{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:XDY7YPEWYGJ65QGJ4QCWVHDQOE","short_pith_number":"pith:XDY7YPEW","canonical_record":{"source":{"id":"2606.21934","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2026-06-20T08:07:36Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"e89df630a41eb6910f3c1903c51832ebb1a121e790d7ad5d4adb2a6974f03058","abstract_canon_sha256":"ed353c45d1fd552078acd062148596d1e536a06bb17011e0e62a78e91b2e9cc3"},"schema_version":"1.0"},"canonical_sha256":"b8f1fc3c96c193eec0c9e4056a9c70710cb78db5cf9d927fe68ab377ca2899c6","source":{"kind":"arxiv","id":"2606.21934","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.21934","created_at":"2026-06-23T02:13:03Z"},{"alias_kind":"arxiv_version","alias_value":"2606.21934v1","created_at":"2026-06-23T02:13:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.21934","created_at":"2026-06-23T02:13:03Z"},{"alias_kind":"pith_short_12","alias_value":"XDY7YPEWYGJ6","created_at":"2026-06-23T02:13:03Z"},{"alias_kind":"pith_short_16","alias_value":"XDY7YPEWYGJ65QGJ","created_at":"2026-06-23T02:13:03Z"},{"alias_kind":"pith_short_8","alias_value":"XDY7YPEW","created_at":"2026-06-23T02:13:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:XDY7YPEWYGJ65QGJ4QCWVHDQOE","target":"record","payload":{"canonical_record":{"source":{"id":"2606.21934","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2026-06-20T08:07:36Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"e89df630a41eb6910f3c1903c51832ebb1a121e790d7ad5d4adb2a6974f03058","abstract_canon_sha256":"ed353c45d1fd552078acd062148596d1e536a06bb17011e0e62a78e91b2e9cc3"},"schema_version":"1.0"},"canonical_sha256":"b8f1fc3c96c193eec0c9e4056a9c70710cb78db5cf9d927fe68ab377ca2899c6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-23T02:13:03.349910Z","signature_b64":"YGGtO9zR0ewgGAIO9z4m0SUZHKW+E9+ZwEcishLZmmF9KcD+bqEzFdwdAQzas/kQPNZ5ivnGAvBJwA8030NzAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b8f1fc3c96c193eec0c9e4056a9c70710cb78db5cf9d927fe68ab377ca2899c6","last_reissued_at":"2026-06-23T02:13:03.349526Z","signature_status":"signed_v1","first_computed_at":"2026-06-23T02:13:03.349526Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.21934","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-23T02:13:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AIvdhWB1ddm93YJBFiGqAOdZBc4mRO62sy3Pe06Ss682zAZEyjXKC7g2afrtM5VrUOIrEbf/OVtXKVk5KbjJAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T19:58:13.908236Z"},"content_sha256":"ff5966221ea12d087a4562fc96966aaff5e1043b6f9ee671ef9902ff6a19b20e","schema_version":"1.0","event_id":"sha256:ff5966221ea12d087a4562fc96966aaff5e1043b6f9ee671ef9902ff6a19b20e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:XDY7YPEWYGJ65QGJ4QCWVHDQOE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"DC Link Capacitor Ripple Constraints Limit the Benefits of Utility-Owned Four-Wire Power Converters","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.SY"],"primary_cat":"eess.SY","authors_text":"Matthew Deakin, Rahmat Heidari, Shafiq Odhano, Xu Deng","submitted_at":"2026-06-20T08:07:36Z","abstract_excerpt":"Utilities are increasingly interested in power converters to increase the headroom of their assets by actively controlling power flows on their network. In this work we demonstrate that thermal limits of dc link capacitors can result in substantially diminished benefits of these converters under unbalanced operation, due to constraints on neutral current and double-line frequency power ripple. Considering nine voltage source converter topologies with varying ripple capabilities, the upper bound (in terms of additional headroom released) increases by more than 80% compared to a no-ripple case f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.21934","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.21934/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-23T02:13:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NDEKGS6xiyy4a8xWEILI2943ebnJG4bddhUvrzhS6O1ItLuJgtvig+ffJsCDx3IhBDBijprBu0m14QlJhMxvAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T19:58:13.908842Z"},"content_sha256":"86712e2b16286c48c47640d70f0b51d93b3aac0a8e306cd9e0dfb000f30ed4d4","schema_version":"1.0","event_id":"sha256:86712e2b16286c48c47640d70f0b51d93b3aac0a8e306cd9e0dfb000f30ed4d4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XDY7YPEWYGJ65QGJ4QCWVHDQOE/bundle.json","state_url":"https://pith.science/pith/XDY7YPEWYGJ65QGJ4QCWVHDQOE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XDY7YPEWYGJ65QGJ4QCWVHDQOE/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-28T19:58:13Z","links":{"resolver":"https://pith.science/pith/XDY7YPEWYGJ65QGJ4QCWVHDQOE","bundle":"https://pith.science/pith/XDY7YPEWYGJ65QGJ4QCWVHDQOE/bundle.json","state":"https://pith.science/pith/XDY7YPEWYGJ65QGJ4QCWVHDQOE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XDY7YPEWYGJ65QGJ4QCWVHDQOE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:XDY7YPEWYGJ65QGJ4QCWVHDQOE","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":"ed353c45d1fd552078acd062148596d1e536a06bb17011e0e62a78e91b2e9cc3","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2026-06-20T08:07:36Z","title_canon_sha256":"e89df630a41eb6910f3c1903c51832ebb1a121e790d7ad5d4adb2a6974f03058"},"schema_version":"1.0","source":{"id":"2606.21934","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.21934","created_at":"2026-06-23T02:13:03Z"},{"alias_kind":"arxiv_version","alias_value":"2606.21934v1","created_at":"2026-06-23T02:13:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.21934","created_at":"2026-06-23T02:13:03Z"},{"alias_kind":"pith_short_12","alias_value":"XDY7YPEWYGJ6","created_at":"2026-06-23T02:13:03Z"},{"alias_kind":"pith_short_16","alias_value":"XDY7YPEWYGJ65QGJ","created_at":"2026-06-23T02:13:03Z"},{"alias_kind":"pith_short_8","alias_value":"XDY7YPEW","created_at":"2026-06-23T02:13:03Z"}],"graph_snapshots":[{"event_id":"sha256:86712e2b16286c48c47640d70f0b51d93b3aac0a8e306cd9e0dfb000f30ed4d4","target":"graph","created_at":"2026-06-23T02:13:03Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2606.21934/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Utilities are increasingly interested in power converters to increase the headroom of their assets by actively controlling power flows on their network. In this work we demonstrate that thermal limits of dc link capacitors can result in substantially diminished benefits of these converters under unbalanced operation, due to constraints on neutral current and double-line frequency power ripple. Considering nine voltage source converter topologies with varying ripple capabilities, the upper bound (in terms of additional headroom released) increases by more than 80% compared to a no-ripple case f","authors_text":"Matthew Deakin, Rahmat Heidari, Shafiq Odhano, Xu Deng","cross_cats":["cs.SY"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2026-06-20T08:07:36Z","title":"DC Link Capacitor Ripple Constraints Limit the Benefits of Utility-Owned Four-Wire Power Converters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.21934","kind":"arxiv","version":1},"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:ff5966221ea12d087a4562fc96966aaff5e1043b6f9ee671ef9902ff6a19b20e","target":"record","created_at":"2026-06-23T02:13:03Z","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":"ed353c45d1fd552078acd062148596d1e536a06bb17011e0e62a78e91b2e9cc3","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2026-06-20T08:07:36Z","title_canon_sha256":"e89df630a41eb6910f3c1903c51832ebb1a121e790d7ad5d4adb2a6974f03058"},"schema_version":"1.0","source":{"id":"2606.21934","kind":"arxiv","version":1}},"canonical_sha256":"b8f1fc3c96c193eec0c9e4056a9c70710cb78db5cf9d927fe68ab377ca2899c6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b8f1fc3c96c193eec0c9e4056a9c70710cb78db5cf9d927fe68ab377ca2899c6","first_computed_at":"2026-06-23T02:13:03.349526Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-23T02:13:03.349526Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YGGtO9zR0ewgGAIO9z4m0SUZHKW+E9+ZwEcishLZmmF9KcD+bqEzFdwdAQzas/kQPNZ5ivnGAvBJwA8030NzAw==","signature_status":"signed_v1","signed_at":"2026-06-23T02:13:03.349910Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.21934","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ff5966221ea12d087a4562fc96966aaff5e1043b6f9ee671ef9902ff6a19b20e","sha256:86712e2b16286c48c47640d70f0b51d93b3aac0a8e306cd9e0dfb000f30ed4d4"],"state_sha256":"2d841e907fe05837bccf2ec1eecf36e6cd9d70ce5c7f807a89a8d75a4ea056ec"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r3NRw4SaeNSbt7Gkbk0aABwK3hWfpTRaTvU6bSrN5VElms5ecmPBoF/lGGAGmPfOYNjajJTt1ItbCx2C+SVPAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T19:58:13.911497Z","bundle_sha256":"756800091412d67a1affaf39f80db444fefd8cc23d12edc931b3ca906f37f3cc"}}