CN204578398U - Solar energy inverter circuit - Google Patents
Solar energy inverter circuit Download PDFInfo
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- CN204578398U CN204578398U CN201520279018.XU CN201520279018U CN204578398U CN 204578398 U CN204578398 U CN 204578398U CN 201520279018 U CN201520279018 U CN 201520279018U CN 204578398 U CN204578398 U CN 204578398U
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- 238000010248 power generation Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
本实用新型公开了一种太阳能逆变电路，涉及光伏发电领域。为解决传统逆变器一般存在着整体效率不够高、母线电压不稳定等缺点的问题而发明。本实用新型实施例公开的技术方案包括：第一直流输入端子、第二直流输入端子、第一直流滤波器、第二直流滤波器、三相全桥IGBT逆变器、LCL滤波器、交流滤波器和交流输出端子；第一直流输入端子的一端与第一直流滤波器的一端相连；第二直流输入端子的一端与第二直流滤波器的一端相连；第一直流输入端子的另一端和第二直流输入端子的另一端分别与三相全桥IGBT逆变器的一端相连；三相全桥IGBT逆变器的另一端与LCL滤波器的一端相连；LCL滤波器的另一端与交流滤波器的一端相连；交流滤波器的另一端与交流输出端子相连。
The utility model discloses a solar inverter circuit, which relates to the field of photovoltaic power generation. It was invented to solve the shortcomings of traditional inverters such as insufficient overall efficiency and unstable bus voltage. The technical solution disclosed in the embodiment of the utility model includes: a first DC input terminal, a second DC input terminal, a first DC filter, a second DC filter, a three-phase full-bridge IGBT inverter, an LCL filter, AC filter and AC output terminal; one end of the first DC input terminal is connected to one end of the first DC filter; one end of the second DC input terminal is connected to one end of the second DC filter; the first DC input terminal The other end of the second DC input terminal and the other end of the second DC input terminal are respectively connected to one end of the three-phase full-bridge IGBT inverter; the other end of the three-phase full-bridge IGBT inverter is connected to one end of the LCL filter; the other end of the LCL filter One end is connected to one end of the AC filter; the other end of the AC filter is connected to the AC output terminal.
Description
技术领域technical field
本实用新型涉及光伏发电领域，尤其涉及一种太阳能逆变电路。The utility model relates to the field of photovoltaic power generation, in particular to a solar inverter circuit.
背景技术Background technique
逆变器是光伏电池组件与交流电网连接的桥梁，是光伏发电系统的核心部分，其效率的高低、可靠性的好坏将直接影响整个光伏发电系统的性能。传统逆变器一般存在着整体效率不够高、母线电压不稳定等缺点。The inverter is the bridge connecting the photovoltaic cell module and the AC power grid, and is the core part of the photovoltaic power generation system. Its efficiency and reliability will directly affect the performance of the entire photovoltaic power generation system. Traditional inverters generally have shortcomings such as insufficient overall efficiency and unstable bus voltage.
实用新型内容Utility model content
本实用新型提供一种太阳能逆变电路，能够提供一种工作效率高、母线电压稳定的逆变电路。The utility model provides a solar inverter circuit, which can provide an inverter circuit with high working efficiency and stable bus voltage.
本实用新型解决技术问题采用如下技术方案：一种太阳能逆变电路，包括：The utility model adopts the following technical solutions to solve the technical problems: a solar inverter circuit, comprising:
第一直流输入端子、第二直流输入端子、第一直流滤波器、第二直流滤波器、三相全桥IGBT逆变器、LCL滤波器、交流滤波器和交流输出端子；a first DC input terminal, a second DC input terminal, a first DC filter, a second DC filter, a three-phase full-bridge IGBT inverter, an LCL filter, an AC filter and an AC output terminal;
所述第一直流输入端子的一端与所述第一直流滤波器的一端相连；所述第二直流输入端子的一端与所述第二直流滤波器的一端相连；所述第一直流滤波器的另一端和所述第二直流滤波器的另一端分别与所述三相全桥IGBT逆变器的一端相连；所述三相全桥IGBT逆变器的另一端与所述LCL滤波器的一端相连；所述LCL滤波器的另一端与所述交流滤波器的一端相连；所述交流滤波器的另一端与所述交流输出端子相连。One end of the first DC input terminal is connected to one end of the first DC filter; one end of the second DC input terminal is connected to one end of the second DC filter; the first DC The other end of the filter and the other end of the second DC filter are respectively connected to one end of the three-phase full-bridge IGBT inverter; the other end of the three-phase full-bridge IGBT inverter is connected to the LCL filter One end of the filter is connected; the other end of the LCL filter is connected to one end of the AC filter; the other end of the AC filter is connected to the AC output terminal.
可选的，本实用新型实施例提供的太阳能逆变电路，还包括：Optionally, the solar inverter circuit provided by the embodiment of the utility model also includes:
交流防雷器，所述交流防雷器的一端连接在所述交流滤波器和所述交流输出端子之间，另一端接地。An AC lightning protector, one end of the AC lightning protector is connected between the AC filter and the AC output terminal, and the other end is grounded.
可选的，本实用新型实施例提供的太阳能逆变电路，还包括：Optionally, the solar inverter circuit provided by the embodiment of the utility model also includes:
第一直流断路器，所述第一直流断路器连接在所述第一直流输入端子和所述第一直流滤波器之间；和/或a first DC circuit breaker connected between the first DC input terminal and the first DC filter; and/or
第二直流断路器，所述第二直流断路器连接在所述第二直流输入端子和所述第二直流滤波器之间。A second DC circuit breaker, the second DC circuit breaker is connected between the second DC input terminal and the second DC filter.
可选的，本实用新型实施例提供的太阳能逆变电路，还包括：Optionally, the solar inverter circuit provided by the embodiment of the utility model also includes:
交流断路器，所述交流断路器连接在所述交流滤波器和所述交流输出端子之间。An AC circuit breaker, the AC circuit breaker is connected between the AC filter and the AC output terminal.
可选的，本实用新型实施例提供的太阳能逆变电路，还包括：Optionally, the solar inverter circuit provided by the embodiment of the utility model also includes:
交流接触器，所述交流接触器连接在所述LCL滤波器和所述交流滤波器之间。An AC contactor, the AC contactor is connected between the LCL filter and the AC filter.
可选的，本实用新型实施例提供的太阳能逆变电路中，所述第一直流滤波器和/或第二直流滤波器为直流电磁兼容性滤波器。Optionally, in the solar inverter circuit provided by the embodiment of the present invention, the first DC filter and/or the second DC filter is a DC electromagnetic compatibility filter.
可选的，本实用新型实施例提供的太阳能逆变电路中，所述交流滤波器为交流电磁兼容性滤波器。Optionally, in the solar inverter circuit provided by the embodiment of the present utility model, the AC filter is an AC electromagnetic compatibility filter.
本实用新型具有如下有益效果：直流输入端子输入的直流电，经直流滤波器滤波后，通过三相全桥IGBT逆变器将滤波后的直流电变换为高频的三相交流电；该三相交流电经LCL滤波器滤波后，经交流滤波器滤波输出。本实用新型实施例提供的技术方案可以使用最大功率点跟踪MPPT方式进行控制，从而提高逆变器的工作效率，解决了现有技术中传统逆变器一般存在着整体效率不够高、母线电压不稳定等缺点的问题。The utility model has the following beneficial effects: the direct current input by the direct current input terminal is filtered by a direct current filter, and the filtered direct current is converted into a high-frequency three-phase alternating current through a three-phase full-bridge IGBT inverter; the three-phase alternating current is passed through After being filtered by the LCL filter, the output is filtered by the AC filter. The technical solution provided by the embodiment of the utility model can use the maximum power point tracking MPPT method to control, thereby improving the working efficiency of the inverter, and solving the problems of the traditional inverter in the prior art that the overall efficiency is not high enough and the bus voltage is not high. Stability and other shortcomings.
附图说明Description of drawings
图1为本实用新型实施例1提供的太阳能逆变电路的结构示意图一；Fig. 1 is a structural schematic diagram 1 of a solar inverter circuit provided by Embodiment 1 of the present utility model;
图2为本实用新型实施例1提供的太阳能逆变电路的结构示意图二；Fig. 2 is the structural schematic diagram 2 of the solar inverter circuit provided by the utility model embodiment 1;
图3为本实用新型实施例1提供的太阳能逆变电路的结构示意图三；Fig. 3 is a structural schematic diagram three of the solar inverter circuit provided by Embodiment 1 of the utility model;
图4为本实用新型实施例1提供的太阳能逆变电路的结构示意图四；Fig. 4 is a structural schematic diagram 4 of the solar inverter circuit provided by Embodiment 1 of the utility model;
图5为本实用新型实施例1提供的太阳能逆变电路的结构示意图五。FIG. 5 is a fifth schematic structural diagram of the solar inverter circuit provided by Embodiment 1 of the present utility model.
具体实施方式Detailed ways
下面结合实施例及附图对本实用新型的技术方案作进一步阐述。Below in conjunction with embodiment and accompanying drawing, the technical solution of the utility model is further elaborated.
实施例1Example 1
如图1所示，本实用新型实施例提供一种太阳能逆变电路，包括：As shown in Figure 1, an embodiment of the present invention provides a solar inverter circuit, including:
第一直流输入端子101、第二直流输入端子102、第一直流滤波器103、第二直流滤波器104、三相全桥IGBT逆变器105、LCL滤波器106、交流滤波器107和交流输出端子108。其中，所述第一直流输入端子的一端与所述第一直流滤波器的一端相连；所述第二直流输入端子的一端与所述第二直流滤波器的一端相连；所述第一直流滤波器的另一端和所述第二直流滤波器的另一端分别与所述三相全桥IGBT逆变器的一端相连；所述三相全桥IGBT逆变器的另一端与所述LCL滤波器的一端相连；所述LCL滤波器的另一端与所述交流滤波器的一端相连；所述交流滤波器的另一端与所述交流输出端子相连。The first DC input terminal 101, the second DC input terminal 102, the first DC filter 103, the second DC filter 104, the three-phase full-bridge IGBT inverter 105, the LCL filter 106, the AC filter 107 and AC output terminal 108. Wherein, one end of the first DC input terminal is connected to one end of the first DC filter; one end of the second DC input terminal is connected to one end of the second DC filter; the first The other end of the DC filter and the other end of the second DC filter are respectively connected to one end of the three-phase full-bridge IGBT inverter; the other end of the three-phase full-bridge IGBT inverter is connected to the One end of the LCL filter is connected; the other end of the LCL filter is connected to one end of the AC filter; the other end of the AC filter is connected to the AC output terminal.
进一步的，为了实现防雷保护，如图2所示，本实施例提供的太阳能逆变电路，还包括：交流防雷器109，所述交流防雷器的一端连接在所述交流滤波器和所述交流输出端子之间，另一端接地。Further, in order to realize lightning protection, as shown in Figure 2, the solar inverter circuit provided by this embodiment also includes: an AC lightning protector 109, one end of which is connected to the AC filter and Between the AC output terminals, the other end is grounded.
进一步的，为了防止用户在安装逆变器时触电，如图3所示，本实施例提供的太阳能逆变电路，还包括：第一直流断路器110，所述第一直流断路器连接在所述第一直流输入端子和所述第一直流滤波器之间；和/或第二直流断路器111，所述第二直流断路器连接在所述第二直流输入端子和所述第二直流滤波器之间。Further, in order to prevent users from getting an electric shock when installing the inverter, as shown in FIG. 3 , the solar inverter circuit provided in this embodiment further includes: a first DC circuit breaker 110 connected to Between the first DC input terminal and the first DC filter; and/or a second DC circuit breaker 111, the second DC circuit breaker is connected between the second DC input terminal and the between the second DC filter.
进一步的，为了防止用户在安装逆变器时触电，如图4所示，本实施例提供的太阳能逆变电路，还包括：交流断路器112，所述交流断路器连接在所述交流滤波器和所述交流输出端子之间。Further, in order to prevent the user from getting an electric shock when installing the inverter, as shown in Figure 4, the solar inverter circuit provided by this embodiment also includes: an AC circuit breaker 112 connected to the AC filter and between the AC output terminals.
进一步的，为了实现过载保护，如图5所示，本实施例提供的太阳能逆变电路，还包括：交流接触器113，所述交流接触器连接在所述LCL滤波器和所述交流滤波器之间。Further, in order to realize overload protection, as shown in FIG. 5, the solar inverter circuit provided by this embodiment also includes: an AC contactor 113, and the AC contactor is connected between the LCL filter and the AC filter. between.
特别的，为了防止电磁干扰，本实施例提供的太阳能逆变电路中，所述第一直流滤波器和/或第二直流滤波器为直流电磁兼容性滤波器；所述交流滤波器为交流电磁兼容性滤波器。In particular, in order to prevent electromagnetic interference, in the solar inverter circuit provided by this embodiment, the first DC filter and/or the second DC filter are DC electromagnetic compatibility filters; the AC filter is an AC filter. EMC filter.
在本实施例中，当用户需要对逆变器进行安装、维护时，可以通过第一直流断路器、第二直流断路器和交流断路器断开，防止设备带电对用户造成危害；特别的，由于通过第一直流断路器、第二直流断路器和交流断路器将电路断开时，电容上仍存在电，因此应等待一段时间保证电容放电完毕后进行安装、维护。In this embodiment, when the user needs to install and maintain the inverter, the first DC circuit breaker, the second DC circuit breaker and the AC circuit breaker can be disconnected to prevent the equipment from being charged and causing harm to the user; especially , because when the circuit is disconnected through the first DC circuit breaker, the second DC circuit breaker and the AC circuit breaker, there is still electricity on the capacitor, so you should wait for a period of time to ensure that the capacitor is discharged before installation and maintenance.
在本实施例中，直流输入端子输入的直流电，经直流滤波器滤波后，通过三相全桥IGBT逆变器将滤波后的直流电变换为高频的三相交流电；该三相交流电经LCL滤波器滤波后，经交流滤波器滤波输出；通过上述太阳能逆变电路逆变后，通过外置的三相变压器隔离升压后并入电网发电。其中，三相全桥IGBT逆变器由电解电容和绝缘栅双极型晶体管IGBT组成，具体连接关系如图1-4中105所示；LCL滤波器由六个电感和三个电容组成，具体连接关系如图1-4中106所示。In this embodiment, the DC power input by the DC input terminal is filtered by a DC filter, and the filtered DC power is converted into a high-frequency three-phase AC power by a three-phase full-bridge IGBT inverter; the three-phase AC power is filtered by an LCL After being filtered by the AC filter, the output is filtered by the AC filter; after inverting through the above-mentioned solar inverter circuit, the voltage is isolated and boosted by an external three-phase transformer, and then connected to the grid for power generation. Among them, the three-phase full-bridge IGBT inverter is composed of electrolytic capacitors and insulated gate bipolar transistors IGBT, the specific connection relationship is shown as 105 in Figure 1-4; the LCL filter is composed of six inductors and three capacitors, specifically The connection relationship is shown as 106 in Figure 1-4.
本实用新型具有如下有益效果：直流输入端子输入的直流电，经直流滤波器滤波后，通过三相全桥IGBT逆变器将滤波后的直流电变换为高频的三相交流电；该三相交流电经LCL滤波器滤波后，经交流滤波器滤波输出。本实用新型实施例提供的技术方案可以使用最大功率点跟踪MPPT方式进行控制，从而提高逆变器的工作效率，解决了现有技术中传统逆变器一般存在着整体效率不够高、母线电压不稳定等缺点的问题。The utility model has the following beneficial effects: the direct current input by the direct current input terminal is filtered by a direct current filter, and the filtered direct current is converted into a high-frequency three-phase alternating current through a three-phase full-bridge IGBT inverter; the three-phase alternating current is passed through After being filtered by the LCL filter, the output is filtered by the AC filter. The technical solution provided by the embodiment of the utility model can use the maximum power point tracking MPPT method to control, thereby improving the working efficiency of the inverter, and solving the problems of the traditional inverter in the prior art that the overall efficiency is not high enough and the bus voltage is not high. Stability and other shortcomings.
以上实施例的先后顺序仅为便于描述，不代表实施例的优劣。The sequence of the above embodiments is only for convenience of description, and does not represent the advantages or disadvantages of the embodiments.
最后应说明的是：以上实施例仅用以说明本实用新型的技术方案，而非对其限制；尽管参照前述实施例对本实用新型进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本实用新型各实施例技术方案的精神和范围。Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.
Claims (7)
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| CN104935203A (en) * | 2015-04-30 | 2015-09-23 | 祥天控股（集团）有限公司 | Solar inverter circuit |
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| CN104935203A (en) * | 2015-04-30 | 2015-09-23 | 祥天控股（集团）有限公司 | Solar inverter circuit |
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