JPS57152024A - Control system for reactive power compensating device - Google Patents
Control system for reactive power compensating deviceInfo
- Publication number
- JPS57152024A JPS57152024A JP56036656A JP3665681A JPS57152024A JP S57152024 A JPS57152024 A JP S57152024A JP 56036656 A JP56036656 A JP 56036656A JP 3665681 A JP3665681 A JP 3665681A JP S57152024 A JPS57152024 A JP S57152024A
- Authority
- JP
- Japan
- Prior art keywords
- arc furnace
- reactive power
- reactor
- signal
- trigger angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/70—Regulating power factor; Regulating reactive current or power
Abstract
PURPOSE:To achieve operation with low loss, by fixing a reactive power generated from a thyristor controlling reactor at a temporary stop of an arc furnace to as small value as possible within a permissible range of increase in a system voltage. CONSTITUTION:During the opertion of an arc furnace 1, a control circuit 5 calculates a reactive power QF generated from the arc furnace and a reactive power by a branch reactor 3 for the compensation of a reactive power Qc by a fixed capacitor 2 and converts them into a position controlling signal Ec. The signal Ec is applied to a thyristor converter 4 and a trigger angle of the converter 4 is controlled to generate the power QL required for compensation. When the arc furnace is temporarily stopped, an arc furnace stop detecting circuit 6 gives an arc furnace stop signal 15 to the circuit 5, which receives the signal and controls the trigger angle of a converter 15 to a prescribed trigger angle larger than the minimum trigger angle and at a permissible limit of the rise in the system voltage. Thus, the generated loss of the reactor 3 can be reduced without opening the power supply to the reactor 3 and the compensation operation can immediately be restarted when the arc furnace restarts the operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56036656A JPS57152024A (en) | 1981-03-16 | 1981-03-16 | Control system for reactive power compensating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56036656A JPS57152024A (en) | 1981-03-16 | 1981-03-16 | Control system for reactive power compensating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57152024A true JPS57152024A (en) | 1982-09-20 |
Family
ID=12475891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56036656A Pending JPS57152024A (en) | 1981-03-16 | 1981-03-16 | Control system for reactive power compensating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57152024A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52104741A (en) * | 1976-03-01 | 1977-09-02 | Toshiba Corp | Reactive power (compensating method) or compensation |
-
1981
- 1981-03-16 JP JP56036656A patent/JPS57152024A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52104741A (en) * | 1976-03-01 | 1977-09-02 | Toshiba Corp | Reactive power (compensating method) or compensation |
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