CN2533472Y - AC three-phase voltage monitor - Google Patents
AC three-phase voltage monitor Download PDFInfo
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- CN2533472Y CN2533472Y CN 01258697 CN01258697U CN2533472Y CN 2533472 Y CN2533472 Y CN 2533472Y CN 01258697 CN01258697 CN 01258697 CN 01258697 U CN01258697 U CN 01258697U CN 2533472 Y CN2533472 Y CN 2533472Y
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- 238000012544 monitoring process Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000004069 differentiation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000002547 anomalous effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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- 239000004575 stone Substances 0.000 description 1
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Abstract
The utility model discloses a communicative three-phase voltage monitor which adopts two channels to monitor. One channel is to measure out the virtual value of each phase, then to add up the virtual value of the three phase, and the sum represents the highness of the present voltage, thereby judging out whether under voltage or over voltage. The other channel is to add up the virtual value of the three phase first, then measure the virtual value; when the three-phase voltage is balanced, the sum is zero; therefore, when the voltage is not zero (or lower than a certain threshold value) in the measurement in the present channel, the voltage can be judged as default phase or not balanced. The monitoring style of the utility model has the advantages of correct monitoring, rapid responding speed, and high stability.
Description
Technical field:
The utility model relates to a kind of interchange three-phase voltage monitor.
Background technology:
Under many circumstances, the ANOMALOUS VARIATIONS of alternating current three-phase voltage can be drawn the work of disturbing consumer, even causes damage.At present, more existing three-phase voltage supervising devices, but the contents of a project of these supervising device monitoring are limited, for example have only overvoltage, undervoltage warning, and do not have phase shortage and uneven the warning, otherwise perhaps.
Summary of the invention:
The purpose of this utility model is exactly to provide a kind of interchange three-phase voltage monitor in order to overcome the above problems, and can monitor under-voltage, overvoltage, phase shortage and three-phase imbalance simultaneously, and send alarm.
The utility model realizes that the scheme of above-mentioned purpose is: a kind of interchange three-phase voltage monitor, comprise voltage sample circuit, vector addition device, effective value transducer, overvoltage arbiter, under-voltage arbiter, uneven arbiter, phase shortage arbiter, alarm output driving circuit, it is characterized in that: the voltage sample circuit output terminal links to each other with the vector addition device on the one hand, the output terminal of vector addition device links to each other with the effective value transducer, and the output terminal of effective value transducer links to each other with the phase shortage arbiter with uneven arbiter; The voltage sample circuit output terminal also links to each other with three effective value transducers on the other hand, and the output terminal of three effective value transducers links to each other with a totalizer, and the output terminal of totalizer links to each other with under-voltage arbiter with the overvoltage arbiter; Each arbiter output terminal links to each other with the alarm output unit.
Adopt the beneficial effect of above scheme: utilize micro mutual inductor that three-phase voltage is carried out accurate isolated variable respectively, guarantee measuring accuracy to have guaranteed safety on the other hand on the one hand; Three-phase voltage one tunnel after the conversion send the vector addition device to do the vector addition computing, with the effective value transducer effective value conversion is carried out in vector addition device output again, and then delivers to uneven arbiter and the phase shortage arbiter carries out imbalance and phase shortage differentiation; Another road is sent effective value conversion and totalizer that three-phase voltage is respectively carried out earlier effective value to change addition again and ask average, deliver to overvoltage arbiter and under-voltage arbiter then and carry out overvoltage differentiation and under-voltage differentiation, this monitor principal feature is line voltage is realized isolating and accurate conversion, simultaneously by guaranteeing that volume in light weight is little; Each transform part of this monitor all adopts the high precision linear transformation, thereby has guaranteed control accuracy and stable.
In fact adopted the two-way monitoring in the such scheme, the one tunnel is the effective value of measuring every phase earlier, again with the addition of three-phase effective value, itself and just represented the height of current voltage, thereby can judge whether under-voltage or overvoltage; Another road then is earlier with the three-phase voltage addition, and then surveys its effective value because when the three-phase voltage balance, its addition and should be zero, therefore need only and in this drive test amount, measure voltage non-vanishing (or being lower than certain threshold value), then can be judged to phase shortage or imbalance.This monitoring mode is accurate, the response time is fast, and stability is high.
Description of drawings:
Fig. 1 a, 1b, 1c are that phase shortage detects principle schematic.
Fig. 2 a, 2b, 2c, 2d are the uneven synoptic diagram that detects.
Fig. 3 is that the utility model exchanges three-phase voltage monitor block scheme.
Fig. 4 is the physical circuit synoptic diagram of an embodiment.
Embodiment:
Also in conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.
This reality novel based on principle shown in Fig. 1 a, 1b, 1c and Fig. 2 a, 2b, 2c, 2d.Its circuit block diagram as shown in Figure 3, a specific embodiment figure is as shown in Figure 4.
As Fig. 3,4, described interchange three-phase voltage monitor comprises accurate voltage sample circuit (1) (also can be described as the accurate isolated converter of line voltage), vector addition device (2), accurate effective value transducer (3), phase shortage arbiter (6), uneven arbiter (5), accurate effective value conversion (31,32,33) and totalizer (4), overvoltage arbiter (7), under-voltage arbiter (8), alarm output driving circuit (9), display unit (10) and accurate reference source (11).
Accurate voltage sample circuit (1) uses accurate miniature mutual inductor and operational amplifier that line voltage is carried out accurate conversion (see figure 4), guaranteed high precision on the one hand, make again on the other hand and detect and alarm output circuit and grid height isolation, guaranteed safety, and the shortcoming of having avoided the big inconvenience of the volume and weight that brings with transformer to install.
The rectification circuit (Fig. 4) that described effective value transducer (3,31,32,33) is made up of operational amplifier and diode has been eliminated the error that the dead band voltage of diode brings, the measuring accuracy that has guaranteed line voltage.
Accurate vector addition device (2) is used for three-phase voltage is carried out vector calculus, is output as zero during according to three-phase voltage vector addition balance, and the result is non-vanishing when uneven judges whether balance of voltage.The output size of vector addition device (2) is relevant with the uneven degree of line voltage.
The alarm threshold of described overvoltage arbiter (7), under-voltage arbiter (8), uneven arbiter (5), phase shortage arbiter (6) is provided by accurate high stable voltage-reference, thereby guaranteed the precise and stable of alarm point, alarm threshold is adjustable and displayable on the other hand, can adjust alarm threshold at any time at different use objects, thereby make this detecting device have versatility.
The utility model has also adopted display technique, line voltage or each alarm threshold are delivered to display unit (10) by the high precision A/D converter to be shown, utilize adjusting of display technique and alarm threshold, thereby can adjust alarm threshold easily according to concrete use object, thereby make this monitor have versatility.
Its principle of work is as follows:
1, accurate voltage sample circuit (1) (the accurate isolated converter of line voltage) is with A, B, C
Three-phase alternating voltage respectively through mutual inductor isolate precision be transformed into light current three-phase signal UA,
UB, UC, and keep phase place consistent with line voltage.
2, phase shortage and the uneven principle that detects
UA, UB, UC deliver to accurate effective value transducer (3) and carry out the effective value conversion after vector addition device (2) carries out the vector addition computing, send phase shortage and uneven arbiter to carry out phase shortage and uneven differentiation then.When three-phase voltage not when phase shortage and balance, three-phase voltage vector and equal zero (as Fig. 1 a, 2a), when imbalance of three-phase voltage, its vector with effective value must be greater than zero (as Fig. 2 b---when two phase voltages are undesired, 2c---when two-phase is unusual, 2d---mutually or two-phase when unusual).Like this by detect the three-phase voltage vector and effective value just can judge whether to deposit imbalance.According to concrete system suitable alarm threshold is set in the requirement of grid balance degree, as 44V (nominal voltage 20%).When vector and effective value to acquire a certain degree be to think phase shortage (as Fig. 1 b, 1c), such as 176V (nominal value 220V 80%).
3, overvoltage and under-voltage detection
Overvoltage and under-voltage detection principle are that three-phase voltage is asked effective value respectively, then each effective value phase adduction are asked on average, again mean value are differentiated whether have overvoltage or under-voltage fault with overvoltage and undervoltage alarm threshold ratio respectively.
The utlity model has following characteristics: the first, can realize the average of Measurement accuracy three-phase voltage Value has the functions such as disconnected phase, imbalance, overvoltage, undervoltage alarm, control; The second, has announcement The set-up function of alert threshold voltage can be set your needed announcement according to your concrete condition of system Alert threshold voltage; Three, adopt LED demonstration and duty indication, simple and clear. Four, It is fast to have a response time, and stable high can be widely used in electric power, telecommunications, railway, stone The departments such as oil, coal, metallurgy, municipal administration.
Claims (5)
1. one kind exchanges the three-phase voltage monitor, comprise voltage sample circuit (1), vector addition device (2), effective value transducer (3,31,32,33), overvoltage arbiter (7), under-voltage arbiter (8), uneven arbiter (5), phase shortage arbiter (6), alarm output driving circuit (9), it is characterized in that: voltage sample circuit (1) output terminal links to each other with vector addition device (2) on the one hand, the output terminal of vector addition device (2) links to each other with effective value transducer (3), and the output terminal of effective value transducer (3) links to each other with phase shortage arbiter (6) with uneven arbiter (5); Voltage sample circuit (1) output terminal also links to each other with three effective value transducers (31,32,33) on the other hand, the output terminal of three effective value transducers (31,32,33) links to each other with a totalizer (4), and the output terminal of totalizer (4) links to each other with under-voltage arbiter (8) with overvoltage arbiter (7); Each arbiter output terminal links to each other with alarm output unit (9).
2. interchange three-phase voltage monitor as claimed in claim 1 is characterized in that: voltage sample circuit (1) comprises micro mutual inductor and operational amplifier.
3. interchange three-phase voltage monitor as claimed in claim 1 or 2 is characterized in that: the rectification circuit that described effective value transducer (3,31,32,33) is made up of operational amplifier and diode.
4. interchange three-phase voltage monitor as claimed in claim 1 or 2 is characterized in that: the alarm threshold of described overvoltage arbiter (7), under-voltage arbiter (8), uneven arbiter (5), phase shortage arbiter (6) is provided by high stable voltage-reference (11).
5. interchange three-phase voltage monitor as claimed in claim 1 or 2 is characterized in that: line voltage or each alarm threshold are also delivered to display unit (10) by high progress analog/digital converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01258697 CN2533472Y (en) | 2001-12-14 | 2001-12-14 | AC three-phase voltage monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01258697 CN2533472Y (en) | 2001-12-14 | 2001-12-14 | AC three-phase voltage monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2533472Y true CN2533472Y (en) | 2003-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01258697 Expired - Lifetime CN2533472Y (en) | 2001-12-14 | 2001-12-14 | AC three-phase voltage monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2533472Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100347926C (en) * | 2003-08-18 | 2007-11-07 | 陈旭峰 | Three-phase distributing balancing testing adjusting method for light system and light system distributing managing apparatus |
| CN101853554A (en) * | 2010-04-29 | 2010-10-06 | 成都军通通信股份有限公司 | Fireproofing pre-warning monitoring method for unmanned base station and system thereof |
| CN101187678B (en) * | 2007-11-30 | 2010-12-01 | 艾默生网络能源有限公司 | Frequency converter output voltage detection circuit |
| CN101685120B (en) * | 2008-04-18 | 2011-11-02 | 段志刚 | Method and circuit for detecting three-phase three-wire input default phase or imbalance |
| CN102288809A (en) * | 2011-07-04 | 2011-12-21 | 隆鑫通用动力股份有限公司 | Voltmeter for measuring generating set |
| CN103439587A (en) * | 2013-09-10 | 2013-12-11 | 深圳市禾望电气有限公司 | Three-phase alternating current detecting method |
| CN103728485A (en) * | 2013-09-11 | 2014-04-16 | 上海交通大学 | Synchronous voltage detection device with protection function |
| CN105785205A (en) * | 2016-05-16 | 2016-07-20 | 上海欧忆智能网络有限公司 | Three-phase unbalanced load on-line monitoring system and device |
| CN107355964A (en) * | 2017-07-26 | 2017-11-17 | 珠海格力电器股份有限公司 | Air-conditioner set and its brownout guard method and device |
| CN110687366A (en) * | 2018-07-06 | 2020-01-14 | 施耐德电气美国股份有限公司 | System and method for managing voltage time alarms in an electrical system |
| EP3968481A1 (en) * | 2020-09-11 | 2022-03-16 | Schneider Electric USA, Inc. | Systems and methods for managing voltage event alarms in an electrical system |
| US11282369B2 (en) | 2018-07-06 | 2022-03-22 | Schneider Electric USA, Inc. | Systems and methods for managing voltage event alarms in an electrical system |
-
2001
- 2001-12-14 CN CN 01258697 patent/CN2533472Y/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100347926C (en) * | 2003-08-18 | 2007-11-07 | 陈旭峰 | Three-phase distributing balancing testing adjusting method for light system and light system distributing managing apparatus |
| CN101187678B (en) * | 2007-11-30 | 2010-12-01 | 艾默生网络能源有限公司 | Frequency converter output voltage detection circuit |
| CN101685120B (en) * | 2008-04-18 | 2011-11-02 | 段志刚 | Method and circuit for detecting three-phase three-wire input default phase or imbalance |
| CN101853554A (en) * | 2010-04-29 | 2010-10-06 | 成都军通通信股份有限公司 | Fireproofing pre-warning monitoring method for unmanned base station and system thereof |
| CN101853554B (en) * | 2010-04-29 | 2012-09-12 | 卢代高 | Fireproofing pre-warning monitoring method for unmanned base station and system thereof |
| CN102288809A (en) * | 2011-07-04 | 2011-12-21 | 隆鑫通用动力股份有限公司 | Voltmeter for measuring generating set |
| CN103439587B (en) * | 2013-09-10 | 2016-03-02 | 深圳市禾望电气股份有限公司 | The detection method of three-phase alternating current |
| CN103439587A (en) * | 2013-09-10 | 2013-12-11 | 深圳市禾望电气有限公司 | Three-phase alternating current detecting method |
| CN103728485A (en) * | 2013-09-11 | 2014-04-16 | 上海交通大学 | Synchronous voltage detection device with protection function |
| CN103728485B (en) * | 2013-09-11 | 2017-01-18 | 上海交通大学 | Synchronous voltage detection device with protection function |
| CN105785205A (en) * | 2016-05-16 | 2016-07-20 | 上海欧忆智能网络有限公司 | Three-phase unbalanced load on-line monitoring system and device |
| CN107355964A (en) * | 2017-07-26 | 2017-11-17 | 珠海格力电器股份有限公司 | Air-conditioner set and its brownout guard method and device |
| CN107355964B (en) * | 2017-07-26 | 2019-08-20 | 珠海格力电器股份有限公司 | Air-conditioner set and its brownout guard method and device |
| CN110687366A (en) * | 2018-07-06 | 2020-01-14 | 施耐德电气美国股份有限公司 | System and method for managing voltage time alarms in an electrical system |
| US11282369B2 (en) | 2018-07-06 | 2022-03-22 | Schneider Electric USA, Inc. | Systems and methods for managing voltage event alarms in an electrical system |
| CN110687366B (en) * | 2018-07-06 | 2022-06-14 | 施耐德电气美国股份有限公司 | System and method for managing voltage event alerts in an electrical system |
| EP3968481A1 (en) * | 2020-09-11 | 2022-03-16 | Schneider Electric USA, Inc. | Systems and methods for managing voltage event alarms in an electrical system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: NO. 1, KEJIGONGYEYUANKEFA ROAD, NANSHAN DISTRICT, Free format text: FORMER NAME OR ADDRESS: HOUSE 1, HUADIAN FACTORY SUITE, BANXUEGANGGONGYE DISTRICT, LONGGANG DISTRICT, SHENZHEN CITY, GUANGDONG PROVINCE, 518129, HOUSE 3 |
|
| CP03 | Change of name, title or address |
Patentee address after: 518057 No. 1, FA Lu, Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Patentee address before: 518129, Shenzhen, Guangdong province Longgang District snow Gang Industrial Zone Huadian building on the first floor, third floor |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20111214 Granted publication date: 20030129 |