Optimal PID controller of large‐scale PV farms for power systems LFO damping

Abstract

Summary The penetration of large‐scale photovoltaic farms (LPFs) is ever increasing. Given that LPFs are added to power systems or replaced by conventional power plants, they should undertake the most common tasks of synchronous generators. One of these tasks is the low‐frequency oscillation (LFO) damping using power system stabilizer. This paper proposes a general method for LFO damping using LPFs by designing an optimal proportional‐integral‐derivative (PID) controller as a power oscillation damper in the nonlinear control loop of LPF. Considering the need for a valid LPF model, therefore the second generation generic model, developed and approved by western electricity coordinating council, is used. The PID controller is optimally tuned using the particle swarm optimization algorithm in order to produce an effective LFO damping. Finally, the performance of this controller is investigated in the modified two‐area test system, showing the proper performance of the LPF for LFO damping using the proposed optimal PID controller in the various operating condition and different short circuit ratio values.

Optimal coordinated tuning of power system stabilizers and wide‐area measurement‐based fractional‐order PID controller of large‐scale PV farms for LFO damping in smart grids

“…In 2016, the new idea based on adaptive control was suggested for controller design using LPF FGGM. 10 In References 11‐14 in 2019, the lead‐lag controller was proposed as POD for LPFs based on generic dynamic model for renewable technologies (GDMRT), second generation generic model (SGGM), and FGGM for LPFs.It should be noted that Reference 14 proposed the lead‐lag controller for LPF in a smart power system considering stochastic time delay.Recently, the proportional‐integral‐derivative (PID) controller has been proposed as POD for LFO damping using LPF 15 . The results of this study showed the superiority of the PID controller compared to the lead‐lag controller in terms of LFO damping.…”

“…Recently, in some studies, the LFO damping by an auxiliary controller has been proposed as a power oscillation damper (POD) through LPFs 9‐15 . This idea was first raised in 2013 9 .…”

“…8 Recently, in some studies, the LFO damping by an auxiliary controller has been proposed as a power oscillation damper (POD) through LPFs. [9][10][11][12][13][14][15] This idea was first raised in 2013. 9 In that study, a linear-quadratic Gaussian (LQG) controller was considered as a supplementary controller for LFO damping using LPFs first generation generic model (FGGM).…”

Optimal design of power system stabilizer for multimachine power system using farmland fertility algorithm

“…1 Two design requirements that are key for large interconnected multimachine power system are transient stability and electromechanical modes (EMs) damping of sustained power system oscillation. 2 Interconnecting the large power system under steady state system condition means that each synchronous generator revolves in synchronism 3 and achieving this under any system disturbance is a requisites for the overall system stability. Power system oscillations was first revealed in October, 1964 in the interconnected power system of Northern USA during the tentative North-South power lines tie line.…”

“…To cater for the ever‐growing energy demand, interconnecting the multimachine power systems rather than its utilization in an isolation is imperative 1 . Two design requirements that are key for large interconnected multimachine power system are transient stability and electromechanical modes (EMs) damping of sustained power system oscillation 2 3 and achieving this under any system disturbance is a requisites for the overall system stability.…”