CN204230997U - A kind of power circuit based on capacitance energy storage - Google Patents
A kind of power circuit based on capacitance energy storage Download PDFInfo
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- CN204230997U CN204230997U CN201420721292.3U CN201420721292U CN204230997U CN 204230997 U CN204230997 U CN 204230997U CN 201420721292 U CN201420721292 U CN 201420721292U CN 204230997 U CN204230997 U CN 204230997U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000688 desorption electrospray ionisation Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- NHDHVHZZCFYRSB-UHFFFAOYSA-N pyriproxyfen Chemical compound C=1C=CC=NC=1OC(C)COC(C=C1)=CC=C1OC1=CC=CC=C1 NHDHVHZZCFYRSB-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a kind of power circuit based on capacitance energy storage, by accessing RC charge-discharge circuit on common AC/DC220V direct-current switch power supply basis, greatly reduce the cost of original AC/DC direct-current switch power supply, can meet when AC network power-off, for inverter provides direct current supply in short-term, meet the frequent workload demand of inverter when electrical network normally works simultaneously, and the demand of circuit breaker or contactor combined floodgate impact load can also be met, this circuit structure is simple, be easy to realize, meet high-power inverter control system workload demand, be easy to transplant for other similar DC load system and use, and cost declines to a great extent.
Description
Technical field
The utility model relates to a kind of power circuit, is specifically related to a kind of power circuit based on capacitance energy storage.
Background technology
Inverter control system needs factory to power, in-line power and direct current power taking three kinds of ways to take power.It is first-selected supply power mode that factory powers.The dead electricity if factory powers, should be able to automatically switch to in-line power, and according to power station owner's requirement, when electrical network externally fed or inverter self inversion exchange output power supply trouble, control system should be able to need direct current supply.Direct current supply has two kinds of situations, and one is low voltage crossing, needs the guarantee power supply of more than 3 seconds, and now inverter still needs to generate electricity by way of merging two or more grid systems, and another kind of situation is electric network fault, needs direct current supply, and ensure that monitoring needs, now inverter does not need to generate electricity by way of merging two or more grid systems.
Generally provide long-time direct current supply by uninterrupted power supply UPS or EPS, dependable performance but cost intensive.Short time powers and can adopt Switching Power Supply, and Large Copacity switch then needs customized, and cost is relatively high, and can not meet afterflow function in short-term.
The DC load of high-power inverter is mainly the impact load such as circuit breaker or contactor coil driving, high-power inverter (500kW) control system DC load is as follows: the contactor coil of AC is powered by auxiliary contactor supplementary AC under AC100-240V, so only need soft time but not power for a long time; DC100-220V, starting current <10A, average starting power 1000VA, average maintenance loss 17VA, this duration of load application is short, discharging current large, and short-time average power, up to 1000VA, is difficult to the AC/DC220V DC power supply finding specification like this.Above two kinds of major control burden requirement inverter power supplies meet the effective supply of 3s under low voltage crossing or failure condition, and Guarantee control system normally works.
Therefore need to provide a kind of cost performance higher and be easy to realize power circuit, with solve prior art exist above-mentioned topic.
Summary of the invention
For the deficiencies in the prior art, the utility model provides a kind of power circuit based on capacitance energy storage, comprise power pack, AC/DC power module and RC charge-discharge circuit, described power pack comprises factory and powers and inner power taking, described AC/DC power module input terminal connecting zero line L, phase line N, zero line L1 and phase line N1, described zero line L and phase line N is that factory is for electric connection terminal, described zero line L1 and phase line N1 is inner power taking terminals, at described zero line L, phase line N, zero line L1 and phase line N1 is connected to auxiliary contactor K, contactor coil K is parallel with between described zero line L and described phase line N, described AC/DC switched power output RC charge-discharge circuit in parallel, be composed in series with electric capacity C after described RC charge-discharge circuit is in parallel with diode D by resistance R, be connected to load-side by K switch 1.
Preferably, described AC/DC power module is the 220VAC/220VDC Switching Power Supply of 100W.
Preferably, described electric capacity C is the electrochemical capacitor of 12000uF/350V.
Preferably, described resistance value 5K/10W.
Preferably, the reverse withstand voltage 600V of described diode D, forward current 14A.
With immediate prior art ratio, the beneficial effects of the utility model are:
A kind of power circuit based on capacitance energy storage that the utility model provides, can meet when AC network power-off, what significantly reduce costs provides direct current supply in short-term for inverter, meet the frequent workload demand of inverter when electrical network normally works simultaneously, and the demand of circuit breaker or contactor combined floodgate impact load can also be met, circuit structure is simple, be easy to realize, meet high-power inverter control system workload demand, be easy to transplant for other similar DC load system and use, and cost declines to a great extent.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the power circuit schematic diagram of the utility model based on capacitance energy storage;
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
In order to thoroughly understand the utility model embodiment, by following description, detailed structure is proposed.Obviously, the execution of the utility model embodiment is not limited to the specific details that those skilled in the art has the knack of.Preferred embodiment of the present utility model is described in detail as follows, but except these are described in detail, the utility model can also have other execution modes.
With reference to the power circuit schematic diagram based on capacitance energy storage that Fig. 1, Fig. 1 provide for the utility model.The situation that load-side is contactor coil is given, an access in parallel discharge diode between load-side and K switch 1 in figure.There is shown the power circuit based on capacitance energy storage.This circuit comprises power pack, AC/DC power module and RC charge-discharge circuit, power pack comprises factory and powers and inner power taking two parts, described AC/DC power module input terminal connecting zero line L, phase line N, zero line L1 and phase line N1, zero line L and phase line N is that factory is for electric connection terminal, zero line L1 and phase line N1 is inner power taking terminals, zero line L, phase line N, zero line L1 and phase line N1 are connected to auxiliary contactor K, between zero line L and phase line N, are parallel with contactor coil K; At AC/DC switched power output RC charge-discharge circuit in parallel; Be composed in series with electric capacity C after RC charge-discharge circuit is in parallel with diode D by resistance R, be connected to load-side by K switch 1, a discharge diode D1 in parallel between K1 with load-side.
The power circuit based on capacitance energy storage in Fig. 1 adopts auxiliary relay to realize factory and powers and the switching of inner power taking, ensure that factory powers as first-selection, and can ensure that coil is held time to power on for 3 seconds due to electric capacity, therefore switches and can not have problems.Because regular tap power supply can not direct and associated large bulk capacitance, therefore have employed RC serial connection charge circuit arrangement.
Further, AC/DC power module adopts the 220VAC/220VDC Switching Power Supply of 100W.It is 17VA that control system contactor on average maintains loss, there is the situation being greater than 17VA in occasional, and power supply need fall appearance in high hypo area, 50W Switching Power Supply is selected effectively to satisfy the demands, AD/DC due to 220V is not conventional product, therefore select the 100W Switching Power Supply that soldier fills, price is relatively reasonable.
Further, the selection of electric capacity C need ensure startup and the 17VA loss maintenance of 3 seconds of contactor coil 10A/70ms.Actuating coil average loss 1000VA, time 70ms, namely average startup loss is 70J, consider that starting current is less than this requirement of 10A (electric current when 10A electric current is 100VDC startup, 220VDC can be less than this value when starting, but because producer is not to being provided volume data, also calculates by this value), according to starting resistor always for 220V considers, startup loss is 220V*10A*70ms=154J.In star t-up discharge process, DC terminal voltage there will be decline in various degree.As long as terminal voltage is greater than 100V after the guarantee range of decrease, starts loss and be less than 154J.Coil power supply scope is 100VDC-220VDC, capacitance energy storage Q=0.5CU*U, and electric capacity is energy storage Q=0.5*220*220*C=24200C when 220V, the capacitance energy storage Q=0.5*100*100*C=10000C when 100V.Electric capacity drops to 100V from 220V, release energy: 24200C-5000C=154J, extrapolate C=8020uF, consider the deviation of electric capacity 20% and suitably leave surplus, therefore select more than 10000uF electric capacity, consider according to the factor such as price and Lead Time, the final electrochemical capacitor selecting 12000uF/350V.Maintaining 3 seconds energy used is 17*3=51J, and this electric capacity is enough to meet the demands.
Further, resistance R is chosen for 5K/10W for best, during according to t=3RC, and charging 98% during electric capacity C charging 95%, t=4RC.Electric capacity C charge 95% time be just enough to starting contactor, due to charge 95% time electric capacity C voltage be 220*095=209V, now energy is 0.5*0.01*209*209=218J, and to have energy during 100V be 0.5*0.01*100*100=50J, therefore releasable energy is 218-50=168J, be greater than 154J, therefore charging 95% just energy starting contactor, the charging interval gets 3RC.Because inverter automatic start-up time is minimum is 3 minutes, control capacitance re-powers and automatically starts the grid-connected electricity time to inverter and be certainly greater than 3 minutes, usually much larger than 3 minutes, in normal operation, electric capacity meeting automatic charging after Contactor Starting, need not stand-by period charging again when next time starts.Calculated according to 3 minutes, 3RC=3*60, calculates R=6k.Because 5K resistance is commonly used, therefore select the resistor satisfied requirement of 5K.When resistance is 5K, when just having started to charge, power is maximum, and according to limiting case, electric capacity is completely not charged, and voltage is 0V.According to W=U*U/R=220*220/5000=9.68W, afterwards along with capacitor charging voltage raises, on resistance, voltage can be more and more less, and power also can be more and more less.When inverter normally runs, the starting voltage of contactor charging is greater than 100V, and loss is much smaller than 10W.According to the restriction that charging interval and resistance encapsulate, choose 5K/10W resistance comparatively reasonable.
Further, electric capacity C is sidelong electric diode D selection reverse withstand voltage 600V, forward current 14A is best.Electric capacity C electric discharge object is contactor, and the electric current of contactor consumption is less than 10A, and the time is less than 70ms.Calculate according to 10A, 70ms, more than forward current 10A selected by diode, the diode of TO220 encapsulation, the system discharge time is short, without the need to fin, and the DESI 12-06A of selected IXYS, reverse withstand voltage 600V, forward current 14A, cheap, meet instructions for use.
In addition, the selection of contactor coil electric discharge diode D1: select a commonly using and the diode be easily installed on contactor, IN4007 meets the demands, this diode forward electric current 1A, forward peak current 30A, can bear the half-sinusoid signal of the 8.3ms of peak value 30A, diode coil is less than 1ms discharge time, electric current is less than 10A, and IN4007 is conventional and easy for installation.
Adopt the above-mentioned power circuit based on capacitance energy storage, can meet when AC network power-off, what significantly reduce costs provides direct current supply in short-term for inverter, meet the frequent workload demand of inverter when electrical network normally works simultaneously, and can also meet the demand of circuit breaker or contactor combined floodgate impact load, circuit structure is simple, be easy to realize, meet high-power inverter control system workload demand, be easy to transplant use for other similar DC load system, and cost declines to a great extent.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; although with reference to above-described embodiment to invention has been detailed description; those of ordinary skill in the field still can modify to the specific embodiment of the present invention or equivalent replacement; these do not depart from any amendment of spirit and scope of the invention or equivalent replacement, are all applying within the claims awaited the reply.
Claims (5)
1., based on a power circuit for capacitance energy storage, comprise power pack, AC/DC power module and RC charge-discharge circuit, it is characterized in that:
Described power pack comprises factory and powers and inner power taking, described AC/DC power module input terminal connecting zero line L, phase line N, zero line L1 and phase line N1, described zero line L and phase line N is that factory is for electric connection terminal, described zero line L1 and phase line N1 is inner power taking terminals, described zero line L, phase line N, zero line L1 and phase line N1 are connected to auxiliary contactor K, between described zero line L and described phase line N, are parallel with contactor coil K;
Described AC/DC switched power output RC charge-discharge circuit in parallel;
Be composed in series with electric capacity C after described RC charge-discharge circuit is in parallel with diode D by resistance R, be connected to load-side by K switch 1.
2. the power circuit based on capacitance energy storage according to claim 1, is characterized in that, described AC/DC power module is the 220VAC/220VDC Switching Power Supply of 100W.
3. the power circuit based on capacitance energy storage according to claim 1, is characterized in that, described electric capacity C is the electrochemical capacitor of 12000uF/350V.
4. the power circuit based on capacitance energy storage according to claim 1, is characterized in that, described resistance value 5K/10W.
5. the power circuit based on capacitance energy storage according to claim 1, is characterized in that, the reverse withstand voltage 600V of described diode D, forward current 14A.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420721292.3U CN204230997U (en) | 2014-11-26 | 2014-11-26 | A kind of power circuit based on capacitance energy storage |
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| CN201420721292.3U CN204230997U (en) | 2014-11-26 | 2014-11-26 | A kind of power circuit based on capacitance energy storage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958813A (en) * | 2016-04-20 | 2016-09-21 | 江阴宏龙节能技术有限公司 | New energy saver |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958813A (en) * | 2016-04-20 | 2016-09-21 | 江阴宏龙节能技术有限公司 | New energy saver |
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Effective date of registration: 20170607 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: CHINA EPRI SCIENCE & TECHNOLOGY Co.,Ltd. Patentee after: State Grid Corporation of China Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: STATE GRID SMART GRID Research Institute Patentee before: State Grid Corporation of China Co-patentee before: CHINA EPRI SCIENCE & TECHNOLOGY Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 |