CN104901360A - Control method for supercapacitor cascading high-voltage device - Google Patents
Control method for supercapacitor cascading high-voltage device Download PDFInfo
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- CN104901360A CN104901360A CN201510247271.1A CN201510247271A CN104901360A CN 104901360 A CN104901360 A CN 104901360A CN 201510247271 A CN201510247271 A CN 201510247271A CN 104901360 A CN104901360 A CN 104901360A
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Abstract
The invention discloses a control method for a supercapacitor cascading high-voltage device, and the method is characterized in that the control method determines the number of supercapacitors required by a supercapacitor bank in a supercapacitor bank cascading system according to a principle that the highest voltage outputted by the supercapacitor bank cascading system in the supercapacitor cascading high-voltage device is the half of the highest target voltage required by a high-voltage capacitor; controlling the output voltage of the selected supercapacitor bank to be equal to the half of the target voltage of one charging task in the charging task, employing the resonance principle to enable the voltage of the capacitor to reach twice as much as a power voltage in a half resonance period, and charging the grouped high-voltage capacitors sequentially.
Description
Technical field
The present invention relates to a kind of control method of ultracapacitor cascade high voltage power supply.
Background technology
Spark source to be discharged the device explored geological condition by high-voltage capacitor, the voltage range that its middle-and high-voltage capacitor voltage relates to be 1KV and more than, need high voltage source to charge to it.The method of original adoption 220V or 380V line voltage is formed high voltage source after Industrial Frequency Transformer boosting, rectification charge to high-voltage capacitor, and develop into afterwards and adopt high frequency switching converter technology, object is the volume reducing Industrial Frequency Transformer.The primary energy of charge power supply is generally electrical network electric energy, diesel engine generator, but in mountain area, above two kinds of primary energies are all restricted.Along with the development of supercapacitor technologies, the mode of Initial energy source is provided to become possibility by ultracapacitor, and ultracapacitor can be divided into the module of small size and weight, by manpower carry on the back vehicle be difficult to arrive area, make spark source become possibility in the application in mountain area.
Bank of super capacitors has two kinds of modes as the charging system of Initial energy source, one is that bank of super capacitors and high frequency charging electric power form charging system, bank of super capacitors provides low-voltage, high-current, is transformed into after high voltage-small current charges to capacitor through high frequency charging electric power; One adopts cascaded topology to be together in series by bank of super capacitors, directly exports high pressure and charge to capacitor.Adopt in the charging system of cascaded topology series connection in bank of super capacitors, the bank of super capacitors of every one-level is also form by multiple ultracapacitor is monomer series-connected, general ultracapacitor monomer voltage is at about 2.7V, when condenser voltage is higher, need several thousand monomer series-connected outputs of ultracapacitor, higher to the coherence request of ultracapacitor monomer.Because the otherness of ultracapacitor monomer certainly exists, during more monomer series-connected use, system failure rate is high, poor practicability, and impact uses.
Chinese patent 201010185126.2 discloses a kind of control system of cascaded inverter, and emphasis is the implementation of master control system, does not relate to the control method of cascade circuit Control timing sequence.Chinese patent 201210259287.0 discloses a kind of linear amplifier high-voltage cascade device and method, and emphasis is cascaded circuit topology, does not relate to concrete control control method.
Summary of the invention
The object of the invention is the shortcoming overcoming prior art, propose a kind of control method of ultracapacitor cascade high voltage device.The present invention can make the ultracapacitor monomer of connecting in bank of super capacitors cascaded charge power supply significantly reduce, and improves the dependable with function of charging device.The present invention is applicable to target charging voltage in 1KV and the charging of above high-voltage capacitor.
The present invention based on ultracapacitor cascade high voltage device comprise 5 parts: bank of super capacitors cascade system, control system, current-limiting inductance, high-voltage capacitor, and load control switch.After the high-pressure side series connection current-limiting inductance of bank of super capacitors cascade system High voltage output, connect the current input stage of load control switch, the circuit output stage of load control switch connects the high-pressure stage of high-voltage capacitor, and the low pressure pole of high-voltage capacitor connects ultracapacitor cascade system low-voltage output.Bank of super capacitors cascade system is in series by multiple bank of super capacitors, each bank of super capacitors to be connected after a control switch diode in parallel again, one-level in composition ultracapacitor cascade system, namely forms bank of super capacitors cascade system after plural serial stage.Bank of super capacitors cascade system realizes exporting controlled high voltage source function under control system controls.
High-voltage capacitor and load control switch are M, M be more than or equal to 1 positive integer.M group high-voltage capacitor is identical with the M value in M load control switch, the value of M by high-voltage capacitor capacity, connect with ultracapacitor cascade system output cathode end current-limiting inductance inductance value, charge required time, and the maximum charging current of bank of super capacitors cascade system is determined.After the high-pressure side series connection current-limiting inductance of bank of super capacitors cascade system High voltage output, connect the current input stage of M load control switch, the circuit output stage of M load control switch connects M high-voltage capacitor high-pressure stage respectively, and the low pressure pole of M high-voltage capacitor connects ultracapacitor cascade system low-voltage output respectively.
As follows to the control method of ultracapacitor cascade high voltage device:
The half of total voltage target voltage needed for high-voltage capacitor that described bank of super capacitors cascade system exports, after high-voltage capacitor target charging voltage is determined, control system equals the principle of target charging voltage half according to bank of super capacitors output voltage sum, select the quantity of the bank of super capacitors of devoting oneself to work, then a load control switch in a control system control M load control switch closes, and control bank of super capacitors control switch at different levels in bank of super capacitors cascade system and close simultaneously, namely bank of super capacitors cascade system output voltage is simultaneously controlled, to a certain group of charging in the M group high-voltage capacitor of grouping.The voltage of this group high-voltage capacitor utilizing resonance principle to make to be connected with this load control switch reaches 2 times of bank of super capacitors cascade system output voltage when half harmonic period.Half harmonic period moment, this load control switch disconnects, terminate to charge to this group high-voltage capacitor be connected with this load control switch, then control system control another load control switch close, and control bank of super capacitors cascade system output voltage, this group high-voltage capacitor that load control switch connects therewith is charged ..., so a point sequential grouping is charged to high-voltage capacitor.This control method effectively can reduce the quantity of bank of super capacitors monomer ultracapacitor.
The classification of bank of super capacitors cascade system can according to circumstances be determined, classification is more, required control switch and diode more, the high-voltage capacitor level difference that powers on is less, classification is fewer, and bank of super capacitors cascade system is simpler, but the voltage of high-voltage capacitor is differential larger.In order to meet the charging requirement of high-voltage capacitor different target voltage, the voltage of every grade of bank of super capacitors can be different, by the voltage of the exportable different grade of the combination of bank of super capacitors.Often organize the charging interval of high-voltage capacitor
bank of super capacitors maximum output current ability need be more than or equal to
wherein U is the bank of super capacitors voltage sums at different levels of devoting oneself to work when various combination, and L is the inductance value of the current-limiting inductance of connecting with ultracapacitor cascade system high-pressure side, C is the capacity of high-voltage capacitor.According to formula
when high-voltage capacitor capacity increases, the output current of required bank of super capacitors cascade system becomes large, bank of super capacitors output current Capability Requirement is uprised, now, for reducing the requirement of bank of super capacitors output current, high-voltage capacitor can be divided into M group, adopt the control mode of load sequential charging.During charge initiation, control system exports closure signal some in M load control switch, export the closure signal of bank of super capacitors control switch at different levels in bank of super capacitors cascade system simultaneously, control switch in bank of super capacitors at different levels is closed simultaneously, bank of super capacitors is output voltage simultaneously, to one group of charging in M group high-voltage capacitor.When charging current becomes 0, control system exports the cut-off signal of this load control switch, and this load control switch is disconnected, and in bank of super capacitors at different levels, control switch disconnects simultaneously, and bank of super capacitors stops output voltage.After waiting for that this load control switch returns to cut-off state, control system exports the closure signal organizing the load control switch that high-voltage capacitor is connected with next, export the closure signal of bank of super capacitors control switch at different levels in bank of super capacitors cascade system simultaneously, control switch in bank of super capacitors at different levels is closed simultaneously, bank of super capacitors is output voltage simultaneously, to next group high-voltage capacitor charging.
When the output current of ultracapacitor is greater than the maximum output current ability of bank of super capacitors, adopt the control mode of load sequential charging.
Good effect of the present invention is:
1. control method of the present invention significantly can reduce the series connection number of ultracapacitor monomer in cascade bank of super capacitors, improves the reliability of system.
2. the control switch of bank of super capacitors cascade system of the present invention and load control switch are operated in Sofe Switch state, effectively reduce switch ends due to voltage spikes and electromagnetic interference.
3. the present invention adopts the mode of grouping sequential charging to high-voltage capacitor, in the charging occasion of the larger Large Copacity high-voltage capacitor of required bank of super capacitors cascade system output current, the inductance value of current-limiting inductance and the requirement to the current capacity that bank of super capacitors exports effectively can be reduced.
4. the method adopts the formation DC source of bank of super capacitors cascade, achieves the feature of vast capacity, long service life, ultrafast DC source accumulation of energy, applicable cryogenic conditions.
The present invention can be used for the fast charging and discharging field of high-power high voltage power supply, especially not high to load voltage required precision occasion, is specially adapted to spark source charging.
Accompanying drawing explanation
Fig. 1 is the present invention based on the structure composition schematic diagram of ultracapacitor cascade high voltage device, in figure: 1 bank of super capacitors cascade system, 2 control system, 3 current-limiting inductances, 4 high-voltage capacitors, 5 load control switch;
Fig. 2 is the circuit topology of embodiment;
Fig. 3 is the Control timing sequence that in embodiment, control system exports.
Embodiment
The present invention is further illustrated below in conjunction with the drawings and the specific embodiments.
As shown in Figure 1, the present invention based on ultracapacitor cascade high voltage device comprise 5 parts: bank of super capacitors cascade system 1, control system 2, current-limiting inductance 3, M group high-voltage capacitor 4, and M load control switch 5.After the high-pressure side series connection current-limiting inductance 3 of bank of super capacitors cascade system 1 High voltage output, connect the current input stage of M load control switch 5, the circuit output stage of M load control switch 5 connects the high-pressure stage of M group high-voltage capacitor 4 respectively, and the low pressure pole of M group high-voltage capacitor 4 connects the low-voltage output of ultracapacitor cascade system 1 respectively.Bank of super capacitors cascade system 1 is in series by multiple bank of super capacitors, each bank of super capacitors to be connected after a control switch diode in parallel again, one-level in composition ultracapacitor cascade system, namely forms bank of super capacitors cascade system after plural serial stage.
The control method of the present invention to ultracapacitor cascade high voltage device is as follows:
First according to the ceiling voltage that the voltage determination ultracapacitor cascade system of high-voltage capacitor exports.During voltage loss in not consideration system, the ceiling voltage that bank of super capacitors cascade system exports equals the half of the most high capacity voltage of high-voltage capacitor.Charging voltage grade needed for high-voltage capacitor determines the output voltage of every grade of bank of super capacitors, and high-voltage capacitor load voltage grade equals 2 times of the electric pressure that bank of super capacitors cascade system can superpose out.Secondly high-voltage capacitor is divided into groups, group forming criterion is inductance value according to the current-limiting inductance L that connects with the high-pressure side that ultracapacitor cascade system exports, the capacitance of high-voltage capacitor C, the charging interval often organizing high-voltage capacitor and ultracapacitor cascade system output current ability determine, often organizes the charging interval of high-voltage capacitor
bank of super capacitors maximum output current need be less than or equal to
wherein U is the bank of super capacitors voltage sums at different levels of devoting oneself to work when various combination, and L is the inductance value of current-limiting inductance of the high-pressure side series connection that described ultracapacitor cascade system exports, C is the capacity of high-voltage capacitor.
In ultracapacitor cascade system, often organize ultracapacitor according to parallel diode again after sense of current series connection control switch, form the one-level in ultracapacitor cascade system.Every one-level bank of super capacitors is connected in series and forms ultracapacitor cascade system.The high-pressure side series connection current-limiting inductance that ultracapacitor cascade system exports, current-limiting inductance exports all load control switch current input terminals of termination, load control switch current output terminal connects the high-pressure side of each group capacitor respectively, and each group capacitor low-pressure end all connects the low-pressure end of ultracapacitor cascade system, it is identical with ultracapacitor cascade system progression for the control signal terminal number amount controlling ultracapacitor cascade system that control system exports, and be connected to the drive end of the control switch of the every one-level of ultracapacitor cascade system respectively, the control end quantity for control load control switch of control system output is simultaneously identical with load capacitor packet count, and be connected to the control end of load control switch respectively, the high-tension measurement of control system terminates on the connecting line of current-limiting inductance and load control switch, to ensure the voltage can measured in whole charging process on all load capacitors, the current measurement coil of control system is enclosed within charge circuit.
For the ultracapacitor cascade high voltage device of 10kV, 5mF, control procedure of the present invention is described below.As shown in Figure 2, control method of the present invention based on ultracapacitor cascade high voltage device adopt 12 grades of series connection, wherein 9 grades of bank of super capacitors voltage 500V, other three grades of bank of super capacitors voltages are respectively 100V, 200V, 300V, bank of super capacitors maximum output current is 120A, in ultracapacitor cascade high voltage device, control switch adopts 1200V, 200A IGBT switch, and 1200V, 200A general-purpose diode selected by diode.Control system selects the Time-delayed trigger system on exportable 17 tunnels, and wherein 12 tunnels have the identical Time-delayed trigger time, and for opening and Closed control of IGBT switch in ultracapacitor cascade system, all the other 5 tunnels are used for the control of 5 groups of high-voltage capacitor load control switch.Current-limiting inductance selects 2.5H, 100A, turn-to-turn withstand voltage 15kV silicon steel plate core inductance; 5 load control switch SCR1, SCR2, SCR3, SCR4, SCR5 select 15kV, 500A Thyristors in series high-voltage switch gear, and high-voltage capacitor divides 5 groups, often organizes 1mF.Figure 3 shows that control switch IGBT control signal in the ultracapacitor cascade system that control system exports and bank of super capacitors output current, the control signal of 5 load control switch SCR1, SCR2, SCR3, SCR4, SCR5 and charging current.As wherein square wave is control signal, half-sinusoid is charging current signal, and charging current peak value is 100A.Suppose charging target voltage 10kV, then control system only controls 9 groups of 500V bank of super capacitors and 200V, 300V bank of super capacitors comes into operation.As shown in Figure 3, after 11 way control switch of ultracapacitor cascade system and the first load control switch SCR1 close, bank of super capacitors is that high-voltage capacitor C1 charges, after charging current reduces to 0,10 way switch and the first load control switch SCR1 of ultracapacitor cascade system disconnect, high-voltage capacitor C1 powers on and is pressed in the situation ignoring system loss and is issued to 10kV, and this charge cycle is 157ms.Wait for 3ms, after ensureing that the first load control switch SCR1 recovers cut-off state, 10 way control switch of ultracapacitor cascade system and the second load control switch SCR2, the 3rd load control switch SCR3, the 4th load control switch SCR4, the 5th load control switch SCR5 realize above-mentioned control procedure successively, after 780ms, on high-voltage capacitor, voltage all reaches 10kV, completes charging requirement.Because ultracapacitor cascade system exists loss in current-limiting inductance and control switch, therefore on final high-voltage capacitor, voltage is slightly smaller than 10kV, the indemnifying measure adopted suitably improves the voltage of ultracapacitor cascade system or the lower bank of super capacitors of many series connection several groups of voltage, determines whether to drop into according to charging voltage situation.If charging voltage target is 1.4kV, then each 1 group of control system control 500V, 200V bank of super capacitors comes into operation, and control system only exports above-mentioned 2 groups of bank of super capacitors switches and opens signal, and control procedure is charged identical with 10kV.
Voltage on high-voltage capacitor is differential equals differential 2 times of bank of super capacitors cascade system minimum voltage.In above-mentioned concrete enforcement, the voltage that ultracapacitor cascade system can superpose out is differential is 100V, therefore the differential 200V of the voltage on high-voltage capacitor, differential in order to reduce this, the cascade bank of super capacitors of 10V, 20V, 30V can be added in ultracapacitor cascade system, the voltage on high-voltage capacitor is differential can be reduced to 20V.
The present invention is mainly used in the fast charging and discharging field of high-power high voltage power supply, based on the performance of current bank of super capacitors, IGBT, diode component, thyristor series winding high-voltage switch gear, the demand can be met completely, apparatus of the present invention make serial connected super capacitor monomer ultracapacitor number reduce nearly half when having realized 10kV charging, effectively raise the reliability of charging system.
Claims (5)
1. the control method of a ultracapacitor cascade high voltage device, it is characterized in that, the principle of ceiling voltage half of highest goal voltage needed for high-voltage capacitor that described control method exports according to the bank of super capacitors cascade system in ultracapacitor cascade high voltage device, selects the bank of super capacitors quantity of bank of super capacitors cascade system participation work; Control selected bank of super capacitors output voltage, utilize resonance principle to make the voltage of capacitor reach the principle of 2 times of supply voltage when half harmonic period, high-voltage capacitor is charged.
2. according to the control method of ultracapacitor cascade high voltage device according to claim 1, it is characterized in that, the voltage on described high-voltage capacitor is differential equals differential 2 times of bank of super capacitors cascade system minimum voltage.
3. according to the control method of ultracapacitor cascade high voltage device according to claim 1, it is characterized in that, the maximum output current ability of bank of super capacitors is more than or equal to
in formula: U is the bank of super capacitors voltage sums at different levels of devoting oneself to work when various combination, L is the inductance value of the current-limiting inductance that the high-pressure side exported with ultracapacitor cascade system is connected, C is the capacity of high-voltage capacitor; When the output current of ultracapacitor is greater than the maximum output current ability of bank of super capacitors, adopt the control mode of load sequential charging.
4. according to the control method of ultracapacitor cascade high voltage device according to claim 1, it is characterized in that, after high-voltage capacitor target charging voltage is determined, control system selects the bank of super capacitors of devoting oneself to work according to the principle that bank of super capacitors output voltage sum equals target charging voltage half, then a load control switch in a control system control M load control switch closes, and control bank of super capacitors control switch at different levels in bank of super capacitors cascade system and close simultaneously, the voltage of this group high-voltage capacitor utilizing resonance principle to make to be connected with this load control switch reaches 2 times of bank of super capacitors cascade system output voltage when half harmonic period, half harmonic period moment, this load control switch disconnects, terminate to charge to this group high-voltage capacitor be connected with this load control switch, then control system control another load control switch close, and control bank of super capacitors cascade system output voltage, charge to this group high-voltage capacitor that load control switch connects therewith, so a point sequential grouping is charged to high-voltage capacitor.
5. according to the control method of ultracapacitor cascade high voltage device according to claim 1, it is characterized in that, the recharging DC source of described high-pressure installation is N number of bank of super capacitors.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03222016A (en) * | 1990-01-26 | 1991-10-01 | Nissin Electric Co Ltd | Control system for reactive power compensator |
| CN101013860A (en) * | 2006-12-21 | 2007-08-08 | 中国科学院电工研究所 | Charging equipment for high-voltage pulse capacitor |
-
2015
- 2015-05-15 CN CN201510247271.1A patent/CN104901360B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03222016A (en) * | 1990-01-26 | 1991-10-01 | Nissin Electric Co Ltd | Control system for reactive power compensator |
| CN101013860A (en) * | 2006-12-21 | 2007-08-08 | 中国科学院电工研究所 | Charging equipment for high-voltage pulse capacitor |
Non-Patent Citations (1)
| Title |
|---|
| 张东辉等: "高压电容器充电电源的研究", 《高电压技术》 * |
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