CN103095162A - Power conversion system from direct current to alternating current - Google Patents
Power conversion system from direct current to alternating current Download PDFInfo
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- CN103095162A CN103095162A CN2013100486636A CN201310048663A CN103095162A CN 103095162 A CN103095162 A CN 103095162A CN 2013100486636 A CN2013100486636 A CN 2013100486636A CN 201310048663 A CN201310048663 A CN 201310048663A CN 103095162 A CN103095162 A CN 103095162A
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Abstract
The invention provides a power conversion system from direct current to alternating current. The power conversion system from direct current to alternating current comprises an alternating voltage sampling module, an alternating current sampling module, an alternating electric energy detecting unit, a power conversion controller, a direct current conversion circuit and an inverter circuit. The alternating voltage sampling module collects an alternating voltage value of a power grid. The alternating current sampling module collects an alternating current value of the power gird. The alternating electric energy detecting unit is connected with the alternating voltage sampling module and the alternating current sampling module and detects single-phase or multi-phase alternating voltage, alternating current, zero cursing point, active power, reactive power, apparent power, power factor and/or electric energy. The power conversion controller produces a control signal of power conversion according to an alternating electric energy detection result. The direct current conversion circuit is connected with the electric power controller. The inverter circuit is connected with the electric power conversion controller and the power grid and is connected with the direct current conversion circuit through a direct current busbar. The power conversion system from direct current to alternating current is capable of achieving complete detection of single-phase or multi-phase alternating voltage, alternating current, zero cursing point, active power, reactive power, apparent power, power factor and/or electric energy. The invention relates to the detection of various power quality parameters.
Description
Technical field
The present invention relates to the current conversion technical field, specifically, the present invention relates to a kind of direct current to the electric power coversion system that exchanges.
Background technology
Combining inverter exchanges to detect and usually adopts microprocessor (MCU) to detect alternating voltage at present, uses software Phase-Lock to follow the tracks of fast line voltage, 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 live wire, and N is zero line) each utmost points of alternating current, transfer data to microprocessor 108, microprocessor 108 produces data flow after data are processed, and sends device 112 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.
General finite value by MCU or master controller calculating acquisition voltage, the control that mean value is used for the electric power conversion in prior art.But these calculating can exist computing complicated, the shortcoming that resource requirement is high.In addition, prior art only detects voltage usually, and there is no the detection of alternating current, so just there is no interchange active power that direct-detection arrives, 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 regulation etc.
Summary of the invention
Technical problem to be solved by this invention is to provide 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 invention provides a kind of direct current to the electric power coversion system that exchanges, comprising:
The alternating voltage sampling module is connected with electrical network, is used for gathering the ac voltage of described electrical network;
The alternating current sampling module is connected with electrical network, is used for gathering 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, for detection of single-phase or heterogeneous alternating voltage, alternating current, zero crossing, active power, reactive power, apparent power, power factor and/or electric energy;
The electric power switching 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 electric power conversion;
DC converting circuit is connected with described electric power switching controller, is used for regulating direct current conversion work state according to described control signal;
Inverter circuit is connected with electrical network with described electric power switching 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:
DC-bus voltage sampling circuit is connected with described dc bus with described AC energy detecting unit respectively, for detection of the magnitude of voltage of described dc bus and send to described AC energy detecting unit.
Alternatively, described electric power switching 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; be used for arriving according to the direct current of the described inverter circuit of described AC energy testing result control the inversion operating state that exchanges, realize conversion and control and the protection control of AC.
Alternatively, described direct current also comprises to the electric power coversion system that exchanges:
Communication module, the monitoring system with described AC energy detecting unit and an outside is connected respectively, is used for obtaining 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 present invention has the following advantages:
The present invention can improve the accuracy of detection of combining inverter electrical network, improves electric power conversion performance and the protective value of inverter.
The present invention 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., realize that the detection of the various qualities of power supply is to be used for every defencive function.The present invention also can improve the relevant control function of combining inverter, realizes the functions such as active power regulation, reactive power adjusting, power factor regulation.
The present invention has simplified circuit design and the programming of combining inverter, reduces costs, and improves reliability and efficient.
Description of drawings
The above and other features of the present invention, 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 that the direct current of an embodiment in the present invention is to the modular structure schematic diagram of the electric power coversion system that exchanges;
Fig. 3 is that the direct current of another embodiment in the present invention is to the modular structure schematic diagram of the electric power coversion system that exchanges;
Fig. 4 is that the direct current of another embodiment in the present invention is to the modular structure schematic diagram of the electric power coversion system that exchanges.
Embodiment
The invention will be further described below in conjunction with specific embodiments and the drawings; set forth in the following description more details so that fully understand the present invention; but the present invention obviously can implement with the multiple alternate manner that is different from this description; those skilled in the art can be in the situation that do similar popularization, deduction without prejudice to intension of the present invention according to practical situations, therefore should be with content constraints protection scope of the present invention of this specific embodiment.
Fig. 2 is that the direct current of an embodiment in the present invention is to the modular structure schematic diagram of 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 actual requirement of the present invention 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, electric power switching 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 for gathering the ac voltage of electrical network 204; Alternating current sampling module 203 is connected with electrical network 204, is used for gathering 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 for realizing 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.Electric power switching controller 205 is connected with the output pin of AC energy detecting unit 201, is used for producing the control signal of electric power conversion to DC converting circuit 210 and inverter circuit 211 according to the AC energy testing result.DC converting circuit 210 is connected with electric power switching 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 electric power switching 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 that the direct current of another embodiment in the present invention is to the modular structure schematic diagram of the electric power coversion system that exchanges.As shown in Figure 3, this direct current also comprises a DC-bus voltage sampling 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, for detection of the magnitude of voltage of dc bus 209 and send to AC energy detecting unit 201.
Fig. 4 is that the direct current of another embodiment in the present invention is to the modular structure schematic diagram of 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 electric power switching 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 controlling according to the AC energy testing result direct current conversion work state of DC converting circuit 210.Inverter controller 418 is connected with inverter circuit 211 with AC energy detecting unit 201 respectively, is used for arriving according to the direct current of AC energy testing result control inverter circuit 211 the inversion operating state that exchanges, and realizes conversion and control and the protection control of AC.
In the various embodiments described above of the present invention, this AC energy detecting unit 201 is the electric energy detection chip, can be Multiple Type, 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 for obtaining 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 invention, 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 for exchanging performance monitoring.
AC energy detecting unit 201 can be exported instantaneous overcurrent, instantaneous overvoltage, peak value and voltage and fall detection signal, is transferred to electric power switching controller 205, is used for harmonics and controls.
AC energy detecting unit 201 can detect and the output AC voltage zero crossing, is transferred to electric power switching 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 electric power switching 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 electric power switching controller 205, is used for the inversion conversion and control, carries out generation and the absorption of reactive power, realizes reactive power compensation.
AC energy detecting unit 201 detects by instantaneous overcurrent, the abnormal short circuit of full bridge inverter can be detected, 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 to electric power switching controller 205, and transmitted signal is turn-offed inverter circuit 211, realized protection.
AC energy detecting unit 201 detects by instantaneous overvoltage, can detect the extremely higher 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 with inverter circuit by dc bus 209 connections.DC-bus voltage sampling 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 to electric power switching controller 205, and transmitted signal is turn-offed DC converting circuit 210, realized protection.
Compared with prior art, the present invention can have the following advantages:
The present invention can improve the accuracy of detection of combining inverter electrical network, improves electric power conversion performance and the protective value of inverter.
The present invention 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., realize that the detection of the various qualities of power supply is to be used for every defencive function.The present invention also can improve the relevant control function of combining inverter, realizes the functions such as active power regulation, reactive power adjusting, power factor regulation.
The present invention has simplified circuit design and the programming of combining inverter, reduces costs, and improves reliability and efficient.
Although the present invention with preferred embodiment openly as above, it is not to limit the present invention, and any those skilled in the art can make possible change and modification without departing from the spirit and scope of the present invention.Therefore, every content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any modification, equivalent variations and modification that above embodiment does, within all falling into the protection range that claim of the present invention defines.
Claims (5)
1. a direct current to the electric power coversion system that exchanges, comprising:
Alternating voltage sampling module (202) is connected with electrical network (204), is used for gathering the ac voltage of described electrical network (204);
Alternating current sampling module (203) is connected with electrical network (204), is used for gathering 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, for detection of single-phase or heterogeneous alternating voltage, alternating current, zero crossing, active power, reactive power, apparent power, power factor and/or electric energy;
Electric power switching controller (205) is connected with the output pin of described AC energy detecting unit (201), is used for producing according to the AC energy testing result control signal of electric power conversion;
DC converting circuit (210) is connected with described electric power switching controller (205), is used for regulating direct current conversion work state according to described control signal;
Inverter circuit (211), be connected with electrical network (204) with described electric power switching controller (205) respectively, and be connected with described DC converting circuit (210) by a direct current bus (209), be used for regulating direct current to the inversion operating state that exchanges according to described control signal.
2. direct current according to claim 1 to the electric power coversion system that exchanges, is characterized in that, also comprises:
DC-bus voltage sampling circuit (308), be connected with described dc bus (209) with described AC energy detecting unit (201) respectively, for detection of the magnitude of voltage of described dc bus (209) and send to described AC energy detecting unit (201).
3. direct current according to claim 2 to the electric power coversion system that exchanges, is characterized in that, described electric power switching controller (205) comprising:
Direct current switching controller (416), be connected with described DC converting circuit (210) with described AC energy detecting unit (201) respectively, be used for controlling according to described AC energy testing result the direct current conversion work state of described DC converting circuit (210);
Inverter controller (418); be connected with described inverter circuit (211) with described AC energy detecting unit (201) respectively; be used for arriving according to the direct current of the described AC energy testing result described inverter circuit of control (211) the inversion operating state that exchanges, realize conversion and control and the protection control of AC.
4. according to claim 1 to 3, the described direct current of any one to the electric power coversion system that exchanges, is characterized in that, also comprises:
Communication module (213), monitoring system with described AC energy detecting unit (201) and an outside is connected respectively, be used for obtaining the data of described AC energy testing result, by the wired or wireless communication mode, it be transferred to described monitoring system, monitor.
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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100486636A CN103095162A (en) | 2013-02-07 | 2013-02-07 | Power conversion system from direct current to alternating current |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100486636A CN103095162A (en) | 2013-02-07 | 2013-02-07 | Power conversion system from direct current to alternating current |
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| CN103095162A true CN103095162A (en) | 2013-05-08 |
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| CN2013100486636A Pending CN103095162A (en) | 2013-02-07 | 2013-02-07 | Power conversion system from direct current to alternating current |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634539A (en) * | 2017-10-17 | 2018-01-26 | 中国地质大学（武汉） | A kind of combining inverter |
| CN112977120A (en) * | 2019-12-02 | 2021-06-18 | 北京新能源汽车股份有限公司 | Discharging device and discharging method |
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| US20100085787A1 (en) * | 2008-10-03 | 2010-04-08 | Ajit Wasant Kane | System and method for powering a hybrid electric vehicle |
| CN101847876A (en) * | 2010-05-28 | 2010-09-29 | 上海理工大学 | Three-phase photovoltaic grid connected inverter system |
| CN202260487U (en) * | 2011-09-13 | 2012-05-30 | 辽宁力迅风电控制系统有限公司 | Control device for single-phase photovoltaic grid-connected power generation system |
| CN203104323U (en) * | 2013-02-07 | 2013-07-31 | 浙江昱能光伏科技集成有限公司 | Direct current-to-alternative current (DC-to-AC) power conversion system |
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2013
- 2013-02-07 CN CN2013100486636A patent/CN103095162A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100085787A1 (en) * | 2008-10-03 | 2010-04-08 | Ajit Wasant Kane | System and method for powering a hybrid electric vehicle |
| CN101847876A (en) * | 2010-05-28 | 2010-09-29 | 上海理工大学 | Three-phase photovoltaic grid connected inverter system |
| CN202260487U (en) * | 2011-09-13 | 2012-05-30 | 辽宁力迅风电控制系统有限公司 | Control device for single-phase photovoltaic grid-connected power generation system |
| CN203104323U (en) * | 2013-02-07 | 2013-07-31 | 浙江昱能光伏科技集成有限公司 | Direct current-to-alternative current (DC-to-AC) power conversion system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634539A (en) * | 2017-10-17 | 2018-01-26 | 中国地质大学（武汉） | A kind of combining inverter |
| CN112977120A (en) * | 2019-12-02 | 2021-06-18 | 北京新能源汽车股份有限公司 | Discharging device and discharging method |
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Address after: 314050 Jiaxing, South Lake District, Zhejiang, Asia Pacific Road, No. 1 Applicant after: Zhejiang Yuneng Technology Co., Ltd. Address before: 314050 Jiaxing, South Lake District, Zhejiang, Asia Pacific Road, No. 1 Applicant before: Altenergy Power System Inc. |
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Free format text: CORRECT: APPLICANT; FROM: ALTENERGY POWER SYSTEM INC. TO: ZHEJIANG YUNENG TECHNOLOGY CO., LTD. |
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Application publication date: 20130508 |