Patent US4460488A successfully refreshed from Google Patents.
Patent EP0087640A2 successfully refreshed from Google Patents.
EP0087640A2
Expired / Lapsed
EP
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Control device for a converter
Assignee: Toshiba Corp
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Filing: 1983-02-10
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Granted: —
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Expires: 2003-02-10
Abstract
Abstract A control device for a converter used in a DC transmission system comprises an automatic current regulator (56A, 56B), an automatic margin-angle regulator (42A, 42B) and an automatic voltage regulator (30A, 30B). The output of the automatic voltage regulator (30A, 308) is supplied to the automatic margin-angle regulator (42A, 42B) to vary a margin-angle reference of the automatic margin-angle regulator (42A, 42B).
Inventors
- 👤 Haruhisa Inokuchi
- 👤 Takami Sakai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 15:45
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/36; H02M; H02M7/00; H02M7/66; H02M7/68; H02M7/72; H02M7/75; H02M7/757; H02M7/7575; Y; Y02; Y02E; Y02E60/00; Y02E60/60
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
159 words
A control device for a converter used in a DC transmission system, comprising an automatic voltage regulator (30A, 30B) for generating a control angle signal to maintain DC voltage constant, an automatic margin-angle regulator (42A, 42B) for generating a control angle signal for keeping the margin-angle of the converter constant, an automatic current regulator (56A, 56B) for generating a control angle signal for keeping the DC current constant, characterized in that said automatic margin-angle regulator (42A, 42B) makes the margin-angle of the converter equal to the predetermined margin-angle determined by an output signal from said automatic voltage regulator (30A, 30B) and there is provided a switch circuit (44A, 44B, 58A, 58B) for supplying an output signal from said automatic margin-angle regulator (42A, 42B) to the converter (10A, 10B) when the converter functions as an inverter and supplying an output signal from said automatic current regulator (56A, 56B) to the converter (10A, 10B) when the converter functions as a rectifier.
Claim 2
Dependent Claim
159 words
A control device for a converter used in a DC transmission system, comprising an automatic voltage regulator (30A, 30B) for generating a control angle signal to maintain DC voltage constant, an automatic margin-angle regulator (42A, 42B) for generating a control angle signal for keeping the margin-angle of the converter constant, an automatic current regulator (56A, 56B) for generating a control angle signal for keeping the DC current constant, characterized in that said automatic margin-angle regulator (42A, 42B) makes the margin-angle of the converter equal to the predetermined margin-angle determined by an output signal from said automatic voltage regulator (30A, 30B) and there is provided a switch circuit (44A, 44B, 58A, 58B) for supplying an output signal from said automatic margin-angle regulator (42A, 42B) to the converter (10A, 10B) when the converter functions as an inverter and supplying an output signal from said automatic current regulator (56A, 56B) to the converter (10A, 10B) when the converter functions as a rectifier.
Claim 3
Dependent Claim
111 words
A control device according to claim 1, characterized in that said automatic margin-angle regulator (42A, 42B) comprises a margin-angle presetter (36A, 36B), a limiter (32A, 32B) for passing those output signals from the automatic voltage regulator (30A, 30B) which are within a predetermined range of level, a summing circuit (34A, 34B) for summing the output signals from the limiter (32A, 32B) and margin-angle presetter (36A, 36B), a detector (40A, 40B) for detecting the margin-angle of the converter (10A, 10B), and a regulator (42A, 42B) for determining the control angle of the converter (10A, 10B) according to the difference between the outputs from the summing circuit (34A, 34B) and detector (40A, 40B).
Claim 4
Dependent Claim
93 words
A control device according to claim 1, characterized in that said automatic margin-angle regulator (42A, 42B) comprises a margin-angle presetter (36A, 36B), a limiter (32A, 32B) for passing those output signals from the automatic voltage regulator (30A, 30B) which are within a predetermined range of level, a summing circuit (34A, 34B) for summing the output signals from the limiter (32A, 32B) and reference margin-angle presetter (36A, 36B), and a regulator (70A, 70B) for determining the control angle of the converter (10A, 10B) according to the output signal from the summing circuit (34A, 34B).
Claim 5
Dependent Claim
132 words
A control device according to claim 1, characterized in that said switch circuit comprises a current presetter (50), a current margin presetter (52), a current detector (24A, 24B), a first summing circuit (48A) for supplying a signal obtained by subtracting the deterctor output from the current reference to said automatic current regulator (56A) when the converter functions as a rectifier, a second summing circuit (48B) for supplying a signal obtained by subtracting the detector output and the current margin from the current reference to said automatic current regulator (56B) when the converter functions as an inverter, and an low-vlaue gate (44A, 44B, 58A, 58B) connected to said automatic margin-angle regulator (42A, 42B) and said automatic current regulator (56A, 56B) at input terminals and to the converter (10A, 10B) at the output terminal.
References Cited (Backward Citations)
No citation records indexed.
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