Research on Positioning Method of Low Frequency Oscillating Source in DFIG-Integrated System With Virtual Inertia Control

Ma, Jing; Zhao, Dong Mei; Shen, Yaqi; Phadke, A.G.

doi:10.1109/tste.2019.2937442

Cited by 17 publications

(8 citation statements)

References 16 publications

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“…These methods mimic the inertial and droop response of the conventional SGs, by adding an auxiliary loop to the power controller of the WTGs. The synthetic inertial control methods are classified as the frequency deviation-based methods [8][9][10][11][12][13][14][15][16][17][18] and step over-production methods [19][20][21][22][23][24][25][26]. The frequency deviation-based methods employ a feedback loop with a constant or adaptive gain [11,12] to compensate for the power mismatch.…”

Section: Literature Reviewmentioning

confidence: 99%

Closed‐loop fast primary frequency‐response of type‐3 wind power plants in low inertia grids

Nasirpour

Madani

Niroomand

et al. 2021

IET Renewable Power Gen

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This paper proposes a frequency-control scheme for Doubly Fed Induction Generator (DFIG)-based (Type-3) wind turbines to improve the primary-frequency-control when the grid power balance is disturbed. The increasing penetration level of renewable energy sources, like wind power plants, reduces the total available inertia of modern grids, which deteriorate the frequency response in case of sudden power-mismatches. The proposed closed-loop participation of wind power plant interacts with the thermal units to reduce the frequency nadir and frequency settling-time, during the inertial and primary stages. The designed disturbance observer decreases the uncertainties in the estimation of grid parameters, which results in robust PI performance in adjusting the ancillary power provided by wind turbines. Certain measures considered within the control loop to limit the rate-ofchange-of-frequency within the permissive range to avoid the protective relays tripping. Comparative simulations studies on modified IEEE 9-bus and 68-bus test systems verify the effectiveness and advantages of the proposed method.

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Section: Literature Reviewmentioning

confidence: 99%

Closed‐loop fast primary frequency‐response of type‐3 wind power plants in low inertia grids

Nasirpour

Madani

Niroomand

et al. 2021

IET Renewable Power Gen

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“…The integration of IC of DFIG-based WTs allows the speed of WTs to be coupled with the system frequency, which changes the dynamic characteristics of synchronous generators in electromechanical transient time scale. Accordingly, the integration of IC of DFIG-based WTs will change the low-frequency oscillation (LFO) characteristics of the system and affect the safe and stable operation of the power system [9][10][11][12]. At present, researchers have conducted research on the influence of the integration of the IC of DFIG-based WTs on the LFO characteristics of the system, but no unified and exact conclusion has been obtained.…”

Section: Introductionmentioning

confidence: 99%

Inertia Control Strategy of DFIG-Based Wind Turbines Considering Low-Frequency Oscillation Suppression

2021

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It has become a basic requirement for wind turbines (WTs) to provide frequency regulation and inertia support. The influence of WTs on the low-frequency oscillation (LFO) of the system will change after adopting inertia control methods. This paper intends to investigate and compare in detail the IC effects on LFO characteristics in two systems with different structures. First, the mechanism of inertia control of doubly fed induction generator (DFIG)-based WTs is analyzed. Then, the small-signal analysis method and modal analysis method are used to study the influence of the inertia control on the LFO characteristics based on the two-machine infinite-bus system and the four-machine two-area system, respectively. The difference in impact rules of IC on LFO is compared in detail. Finally, considering that the inertia control might worsen the LFO in some systems, an improved inertia control strategy of DFIG-based WTs is proposed to suppress the LFO. The simulation results demonstrate that, in systems with different structures, the impact rules of the inertia control parameters on LFO are different. With the improved inertia control strategy, DFIG-based WTs can suppress the LFO of the system and provide inertia support for the system.

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“…However, this method is utilized to analyse the transient stability of power systems and obtain good application results. Studies have focused on the transient stability of power systems, and they can also be used as a reference to solve the problem of LFO by using energy [18][19][20][21][22][23][24][25][26]. Energy function has been introduced into the analysis of LFO, but methods based on traditional energy function are utilized to directly analyse LFO; furthermore, most of them are based on external analysis in the time domain.…”

Section: Introductionmentioning

confidence: 99%

“…The algorithm is simple and easy to implement in engineering. Furthermore, energy function is used to solve the disturbance source identification of the forced power oscillation in power systems [19][20][21][22]. Energy function is combined with a small signal mode (SSM), and the concept of mode kinetic energy function is established [26].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dominant inter‐area oscillation path analysis of power systems with a high penetration of permanent magnet synchronous generator by using network mode energy

Liu

Zhang

et al. 2021

IET Generation Trans & Dist

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In this study, a network mode energy (NME) method is used to analyse the low‐frequency oscillation (LFO) of a power system with a high penetration of a permanent magnet synchronous generator (PMSG). This method is also utilized to determine the dominant inter‐area oscillation path. NME comes from a network potential energy based on a small signal mode, which includes a generator internal node mode potential energy and a line mode potential energy (LMPE). The exchange process and distribution of NME in the power system containing the PMSG are studied by analysing the composition of LMPE. A sensitivity index is constructed to determine the state variables of the generator and the PMSG, which remarkably influences energy distribution. Then, the path characteristics of LFO are analysed. The dominant inter‐area oscillation paths and energy interaction of the system connecting to the PMSG are determined. The proposed NME can be calculated on the basis of measurement information, and network energy decomposition is carried out using the measured line mode oscillation index. The mechanism of PMSG participating in oscillation is revealed from the network perspective to provide a basis for network‐based regulation. The correctness analysis and simulation of a four‐machine two‐area system with the PMSG and the New England 10‐machine 39‐bus system with the PMSG are carried out.

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Research on Positioning Method of Low Frequency Oscillating Source in DFIG-Integrated System With Virtual Inertia Control

Cited by 17 publications

References 16 publications

Closed‐loop fast primary frequency‐response of type‐3 wind power plants in low inertia grids

Closed‐loop fast primary frequency‐response of type‐3 wind power plants in low inertia grids

Inertia Control Strategy of DFIG-Based Wind Turbines Considering Low-Frequency Oscillation Suppression

Dominant inter‐area oscillation path analysis of power systems with a high penetration of permanent magnet synchronous generator by using network mode energy

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