MPPT with Current Control for a PMSG Small Wind Turbine in a Grid-Connected DC Microgrid

Abstract

This paper presents a Maximum Power Point Tracking (MPPT) system for a small wind turbine (SWT) connected to a DC Microgrid under grid-connection conditions. The system consists of a Permanent Magnet Synchronous Generator (PMSG) driven by a SWT which is interfaced to the DC microgrid through a rectification stage and boost converter. The proposed MPPT system is based on the relationship between the DC link power and voltage, which are used to obtain the required inductor current in the Boost converter to provide maximum power output at all wind speeds. The MPPT system, the Boost converter and current control are explained in detail. Simulation of the system operating under varying wind conditions is presented, showing the performance of the developed MPPT algorithm.

A Comparative Analysis of Some Methods for Wind Turbine Maximum Power Point Tracking

“…Analyzing the above characteristics, some observations can be made. The parameter λ varies with speed, according to relation (3). It also varies with the load torque.…”

“…It can be seen that the above relationships are nonlinear. The simulation parameters of the system are rated power P n = 5.5 kW; rotation speed ω r = 12.4 rad/s; the moment of inertia of the wind turbine J t = 140 kg•m 2 ; the moment of inertia of the electric generator J g = 1.05 kg•m 2 ; blade swept area A = 19.6 m 2 ; turbine blade radius R = 2.5 m; turbine constants: λ 0 = 3, a = 0.0986, b = 0.0113, C m0 = 0.0222; specific air density ρ = 1.225 kg/m 3 . These values are used in the current research performed in the university on an emulator installation of the wind power plant in Seusa, Romania [17,18].…”

“…Many works that present the method of maximum power point tracking have been published in the literature [1][2][3][4][5][6]12,13]. The maximum power P max is obtained for different wind speeds v at certain rotational speeds ω, as is presented in Figure 6.…”

“…The effectiveness of the proposed algorithm is verified by simulation of a 3 kW wind turbine system. The paper [3] presents a maximum power point tracking system for a small wind turbine connected to a DC micro-grid. The system has a permanent magnet synchronous generator interfaced to the DC micro-grid through a rectifier and a boost converter.…”

Proposed energy management for a decentralized DC-microgrid based PV-WT-HESS for an isolated community

“…The proposed control method requires only power output measurement of the conversion chain of WT. This can be achieved from the DC link's current and voltage without requiring any speed or wind 2077 measurements or another mechanic factor [24,25]. Maximum power operation for a WT realized when the ratio of the power variation on the speed variation equal to zero.…”