Instantaneous power calculation based on intrinsic frequency of single-phase virtual synchronous generator

Zhao, Yangyang; Chai, Jianyun; Wang, Shien; Sun, Kai

doi:10.1007/s40565-017-0272-5

Cited by 9 publications

(7 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the ratio of grid resistance R l and inductance L l of AC system in Fig. 1, r R/X is defined by (11).…”

Section: ) Impact Of Voltage Level On Stabilitymentioning

confidence: 99%

“…However, IGs equipped with this control do not have grid-forming ability.Therefore, they are not able to work in stand-alone mode. To make IGs possess grid-forming ability, another control method, called virtual synchronous generator (VSG) [9], or virtual synchronous machine [10], or synchronous converter [11], was proposed for IGs to implement inertia response by emulating the swing equation of synchronous generators (SGs). To facilitate the explication, all methods with the idea of emulating swing equation are called VSG control in this paper.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of Different Virtual Inertia Control Methods for Inverter-based Generators

Sun

Liu

Shunan

et al. 2020

Journal of Modern Power Systems and Clean Energy

View full text Add to dashboard Cite

With the rapid development of inverter-based generators (IGs), power grid is faced with critical frequency stability challenges because the existing IGs have no inertia. To equip IGs with inertial response, researchers have proposed several virtual inertia control methods, which can be classified into two categories: virtual synchronous generator (VSG) control and droop control based on rate of change of frequency (ROCOFdroop control). In this paper, the comparison between both virtual inertia control methods is conducted from three perspectives: mathematical model, output characteristic and small-signal stability. State-space models are firstly built to analyze the control mechanism of VSG control and ROCOF-droop control methods. Simulation and eigenvalue analysis are conducted to study the transient responses and oscillation characteristics of both methods, which is helpful to understand the advantages and limitations of existing virtual inertia control methods. Finally, the obtained theoretical results are validated through realtime laboratory (RT-LAB) hardware-in-loop simulation platform.

show abstract

“…As the ratio of grid resistance R l and inductance L l of AC system in Fig. 1, r R/X is defined by (11).…”

Section: ) Impact Of Voltage Level On Stabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of Different Virtual Inertia Control Methods for Inverter-based Generators

Sun

Liu

Shunan

et al. 2020

Journal of Modern Power Systems and Clean Energy

View full text Add to dashboard Cite

show abstract

“…According to the inverse Park transformation, the grid current error e i𝛼 assigned to the 𝛼 axis is given by, e i𝛼 = e id cos 𝜃 − e iq sin 𝜃 (14) where e id and e iq are the error signals in the synchronous reference frame. Substituting Equation ( 14) into (13) yields,…”

Section: Unbalanced Synchronous Reference Frame Controlmentioning

confidence: 99%

“…FIGURE13 Experimental results of the DQ control scheme with a deadtime of 1 μs under the distorted PCC voltage…”

mentioning

confidence: 99%

High performance current control of single‐phase grid‐connected converter with harmonic mitigation, power extraction and frequency adaptation capabilities

Somkun

2020

IET Power Electronics

View full text Add to dashboard Cite

Grid-connected converters in distributed generation systems are required to operate under highly distorted voltage with a wide frequency range, and to provide active/reactive power information for ancillary services and power control. This paper presents multiple unbalanced synchronous reference frame control for regulating and mitigating the grid current distortion of a voltage source converter caused by grid voltage distortion and converter deadtime. The proposed control technique has intrinsic power extraction and frequency adaptation capabilities. The multiple unbalanced synchronous reference frame control is compared with the proportional multi-resonant control. A new controller which combines the unbalanced synchronous reference frame control for regulation of the fundamental component current and the multi-resonant control for harmonic compensation is presented. The proposed control techniques were verified with a 1.5-kVA LCL-filtered grid connected inverter. The multiple unbalanced synchronous reference frame control with odd harmonic orders 3rd to 13th exhibited excellent harmonic rejection with a total harmonic distortion (THD) less than 0.60% under a highly distorted voltage. The proposed combined control technique provided slightly inferior performance with the grid current THD less than 0.65%. The combined control scheme retains functionalities as the multiple unbalanced synchronous reference frame control with a significant reduction of computational effort. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

“…Referents (Zhang et al, 2017;Wang et al, 2018) illustrates an adaptive adjustment system damping ratio scheme to suppress the power and frequency oscillations, the dynamic performances of the VSG are enhanced. Reference (Zhao et al, 2017) presents a method based on virtual power calculation to realize the seamless transfer between islanded/grid-connected mode and enhance the stability of single-phase microgrid.…”

Section: Introductionmentioning

confidence: 99%

An Inductor Current Sensorless Control Strategy Based on Modified VSG Method for Single-Phase Microgrid Application With Seamless Transfer Capability

Zhang

Zheng

et al. 2021

Front. Energy Res.

View full text Add to dashboard Cite

This paper proposes an inductor current sensorless control strategy based on modified virtual synchronous generator (VSG) method for single-phase inverter-interfaced microgrid application. Firstly, the outer power loop with Q-U integral term is presented for output reactive power enhancement, and an inner voltage regulation loop based on luenberger state observer is proposed to reduce the inductor current sensor. Meanwhile, in order to improve the response speed of the observer, the luenberger observer is designed based on the optimal pole assignment method. Secondly, a seamless switching strategy based on the modified VSG method is proposed, which can realize the seamless transition between the island mode and grid-connected mode. Finally, a single-phase 3kW VSG prototype is built, and the effectiveness and correctness of the proposed control strategy is verified by the simulation and experimental results.

show abstract

Instantaneous power calculation based on intrinsic frequency of single-phase virtual synchronous generator

Cited by 9 publications

References 14 publications

Comparison of Different Virtual Inertia Control Methods for Inverter-based Generators

Comparison of Different Virtual Inertia Control Methods for Inverter-based Generators

High performance current control of single‐phase grid‐connected converter with harmonic mitigation, power extraction and frequency adaptation capabilities

An Inductor Current Sensorless Control Strategy Based on Modified VSG Method for Single-Phase Microgrid Application With Seamless Transfer Capability

Contact Info

Product

Resources

About