CN203104323U - Direct current-to-alternative current (DC-to-AC) power conversion system - Google Patents
Direct current-to-alternative current (DC-to-AC) power conversion system Download PDFInfo
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- CN203104323U CN203104323U CN 201320070661 CN201320070661U CN203104323U CN 203104323 U CN203104323 U CN 203104323U CN 201320070661 CN201320070661 CN 201320070661 CN 201320070661 U CN201320070661 U CN 201320070661U CN 203104323 U CN203104323 U CN 203104323U
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Abstract
The utility model provides a direct current-to-alternative current (DC-to-AC) power conversion system. The DC-to-AC power conversion system comprises an AC voltage sampling module, an AC current sampling module, an AC electric energy detecting unit, a power conversion controller, a DC conversion circuit and an inversion circuit, wherein the AC voltage sampling module is used for collecting AC voltage values of an electric grid; the AC current sampling module is used for collecting AC current values of the electric grid; the AC electric energy detecting unit is connected with the AC voltage sampling module and the AC current sampling module and used for detecting single-phase or multi-phase AC voltage, AC current, a zero crossing point, active power, reactive power, apparent power, a power factor and/or electric energy; the power conversion controller generates a power conversion control signal according to an AC electric energy detection result; the DC conversion circuit is connected with the power conversion controller; and the inversion circuit is connected with the power conversion controller and the electric grid respectively and connected with the DC conversion circuit through a DC bus. The DC-to-AC power conversion system can be used for performing complete detection on single-phase or multiphase AC voltage and AC current, a zero crossing point, active power, reactive power, apparent power, a power factor, electric energy and the like, and relates to detection on different electric energy quality parameters.
Description
Technical field
The utility model relates to the current conversion technical field, and specifically, the utility model relates to a kind of direct current to the electric power coversion system that exchanges.
Background technology
Combining inverter exchanges to detect and adopts microprocessor (MCU) to detect alternating voltage usually at present, uses software Phase-Lock to follow the tracks of line voltage fast, carries out the locking of frequency and phase place.Fig. 1 is the internal module figure of an ac voltage detection circuit 102 of the prior art.Wherein, the voltage between sample circuit 106 measurement electrical network (L1～L3 is a live wire, and N is a zero line) each utmost point of alternating current, transfer data to microprocessor 108, microprocessor 108 sends device 112 with producing data flow after the data processing to by light lotus root 110, to use.In addition, power circuit 104 is converted to power supply to microprocessor 108 with grid alternating current.
Generally calculate the finite value that obtains voltage, the control that mean value is used for power conversions in the prior art by MCU or master controller.But can there be the computing complexity in these calculating, the shortcoming that resource requirement is high.In addition, prior art only detects voltage usually, and does not have the detection of alternating current, does not so just have direct detected interchange active power, reactive power, apparent power etc.Thereby can not monitor these performances of inverter, the control that can not be correlated with is such as power adjustments, reactive power compensation, power factor adjusting etc.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of direct current to the electric power coversion system that exchanges, and can realize the complete detection of single-phase or heterogeneous alternating voltage, alternating current, zero crossing, active power, reactive power, apparent power, power factor, electric energy etc.
In order to solve the problems of the technologies described above, the utility model provides a kind of direct current to the electric power coversion system that exchanges, and comprising:
The alternating voltage sampling module is connected with electrical network, is used to gather the ac voltage of described electrical network;
The alternating current sampling module is connected with electrical network, is used to gather the alternating current flow valuve of described electrical network;
The AC energy detecting unit, its input pin is connected with described alternating current sampling module with described alternating voltage sampling module respectively, is used to detect single-phase or heterogeneous alternating voltage, alternating current, zero crossing, active power, reactive power, apparent power, power factor and/or electric energy;
The power conversions controller is connected with the output pin of described AC energy detecting unit, is used for producing according to the AC energy testing result control signal of power conversions;
DC converting circuit is connected with described power conversions controller, is used for regulating direct current conversion work state according to described control signal;
Inverter circuit is connected with electrical network with described power conversions controller respectively, and is connected with described DC converting circuit by a direct current bus, is used for regulating direct current to the inversion operating state that exchanges according to described control signal.
Alternatively, described direct current also comprises to the electric power coversion system that exchanges:
The DC bus-bar voltage sample circuit is connected with described dc bus with described AC energy detecting unit respectively, is used to detect the magnitude of voltage of described dc bus and sends to described AC energy detecting unit.
Alternatively, described power conversions controller comprises:
The direct current switching controller is connected with described DC converting circuit with described AC energy detecting unit respectively, is used for controlling according to described AC energy testing result the direct current conversion work state of described DC converting circuit;
Inverter controller; be connected with described inverter circuit with described AC energy detecting unit respectively; the direct current that is used for controlling described inverter circuit according to described AC energy testing result is realized the conversion and control and the protection control of AC side to the inversion operating state that exchanges.
Alternatively, described direct current also comprises to the electric power coversion system that exchanges:
Communication module, the monitoring system with a described AC energy detecting unit and an outside is connected respectively, is used to obtain the data of described AC energy testing result, by the wired or wireless communication mode it is transferred to described monitoring system, monitors.
Alternatively, described AC energy detecting unit is the electric energy detection chip, comprises ADI ADE series, the logic of reaching the clouds CS series, U.S. letter, Shanghai Belling, huge spring photoelectricity or the little electric energy detection class chip of sharp energy.
Compared with prior art, the utlity model has following advantage:
The utility model can improve the accuracy of detection of combining inverter electrical network, improves the power conversions performance and the protective value of inverter.
The utility model can improve the function that combining inverter detects; realize the complete detection of single-phase and heterogeneous alternating voltage, alternating current, zero crossing, active power, reactive power, apparent power, power factor, electric energy etc., the detection that realizes the various qualities of power supply is to be used for every defencive function.The utility model also can improve the relevant controlled function of combining inverter, realizes functions such as active power adjusting, reactive power adjusting, power factor adjusting.
The utility model has been simplified the circuit design and the programming of combining inverter, reduces cost, and improves reliability and efficient.
Description of drawings
The above and other feature of the present utility model, character and advantage will become more obvious by the description below in conjunction with drawings and Examples, wherein:
Fig. 1 is the internal module figure of an ac voltage detection circuit of the prior art;
Fig. 2 is the modular structure schematic diagram of the direct current of an embodiment in the utility model to the electric power coversion system that exchanges;
Fig. 3 is the modular structure schematic diagram of the direct current of another embodiment in the utility model to the electric power coversion system that exchanges;
Fig. 4 is the modular structure schematic diagram of the direct current of another embodiment in the utility model to the electric power coversion system that exchanges.
Embodiment
The utility model is described in further detail below in conjunction with specific embodiments and the drawings; set forth more details in the following description so that fully understand the utility model; but the utility model obviously can be implemented with the multiple alternate manner that is different from this description; those skilled in the art can do similar popularization, deduction according to practical situations under the situation of the utility model intension, therefore should be with the content constraints of this specific embodiment protection range of the present utility model.
Fig. 2 is the modular structure schematic diagram of the direct current of an embodiment in the utility model to the electric power coversion system that exchanges.It should be noted that this and follow-up other accompanying drawing all only as example, it is not to be to draw according to the condition of equal proportion, and should not be construed as limiting as the protection range to the actual requirement of the utility model with this.As shown in Figure 2, this direct current mainly comprises AC energy detecting unit 201, alternating voltage sampling module 202, alternating current sampling module 203, power conversions controller 205, DC converting circuit 210 and inverter circuit 211 etc. to the electric power coversion system that exchanges.Wherein, alternating voltage sampling module 202 is connected with electrical network 204, is used to gather the ac voltage of electrical network 204; Alternating current sampling module 203 is connected with electrical network 204, is used to gather the alternating current flow valuve of electrical network 204.The input pin of AC energy detecting unit 201 is connected with alternating current sampling module 203 with alternating voltage sampling module 202 respectively, is used to realize the complete detection of single-phase or heterogeneous alternating voltage, alternating current, zero crossing, active power, reactive power, apparent power, power factor and/or electric energy etc.Power conversions controller 205 is connected with the output pin of AC energy detecting unit 201, is used for producing the control signal of power conversions to DC converting circuit 210 and inverter circuit 211 according to the AC energy testing result.DC converting circuit 210 is connected with power conversions controller 205, is used for regulating direct current conversion work state according to control signal.Inverter circuit 211 is connected with electrical network 204 with power conversions controller 205 respectively, and is connected with DC converting circuit 210 by a direct current bus 209, is used for regulating direct current to the inversion operating state that exchanges according to control signal.
Fig. 3 is the modular structure schematic diagram of the direct current of another embodiment in the utility model to the electric power coversion system that exchanges.As shown in Figure 3, this direct current also comprises a direct current busbar voltage sample circuit 308 to the electric power coversion system that exchanges on the basis of electric power coversion system shown in Figure 2, it is connected with dc bus 209 with AC energy detecting unit 201 respectively, is used to detect the magnitude of voltage of dc bus 209 and sends to AC energy detecting unit 201.
Fig. 4 is the modular structure schematic diagram of the direct current of another embodiment in the utility model to the electric power coversion system that exchanges.As shown in Figure 4, this direct current is subdivided into direct current switching controller 416 and inverter controller 418 with this power conversions controller 205 to the electric power coversion system that exchanges on the basis of electric power coversion system shown in Figure 3.Wherein, direct current switching controller 416 is connected with DC converting circuit 210 with AC energy detecting unit 201 respectively, is used for the direct current conversion work state according to AC energy testing result control DC converting circuit 210.Inverter controller 418 is connected with inverter circuit 211 with AC energy detecting unit 201 respectively, is used for arriving the inversion operating state that exchanges according to the direct current of AC energy testing result control inverter circuit 211, and the conversion and control and the protection of realization AC side are controlled.
In the various embodiments described above of the present utility model, this AC energy detecting unit 201 is the electric energy detection chip, can be multiple model, such as available ADI (Ya De promise semiconductor) ADE series, Cirrus Logic (logic of reaching the clouds) CS series; The electric energy detection class chip that Maxim (U.S. letter), Shanghai Belling, huge spring photoelectricity or sharp energy are little etc.
In addition, in above-mentioned Fig. 2, Fig. 3 and embodiment shown in Figure 4, this direct current can also comprise a communication module 213 to the electric power coversion system that exchanges, it is connected with the monitoring system of AC energy detecting unit 201 with an outside respectively, be used to obtain the data of AC energy testing result, by the wired or wireless communication mode it is transferred to monitoring system, monitors.
In the various embodiments described above of the present utility model, AC energy detecting unit 201 can be exported provides active power, reactive power, apparent power, power factor, reach electric current and voltage effective value, is transferred to communication module 213, is used to exchange performance monitoring.
AC energy detecting unit 201 can be exported instantaneous overcurrent, instantaneous overvoltage, peak value and electric voltage dropping detection signal, is transferred to power conversions controller 205, is used for exchanging protection control.
AC energy detecting unit 201 can detect and the output AC voltage zero crossing, is transferred to power conversions controller 205, can be used for the inverter power conversion and control, realizes the synchronous tracking to electrical network 204.
AC energy detecting unit 201 can detect instantaneous value, effective value, mean value and the peak value of alternating voltage, is transferred to power conversions controller 205, is used for the inverter power conversion and control.
AC energy detecting unit 201 can detect reactive power and power factor, is transferred to power conversions controller 205, is used for the inversion conversion and control, carries out the generation and the absorption of reactive power, realizes reactive power compensation.
AC energy detecting unit 201 detects by instantaneous overcurrent, can detect the unusual short circuit of full bridge inverter, turn-offs the full-bridge switch pipe at once, realizes protection.When the interchange transient current exceeded limit value, AC energy detecting unit 201 sent signal and gives power conversions controller 205, sent signal and turn-offed inverter circuit 211, realized protecting.
AC energy detecting unit 201 detects by instantaneous overvoltage, can detect the higher unusually of full bridge inverter input voltage, turn-offs direct current change over switch pipe at once, realizes protection.For example shown in Figure 3, DC converting circuit 210 is connected by dc bus 209 with inverter circuit 211.DC bus-bar voltage sample circuit 308 detects the voltage of dc bus 209, and sends to AC energy detecting unit 201.When this voltage exceeded limit value, AC energy detecting unit 201 sent signal and gives power conversions controller 205, sent signal and turn-offed DC converting circuit 210, realized protection.
Compared with prior art, the utility model can have the following advantages:
The utility model can improve the accuracy of detection of combining inverter electrical network, improves the power conversions performance and the protective value of inverter.
The utility model can improve the function that combining inverter detects; realize the complete detection of single-phase and heterogeneous alternating voltage, alternating current, zero crossing, active power, reactive power, apparent power, power factor, electric energy etc., the detection that realizes the various qualities of power supply is to be used for every defencive function.The utility model also can improve the relevant controlled function of combining inverter, realizes functions such as active power adjusting, reactive power adjusting, power factor adjusting.
The utility model has been simplified the circuit design and the programming of combining inverter, reduces cost, and improves reliability and efficient.
Though the utility model with preferred embodiment openly as above, it is not to be used for limiting the utility model, and any those skilled in the art can make possible change and modification in not breaking away from spirit and scope of the present utility model.Therefore, every content that does not break away from technical solutions of the utility model, all falls within the protection range that the utility model claim defined any modification, equivalent variations and modification that above embodiment did according to technical spirit of the present utility model.
Claims (5)
1. a direct current is characterized in that to the electric power coversion system that exchanges, and comprising:
Alternating voltage sampling module (202) is connected with electrical network (204), gathers the ac voltage of described electrical network (204);
Alternating current sampling module (203) is connected with electrical network (204), gathers the alternating current flow valuve of described electrical network (204);
AC energy detecting unit (201), its input pin is connected with described alternating current sampling module (203) with described alternating voltage sampling module (202) respectively, detects single-phase or heterogeneous alternating voltage, alternating current, zero crossing, active power, reactive power, apparent power, power factor and/or electric energy;
Power conversions controller (205) is connected with the output pin of described AC energy detecting unit (201), produces the control signal of power conversions according to the AC energy testing result;
DC converting circuit (210) is connected with described power conversions controller (205), regulates direct current conversion work state according to described control signal;
Inverter circuit (211), be connected with electrical network (204) with described power conversions controller (205) respectively, and be connected with described DC converting circuit (210) by a direct current bus (209), regulate direct current to the inversion operating state that exchanges according to described control signal.
2. direct current according to claim 1 is characterized in that to the electric power coversion system that exchanges, also comprises:
DC bus-bar voltage sample circuit (308) is connected with described dc bus (209) with described AC energy detecting unit (201) respectively, detects the magnitude of voltage of described dc bus (209) and sends to described AC energy detecting unit (201).
3. direct current according to claim 2 is characterized in that to the electric power coversion system that exchanges described power conversions controller (205) comprising:
Direct current switching controller (416) is connected with described DC converting circuit (210) with described AC energy detecting unit (201) respectively, controls the direct current conversion work state of described DC converting circuit (210) according to described AC energy testing result;
Inverter controller (418); be connected with described inverter circuit (211) with described AC energy detecting unit (201) respectively; the direct current of controlling described inverter circuit (211) according to described AC energy testing result is realized the conversion and control and the protection control of AC side to the inversion operating state that exchanges.
4. according to the electric power coversion system of each described direct current in the claim 1 to 3, it is characterized in that, also comprise to interchange:
Communication module (213), the monitoring system with a described AC energy detecting unit (201) and an outside is connected respectively, obtains the data of described AC energy testing result, by the wired or wireless communication mode it is transferred to described monitoring system, monitors.
5. direct current according to claim 4 is to the electric power coversion system that exchanges, it is characterized in that, described AC energy detecting unit (201) is the electric energy detection chip, comprises ADI ADE series, the logic of reaching the clouds CS series, U.S. letter, Shanghai Belling, huge spring photoelectricity or the little electric energy detection class chip of sharp energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320070661 CN203104323U (en) | 2013-02-07 | 2013-02-07 | Direct current-to-alternative current (DC-to-AC) power conversion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320070661 CN203104323U (en) | 2013-02-07 | 2013-02-07 | Direct current-to-alternative current (DC-to-AC) power conversion system |
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| Publication Number | Publication Date |
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| CN203104323U true CN203104323U (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320070661 Expired - Lifetime CN203104323U (en) | 2013-02-07 | 2013-02-07 | Direct current-to-alternative current (DC-to-AC) power conversion system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095162A (en) * | 2013-02-07 | 2013-05-08 | 浙江昱能光伏科技集成有限公司 | Power conversion system from direct current to alternating current |
| CN112098705A (en) * | 2020-09-17 | 2020-12-18 | 株洲中车时代电气股份有限公司 | System and method for rapidly identifying AC/DC power supply system |
-
2013
- 2013-02-07 CN CN 201320070661 patent/CN203104323U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095162A (en) * | 2013-02-07 | 2013-05-08 | 浙江昱能光伏科技集成有限公司 | Power conversion system from direct current to alternating current |
| CN112098705A (en) * | 2020-09-17 | 2020-12-18 | 株洲中车时代电气股份有限公司 | System and method for rapidly identifying AC/DC power supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG YUNENG TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ALTENERGY POWER SYSTEM INC. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 314050 Jiaxing, South Lake District, Zhejiang, Asia Pacific Road, No. 1 Patentee after: Zhejiang Yuneng Technology Co.,Ltd. Address before: 314050 Jiaxing, South Lake District, Zhejiang, Asia Pacific Road, No. 1 Patentee before: ALTENERGY POWER SYSTEM, Inc. |
|
| CP03 | Change of name, title or address |
Address after: 3 / F, building 1, No. 1, Asia Pacific Road (Jiaxing Science and technology city), Nanhu District, Jiaxing City, Zhejiang Province Patentee after: Yuneng Technology Co.,Ltd. Address before: 314050 No. 1 Asia Pacific Road, Nanhu District, Zhejiang, Jiaxing Patentee before: Zhejiang Yuneng Technology Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |
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| CX01 | Expiry of patent term |