake [3]. In References [4] [5], the author studied the frequency sensitivity and electromechanical disturbance propagation velocity in Eastern United States power grid and the United States power grid. Similarly in this paper we study the frequency sensitivity and electromechanical disturbance propagation of an actual power system in China basing on simulations.…”