JPS5763459A - Reactive power meter - Google Patents
Reactive power meterInfo
- Publication number
- JPS5763459A JPS5763459A JP55138131A JP13813180A JPS5763459A JP S5763459 A JPS5763459 A JP S5763459A JP 55138131 A JP55138131 A JP 55138131A JP 13813180 A JP13813180 A JP 13813180A JP S5763459 A JPS5763459 A JP S5763459A
- Authority
- JP
- Japan
- Prior art keywords
- reactive power
- output
- voltmeter
- amount
- given
- 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
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
- G01R21/1331—Measuring real or reactive component, measuring apparent energy
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Abstract
PURPOSE:To provide a highly durable and accurate reactive power meter which is designed to meter the amount of reactive power by means of a purely digital metering system. CONSTITUTION:The voltage and current of a power system to be measured are detected by a voltmeter 1 and an ammeter 2 respectively and given to A-D converters 3, 4 and also the output of the voltmeter 1 is given to a phase synchronizing pulse generator 5. Upon receipt of each pulse from the pulse generator 5, A-D converters 3, 4 convert input signals into sample values, and the output of a shift register 6 to which the output of the A-D converter 3 is given becomes a sample value of which phase is delayed by 90 deg. from that of the voltage of the voltmeter 1. The output of the shift register 6 is multiplied by the output of the A-D converter 4 by a multiplier 7 and the result is integrated by an adder 8 and the amount of reactive power is displayed on a digital display unit 9. By this method, the amount of reactive power can be obtained at a high accuracy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55138131A JPS5763459A (en) | 1980-10-02 | 1980-10-02 | Reactive power meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55138131A JPS5763459A (en) | 1980-10-02 | 1980-10-02 | Reactive power meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5763459A true JPS5763459A (en) | 1982-04-16 |
Family
ID=15214702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55138131A Pending JPS5763459A (en) | 1980-10-02 | 1980-10-02 | Reactive power meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5763459A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57148266A (en) * | 1981-03-11 | 1982-09-13 | Toshiba Corp | Wattmeter |
| JPS6078357A (en) * | 1983-10-05 | 1985-05-04 | Tokyo Electric Power Co Inc:The | Watthour meter |
| EP0391577A2 (en) * | 1989-04-07 | 1990-10-10 | THE GENERAL ELECTRIC COMPANY, p.l.c. | Sampling circuits |
-
1980
- 1980-10-02 JP JP55138131A patent/JPS5763459A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57148266A (en) * | 1981-03-11 | 1982-09-13 | Toshiba Corp | Wattmeter |
| JPS6322265B2 (en) * | 1981-03-11 | 1988-05-11 | Tokyo Shibaura Electric Co | |
| JPS6078357A (en) * | 1983-10-05 | 1985-05-04 | Tokyo Electric Power Co Inc:The | Watthour meter |
| EP0391577A2 (en) * | 1989-04-07 | 1990-10-10 | THE GENERAL ELECTRIC COMPANY, p.l.c. | Sampling circuits |
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