On deloading control strategies of wind generators for system frequency regulation

Bao, Yu-Qing; Li, Yang

doi:10.1002/etep.1855

Cited by 22 publications

(18 citation statements)

References 19 publications

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“…The application of WTG as one of distributed generation source to deal with power imbalance during islanding based upon islanding security region has been presented in [17]. A work on deloading control strategies of wind generators for power system frequency regulation to improve the deloading control method that enhanced both stability and effectiveness has been presented in [18]. A study and analysis of power system frequency response from fixed speed and doubly fed induction generator based wind turbines is presented in [19].…”

Section: Introductionmentioning

confidence: 99%

Modified Deloading Strategy of Wind Turbine Generators for Primary Frequency Regulation in Micro-Grid

Kumar

Sharma

Mathur

et al. 2020

Technol Econ Smart Grids Sustain Energy

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In this work, the contribution of wind turbine generator (WTG) to support micro-grid (MG) during depressed frequency condition has been studied with a modified strategy for improving the primary load frequency response of MG. The majority of existing deloading techniques to estimate the reference power are based on the linear relationship. Hence they are not so accurate to mimic the actual speed versus power dynamics of turbine rotor during deloading operation which is inherently nonlinear in nature. In this work, the existing methods have been analyzed in detail with an aim to improve the performance. Based on the analysis a modified deloading method assuming non-linear relation between rotor speed and power of WTG system has been proposed which shows the improved load frequency response in MG. The proposed deloading technique is simulated and validated using real-time digital simulator (OP4510) for the variation in load and generation inside an islanded MG. The results obtained using modified deloading method are compared with existing deloading method and it is found that proposed deloading method handles the non-linearity of the system during deloading operation and also it contributes more power to MG in response to load demand at the cost of slight increase in the speed of turbine rotor.

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Section: Introductionmentioning

confidence: 99%

Modified Deloading Strategy of Wind Turbine Generators for Primary Frequency Regulation in Micro-Grid

Kumar

Sharma

Mathur

et al. 2020

Technol Econ Smart Grids Sustain Energy

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“…In order to provide frequency control, large wind farms are often operated in de-loading mode. In this circumstance, the power generation is maintained below the available power to keep an amount of power, known as power reserve, which can be used for primary frequency support [3]. During de-loading operation, the power contributions from the turbines within the farm can be regulated for achieving different objectives.…”

Section: Introductionmentioning

confidence: 99%

Partitioning approach for large wind farms: Active power control for optimizing power reserve

Siniscalchi-Minna

Ocampo‐Martínez

Bianchi

et al. 2018

2018 IEEE Conference on Decision and Control (CDC)

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“… uses the inertia and droop control for frequency regulation with the DFIG. In the literature, the power loss of the DFIGs is ignored. The transmission system is not considered; thus, the WTGs directly face the SGs.…”

Section: Introductionmentioning

confidence: 99%

Improved dynamic power flow model with DFIGs participating in frequency regulation

Zhang

Wang

2017

Int Trans Electr Energ Syst

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Summary The primary frequency regulation of the DFIGs is newly introduced to dynamic power flow to analyze the post‐disturbance power flow and system frequency. Based on the overspeed/pitch angle control, the equivalent inertia of the DFIGs is quantified by their inherent inertia and the adjustable range of the rotor speed, which together with the inertia of the SGs determines the system frequency. With simultaneous solution to the constraints of the DFIGs and power system, the captured power by the wind turbine, the rotor speed, and the slip of the DFIGs are adjusted in dynamic power flow, thus to quantify power loss and active output of the DFIGs, and avoid optimistic judgment to the frequency regulation capability of the DFIGs. With increasing wind power, the wind turbine generators are expected to participate in the frequency regulation to save the burden of synchronous generators (SGs). The primary frequency regulation of doubly fed induction generator (DFIG) using the dynamic power flow is proposed. The equivalent inertia of the DFIG is decided by the inherent inertia and the rotor speed. Its captured power and rotor speed respond to the change of the system frequency. The constraints of the DFIG and power system are solved simultaneously to quantify the active loss of the DFIG. Then, the power flow is solved alternatively with the dynamic equation describing system frequency. The numerical results validate the feasibility of the proposed model and quantify the frequency‐support capability of the DFIG. The proposed model helps to balance the utilization of wind power with the stability of system frequency, while reducing the reserve requirement to the SGs.

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On deloading control strategies of wind generators for system frequency regulation

Cited by 22 publications

References 19 publications

Modified Deloading Strategy of Wind Turbine Generators for Primary Frequency Regulation in Micro-Grid

Modified Deloading Strategy of Wind Turbine Generators for Primary Frequency Regulation in Micro-Grid

Partitioning approach for large wind farms: Active power control for optimizing power reserve

Improved dynamic power flow model with DFIGs participating in frequency regulation

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