CN202841003U - Novel three-phase photovoltaic grid-connected inverter system structure - Google Patents

Novel three-phase photovoltaic grid-connected inverter system structure Download PDF

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CN202841003U
CN202841003U CN 201220443069 CN201220443069U CN202841003U CN 202841003 U CN202841003 U CN 202841003U CN 201220443069 CN201220443069 CN 201220443069 CN 201220443069 U CN201220443069 U CN 201220443069U CN 202841003 U CN202841003 U CN 202841003U
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dc
connected
ac
circuit
grid
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CN 201220443069
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王建军
严长辉
于虹
陈守信
苏潮
杨振宇
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广东明阳龙源电力电子有限公司
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion electric or electronic aspects
    • Y02E10/563Power conversion electric or electronic aspects for grid-connected applications

Abstract

The utility model discloses a novel three-phase photovoltaic grid-connected inverter system structure. Photovoltaic array output terminals are connected with DC circuit breakers (1), DC EMI filters (2) and BOOST circuits (3) used for direct current boosting and maximum power tracing successively. Output terminals of the BOOST circuits (3) are connected in parallel, and then successively connected with a DC support capacitor (4) used for absorbing ripple current from a DC side and an inverter side, a three-phase full-bridge IGBT inverter circuit (5) used for converting DC to AC, a sine filter (6) used for eliminating AC harmonic waves, an AC main contactor (7) used for on-off control for circuit protection, an AC EMI filter (8) used for eliminating high-frequency interference and an AC circuit breaker (9) used for realizing the connection and the disconnection of a main power circuit and a power grid. An output terminal of the AC circuit breaker (9) is connected with the power grid.

Description

一种新型三相光伏并网逆变器系统结构 A novel three-phase photovoltaic inverter system architecture

[技术领域] [Technical Field]

[0001] 本实用新型涉及一种新型三相光伏并网逆变器系统结构。 [0001] The present invention relates to a novel three-phase photovoltaic inverter system architecture.

[背景技术] [Background technique]

[0002] 目前,1丽三相光伏发电系统如图3所示,大都采用两台500kW光伏并网逆变器输出直接并联,或者如图4所示的采用两台500kW光伏并网逆变器然后通过一台双分裂升压箱变的两个低压绕组并联来实现,并网电压等级基本为270V、300V、315V这几种,其并网电压低,系统发电效率比较低。 [0002] Currently, a three-phase Li photovoltaic power generation system shown in FIG, mostly by two 500kW photovoltaic grid-connected inverter 3 outputs in parallel directly, or as shown in FIG. 4 and FIG using two 500kW inverter with PV then passed through a low-voltage winding in parallel with the booster tank becomes double split by two, and the grid voltage level is substantially 270V, 300V, 315V these types, and the low voltage grid, the power generation efficiency of the system is relatively low. 前级的电池组件组合要求统一,不能实现多种不同组合类型的光伏阵列一起并网。 Pre-unified battery pack combination of requirements, can not achieve a variety of combinations of different types of photovoltaic arrays with the grid. 为了满足不同光伏阵列组合并网发电和提高系统发电效率,本设计人实用新型出如下技术方案。 In order to meet the different combinations of the PV array and power generation system and increasing power generation efficiency, the present invention illustrating the designer the following technical solution.

[实用新型内容] [SUMMARY]

[0003] 本实用新型克服了上述技术的不足,提供了一种新型三相光伏并网逆变器系统结构,其可对不同的光伏阵列输出直流电进行独立升压后一起并网发电,兼容性好,通过BOOST升压电路分别对对应的光伏阵列进行升压及通过控制器进行BOOST升压电路的最大功率点跟踪控制,扩大了最大功率点跟踪范围,提高了直流侧电压和逆变转化效率,然后通过单独的一个逆变器就能与不同的光伏阵列组合连接并网发电,节省成本,同时,满足不同的环境需求,提高光能利用率和系统发电效率。 [0003] The present invention overcomes the disadvantages of the techniques described above, there is provided a novel three-phase photovoltaic inverter system structure that can be independently boosted after the grid with different DC output of the photovoltaic array, compatibility good, respectively corresponding to the PV array and boosting maximum power point tracking control performed by the controller bOOST boosting circuit by the booster circuit bOOST, expanding the range of the maximum power point tracking, and to improve the DC voltage conversion efficiency of the inverter then able to connect a single inverter through different combinations of the photovoltaic array and the grid, cost, while meeting the needs of different environments, systems, and to improve the energy utilization efficiency of power generation.

[0004] 为实现上述目的,本实用新型采用了下列技术方案: [0004] To achieve the above object, the present invention uses the following technical scheme:

[0005] 一种新型三相光伏并网逆变器系统结构,可对不同的光伏阵列输出直流电进行独立升压后一起并网发电,在每个光伏阵列直流输出端顺次连接有直流断路器1、直流EMI滤波器2,以及用于对输出直流电进行升压及最大功率跟踪的BOOST升压电路3,所述所有BOOST升压电路3的输出端并联连接后顺次连接有用于吸收来自直流侧和逆变器侧的纹波电流的直流支撑电容4,用于把直流电转换成交流电的三相全桥IGBT逆变器电路5,用于消除交流谐波的正弦滤波器6,用于电路保护通断控制的交流主接触器7,用于消除高频干扰的交流EMI滤波器8,以及用于实现主功率电路与电网通断的交流断路器9,所述交流断路器9输出端与电网连接,所述系统结构还包括有用于实时检测交直流侧电流电压的电流电压检测模块12,以及通过电流电压检测模块12的检测值来对BOOST升压电路3 [0005] After a new three-phase grid-connected inverter photovoltaic system structure, can be independently different boosting DC power output of the PV array with grid sequentially connect each DC breaker on the DC output of the PV array 1, DC EMI filter 2, and the bOOST DC booster circuit for boosting the output of the maximum power tracking of 3, all of the booster circuit sequentially bOOST output terminal 3 connected to the connection in parallel for direct absorption from DC link ripple current side and the inverter side of the capacitor 4, for converting alternating current into direct current IGBT three-phase full-bridge inverter circuit 5, for eliminating harmonics AC sine filter 6, a circuit for protection AC main contactor 7-off control, AC EMI filter for eliminating high frequency interference 8, the AC circuit breaker and the main power circuit for realizing an electrical 9 Netcom off, the AC output terminal 9 of the circuit breaker grid connection, the system configuration further comprises a voltage-current detecting means for detecting the real-time current and voltage of the DC-side 12, and a voltage detection value by the current detecting module 12 to three pairs of the booster circuit bOOST 行最大功率跟踪控制的控制器15,所述控制器15分别与BOOST升压电路3、三相全桥IGBT逆变器电路5控制连接。 MPPT control line controller 15, the controller 3 respectively, IGBT three-phase full-bridge inverter circuit 5 controls the booster circuit 15 is connected to the BOOST.

[0006] 所述电流电压检测模块12包括用于检测直流侧电流电压的直流电压传感器和电流互感器,以及用于检测交流侧电流电压的交流电压采集板和电流互感器。 The [0006] 12 comprises a current and voltage detecting module for detecting a dc side current voltage DC voltage sensor and a current transformer, and an AC voltage and current collecting plate side current transformer for detecting the alternating voltage.

[0007] 所述每个光伏阵列直流输出端与对应的直流断路器I输入端之间连接有直流避雷器10,所述交流断路器9输出端与电网之间连接有交流避雷器11。 [0007] The DC output terminal of each photovoltaic array corresponding to the DC circuit breaker and the input I is connected between the ends of the arrester 11 is connected between an AC output terminal 9 DC arrester 10, and the AC power circuit breaker.

[0008] 所述交流主接触器7两端还并接有由交流辅助接触器71和缓冲电阻72串接所组成的辅助开关电路。 [0008] The AC main contactor 7 and further connected with both ends of the auxiliary switching circuit 71 by the AC auxiliary contacts, and a buffer resistor 72 connected in series thereof. [0009] 所述光伏阵列、直流断路器1、直流EMI滤波器2及BOOST升压电路3的个数都为两个,所述两个BOOST升压电路3的输出正极端相连接后与直流支撑电容4正极连接,负极端相连接后与直流支撑电容4负极连接。 [0009] The photovoltaic array, the DC circuit breaker 1, and the number of DC BOOST EMI filter 2 of the booster circuit 3 are two, the two outputs of the BOOST boosting circuit 3 is connected to the positive terminal of the DC a support connected to the positive capacitor 4, is connected to the negative terminal of the capacitor 4 connected to the negative DC link. [0010] 所述光伏阵列、直流断路器1、直流EMI滤波器2及BOOST升压电路3的个数都为3个,所述3个BOOST升压电路3的输出正极端相连接后与直流支撑电容4正极连接,负极端相连接后与直流支撑电容4负极连接。 After [0010] the photovoltaic array, the DC circuit breaker 1, and the number of DC EMI filter 2 BOOST booster circuit 3 are both 3, the output of the booster circuit 3 BOOST terminal 3 is connected to the positive DC a support connected to the positive capacitor 4, is connected to the negative terminal of the capacitor 4 connected to the negative DC link. [0011 ] 所述正弦滤波器6为LCL正弦滤波器。 The [0011] sinusoidal filter 6 is LCL sine filter. [0012] 本实用新型的有益效果是:[0013]1、可对不同的光伏阵列输出直流电进行独立升压后一起并网发电,对要接入的光伏阵列的兼容性好;[0014] 2、通过BOOST升压电路分别对对应的光伏阵列进行升压及通过控制器对进行BOOST升压电路的最大功率点跟踪控制,扩大了最大功率点跟踪范围,提高了直流侧电压和逆变转化效率。 [0012] The beneficial effects of the present invention are: [0013] 1, can be independently boosted after the grid with different DC output of the photovoltaic array, good compatibility of the photovoltaic array to be accessed; [0014] 2 , corresponding to the PV array by bOOST boost circuit boosting and respectively by maximum power point tracking controller for controlling the booster circuit bOOST, expanding the range of the maximum power point tracking, and to improve the DC voltage conversion efficiency of the inverter . [0015] 3、通过单独的一个逆变器就能与不同的光伏阵列组合连接并网发电,节省成本, 提高了并网侧电压,同时,满足不同光伏阵列组合方式和不同的环境需求,提高光能利用率和系统发电效率。 [0015] 3, can be connected by a separate one of the inverters with different PV array assembly grid, saving costs, and improving the network side voltage, while, to meet the different combinations of the PV array and different environmental needs, improve solar energy utilization and system power generation efficiency. [0016] 4、通过增加直流避雷器和交流断路器,防止雷击,保护器件安全。 [0016] 4, by increasing the AC and DC circuit breakers arrester, to prevent lightning strikes, safety protection device. [0017] 5、通过辅助开关电路,减小开机启动时的电流冲击。 [0017] 5 via the auxiliary switching circuit, to reduce the shock at the current boot. [附图说明][0018] 图1是本实用新型实施例1的电路结构示意图。 [BRIEF DESCRIPTION] [0018] FIG. 1 is a schematic circuit configuration of Example 1 of the present embodiment of the invention. [0019] 图2是本实用新型实施例2的电路结构示意图。 [0019] FIG. 2 is a schematic circuit configuration of Example 2 of the present embodiment of the invention. [0020] 图3是现有技术中使用三相变压器的光伏并网系统结构示意图。 [0020] FIG. 3 is a prior art three-phase transformer used in a photovoltaic system and a schematic diagram of the network architecture. [0021] 图4是现有技术中使用三相双分裂变压器的光伏并网系统结构示意图。 [0021] FIG. 4 is a schematic diagram of the network system configuration using the prior art three-phase PV and double split transformer. [具体实施方式][0022] 下面结合附图与本实用新型的实施方式作进一步详细的描述:[0023] 一种新型三相光伏并网逆变器系统结构,可对不同的光伏阵列输出直流电进行独立升压后一起并网发电,其特征在于在每个光伏阵列直流输出端顺次连接有直流断路器1、 直流EMI滤波器2,以及用于对输出直流电进行升压及最大功率跟踪的BOOST升压电路3, 所述所有BOOST升压电路3的输出端并联连接后顺次连接有用于吸收来自直流侧和逆变器侧的纹波电流的直流支撑电容4,用于把直流电转换成交流电的三相全桥IGBT逆变器电路5,用于消除交流谐波的正弦滤波器6,用于电路保护通断控制的交流主接触器7,用于消除高频干扰的交流EMI滤波器8,以及用于实现主功率电路与电网通断的交流断路器9,所述交流断路器9输出端与电网连接,所述系统结构还包括有用于实时检测交直 [DETAILED DESCRIPTION] [0022] The accompanying drawings in conjunction with embodiments of the present invention will be further described in detail: [0023] A novel three-phase photovoltaic inverter system structure, the DC output of the PV arrays of different after boosting with independent grid, wherein each photovoltaic arrays are sequentially connected with a DC output terminal of the DC circuit breaker 1, 2 DC EMI filter, and for boosting DC power output or the maximum power tracking bOOST boosting circuit 3, all the bOOST output terminal connected to the booster circuit 3 is connected in parallel with a DC link capacitance sequentially for absorbing ripple current from the DC side and the inverter side 4, for converting direct current into EMI filter AC three-phase alternating current full-bridge IGBT inverter circuit 5, for eliminating harmonics AC sine filter 6, for protecting the on-off control of the AC main contactor circuits 7, for eliminating high-frequency noise 8, the AC circuit breaker and the main power circuit for realizing an electrical 9 Netcom off, the AC output terminal of the circuit breaker 9 connected to the grid, said system further comprising a structure for real-time detection of AC-DC 流侧电流电压的电流电压检测模块12,以及通过电流电压检测模块12的检测值来对BOOST升压电路3进行最大功率跟踪控制的控制器15,所述控制器15分别与BOOST升压电路3、三相全桥IGBT 逆变器电路5控制连接,分别进行BOOST升压电路3的升压控制和三相全桥IGBT逆变器电路5的逆变控制。 Stream side of the current-voltage current and voltage detection module 12, and by the current detection module detects a voltage value of 12 to 15, the controller 15 respectively BOOST boosting circuit booster circuit controller 3 BOOST maximum power tracking control 3 , IGBT three-phase full-bridge inverter control circuit 5 is connected to an inverter for controlling the booster circuit boosting control bOOST 3 and three-phase full-bridge IGBT inverter circuit 5, respectively. [0024] 如上所述电流电压检测模块12包括用于检测直流侧电流电压的直流电压传感器和电流互感器,以及用于检测交流侧电流电压的交流电压采集板和电流互感器,以便于控制器15对BOOST升压电路3进行最大功率跟踪控制。 [0024] As described above the current voltage detecting module 12 comprises means for detecting current DC side voltage of a DC voltage sensor and a current transformer, and an AC voltage and current collecting plate side current transformer for detecting the alternating voltage, so that the controller 15 pairs of the booster circuit 3 bOOST maximum power tracking control.

[0025] 如上所述的每个光伏阵列直流输出端与对应的直流断路器I输入端之间连接有直流避雷器10,所述交流断路器9输出端与电网之间连接有交流避雷器11,防止雷击,保护器件安全。 [0025] current I is connected between the input terminal of the circuit breaker as described above, each photovoltaic array corresponding to the DC output terminal of a DC arrester 10, the alternating current AC arrester 11 is connected between the output terminal 9 and the power circuit breaker, preventing lightning protection device security.

[0026] 如上所述交流主接触器7在正常状态下接通,故障情况断开,实现保护功能。 [0026] As described above AC main contactor 7 is turned on in a normal state, failure disconnected, to achieve protection.

[0027] 本实用新型中所述交流主接触器7两端还并接有由交流辅助接触器71和缓冲电阻72串接所组成的辅助开关电路,通过缓冲电阻72减小电流冲击。 [0027] In the present invention, the AC main contactor 7 and further connected with both ends of the auxiliary switching circuit 71 by the AC auxiliary contacts, and a buffer resistor 72 connected in series composed by a buffer resistor 72 to reduce the current surge. 开机时,首先辅助开关电路中的交流辅助接触器71闭合,交流电通过缓冲电阻72,并利用三相全桥IGBT逆变器电路5中的续流二极管形成的三相整流桥电路对直流支撑电容4进行充电,然后再闭合主接触器7对直流支撑电容4继续充电。 When power is first supplemental AC auxiliary contact switch circuit 71 is closed, an alternating current through the snubber resistor 72 and a diode formed by a phase full bridge IGBT inverter circuit 5 of the freewheeling rectifier three-phase bridge circuit of the DC link capacitor 4 is charged, and then close the main contact 7 continues to charge the DC link capacitor 4.

[0028] 实施例1,如图1所示,所述的光伏阵列为两个,输出直流电压的级别分别是500V、700V时,每个光伏阵列分别通过直流断路器1、直流EMI滤波器2、BOOST升压电路3进行升压、及控制器15进行BOOST升压电路3的最大功率跟踪控制,把电压升压至960V级别,然后通过三相全桥IGBT逆变器电路5进行三相逆变并网发电,并网电压可提高到620V以上,通过上述结构,实现了两种不同的光伏阵列的一起并网,不但扩大了最大功率点跟踪范围,而且提高了直流侧电压和逆变转化效率。 [0028] Example 1, shown in Figure 1, the photovoltaic array is two, the output DC voltage levels are 500V, 700V when, respectively, each PV array through a DC breaker, DC EMI filter 2 , the booster circuit 3 boosts bOOST, bOOST, and the controller 15 performs MPPT control the booster circuit 3, the voltage to a 960V level, and then by reverse-phase IGBT three-phase full-bridge inverter circuit 5 variable grid, and the grid voltage can be increased to 620V or more, the above-described structure, realized with two different grid photovoltaic array, not only expanding the range of the maximum power point tracking, but also increase the conversion of DC voltage and an inverter effectiveness.

[0029] 实施例2,如图2所示,所述的光伏阵列为3个,输出直流电压的级别分别是500V、700V.900V时,每个光伏阵列分别通过直流断路器1、直流EMI滤波器2、BOOST升压电路3进行升压、及控制器15进行BOOST升压电路3的最大功率跟踪控制,把直流侧电压升压至960V级别,然后通过三相全桥IGBT逆变器电路5进行三相逆变并网发电,并网电压可提高到620V以上,通过上述结构,实现了3种不同的光伏阵列的一起并网,不但扩大了最大功率点跟踪范围,而且提高了直流侧电压和逆变转化效率。 [0029] Example 2, as shown, the three photovoltaic array 2, the level of the output DC voltage is 500V, respectively, when 700V.900V, respectively, each PV array through a DC breaker, DC EMI filter is 2, 3 bOOST booster circuit boosting the maximum power tracking control, and the controller 15 performs bOOST boosting circuit 3, the DC-side voltage to a 960V level, then the full bridge IGBT three-phase inverter circuit 5 three-phase inverter and the grid, and the grid voltage can be increased to 620V or more, the above-described structure, realized with three kinds of different grid photovoltaic array, not only expanding the range of the maximum power point tracking, but also increase the DC voltage and inverter conversion efficiency.

[0030] 以上两实施例中所述的正弦滤波器6都可以采用LCL正弦滤波器消除谐波得到与电网同频的交流电。 [0030] The above two embodiments of the sine filter 6 may be employed LCL filter to eliminate harmonics obtained sine same frequency AC power.

[0031] 本实用新型及以上两实施例的具体工作原理如下:光伏阵列转化的直流电经直流配电箱的整合后引出各组正负直流输出线,通过直流断路器I输入到直流EMI滤波器2进行低通滤波,消除直流中高频干扰信号,并实现对直流配电端的保护,然后通过BOOST升压电路3分别对各组输入直流电压进行升压,同时,电流电压检测模块12实时检测直流侧电压、电流、交流侧电压、电流,通过控制器15通过功率计算,完成每个BOOST升压电路3的最大功率跟踪,将稳定的直流电通过直流支撑电容4吸收纹波电流后送入到三相全桥IGBT逆变器电路5,并通过控制器15完成三相全桥IGBT逆变器电路5的驱动,然后三相全桥IGBT逆变器电路5输出的交流电经正弦滤波器6消除谐波得到与电网同频的交流电,并通过交流EMI滤波器8消除高频干扰后并入电网。 [0031] In particular the present invention and the above two embodiments works as follows: PV array converted direct current DC distribution box, after integration of the lead wires of each group the positive and negative DC output, the DC input to the DC breaker EMI filter I 2 for low-pass filtering to eliminate high-frequency interference in the DC signal, and protection for a DC power distribution end, and each group respectively input DC voltage is boosted by the booster circuit 3 bOOST, while real-time current and voltage detecting module 12 detects DC side voltage, current, AC-side voltage, current, through the controller 15 by the power calculating, for each complete MPPT bOOST boosting circuit 3, fed to the three stable DC link capacitor 4 by the DC ripple current absorption phase full bridge IGBT inverter circuit 5, and complete the full bridge IGBT driving a three-phase inverter circuit 5 by the controller 15, and three-phase AC full bridge IGBT inverter circuit 5 outputs a sine filter 6 via harmonic elimination to give the same frequency wave AC grid, and by eliminating high-frequency interference alternating EMI filter 8 after the grid.

[0032] 一般情况下,市场上光伏阵列的输出直流电压的级别为如上几种,如上所述的两个实施例已经满足实际的大部分应用,若实际当中要再连接其他的光伏阵列,本领域技术人员可以根据上述技术启示实现所需。 [0032] In general, the level of the output DC voltage of the PV array is on the market as several, two embodiments described above have been met most practical applications, which again if the actual connection to other photovoltaic arrays, the present field of the art techniques described above may be achieved according to a desired inspiration.

[0033] 本实用新型中实施例中所提的光伏阵列输出电压大小及通过BOOST升压电路3把直流电升压到960V的电压级别等参数,不作为对本实用新型保护范围的限定,其只是一种具体实施例中的参数设定。 Embodiment mentioned PV array output voltage magnitude [0033] In embodiments of the present disclosure and boosted by the booster circuit 3 BOOST DC 960V to the voltage level of the other parameters, not limit the scope of the present invention novel protection, which is only a parameter setting example seed specific embodiments. 本实用新型保护的是一种可对不同的光伏阵列输出直流电进行独立升压后一起并网发电的拓扑结构,满足不同光伏阵列组合方式,兼容性好,通过采用多组BOOST升压电路3分别对多组不同的光伏阵列进行升压,及通过控制器15对各个BOOST 升压电路3进行最大功率点跟踪控制,扩大了最大功率点跟踪范围,大大提闻了直流侧电压,然后通过一个逆变器进行逆变并网发电,节省成本,提高了并网侧电压,同时,满足不同光伏阵列组合方式和不同的环境需求,提高光能利用率和系统发电效率。 The present invention may be protected by a boost topology independence of the grid with a different DC output of the PV array, PV arrays to meet different combinations, good compatibility, a plurality of sets by using the booster circuit 3 respectively BOOST different sets for a photovoltaic array is boosted, and the controller 15 through the maximum power point tracking control of the respective bOOST boosting circuit 3, extends the maximum power point tracking range, greatly improving the smell of the DC voltage, and then through a reverse an inverter for varying the grid, cost savings, improved grid-side voltage, while PV arrays of different combinations to meet different environments and requirements, and to improve the energy utilization efficiency of the power generation system.

Claims (7)

1. 一种新型三相光伏并网逆变器系统结构,可对不同的光伏阵列输出直流电进行独立升压后一起并网发电,其特征在于在每个光伏阵列直流输出端顺次连接有直流断路器(I )、直流EMI滤波器(2),以及用于对输出直流电进行升压及最大功率跟踪的BOOST升压电路(3),所述所有BOOST升压电路(3)的输出端并联连接后顺次连接有用于吸收来自直流侧和逆变器侧的纹波电流的直流支撑电容(4),用于把直流电转换成交流电的三相全桥IGBT逆变器电路(5),用于消除交流谐波的正弦滤波器(6),用于电路保护通断控制的交流主接触器(7),用于消除高频干扰的交流EMI滤波器(8),以及用于实现主功率电路与电网通断的交流断路器(9),所述交流断路器(9)输出端与电网连接,所述系统结构还包括有用于实时检测交直流侧电流电压的电流电压检测模块(12),以及通过电 A novel three-phase photovoltaic inverter system structure, can be independently boosted after the grid with different DC output of the PV array, wherein each photovoltaic array serially connected DC output terminal DC the circuit breaker (the I), DC EMI filter (2), and the bOOST booster circuit for boosting the direct current output and the maximum power point tracking (3), all the bOOST booster circuit (3) in parallel with the output after the connection is sequentially connected for absorbing ripple current DC link capacitor from the DC side and the inverter side (4) for converting DC power to three-phase full-bridge IGBT inverter circuit (5) into alternating current, with AC sine filter to eliminate harmonics (6), AC main contactor (7) to protect the on-off control circuit for eliminating high-frequency interference alternating EMI filter (8), and for realizing the primary power AC circuit breakers and electrical Netcom off (9), said AC circuit breaker (9) an output terminal connected to the grid, the current system configuration further comprises a voltage detecting means for detecting real DC side current voltage (12) and by electrical 电压检测模块(12)的检测值来对BOOST升压电路(3)进行最大功率跟踪控制的控制器(15),所述控制器(15)分别与BOOST升压电路(3 )、三相全桥IGBT逆变器电路(5 )控制连接。 Voltage measuring module (12) to the detected value a controller (15) to the maximum power tracking control BOOST booster circuit (3), said controller (15) respectively BOOST booster circuit (3), three-phase full IGBT inverter bridge circuit (5) connected to the control.
2.根据权利要求1所述的一种新型三相光伏并网逆变器系统结构,其特征在于所述电流电压检测模块(12 )包括用于检测直流侧电流电压的直流电压传感器和电流互感器,以及用于检测交流侧电流电压的交流电压采集板和电流互感器。 The three-phase A novel photovoltaic according to claim 1 and grid inverter system structure, characterized in that said current and voltage detecting module (12) comprises a sensor for detecting a DC voltage dc side current and the voltage of the current transformer , as well as for detecting AC side current collecting plate ac voltage and current transformers.
3.根据权利要求1所述的一种新型三相光伏并网逆变器系统结构,其特征在于所述每个光伏阵列直流输出端与对应的直流断路器(I)输入端之间连接有直流避雷器(10),所述交流断路器(9)输出端与电网之间连接有交流避雷器(11)。 The three-phase A novel photovoltaic according to claim 1 and grid inverter system structure, characterized in that connected between the DC output terminal of each photovoltaic array corresponding DC breaker (I) input terminal DC arrester (10), said AC circuit breaker (9) is connected to the AC arrester (11) between the output and the power grid.
4.根据权利要求1所述的一种新型三相光伏并网逆变器系统结构,其特征在于所述交流主接触器(7)两端还并接有由交流辅助接触器(71)和缓冲电阻(72)串接所组成的辅助开关电路。 The photovoltaic a new three-phase inverter according to a grid system architecture as claimed in claim, wherein said AC main contactor (7) at both ends and is also connected with the AC auxiliary contacts (71) and snubber resistor (72) connected in series circuit composed of the auxiliary switch.
5.根据权利要求1所述的一种新型三相光伏并网逆变器系统结构,其特征在于所述光伏阵列、直流断路器(I)、直流EMI滤波器(2)及BOOST升压电路(3)的个数都为两个,所述两个BOOST升压电路(3)的输出正极端相连接后与直流支撑电容(4)正极连接,负极端相连接后与直流支撑电容(4)负极连接。 5. A novel photovoltaic three-phase inverter according to a grid system architecture as claimed in claim, wherein said photovoltaic array, a DC breaker (the I), DC EMI filter (2) and booster circuit BOOST (3) are the number two, the two output bOOST booster circuit (3) the positive terminal (4) connected to the DC positive electrode is connected to the supporting capacitor, the negative terminal is connected to the DC link capacitor (4 ) connected to the negative.
6.根据权利要求1所述的一种新型三相光伏并网逆变器系统结构,其特征在于所述光伏阵列、直流断路器(I)、直流EMI滤波器(2 )及BOOST升压电路(3 )的个数都为3个,所述3个BOOST升压电路(3)的输出正极端相连接后与直流支撑电容(4)正极连接,负极端相连接后与直流支撑电容(4)负极连接。 A novel three-phase according to claim 1 and a photovoltaic inverter system grid structure as claimed in claim, wherein said photovoltaic array, a DC breaker (the I), DC EMI filter (2) and booster circuit BOOST (3) the number of all three, the output of the booster circuit 3 bOOST (3) the positive terminal (4) connected to the DC positive electrode is connected to the supporting capacitor, the negative terminal is connected to the DC link capacitor (4 ) connected to the negative.
7.根据权利要求1所述的一种新型三相光伏并网逆变器系统结构,其特征在于所述正弦滤波器(6)为LCL正弦滤波器。 The three-phase A novel photovoltaic according to claim 1 and grid inverter system structure, characterized in that said sinusoidal filter (6) LCL as sine filter.
CN 201220443069 2012-08-31 2012-08-31 Novel three-phase photovoltaic grid-connected inverter system structure CN202841003U (en)

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Cited By (7)

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CN102832842A (en) * 2012-08-31 2012-12-19 广东明阳龙源电力电子有限公司 Novel three-phase photovoltaic grid-connected inverter system
CN103414361A (en) * 2013-07-26 2013-11-27 常州佳讯光电产业发展有限公司 Main circuit topological structure of single megawatt photovoltaic grid-connected inverter
CN103633865A (en) * 2013-11-27 2014-03-12 苏州高创特新能源工程有限公司 Large-power photovoltaic gird-connected inverter
CN103887956A (en) * 2014-04-15 2014-06-25 上海西艾爱电子有限公司 High-voltage and large-current harmonics filter for photovoltaic inverter system
CN104935202A (en) * 2015-04-30 2015-09-23 祥天控股(集团)有限公司 Solar inverter
CN106100406A (en) * 2015-04-27 2016-11-09 Abb技术有限公司 Obtain the method for value, interlock circuit and the inverter of instruction inverter ac electric current
CN106533148A (en) * 2016-12-20 2017-03-22 北京天诚同创电气有限公司 Photovoltaic inverter having emergency stop function and emergency stop method for photovoltaic inverter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102832842A (en) * 2012-08-31 2012-12-19 广东明阳龙源电力电子有限公司 Novel three-phase photovoltaic grid-connected inverter system
CN103414361A (en) * 2013-07-26 2013-11-27 常州佳讯光电产业发展有限公司 Main circuit topological structure of single megawatt photovoltaic grid-connected inverter
CN103633865A (en) * 2013-11-27 2014-03-12 苏州高创特新能源工程有限公司 Large-power photovoltaic gird-connected inverter
CN103887956A (en) * 2014-04-15 2014-06-25 上海西艾爱电子有限公司 High-voltage and large-current harmonics filter for photovoltaic inverter system
CN103887956B (en) * 2014-04-15 2016-01-20 上海西艾爱电子有限公司 A kind of high-voltage great-current harmonic filter being suitable for photovoltaic inverting system and using
CN106100406A (en) * 2015-04-27 2016-11-09 Abb技术有限公司 Obtain the method for value, interlock circuit and the inverter of instruction inverter ac electric current
CN104935202A (en) * 2015-04-30 2015-09-23 祥天控股(集团)有限公司 Solar inverter
CN106533148A (en) * 2016-12-20 2017-03-22 北京天诚同创电气有限公司 Photovoltaic inverter having emergency stop function and emergency stop method for photovoltaic inverter

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