CN104578818A - High-frequency high-voltage power supply used for electrostatic precipitation and control method - Google Patents
High-frequency high-voltage power supply used for electrostatic precipitation and control method Download PDFInfo
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- CN104578818A CN104578818A CN201310500937.0A CN201310500937A CN104578818A CN 104578818 A CN104578818 A CN 104578818A CN 201310500937 A CN201310500937 A CN 201310500937A CN 104578818 A CN104578818 A CN 104578818A
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Abstract
The invention discloses a high-frequency high-voltage power supply used for electrostatic precipitation and a control method. The high-frequency high-voltage power supply includes a three-phase full-bridge rectifier filter circuit, an IGBT full-bridge inverter circuit, a high frequency transformer, a sampling circuit for detecting the secondary voltage and the secondary current of the high frequency transformer, a flashover current detection circuit for detecting the current generated when flashover occurs in the electric field of an electrostatic precipitator, and a control circuit for reducing the working voltage of the electric field of the electrostatic precipitator when flashover occurs in the electric field of the electrostatic precipitator and the secondary current does not exceed the current limit, and executing protective actions when flashover occurs in the electric field of the electrostatic precipitator and the secondary current exceeds the current limit, according to the current generated when flashover occurs in the electric field of the electrostatic precipitator as well as the secondary voltage and the secondary current of the high frequency transformer. The control method provided by the invention realizes the control over the high-frequency high-voltage power supply depending on the change in the secondary current of the high frequency transformer when flashover occurs in the electric field of the electrostatic precipitator, thereby ensuring the running stability and reliability of the high-frequency high-voltage power supply.
Description
Technical field
The present invention relates to a kind of electrostatic precipitation high-frequency and high-voltage power supply and control method.
Background technology
In industrial air pollution control procedure, electrostatic precipitator occupies critical positions, it runs the whether reliable and stable direct effect affecting electric precipitation and Environmental capacity, electrostatic precipitator often causes the inner frequent flashover of electric field because of the hidden danger such as insulation distance grade is not high, discharge electrode easy fracture, dust collector pole bite or defect, and then causes voltage of electric field cannot raise and often tripping fault occur.
Summary of the invention
The present invention is directed to the proposition of above problem, and develop a kind of electrostatic precipitation high-frequency and high-voltage power supply and control method.
Technological means of the present invention is as follows:
A kind of electrostatic precipitation high-frequency and high-voltage power supply, comprising:
The three phase full bridge current rectifying and wave filtering circuit be connected with three-phase main-frequency AC power;
The IGBT full bridge inverter be connected with three phase full bridge current rectifying and wave filtering circuit;
The high frequency transformer be connected with IGBT full bridge inverter; Described high frequency transformer is secondary to be connected with electric precipitation electric field;
Be connected with high frequency transformer is secondary, for detecting the sample circuit of high frequency transformer secondary voltage and secondary current;
Be connected with electric precipitation electric field, flashover current testing circuit current generated during for detecting electric precipitation electric field generation flashover;
Be connected with IGBT full bridge inverter with sample circuit, flashover current testing circuit, for detect according to flashover current testing circuit electric precipitation electric field generation flashover time the high frequency transformer secondary voltage that detects of current generated and sample circuit and secondary current, when electric precipitation electric field generation flashover reduces electric precipitation electric field working voltage by control IGBT full bridge inverter when secondary current does not exceed current limit simultaneously, when electric precipitation electric field generation flashover performs the control circuit of protection act when secondary current exceedes current limit simultaneously;
A control method for electrostatic precipitation high-frequency and high-voltage power supply, comprises the steps:
1. current generated during flashover current testing circuit detection electric precipitation electric field generation flashover;
2. sample circuit detects high frequency transformer secondary voltage and secondary current;
3. control circuit detect according to flashover current testing circuit electric precipitation electric field generation flashover time the high frequency transformer secondary voltage that detects of current generated and sample circuit and secondary current; when electric precipitation electric field generation flashover reduces electric precipitation electric field working voltage by control IGBT full bridge inverter when secondary current does not exceed current limit simultaneously, when electric precipitation electric field generation flashover performs protection act when secondary current exceedes current limit simultaneously.
Owing to have employed technique scheme, a kind of electrostatic precipitation high-frequency and high-voltage power supply provided by the invention and control method, by detecting the flashover of electric precipitation electric field and high frequency transformer secondary voltage and secondary current, realize controlling high-frequency and high-voltage power supply according to the change of different high frequency transformer secondary currents when electric precipitation electric field generation flashover, and then it is reliable and stable to ensure that high-frequency and high-voltage power supply runs.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention.
Embodiment
A kind of electrostatic precipitation high-frequency and high-voltage power supply as shown in Figure 1, comprising: the three phase full bridge current rectifying and wave filtering circuit be connected with three-phase main-frequency AC power; The IGBT full bridge inverter be connected with three phase full bridge current rectifying and wave filtering circuit; The high frequency transformer be connected with IGBT full bridge inverter; Described high frequency transformer is secondary to be connected with electric precipitation electric field; Be connected with high frequency transformer is secondary, for detecting the sample circuit of high frequency transformer secondary voltage and secondary current; Be connected with electric precipitation electric field, flashover current testing circuit current generated during for detecting electric precipitation electric field generation flashover; Be connected with IGBT full bridge inverter with sample circuit, flashover current testing circuit, for detect according to flashover current testing circuit electric precipitation electric field generation flashover time the high frequency transformer secondary voltage that detects of current generated and sample circuit and secondary current, when electric precipitation electric field generation flashover reduces electric precipitation electric field working voltage by control IGBT full bridge inverter when secondary current does not exceed current limit simultaneously, when electric precipitation electric field generation flashover performs the control circuit of protection act when secondary current exceedes current limit simultaneously;
A control method for electrostatic precipitation high-frequency and high-voltage power supply, comprises the steps:
1. current generated during flashover current testing circuit detection electric precipitation electric field generation flashover;
2. sample circuit detects high frequency transformer secondary voltage and secondary current;
3. control circuit detect according to flashover current testing circuit electric precipitation electric field generation flashover time the high frequency transformer secondary voltage that detects of current generated and sample circuit and secondary current; when electric precipitation electric field generation flashover reduces electric precipitation electric field working voltage by control IGBT full bridge inverter when secondary current does not exceed current limit simultaneously, when electric precipitation electric field generation flashover performs protection act when secondary current exceedes current limit simultaneously.
A kind of electrostatic precipitation high-frequency and high-voltage power supply provided by the invention and control method, by detecting the flashover of electric precipitation electric field and high frequency transformer secondary voltage and secondary current, realize controlling high-frequency and high-voltage power supply according to the change of different high frequency transformer secondary currents when electric precipitation electric field generation flashover, and then it is reliable and stable to ensure that high-frequency and high-voltage power supply runs.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (2)
1. an electrostatic precipitation high-frequency and high-voltage power supply, is characterized in that comprising:
The three phase full bridge current rectifying and wave filtering circuit be connected with three-phase main-frequency AC power;
The IGBT full bridge inverter be connected with three phase full bridge current rectifying and wave filtering circuit;
The high frequency transformer be connected with IGBT full bridge inverter; Described high frequency transformer is secondary to be connected with electric precipitation electric field;
Be connected with high frequency transformer is secondary, for detecting the sample circuit of high frequency transformer secondary voltage and secondary current;
Be connected with electric precipitation electric field, flashover current testing circuit current generated during for detecting electric precipitation electric field generation flashover;
Be connected with IGBT full bridge inverter with sample circuit, flashover current testing circuit; for detect according to flashover current testing circuit electric precipitation electric field generation flashover time the high frequency transformer secondary voltage that detects of current generated and sample circuit and secondary current; when electric precipitation electric field generation flashover reduces electric precipitation electric field working voltage by control IGBT full bridge inverter when secondary current does not exceed current limit simultaneously, when electric precipitation electric field generation flashover performs the control circuit of protection act when secondary current exceedes current limit simultaneously.
2. a control method for electrostatic precipitation high-frequency and high-voltage power supply, is characterized in that comprising the steps:
1. current generated during flashover current testing circuit detection electric precipitation electric field generation flashover;
2. sample circuit detects high frequency transformer secondary voltage and secondary current;
3. control circuit detect according to flashover current testing circuit electric precipitation electric field generation flashover time the high frequency transformer secondary voltage that detects of current generated and sample circuit and secondary current; when electric precipitation electric field generation flashover reduces electric precipitation electric field working voltage by control IGBT full bridge inverter when secondary current does not exceed current limit simultaneously, when electric precipitation electric field generation flashover performs protection act when secondary current exceedes current limit simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310500937.0A CN104578818A (en) | 2013-10-21 | 2013-10-21 | High-frequency high-voltage power supply used for electrostatic precipitation and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310500937.0A CN104578818A (en) | 2013-10-21 | 2013-10-21 | High-frequency high-voltage power supply used for electrostatic precipitation and control method |
Publications (1)
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| CN104578818A true CN104578818A (en) | 2015-04-29 |
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| CN201310500937.0A Pending CN104578818A (en) | 2013-10-21 | 2013-10-21 | High-frequency high-voltage power supply used for electrostatic precipitation and control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109365135A (en) * | 2018-10-18 | 2019-02-22 | 华能辛店发电有限公司 | A kind of thermal power plant's dust pelletizing system intelligent power saving autocontrol method |
| CN109365134A (en) * | 2018-10-18 | 2019-02-22 | 西安西热锅炉环保工程有限公司 | The autocontrol method of dust pelletizing system in a kind of coal generating system |
| CN112934468A (en) * | 2021-01-27 | 2021-06-11 | 华能国际电力股份有限公司营口电厂 | Method for preventing frequent flashover of electric precipitation system |
| CN114100860A (en) * | 2022-01-29 | 2022-03-01 | 华能平凉发电有限责任公司 | Flashover voltage control method and device for electric dust collector |
-
2013
- 2013-10-21 CN CN201310500937.0A patent/CN104578818A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109365135A (en) * | 2018-10-18 | 2019-02-22 | 华能辛店发电有限公司 | A kind of thermal power plant's dust pelletizing system intelligent power saving autocontrol method |
| CN109365134A (en) * | 2018-10-18 | 2019-02-22 | 西安西热锅炉环保工程有限公司 | The autocontrol method of dust pelletizing system in a kind of coal generating system |
| CN109365134B (en) * | 2018-10-18 | 2020-05-05 | 西安西热锅炉环保工程有限公司 | Automatic control method of dust removal system in coal-fired power generation system |
| CN112934468A (en) * | 2021-01-27 | 2021-06-11 | 华能国际电力股份有限公司营口电厂 | Method for preventing frequent flashover of electric precipitation system |
| CN114100860A (en) * | 2022-01-29 | 2022-03-01 | 华能平凉发电有限责任公司 | Flashover voltage control method and device for electric dust collector |
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Application publication date: 20150429 |