CN102510088B - Automatic direct current inverter tracking grid connection device - Google Patents
Automatic direct current inverter tracking grid connection device Download PDFInfo
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- CN102510088B CN102510088B CN201110374877.3A CN201110374877A CN102510088B CN 102510088 B CN102510088 B CN 102510088B CN 201110374877 A CN201110374877 A CN 201110374877A CN 102510088 B CN102510088 B CN 102510088B
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- controllable silicon
- trigger circuit
- synchronous trigger
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- power supply
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Abstract
The invention relates to an automatic direct current inverter tracking grid connection device comprising a synchronous trigger circuit U1, a capacitor C0 and an inverter bridge circuit which consists of controlled silicon K1, K2, K3 and K4; and both ends of the inverter bridge circuit are connected with a power supply E and an inductor L1. The joints between the controlled silicon K1 and K2 and between the controlled silicon K3 and K4 form two alternating current input ends. The joint between the controlled silicon K2 and K3 is connected with the positive pole of a direct current power supply, and the joint between K1 and K4 is connected with the negative pole of the direct current power supply. A resistor R1 for adjusting phase is connected on the periphery of the synchronous trigger circuit U1. The synchronous trigger circuit U1 is provided with nine pins which are connected with the capacitor C0 as well as the controlled silicon K1, K2, K3 and K4. The capacitor C0 can effectively control the power problem when the internet is surfed, and ensure the normal work of the inverter grid connection device; the inductor L1 can effectively reduce the peak pulse current when the internet is surfed, so that the internet surfing current is close to a sine wave; and the resistor R1 is used for adjusting the phase of the synchronous trigger circuit.
Description
Technical field
The present invention relates to electron electric power technical field, particularly relate to a kind of automatic direct current inverter tracking grid connection device.
Background technology
The grid-connected lexical or textual analysis in power industry is that the transmission line of generating set and power transmission network are connected (starting outwards to transmit electricity).As generating electricity by way of merging two or more grid systems of new unit alleviates the deficiency of supply of electric power.
Combining inverter is generally divided into photovoltaic combining inverter, wind power-generating grid-connected inverter, power-equipment combining inverter and other generating equipment combining inverters.Under the condition that battery tension is stable, the sine-wave current of inverter stable output.
Inversion Internet device popular on the market at present, the following problem of ubiquity: 1, efficiency is lower, and volume is larger; 2, complex structure; 3, poor reliability; 4, price is too high.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of automatic direct current inverter tracking grid connection device, volume is little, price is low, effectively can reduce production and use cost, and reliability is high.
In order to achieve the above object, the technical solution used in the present invention is: a kind of automatic direct current inverter tracking grid connection device, the inverter bridge circuit that described device comprises synchronous trigger circuit U1, electric capacity C0 and is made up of controllable silicon K1, K2, K3, K4, be connected with power supply E and the inductance L 1 of series connection at the two ends of inverter bridge, be connected with the resistance R1 for control phase in the periphery of synchronous trigger circuit U1.
Controllable silicon K1 and the K2 of inverter bridge circuit, the junction of K3 and K4 form two ac input ends, connect the positive pole of DC power supply, negative pole that the junction of K1 and K4 connects DC power supply in the junction of controllable silicon K2 and K3.
Synchronous trigger circuit U1 has and electric capacity C0 and controllable silicon K1, K2, K3, 9 pins that K4 connects, the pin 2 of synchronous trigger circuit U1 is extremely connected with the control of controllable silicon K1, the pin 7 of synchronous trigger circuit U1 is extremely connected with the control of controllable silicon K2, the pin 5 of synchronous trigger circuit U1 is extremely connected with the control of controllable silicon K3, the pin 3 of synchronous trigger circuit U1 is extremely connected with the control of controllable silicon K4, the pin 4 of synchronous trigger circuit U1, 6 are connected with two ac input ends of rectifier bridge respectively, be connected with ac input end after the pin 9 series capacitance C0 of synchronous trigger circuit U1, the pin 1 of synchronous trigger circuit U1 is connected with the negative pole of DC output end, 4 pin of synchronous trigger circuit U1 are connected for inner with 8 pin.
Described controllable silicon K1, K2, K3, K4 are one-way SCR or bidirectional triode thyristor.
During K2, K4 conducting, DC power supply E forms discharge loop by L1, K2, C0, Vi, K4, E successively; During K1, K3 conducting, DC power supply E forms discharge loop by L1, K3, Vi, C0, K1, E.
Compared with prior art, the invention has the beneficial effects as follows: utilize electric capacity C0 and four controllable silicon, and coordinate synchronous trigger circuit to form direct current from motion tracking inversion gird connecting device, the simple volume of this apparatus structure is little, effective reduction is produced and use cost, and reliability is high.
Accompanying drawing explanation
Fig. 1 is circuit theory schematic diagram of the present invention;
fig. 2 is synchronous trigger circuit principle schematic of the present invention.
Embodiment
Purport of the present invention is to overcome the deficiencies in the prior art, provides a kind of automatic direct current inverter tracking grid connection device, utilizes electric capacity C0 and four controllable silicon, and coordinates synchronous trigger circuit to form direct current from motion tracking inversion gird connecting device.
Controllable silicon is thyristor again, is the abbreviation of thyratron transistor, is commonly called as controllable silicon, and it is a kind of high power switch type semiconductor device.Controllable silicon has the characteristic of silicon rectification device, can work, and its course of work can control, be widely used in the electronic circuits such as controlled rectification, AC voltage adjusting, contactless electronic beam switch, inversion and frequency conversion under high voltage, big current condition.
Be described in detail, to be interpretated more in-depth technical characteristic of the present invention and advantage with reference to accompanying drawing below in conjunction with embodiment.
As shown in Figure 1, 2, a kind of automatic direct current inverter tracking grid connection device, the inverter bridge circuit that described device comprises synchronous trigger circuit U1, electric capacity C0 and is made up of controllable silicon K1, K2, K3, K4, be connected with power supply E and the inductance L 1 of series connection at the two ends of inverter bridge, be also connected with the resistance R1 for control phase in the periphery of synchronous trigger circuit U1.
Controllable silicon K1 and the K2 of inverter bridge circuit, the junction of K3 and K4 form two ac input ends, connect the positive pole of DC power supply, negative pole that the junction of K1 and K4 connects DC power supply in the junction of controllable silicon K2 and K3.
Synchronous trigger circuit U1 is provided with 9 pins be connected with electric capacity C0 and controllable silicon K1, K2, K3, K4, and the pin 2 of synchronous trigger circuit U1 is extremely connected with the control of controllable silicon K1; Pin 7 is extremely connected with the control of controllable silicon K2; Pin 5 is extremely connected with the control of controllable silicon K3; Pin 3 is extremely connected with the control of controllable silicon K4; Pin 4,6 is connected with two ac input ends of inverter bridge respectively; Be connected with ac input end after pin 9 series capacitance C0; Pin 1 is connected with the negative pole of DC power supply; 4 pin are connected with 8 pin inside.
Described controllable silicon K1, K2, K3, K4 are one-way SCR or bidirectional triode thyristor.
During K2, K4 conducting, DC power supply E forms discharge loop by L1, K2, C0, Vi, K4, E successively; During K1, K3 conducting, DC power supply E forms discharge loop by L1, K3, Vi, C0, K1, E.
The problem of watt level when electric capacity C0 can effectively control to surf the Net, ensures that inversion gird connecting device normally works; Pulse peak current when inductance L 1 effectively can reduce online, makes online electric current close to sinusoidal wave; The phase place adjustment of resistance R1 synchronous trigger circuit.
Operation principle of the present invention is as follows: when inverter connects DC power supply E, K2, K1 and K3, K4 all add voltage E, then respectively there is 1/2E at K1, K2, K3, K4 two ends, as external AC Vi, voltage between K1, K2, K3, K4 can change with the change of outer alternating current Vi, when the voltage at K2 or K4 two ends is reverse, namely the control pole of voltage≤0V, K1, K3 obtains synchronizing signal from synchronous trigger circuit and conducting.In like manner: when the voltage at K1, K3 two ends is reverse, namely the control pole of voltage≤0V, K2, K4 obtains synchronizing signal from synchronous trigger circuit and conducting.
During K2, K4 conducting, DC power supply E forms discharge loop (online) by L1, K2, C0, Vi, K4, E.In like manner: during K1, K3 conducting, DC power supply E forms discharge loop (online) by L1, K3, Vi, C0, K1, E.
Simultaneously controllable silicon K1, K2, K3, K4 as shown in Figure 1 can change bidirectional triode thyristor into, by adjusting the phase angle of synchronous trigger circuit, realizes online, rectification exports dual-purpose.
The content mentioned in above-described embodiment is not limitation of the invention, and under the prerequisite not departing from inventive concept of the present invention, any apparent replacement is all within protection scope of the present invention.
Claims (4)
1. an automatic direct current inverter tracking grid connection device, it is characterized in that: the inverter bridge circuit that described device comprises synchronous trigger circuit U1, electric capacity C0 and is made up of controllable silicon K1, K2, K3, K4, be connected with DC power supply E and the inductance L 1 of series connection at the two ends of inverter bridge circuit, be connected with the resistance R1 for control phase in the periphery of synchronous trigger circuit U1;
During controllable silicon K2, K4 conducting, DC power supply E forms discharge loop by inductance L 1, controllable silicon K2, electric capacity C0, external AC Vi, controllable silicon K4, DC power supply E successively; During controllable silicon K1, K3 conducting, DC power supply E forms discharge loop by inductance L 1, controllable silicon K3, external AC Vi, electric capacity C0, controllable silicon K1, DC power supply E.
2. automatic direct current inverter tracking grid connection device according to claim 1, it is characterized in that: controllable silicon K1 and the K2 of described inverter bridge circuit, the junction of K3 and K4 form two ac input ends, the junction meeting the positive pole of DC power supply E, controllable silicon K1 and controllable silicon K4 in the junction of controllable silicon K2 and K3 connects the negative pole of DC power supply E.
3. automatic direct current inverter tracking grid connection device according to claim 2, it is characterized in that: described synchronous trigger circuit U1 is provided with and electric capacity C0 and controllable silicon K1, K2, K3, 9 pins that K4 connects, the pin 2 of synchronous trigger circuit U1 is extremely connected with the control of controllable silicon K1, the pin 7 of synchronous trigger circuit U1 is extremely connected with the control of controllable silicon K2, the pin 5 of synchronous trigger circuit U1 is extremely connected with the control of controllable silicon K3, the pin 3 of synchronous trigger circuit U1 is extremely connected with the control of controllable silicon K4, the pin 4 of synchronous trigger circuit U1, 6 are connected with two ac input ends of inverter bridge respectively, be connected with pin 6 after the pin 9 series capacitance C0 of synchronous trigger circuit U1, the pin 1 of synchronous trigger circuit U1 is connected with the negative pole of DC power supply E, 4 pin of synchronous trigger circuit U1 are connected for inner with 8 pin.
4. the automatic direct current inverter tracking grid connection device according to any one of claims 1 to 3, is characterized in that: described controllable silicon K1, K2, K3, K4 are one-way SCR or bidirectional triode thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110374877.3A CN102510088B (en) | 2011-11-23 | 2011-11-23 | Automatic direct current inverter tracking grid connection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110374877.3A CN102510088B (en) | 2011-11-23 | 2011-11-23 | Automatic direct current inverter tracking grid connection device |
Publications (2)
| Publication Number | Publication Date |
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| CN102510088A CN102510088A (en) | 2012-06-20 |
| CN102510088B true CN102510088B (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110374877.3A Expired - Fee Related CN102510088B (en) | 2011-11-23 | 2011-11-23 | Automatic direct current inverter tracking grid connection device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2247894Y (en) * | 1995-07-04 | 1997-02-19 | 杨希良 | Controlled silicon reverse frequency changing device |
| CN2657281Y (en) * | 2003-10-08 | 2004-11-17 | 朱兴发 | Single-phase bridge parallel inverter for medium frequency power supply |
| EP2341606A1 (en) * | 2009-10-30 | 2011-07-06 | Sanyo Electric Co., Ltd. | Grid interconnection inverter and grid interconnection device |
| CN202333837U (en) * | 2011-11-23 | 2012-07-11 | 东莞市神牛电子科技有限公司 | Automatic tracking synchronization device of direct current inversion |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976965B (en) * | 2010-10-08 | 2013-04-03 | 江苏博纬新能源科技有限公司 | Direct-current tracing control high-power photovoltaic grid-connected inverter |
-
2011
- 2011-11-23 CN CN201110374877.3A patent/CN102510088B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2247894Y (en) * | 1995-07-04 | 1997-02-19 | 杨希良 | Controlled silicon reverse frequency changing device |
| CN2657281Y (en) * | 2003-10-08 | 2004-11-17 | 朱兴发 | Single-phase bridge parallel inverter for medium frequency power supply |
| EP2341606A1 (en) * | 2009-10-30 | 2011-07-06 | Sanyo Electric Co., Ltd. | Grid interconnection inverter and grid interconnection device |
| CN202333837U (en) * | 2011-11-23 | 2012-07-11 | 东莞市神牛电子科技有限公司 | Automatic tracking synchronization device of direct current inversion |
Non-Patent Citations (2)
| Title |
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| 基于TCA785和FPGA的触发器设计;解仑等;《电子技术应用》;20080531;第34卷(第5期);第65-68页 * |
| 晶闸管有源逆变探析;郭焕银;《宿州师专学报》;20010331;第16卷(第1期);第33-35页 * |
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Effective date of registration: 20151111 Address after: 523000 Guangdong Province, Dongguan city Wangniudun the village Wang Ying Road Patentee after: Chen Guoying Address before: 523000 Guangdong city of Dongguan Province Wang Dongguan City Industrial Zone, the Niu Dun cow Electronic Technology Co. Ltd. Patentee before: Dongguan Shenniu Electronics Technology Co., Ltd. |
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