Fully-Distributed Deloading Operation of DFIG-Based Wind Farm for Load Sharing

Dong, Zhen; Li, Zhongguo; Dong, Yi; Jiang, Shuoying; Ding, Zhengtao

doi:10.1109/tste.2020.3002690

Cited by 33 publications

(22 citation statements)

References 43 publications

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“…However, with RES, especially wind generators, to minimize the overall cost, the main goal was to maximize power generation using MPPT [3]- [19], [4], and this leaves no room for active power regulation in case of grid incident. Hence, a new method emerged, which try to reserve an amount of energy by regulating the produced energy at lower level than MPPT, called deloading control [4], [18], [40]- [43].…”

Section: A Droop Control With Deloading Methodsmentioning

confidence: 99%

“…This P mref will be used to determine desired generator speed Ω ref , and through generator speed control to shift the operating point of wind turbine. This action can easily be achieved by a look-up table [4] [40] - [43], but with a cost in delay due to the time for searching the equivalent value of Ω ref . To overcome this, because the two points of optimal and deloading points are very close, it is possible to consider that the three points A, B and C are collinear.…”

Section: A Droop Control With Deloading Methodsmentioning

confidence: 99%

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A System Model-Based Approach for the Control of Power Park Modules for Grid Voltage and Frequency Services

Marinescu,

Kamal,

Ngo

2021

Preprint

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A new control approach is proposed for the grid insertion of Power Park Modules (PPMs). It allows full participation of these modules to ancillary services. This means that, not only their control have some positive impact on the grid frequency and voltage dynamics, but they can effectively participate to existing primary and secondary control loops together with the classic thermal/inertia synchronous generators and fulfill the same specifications both from the control and contractual points of view.To achieve such level of performances, a system approach based on an innovatory control model is proposed. The latter control model drops classic hypothesis for separation of voltage and frequency dynamics used till now in order to gather these dynamics into a small size model.From the system point of view, dynamics are grouped by timescales of phenomena in the proposed control model. This results in more performant controls in comparison to classic approaches which orient controls to physical actuators (control of grid side converter and of generator side converter). Also, this allows coordination between control of converters and generator or, in case of multimachines specifications, among several PPMs.From the control synthesis point of view, classic robust approaches are used (like, e.g., H-infinity synthesis).Implementation and validation tests are presented for wind PPMs but the approach holds for any other type of PPM.These results will be further used to control the units of the new concept of Dynamic Virtual Power Plant introduced in the H2020 POSYTYF project.

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Section: A Droop Control With Deloading Methodsmentioning

confidence: 99%

Section: A Droop Control With Deloading Methodsmentioning

confidence: 99%

A System Model-Based Approach for the Control of Power Park Modules for Grid Voltage and Frequency Services

Marinescu,

Kamal,

Ngo

2021

Preprint

View full text Add to dashboard Cite

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“…For example, Ghosh et al propose a farm control framework for primary frequency and inertial response for a high wind penetration power system supporting frequency regulation during subsynchronous and super-synchronous operation of the wind farm [96]. Dong et al propose a fully distributed power regulation method for DFIG-based wind farms in which wind turbines share the load based on local information in order to guarantee that overspeeding control takes priority [97].…”

Section: Proposed Solutions Without An Energy Storage Systemmentioning

confidence: 99%

Provision of Frequency Response from Wind Farms: A Review

et al. 2021

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Renewable sources of energy play a key role in the process of decarbonizing modern electric power systems. However, some renewable sources of energy operate in an intermittent, non-dispatchable way, which may affect the balance of the electrical grid. In this scenario, wind turbine generators must participate in the system frequency control to avoid jeopardizing the transmission and distribution systems. For that reason, additional control strategies are needed to ensure the frequency response of variable-speed wind turbines. This review article analyzes diverse control strategies at different levels which are aimed at contributing to power balancing and system frequency control, including energy storage systems.

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“…In the other words, centralized control becomes overwhelmed since WTs have been widely dispersed in physical layer while the communication in information layer is still centralized. In contrast, the distributed control has its advancements for such large-scale multi-agent situations, which achieves the consistency between the information layer and the physical layer [17]. In this case, there is only limited-distance communication with adjacent neighbors for cooperation, rather than large amounts of communication with the remote controller, thus avoiding the above problems of centralized framework.…”

Section: Introductionmentioning

confidence: 99%

Coordination Strategy of Large-Scale DFIG-Based Wind Farm for Voltage Support With High Converter Capacity Utilization

Dong

et al. 2021

IEEE Trans. Sustain. Energy

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Due to the long-distance transmission, external grid cannot effectively support the access point voltage (APV) of the large-scale wind farm (WF), which thus entails DFIGbased WF to provide its ancillary services on reactive power generation. Considering factors of limited down-sized converter capacity, various operating modes of wind turbines (WTs), and the large pressure of large-scale WF communication on the central governor, this paper proposes a distributed active power and reactive power coordination scheme for APV support. A reactive power self-allocation scheme is developed and operated in each WT for reactive power dispatch. Based on the mechanism of distributed consensus control and aligning with the principle of preferential and proportional utilization of spare reactive power capacity (RPC), the proposed method collaborates the rotor side converters and the grid side converters of all WTs but without the necessity of knowing the total RPC. Further, in case that the total RPC is insufficient for the demand, a coordinating factor for RPC extension is generated to weaken the active power. Through a current-enforced PQ coordinating loop, it guarantees a high utilization of converter capacity as well as an exact compensation on the reactive power imbalance, which thereby reduces the wind power curtailment for the RPC release. Several case studies verify the effectiveness of the proposed method.

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Fully-Distributed Deloading Operation of DFIG-Based Wind Farm for Load Sharing

Cited by 33 publications

References 43 publications

A System Model-Based Approach for the Control of Power Park Modules for Grid Voltage and Frequency Services

A System Model-Based Approach for the Control of Power Park Modules for Grid Voltage and Frequency Services

Provision of Frequency Response from Wind Farms: A Review

Coordination Strategy of Large-Scale DFIG-Based Wind Farm for Voltage Support With High Converter Capacity Utilization

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