CN107732863A - Three-phase unbalanced current measurement and control device for capacitor tower - Google Patents
Three-phase unbalanced current measurement and control device for capacitor tower Download PDFInfo
- Publication number
- CN107732863A CN107732863A CN201711026891.8A CN201711026891A CN107732863A CN 107732863 A CN107732863 A CN 107732863A CN 201711026891 A CN201711026891 A CN 201711026891A CN 107732863 A CN107732863 A CN 107732863A
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- CN
- China
- Prior art keywords
- current
- value
- capacitor tower
- alarm
- actual value
- 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
- 239000003990 capacitor Substances 0.000 title claims abstract description 38
- 238000005259 measurement Methods 0.000 title abstract 4
- 239000000835 fiber Substances 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000005070 sampling Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
-
- 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
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
Abstract
The invention discloses a three-phase unbalanced current measurement and control device of a capacitance tower, which comprises an alternating current transformer sleeved on a high-voltage main loop of the capacitance tower, the alternating current transformer is connected with a current transmitter, a current digital signal converter and a current measurement and control controller in sequence, the current measurement and control controller is connected with a current engineering quantity converter for converting a current digital signal into a current actual value, an alarm current comparator for comparing the current actual value with an alarm current value, an audible and visual alarm for alarming when the current actual value exceeds the alarm current value, a trip current comparator for comparing the current actual value with a trip current value, and a trip switch for disconnecting a capacitor tower input circuit when the current actual value exceeds the trip current value, the device is used for measuring and controlling three-phase unbalanced current output by the whole capacitor tower, and realizing alarm prompt of the capacitor tower and protection of an input circuit of the capacitor tower by tripping.
Description
[technical field]
The present invention relates to a kind of capacitor tower three phase unbalance current measure and control device.
[background technology]
When capacitor tower causes the three-phase current unbalance of output because of partial destruction or wiring error, experiment production is easily damaged
Product or testing equipment, in order to avoid the further destructive test product of the three-phase current unbalance of output or testing equipment, therefore need
Observing and controlling is detected to capacitor tower three phase unbalance current.
[content of the invention]
Instant invention overcomes the deficiency of above-mentioned technology, there is provided a kind of capacitor tower three phase unbalance current measure and control device, uses
In the three phase unbalance current of the whole capacitor tower output of observing and controlling, realize that the alarm of capacitor tower and tripping operation shut-off capacitor tower are defeated
Enter the protection of circuit.
To achieve the above object, present invention employs following technical proposal：
A kind of capacitor tower three phase unbalance current measure and control device, includes the exchange being sheathed in capacitor tower high pressure major loop
Current transformer 1, the AC current transformer 1 have been sequentially connected with straight by linear scale output for induced-current to be converted into
Flow the current transducer 2 of electric current, the current digital signal converter 3 for DC current to be converted into current digital signal and
Electric current observing and controlling controller 4, the electric current observing and controlling controller 4 are connected with for current digital signal to be converted into current actual value
Electric current engineering energy converter 5, the alarm current comparator 6 for contrasting current actual value and alarm current value, in electric current
Actual value exceedes the audible-visual annunciator 7 of alarm current value alarm, for contrasting current actual value and trip current value contrast
Tripping current comparator 8, the trip switch for disconnecting capacitor tower input circuit when current actual value exceedes trip current value
9。
The electric current observing and controlling controller 4 be connected with for set alarm current value, trip current value input keyboard 10.
The electric current observing and controlling controller 4 connects display 11.
The electric current observing and controlling controller 4 is connected to the machinery that control trip switch 9 manually disconnects capacitor tower input circuit
Switch 12.
The current digital signal converter 3 is connected with electric current observing and controlling controller 4 by fiber optic cables.
The beneficial effects of the invention are as follows：
The three phase unbalance current of the output of the whole capacitor tower of observing and controlling of the present invention, when three phase unbalance current exceedes alarm electricity
Alarmed during stream, and tripping operation shut-off capacitor tower input circuit is realized when three phase unbalance current exceedes tripping current, realized
The protection of the trip protection and testing equipment of capacitor tower.
[brief description of the drawings]
Fig. 1 is schematic structural view of the invention.
[embodiment]
It is described in further detail below in conjunction with the accompanying drawings with embodiments of the present invention：
As shown in figure 1, a kind of capacitor tower three phase unbalance current measure and control device, includes and is sheathed on capacitor tower high pressure master time
AC current transformer 1 on road, the AC current transformer 1 have been sequentially connected with for induced-current to be converted into by linear
Ratio exports current transducer 2, the current digital signal for DC current to be converted into current digital signal of DC current
Converter 3 and electric current observing and controlling controller 4, the electric current observing and controlling controller 4 are connected with for current digital signal to be converted into
The electric current engineering energy converter 5 of current actual value, the alarm current comparator for contrasting current actual value and alarm current value
6th, for exceeding the audible-visual annunciator 7 of alarm current value alarm in current actual value, for contrasting current actual value and tripping operation
It is the tripping current comparator 8 of current value contrast, electric for disconnecting capacitor tower input when current actual value exceedes trip current value
The trip switch 9 on road.
Wherein, the electric current observing and controlling controller 4 be connected with for set alarm current value, trip current value input keyboard
10。
Operation principle is as follows：
The parameters such as the alarm current value of three phase unbalance current, trip current value, capacitor tower are set by inputting keyboard 10
Energization work, the AC current transformer 1 being sheathed in capacitor tower high pressure major loop sense major loop primary current no-load voltage ratio 3000/
5A signals, electric current spot sampling is realized, while induced-current presses linear scale output DC current conversion through current transducer 2 again
It is into 4~20MA DC current signals, then by the current digital signal converter 3 in PLC spot sampling modules that 4~20MA is straight
Stream current signal is converted into current digital signal, and is transferred in the electric current observing and controlling controller 4 of Control Room, and now quantities is changed
The current digital signal of spot sampling is converted into current actual value by device 5, while alarm current comparator 6 compares alarm current and set
Definite value tripping current setting value and current actual value compared with current actual value, tripping current comparator 8, when current actual value surpasses
When crossing alarm current setting value, electric current observing and controlling controller 4 controls audible-visual annunciator 7 to carry out sound and light alarm prompting, when electric current is actual
When value exceedes tripping current setting value, electric current observing and controlling controller 4 controls the system of trip switch 9 and disconnects capacitor tower input circuit, makes electric capacity
Tower powers off.
Wherein, the electric current observing and controlling controller 4 connects display 11, and display 11 shows current actual value, the electric current
Observing and controlling controller 4 is connected to the mechanical switch 12 that control trip switch 9 manually disconnects capacitor tower input circuit, does not know
When situation or emergency, trip switch 9 can be triggered by mechanical switch 12 and turn off capacitor tower input circuit, capacitor tower is broken
Electricity.
The current digital signal converter 3 is connected with electric current observing and controlling controller 4 by fiber optic cables, improves capacitor tower
The accuracy and transmission speed of electric current spot sampling, so as to improve the judgement of measure and control device and reaction speed.
Claims (5)
- A kind of 1. capacitor tower three phase unbalance current measure and control device, it is characterised in that：Include and be sheathed on capacitor tower high pressure master time AC current transformer (1) on road, the AC current transformer (1) be sequentially connected with for by induced-current be converted into by Linear scale exports current transducer (2), the electric current number for DC current to be converted into current digital signal of DC current Word signal adapter (3) and electric current observing and controlling controller (4), the electric current observing and controlling controller (4), which is connected with, to be used for electric current number Word signal is converted into the electric current engineering energy converter (5) of current actual value, for contrasting current actual value and alarm current value Alarm current comparator (6), for current actual value exceed alarm current value alarm audible-visual annunciator (7), for pair Than current actual value and the tripping current comparator (8) of trip current value contrast, for exceeding tripping current in current actual value The trip switch (9) of capacitor tower input circuit is disconnected during value.
- A kind of 2. capacitor tower three phase unbalance current supervising device according to claim 1, it is characterised in that：The electric current Observing and controlling controller (4) be connected with for set alarm current value, trip current value input keyboard (10).
- A kind of 3. capacitor tower three phase unbalance current supervising device according to claim 1, it is characterised in that：The electric current Observing and controlling controller (4) connection display (11).
- A kind of 4. capacitor tower three phase unbalance current supervising device according to claim 1, it is characterised in that：The electric current Observing and controlling controller (4) is connected to the mechanical switch (12) that control trip switch (9) manually disconnects capacitor tower input circuit.
- A kind of 5. capacitor tower three phase unbalance current supervising device according to claim 1, it is characterised in that：The electric current Digital signal converter (3) is connected with electric current observing and controlling controller (4) by fiber optic cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711026891.8A CN107732863A (en) | 2017-10-27 | 2017-10-27 | Three-phase unbalanced current measurement and control device for capacitor tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711026891.8A CN107732863A (en) | 2017-10-27 | 2017-10-27 | Three-phase unbalanced current measurement and control device for capacitor tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107732863A true CN107732863A (en) | 2018-02-23 |
Family
ID=61202746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711026891.8A Pending CN107732863A (en) | 2017-10-27 | 2017-10-27 | Three-phase unbalanced current measurement and control device for capacitor tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107732863A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100849464B1 (en) * | 2008-02-22 | 2008-07-31 | (주) 청송설계이앤씨 | A protection relay for preventing over-current caused by harmonic wave |
| KR101120055B1 (en) * | 2010-09-14 | 2012-03-22 | 삼화콘덴서공업주식회사 | Smart capacitor monitoring system |
| CN102938556A (en) * | 2012-10-24 | 2013-02-20 | 上海市电力公司 | Protecting, measuring and controlling integrated device with unbalanced current protection function for capacitor |
| CN207353815U (en) * | 2017-10-27 | 2018-05-11 | 中山市华源电气设备有限公司 | Three-phase unbalanced current measurement and control device for capacitor tower |
-
2017
- 2017-10-27 CN CN201711026891.8A patent/CN107732863A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100849464B1 (en) * | 2008-02-22 | 2008-07-31 | (주) 청송설계이앤씨 | A protection relay for preventing over-current caused by harmonic wave |
| KR101120055B1 (en) * | 2010-09-14 | 2012-03-22 | 삼화콘덴서공업주식회사 | Smart capacitor monitoring system |
| CN102938556A (en) * | 2012-10-24 | 2013-02-20 | 上海市电力公司 | Protecting, measuring and controlling integrated device with unbalanced current protection function for capacitor |
| CN207353815U (en) * | 2017-10-27 | 2018-05-11 | 中山市华源电气设备有限公司 | Three-phase unbalanced current measurement and control device for capacitor tower |
Non-Patent Citations (1)
| Title |
|---|
| 盛小伟;黄梅;阎波;: "并联电容器不平衡电流保护的改进方法研究", 继电器, no. 21, pages 47 - 51 * |
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