Issues in the grid frequency regulation with increased penetration of wind energy systems

Vidyanandan, K. V.; Senroy, Nilanjan

doi:10.1109/sces.2012.6199054

Cited by 11 publications

(8 citation statements)

References 11 publications

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“…This is because; the imbalance power between load and generation will change the dynamic behaviour of system frequency. The mathematical expression of wind power, P WT, is expressed as in (1). As shown in (2) expressed the relationship of all the power involved in Figure 1 to serve the load L1 and L2.…”

Section: Derivation Of Supercapacitor and Buck Boost Convertermentioning

confidence: 99%

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Virtual inertia support for wind turbine system

Hasan¹,

Rosmin²,

Nordin

et al. 2020

IJEECS

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Previously, a conventional synchronous generator is adapted into the wind energy conversion system to supply the required inertial support; however its slow behaviour may worsening the stability problem of the system during frequency event. In this paper, a new approach that enables virtual inertial support from supercapacitor during sudden load increase e.g. when wind turbine experiencing sudden wind or load changes is presented. Here, a new approach that can regulate the system frequency by controlling the charging and discharging process of supercapacitor is demonstrated. Hence, an algorithm on how to derive the behavior of supercapacitor and power converter is presented. From the simulation results, it has been found that this proposed approach successfully reduces the frequency nadir and ROCOF of the system frequency. It also able to avoid the second frequency dips during frequency recovery time.

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Section: Derivation Of Supercapacitor and Buck Boost Convertermentioning

confidence: 99%

“…In recent years, wind energy had shown a great development in its generation system [1]. Integrating variable speed wind turbine into the grid system can reduce the frequency response and power damping capability of wind turbine.…”

Section: Introductionmentioning

confidence: 99%

Virtual inertia support for wind turbine system

Hasan¹,

Rosmin²,

Nordin

et al. 2020

IJEECS

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“…wind power is extremely unstable in practical applications, thus causing several problems in the use of wind power generation systems. One of the most prominent problems is the instability of wind speed . Dursun et al used wind energy storage systems to overcome the instability of wind speed based on Turkish power requirements …”

Section: Introductionmentioning

confidence: 99%

“…One of the most prominent problems is the instability of wind speed. [12][13][14][15][16][17][18] Dursun et al used wind energy storage systems to overcome the instability of wind speed based on Turkish power requirements. 19 In the late 1970s, the idea of using a hydraulic transmission system in wind turbines was proposed and tested with a 3MW wind turbine.…”

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confidence: 99%

Combined constant speed control method for a wind generator equipped with hydraulic energy storage

et al. 2019

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A wind generator equipped with hydraulic energy storage (WG-HES) uses hydraulic transmission systems instead of gearbox transmissions, thus eliminating high-power converters and reducing the tower-top cabin weight. When there is no wind or the wind speed is extremely low, the pressured oil released by accumulators is used to drive a motor to operate at a constant speed, thereby generating constant-frequency power. However, few studies have examined the constant speed control characteristics for generating electricity using only an accumulator group. In this study, a combined constant speed (CCS) proportional-integral-derivative (PID) control method based on "variable displacement and throttling" is proposed, which includes two closed loops and one regulating loop. First, a simulation model of the CCS PID control method for a variable motor was established in the Simcenter Amesim program. The influence of different PID parameters on the anti-interference ability of the constant speed control of the motor was analyzed under a given load step. Then, we obtained the range of control parameter values and a set of optimal values. Second, the effectiveness of the CCS control method and the accuracy of the simulation results were verified on a 600-kW WG-HES system prototype. The results verified that the CCS control method has good anti-interference ability and can meet the requirements of constant speed control for a variable motor under the best PID parameters. These results can provide a basis for developing control strategies for WG-HESs when there is no wind or at low wind speeds. KEYWORDS accumulator-controlled hydraulic motor, anti-interference, combined constant speed control, hydraulic energy storage | INTRODUCTIONRenewable energy is becoming increasingly prominent owing to the rising insufficiency of fossil fuels to meet the demands of the growing global population. 1-5 Solangi et al. revealed that wind energy is the most feasible renewable energy resource for electricity generation, 6 and the proportion of wind energy in the energy market is increasing continuously. 7 Significant advances in wind turbine manufacturing have enabled lowering the production costs of devices for harvesting wind energy, and the application range of wind power generation equipment has broadened. 8,9 Conventional wind turbines use gears and gearboxes to transfer energy. However, such systems have a high risk of failure and heavy cabins, both of which result in high maintenance costs. 1,10,11 Therefore, direct-drive wind turbines were developed, but these systems require a large-

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“…However, with the increasing percentage of wind energy into the network, new challenges with regards to the functioning of the current power system are emerging. Reference [1] presents some of the issues being encountered in the system frequency regulation function when the penetration level of wind energy in the electric grid increases considerably. Frequency control is essential for a secure and stable operation of any power system.…”

Section: Introductionmentioning

confidence: 99%

Review of Inertial Control Methods for DFIG-Based Wind Turbines

Wu¹,

Shu²,

Hsieh³

et al. 2015

IJOEE

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Due to the fact the control system of DFIG is not based on the power system frequency, the whole inertia of the power system is reducing rapidly with the penetration of wind generation increasing. This is extremely bad for the stability of the system frequency. The capability of doubly fed induction generator (DFIG) to participate in the primary frequency regulation is discussed in this paper. This paper reviews some studies about the inertia control and droop control for DFIG-based wind turbine.  Index Terms-doubly fed induction generator, inertia control, droop control, maximum power point tracking working in the area of wind turbine modeling, wind power systems, offshore wind farm planning, renewable energy forecasting techniques, power system control and management, distributed generation, and smart grid control.

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Issues in the grid frequency regulation with increased penetration of wind energy systems

Cited by 11 publications

References 11 publications

Virtual inertia support for wind turbine system

Virtual inertia support for wind turbine system

Combined constant speed control method for a wind generator equipped with hydraulic energy storage

Review of Inertial Control Methods for DFIG-Based Wind Turbines

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