A coordinated control and management strategy of a wind energy conversion system for a universal low‐voltage ride‐through capability

Abstract

Summary The increased penetration level of wind power plants has brought new issues and challenges. One of them is the low‐voltage ride‐through (LVRT). This paper proposes a coordinated control and management strategy to improve the capability of a wind‐energy conversion system (WECS) to fulfill the universal LVRT requirements. Moreover, it aims to exploit the system maximum capability in regard to its protection and to ensure an optimized power management. In fact, under grid fault, the machine‐side converter (MSC) contributes to the DC‐link voltage regulation by storing a percentage of the surplus power in the drive shaft inertia of the WECS. Meanwhile, the grid‐side converter (GSC) injects a portion of active power and reactive power required to support the grid voltage recovery. In this condition, the DC‐link voltage is controlled through batteries by a DC‐DC converter and a braking chopper circuit. Whereas, in normal grid conditions, the DC‐link is regulated via the GSC. The proposal supports the WECS to ride through severe low voltages and protects the WECS from excessive current, overvoltage, the PMSG from overspeed, and extends the batteries' lifespan. Simulation results show the effectiveness and the validity of the proposed coordinated control and management strategy.

Consolidation of LVFRT capabilities of microgrids using energy storage devices

“…The high efficiency of a battery can be kept by controlling its state of charge (SoC). Various types of rechargeable batteries are used, but lithium-ion is chosen based on decision matrix (DM) criteria in [54], [55]. Its size can be calculated by following ( 24)-( 26), which describes the discharge and charge statutes of batteries.…”

Realization of fault ride through for doubly fed induction generator system with cascade converter

“…The hardware‐based solutions 10‐30 and software‐based solutions 31‐39 have been proposed to DFIG system LVRT requirements in the literature. The most popular LVRT technique is called crowbar 10‐15 .…”

“…An alternative to the hardware‐based LVRT techniques, literature 31,32 modified the vector control of the rotor side converter (RSC) and/or grid side converter (GSC), respectively. Moreover, literature 33 proposed a coordinated control and management strategy for LVRT of the wind energy conversion system. Likewise, the authors in References 34,35 proposed the nonlinear LVRT techniques.…”

Discrete-Time DC-Link Voltage and Current Control of a Grid-Connected Inverter with LCL-Filter and Very Small DC-Link Capacitance

“…As an additional resistor increases losses and costs, in this paper, an active damping method is used and incorporated in controller design. [3] 80 µF 750 V 5 kHz 15 kV A L [8] 470 µF ≥565 V 5 kHz 5.5 kV A L [9] 470 µF 400-450 V 20 kHz 1.8 kW LCL [10] 800 µF 235-450 V 20 kHz 1 kW LCL [11] 2 • 500 µF 600 V 10 kHz 2.4 kW LCL [12] 1 000 µF 600 V -2 kW (jumps) LCL [13] 1 500 µF 700 V -12 kW L [14] 1 500 µF 680 V 10 kHz 15 kV A LCL [15] 1 500 µF 800 V -6 kW LCL [16] 2 800 µF 400 V 20 kHz 5 kV A L [17] 6 000 µF 700 V -25 kW LCL [18] 23,000 µF 1 200 V 20 kHz 1.5 MW L [19] 25,000 µF 1 750 V 4 kHz 2.5 MW LCL [20] 25,000 µF 500 V 15 kHz 7.5 kW LCL [21] 300,000 µF 700 V -1.5 MW L [22] 1 100 µF 150 V 20 kHz ≤1 kW L [23] 1 100 µF 800 V 10 kHz 20 kV A L [24] 2 000 µF 680 V 10 kHz 15 kV A LCL [25] 3 300 µF 750 V 5 kHz 17. 5…”