Distributed MPC of wide-area electromechanical oscillations of large-scale power systems

Abstract

Abstract-We investigate distributed Model Predictive Control (MPC) to damp wide-area electromechanical oscillations. Our distributed MPC schemes are derived from and compared with a fully centralized MPC scheme proposed in a previous publication. Based on simulations carried out using a 16-generator, 70-bus, two-area test power system, we show that simple coordination schemes based on additional local measurements' feedback yield already a significant improvement with respect to a scheme with only implicit coordination, improve significantly with respect to purely local controls, and in this respect reach about 75% of the improvements obtained by an ideal centralized MPC scheme.

Trajectory-Based Supplementary Damping Control for Power System Electromechanical Oscillations

“…The efforts applying MPC to damp electromechanical oscillations have been reported in [6], [23], [24]. However, in the present work, we focus on the RL approach to damp electromechanical oscillations.…”

“…The use of MPC to damp electromechanical oscillations has been investigated in our previous works [23], [24]. In this section, a possibility to combine control between MPC and the tree-based batch mode RL is further investigated.…”

“…It updates every 0.1 seconds supplementary damping inputs for PSSs on generator 4-6. We refer the reader to [23], [24] for further details about the MPC scheme we use. Figure 8 shows control response in terms of line 1-2 active power flow of the MPC controller alone, the RL controller alone, and when the two schemes are used in combination (while the RL-controllers have been trained with taking into account the effect of the MPC controllers on generators 4-6).…”

Decentralized Supplementary Control of Multiple LCC-HVDC Links

“…References [17]- [20] propose model predictive control (MPC) for decentralized control of large-scale systems. The controllers proposed in [19] and [20]use distributed MPC method for damping inter-area oscillations and improving long-term voltage stability, respectively. Reference [19] indicates the need for the analysis of the stability guarantees of the proposed distributed MPC schemes.…”

“…The controllers proposed in [19] and [20]use distributed MPC method for damping inter-area oscillations and improving long-term voltage stability, respectively. Reference [19] indicates the need for the analysis of the stability guarantees of the proposed distributed MPC schemes. It should be also noted that although the conventional optimal controllers, e.g., linear quadratic regulator (LQR), have static gains, the online optimization of the MPC permits the gain to vary with time and require further computation time.…”