An active PID-based inertial control of a doubly-fed induction generator

Ahmad, Thelfa; Littler, Timothy; Naeem, Wasif

doi:10.1109/issc.2016.7528452

Cited by 3 publications

(9 citation statements)

References 14 publications

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“…In [20], an active inertial control approach for the frequency deviation ∆f loop for frequency regulation was presented. A frequency deviation loop was selected as it allows a greater total energy release [26].…”

Section: Fuzzy-logic Design and Control Systemmentioning

confidence: 99%

“…Following on the earlier work of the authors in [20], fuzzy membership functions and rule bases can be designed to provide appropriate online adjustment of feedback gains (as opposed to manual tuning), thus providing frequency support automatically for different situations or conditions, for example, uctuating wind speed. Frequency support can be divided into two groups: power reserve control and inertial control [29].…”

Section: Fuzzy-logic Design and Control Systemmentioning

confidence: 99%

“…is control strategy has been developed to use different values of deviation loop gains, based on previous work in [20]. However, the frequency deviation gain value is varied online as a function of the power system frequency deviations.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the proposed Adaptive Fuzzy-PD Inertial Control scheme is compared with the previous work in [20], which has been developed to utilise different values of the deviation for frequency regulation using variable gains in the frequency deviation loop for the inertial controller and loop control gains (active gains) based on change of frequency. e two approaches mentioned above preserve stable operation of a DFIG and increase the frequency nadir in comparison to conventional xed gain schemes.…”

Section: Introductionmentioning

confidence: 99%

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An Adaptive fuzzy-PD inertial control strategy for a DFIG wind turbine for frequency support

Ahmad

Littler

Naeem

2020

J. Appl. Mat. Tech.

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With increasing levels of wind generation in power systems, guaranteeing continuous power and system’s safety is essential. Frequency control is critical which requires a supplementary inertial control strategy. Since wind power generation depends directly on wind conditions, this creates an immense challenge for a conventional inertial controller with parameters suitable for all power grid operations and wind speed conditions. Therefore, tuning the controller gains is absolutely critical for an integrated conventional/renewable power system. Here, a fuzzy-logic adaptive inertial controller scheme for online tuning of the proportional-derivative-type (PD) inertial controller parameters is proposed. The proposed controller adapts the control parameters of the supplementary inertial control of the doubly fed induction generator (DFIG) wind turbine so that with any disturbance such as load changes, the active power output can be controlled to mitigate the frequency deviation. Simulation results indicate that the proposed adaptive controller demonstrates a more consistent and robust response to load changes compared to a conventional controller with fixed parameters.

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Section: Fuzzy-logic Design and Control Systemmentioning

confidence: 99%

Section: Fuzzy-logic Design and Control Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Adaptive fuzzy-PD inertial control strategy for a DFIG wind turbine for frequency support

Ahmad

Littler

Naeem

2020

J. Appl. Mat. Tech.

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“…A selection of these and other DFIG wind turbine controllers proposed for inertial frequency response are summarized for their general qualities and performance capability in Table . Other controllers operate on torque or power commands with slow cascaded control and may have operating power headroom requirements .…”

Section: Introductionmentioning

confidence: 99%

Model‐based control addition to prescribe DFIG wind turbine fast frequency response

David

Prevost²,

Xavier³

et al. 2019

Wind Energy

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This paper investigates the physical capability of double-fed induction generator (DFIG) wind turbines for inertial support of frequency response. Frequency stability is modeled using the DFIG electromechanical and generator controller dynamics, and a destabilizing effect is demonstrated in low-inertia systems. To improve response, a synchronous reference frame DFIG controller is proposed that acts by following low-frequency grid dynamics and adds a fast acting proportional plus integral (PI)-controlled frequency-responsive component to existing qd current commands. The proposed controller is derived in a straightforward manner using only the DFIG dynamic equations and is designed using pole/zero placement techniques. Laboratory experiments using a micro-scale DFIG wind turbine with hub-emulating flywheel prove better capability for transient frequency regulation even under extreme load change. The result is a DFIG controller that balances the appearance of transients in electrical and mechanical systems.Value is achieved in providing immediate continuous inertial response to support load change.The proposed frequency response can improve the use of existing physical inertia from wind turbines. KEYWORDS flywheel, frequency control, inertia, wind energy generation, wind power control, wind turbine generators 1 INTRODUCTION Decreasing inertia is one of the major obstacles to enabling very high penetration of renewable energy sources in future power systems. 1 Renewable energy resources with power electronic (PE) interface are reducing power system physical inertia and increasing susceptibility to voltage angle instability. 2,3 Wind turbines with a double-fed induction generator (DFIG) and PE back-to-back (B2B) converter are so-called ''Type-III'' machines. The power system is partially coupled to the massive rotor hub assembly by stator windings; the other portion is coupled to PE-connected rotor terminals. Wind turbines with DFIGs are a popular resource and may become the only source of electromechanical coupling between the power system and rotating mass. Their physical dynamics and control dynamics both influence their frequency response, and their characteristics are critical to stability. This paper seeks to understand the problems associated with DFIG wind turbine frequency response and aims to improve the use of their physical inertia in frequency regulation.Prior work in this field suggests that DFIGs possess sufficient capability for inertial frequency response when neglecting influence of control. 4It is now hypothesized that through the flexibility of PE control, the DFIG can be made to offer its inertia to frequency response in an innovative and more effective way. This paper goes beyond generator modeling and evaluates the frequency response of DFIG control. Linearized transfer functions are derived using the DFIG dynamic model and its respective control laws. They reveal how conventional DFIG control action degrades the response. A PI controller is then derived from the DFIG dynamic model to correct a...

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The nature of double-fed induction generators for frequency and voltage support from wind turbines

David¹

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An active PID-based inertial control of a doubly-fed induction generator

Cited by 3 publications

References 14 publications

An Adaptive fuzzy-PD inertial control strategy for a DFIG wind turbine for frequency support

An Adaptive fuzzy-PD inertial control strategy for a DFIG wind turbine for frequency support

Model‐based control addition to prescribe DFIG wind turbine fast frequency response

The nature of double-fed induction generators for frequency and voltage support from wind turbines

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