CN104104237A - Frequency converter having high/low voltage ride-through function - Google Patents
Frequency converter having high/low voltage ride-through function Download PDFInfo
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- CN104104237A CN104104237A CN201410280116.5A CN201410280116A CN104104237A CN 104104237 A CN104104237 A CN 104104237A CN 201410280116 A CN201410280116 A CN 201410280116A CN 104104237 A CN104104237 A CN 104104237A
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Abstract
The invention relates to a frequency converter having high/low voltage ride-through function, belonging to the technical field of an electrical apparatus. The frequency converter comprises a super capacitor, a bidirectional DC-DC converter and a frequency converter, wherein the super capacitor is connected in parallel with a low-voltage side of the bidirectional DC-DC converter, a high-voltage side of the bidirectional DC-DC converter is connected in parallel with a DC end between a frequency converter rectification unit and frequency converter inversion unit of the frequency converter, the bidirectional DC-DC converter comprises insulated gate bipolar transistor pair tubes and a DC inductor, one end of the DC inductor is connected with the anode of the super capacitor, the cathode of the super capacitor is connected with an emitter of a lower tube of the insulated gate bipolar transistor pair tubes, and the other end of the DC inductor is connected with an emitter of an upper tube of the insulated gate bipolar transistor pair tubes. The frequency converter has the advantages of very fast response speed, working stability and high cost performance, and is convenient to maintain and simple to operate, and cost can be effectively saved.
Description
Technical field
The present invention relates to a kind of frequency converter that possesses high low voltage ride-through function, belong to electrical equipment technical field.
Background technology
Because modern industry production improves constantly the requirement of power quality, electric power system supply voltage falls, rising or interruption meeting normally move affecting production process, especially for production technologies such as petrochemical industry, papermaking, power plants, can cause fatal infringement, this class sensitive load is conventionally by transducer drive, and typical sensitive load comprises the power type loads such as blower fan, water pump.According to internal authority mechanism statistics, because voltage falls, the loss that the problems such as production line disorder that rising or disruption cause cause, has been account for power supply quality problem over half.Therefore, from user's side, take new and high technology means to reduce and the harm avoiding voltage to fall bringing has become the pressing issues of modern enterprise power supply technique.
Along with the development of energy storage technology, super capacitor is as typical energy storage device because increase useful life, and discharge capability is strengthened, cost and being widely used.And two-way DC-DC converter and frequency converter have been very ripe power electronic equipments.Along with the development of modern industry, also more and more higher to the requirement of power supply quality, to have the frequency converter demand of high low voltage ride-through function more and more urgent in reply mutually.The frequency converter product that exploitation has a high low voltage ride-through function can meet the demand in market, promotes the improvement level of the electrical network quality of power supply.
Frequency converter cannot effectively overcome electric power system transient voltage problem at present, can cause frequency converter DC over-voltage protection, and quit work when electric power system voltage raises; When electric power system lower voltage or interruption, frequency converter can quit work equally.Therefore when transient voltage fault appears in electric power system, current frequency converter normally work influence production process normally moves.
Summary of the invention
The object of the invention is to propose a kind of frequency converter that possesses high low voltage ride-through function; a DC terminal two-way DC-DC converter in parallel of existing frequency converter; in electric power system fault, make system power supply lower voltage, power-off or rising; cause frequency converter to be shut down and when affect production procedure and normally moving, assurance frequency converter still can normally move.
The frequency converter that possesses high low voltage ride-through function that the present invention proposes, comprise: super capacitor, two-way DC-DC converter and frequency converter, described frequency converter is comprised of frequency converter rectification unit and frequency converter inversion unit, the ac input end of frequency converter rectification unit is connected with system power supply, and the ac output end of frequency converter inversion unit is connected with load; Described super capacitor is in parallel with the low-pressure side of two-way DC-DC converter, and the high-pressure side of two-way DC-DC converter is in parallel with the DC terminal between frequency converter rectification unit in frequency converter and frequency converter inversion unit; Described two-way DC-DC converter comprises that insulated gate bipolar transistor is to pipe B1 and DC inductance L1; Described one end of DC inductance L1 and the positive pole of super capacitor are connected, the negative pole of super capacitor is connected the lower pipe emitter of pipe B1 with insulated gate bipolar transistor, and the other end of DC inductance L1 is connected the upper pipe emitter of pipe B1 with insulated gate bipolar transistor.
The frequency converter that possesses high low voltage ride-through function that the present invention proposes; its advantage is: frequency converter of the present invention can occur the transient faults such as lower voltage, rising or interruption at electric power system power supply and cause frequency converter to be shut down and when affecting production procedure and normally moving; guarantee that frequency converter still can normally move, continuous firing.Frequency converter of the present invention has high low voltage ride-through function, not only has the response speed of being exceedingly fast, steady operation and other merits, and simple in structure, has effectively saved product cost, be convenient to safeguard, and easy operating, cost performance is higher.
Accompanying drawing explanation
Fig. 1 is the frequency convertor system circuit theory diagrams that the present invention possesses high low voltage ride-through function.
Embodiment
The frequency converter that possesses high low voltage ride-through function that the present invention proposes, its structure as shown in Figure 1, comprise: super capacitor, two-way DC-DC converter and frequency converter, described frequency converter is comprised of frequency converter rectification unit and frequency converter inversion unit, the ac input end of frequency converter rectification unit is connected with system power supply, and the ac output end of frequency converter inversion unit is connected with load M; Described super capacitor is in parallel with the low-pressure side of two-way DC-DC converter, and the high-pressure side of two-way DC-DC converter is in parallel with the DC terminal between frequency converter rectification unit in frequency converter and frequency converter inversion unit; Described two-way DC-DC converter comprises that insulated gate bipolar transistor is to pipe B1 and DC inductance L1; Described one end of DC inductance L1 and the positive pole of super capacitor are connected, the negative pole of super capacitor is connected the lower pipe emitter of pipe B1 with insulated gate bipolar transistor, and the other end of DC inductance L1 is connected the upper pipe emitter of pipe B1 with insulated gate bipolar transistor.
Below in conjunction with accompanying drawing, introduce in detail operation principle and the course of work of the frequency converter that possesses high low voltage ride-through function of the present invention's proposition:
Figure 1 shows that the frequency convertor system circuit theory diagrams that possess high low voltage ride-through function that the present invention proposes.When system power supply voltage is normal, the normal work of transducer drive load, frequency converter DC terminal discharges and recharges control by two-way DC-DC converter to super capacitor simultaneously.Described two-way DC-DC converter has constant current charge and two kinds of charge modes of floating charge to super capacitor charging, when super capacitor capacity carries out constant current charge during lower than desired value, carries out floating charge when super capacitor capacity reaches desired value.Described two-way DC-DC converter is constant voltage discharge mode of operation to frequency converter DC terminal, when frequency converter DC terminal voltage starts the constant voltage discharge mode of operation to super capacitor during lower than desired value, guarantees that frequency converter output voltage amplitude keeps constant.Described in when system voltage raises, frequency converter DC terminal can be born 1.3 times of system power supply rated line voltage peak values, frequency converter has constant voltage output function simultaneously, guarantee that frequency converter output voltage amplitude when system power supply voltage raises remains constant, and sustainable normal work.
Claims (1)
1. a frequency converter that possesses high low voltage ride-through function, it is characterized in that this frequency converter comprises: super capacitor, two-way DC-DC converter and frequency converter, described frequency converter is comprised of frequency converter rectification unit and frequency converter inversion unit, the ac input end of frequency converter rectification unit is connected with system power supply, and the ac output end of frequency converter inversion unit is connected with load; Described super capacitor is in parallel with the low-pressure side of two-way DC-DC converter, and the high-pressure side of two-way DC-DC converter is in parallel with the DC terminal between frequency converter rectification unit in frequency converter and frequency converter inversion unit; Described two-way DC-DC converter comprises that insulated gate bipolar transistor is to pipe and DC inductance; One end of described DC inductance is connected with the positive pole of super capacitor, and the negative pole of super capacitor is connected the lower pipe emitter of pipe with insulated gate bipolar transistor, and the other end of DC inductance is connected the upper pipe emitter of pipe with insulated gate bipolar transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410280116.5A CN104104237A (en) | 2014-06-20 | 2014-06-20 | Frequency converter having high/low voltage ride-through function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410280116.5A CN104104237A (en) | 2014-06-20 | 2014-06-20 | Frequency converter having high/low voltage ride-through function |
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| Publication Number | Publication Date |
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| CN104104237A true CN104104237A (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410280116.5A Pending CN104104237A (en) | 2014-06-20 | 2014-06-20 | Frequency converter having high/low voltage ride-through function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600831A (en) * | 2015-01-23 | 2015-05-06 | 南京南瑞继保电气有限公司 | Inverter auxiliary power supply system and method |
| CN105991040A (en) * | 2015-02-10 | 2016-10-05 | 神华集团有限责任公司 | Frequency converter power unit and frequency converter |
| CN106059061A (en) * | 2016-07-18 | 2016-10-26 | 杭州电子科技大学 | Frequency converter high voltage suppression method combining low voltage ride through support |
| CN107645203A (en) * | 2016-07-21 | 2018-01-30 | 阿里巴巴集团控股有限公司 | Energy storage frequency convertor system |
| CN107659295A (en) * | 2016-07-26 | 2018-02-02 | 奥特润株式会社 | Isolated gate driver and the power device drive system for including it |
| CN109861534A (en) * | 2019-03-13 | 2019-06-07 | 广州供电局有限公司 | Compensation device temporarily drops in DC voltage and compensation method temporarily drops in DC voltage |
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| CN1835329A (en) * | 2006-04-10 | 2006-09-20 | 中国科学院电工研究所 | Hybrid accumulator for elevator and control method thereof |
| CN102372201A (en) * | 2010-08-26 | 2012-03-14 | 上海三菱电梯有限公司 | Elevator energy storage device |
| CN103303759A (en) * | 2013-06-20 | 2013-09-18 | 天津大学 | Super capacitive energy storage elevator self-rescue device |
| CN103916069A (en) * | 2014-04-11 | 2014-07-09 | 天津鑫宝龙电梯集团有限公司 | Supercapacitor energy storing type elevator discharge control protector |
| CN203933414U (en) * | 2014-06-20 | 2014-11-05 | 任磊 | A kind of frequency converter that possesses high low voltage ride-through function |
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2014
- 2014-06-20 CN CN201410280116.5A patent/CN104104237A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1835329A (en) * | 2006-04-10 | 2006-09-20 | 中国科学院电工研究所 | Hybrid accumulator for elevator and control method thereof |
| CN102372201A (en) * | 2010-08-26 | 2012-03-14 | 上海三菱电梯有限公司 | Elevator energy storage device |
| CN103303759A (en) * | 2013-06-20 | 2013-09-18 | 天津大学 | Super capacitive energy storage elevator self-rescue device |
| CN103916069A (en) * | 2014-04-11 | 2014-07-09 | 天津鑫宝龙电梯集团有限公司 | Supercapacitor energy storing type elevator discharge control protector |
| CN203933414U (en) * | 2014-06-20 | 2014-11-05 | 任磊 | A kind of frequency converter that possesses high low voltage ride-through function |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600831A (en) * | 2015-01-23 | 2015-05-06 | 南京南瑞继保电气有限公司 | Inverter auxiliary power supply system and method |
| CN105991040A (en) * | 2015-02-10 | 2016-10-05 | 神华集团有限责任公司 | Frequency converter power unit and frequency converter |
| CN106059061A (en) * | 2016-07-18 | 2016-10-26 | 杭州电子科技大学 | Frequency converter high voltage suppression method combining low voltage ride through support |
| CN106059061B (en) * | 2016-07-18 | 2018-11-13 | 杭州电子科技大学 | A kind of frequency converter high voltage suppressing method that combination low voltage crossing is supported |
| CN107645203A (en) * | 2016-07-21 | 2018-01-30 | 阿里巴巴集团控股有限公司 | Energy storage frequency convertor system |
| CN107659295A (en) * | 2016-07-26 | 2018-02-02 | 奥特润株式会社 | Isolated gate driver and the power device drive system for including it |
| CN107659295B (en) * | 2016-07-26 | 2021-03-16 | 奥特润株式会社 | Isolated gate driver and power device driving system including the same |
| CN109861534A (en) * | 2019-03-13 | 2019-06-07 | 广州供电局有限公司 | Compensation device temporarily drops in DC voltage and compensation method temporarily drops in DC voltage |
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Application publication date: 20141015 |