CN105958835B - A kind of high-voltage frequency converter dead electricity crossing method based on instantaneous power control - Google Patents
A kind of high-voltage frequency converter dead electricity crossing method based on instantaneous power control Download PDFInfo
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- CN105958835B CN105958835B CN201610490381.5A CN201610490381A CN105958835B CN 105958835 B CN105958835 B CN 105958835B CN 201610490381 A CN201610490381 A CN 201610490381A CN 105958835 B CN105958835 B CN 105958835B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of high-voltage frequency converter dead electricity crossing method based on instantaneous power control, characterized in that including sampling input current, input voltage, and calculate input power in real time；Sampling frequency converter output current, output voltageU o , and output power is calculated in real time；When the difference between the Instantaneous input power that instantaneous output and sampling that system detectio to instantaneous power-down, power governor calculate sampling calculate carries out PID adjusting controls, the variable quantity of output frequency；The frequency variation of high-voltage frequency converter pulse width modulated wave is adjusted with the variable quantity of the frequency.Advantage：1）High-voltage frequency converter does not trip in power grid instantaneous power-down, ensures that frequency converter is continually and steadily run；2）The busbar voltage detection that power module need not be detected is not take up master control system and module normal communication resource without increasing device；3）Control is simple, and fast response time is adaptable.
Description
Technical field
The present invention relates to a kind of high-voltage frequency converters, and in particular to a kind of high-voltage frequency converter dead electricity based on instantaneous power control
Crossing method belongs to power electronics automatic control technology field.
Background technology
With the continuous development of power electronics and power drives profession, more and more high-voltage frequency converters are applied to large-scale electricity
In power dragging system, various live adaptability problems are emerged, more stringent requirements are proposed to the performance of high-voltage frequency converter.
Due to busbar switching, high pressure is closed a floodgate, and the arc extinguishing of high-voltage fence, the factors such as demagnetization can all cause falling in short-term for power grid
Electricity.The phenomenon that conventional high-tension frequency converter will produce trip protection.And when technique does not allow dragging system to be stopped, just generate
Adaptability problem.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies of existing technologies, provide a kind of based on instantaneous power control
High-voltage frequency converter dead electricity crossing method, realize in real time detection network voltage, after power system restoration is normal, and automatically switch to just
Normal shaping modes.
In order to solve the above technical problems, the present invention provides a kind of high-voltage frequency converter dead electricity leap based on instantaneous power control
Method, characterized in that include the following steps：
1) network voltage is detected in real time, and in power grid instantaneous power-down, power governor switches to instantaneous power control mould
Formula, real-time sampling input currentI i , input voltageU i , and input power is calculated in real timeP in ；Sampling frequency converter output currentI o 、
Output voltageU o , and output feedback power is calculated in real timeP out ；
2) during power grid instantaneous power-down, instantaneous output and sampling calculating that power governor calculates sampling
Difference △ between Instantaneous input powerPCarry out PID adjusting controls, the variable quantity △ of output frequencyf；With the variation of the frequency
Measure △fThe frequency variation for adjusting high-voltage frequency converter pulse width modulated wave balances to automatically adjust input power with output power, surely
Determine the DC bus-bar voltage of power cell；
3) network voltage is detected in real time, and after network voltage recovery, power governor switches to normal control mode, defeated
Go out frequency by the target frequency before automatic lifting to power grid instantaneous power-down.
Further, the DC bus-bar voltage of the power cell is by instantaneous power control, without detecting power cell
DC bus-bar voltage, effectively inhibit power cell DC bus-bar voltage fluctuation.
Further, the high-voltage frequency converter uses AC and DC hybrid transmission system, power cell to have dc-link capacitance, load
Using large inertia load.
The advantageous effect that the present invention is reached：
1）High-voltage frequency converter does not trip in power grid instantaneous power-down, ensures that frequency converter is continually and steadily run；
2）The busbar voltage detection that power module need not be detected is not take up master control system and module without increasing device
Normal communication resource；
3）Control is simple, and fast response time is adaptable.
Description of the drawings
Fig. 1 is the control structure block diagram of the present invention；
Fig. 2 is the software flow pattern of the present invention.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
A kind of high-voltage frequency converter dead electricity crossing method based on instantaneous power control, this method in power grid instantaneous power-down,
Output power and input power are calculated in real time, pass through pi regulator, output frequency regulated quantity, to automatically adjust the defeated of frequency converter
Go out power, ensures power module not dead electricity, maintain in normal range of operation.
Detection network voltage in real time, after power system restoration is normal, and automatically switches to normal regulating mode.
A kind of high-voltage frequency converter dead electricity crossing method based on instantaneous power control, characterized in that include the following steps：
1) network voltage is detected in real time, and in power grid instantaneous power-down, power governor switches to instantaneous power control mould
Formula, real-time sampling input currentI i , input voltageU i , and input power is calculated in real timeP in ；Sampling frequency converter output currentI o 、
Output voltageU o , and output feedback power is calculated in real timeP out ；
2) during power grid instantaneous power-down, instantaneous output and sampling calculating that power governor calculates sampling
Difference △ between Instantaneous input powerPCarry out PID adjusting controls, the variable quantity △ of output frequencyf；The high-voltage frequency converter is logical
Cross output frequencycIt is superimposed with target frequency variation delta, obtains the high-voltage frequency converter mesh in instantaneous power-down and quick frequency reducing
Mark frequencyd, balanced with output power to automatically adjust input power, the DC bus-bar voltage of firm power unit；
3) network voltage is detected in real time, and after network voltage recovery, power governor switches to normal control mode, defeated
Go out frequency by the target frequency before automatic lifting to power grid instantaneous power-down.
As illustrated in fig. 1 and 2, a kind of high-voltage frequency converter dead electricity crossing method based on instantaneous power control includes that sampling inputs
Electric currentI i , input voltageU i , and input power is calculated in real timeP in ；Sampling frequency converter output currentI o , output voltageU o , and it is real
When calculate output feedback powerP out ；When the instantaneous output that system detectio to instantaneous power-down, power governor calculate sampling
Difference △ between the Instantaneous input power calculated with samplingPCarry out PID adjusting controls, the variable quantity △ of output frequencyf；With institute
State the variable quantity △ of frequencyfAdjust the frequency variation of high-voltage frequency converter pulse width modulated wave.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of high-voltage frequency converter dead electricity crossing method based on instantaneous power control, characterized in that include the following steps：
1) network voltage is detected in real time, and in power grid instantaneous power-down, power governor switches to instantaneous power control pattern, real
When sample input currentI i , input voltageU i , and input power is calculated in real timeP in ；Sampling frequency converter output currentI o , output electricity
PressureU o , and output power is calculated in real timeP out ；
2) during power grid instantaneous power-down, instantaneous output and sample the instantaneous of calculating that power governor calculates sampling
Difference △ between input powerPCarry out PID adjusting controls, the variable quantity △ of output frequencyf；With the variable quantity △ of the frequencyfThe frequency variation for adjusting high-voltage frequency converter pulse width modulated wave balances with output power to automatically adjust input power, stablizes work(
The DC bus-bar voltage of rate unit；
3) network voltage is detected in real time, and after network voltage recovery, power governor switches to normal control mode, output frequency
Rate is by the target frequency before automatic lifting to power grid instantaneous power-down.
2. a kind of high-voltage frequency converter dead electricity crossing method based on instantaneous power control according to claim 1, feature
It is,
The DC bus-bar voltage of the power cell is by instantaneous power control, without detecting the DC bus electricity of power cell
Pressure effectively inhibits the fluctuation of the DC bus-bar voltage of power cell.
3. special according to a kind of high-voltage frequency converter dead electricity crossing method based on instantaneous power control described in claim 1
Sign is that the high-voltage frequency converter uses AC and DC hybrid transmission system, power cell to have dc-link capacitance, load negative using big inertia
It carries.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610490381.5A CN105958835B (en) | 2016-06-28 | 2016-06-28 | A kind of high-voltage frequency converter dead electricity crossing method based on instantaneous power control |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610490381.5A CN105958835B (en) | 2016-06-28 | 2016-06-28 | A kind of high-voltage frequency converter dead electricity crossing method based on instantaneous power control |
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| CN105958835A CN105958835A (en) | 2016-09-21 |
| CN105958835B true CN105958835B (en) | 2018-07-13 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108054786B (en) * | 2017-11-23 | 2019-07-02 | 国电南京自动化股份有限公司 | The control method of the cascaded high-voltage frequency converter of function is passed through with high-low voltage |
| CN110806504B (en) * | 2018-08-03 | 2021-11-02 | 炬芯科技股份有限公司 | Charging power supply detection circuit and detection method |
| CN114465545A (en) * | 2022-02-23 | 2022-05-10 | 哈尔滨昇悦生物科技有限公司 | Power control method of frequency converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986403A (en) * | 2014-05-30 | 2014-08-13 | 台达电子企业管理（上海）有限公司 | Variable-frequency speed control system and method |
| JP2015133785A (en) * | 2014-01-10 | 2015-07-23 | 田淵電機株式会社 | Single operation detector and single operation detection method |
| CN105227042A (en) * | 2015-10-15 | 2016-01-06 | 中国人民解放军海军工程大学 | The dead electricity of high-power high voltage frequency converter crosses over control method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015133785A (en) * | 2014-01-10 | 2015-07-23 | 田淵電機株式会社 | Single operation detector and single operation detection method |
| CN103986403A (en) * | 2014-05-30 | 2014-08-13 | 台达电子企业管理（上海）有限公司 | Variable-frequency speed control system and method |
| CN105227042A (en) * | 2015-10-15 | 2016-01-06 | 中国人民解放军海军工程大学 | The dead electricity of high-power high voltage frequency converter crosses over control method |
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