CN203813421U - Photovoltaic energy-storage inversion control integrated machine short-circuit and overload protecting circuit - Google Patents
Photovoltaic energy-storage inversion control integrated machine short-circuit and overload protecting circuit Download PDFInfo
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- CN203813421U CN203813421U CN201420011623.4U CN201420011623U CN203813421U CN 203813421 U CN203813421 U CN 203813421U CN 201420011623 U CN201420011623 U CN 201420011623U CN 203813421 U CN203813421 U CN 203813421U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 11
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The utility model discloses a photovoltaic energy-storage inversion control integrated machine short-circuit and overload protecting circuit. The protecting circuit mainly comprises a current Hall sensor, an adder, two comparators and two resistor voltage-dividing type reference voltage circuits. After the current Hall sensor converts measured output current signals into voltage signals through a resistor, a voltage signal Ub is acquired by means of the adder. The voltage signal Ub is simultaneously sent to the cathode input end of one comparator and the anode input end of the other comparator through a resistor. The two resistor voltage-dividing type reference voltage circuits supply a reference voltage to the two comparators respectively. The output ends of the two comparators are electrically connected with a master control one-chip microcomputer through a protecting signal. By means of the above-mentioned inversion output short-circuit protecting circuit, the short circuit and overload protecting currents of an inverter can be detected through the current Hall sensor. Current points can be protected to pass parameter settings. Generally, the current response time of the current Hall sensor is 200 ns. A rapid response to fault currents can be achieved.
Description
Technical field
The utility model relates to the contrary control of a kind of photovoltaic energy storage all-in-one, specifically the over load protective circuit of the contrary control of a kind of photovoltaic energy storage all-in-one.
Background technology
The load randomness connecting from net inverter output end is very large, often there will be the phenomenon of overload, even due to the damage of electrical equipment, and occurs short trouble, once if these faults occur protecting in time, inverter will likely damage.
It is CN1954470 that State Intellectual Property Office discloses publication number on April 25th, 2007, patent name is the patent of inverter bridge short-circuit protection scheme, inverter bridge short-circuit protection scheme has the three-phase multi-electrical level inverter bridge of three branch roads, each branch road provides the phase in three-phase output, be used for driving inductive load, described three-phase multi-electrical level inverter bridge has " L " individual bus voltage level (L >=3), two in a wherein said L level is minimum negative pole busbar voltage and maximum positive electrode bus voltage, the difference of any intermediate-bus voltage level and other bus voltage level is that the difference of described maximum positive electrode bus voltage and described minimum negative pole busbar voltage is again divided by (L-1), each branch road comprises two and half branch roads: the first half branch roads and the second half branch roads, described the first half branch roads comprise (L-1) individual described maximum positive electrode bus voltage and described switch between output mutually of being connected in series in, described the second half branch roads comprise (L-1) individual described minimum negative pole busbar voltage and described switch between output mutually of being connected in series in, each half branch road comprises: the outermost switch of described (L-1) individual switch, it is exactly the switch that is connected to described maximum positive electrode bus voltage or described minimum negative pole busbar voltage, the inner switch of described (L-1) individual switch, it is exactly to be connected to the described switch of output mutually, if and L > 3, (L-3) the individual intermediate switch that comprises described (L-1) individual switch, its be connected in series in described between inner switch and described outermost switch, wherein: described (L-1) the individual switch of each has mutual conductance, and it is configured to drive by control signal, the mutual conductance having with each outermost switch is lower than the mutual conductance of the described inner switch with half branch road, if and L > 3, each intermediate switch of half branch road has such mutual conductance: it is not more than the mutual conductance facing to the next inner switch of the described mutually series connection that output connects, and be not less than the mutual conductance of the next outer switch of the series connection that faces toward described minimum negative pole busbar voltage or described maximum positive electrode bus voltage connection.
There is the difference of essence in technique scheme and this patent.
Summary of the invention
The purpose of this utility model is to provide the over load protective circuit of the contrary control of a kind of photovoltaic energy storage all-in-one.
For achieving the above object, the technical scheme that the utility model adopts is:
The over load protective circuit of the contrary control of photovoltaic energy storage all-in-one, mainly by current Hall transducer, adder U2A, comparator U1A, comparator U1B, electric resistance partial pressure type reference voltage circuit A and electric resistance partial pressure type reference voltage circuit B form, current Hall transducer is converted to voltage signal Ua by the output current signal of the contrary control of the photovoltaic energy storage recording all-in-one by resistance R 11, voltage signal Ua obtains voltage signal Ub through adder, voltage signal Ub sends into the negative input of comparator U1A and the electrode input end of comparator U1B through resistance R 9 simultaneously, electric resistance partial pressure type reference voltage circuit A is electrically connected to the electrode input end of comparator U1A, for comparator U1A provides reference voltage Uc, another electric resistance partial pressure type reference voltage circuit is electrically connected to the negative input of comparator U1B, for comparator U1B provides reference voltage Ud, the output of the output of comparator U1A and comparator U1B is electrically connected to main control singlechip by a guard signal.
Described current Hall transducer is electrically connected to the input of the filter of the contrary control of photovoltaic energy storage all-in-one, and the current detecting time is shorter, can not have the delay time of filter.
Described electric resistance partial pressure type reference voltage circuit A consists of resistance R 1, resistance R 5 and capacitor C 1, one end of resistance R 1 is electrically connected to the electrode input end of comparator U1A with one end of resistance R 5 simultaneously, the voltage of the other end of resistance R 1 is circuit voltage VCC, the other end ground connection GND of resistance R 5, described capacitor C 1 is connected in parallel on the two ends of resistance R 5.
Described electric resistance partial pressure type reference voltage circuit B consists of resistance R 15, resistance R 16 and capacitor C 5, one end of resistance R 15 is electrically connected to the negative input of comparator U1B with one end of resistance R 16 simultaneously, the voltage of the other end of resistance R 15 is circuit voltage VCC, the other end ground connection GND of resistance R 16, described capacitor C 5 is connected in parallel on the two ends of resistance R 16.
Described voltage signal Ua obtains voltage signal Ub through adder, and the computing formula of Ub is: Ub=(3 ± Ua)/2.
The beneficial effects of the utility model: owing to adopting above-mentioned inversion output short circuit protection circuit; utilize current Hall transducer to detect the over load protective current of inverter; protective current point can arrange by parameter; the current response time of general current Hall transducer is 200ns; can respond fast fault current; close immediately inverter, prevent that inverter from damaging because of overcurrent.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is electrical schematic diagram of the present utility model.
In figure: 1, current Hall transducer; 2, adder U2A; 3, comparator U1A; 4, comparator U1B; 5, electric resistance partial pressure type reference voltage circuit A; 6, electric resistance partial pressure type reference voltage circuit B; 7, filter; 8, inverter.
Embodiment
As shown in Figure 1, the over load protective circuit of the contrary control of photovoltaic energy storage all-in-one, mainly by current Hall transducer 1, adder U2A2, comparator U1A3, comparator U1B4, electric resistance partial pressure type reference voltage circuit A5 and electric resistance partial pressure type reference voltage circuit B6 form, current Hall transducer is converted to voltage signal Ua by the output current signal of the contrary control of the photovoltaic energy storage recording all-in-one by resistance R 11, voltage signal Ua obtains voltage signal Ub through adder, voltage signal Ub sends into the negative input of comparator U1A and the electrode input end of comparator U1B through resistance R 9 simultaneously, electric resistance partial pressure type reference voltage circuit A is electrically connected to the electrode input end of comparator U1A, for comparator U1A provides reference voltage Uc, another electric resistance partial pressure type reference voltage circuit is electrically connected to the negative input of comparator U1B, for comparator U1B provides reference voltage Ud, the output of the output of comparator U1A and comparator U1B is electrically connected to main control singlechip by a guard signal.
Described current Hall transducer 1 is electrically connected to the input of the filter 7 of the contrary control of photovoltaic energy storage all-in-one, and the current detecting time is shorter, can not have the delay time of filter.
Described electric resistance partial pressure type reference voltage circuit A5 consists of resistance R 1, resistance R 5 and capacitor C 1, one end of resistance R 1 is electrically connected to the electrode input end of comparator U1A with one end of resistance R 5 simultaneously, the voltage of the other end of resistance R 1 is circuit voltage VCC, the other end ground connection GND of resistance R 5, described capacitor C 1 is connected in parallel on the two ends of resistance R 5.
Described electric resistance partial pressure type reference voltage circuit B6 consists of resistance R 15, resistance R 16 and capacitor C 5, one end of resistance R 15 is electrically connected to the negative input of comparator U1B with one end of resistance R 16 simultaneously, the voltage of the other end of resistance R 15 is circuit voltage VCC, the other end ground connection GND of resistance R 16, described capacitor C 5 is connected in parallel on the two ends of resistance R 16.
Technical solution adopted in the utility model is as follows:
If output current is Iout, the no-load voltage ratio of current Hall transducer is X:1.
After current Hall sensor sample, obtain the sampled value AC_Current=Iout/X of electric current,
Ua=Iout*R11/X, passes through adder operation circuit Ub=(3 ± Ua)/2=1.5 ± Iout*R11/2X.
Reference voltage Uc and Ud are respectively: Uc=R5*VCC/(R1+R5); Ud=R16*VCC/(R15+R16).
The voltage that under normal condition, OC is ordered is high level, Ub and Uc, Ud comparison, when Ub > Uc or Ub < Ud, the voltage that OC is ordered drags down as low level, after once OC being detected and being low level, main control singlechip is closed inverter 8 immediately, prevents that inverter from damaging because of overcurrent.Until after load faulty recovery normally, normally operation.
The above is preferred implementation of the present utility model; certainly can not limit with this interest field of the utility model; should be understood that; for those skilled in the art; the technical solution of the utility model is modified or is equal to replacement, do not depart from the protection range of technical solutions of the utility model.
Claims (1)
1. a photovoltaic energy storage is against the over load protective circuit of controlling all-in-one, it is characterized in that: mainly by current Hall transducer, adder U2A, comparator U1A, comparator U1B, electric resistance partial pressure type reference voltage circuit A and electric resistance partial pressure type reference voltage circuit B form, current Hall transducer is converted to voltage signal Ua by the output current signal of the contrary control of the photovoltaic energy storage recording all-in-one by resistance R 11, voltage signal Ua obtains voltage signal Ub through adder, voltage signal Ub sends into the negative input of comparator U1A and the electrode input end of comparator U1B through resistance R 9 simultaneously, electric resistance partial pressure type reference voltage circuit A is electrically connected to the electrode input end of comparator U1A, for comparator U1A provides reference voltage Uc, another electric resistance partial pressure type reference voltage circuit is electrically connected to the negative input of comparator U1B, for comparator U1B provides reference voltage Ud, the output of the output of comparator U1A and comparator U1B is electrically connected to main control singlechip by a guard signal.
2. the over load protective circuit of the contrary control of photovoltaic energy storage according to claim 1 all-in-one, is characterized in that: described current Hall transducer is electrically connected to the input of the filter of the contrary control of photovoltaic energy storage all-in-one.
3. photovoltaic energy storage according to claim 1 and 2 is against the over load protective circuit of control all-in-one; it is characterized in that: described electric resistance partial pressure type reference voltage circuit A consists of resistance R 1, resistance R 5 and capacitor C 1; one end of resistance R 1 is electrically connected to the electrode input end of comparator U1A with one end of resistance R 5 simultaneously; the voltage of the other end of resistance R 1 is circuit voltage VCC; the other end ground connection GND of resistance R 5, described capacitor C 1 is connected in parallel on the two ends of resistance R 5.
4. photovoltaic energy storage according to claim 1 and 2 is against the over load protective circuit of control all-in-one; it is characterized in that: described electric resistance partial pressure type reference voltage circuit B consists of resistance R 15, resistance R 16 and capacitor C 5; one end of resistance R 15 is electrically connected to the negative input of comparator U1B with one end of resistance R 16 simultaneously; the voltage of the other end of resistance R 15 is circuit voltage VCC; the other end ground connection GND of resistance R 16, described capacitor C 5 is connected in parallel on the two ends of resistance R 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420011623.4U CN203813421U (en) | 2014-01-09 | 2014-01-09 | Photovoltaic energy-storage inversion control integrated machine short-circuit and overload protecting circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420011623.4U CN203813421U (en) | 2014-01-09 | 2014-01-09 | Photovoltaic energy-storage inversion control integrated machine short-circuit and overload protecting circuit |
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| CN203813421U true CN203813421U (en) | 2014-09-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715662A (en) * | 2014-01-09 | 2014-04-09 | 惠州天能源科技有限公司 | Short circuit and overload protection circuit of photovoltaic energy storage inverse control all-in-one machine |
| CN109239514A (en) * | 2018-08-03 | 2019-01-18 | 重庆川仪自动化股份有限公司 | A kind of liquidometer short circuit sensor, open detection circuit |
| CN109449886A (en) * | 2018-11-23 | 2019-03-08 | 深圳古瑞瓦特新能源股份有限公司 | Photovoltaic inverter control method and system |
| CN114597867A (en) * | 2022-04-01 | 2022-06-07 | 杭州利沃得电源有限公司 | Overcurrent protection device and three-phase inverter |
-
2014
- 2014-01-09 CN CN201420011623.4U patent/CN203813421U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715662A (en) * | 2014-01-09 | 2014-04-09 | 惠州天能源科技有限公司 | Short circuit and overload protection circuit of photovoltaic energy storage inverse control all-in-one machine |
| CN109239514A (en) * | 2018-08-03 | 2019-01-18 | 重庆川仪自动化股份有限公司 | A kind of liquidometer short circuit sensor, open detection circuit |
| CN109239514B (en) * | 2018-08-03 | 2021-02-09 | 重庆川仪自动化股份有限公司 | Short circuit and open circuit detection circuit of liquid level meter sensor |
| CN109449886A (en) * | 2018-11-23 | 2019-03-08 | 深圳古瑞瓦特新能源股份有限公司 | Photovoltaic inverter control method and system |
| CN109449886B (en) * | 2018-11-23 | 2024-02-23 | 深圳古瑞瓦特新能源有限公司 | Photovoltaic inverter control method and system |
| CN114597867A (en) * | 2022-04-01 | 2022-06-07 | 杭州利沃得电源有限公司 | Overcurrent protection device and three-phase inverter |
| CN114597867B (en) * | 2022-04-01 | 2023-12-08 | 杭州利沃得电源有限公司 | Overcurrent protection device and three-phase inverter |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: TIANBAO ELECTRONIC (HUIZHOU) CO., LTD. Effective date: 20150518 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150518 Address after: 516005 Dongjiang Industrial Zone, Shuikou subdistrict, Huicheng District, Guangdong, Huizhou Patentee after: HUIZHOU TEN SOURCES SOLAR ELECTRICITY Ltd. Address before: 516005 Dongjiang Industrial Zone, Shuikou subdistrict, Huicheng District, Guangdong, Huizhou Patentee before: HUIZHOU TEN SOURCES SOLAR ELECTRICITY Ltd. Patentee before: TEN PAO ELECTRONICS (HUIZHOU) Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20140903 |
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| CX01 | Expiry of patent term |