Benchmark Models for the Analysis and Control of Small-Signal Oscillatory Dynamics in Power Systems

Abstract

Abstract-This paper summarizes a set of six benchmark systems for the analysis and control of electromechanical oscillations in power systems recommended by the IEEE Task Force on Benchmark Systems for Stability Controls of the Power System Dynamic Performance Committee. The benchmark systems were chosen for their tutorial value and particular characteristics leading to control system design problems relevant to the research community. For each benchmark, the modelling guidelines are provided, along with eigenvalues and time-domain results produced with at least two simulation software, and one possible control approach is provided for each system as well. Researchers and practicing engineers are encouraged to use these benchmark systems when assessing new oscillation damping control strategies.Index terms-benchmark system, small-signal stability, electromechanical oscillations, damping controller, power system stabilizer.

Avoiding AC/DC grid interaction in MMC based MTDC systems

“…All three ac grids contain multiple generators, and represent large power systems. System topology and data for Grid#1, Grid#2, and Grid#3 are taken from benchmark systems given in [13], [14], and [15], respectively. The dc grid is a symmetrical monopolar system with ±200 kV voltage rating.…”

Towards maximising the integration of renewable energy hybrid distributed generations for small signal stability enhancement: A review

“…However, the output power of renewable energy hybrid distributed generations (REHDGs) such as wind and solar photovoltaic (PV) are highly variable because it depends on solar irradiation, temperature, and wind speed, which are intermittent . Hence, substantial body of research has unequivocally agreed that the variability (sudden changes) of generated power, due to these renewable resources intermittencies, relative to load or vice versa results in power system oscillations . In essence, small signal power angle instabilities occur when there is an imbalance between the total power generated from the REHDGs and other plants and the aggregate power demand at a time in the distribution network .…”

“…The small signal instability with its oscillatory behaviour can greatly threaten the power system security as it is one of the main cause of power system failures (blackout) . These have made it difficult to integrate intermittent renewable energy hybrid DG systems into power distribution systems . Meanwhile, different locations of integration and sizes of REHDG units in the DNS affect the system oscillation modes by either improving or depriving the small signal stability of the network .…”

“…3,4,14 Hence, substantial body of research has unequivocally agreed that the variability (sudden changes) of generated power, due to these renewable resources intermittencies, relative to load or vice versa results in power system oscillations. [15][16][17][18][19][20][21][22] In essence, small signal power angle instabilities occur when there is an imbalance between the total power generated from the REHDGs and other plants and the aggregate power demand at a time in the distribution network. 14,17 These issues occur more often in the power system.…”

“…18,21,22 These have made it difficult to integrate intermittent renewable energy hybrid DG systems into power distribution systems. 19,20 Meanwhile, different locations of integration and sizes of REHDG units in the DNS affect the system oscillation modes by either improving or depriving the small signal stability of the network. 4,15,[25][26][27][28][29][30][31][32] The aforementioned issues make the formulation of REHDGs' optimal allocation problems tasking to solve using simple mathematical models.…”