A Reactive Power Sharing Strategy of VSG Based on Virtual Capacitor Algorithm

Xu, Huiling; Zhang, Xing; Liu, Fang; Shi, Rongliang; Yu, Cheng‐Chieh; Cao, Renxian

doi:10.1109/tie.2017.2686374

Cited by 99 publications

(62 citation statements)

References 21 publications

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“…The size and locations of the DGs affect the reactive power sharing, line losses and the voltage profile simultaneously [10], [18]. Arbitrary planning of DGs worsens the aforementioned parameters.…”

Section: Introductionmentioning

confidence: 99%

Optimal DG Allocation and Volt–Var Dispatch for a Droop-Based Microgrid

Gupta

Doolla

Chatterjee

et al. 2021

IEEE Trans. Smart Grid

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Section: Introductionmentioning

confidence: 99%

Optimal DG Allocation and Volt–Var Dispatch for a Droop-Based Microgrid

Gupta

Doolla

Chatterjee

et al. 2021

IEEE Trans. Smart Grid

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“…The inverter output voltage is expressed as Equation (1): In the microgrid system, except providing fundamental energy, distributed inverter can also output harmonic current I g,h to compensate the load harmonic current I load,h . There are already lots of research on the distributed inverter control and mainly focus on fundamental component [32][33][34]. In this section, harmonic current control model of the inverter with virtual resistor damping is established.…”

Section: Modelling Of the Inverter With Virtual Resistor Controlmentioning

confidence: 99%

“…The LCL parameter design method is not studied in this paper. Based on the parameter design method [33,34], this paper Energies 2018, 11, 2499 9 of 15 selects four different LCL parameters, as shown in Table 4. For each group, the grid-side inductance is equal to the inverter-side inductance.…”

Section: Effect Of Lcl Parameters On Performance Of the Reference Commentioning

confidence: 99%

Modeling and Enhanced Error-Free Current Control Strategy for Inverter with Virtual Resistor Damping

et al. 2018

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In microgrid, the grid-connected inverter current with the LCL (inductor-capacitor-inductor) output filter is amplified at certain frequencies. Using virtual resistor damping method can help suppress the amplification. By choosing an appropriate virtual resistor value, the model of the inverter current control loop is simplified as a 2 nd -order lowpass filter. Based on such simplified model, this paper proposes a design method of reference current compensation controller, which does not require decomposition of harmonic components. With the reference compensation, the inverter output current control precision is improved obviously. The simulation and experimental results verify the accuracy of the inverter simplified model and effectiveness of the reference compensation design method.

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“…Typically, grid-connected RE systems such as wind or solar adopt a more conventional grid feeding current control strategy [11]. One approach for enabling virtual inertia into wind turbines or solar systems is with the addition of localized BESS [12][13]. This solution, that is referred to as 'Unit'-VSG in this paper, is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Operation of Unified Power Flow Controller as Virtual Synchronous Generator

et al. 2020

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The continuous growth of Renewable Energy (RE) in the grid reduces system inertia and damping, impacting the overall stability of power systems. To alleviate this issue, "virtual" inertia can be provided by power electronics converters. Under this functionality they are controlled to emulate the behavior of rotating machines, operating as Virtual Synchronous Generators (VSGs). However, gridconnected inverters are susceptible to voltage and frequency disturbances which negatively affect their performance. Therefore, this paper introduces a Unified Power Flow Controller (UPFC) with VSG functionality that can compensate for voltage variations at the point of common coupling and provide a constant voltage reference for the connection of remote RE systems. The detailed controlled strategy together with the small-signal analysis are also developed in this work. The UPFC-VSG is compared with an equivalent Static Synchronous Compensator (STATCOM) with centralized energy storage also under VSG control to illustrate the major benefits of the UPFC-VSG. Validation of the analysis and the proposed control method is provided through simulation of a UPFC-VSG and a STATCOM-VSG supporting the grid-connection of a 100-MVA RE system. INDEX TERMS Unified Power Flow Controller (UPFC), Virtual Synchronous Generator (VSG), inertia emulation, renewable energy, power reference variations, grid disturbances, Static Synchronous Compensator (STATCOM) NOMENCLATURE D p Damping coefficient E m Voltage amplitude reference generated by VSG E m0 Static reference of E m E ref_se Voltage reference of series converter E ref_sh Voltage reference of shunt converter E ref_st Voltage reference of STATCOM f g Grid frequency f UPFC Frequency in UPFC-VSG f STATCOM Frequency in STATCOM-VSG I RES_ST Current amplitude of RES in STATCOM-VSG I RES_UPFC Current amplitude of RES in UPFC-VSG J p Virtual inertia coefficient k V Voltage regulation coefficient k vp , k vi PI in excitation voltage generator

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A Reactive Power Sharing Strategy of VSG Based on Virtual Capacitor Algorithm

Cited by 99 publications

References 21 publications

Optimal DG Allocation and Volt–Var Dispatch for a Droop-Based Microgrid

Optimal DG Allocation and Volt–Var Dispatch for a Droop-Based Microgrid

Modeling and Enhanced Error-Free Current Control Strategy for Inverter with Virtual Resistor Damping

Operation of Unified Power Flow Controller as Virtual Synchronous Generator

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