FRT Capability Enhancement of Autonomous AC/DC Hybrid Microgrid by Coordinated MSDBR and Interlinking Converter Control Strategy

Keshavarzi, Morteza Daviran; Ali, Mohd. Hasan

doi:10.1109/isgt.2019.8791661

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…During abnormal conditions the rotor side converters have to disconnect otherwise undesirable voltage fluctuations will occur in the stator. For solving these issues high power braking resistors and each phase consisting of two parallel IGBTs are proposed in Modulated SDBR [13]. By using constant frequency pulse width modulation the excessive power will dissipate and maintain the terminal voltages.…”

Section: B Series Dynamic Braking Resistorsmentioning

confidence: 99%

Challenges and Solutions for LVRT Problem in DFIG Machines based Wind Turbines

PRAKASH¹

2022

Preprint

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Section: B Series Dynamic Braking Resistorsmentioning

confidence: 99%

Challenges and Solutions for LVRT Problem in DFIG Machines based Wind Turbines

PRAKASH¹

2022

Preprint

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“…However, when a traditional SDBR is activated, the back-to-back converter has to be disabled due to the hardship in synchronizing stator voltage, and the variable frequency switching scheme may result in undesirable voltage quality [42]. To solve these problems, a modulated series dynamic braking resistor (MSDBR) was proposed, which comprises a high-power braking resistor and two parallel IGBTs for each phase [43]. The MSDBR is also connected in series with the stator and grid, and this device is controlled by the fixed frequency Pulse-Width Modulation (PWM) signals to dissipate excessive power and maintain the terminal voltage magnitude in a desirable range.…”

Section: Series Dynamic Braking Resistormentioning

confidence: 99%

Low-Voltage Ride-Through Techniques in DFIG-Based Wind Turbines: A Review

Qin

Zhou

et al. 2020

Applied Sciences

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In recent years, considerable advances were made in wind power generation. The growing penetration of wind power makes it necessary for wind turbines to maintain continuous operation during voltage dips, which is stated as the low-voltage ride-through (LVRT) capability. Doubly fed induction generator (DFIG)-based wind turbines (DFIG-WTs), which are widely used in wind power generation, are sensitive to disturbances from the power grid. Therefore, several kinds of protection circuits and control methods are applied to DFIG-WTs for LVRT capability enhancement. This paper gives a comprehensive review and evaluation of the proposed LVRT solutions used in DFIG-WTs, including external retrofit methods and internal control techniques. In addition, future trends of LVRT solutions are also discussed in this paper.

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“…In small/medium-sized HMGs with aggregated load/generation nodes, a consolidated BESS may be linked to the PCC of AC or DC subgrid, or to the critical load bus to supply energy storage services to the whole HMG. For a typical HMG design including the BESS devices at ACg and DCg, 3,44 the grid operators might be concerned to realize the impact of storage location on the performance of the grid operating with only one storage device online. In this context, when running with ACB or DCB, the HMG exhibits dissimilar dynamic performance during different operating conditions and disturbances due to the storage location and the ILC control strategy that differs correspondingly.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of hybrid AC / DC microgrid under influence of battery energy storage location

Keshavarzi

Ali

2021

Int Trans Electr Energ Syst

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In microgrids, energy storage is generally located based on power management criteria and economic objectives that lean on the system's steady-state operation. However, the grid configuration, dynamics of primary energy sources, and storage type (AC or DC) impact its transient operation. This paper conducts a comparative study of the dynamic performance of Hybrid AC/DC Microgrids (HMGs) under the influence of Battery Energy Storage System (BESS) location, which has been neglected in the literature. The HMG performance is compared for one single BESS unit located either in AC or DC subgrid during various grid operational cases, considering interlinking converter (ILC) control topology that alters depending on the type of BESS. Two types of microgrid case studies with different structures have been considered, that is, a high inertia HMG and a converter-interfaced low inertia HMG. Simulation results reveal that the HMGs with both BESS locations perform robustly in handling grid disruptions. However, the BESS located in the DC sub-grid of a high inertia microgrid case presents an average of 40% higher quality of performance in key performance indicators compared to that of the AC sub-grid BESS. Conversely, the performance of the low inertia HMG with the BESS List of Symbols and Abbreviations: ω ref DG , ω Ã DG , reference and setpoint values of DG angular frequency; U ref DG ,U Ã DG , reference and setpoint values of DG voltage; U AC ,U DC , PCC voltage of ACg and DCg in the Case study I; U aci ,U dcj , bus voltages of ACg and DCg in the Case study II; ω,ω Ã ,U, U Ã , measured angular frequency and voltage (dq magnitude) of ACg and their setpoints; f AC , f ac , PCC and AC link frequency of ACg in the Case study I and II, respectively; U Ã dc , setpoint value of DCB terminal voltage; θ s , the phase angle of VSC output voltage; m DG ,n DG , active/reactive power droop coefficients of DG; m ACB ,n ACB , active/reactive power reverse droop coefficients of ACB in the Case study I; P DG , P ÃDG , active power of DG and its setpoint; Q DG ,Q Ã DG , reactive power of DG and its setpoint; P BESS , output power of battery energy storage system; P PV ,P WTG , P M , PV power, the active power of WTG, and mechanical power of induction motor in the Case study I; P L , P G , P loss , active power of AC Loads, DER generations, and line losses in the Case study I; P ACB ,P ref ACB ,P Ã ACB , output, reference, and setpoint active power of ACB in the Case study I; Q ACB ,Q ref ACB ,Q Ã ACB , output, reference, and setpoint reactive power of ACB in the Case study I; P ILC ,P Ã ILC , active power of ILC and its setpoint; Q ILC ,Q Ã ILC , reactive power of ILC and its setpoint; P ref , Q ref , active and reactive power reference of non-BESS DERs of ACg in the Case study II; I L ,I Lref , output current and its reference of non-BESS DERs of DCg in the Case study II; E 0 , R b ,Q, constant voltage, internal resistance, and charge capacity of the battery; K p , A,B, polarization constant and exponential zone voltages of the battery; U b ...

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FRT Capability Enhancement of Autonomous AC/DC Hybrid Microgrid by Coordinated MSDBR and Interlinking Converter Control Strategy

Cited by 7 publications

References 13 publications

Challenges and Solutions for LVRT Problem in DFIG Machines based Wind Turbines

Challenges and Solutions for LVRT Problem in DFIG Machines based Wind Turbines

Low-Voltage Ride-Through Techniques in DFIG-Based Wind Turbines: A Review

Performance analysis of hybrid AC / DC microgrid under influence of battery energy storage location

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