Dynamic Equivalent Model Development to Improve the Operation Efficiency of Wind Farm

Cheng, Xueyang; Lee, Wei-Jen; Sahni, M.; Cheng, Yunzhi; Lee, Lyndon K.

doi:10.1109/tia.2016.2537778

Cited by 48 publications

(16 citation statements)

References 20 publications

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“…If each wind turbine were modeled in detail, then data preparation and model calculations would involve substantial amounts of time and effort. The most efficient method for simulating a large wind farm uses an equivalent wind farm to reduce complexity and simulation time [56,57]. Equivalent methods for simulating wind farms typically involve a single-machine model or a multi-machine model; however, to reflect actual operating conditions, most equivalent methods use multi-machine models [58][59][60].…”

Section: Equivalent Model For a Wind Farmmentioning

confidence: 99%

Key Issues on the Design of an Offshore Wind Farm Layout and Its Equivalent Model

Zeng

2019

Applied Sciences

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Offshore wind farms will have larger capacities in the future than they do today. Thus, the costs that are associated with the installation of wind turbines and the connection of power grids will be much higher, thus the location of wind turbines and the design of internal cable connections will be even more important. A large wind farm comprises of hundreds of wind turbines. Modeling each using a complex model leads to long simulation times—especially in transient response analyses. Therefore, in the future, simulations of power systems with a high wind power penetration must apply the equivalent wind-farm model to reduce the burden of calculation. This investigation examines significant issues around the optimal design of a modern offshore wind farm layout and its equivalent model. According to a review of the literature, the wake effect and its modeling, layout optimization technologies, cable connection design, and wind farm reliability, are significant issues in offshore wind farm design. This investigation will summarize these important issues and present a list of factors that strongly influence the design of an offshore wind farm.

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Section: Equivalent Model For a Wind Farmmentioning

confidence: 99%

Key Issues on the Design of an Offshore Wind Farm Layout and Its Equivalent Model

Zeng

2019

Applied Sciences

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“…GA is used to estimate the parameters [16]. Xueyang Cheng et al estimate the key parameters of the equivalent model of DFIG wind farm using PSO gradient search optimization with PMU data [17]. Yinfeng Wang et al use improved GA to strengthen the capability of global optimization [18].…”

Section: Introductionmentioning

confidence: 99%

Parameters Identification of Equivalent Model of Permanent Magnet Synchronous Generator (PMSG) Wind Farm Based on Analysis of Trajectory Sensitivity

Zhang

Cui

2020

Energies

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As wind farms have great influences on power system stability, it is essential to develop an adaptive as well as robust equivalent model of it. In this paper, a detailed equivalent model of PMSG wind farm and initialization method is developed. The trajectory sensitivity of parameters is analyzed. Then, the key parameters are estimated using improved Genetic Learning Particle Swarm Optimization (GLPSO) hybrid algorithm with phasor measurement unit (PMU). The description and generalization capability, stability for parameter identification of the equivalent model under wake effects, and when some wind turbines are off-line or wind speed is unknown after an event are analyzed. The maximum differences between the values of estimated parameters and their real ones are less than 10% for the proportional magnification constant of DC voltage controller and grid side current controller . The convergence rate and global optimization performance of the improved GLPSO hybrid algorithm is 0.5 times higher than the classical particle swarm optimization algorithm (PSO) and genetic algorithm (GA).

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“…Wind energy, as one of the fastest growing renewable energy sources, is gradually becoming mainstream and competitive with conventional energy sources [1][2][3][4]. The installed capacity of wind energy has increased from 6100 MW in 1996 to 432,883 MW by 2015 [2].…”

Section: Introductionmentioning

confidence: 99%

A Steady-State Analysis Method for Modular Multilevel Converters Connected to Permanent Magnet Synchronous Generator-Based Wind Energy Conversion Systems

Liu

Sun

et al. 2018

Energies

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Modular multilevel converters (MMCs) have shown great potential in the area of multimegawatt wind energy conversion system (WECS) based on permanent magnet synchronous generators (PMSGs). However, the studies in this area are few, and most of them refer to the MMC used in high-voltage direct current (HVDC) systems, and hence the characteristics of the PMSG are not considered. This paper proposes a steady-state analysis method for MMCs connected to a PMSG-based WECS. In the proposed method, only the wind speed (operating condition) is required as input, and all the electrical quantities in the MMC, including the amplitudes, phase angles and their harmonics, can be calculated step by step. The analysis method is built on the proposed d-q frame mathematical model. Interactions of electrical quantities between the MMC and PMSG are comprehensively considered. Moreover, a new way to calculate the average switching functions are adopted in order to improve the accuracy of the analysis method. Applications of the proposed method are also presented, which includes the characteristic analysis of capacitor voltage ripples and the capacitor sizing. Finally, the accuracy of the method and the correctness of the analysis are verified by simulations and experiments.Energies 2018, 11, 461 2 of 31 require a large amount of series or parallel connected power devices in order to achieve the required power, which reduces the reliability of WECS. Moreover, the traditional converters are not suitable for medium-voltage (3-33 kV) WECS, which is becoming popular for turbine power ratings greater than 3.0 MW [6,7]. These drawbacks lead to the studies of new full-scale power converters.The modular multilevel converter (MMC), which became the most common type of voltage-source converter used in the high-voltage direct current (HVDC) applications, is also a suitable converter for PMSG-based WECS. In [8,9], MMC was used for medium-voltage motor drives, which opened up the study of MMC applied to variable-speed machines. The application of MMCs in PMSG-based WECS was first studied in [10]. That paper concluded that MMC should be considered a suitable option for transformerless 10 MW PMSG-based WECS, and performs well in the full system. In [11], the authors proposed an improved online fault identification scheme for the MMC applied to WECS, which avoided the use of extra sensors by only using the already available variables in detection, and therefore the maintenance cost of the distant offshore wind farms can be reduced. In [12], the complete control scheme of MMC applied to the PMSG-based WECS was proposed. Low voltage ride-through problems and capacitor voltage ripple problems were also studied in that paper. In addition, the increasing interest in all-dc wind farms, in recent years, will also enlarge the application of MMC in WECS [13][14][15].Steady-state analysis can be used for component sizing and assessment of the impact of different parameters on the MMC performance. However, there is no reference available for the steady-state anal...

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Dynamic Equivalent Model Development to Improve the Operation Efficiency of Wind Farm

Cited by 48 publications

References 20 publications

Key Issues on the Design of an Offshore Wind Farm Layout and Its Equivalent Model

Key Issues on the Design of an Offshore Wind Farm Layout and Its Equivalent Model

Parameters Identification of Equivalent Model of Permanent Magnet Synchronous Generator (PMSG) Wind Farm Based on Analysis of Trajectory Sensitivity

A Steady-State Analysis Method for Modular Multilevel Converters Connected to Permanent Magnet Synchronous Generator-Based Wind Energy Conversion Systems

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