CN103051199A - High-voltage frequency converter with over-voltage protection function and over-voltage protection method of frequency converter - Google Patents
High-voltage frequency converter with over-voltage protection function and over-voltage protection method of frequency converter Download PDFInfo
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- CN103051199A CN103051199A CN2013100204803A CN201310020480A CN103051199A CN 103051199 A CN103051199 A CN 103051199A CN 2013100204803 A CN2013100204803 A CN 2013100204803A CN 201310020480 A CN201310020480 A CN 201310020480A CN 103051199 A CN103051199 A CN 103051199A
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Abstract
The invention discloses a high-voltage frequency converter with an over-voltage protection function, and an over-voltage protection method of the frequency converter. The high-voltage frequency converter comprises an incoming line voltage signal acquisition module, a power unit voltage signal acquisition module, an analog/digital conversion module, a signal comparison module and a master control module, wherein the analog/digital conversion module receives a voltage signal and converts the voltage signal to a digital signal for output; the signal comparison module receives the digital signal, compares the digital signal with a reference voltage signal, and outputs an over-voltage signal; and the master control module receives the over-voltage signal, and controls power frequency output of the high-voltage frequency converter. According to the invention, the incoming line voltage signal acquisition module and the power unit voltage signal acquisition module can automatically detect an over-voltage fault of the frequency converter, and when the over-voltage fault occurs, the master control module switches the output of the high-voltage frequency converter to power frequency output, and an alarm signal is emitted simultaneously, so that the frequency converter and external devices are automatically protected, and production accidents are avoided.
Description
Technical field
The present invention relates to a kind of high voltage converter, be specifically related to a kind of high voltage converter and over-voltage protection method thereof with over-voltage protection function.
Background technology
Realize that by the mode that changes ac frequency the technology of alternating current control just is converter technique, its core is frequency converter, it realizes the automatic adjusting of motor operation speed by the conversion to frequency of supply, the fixedly mains frequency of 50Hz is changed into the frequency of variation.Simultaneously, also make supply voltage adjust to certain accommodation.
High voltage converter can realize that because it has stepless time adjustment, change conventional motors are intelligent electric machine, significant energy-saving benefit, starting current can be controlled at rated current with interior, non-impact current, impact little to electrical network, reduce the advantages such as mechanical wear, saving maintenance cost, be widely used in the industries such as metallurgy, petrochemical industry, electric power, mining, urban construction and transportation industries.
High voltage converter comprises transformer case, power cabinet and the control cubicle of successively adjacent setting, and described transformer case is mainly high pressure isolation phase shifting transformer, perfect grid side voltage, the current harmonics eliminated; Power cabinet is the core of transducer power main circuit, is comprised of a plurality of identical power cells, forms the three-phase voltage that outputs to motor after the output voltage overlapped in series of each power cell; Control cubicle is the core of whole high-voltage variable-frequency and variable-speed system, it is according to operation and the setting of user at Local or Remote, and voltage, current analog amount and each switching value in the acquisition system, after carrying out logical process and calculating, determine and control the action of each power cell, further drive motors satisfies the output requirement.
In the high voltage converter running, often can be because deceleration time is too short, input supply voltage is unusual and have the reason such as energy feedback load frequency converter input overvoltage fault to occur.When the overvoltage fault appears in high voltage converter, if can not find the very first time and process, will damage frequency converter and external equipment, the production development accident.For protection high voltage converter and external equipment, avoid the generation of production accident, a kind of high voltage converter with over-voltage protection function need be provided.
Summary of the invention
The object of the invention provides a kind of high voltage converter with over-voltage protection function, automatically detects frequency converter overvoltage fault, makes the output of frequency converter power frequency, sends alarm signal simultaneously, automatically protects frequency converter and external equipment, avoids the generation of production accident.
For achieving the above object, the technical solution used in the present invention is: a kind of high voltage converter with over-voltage protection function, comprise power cabinet, and be provided with a plurality of power cells in the described power cabinet, also comprise:
Be located at the electric power incoming line place of described high voltage converter, gather and export the primary voltage signal acquisition module of the input voltage signal of described high voltage converter;
Be located at one of them power cell place of described high voltage converter, gather and export the power cell voltage signal acquisition module of the output voltage signal of described power cell;
Receive the input voltage signal of described high voltage converter, the output voltage signal of described power cell, and convert the output voltage signal of the input voltage signal of described high voltage converter and described power cell to the mould of digital signal output/number conversion module;
Receive described digital signal, and with this digital signal and reference voltage signal compare, the signal fusing module of output over-voltage signal;
Receive the main control module of described overvoltage signal, the described high voltage converter power frequency output of control;
Described primary voltage signal acquisition module be connected power cell voltage signal acquisition module and be connected with mould/number conversion module respectively, described mould/number conversion module, signal fusing module and main control module are electrically connected successively.
In the technique scheme, described primary voltage signal acquisition module is PT checkout gear or voltage Hall element;
Described power cell voltage signal acquisition module is PT checkout gear or voltage Hall element.
In the technique scheme, the main control module of this high voltage converter is located in the control cubicle, which is provided with LCDs, and the function code of described overvoltage signal and content are shown on this LCDs.
In the technique scheme, this high voltage converter also comprises the warning device of the alarm signal of sending with main control module electrical connection, the described main control module of reception.
The over-voltage protection method of the above-mentioned high voltage converter with over-voltage protection function comprises the steps:
(1) utilize the primary voltage signal acquisition module that the input voltage of high voltage converter is carried out voltage signal sampling;
(2) utilize power cell voltage signal acquisition module that the output voltage of one of them power cell of high voltage converter is carried out voltage signal sampling;
(3) utilize mould/number conversion module that the input voltage signal of the described high voltage converter that collects in step (1) and (2) and the output voltage signal of described power cell are carried out mould/number conversion;
(4) utilize the signal fusing module that the digital signal and the reference voltage signal that obtain in the step (3) are compared, when described digital signal output over-voltage signal during greater than reference voltage signal;
(5) overvoltage signal of the main control module receiving step (4) of high voltage converter switches high voltage converter to power frequency and exports;
(6) alarm module receives the alarm signal that main control module sends, caution staff high voltage converter generation overvoltage fault.
Because technique scheme is used, the advantage that the present invention compared with prior art has is:
1. the present invention is provided with primary voltage signal acquisition module and the power cell voltage signal acquisition module that can automatically detect frequency converter overvoltage fault; and when occuring, the overvoltage fault utilize main control module that high voltage converter is switched to power frequency output; send simultaneously alarm signal; automatically protection frequency converter and external equipment are avoided the generation of production accident.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one;
Fig. 2 is the operation principle block diagram of embodiment one;
Wherein: 1, power cabinet; 2, control cubicle 20, LCDs.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
Embodiment one: shown in Figure 1, and a kind of high voltage converter with over-voltage protection function, its line voltage is 6kV, adopts the IGBT of 1700V, comprises power cabinet 1, is provided with 15 power cells in the described power cabinet 1, wherein whenever comprises mutually 5 power cells.
Described high voltage converter also comprises:
Be located at the electric power incoming line place of described high voltage converter, gather and export the primary voltage signal acquisition module of the input voltage signal of described high voltage converter;
Be located at the power cell A1 place of the A phase of described high voltage converter, gather and export the power cell voltage signal acquisition module of the output voltage signal of described power cell A1;
Receive the input voltage signal of described high voltage converter, the output voltage signal of described power cell, and convert the output voltage signal of the input voltage signal of described high voltage converter and described power cell to the mould of digital signal output/number conversion module;
Receive described digital signal, and with this digital signal and reference voltage signal compare, the signal fusing module of output over-voltage signal;
Receive the main control module of described overvoltage signal, the described high voltage converter power frequency output of control;
Described primary voltage signal acquisition module be connected power cell voltage signal acquisition module and be connected with mould/number conversion module respectively, described mould/number conversion module, signal fusing module and main control module are electrically connected successively.
Wherein, described primary voltage signal acquisition module is the PT checkout gear; Described power cell voltage signal acquisition module is the voltage Hall element.
The main control module of described high voltage converter is located in the control cubicle 2, which is provided with LCDs 20, and the function code of described overvoltage signal and content are shown on this LCDs 20.
Described high voltage converter also comprises the warning device of the alarm signal of sending with main control module electrical connection, the described main control module of reception.
This have over-voltage protection function high voltage converter the operation principle block diagram as shown in Figure 2, its job step is as described below:
(1) utilize the primary voltage signal acquisition module that the input voltage of high voltage converter is carried out voltage signal sampling;
(2) utilize power cell voltage signal acquisition module that the output voltage of one of them power cell of high voltage converter is carried out voltage signal sampling;
(3) utilize mould/number conversion module that the input voltage signal of the described high voltage converter that collects in step (1) and (2) and the output voltage signal of described power cell are carried out mould/number conversion;
(4) utilize the signal fusing module that the digital signal and the reference voltage signal that obtain in the step (3) are compared, when described digital signal output over-voltage signal during greater than reference voltage signal;
(5) overvoltage signal of the main control module receiving step (4) of high voltage converter switches high voltage converter to power frequency and exports;
(6) alarm module receives the alarm signal that main control module sends, caution staff high voltage converter generation overvoltage fault.
The above is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. the high voltage converter with over-voltage protection function comprises power cabinet, is provided with a plurality of power cells in the described power cabinet, it is characterized in that, also comprises:
Be located at the electric power incoming line place of described high voltage converter, gather and export the primary voltage signal acquisition module of the input voltage signal of described high voltage converter;
Be located at one of them power cell place of described high voltage converter, gather and export the power cell voltage signal acquisition module of the output voltage signal of described power cell;
Receive the input voltage signal of described high voltage converter, the output voltage signal of described power cell, and convert the output voltage signal of the input voltage signal of described high voltage converter and described power cell to the mould of digital signal output/number conversion module;
Receive described digital signal, and with this digital signal and reference voltage signal compare, the signal fusing module of output over-voltage signal;
Receive the main control module of described overvoltage signal, the described high voltage converter power frequency output of control;
Described primary voltage signal acquisition module be connected power cell voltage signal acquisition module and be connected with mould/number conversion module respectively, described mould/number conversion module, signal fusing module and main control module are electrically connected successively.
2. the high voltage converter with over-voltage protection function according to claim 1 is characterized in that, described primary voltage signal acquisition module is PT checkout gear or voltage Hall element;
Described power cell voltage signal acquisition module is PT checkout gear or voltage Hall element.
3. the high voltage converter with over-voltage protection function according to claim 1; it is characterized in that; the main control module of this high voltage converter is located in the control cubicle, which is provided with LCDs, and the function code of described overvoltage signal and content are shown on this LCDs.
4. the high voltage converter with over-voltage protection function according to claim 1 is characterized in that, this high voltage converter also comprises the warning device of the alarm signal of sending with main control module electrical connection, the described main control module of reception.
5. the over-voltage protection method with high voltage converter of over-voltage protection function claimed in claim 1 is characterized in that, comprises the steps:
(1) utilize the primary voltage signal acquisition module that the input voltage of high voltage converter is carried out voltage signal sampling;
(2) utilize power cell voltage signal acquisition module that the output voltage of one of them power cell of high voltage converter is carried out voltage signal sampling;
(3) utilize mould/number conversion module that the input voltage signal of the described high voltage converter that collects in step (1) and (2) and the output voltage signal of described power cell are carried out mould/number conversion;
(4) utilize the signal fusing module that the digital signal and the reference voltage signal that obtain in the step (3) are compared, when described digital signal output over-voltage signal during greater than reference voltage signal;
(5) overvoltage signal of the main control module receiving step (4) of high voltage converter switches high voltage converter to power frequency and exports;
(6) alarm module receives the alarm signal that main control module sends, caution staff high voltage converter generation overvoltage fault.
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| CN2013100204803A CN103051199A (en) | 2013-01-21 | 2013-01-21 | High-voltage frequency converter with over-voltage protection function and over-voltage protection method of frequency converter |
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| CN2013100204803A CN103051199A (en) | 2013-01-21 | 2013-01-21 | High-voltage frequency converter with over-voltage protection function and over-voltage protection method of frequency converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111145529A (en) * | 2019-12-31 | 2020-05-12 | 深圳市库马克新技术股份有限公司 | Communication method of cascaded power unit of high-voltage frequency converter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1719709A (en) * | 2005-08-04 | 2006-01-11 | 上海思源电气股份有限公司 | Low interference frequency change power for high-voltage testing |
| EP1657808A2 (en) * | 2004-11-11 | 2006-05-17 | Vacon Oyj | Frequency converter overvoltage protection |
| CN201426052Y (en) * | 2009-05-22 | 2010-03-17 | 邢建忠 | Power-type multiple safety protection intelligent electricity-saving system |
| CN101969189A (en) * | 2010-11-25 | 2011-02-09 | 煤炭科学研究总院重庆研究院 | Input over-voltage protection device of frequency converter |
| CN102163925A (en) * | 2010-02-17 | 2011-08-24 | 株式会社安川电机 | Control apparatus for matrix converter |
| CN203166770U (en) * | 2013-01-21 | 2013-08-28 | 江苏力普电子科技有限公司 | High voltage frequency converter having overvoltage protection function |
-
2013
- 2013-01-21 CN CN2013100204803A patent/CN103051199A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1657808A2 (en) * | 2004-11-11 | 2006-05-17 | Vacon Oyj | Frequency converter overvoltage protection |
| CN1719709A (en) * | 2005-08-04 | 2006-01-11 | 上海思源电气股份有限公司 | Low interference frequency change power for high-voltage testing |
| CN201426052Y (en) * | 2009-05-22 | 2010-03-17 | 邢建忠 | Power-type multiple safety protection intelligent electricity-saving system |
| CN102163925A (en) * | 2010-02-17 | 2011-08-24 | 株式会社安川电机 | Control apparatus for matrix converter |
| CN101969189A (en) * | 2010-11-25 | 2011-02-09 | 煤炭科学研究总院重庆研究院 | Input over-voltage protection device of frequency converter |
| CN203166770U (en) * | 2013-01-21 | 2013-08-28 | 江苏力普电子科技有限公司 | High voltage frequency converter having overvoltage protection function |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111145529A (en) * | 2019-12-31 | 2020-05-12 | 深圳市库马克新技术股份有限公司 | Communication method of cascaded power unit of high-voltage frequency converter |
| CN111145529B (en) * | 2019-12-31 | 2023-10-13 | 深圳库马克科技有限公司 | Communication method of cascade power unit of high-voltage frequency converter |
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Application publication date: 20130417 |