Grid Fault Current Injection Using Virtual Synchronous Machines Featuring Active Junction Temperature Limitation of Power Devices

Mandrile, Fabio; Stella, Fausto; Carpaneto, Enrico; Bojoi, Radu

doi:10.1109/jestpe.2022.3154488

Cited by 6 publications

(3 citation statements)

References 27 publications

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“…The resulting values are listed in Table 2. Note that I shc,i is selected higher than the nominal current I rated ,i , but lower than 1.4 I rated ,i , as expected [36]. Based on this design, the steady-state current will not exceed I shc,i , as will be seen in the following subsections.…”

Section: Laboratory Setupmentioning

confidence: 88%

“…The design of

{R}_{fixed,i}

is the key point of this technique. It should be chosen high enough so that the short circuit current (

{I}_{sch,i} &gt; {I}_{rated,i}

) is not exceeded in steady‐state under any circumstance [36]. In this case, in non‐extreme overcurrent conditions, the current will be less than

{I}_{shc,i}

[25].…”

Section: System Descriptionmentioning

confidence: 99%

“…In this case, the usual value for

UL

is 1.1. To better support the microgrid,

UL

could be fixed at 1.4 when an algorithm to active limiting the junction temperature of the power switches is included; see [36].…”

Section: Control Designmentioning

confidence: 99%

See 2 more Smart Citations

Improving voltage imbalance in inverter‐based islanded microgrids during line‐to‐line short circuits

Castilla

Miret

Vicuña

et al. 2023

IET Power Electronics

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Line‐to‐line short circuits are the transient disturbances that cause the highest currents as well as the largest voltage imbalances in inverter‐based microgrids. This paper presents a control scheme for grid‐forming inverters in islanded microgrids that limits the current to a safe value during these types of short circuits while providing a lower voltage imbalance compared to state‐of‐the‐art current limiting techniques. This control scheme is based on reducing both the amplitude of the reference voltage with the maximum amplitude of the reference current and the instantaneous reference voltage with only the inductive component of the virtual impedance. The combination of these two control actions provides low voltage imbalance, as the theoretical and experimental studies reveal. This voltage imbalance improvement is the main contribution of this paper and is maintained when the microgrid supplies linear and non‐linear loads. In the theoretical study, the paper includes control design guidelines to satisfy static and dynamic specifications. The theoretical predictions are validated by means of experimental results measured in a laboratory microgrid. A practical performance comparison of current limiting techniques based on experimental tests is also reported.

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Section: Laboratory Setupmentioning

confidence: 88%

“…The design of