{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:27USOWPKT6PAW5O5HLGCNTYR4I","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"0036640bbe372068729750c480789f33ede39a4420d1fd656635935fde3854f9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2018-09-26T11:55:35Z","title_canon_sha256":"c088e799e367fcfe4e52c5147465577f693820d6253ebf20a10afd35bf9f4c22"},"schema_version":"1.0","source":{"id":"1809.09922","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.09922","created_at":"2026-05-17T23:43:23Z"},{"alias_kind":"arxiv_version","alias_value":"1809.09922v3","created_at":"2026-05-17T23:43:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.09922","created_at":"2026-05-17T23:43:23Z"},{"alias_kind":"pith_short_12","alias_value":"27USOWPKT6PA","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"27USOWPKT6PAW5O5","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"27USOWPK","created_at":"2026-05-18T12:31:59Z"}],"graph_snapshots":[{"event_id":"sha256:c1056422afe7a813c197ca43471091b9d4769cb9a3eccba12c73fd73385df78e","target":"graph","created_at":"2026-05-17T23:43:23Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"This paper proposes a Voltage Stability Index (VSI) suitable for unbalanced polyphase power systems. To this end, the grid is represented by a polyphase multiport network model (i.e., compound hybrid parameters), and the aggregate behavior of the devices in each node by Th\\'evenin Equivalents (TEs) and Polynomial Models (PMs), respectively. The proposed VSI is a generalization of the known L-index, which is achieved through the use of compound electrical parameters, and the incorporation of TEs and PMs into its formal definition. Notably, the proposed VSI can handle unbalanced polyphase power ","authors_text":"Andreas Martin Kettner, Mario Paolone","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2018-09-26T11:55:35Z","title":"A Generalized Index for Static Voltage Stability of Unbalanced Polyphase Power Systems including Th\\'evenin Equivalents and Polynomial Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.09922","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:5681502d3d105323822790f365027c1b9f0fbd73c7ec8f4507290350e8af5d86","target":"record","created_at":"2026-05-17T23:43:23Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"0036640bbe372068729750c480789f33ede39a4420d1fd656635935fde3854f9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2018-09-26T11:55:35Z","title_canon_sha256":"c088e799e367fcfe4e52c5147465577f693820d6253ebf20a10afd35bf9f4c22"},"schema_version":"1.0","source":{"id":"1809.09922","kind":"arxiv","version":3}},"canonical_sha256":"d7e92759ea9f9e0b75dd3acc26cf11e209b1d47758f6c2576e4a997be8c7044a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d7e92759ea9f9e0b75dd3acc26cf11e209b1d47758f6c2576e4a997be8c7044a","first_computed_at":"2026-05-17T23:43:23.631424Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:23.631424Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sgDLkLWRBYimIVmdlzzZc3dBjgOTvydzdZbCyDTZaZn+yNkKNrCP6oTESVP3w3x/XuiOUllLTPHV6TdMe42hBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:23.632056Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.09922","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5681502d3d105323822790f365027c1b9f0fbd73c7ec8f4507290350e8af5d86","sha256:c1056422afe7a813c197ca43471091b9d4769cb9a3eccba12c73fd73385df78e"],"state_sha256":"2bdf5e1bc52962637c67a6a2f731f5a2ee0ab45235318a36c2d1ab923a4ac8a4"}