A Novel Virtual Synchronous Generator Control of PMSG-Based Wind Generation System to Enhance Transient Stability of Power System

Imai, Hidetaka; Orihara, Dai; Iioka, Daisuke; Saitoh, Hiroumi

doi:10.1109/egrid.2018.8598690

Cited by 4 publications

(5 citation statements)

References 7 publications

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“…According to (14), converting the three-phase output voltage signal to two phase dq axis reference frame. The θ adopts VSG output phase angle.…”

Section: The Model Of Voltage-current Double Closed Loopmentioning

confidence: 99%

“…Applying the Laplace transform to (14), the frequency domain expression of output voltage in dq axis reference frames can be obtained as Similarly, the frequency domain expression of the inductor current can be obtained (see (A.12) and (A.13)).…”

Section: The Model Of Voltage-current Double Closed Loopmentioning

confidence: 99%

“…Then, the subsynchronous oscillation occurs with resonance divergence under the equivalent negative damping impact of phase-locked loop [13]. To avoid the negative damping impact and provide inertia support to the power system, the grid-forming VSG control was proposed to apply in the grid-side converter of D-PMSG [14,15].…”

Section: Introductionmentioning

confidence: 99%

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Suppression Strategy of Subsynchronous Oscillation Based on Dynamic Voltage Compensation Control for Grid-Forming D-PMSG in Weak Grid

Chen,

Ren,

et al. 2023

International Journal of Energy Research

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The virtual impedance can suppress the low-frequency oscillation effectively caused by the power coupling effect for the grid-forming direct-drive permanent magnet synchronous generator (D-PMSG). However, there are few studies on the influence of virtual impedance on the subsynchronous oscillation caused by the interaction between the grid-forming D-PMSG and the weak grid. In this paper, the mechanism of virtual impedance improving the stability of virtual synchronous generator (VSG) control for the converter is revealed from the perspective of power coupling, and the influence of virtual impedance on the system stability in subsynchronous frequency range was analysed based on the sequence impedance model. The analysis results show that the virtual inductance cannot effectively improve the oscillation suppression effect, but the virtual resistance can greatly improve the damping characteristics of the system which has a good oscillation suppression effect. However, excessive increase in virtual resistance will cause power coupling oscillation, even subsynchronous oscillation, which shows limitations in subsynchronous oscillation suppression. To solve the problem, a dynamic voltage compensation control method based on active disturbance rejection control (ADRC) was proposed, and the parameters are designed by bandwidth method. The method can suppress the subsynchronous oscillation effectively in a certain frequency range under different grid strength and disturbance conditions. And it shows strong adaptability and good system robustness in weak grid. Finally, the effectiveness of the proposed oscillation suppression strategy was verified by time domain simulation.

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“…According to (14), converting the three-phase output voltage signal to two phase dq axis reference frame. The θ adopts VSG output phase angle.…”

Section: The Model Of Voltage-current Double Closed Loopmentioning

confidence: 99%

Section: The Model Of Voltage-current Double Closed Loopmentioning

confidence: 99%

See 1 more Smart Citation

Suppression Strategy of Subsynchronous Oscillation Based on Dynamic Voltage Compensation Control for Grid-Forming D-PMSG in Weak Grid

Chen,

Ren,

et al. 2023

International Journal of Energy Research

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“…Therefore, in recent years, many works have tried to exploit the advantage of SCs by introducing grid-forming technology, such as virtual synchronous generators (VSG) [6,7]. The VSG controller introduces the motion equation of the generator rotors and incorporates a linearly simplified mathematical model of the synchronous generator (SG) into the control of the inverter [8,9], i.e., active powerfrequency [10], reactive power-voltage [11], and virtual inertia characteristics [12]. This enables the renewable generation to mimic, in whole or in part, the proactive control characteristics of the SG from the external characteristics [13][14][15] by directly regulating the voltage vector's phase and amplitude as a conventional grid-forming resource.…”

Section: Introductionmentioning

confidence: 99%

A Novel Grid-Forming Strategy for Self-Synchronous PMSG under Nearly 100% Renewable Electricity

Hu,

Jiang,

et al. 2023

Energies

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The demand for decarbonization calls for building up a nearly 100% renewable electricity resulting in Grid-forming (GFM) capability requirements. The foregoing paradigm shifts from synchronous AC systems to converter-based systems that need to remain stable and self-synchronous while providing GFM services. However, as this article’s analysis in the introduction, achieving such goals inevitably necessitates the implementation of a PLL controller and energy storage in a wind turbine, whereas it is not suitable to operate in a weak energy system. To tackle this issue, a novel grid-forming method is proposed. The suggested idea calls for creating a DC voltage controller in a grid-side converter that mimics inertia response and applying a Rotor kinetic energy storage (RKES) controller in a Generator-side converter. Moreover, a coordinated controller of RKES controllers and conventional low voltage ride-through (LVRT) is proposed to gain increases in dynamic performance and maintain grid-forming capabilities in the transient process. Extensive modeling, experimental results based on a semi-physical platform, and an actual wind farm demonstration project are provided to validate the proposed controls. The results demonstrate the effectiveness of the presented method when applied to the future 100% renewable electricity.

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“…ES increases the operation and maintenance workload after installation. The occupied space, geographical location, and machine requirements in the primary component of the original CC equipment restrict the application of ES and hence increase the potential challenges of CV sources used for wind turbines and PV (Imai et al, 2018). Therefore, a proposal for a grid-forming plan for each RE unit without the addition of energy storage is both promising and necessary.…”

Section: Introductionmentioning

confidence: 99%

A Novel Grid-Forming Strategy for Voltage-Source Controlled PV Under Nearly 100% Renewable Electricity

Hu¹,

Jiang²,

et al. 2022

Front. Energy Res.

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The demand for decarbonization calls for nearly 100% renewable electricity rising as the dominant power resource. The foregoing paradigm shifts require proactive voltage and frequency controllers for the converter-based renewable energy. This article proposed a novel grid-forming technique for voltage-source controlled photovoltaic (PV) operating in 100% renewable power systems. The proposed idea was to design a DC voltage collapse-prevention controller in conjunction with a simplified frequency and inertia controller, thereby smart capturing and releasing PV energy to achieve improvements in dynamic performance and efficiency. By setting the two-phase operation scheme, the model initiatively considers the conflict between frequency regulation and maximum power point tracking (MPPT) curve control. The preferred controls are validated using extensive simulation and experimental findings based on a semi-physical platform and a practical photovoltaic demonstration project. The proposed controller outperforms the standard PV current controller over a much larger range of weak grid situations, according to the experimental and engineering operational data. Results demonstrated the effectiveness of the presented method in applying to the future 100% renewable power system.

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A Novel Virtual Synchronous Generator Control of PMSG-Based Wind Generation System to Enhance Transient Stability of Power System

Cited by 4 publications

References 7 publications

Suppression Strategy of Subsynchronous Oscillation Based on Dynamic Voltage Compensation Control for Grid-Forming D-PMSG in Weak Grid

Suppression Strategy of Subsynchronous Oscillation Based on Dynamic Voltage Compensation Control for Grid-Forming D-PMSG in Weak Grid

A Novel Grid-Forming Strategy for Self-Synchronous PMSG under Nearly 100% Renewable Electricity

A Novel Grid-Forming Strategy for Voltage-Source Controlled PV Under Nearly 100% Renewable Electricity

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