CN104917281B - An inverter and a power switching circuit and method for zero-City - Google Patents

An inverter and a power switching circuit and method for zero-City Download PDF

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CN104917281B
CN104917281B CN 201510293524 CN201510293524A CN104917281B CN 104917281 B CN104917281 B CN 104917281B CN 201510293524 CN201510293524 CN 201510293524 CN 201510293524 A CN201510293524 A CN 201510293524A CN 104917281 B CN104917281 B CN 104917281B
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load
inverter
mains
thyristor
power
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CN 201510293524
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CN104917281A (en )
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肖学礼
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深圳市盛弘电气股份有限公司
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本发明公开了一种逆变器和市电零切换电路及方法,用于解决现有技术中在逆变器和市电切换为负载供电,且市电突然中断时,逆变器电流会倒送入市电,使得负载供电中断的技术问题,所述零切换电路包括:相互反向并联的第一、第二晶闸管(11、12),用于导通或断开市电电网和负载;输入端与市电电网相连,输出端与第一、第二晶闸管(11、12)相连的脉冲变压器(2),用于分别在市电电网正半周或负半周供电时导通第一晶闸管(11)或第二晶闸管(12);逆变器供电子电路(3),用于与市电电网连通并充电储能或给负载供电,还用于在市电电网断电时与市电电网断开,给负载供电;实现了市电电网与逆变器零切换为负载供电的技术效果。 When the present invention discloses an inverter and a mains zero switching circuit and method for solving the prior art and in the inverter switching mains to supply the load, and the electricity is suddenly interrupted, the inverter current will fall into the mains, so that the technical problem of load interruption, the zero switch circuit comprises: a first, a second thyristor (11, 12) is turned on or off for the mains and the load antiparallel to each other; an input terminal connected to the electricity grid, and the first output terminal, a second thyristor (11, 12) of the pulse transformer (2) is connected, a first thyristor for turning on the positive half cycle or a negative half cycle in the mains supply respectively ( 11) or the second thyristor (12); an inverter for an electronic circuit (3) for communicating with the electricity grid and to the load power or charge the energy storage, is further configured to de-energized with the mains electricity grid off power to the load; the electricity grid and to achieve a zero switch inverter technology for the effect of load power.

Description

一种逆变器和市电零切换电路及方法 An inverter and a power switching circuit and method for zero-City

技术领域 FIELD

[0001] 本发明涉及不间断供电技术领域,尤其涉及一种逆变器和市电零切换电路及方法。 [0001] The present invention relates to an uninterruptible power supply technology, and particularly relates to an inverter and an electrical switching circuit and method for zero-City.

背景技术 Background technique

[0002] 目前,在不间断电源(UPS,Uninterruptible Power Source)和微网的应用中,经常遇到逆变器和市电电网切换为负载(包括用电设备)供电,其中切换时间是非常关键的指标。 [0002] At present, the application of uninterruptible power supply (UPS, Uninterruptible Power Source) and micro-networks often encountered inverter and the mains switch to load (including electrical equipment) power supply, which is critical switching time index of. 现有技术中常用的逆变器供电和市电电网供电的切换电路如图1所示,包括串联在负载的市电电网供电线路中且相互反向并联的晶闸管(SCR1和SCR2),与负载并联的逆变器供电电路(包括电池和DC/AC逆变器),DC/AC逆变器的一端口通过开关K与负载的一端相连,并通过晶闸管(SCR1和SCR2)与市电电网的火线L相连,DC/AC逆变器的另一端口与负载的另一端(即市电电网的零线N)相连;其中,在逆变器供电电路工作时,DC/AC逆变器通过将电池的直流电转换为交流电为负载供电。 Commonly used in the prior art inverter power supply and the mains supply switching circuit shown in Figure 1, comprises a series of load in the mains supply line grid and mutually antiparallel thyristors (the SCR1 and SCR2), and the load the parallel inverter power supply circuit (including a battery and a DC / AC inverter), DC / AC inverter is connected to a port of the switch through the end K of the load, and through the thyristor (the SCR1 and SCR2) and the electricity grid live wire L is connected, DC / AC inverter and the other end of the load port of another (i.e., the zero line of the mains N) connected; wherein, when the power supply of the inverter circuit, DC / AC inverter by battery DC to AC power to the load.

[0003] 如图1所示的负载供电切换电路,为保证其最小的切换时间,相关的控制方法是: 设定晶闸管(SCR1和SCR2)同时得到触发脉冲而导通,使得市电电网给负载供电,此时开启DC/AC逆变器,让逆变器跟踪市电输入的频率、相位和电压幅值,在跟踪上之后,闭合开关K, 以使逆变器供电电路和市电电网共同导通一短暂时间,然后关闭晶闸管(SCR1和SCR2)的触发脉冲,那么负载就由逆变器供电电路供电;当负载需要重新由市电电网供电时,则先让逆变器重新跟踪市电输入的频率、相位和电压幅值,在跟踪上之后,开通晶闸管(SCR1和SCR2) 的触发脉冲,逆变器和市电共同导通一短暂时间,然后断开开关K,以关闭逆变器,负载就由市电电网供电了。 Power the load shown [0003] FIG switching circuit, in order to ensure the minimum switching time, the associated control method is: set the thyristors (the SCR1 and SCR2) trigger pulse obtained simultaneously turned on, so that the mains to a load supply, this time opening DC / AC inverter so that the inverter frequency tracking, phase and voltage amplitude of the electrical input city, after tracking, closes the switch K, so that the inverter circuit and the mains power supply common conducting a short time, and then close the trigger pulse thyristor (SCR1 and SCR2), then the load on the power supplied by the inverter circuit; when the need to re-load the mains power, then let the inverter to re-trace the mains input frequency, phase and voltage amplitude, after tracking, open thyristor (the SCR1 and SCR2) of the trigger pulse, an inverter and a common-mains for a short time, and then off the switch K, to turn off the inverter the load on the mains supply network.

[0004] 可见,在现有的逆变器供电和市电电网供电的切换电路中,晶闸管(SCR 1和SCR2) 的开和关是切换正常进行的关键,然而晶闸管关闭需要电流过零或施加反压,当市电突然中断时,晶闸管可能仍处于导通状态,使得逆变器电流倒送市电电网,从而导致负载供电的中断。 [0004] visible, in the conventional inverter power supply and the mains supply switching circuit, a thyristor (SCR 1 and SCR2) of switching on and off key is performed normally, however, the need to close the thyristor current zero or application back pressure, when the electricity suddenly interrupted, the thyristor may still be in the conduction state, so that the inverter current down to the municipal electricity grid, resulting in interruption of power to the load.

[0005] 也就是说,现有技术中存在:在逆变器和市电电网切换为负载供电,且市电突然中断时,逆变器电流会倒送入市电电网中,使得负载供电中断的技术问题。 [0005] In other words, in the prior art: when switching inverter and the electricity grid to supply the load, and the sudden interruption of electricity, the inverter current will fall into the electricity grid, so that the load interruption technical problems.

发明内容 SUMMARY

[0006] 本申请实施例通过提供一种逆变器和市电零切换电路及方法,解决了现有技术中在逆变器和市电电网切换为负载供电,且市电突然中断时,逆变器电流会倒送入市电电网中,使得负载供电中断的技术问题,实现了逆变器和市电电网协同为负载供电,在市电电网突然中断时,断开市电电网和逆变器供电电路,防止逆变器输出功率倒送入市电电网,且逆变器供电电路无缝接替市电电网持续为负载供电的技术效果。 [0006] Example embodiments of the present application provided by an inverter and a switching circuit electrically City zero and method solves the prior art, when switching the inverter and the mains to supply the load, and the electricity is suddenly interrupted, an inverse variable current will fall into the electricity grid in such a technical issue load interruption, to achieve the inverter and the electricity grid collaborative supply the load when a sudden interruption of the electricity grid, disconnect the electricity grid and inverters powered circuit to prevent the inverter output power back into the electricity grid, and the inverter power supply circuit seamlessly take over the electricity grid continued technical effect of load power is.

[0007]第一方面,本申请实施例提供了一种逆变器和市电零切换电路,用于为负载不间断供电,所述零切换电路包括: [0007] In a first aspect, the present application provides an embodiment of the inverter switching circuit and a mains zero, uninterruptible power supply for a load, the zero switch circuit comprises:

[0008] 串联于市电电网和所述负载的连接线路中,且相互反向并联的第一晶闸管和第二晶闸管,用于在所述市电电网通电时导通,以连通所述市电电网和所述负载,使得所述市电电网为所述负载供电,以及用于在所述市电电网断电时断开所述市电电网和所述负载; [0008] connected in series with the load and the mains connection line, and mutually antiparallel thyristors of the first and second thyristor for turning on when the power utility grid, to communicate the mains grid and the load, such that the utility grid to power the load, and means for disconnecting the utility grid and the load when the utility power grid outage;

[0009] 输入端与所述市电电网的零线和火线相连,输出端与所述第一晶闸管和所述第二晶闸管相连的脉冲变压器,用于在所述市电电网正半周供电时向所述第一晶闸管提供正触发脉冲,以使所述第一晶闸管导通,以及在所述市电电网负半周供电时向所述第二晶闸管提供正触发脉冲,以使所述第二晶闸管导通; [0009] The input terminal is connected to the zero line and the live wire of the mains, connected to the output terminal of the first thyristor and said second thyristor of the pulse transformer for the positive half cycle of the power supply to the electricity grid providing said first thyristor positive trigger pulse, so that the first thyristor, and providing said second thyristor when the mains power supply positive half cycle of the negative power trigger pulse, so that the second thyristor through;

[0010] 连接于所述负载的两端之间的逆变器供电子电路,用于在与所述负载的两端连通后,且所述市电电网通电时,与所述市电电网连通并充电储能或给所述负载供电,还用于在与所述负载的两端连通后,且在所述市电电网断电的同时,与所述市电电网断开,并给所述负载供电。 [0010] connected between both ends of the load for an inverter electronic circuit for communicating with the ends of the load and the mains power grid, in communication with the electricity grid and charging the energy storage to the load or power supply is further configured to communicate with the rear ends of the load, and at the same time the mains power failure, disconnect the electricity grid, and to the load.

[0011] 可选的,所述脉冲变压器的输入端包括:与所述火线连接的第一输入端子和与所述零线连接的第二输入端子; [0011] Optionally, an input terminal of the pulse transformer comprising: a first input terminal connected to the live wire and a second input terminal connected to the zero line;

[0012] 所述零切换电路还包括:串联在所述第一输入端子和所述火线的连接线上的第一开关,用于在所述市电电网通电时闭合,以使所述脉冲变压器通电工作,在所述市电电网正半周供电时向所述第一晶闸管提供正触发脉冲,在所述市电电网负半周供电时向所述第二晶闸管提供正触发脉冲。 [0012] The zero switch circuit further comprising: connected in series to the first input terminal and a first switch connected to said live wire of the line, for closing when the utility grid is energized, so that the pulse transformer power work, providing the first positive half cycle when the thyristor power supply to the utility grid positive trigger pulse, providing positive trigger pulse to the thyristor when the second negative mains half cycle power supply.

[0013] 可选的,所述脉冲变压器包括:铁芯,缠绕在所述铁芯上的初级线圈、第一次级线圈和第二次级线圈; [0013] Optionally, said pulse transformer comprising: a core, wound on the iron core of the primary coil, the first coil and second coil;

[0014] 所述初级线圈包括所述第一输入端子和所述第二输入端子;所述第一次级线圈包括与所述第一晶闸管和所述第二晶闸管连接的第一输出端子和第二输出端子;所述第二次级线圈包括与所述第一晶闸管和所述第二晶闸管连接的第三输出端子和第四输出端子; [0014] The primary coil comprises a first input terminal and the second input terminal; the first coil comprises a first and a second output terminal connected to said first thyristor and said second thyristor a second output terminal; a second secondary winding comprises a third output terminal and fourth output terminal connected to said first thyristor and said second thyristor;

[0015] 其中,在所述市电电网正半周供电时,所述第二输出端子和所述第三输出端子获得正输出,以使所述第一晶闸管承受正电压,并获得正触发脉冲;在所述市电电网负半周供电时,所述第一输出端子和所述第四输出端子获得正输出,以使所述第二晶闸管承受正电压,并获得正触发脉冲。 [0015] wherein, in the positive half cycle of the mains power supply, the second output terminal of said third output terminal and positive output is obtained, so that the first thyristor receiving a positive voltage, and obtaining a positive trigger pulse; when the negative mains half cycle power supply, the first output terminal and the fourth output terminal of the positive output is obtained, so that the second thyristor receiving a positive voltage, and obtaining a positive trigger pulse.

[0016] 可选的,所述逆变器供电子电路包括:电池,以及与所述电池正负极相连且连接于所述负载的两端之间的逆变器; [0016] Optionally, electronic circuitry for the inverter comprises: a battery, and the battery positive and negative ends are connected between the inverter and connected to the load;

[0017] 所述逆变器用于在与所述负载的两端连通后,且所述市电电网通电时,将所述市电电网的交流电转化为直流电,以使所述电池充电储能或将所述电池的直流电转换为交流电,以给所述负载供电;所述逆变器还用于在与所述负载的两端连通后,且在所述市电电网断电的同时,与所述市电电网断开,并将所述电池的直流电转换为交流电给所述负载供电。 [0017] In the inverter for communicating with the ends of the load and the mains power grid, the conversion of the AC electricity grid to DC power to charge the battery or accumulator converting the direct current battery to AC power to supply to the load; the inverter is further configured to communicate with the rear ends of the load, and at the same time the utility grid outages, and the said utility grid is disconnected, the battery and DC to AC power to the load.

[0018] 可选的,所述零切换电路还包括:串联在所述逆变器与所述负载的连接线上的第二开关,用于在所述逆变器跟踪上所述市电电网输入的频率、相位和电压幅值后闭合,以使所述逆变器与所述负载连通,并在给所述负载供电时发出所述负载所需的谐波电流和无功电流,使得所述市电电网向所述负载提供有功电流。 [0018] Optionally, the zero switch circuit further comprises: a second switch connected in series with the inverter connected to the load line for the inverter on the electricity grid tracks input frequency, the phase and amplitude of the voltage closed, so that the inverter is in communication with the load, and emits a harmonic current and reactive load current required when the power supply to the load, such that said utility grid provides active current to the load.

[0019] 第二方面,本申请实施例还提供了一种逆变器和市电零切换方法,应用于如上述第一方面所述的逆变器和市电零切换电路中,所述零切换方法包括步骤: [0019] a second aspect, the present application further provides an inverter and a mains zero switching method is applied according to the first aspect of the mains inverter and a switching circuit as a zero, the zero handover method comprising the steps of:

[0020] S1、当市电电网通电,且需要通过所述市电电网为负载供电时,连通所述市电电网和脉冲变压器,以在所述市电电网正半周供电时向第一晶闸管提供正触发脉冲,使所述第一晶闸管导通,以及在所述市电电网负半周供电时向第二晶闸管提供正触发脉冲,使所述第二晶闸管导通,进而导通所述市电电网与所述负载,使得所述负载在所述市电电网供电的过程中获得完整的供电正弦波; [0020] S1, when the mains power, and the need to load the mains power supply, the mains and communicating the pulse transformer, the power supply to the electricity grid in the positive half cycle to provide first thyristor positive trigger pulse, the first thyristor, and to provide said second thyristor in the negative mains half cycle power supply positive trigger pulse, the second thyristor is turned on, thereby connecting the electricity grid and the load such that the load of the power supply during the mains supply in a complete sine wave;

[0021] S2、控制开启逆变器供电子电路的逆变器,以使所述逆变器跟踪所述市电电网向所述负载输入的供电信号的频率、相位和电压幅值; [0021] S2, controlling the opening of the inverter electronic circuit for the inverter, so that the inverter frequency tracking, phase and amplitude of the voltage signal of the power supply to the load the mains input;

[0022] S3、在所述逆变器跟踪上所述市电电网,并获得所述频率、相位和电压幅值时,连通所述逆变器和所述负载; [0022] S3, the tracking of the electricity grid in the inverter, and obtaining the frequency, phase and voltage magnitude, the inverter and the communication load;

[0023] S4、当所述市电电网断电时,关断所述第一晶闸管和所述第二晶闸管,使得所述逆变器供电子电路与所述市电电网断开,同时通过所述逆变器供电子电路继续为所述负载供电。 [0023] S4, when the mains power grid, the first turn-off thyristor and said second thyristor, so that the inverter is disconnected from the electronic circuit for the electricity grid, through the said electronic circuitry for the inverter continues to power the load.

[0024] 可选的,在所述步骤S3之后,且所述步骤S4之前,所述零切换方法还包括步骤: [0024] Optionally, after the step S3, the S4 and before the step, the handover method further comprising the step of zero:

[0025] S5、在所述逆变器和所述负载连通后,通过所述逆变器将所述市电电网的交流电转换为直流电,以使所述逆变器供电子电路的电池充电储能。 [0025] S5, after the inverter and the load in communication, via the inverter converts the alternating current into direct current electricity grid, so that the inverter for charging the storage battery of the electronic circuit can.

[0026] 可选的,在所述步骤S3之后,且所述步骤S4之前,所述零切换方法还包括步骤: [0026] Optionally, after the step S3, the S4 and before the step, the handover method further comprising the step of zero:

[0027] S6、在所述逆变器和所述负载连通后,通过所述市电电网和所述逆变器供电子电路共同给所述负载供电; [0027] S6, after the inverter and the load in communication, through the mains supply and the inverter power supply common electronic circuit powering the load;

[0028] S7、控制所述逆变器向所述负载提供所述负载所需的谐波电流和无功电流,以使所述市电电网向所述负载输入有功电流。 [0028] S7, controlling the inverter to provide reactive current and harmonic current required for the load to the load, such that the active current mains power input to the load.

[0029]本申请实施例中提供的一个或多个技术方案,至少具有如下技术效果或优点: [0030]由于在本申请实施例中,逆变器和市电零切换电路包括:串联于市电电网和负载的连接线路中、且相互反向并联的第一晶闸管和第二晶闸管,输入端与所述市电电网的零线和火线相连且输出端与所述第一晶闸管和所述第二晶闸管相连的脉冲变压器,以及连接于所述负载的两端之间的逆变器供电子电路。 [0029] The present application to one or more technical solutions provided in the embodiments, having at least the following technical effects or advantages: [0030] Since the embodiment of the present application embodiment, inverter and mains zero switching circuit comprising: a series in the city and a load connecting line in the electricity grid, and mutually antiparallel thyristors of the first and second thyristor, the zero power line input terminal electrically connected to the live wire and the city and the output terminal of the first thyristor and said second pulse transformer is connected to two thyristors, and an inverter connected to between both ends of the load for the electronic circuit. 其中,第一晶闸管和第二晶闸管用于在所述市电电网通电时导通,以连通市电电网和负载,使得市电电网为负载供电,以及用于在市电电网断电时断开市电电网和所述负载;脉冲变压器用于在市电电网正半周供电时向第一晶闸管提供正触发脉冲,以使第一晶闸管导通,以及在市电电网负半周供电时向第二晶闸管提供正触发脉冲,以使第二晶闸管导通,进而导通市电电网与负载,使得述负载在市电电网供电的过程中获得完整的供电正弦波;逆变器供电子电路用于在与负载的两端导通后,且市电电网通电时,与市电电网连通并充电储能或给负载供电,还用于在与负载的两端导通后,且在市电电网断电的同时与市电电网断开,并给负载供电。 Wherein the first thyristor and said second thyristor for the mains power is turned on, to communicate the mains and the load, so that the mains supply, and means for disconnecting the mains power grid load the mains and the load; pulse transformer for providing a first thyristor in the positive half cycle the positive power supply mains trigger pulse, so that the first thyristor, and the second thyristor in the negative mains half cycle of power supply providing a positive trigger pulse, so that the second thyristor, thereby connecting the mains and the load, said load such that a complete sine wave power supply during the electricity grid; and inverter circuit used in the electron donor after both ends of the conductive load, and when the mains power, communication with the electricity grid and an energy storage or charge to power the load, and the rear ends for further turned load and off in the electricity grid while disconnected from the electricity grid, and power to the load. 也就是说,通过逆变器供电电路和市电电网协同为负载供电,在市电电网突然中断时,断开市电电网和逆变器供电电路,无缝接替市电电网持续为负载供电,有效地解决了现有技术中在逆变器和市电电网切换为负载供电,且市电突然中断时,逆变器电流会倒送入市电电网中,使得负载供电中断的技术问题,实现了在市电电网突然断电时,防止逆变器输出功率倒送入市电电网,且逆变器持续为负载供电的技术效果。 In other words, the inverter circuit and the mains power supply cooperative to supply the load, when the sudden interruption of the mains, disconnect the mains power supply and an inverter circuit, seamlessly take over the electricity grid continued to supply the load, effectively solves the prior art when switching between the inverter and the electricity grid to supply the load, and the sudden interruption of electricity, the inverter current will fall into the electricity grid, so that the load interruption of technical problems and achieve a sudden power failure in the electricity grid, to prevent the inverter output power back into the electricity grid, and the inverter continue to power the load for the technical effect.

附图说明 BRIEF DESCRIPTION

[0031]为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作间单地介绍,显而易见地,下面描述中的附图仅仅是本发明的实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据提供的附图获得其他的附图。 [0031] In order to more clearly illustrate the technical solutions in the embodiments or the prior art embodiment of the present invention, the following embodiments will be described to the accompanying drawings for a single room or the prior art describing the required Apparently, the description below the drawings are merely embodiments of the present invention, those of ordinary skill in the art is concerned, without creative efforts, can derive other drawings from the accompanying drawings provided.

[0032] 图1为背景技术提供的一种逆变器和市电切换电路原理图; [0032] Figure 1 is an inverter and a switching circuit diagram of a mains BACKGROUND provided;

[0033] 图2为本申请实施例提供的第一种逆变器和市电零切换电路结构图; [0033] Figure 2 provides a first inverter and a mains zero switching circuit configuration diagram of embodiments of the present application;

[0034] 图3为本申请实施例提供的第二种逆变器和市电零切换电路结构图; [0034] FIG. 3 provides a second embodiment of the present application and the inverter mains zero switching circuit configuration diagram of embodiment;

[0035] 图4为本申请实施例提供的第一种逆变器和市电零切换方法流程图; [0035] FIG 4 provides a flow diagram of a first embodiment of an inverter and a mains zero switching method of the present application;

[0036] 图5为本申请实施例提供的第二种逆变器和市电零切换方法流程图; [0036] FIG 5 is a flowchart of a second inverter and mains zero switching method according to the present application;

[0037] 图6为本申请实施例提供的第三种逆变器和市电零切换方法流程图。 [0037] The flowchart of FIG 6 a third inverter and a mains zero handover method according to an embodiment of the present application.

具体实施方式 detailed description

[0038] 本申请实施例通过提供一种逆变器和市电零切换电路,解决了现有技术中在逆变器和市电电网切换为负载供电,且市电突然中断时,逆变器电流会倒送入市电电网中,使得负载供电中断的技术问题,实现了逆变器和市电电网协同为负载供电,在市电电网突然中断时,断开市电电网和逆变器供电电路,防止逆变器输出功率倒送入市电电网,且逆变器供电电路无缝接替市电电网持续为负载供电的技术效果。 Example [0038] The present application by providing an inverter switching circuit and a mains zero, to solve the prior art and the inverter when switching the mains to supply the load, and the electricity is suddenly interrupted, the inverter current will fall into the electricity grid in such a technical issue load interruption, to achieve the inverter and the electricity grid collaborative supply the load when a sudden interruption of the mains, disconnect the mains power supply and inverter circuit to prevent the inverter output power back into the electricity grid, and the inverter power supply circuit seamlessly take over the electricity grid continued technical effect of load power is.

[0039] 本申请实施例的技术方案为解决上述技术问题,总体思路如下: [0039] The technical solutions of embodiments of the present application to solve the above problems, the general idea is as follows:

[0040] 本申请实施例提供了一种逆变器和市电零切换电路,用于为负载不间断供电,所述零切换电路包括:串联于市电电网和所述负载的连接线路中,且相互反向并联的第一晶闸管和第二晶闸管,用于在所述市电电网通电时导通,以连通所述市电电网和所述负载,使得所述市电电网为所述负载供电,以及用于在所述市电电网断电时断开所述市电电网和所述负载;输入端与所述市电电网的零线和火线相连,输出端与所述第一晶闸管和所述第二晶闸管相连的脉冲变压器,用于在所述市电电网正半周供电时向所述第一晶闸管提供正触发脉冲,以使所述第一晶闸管导通,以及在所述市电电网负半周供电时向所述第二晶闸管提供正触发脉冲,以使所述第二晶闸管导通;连接于所述负载的两端之间的逆变器供电子电路,用于在与所述负载的两端连通后,且所述市 Embodiment [0040] The present application provides an inverter switching circuit and a mains zero, uninterruptible power supply for a load, the zero switch circuit comprising: a series to the load and the mains connection line, a first and mutually antiparallel thyristors and a second thyristor for turning on when the utility grid power to the electricity grid and communicating the load, such that the utility grid to said load and means for disconnecting the utility grid and the load when the utility grid power failure; and an input terminal connected to the neutral of the mains electricity grid and FireWire, the output of the first thyristor and a second pulse transformer is connected to said thyristor for supplying to said first thyristor when the positive half cycle of the mains power supply to the positive trigger pulse, so that the first thyristor, and the negative electricity grid providing the second half cycle when the thyristor power supply positive trigger pulse, so that the second thyristor; between both ends of the inverter connected to the load for an electronic circuit for the load with after the communication ends, and the city 电网通电时,与所述市电电网连通并充电储能或给所述负载供电,还用于在与所述负载的两端连通后,且在所述市电电网断电的同时,与所述市电电网断开,并给所述负载供电。 When the power grid while the communication with the electricity grid and an energy storage or charging power to the load, further configured to communicate with the ends of the load, and power off the electricity grid, and the said disconnect the mains and to the load.

[0041] 可见,在本申请实施例中,通过逆变器供电电路和市电电网协同为负载供电,在市电电网突然中断时,断开市电电网和逆变器供电电路,无缝接替市电电网持续为负载供电, 有效地解决了现有技术中在逆变器和市电电网切换为负载供电,且市电突然中断时,逆变器电流会倒送入市电电网中,使得负载供电中断的技术问题,实现了在市电电网突然断电时,防止逆变器输出功率倒送入市电电网,且逆变器持续为负载供电的技术效果。 [0041] visible, in the present application embodiment, the power supply circuit and the inverter by the mains synergistic supplying a load, a sudden interruption in the electricity grid, disconnecting the mains power supply and the inverter circuit, seamless succeed the electricity grid continued to supply the load, effectively solves the prior art when switching between the inverter and the electricity grid to supply the load, and the sudden interruption of electricity, the inverter current will fall into the electricity grid, making technical problems interrupted power supply load, achieved when a sudden power utility grid, to prevent the inverter output power back into the electricity grid, and the inverter continue to power the load for the technical effect.

[0042]为了更好的理解上述技术方案,下面将结合说明书附图以及具体的实施方式对上述技术方案进行详细的说明,应当理解本申请实施例以及实施例中的具体特征是对本申请技术方案的详细的说明,而不是对本申请技术方案的限定,在不冲突的情况下,本申请实施例以及实施例中的技术特征可以相互组合。 [0042] For a better understanding of the above technical solutions, in conjunction with the following drawings and specific embodiments of the above technical solutions described in detail, it should be understood that the present application specific embodiments and features of embodiments of the present application is the technical solution detailed description, but not limiting aspect of the present application, in the case of no conflict, the present application embodiments and features of the embodiments may be combined with each other.

[0043] 实施例一 [0043] Example a

[0044] 请参考图2,本申请实施例提供了一种逆变器和市电零切换电路,用于为负载不间断供电,所述零切换电路包括: [0044] Please refer to FIG 2, the application of the present embodiment provides an inverter switching circuit and a mains zero, uninterruptible power supply for a load, the zero switch circuit comprises:

[0045]串联于市电电网和所述负载的连接线路中,且相互反向并联的第一晶闸管11和第二晶闸管12,用于在所述市电电网通电时导通,以连通所述市电电网和所述负载,使得所述市电电网为所述负载供电,以及用于在所述市电电网断电时断开所述市电电网和所述负载; [0045] connected in series with the load and the mains connection line, and mutually antiparallel thyristors of the first 11 and the second thyristor 12 for switching on the mains when the power to the communication the mains and the load, such that the utility grid to power the load, and means for disconnecting the utility grid and the load when the utility power grid outage;

[0046] 输入端与所述市电电网的零线N和火线L相连,输出端与第一晶闸管11和第二晶闸管12相连的脉冲变压器2,用于在所述市电电网正半周供电时向第一晶闸管11提供正触发脉冲,以使第一晶闸管11导通,以及在所述市电电网负半周供电时向第二晶闸管12提供正触发脉冲,以使第二晶闸管12导通; [0046] the zero line and the input terminal N of the mains and the live wire L connected to the output terminal of the first pulse transformer and the thyristor 11 is connected to a second thyristor 122, for the positive half cycle of the mains supply during providing a first positive trigger pulse thyristor 11, so that the thyristor 11 is turned on first, and providing negative when the mains power supply to the second half cycle the positive trigger pulse thyristor 12, so that the second thyristor 12 is turned on;

[0047]连接于所述负载的两端之间的逆变器供电子电路3,用于在与所述负载的两端连通后,且所述市电电网通电时,与所述市电电网连通并充电储能或给所述负载供电,还用于在与所述负载的两端连通后,且在所述市电电网断电的同时,与所述市电电网断开,并给所述负载供电。 When [0047] the inverter is connected to between both ends of the load for the electronic circuit 3 for communication with the rear ends of the load and the mains power grid, and the electricity grid and communication charge or energy storage to the load, further configured to communicate with the rear ends of the load, and at the same time the mains power failure, disconnect the electricity grid and to the said load.

[0048] 具体的,请参考图3,脉冲变压器2的输入端包括:与火线L连接的第一输入端子21 和与零线N连接的第二输入端子22; [0048] Specifically, referring to FIG 3, an input terminal of the pulse transformer 2 comprises: a first input terminal 21 and a second input terminal connected to the neutral wire N is connected to the live wire L 22;

[0049]所述零切换电路还包括:串联在第一输入端子21和火线L的连接线上的第一开关4,用于在所述市电电网通电时闭合,以使脉冲变压器2通电工作,在所述市电电网正半周供电时向第一晶闸管11提供正触发脉冲,在所述市电电网负半周供电时向第二晶闸管12提供正触发脉冲。 [0049] The zero switch circuit further comprises: a first input terminal 21 in series and a first switching power work 2 L 4 Firewire connection line for when the utility grid power is closed, so that the pulse transformer , providing a first thyristor 11 in the positive half cycle of the mains power grid positive trigger pulse, the trigger pulse is provided when the positive mains half cycle of the negative power supply 12 to the second thyristor.

[0050]仍请参考图3,在本方案的一种具体实施方式中,脉冲变压器2包括:铁芯23,缠绕在铁芯23上的初级线圈24、第一次级线圈25和第二次级线圈26;初级线圈24包括第一输入端子21和第二输入端子22;第一次级线圈25包括与第一晶闸管11和第二晶闸管12连接的第一输出端子251和第二输出端子252;第二次级线圈26包括与第一晶闸管11和第二晶闸管! 2 连接的第三输出端子261和第四输出端子262;其中,第一输入端子21与第二输出端子252和第三输出端子2M为同名端,第二输入端子22与第一输出端子251和第四输出端子262为同名端;脉冲变压器2的工作原理为利用铁心23的磁耦合性能把输入的电网正弦波电压变成同步的类似正弦的触发波形,以用于在所述市电电网正半周供电时,第二输出端子252和第三输出端子261获得正输出,以使第一晶闸管11承受正电压,并获得正触发脉冲,以及 [0050] Still referring to FIG 3, in a specific embodiment of the present embodiment, the pulse transformer 2 comprising: a core 23, wound around the core 23 of the primary winding 24, secondary winding 25 of the first and second coil 26; a primary coil 24 comprises a first input terminal 21 and a second input terminal 22; a first secondary winding 25 comprises a first thyristor 11 and the first output terminal 251 and the second thyristor 12 is connected to the second output terminal 252 ;! second secondary winding 26 comprises a first thyristor 11 and the thyristor 2 of the second output terminal 261 connected to the third and fourth output terminal 262; wherein the first input terminal 21 and the second output terminal and a third output 252 2M dotted terminals terminal, a second input terminal 22 and the first output terminal 251 and fourth output terminal 262 are dotted terminals; works using the pulse transformer 2 is magnetically coupled to the performance of the core 23 becomes the input voltage sine wave power similar trigger synchronous sinusoidal waveform for the positive half cycle of the mains power supply, the second output terminal 252 and the third output terminal 261 to obtain a positive output, so that the first thyristor 11 receiving a positive voltage, and to obtain a positive trigger pulse, and 在所述市电电网负半周供电时,第一输出端子251和第四输出端子262获得正输出,以使第二晶闸管12承受正电压,并获得正触发脉冲。 When the negative mains half cycle power supply, the first output terminal 251 and fourth output terminal 262 to obtain a positive output, so that the second thyristor 12 receiving a positive voltage, and obtaining a positive trigger pulse.

[0051]图3所示的脉冲变压器2与第一晶闸管11和第二晶闸管12的连接关系为:第二晶闸管12的阴极与火线L相连,第二晶闸管I2的阳极与负载相连、还与第二次级线圈26的第四输出端子262相连,第二晶闸管12的控制极依次通过电阻R1和二极管D1与第一次级线圈25的第一输出端子251相连、还通过电阻R3与第一次级线圈25的第二输出端子252相连;第一晶闸管11的阳极与第二晶闸管12的阴极相连、还与第二输出端子25 2相连;第一晶闸管〖丨的阴极与第二晶闸管12的阳极相连,第一晶闸管11的控制极依次通过电阻R2和二极管D2与第二次级线圈26的第三输出端子261相连、还通过电阻R4与第二次级线圈26的第四输出端子262 相连。 2 thyristor 11 is connected to the first relation [0051] As shown in FIG. 3 and the second pulse transformer 12 the thyristor is: the cathode of the second thyristor 12 is connected to the live wire L, connected to the anode of the second thyristor I2 load, also the first two fourth output terminal 262 of the secondary winding 26 is connected to the control electrode of the second thyristor 12 sequentially resistor R1 and the diode D1 251 is connected to the first output terminal of the first secondary winding 25 to pass through the resistor R3 and the first the second coil 252 is connected to the output terminal 25; a cathode connected to the anode of a first thyristor 11 and the second thyristor 12 is further connected to the second output terminal 252; 〖Shu first thyristor anode-cathode of the second thyristor 12 is connected to the thyristor control 11 of the first electrode 261 are sequentially connected through the resistor R2 and the diode D2 and the third output terminal of the second coil 26, 262 is also connected to the fourth output terminal of the second coil 26 via a resistor R4.

[0052]仍请参考图3,在同一具体实施方式中,逆变器供电子电路3包括:电池31,以及与电池31正负极相连且连接于所述负载的两端之间的逆变器32 (即DC/AC,直流-交流转换器);逆变器32用于在与所述负载的两端连通后,且所述市电电网通电时,将所述市电电网的交流电转化为直流电,以使电池充电储能或将电池的直流电转换为交流电,以给所述负载供电;逆变器32还用于在与所述负载的两端连通后,且在所述市电电网断电的同时, 与所述市电电网断开,并将电池31的直流电转换为交流电给所述负载供电。 [0052] Still referring to FIG. 3, the same particular embodiment, the electronic circuit 3 for inverter comprising: a battery 31, and a battery 31 is connected to the positive and negative ends of the load connected between the inverter 32 (i.e., DC / AC, DC - AC converter); an inverter 32 for communicating with the rear ends of the load and the mains power grid, the utility grid AC power conversion direct current to charge the battery or storage battery DC to AC for powering the load; inverter 32 is further configured to communicate with the rear ends of the load and the utility grid while powered off, disconnected from the electricity grid, the battery 31 converts the DC power to AC power to the load. 进一步,为了能够灵活地控制逆变器32与所述负载的电网供电回路连通,所述零切换电路还包括:串联在逆变器32与所述负载的连接线上的第二开关5,用于在逆变器32跟踪上所述市电电网输入的频率、相位和电压幅值后闭合,以使逆变器32与所述负载连通,并在给所述负载供电时发出所述负载所需的谐波电流和无功电流,使得所述市电电网向所述负载提供有功电流 Further, in order to flexibly control the inverter 32 in communication with the power supply circuit of the load, the zero switching circuit further comprises: a second switch connected in series with the 5 inverter 32 is connected to the load line, with on the track 32 to the inverter input of the mains frequency, phase and voltage amplitude after closing, so that the inverter 32 in communication with the load, and issues the load when the power supply to the load harmonic current and reactive current demand, so that the utility grid provides active current to the load

[0053] 图3所示具体实施方案的工作原理为:当市电电网通电,且需要通过所述市电电网为负载供电时,控制第一开关4闭合,在所述市电电网输出的电压处于正弦波的正半周时, 第一晶闸管11承受正电压,脉冲变压器2的第一输入端子21和第二输入端子22得到电压,且第一输入端子21为正电压、第二输入端子22为负电压,在第一输入端子21的同名端第三输出端子261和第二输出端在252得到正输出,第一晶闸管11承受正电压,并得到正触发脉冲而开通;在所述市电电网输出的电压处于正弦波的负半周时,第二晶闸管12承受正电压,脉冲变压器2的第二输入端子22和第一输入端子21得到电压,且第二输入端子22为正电压、第一输入端子21为负电压,在第二输入端子22的同名端第一输出端子251和第四输出端子262 得到正输出,第二晶闸管12承受正电压,并得到正触发脉冲而 [0053] FIG principle of the specific embodiments as shown in Figure 3: When the mains power, and power required for the load, controlled by said first switch the mains 4 is closed, the voltage at the output of the utility grid when the sine wave in the positive half cycle, thyristor 11 receiving a first positive voltage, a first input terminal 21 of the pulse transformer 2 and the second voltage input terminal 22 to obtain, and the first input terminal 21 is a positive voltage, a second input terminal 22 negative voltage, the first input terminal 21 of the dot end of third output terminal 261 and second output terminal 252 to obtain a positive output, receiving a first positive voltage thyristor 11, and opened to obtain a positive trigger pulse; said electric utility grid when a sine wave voltage output in the negative half cycle, the second thyristor 12 receiving a positive voltage, a second input 22 of the pulse transformer 2 and the first input terminal of the terminal voltage obtained 21, and the second input terminal 22 is a positive voltage, a first input a negative voltage terminal 21, the dot end of the second input terminal 22 of the first output terminal 251 and fourth output terminal 262 to give a positive output, a second thyristor 12 receiving a positive voltage, and to obtain a positive trigger pulse 通;最终所述负载可得到完整的正弦波电压。 Pass; the ultimate load is obtained a complete sine wave voltage. 进一步,为了避免由于晶闸管只能控制开通,它的关断只能等到流过的电流过零或对其施加反压才能使晶闸管关闭,导致不能做到零切换的缺陷,配合以逆变器供电子电路3—起为所述负载供电,具体的,在所述市电电网正常供电时,开启逆变器32,让逆变器32跟踪所述市电电网向所述负载输入的供电信号的频率、相位和电压幅值,在所述逆变器32跟踪上所述市电电网,并获得所述频率、相位和电压幅值时,闭合第二开关5,让逆变器32和所述市电电网共同给所述负载供电,控制逆变器32提供的所述负载需要的谐波电流和无功电流,使得所述市电电网只需向所述负载输入有功电流,这样流过第一晶闸管11或第二晶闸管12的电流就与所述负载的输入电压同相位,因此在任何情况下,当所述市电电网输入断电时,流过第一晶闸管11和第二晶闸管12的电流就立即过零 Further, since the thyristor can only be controlled in order to avoid the opening, it can only be turned off until the current flowing through the zero back pressure applied thereto or to make the thyristor off, resulting in zero switching defect can not do, in order to cooperate for the inverter 3- from the electronic circuit to said load, specifically, when the normal power supply to the utility grid, the inverter 32 is turned on, the inverter 32 so that the tracking signal of the utility grid power supply to the load input frequency, phase and amplitude of the voltage on the inverter 32 to track the utility grid, and obtaining the frequency, phase and voltage amplitude, the second switch 5 is closed, so that the inverter 32 and common to the mains power supply to the load, the inverter 32 controls the current harmonic and reactive current supplied to the load required, so that the only the mains input current to the active load, so that flow through the first a second current thyristor 12 or the thyristor 11 on the same phase as the input voltage of the load, so in any case, when the utility grid input power, thyristor 11 flows through a first and a second thyristor 12 current zero-crossing immediately 而关断,从而防止逆变器32的输出功率倒送入电网,进而避免了所述负载供电间断,实现了所述市电电网和逆变器32在任何情况下都能零切换为所述负载供电。 Is turned off, thereby preventing the output power of the inverter 32 is inverted into the power grid, thereby avoiding interruption of the power supply to the load, to achieve the electricity grid and the inverter 32 can be switched to zero in any case the load.

[0054] 当然,在具体实施过程中,在逆变器32和所述负载连通后,还可通过逆变器32将所述市电电网的交流电转换为直流电,以为逆变器供电子电路3的电池31充电。 [0054] Of course, the specific implementation process, after the inverter 32 and the load in communication, through the inverter 32 may convert the alternating current into direct current electricity grid, that the electronic circuit for the inverter 3 the battery 31 is charged.

[0055] 需要注意的是,在本申请实施例中是利用脉冲变压器2驱动第一晶闸管11和第二晶闸管12在市电电网正半周或负半周供电时分别向第一晶闸管11或第二晶闸管12提供正触发脉冲,以使第一晶闸管11或第二晶闸管12导通,且当所述市电电网输入断电时,正的触发脉冲自动停止。 [0055] It is noted that in the present embodiment is application to the first or the second thyristor thyristor 11, respectively, the positive half cycle or negative half cycle of the driving power supply 2 by the pulse transformer 11 and a first thyristor thyristor 12 in the second electricity grid 12 provides a positive trigger pulse, so that the first 11 or the second thyristor thyristor 12 is turned on, and when the input mains power grid, the positive trigger pulse is automatically stopped. 在其它实施方式中,还可通过电子线路,采用高频脉冲形式,在找准主电路的过零点作为起点,向晶闸管发触发脉冲,实现准确开通的功能。 In other embodiments, the electronic circuit may also be used in the form of high frequency pulses, identify the zero crossings of the main circuit as a start point, sending a trigger pulse to the thyristors, accurate opening function.

[0056] 总而言之,在本申请实施例中,通过逆变器供电电路和市电电网协同为负载供电, 在市电电网突然中断时,断开市电电网和逆变器供电电路,无缝接替市电电网持续为负载供电,有效地解决了现有技术中在逆变器和市电电网切换为负载供电,且市电突然中断时, 逆变器电流会倒送入市电电网中,使得负载供电中断的技术问题,买现了在市电电网突然断电时,防止逆变器输出功率倒送入市电电网,且逆变器持续为负载供电的技术效果。 [0056] In summary, in the present application embodiment, the power supply circuit and the inverter by the mains synergistic supplying a load, a sudden interruption in the electricity grid, disconnecting the mains power supply and the inverter circuit, seamless succeed the electricity grid continued to supply the load, effectively solves the prior art when switching between the inverter and the electricity grid to supply the load, and the sudden interruption of electricity, the inverter current will fall into the electricity grid, making load supply technical problems interrupted, bought and a sudden power failure in the electricity grid, to prevent the inverter output power back into the electricity grid, and the inverter continue to power the load for the technical effect. 同时,逆变器还可将市电电网的交流电转换为直流电为电池充电,以为后期给负载供电做准备。 At the same time, the inverter can also convert alternating current electricity grid to DC power to charge the battery, the latter thought to power the load preparation.

[0057] 实施例二 [0057] Second Embodiment

[0058] 请参考图4,基于同一发明构思,本申请实施例还提供了一种逆变器和市电零切换方法,应用于如上述实施例一所述的逆变器和市电零切换电路中,所述零切换方法包括步骤: [0058] Please refer to FIG 4, based on the same inventive concept, the present application further provides an inverter and a mains zero switching method applied to the above-described embodiments as an inverter and a mains zero switching the circuit, the zero switching method comprising:

[0059] S1、当市电电网通电,且需要通过所述市电电网为负载供电时,连通所述市电电网和脉冲变压器2,以在所述市电电网正半周供电时向第一晶闸管11提供正触发脉冲,使所述第一晶闸管11导通,以及在所述市电电网负半周供电时向第二晶闸管12提供正触发脉冲, 使所述第二晶闸管12导通,进而导通所述市电电网与所述负载,使得所述负载在所述市电电网供电的过程中获得完整的供电正弦波; [0059] S1, when the mains power, and the need to load the mains power supply, the communication with the mains and a pulse transformer 2, when power is supplied to the electricity grid in the positive half cycle of the first thyristor 11 provides a positive trigger pulse, the thyristor 11 is turned on first, and providing a positive trigger pulse at the negative mains half cycle power supply to the second thyristor 12, the second thyristor 12 is turned on, thereby connecting the electricity grid and the load, the load is such that the supply during the mains supply in a complete sine wave;

[0060] S2、控制开启逆变器供电子电路3的逆变器32,以使所述逆变器32跟踪所述市电电网向所述负载输入的供电信号的频率、相位和电压幅值; [0060] S2, controlling the opening of the inverter circuit 3 for electronic inverter 32, inverter 32 so that the tracking of the frequency, phase and amplitude of the voltage supply to the load signal input to the electricity grid ;

[0061] S3、在所述逆变器32跟踪上所述市电电网,并获得所述频率、相位和电压幅值时, 连通所述逆变器32和所述负载; When [0061] S3, the tracking of the inverter 32 on the utility grid, and to obtain the frequency, phase and voltage amplitude, communicating the inverter 32 and the load;

[0062] S4、当所述市电电网断电时,关断所述第一晶闸管11和所述第二晶闸管12,使得所述逆变器供电子电路3与所述市电电网断开,同时通过所述逆变器供电子电路3继续为所述负载供电。 [0062] S4, when the mains power grid, the thyristor 11 turns off the first and the second thyristor 12, so that the inverter circuit 3 for electronic disconnected from the electricity grid, the electronic circuit for the same time through the inverter 3 to continue to supply the load.

[0063] 在一种具体实施方式中,在所述步骤S3之后,且所述步骤S4之前,所述零切换方法还包括步骤: [0063] In one embodiment, after the step S3, the S4 and before the step, the handover method further comprising the step of zero:

[0064] S5、在所述逆变器32和所述负载连通后,通过所述逆变器32将所述市电电网的交流电转换为直流电,以使所述逆变器供电子电路3的电池31充电储能。 [0064] S5, after the inverter 32 and the load in communication, via the inverter 32 to AC electric power into DC power of the mains, so that the electronic inverter circuit 3 for charging the storage battery 31.

[0065] 在另一种具体实施方式中,在所述步骤S3之后,且所述步骤S4之前,所述零切换方法还包括步骤: [0065] In another specific embodiment, after the step S3, the S4 and before the step, the handover method further comprising the step of zero:

[0066] S6、在所述逆变器32和所述负载连通后,通过所述市电电网和所述逆变器供电子电路3共同给所述负载供电; [0066] S6, after the inverter 32 and the load in communication, through the utility grid and the inverter electronic circuit for powering the load 3 together;

[0067] S7、控制所述逆变器32向所述负载提供所述负载所需的谐波电流和无功电流,以使所述市电电网向所述负载输入有功电流。 [0067] S7, controls the inverter 32 to provide the harmonic current and reactive current required for the load to the load, such that the active current mains power input to the load.

[0068] 根据上面的描述,上述逆变器和市电零切换方法应用于上述逆变器和市电零切换电路中,所以,该方法的一个或多个实施例与该系统的一个或多个实施例一致,在此就不再一一赘述了。 [0068] According to the above description, the inverter mains zero and the inverter switching method applied to zero and mains switching circuit, therefore, one case with the system of one or more embodiments of the method or more consistent with embodiments, this will not see them here.

[0069]尽管已描述了本发明的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例做出另外的变更和修改。 [0069] While the present invention has been described with preferred embodiments, but those skilled in the art from the underlying inventive concept can make further modifications and variations to these embodiments. 所以,所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。 Therefore, the appended claims are intended to explain embodiments including the preferred embodiment as fall within the scope of the invention and all changes and modifications.

[0070]显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。 [0070] Obviously, those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. 这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。 Thus, if these modifications and variations of the present invention fall within the claims of the invention and the scope of equivalents thereof, the present invention intends to include these modifications and variations.

Claims (7)

  1. 1.一种逆变器和市电零切换电路,用于为负载不间断供电,其特征在于,所述零切换电路包括: 串联于市电电网和所述负载的连接线路中,且相互反向并联的第一晶闸管(11)和第二晶闸管(12),用于在所述市电电网通电时导通,以连通所述市电电网和所述负载,使得所述市电电网为所述负载供电,以及用于在所述市电电网断电时断开所述市电电网和所述负载; 输入端与所述市电电网的零线和火线相连,输出端与所述第一晶闸管(11)和所述第二晶闸管(12)相连的脉冲变压器(2),用于在所述市电电网正半周供电时向所述第一晶闸管(11)提供正触发脉冲,以使所述第一晶闸管(11)导通,以及在所述市电电网负半周供电时向所述第二晶闸管(12)提供正触发脉冲,以使所述第二晶闸管(12)导通; 连接于所述负载的两端之间的逆变器供电子电路(3),用于在与所述 1. An inverter switching circuit and the electric zero-city, uninterruptible power supply for a load, characterized in that the zero switch circuit comprising: a series to the load and the mains connection line and mutually opposite the first thyristor (11) and a second thyristor (12) connected in parallel for the mains when the power is turned on, the communication to the mains and the load, such as the utility grid is said load, and means for disconnecting the mains when the mains power grid and the said load; neutral wire is connected to the input terminal of the mains electricity grid and FireWire, a first output terminal and the thyristor (11) and said second thyristor (12) of the pulse transformer (2) is connected, for the timing of the mains half cycle of the power provided to the first thyristor (11) a positive trigger pulse, so the said first thyristor (11) is turned on, and providing to said second thyristor (12) when the mains supply positive half cycle of the negative power trigger pulse, so that said second thyristor (12) is turned on; connected to the inverter between the electron donating ends of the load circuit (3) for the 载的两端连通后,且所述市电电网通电时,与所述市电电网连通并充电储能或给所述负载供电,还用于在与所述负载的两端连通后,且在所述市电电网断电的同时,与所述市电电网断开,并给所述负载供电; 所述脉冲变压器(2)的输入端包括:与所述火线连接的第一输入端子(21)和与所述零线连接的第二输入端子(22);所述脉冲变压器(2)包括:铁芯(23),缠绕在所述铁芯(23)上的初级线圈(24)、第一次级线圈(25)和第二次级线圈(26); 所述初级线圈(24)包括所述第一输入端子(21)和所述第二输入端子(22);所述第一次级线圈(25)包括与所述第一晶闸管(11)和所述第二晶闸管(12)连接的第一输出端子(251) 和第二输出端子(252);所述第二次级线圈(26)包括与所述第一晶闸管(11)和所述第二晶闸管(12)连接的第三输出端子(261)和第四输出端子(262); 其中,在所述市电电网正半周 After the communication carrier ends, and when the utility grid power, communication with the electricity grid and an energy storage or charging power to the load, but also for the communication at both ends and the load, and in the mains power grid, while the utility grid is disconnected, and power to the load; the pulse transformer (2) an input terminal comprising: a first input terminal connected to the live wire (21 ) and a second input terminal connected to the zero line (22); said pulse transformer (2) comprising: a core (23), wound around the primary coil (24) (23) of the core, of a secondary coil (25) and a second coil (26); said primary coil (24) comprises a first input terminal (21) and said second input terminal (22); the first coil (25) comprises a first output terminal of said first thyristor (11) and said second thyristor (12) connected (251) and a second output terminal (252); said second coil ( 26) comprises a third output terminal connected to the first thyristor (11) and said second thyristor (12) (261) and a fourth output terminal (262); wherein, in the positive half cycle of the mains 供电时,所述第二输出端子(252)和所述第三输出端子(261)获得正输出,以使所述第一晶闸管(11)承受正电压,并获得正触发脉冲;在所述市电电网负半周供电时,所述第一输出端子(251)和所述第四输出端子(262)获得正输出,以使所述第二晶闸管(12)承受正电压,并获得正触发脉冲。 The power supply, the second output terminal (252) and said third output terminal (261) to obtain a positive output, so that the first thyristor (11) receiving a positive voltage, and obtaining a positive trigger pulse; in the City when the negative electric power supply half cycle, the first output terminal (251) and said fourth output terminal (262) to obtain a positive output, so that said second thyristor (12) receiving a positive voltage, and obtaining a positive trigger pulse.
  2. 2. 如权利要求1所述的逆变器和市电零切换电路,其特征在于,所述零切换电路还包括:串联在所述第一输入端子(21)和所述火线的连接线上的第一开关(4),用于在所述市电电网通电时闭合,以使所述脉冲变压器⑵通电工作,在所述市电电网正半周供电时向所述第一晶闸管(id提供正触发脉冲,在所述市电电网负半周供电时向所述第二晶闸管a2)提供正触发脉冲。 2. The inverter and mains zero switching circuit according to claim 1, wherein said zero switching circuit further comprises: a first input terminal of said series (21) and said connection line FireWire a first switch (4), for closing when the utility grid is energized, so that the power pulse transformer ⑵ work, (n-ID to said first thyristor provided in the positive half cycle of the mains power supply trigger pulse is provided to the second thyristor a2) when the mains power supply negative half cycle of the grid positive trigger pulse.
  3. 3. 如权利要求1或2所述的逆变器和市电零切换电路,其特征在于,所述逆变器供电子电路(3)包括:电池(31),以及与所述电池(31)正负极相连且连接于所述负载的两端之间的逆变器(32); 所述逆变器(32)用于在与所述负载的两端连通后,且所述市电电网通电时,将所述市电电网的交流电转化为直流电,以使所述电池(31)充电储能或将所述电池(31)的直流电转换为交流电,以给所述负载供电;所述逆变器(32)还用于在与所述负载的两端连通后,且在所述市电电网断电的同时,与所述市电电网断开,并将所述电池(31)的直流电转换为交流电给所述负载供电。 3. The inverter and mains zero switching circuit according to claim 1, wherein said electron donor inverter circuit (3) comprising: a battery (31), and the battery (31 ) positive and negative inverter (32) connected between both ends of and connected to the load; the inverter (32) for communicating with the rear ends of the load and the mains when converts the DC power grid, transforming the alternating current into direct current electricity grid, so that the battery (31) charge the battery or accumulator (31) to AC power for powering the load; the an inverter (32) is further configured to communicate with the rear ends of the load, and at the same time the mains power failure, electrical power and disconnecting the mains, and a battery (31) DC to AC power to the load.
  4. 4. 如权利要求3所述的逆变器和市电零切换电路,其特征在于,所述零切换电路还包括:串联在所述逆变器(32)与所述负载的连接线上的第二开关⑸,用于在所述逆变器(32) 跟踪上所述市电电网输入的频率、相位和电压幅值后闭合,以使所述逆变器(32)与所述负载连通,并在给所述负载供电时发出所述负载所需的谐波电流和无功电流,使得所述市电电网向所述负载提供有功电流。 4. The inverter of claim 3 and a mains zero switching circuit as claimed in claim, wherein said switching circuit further comprises a zero: the series inverter (32) connected to the load line a second switch ⑸, for (32) tracking the inverter after the city frequency, phase and amplitude of the electric voltage fed to the grid is closed, so that the inverter (32) in communication with said load , and issued to said load when the load harmonic current and reactive current required, such that the utility grid provides active current to the load.
  5. 5. —种逆变器和市电零切换方法,应用于如上述权利要求1〜4任一权项所述的逆变器和市电零切换电路中,其特征在于,所述零切换方法包括步骤: 51、 当市电电网通电,且需要通过所述市电电网为负载供电时,连通所述市电电网和脉冲变压器(2),以在所述市电电网正半周供电时向第一晶闸管(11)提供正触发脉冲,使所述第一晶闸管(11)导通,以及在所述市电电网负半周供电时向第二晶闸管(12)提供正触发脉冲,使所述第二晶闸管(12)导通,进而导通所述市电电网与所述负载,使得所述负载在所述市电电网供电的过程中获得完整的供电正弦波; 52、 控制开启逆变器供电子电路(3)的逆变器(32),以使所述逆变器(32)跟踪所述市电电网向所述负载输入的供电信号的频率、相位和电压幅值; 53、 在所述逆变器(32)跟踪上所述市电电网,并获得所述频率、相位和 5. - the seed and the inverter mains zero switching method applied to the inverter and the mains zero switch circuit according to any one of the preceding Claims 1 ~ 4 of the preceding claims, wherein said zero switching method comprising the steps of: 51, when the mains power, and the need to load the mains power supply, the mains and communicating the pulse transformer (2), to the positive half cycle of the power supply when the mains to the second a thyristor (11) providing a positive trigger pulse, the first thyristor (11) is turned on, and to provide a second thyristor (12) during the negative mains half cycle power supply positive trigger pulse, the second thyristor (12) is turned on, thereby connecting the electricity grid and the load, such that the load is complete sine wave power supply during the electricity grid; 52, controlling the opening of the inverter electron donating circuit (3) an inverter (32), so that the inverter (32) track the frequency, phase and amplitude of the voltage signal of the power supply to the load the mains input; 53, the an inverter (32) tracking the utility grid, and obtaining the frequency, phase, and 电压幅值时,连通所述逆变器(32)和所述负载; 54、 当所述市电电网断电时,关断所述第一晶闸管(11)和所述第二晶闸管(12),使得所述逆变器供电子电路(3)与所述市电电网断开,同时通过所述逆变器供电子电路继续为所述负载供电。 When the voltage amplitude, the communication of the inverter (32) and the load; 54, when the mains power grid, the first turn-off thyristor (11) and said second thyristor (12) , such that the electronic circuit for the inverter (3) disconnected from the electricity grid, and through the inverter circuit continues to supply electronic power to the load.
  6. 6. 如权利要求5所述的逆变器和市电零切换方法,其特征在于,在所述步骤S3之后,且所述步骤S4之前,所述零切换方法还包括步骤: 55、 在所述逆变器(32)和所述负载连通后,通过所述逆变器(32)将所述市电电网的交流电转换为直流电,以使所述逆变器供电子电路(3)的电池(31)充电储能。 6. The inverter and mains zero handover method according to claim 5, wherein, after the step S3, the previous and the step S4, the handover method further comprising the step of zero: 55, in the later inverter (32) and the communication load via the inverter (32) converting the alternating current into direct current electricity grid, so that the electron-donor inverter circuit (3) of the battery (31) charging the energy storage.
  7. 7. 如权利要求5所述的逆变器和市电零切换方法,其特征在于,在所述步骤S3之后,且所述步骤S4之前,所述零切换方法还包括步骤: 56、 在所述逆变器(32)和所述负载连通后,通过所述市电电网和所述逆变器供电子电路⑶共同给所述负载供电; 57、 控制所述逆变器(3¾向所述负载提供所述负载所需的谐波电流和无功电流,以使所述市电电网向所述负载输入有功电流。 7. The inverter and mains zero handover method according to claim 5, wherein, after the step S3, the previous and the step S4, the handover method further comprising the step of zero: 56, in the later inverter (32) and the communication load for the electricity grid by the inverter and a common electronic circuit to said load ⑶; 57, controls the inverter (3¾ to the the load harmonic current and reactive current required for the load, so that the mains power input current to the active load.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514171A1 (en) * 1991-05-17 1992-11-19 Best Power Technology, Inc. Back-up uninterruptible power system
CN1754294A (en) * 2003-02-25 2006-03-29 伊顿动力品质公司 Uninterruptible power supplies with converter operation conditioned upon static switch communication and method of operation thereof
CN204794322U (en) * 2015-06-01 2015-11-18 深圳市盛弘电气股份有限公司 Dc -to -ac converter and municipality's electrical zero switching circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514171A1 (en) * 1991-05-17 1992-11-19 Best Power Technology, Inc. Back-up uninterruptible power system
CN1754294A (en) * 2003-02-25 2006-03-29 伊顿动力品质公司 Uninterruptible power supplies with converter operation conditioned upon static switch communication and method of operation thereof
CN204794322U (en) * 2015-06-01 2015-11-18 深圳市盛弘电气股份有限公司 Dc -to -ac converter and municipality's electrical zero switching circuit

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