Power Curtailment Analysis of DC Series–Parallel Offshore Wind Farms

Lakshmanan, Padmavathi

doi:10.3390/wind2030025

Cited by 2 publications

(2 citation statements)

References 28 publications

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“…Fluctuations in power output or shutdown of a single wind turbine unit can cause voltage fluctuations at the ports of all wind turbine units in the system [13]. To prevent excessively high voltages in individual wind turbine units due to significant power differences among them, voltage clamping is necessary, resulting in wind power losses [14]. Furthermore, direct connection of wind turbine units to high-voltage transmission lines, considering a voltage level of 320 kV, for instance, requires the first wind turbine unit in the series array to withstand a DC bias voltage of 320 kV, posing insulation challenges to the units and restricting the increase in transmission voltage levels [15].…”

Section: Introductionmentioning

confidence: 99%

Design of Series-Connected Novel Large-Scale Offshore Wind Power All-DC System with Fault Blocking Capability

Ru,

Wang,

2024

Electronics

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The utilization of wind power all-DC systems with DC collection and transmission is an effective solution for the extensive development of wind power in deep-sea areas. However, in the event of faults occurring in wind power all-DC systems, the fault propagation speed is extremely rapid, with a wide-ranging impact, and to date, there are no complete DC engineering references available. It is crucial to research the topology and fault isolation methods applicable to large-scale offshore wind power all-DC systems in deep-sea areas. This paper proposes a novel series-connected all-DC system topology and presents corresponding fault isolation methods for internal faults in wind turbine units and faults in high-voltage DC transmission lines. The system simulation model was constructed using PSCAD/EMTDC (v4.6.3), and simulations were conducted for internal faults in the wind turbine units and DC transmission line short-circuit faults. The simulation results demonstrate that the proposed system can isolate various DC faults while maintaining stable operation, thereby validating the effectiveness of the control strategies and fault isolation methods proposed in this paper.

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Section: Introductionmentioning

confidence: 99%

Design of Series-Connected Novel Large-Scale Offshore Wind Power All-DC System with Fault Blocking Capability

Ru,

Wang,

2024

Electronics

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“…For that, scientific researchers have performed extensive research on the parallel powertrains by splitting each single device in the powertrain system, such as the gearbox, alternator, and power converter, into several parallel devices [23][24][25][26][27]. On the one hand, the parallel generators can increase power generation, optimize efficiency of generators by running in the optimal 70-75% of rated power and ensure the continuity of power conversion during faults in generators or maintenance [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optimal control with effective wind speed estimation for maximum power extraction based on adaptive fuzzy logic controller and extended Kalman Filter

Benmahdjoub

Mezouar

Ibrahim

et al. 2023

Int. J. Dynam. Control

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The present paper aims to improve the effectiveness of an isolated water pumping system based on parallel wind turbine powertrains by using a nonlinear Integral Backstepping Controller (IBSC). In fact, the powertrain system with parallel Permanent Magnet Synchronous Generators (PMSG) is used to ensure the continuity of the power conversion system and to optimize the efficiency of generators. A three-phase PWM rectifier is implemented in the power system to convert the AC voltage obtained from parallel PMSG generators to a DC voltage. In fact, the regulated DC voltage will be supplied to a DC motor-driven water pump to control the tank level in the wind turbine pumping system. In this paper, the effective wind speed of a wind turbine is estimated by using an Extended Kalman Filter (EKF) instead of using anemometers. In addition, the Tip Tip Speed Ratio (TSR) method based on an Adaptive Fuzzy Logic Controller (AFLC) is performed to apply the Maximum Power Point Tracking (MPPT) algorithm for maximum power extraction from the available energy in the wind. Moreover, the Voltage Oriented Control (VOC) strategy is handled to control the currents of the three-phase rectifier. To evaluate the efficiency of the EKF estimator, the covariance and correlation coefficient between the estimated and measured wind speed are computed for each s 1 , while the AFLC and nonlinear IBSC controllers are evaluated by comparing their results with those obtained by the PI controller. For the wind speed estimation, the covariance and correlation coefficient results demonstrate that the EKF estimator has high accuracy with a 98% similarity between the estimated and measured wind speed. For the power extraction, the TSR based on adaptive FLC controller can extract slightly more wind energy than the PI controller. For tank level control, the nonlinear IBSC controller improves the efficiency of the wind turbine water pumping system by reducing the DC voltage surge and the overshoot of water level obtained by PI controller.

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Power Curtailment Analysis of DC Series–Parallel Offshore Wind Farms

Cited by 2 publications

References 28 publications

Design of Series-Connected Novel Large-Scale Offshore Wind Power All-DC System with Fault Blocking Capability

Design of Series-Connected Novel Large-Scale Offshore Wind Power All-DC System with Fault Blocking Capability

Nonlinear optimal control with effective wind speed estimation for maximum power extraction based on adaptive fuzzy logic controller and extended Kalman Filter

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