MY176033A - Residual voltage computation circuit, power outage determination circuit, and system-linked device - Google Patents
Residual voltage computation circuit, power outage determination circuit, and system-linked deviceInfo
- Publication number
- MY176033A MY176033A MYPI2016703833A MYPI2016703833A MY176033A MY 176033 A MY176033 A MY 176033A MY PI2016703833 A MYPI2016703833 A MY PI2016703833A MY PI2016703833 A MYPI2016703833 A MY PI2016703833A MY 176033 A MY176033 A MY 176033A
- Authority
- MY
- Malaysia
- Prior art keywords
- phase
- negative
- positive
- axis component
- component
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/16—Measuring asymmetry of polyphase networks
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
- Inverter Devices (AREA)
Abstract
RESIDUAL VOLTAGE COMPUTATION CIRCUIT, POWER OUTAGE DETERMINATION CIRCUIT, AND SYSTEM-LINKED DEVICE By and in a phase synchronization circuit (11), a positive-phase phase (?pos) and a negative-phase phase (?neg) are calculated on the basis of line voltages (Vrs and Vst) of a three-phase system. By and in DQ conversion units (12a,12b), a positive phase D-axis component (Vposd), a positive phase Q-axis component (Vposq), a negative phase D-axis component (Vnegd) and a negative phase Q-axis component (Vnegq) are calculated by performing rotation coordinate transformation of the line voltage (Vrs and Vst)by the positive-phase phase (?pos) and the negative-phase phase (?neg). By and in absolute value calculation units (13a and 13b), a positive phase component absolute value (Vpos) is calculated on the basis of the positive phase D-axis component (Vposd) and the positive phase Q-axis component (Vposq), and a negative phase component absolute value (Vneg) is calculated on the basis of the negative phase D-axis component (Vnegd) and the negative phase Q-axis component (Vnegq). By and in a differentiator (14), an asymmetrical residual voltage (Vdipa), which is a residual voltage that is not dependent on failure aspect upon occurrence of voltage drop, by calculating a difference between the positive phase component absolute value (Vpos) and the negative phase component absolute value (Vneg). With these processes, by and in a circuit interconnected with a three-phase system, the residual voltage can be estimated in any cases of the failure aspects upon occurrence of the voltage drop.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014090775A JP6269295B2 (en) | 2014-04-25 | 2014-04-25 | Residual voltage calculation circuit, power failure judgment circuit, and grid interconnection device |
Publications (1)
Publication Number | Publication Date |
---|---|
MY176033A true MY176033A (en) | 2020-07-22 |
Family
ID=54332179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MYPI2016703833A MY176033A (en) | 2014-04-25 | 2015-03-03 | Residual voltage computation circuit, power outage determination circuit, and system-linked device |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP6269295B2 (en) |
MY (1) | MY176033A (en) |
WO (1) | WO2015163008A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106329566B (en) * | 2016-08-30 | 2019-01-29 | 中国科学院电工研究所 | Inverter alternating voltage sensorless control method when network voltage asymmetry |
CN107085136A (en) * | 2017-03-15 | 2017-08-22 | 中国电力科学研究院 | A kind of three-phase alternating voltage falls the determination methods and system of state |
CN113376424B (en) * | 2021-05-20 | 2022-04-22 | 国网湖北省电力有限公司电力科学研究院 | Voltage sag detection method for cascade type electric energy quality comprehensive treatment device |
CN113364060B (en) * | 2021-06-04 | 2022-07-05 | 国网福建省电力有限公司经济技术研究院 | Reactive power control method for direct-drive fan system during asymmetric drop of power grid voltage |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5644346A (en) * | 1979-09-17 | 1981-04-23 | Tokyo Shibaura Electric Co | Failure detection relay |
JP2004156986A (en) * | 2002-11-06 | 2004-06-03 | Fuji Electric Fa Components & Systems Co Ltd | Power failure detection device |
JP4470614B2 (en) * | 2004-06-29 | 2010-06-02 | 富士電機ホールディングス株式会社 | Power failure detection device |
-
2014
- 2014-04-25 JP JP2014090775A patent/JP6269295B2/en not_active Expired - Fee Related
-
2015
- 2015-03-03 WO PCT/JP2015/056152 patent/WO2015163008A1/en active Application Filing
- 2015-03-03 MY MYPI2016703833A patent/MY176033A/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2015163008A1 (en) | 2015-10-29 |
JP2015210136A (en) | 2015-11-24 |
JP6269295B2 (en) | 2018-01-31 |
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