Abstract
Due to global warming problems and increasing environmental pollution, there is a strong tendency to install and apply renewable energy power plants (REPPs) around the world. On the other hand, with the increasing development of information and communication technology (ICT) infrastructures, power systems are using these infrastructures to act as smart grids. In fact, future modern power systems should be considered as smart grids with many small and large scale REPPs. One of the main problems and challenges of the REPPs is uncertainty and fluctuation of electrical power generation. Accordingly, a suitable solution can be combination of different types of REPPs. So, the penetration rate of large-scale wind-PV farms (LWPF) is expected to increase sharply in the coming years. Given that the LWPFs are added to the grid or will replace fossil fuel power plants, they should be able to play the important roles of synchronous generators such as power low-frequency oscillation (LFO) damping. In this paper, an LFO damping system is suggested for a LWPF, based on a phasor measurement unit (PMU)-based fractional-order proportional–integral–derivative (FOPID) controller with wide range of stability area and proper robustness to many power system uncertainties. Finally, the performance of the proposed method is evaluated under different operating conditions in a benchmark smart system.
Highlights
Global warming, environmental pollutions and other destructive effects of fossil fuels-based power generation have led to a growing focus on the use of renewable energies around the world [1]
Smart grids are based on wide-area measurement systems (WAMSs) that receive most of their desired data through the phasor measurement units (PMUs) [6]
In smart grids, there is a great demand for electrical power generation by renewable energy power plants (REPPs)
Summary
Environmental pollutions and other destructive effects of fossil fuels-based power generation have led to a growing focus on the use of renewable energies around the world [1]. One of the types of modern controllers that have been studied recently is the fractional-order proportional-integralderivative (FOPID) controller, which is the general structure of proportional-integral-derivative (PID) controllers [22]. The implementation of the PMU-based FOPID controller in the control loop of the LWPF for LFOs damping is proposed. Implementation of PMU-based FOPID-PODC In this paper, a FOPID controller is suggested to damp LFOs by the LWPF. Two various points are proposed for the FOPID-PODC in the central controller model called REPC_B model Each of these points is considered based on the LWPF control mode for reactive power/voltage control.
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