US3610944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System-interconnecting arrangement
Assignee: Mitsubishi Electric Corp
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Filing: 1970-03-20
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Granted: 1971-10-05
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Expires: 1990-03-20
Abstract
Abstract Two electric power systems are interconnected through primary windings of series transformers connected in parallel with each other. A shunt transformer is across the connecting series transformers and includes three windings of which two are connected across the secondary winding of each of the series transformers with a capacitor disposed between the secondary windings of both transformers. A thyristor is connected across the tertiary winding of the shunt transformer. The thyristor is in a closed condition to perform the normal interconnected system operation and assumes an opened condition upon the occurrence of a short circuit on either power system.
Inventors
- 👤 Tsuneo Mitsui
- 👤 Jun-Ichi Baba
- 👤 Ikuo Yamada
- 👤 Hiromichi Kinoshita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:42
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/04; H02J3/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A system-interconnecting arrangement for interconnecting a pair of electric power systems comprising, a series transformer connected between two electric power systems, a shunt transformer including a primary winding, a secondary winding and a tertiary winding, said primary and secondary windings of said shunt transformer being connected in parallel circuit relationship to with the secondary winding of said series transformer, a capacitor connected to said secondary winding of said shunt transformer, and a switching device connected across said tertiary winding of said shunt transformer.
Claim 2
Independent Claim
83 words
A system-interconnecting arrangement for interconnecting a pair of electric power systems comprising, a series transformer connected between two electric power systems, a shunt transformer including a primary winding, a secondary winding and a tertiary winding, said primary and secondary windings of said shunt transformer being connected in parallel circuit relationship to with the secondary winding of said series transformer, a capacitor connected to said secondary winding of said shunt transformer, and a switching device connected across said tertiary winding of said shunt transformer.
Claim 3
Dependent Claim
29 words
A system-interconnecting arrangement as claimed in claim 1, comprising a circuit breaker connected between said pair of electric power systems and in parallel circuit relationship with said series transformer.
Claim 4
Dependent Claim
28 words
A system-interconnecting arrangement as claimed in claim 1 comprising a circuit breaker connected between said pair of electric power systems in series circuit relationship with said series transformer.
Claim 5
Dependent Claim
20 words
A system-interconnecting arrangement as claimed in claim 1 comprising a reactor connected to said primary winding of said shunt transformer.
Claim 6
Independent Claim
92 words
A system-interconnecting arrangement for interconnecting a pair of electric power systems, comprising a plurality of series transformers connected in parallel circuit relationship between two electric power systems, one shunt transformer for each series transformer including a primary winding, a secondary winding and a tertiary winding, said primary and secondary windings of said shunt transformer being connected in parallel circuit relationship with the secondary winding of said serieS transformer, a capacitor connected to said secondary winding of said shunt transformer and a switching device connected across said tertiary winding of said shunt transformer.
Claim 7
Independent Claim
92 words
A system-interconnecting arrangement for interconnecting a pair of electric power systems, comprising a plurality of series transformers connected in parallel circuit relationship between two electric power systems, one shunt transformer for each series transformer including a primary winding, a secondary winding and a tertiary winding, said primary and secondary windings of said shunt transformer being connected in parallel circuit relationship with the secondary winding of said serieS transformer, a capacitor connected to said secondary winding of said shunt transformer and a switching device connected across said tertiary winding of said shunt transformer.
Claim 8
Dependent Claim
27 words
A system-interconnecting arrangement as claimed in claim 5, comprising a circuit breaker connected between said electric power systems and in parallel circuit relationship with said series transformer.
Claim 9
Dependent Claim
20 words
A system-interconnecting arrangement as claimed in claim 5 comprising a reactor connected to said primary winding of said shunt transformer.
Claim 10
Dependent Claim
23 words
A system-interconnecting arrangement as claimed in claim 5 comprising a circuit interrupter connected in series circuit relationship to each of said series transformers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |