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pith:L5O5DI2W

pith:2026:L5O5DI2W3HXWARIIG572MA3EE3

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Revisiting the Voltage-Source Behavior: Why Impedance Magnitude of Grid-Forming Converter Rises Near Fundamental Frequency?

Changjiang Zhan, Chao Wu, Frede Blaabjerg, Jinhao Wang, Yong Wang

The impedance peak and negative-resistance region near the fundamental frequency in grid-forming converters originate from the integrative action in the active power control loop's power-to-angle mapping.

arxiv:2605.17216 v1 · 2026-05-17 · eess.SY · cs.SY

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Claims

C1strongest claim

these phenomena originate from the inherent dynamics of the active power control loop, where the mapping from power disturbance to the synchronous angle inherently involves an integrative action, intrinsically preventing a positive-resistance characteristic near the fundamental frequency

C2weakest assumption

The assumption that the integrative action in the power-to-angle mapping of the active power control loop is the dominant and inherent cause of the observed impedance peak and negative-resistance region, rather than interactions with other loops or external system dynamics. This premise enters in the abstract as the origin of the phenomena.

C3one line summary

Impedance magnitude rise and negative resistance near fundamental frequency in GFM converters originate from integrative action in active power control's power-to-angle mapping, explaining grid-code exclusions and enabling a corner-frequency-based index for voltage-source assessment.

References

27 extracted · 27 resolved · 0 Pith anchors

[1] Grid-Forming inverter- based resource research landscape: understanding the key assets for renewable-rich power systems, 2024

[2] Descriptor State Space Modeling of Power Systems, 2024

[3] An Extended Frequency - Domain Passivity Theory for MIMO Dynamics Specifications of Voltage-Source Inverters, 2025

[4] Low -Frequency Resonances in Grid - Forming Converters: Causes and Damping Control, 2024

[5] Small-Signal Stability Analysis of Inverter-Fed Power Systems Using Component Connection Method, 2018

Receipt and verification

First computed	2026-05-20T00:03:45.715885Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f5dd1a356d9ef604508377fa6036426f1f2b0f0a5e8d6c62e1d119ab8d4f4e9

Aliases

arxiv: 2605.17216 · arxiv_version: 2605.17216v1 · doi: 10.48550/arxiv.2605.17216 · pith_short_12: L5O5DI2W3HXW · pith_short_16: L5O5DI2W3HXWARII · pith_short_8: L5O5DI2W

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/L5O5DI2W3HXWARIIG572MA3EE3 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 5f5dd1a356d9ef604508377fa6036426f1f2b0f0a5e8d6c62e1d119ab8d4f4e9

Canonical record JSON

{
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      "cs.SY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SY",
    "submitted_at": "2026-05-17T01:20:55Z",
    "title_canon_sha256": "3cd03e298a8f43f4024839abf58d711b88b286a6ac9906e58cd7382781b99a56"
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  "source": {
    "id": "2605.17216",
    "kind": "arxiv",
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}