CN106026683A - Energy router topology structure realizing distributed power supply integration - Google Patents
Energy router topology structure realizing distributed power supply integration Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC
- H02M5/42—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters
- H02M5/44—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC
- H02M5/453—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
- H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
- H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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Abstract
一种实现分布式电源集成的能量路由器拓扑结构，包括输入模块、输出模块、DC/DC模块。所述基本单元模块可构成三相交流输入、三相交流和直流输出的基于共铁芯多绕组中频或者高频变压器的能量路由器，能量路由器的输入模块由3个滤波电抗器、3*n个直流电容和3*n个相互级联的H桥型整流单元构成；输出模块由个3个滤波电抗器、3个滤波电容，1个直流电容和1个三相逆变单元构成；DC/DC模块由1个共铁芯多绕组中频或者高频变压器、n个H桥型整流单元和n个H桥型逆变单元构成。本发明的路由器可方便地与可再生能源发电设备、储能设备、不同负荷相连，提高供电和用电的灵活性，能同时输出直流电和交流电，且输出电压可调，满足用户的不同需求。
An energy router topology for realizing distributed power integration, including an input module, an output module, and a DC/DC module. The basic unit module can constitute an energy router based on a common-core multi-winding intermediate frequency or high frequency transformer with three-phase AC input, three-phase AC and DC output, and the input module of the energy router consists of 3 filter reactors, 3*n It consists of DC capacitors and 3*n cascaded H-bridge rectifier units; the output module consists of 3 filter reactors, 3 filter capacitors, 1 DC capacitor and 1 three-phase inverter unit; DC/DC The module consists of a common-core multi-winding intermediate frequency or high frequency transformer, n H-bridge rectifier units and n H-bridge inverter units. The router of the present invention can be conveniently connected with renewable energy power generation equipment, energy storage equipment, and different loads, improves the flexibility of power supply and power consumption, can output direct current and alternating current at the same time, and the output voltage is adjustable to meet different needs of users.
Description
技术领域 technical field
本发明涉及电子设备技术领域，特别是涉及一种实现分布式电源集成的能量路由器拓扑结构。 The invention relates to the technical field of electronic equipment, in particular to an energy router topology for realizing the integration of distributed power sources.
背景技术 Background technique
能量路由器是一种采用电力电子器件和高频变压器，通过电力电子变换技术实现电能变换、电压转换、电力传输和电能质量治理的新型化电力装置。到目前为止，国内外研究者已经提出多种类型的能量路由器装置，这些装置有各自的优缺点。在面向分布式电源纳入的直流电网供电需求时，对装置的功能要求更高，一般的能量路由器结构变得更加复杂，可拓展性较差。 The energy router is a new type of power device that uses power electronic devices and high-frequency transformers to realize power conversion, voltage conversion, power transmission and power quality management through power electronic conversion technology. So far, researchers at home and abroad have proposed various types of energy router devices, and these devices have their own advantages and disadvantages. When facing the DC grid power supply requirements of distributed power sources, the functional requirements of the device are higher, and the general energy router structure becomes more complicated and the scalability is poor.
现有的配电网存在如下的问题，第一、配电网的网络结构和运行模式灵活性、互动性不足，不能有效利用分布式、间歇性可再生能源，也难以满足电动汽车等不确定性负荷灵活接入和有序用电。 The existing distribution network has the following problems. First, the network structure and operation mode of the distribution network are not flexible and interactive enough to effectively utilize distributed and intermittent renewable energy, and it is also difficult to meet uncertainties such as electric vehicles. Flexible load access and orderly power consumption.
第二、一次设备智能化程度不高，一二次设备融合不足，缺乏灵活的潮流调节和电压控制手段，不具有可灵活优化配置的能力，电力设备的利用率偏低。 Second, the intelligence level of primary equipment is not high, the integration of primary and secondary equipment is insufficient, there is a lack of flexible power flow regulation and voltage control means, there is no ability to flexibly optimize configuration, and the utilization rate of power equipment is low.
第三、配电网中的非线性负荷越来越多，电压瞬时跌落、电压波动、电网谐波、三相不平衡现象加剧等一系列电能质量问题。 Third, there are more and more nonlinear loads in the distribution network, and a series of power quality problems such as instantaneous voltage drop, voltage fluctuation, grid harmonics, and aggravated three-phase unbalance.
第四、电力变压器体积、重量大，变压器绝缘油会带来环境问题，不易维护，其铁磁原件的非线性特性会造成电网电压和电流畸变，产生谐波污染。 Fourth, power transformers are bulky and heavy. Transformer insulating oil will cause environmental problems and is not easy to maintain. The nonlinear characteristics of its ferromagnetic components will cause voltage and current distortion of the grid and generate harmonic pollution.
第五、电网侧或负荷侧发生故障时，不能隔离故障，导致故障范围扩 大，不具备自保护功能，需要配套的继电保护装置； Fifth, when a fault occurs on the grid side or the load side, the fault cannot be isolated, resulting in the expansion of the fault range, and it does not have a self-protection function, and a supporting relay protection device is required;
第六、无智能机构，不能实现配电网与配电网其它设备的互动。 Sixth, without an intelligent mechanism, the interaction between the distribution network and other equipment in the distribution network cannot be realized.
发明内容 Contents of the invention
本发明的目的是提供一种能同时输出直流电和交流电，且输出电压可调的实现分布式电源集成的能量路由器拓扑结构。 The purpose of the present invention is to provide an energy router topology structure capable of outputting direct current and alternating current at the same time, and the output voltage is adjustable to realize the integration of distributed power sources.
为实现上述发明目的，本发明提供的技术方案是： For realizing above-mentioned purpose of the invention, the technical scheme that the present invention provides is:
一种实现分布式电源集成的能量路由器拓扑结构，所述路由器包括整流器、变换器和逆变器，每相具有n组级联的H桥型PWM整流器在输入侧，DC/DC变换器和1组三相PWM逆变器在输出侧；在每一相内，所述n组级联的PWM整流器交流侧联结交流电网的一相，所述n组级联的PWM整流器直流侧经n组电容连接所述DC/DC变换器；所述DC/DC变换器的直流输出侧经过并联输出直流电压，同时通过三相逆变实现三相交流输出。 An energy router topology for distributed power integration, the router includes rectifiers, converters and inverters, each phase has n groups of cascaded H-bridge PWM rectifiers on the input side, DC/DC converters and 1 A group of three-phase PWM inverters is on the output side; in each phase, the AC side of the n groups of cascaded PWM rectifiers is connected to one phase of the AC power grid, and the DC side of the n groups of cascaded PWM rectifiers is passed through n groups of capacitors The DC/DC converter is connected; the DC output side of the DC/DC converter is connected in parallel to output a DC voltage, and at the same time realizes a three-phase AC output through a three-phase inverter.
进一步地，输入侧电网的A、B、C三相分别经过滤波电抗器1a、1b、1c连接于整流单元1ra、1rb、1rc的桥臂中性点a1a，a2b，a2c； Further, the three phases A, B, and C of the power grid on the input side are respectively connected to the neutral points a1a, a2b, and a2c of the bridge arms of the rectifier units 1ra, 1rb, and 1rc through filter reactors 1a, 1b, and 1c;
输入侧电网的A相经过滤波电抗1a连接于整流单元1a的桥臂1中性点a1a，整流单元1ra的桥臂2中性点b1a连接于整流单元2ra的桥臂1中性点a2a，依次循环往复连接，整流单元nra的桥臂2中性点bna输出，每组整流单元的输出侧并联均压电容C1a，C2a，……Can； Phase A of the input side power grid is connected to the neutral point a1a of the bridge arm 1 of the rectification unit 1a through the filter reactance 1a, and the neutral point b1a of the bridge arm 2 of the rectification unit 1ra is connected to the neutral point a2a of the bridge arm 1 of the rectification unit 2ra, in turn Reciprocating connection, bridge arm 2 neutral point bna output of the rectifier unit nra, parallel voltage equalizing capacitors C1a, C2a, ... Can on the output side of each rectifier unit;
输入侧电网的B相经过滤波电抗1b连接于整流单元1b的桥臂1中性点a1b，整流单元1rb的桥臂2中性点b1b连接于整流单元2rb的桥臂1中性点a2b，依次循环往复连接，整流单元nrb的桥臂2中性点bnb输出，每组整流单元的输出侧并联均压电容C1b，C2b，……Cnb； The B-phase of the input side grid is connected to the neutral point a1b of the bridge arm 1 of the rectification unit 1b through the filter reactance 1b, and the neutral point b1b of the bridge arm 2 of the rectification unit 1rb is connected to the neutral point a2b of the bridge arm 1 of the rectification unit 2rb, in turn Reciprocating connection, bridge arm 2 neutral point bnb output of rectifier unit nrb, voltage equalizing capacitors C1b, C2b, ... Cnb connected in parallel on the output side of each rectifier unit;
输入侧电网的C相经过滤波电抗1c连接于整流单元1c的桥臂1中性点a1c，整流单元1rc的桥臂2中性点b1c连接于整流单元2rc的桥臂1中性点a2c，依次循环往复连接，整流单元nrc的桥臂2中性点bnc输出， 每组整流单元的输出侧并联均压电容C1c，C2c，……Cnc； Phase C of the input side power grid is connected to the neutral point a1c of the bridge arm 1 of the rectification unit 1c through the filter reactance 1c, and the neutral point b1c of the bridge arm 2 of the rectification unit 1rc is connected to the neutral point a2c of the bridge arm 1 of the rectification unit 2rc, in turn Reciprocating connection, the bridge arm 2 neutral point bnc output of the rectifier unit nrc, the output side of each rectifier unit is connected in parallel with equalizing capacitors C1c, C2c, ... Cnc;
整流单元nra、nrb、nrc的桥臂2中性点bna、bnb、bnc以Y型方式连接。 The neutral points bna, bnb, and bnc of bridge arms 2 of the rectifier units nra, nrb, and nrc are connected in a Y-shape.
进一步地，所述每相DC/DC模块包括n组H桥逆变单元、共铁芯多绕组中高频变压器和n组H桥整流单元，所述n组逆变单元的直流侧与所述输入侧级联的n组H桥单元直流侧相连接，所述n组逆变单元的交流侧连接所述中高频变压器的n个原边绕组，所述n组整流单元的交流侧连接所述多绕组变压器的n个副边绕组，所述n组整流单元的直流侧通过并联经过直流电容Co后与输出侧连接。 Further, the DC/DC module for each phase includes n sets of H-bridge inverter units, a common-core multi-winding medium-high frequency transformer, and n sets of H-bridge rectifier units, and the DC side of the n sets of inverter units is connected to the input The n groups of H-bridge units cascaded on the side are connected to the DC side, the AC sides of the n groups of inverter units are connected to the n primary windings of the medium and high frequency transformer, and the AC sides of the n groups of rectifier units are connected to the multiple For the n secondary windings of the winding transformer, the DC sides of the n sets of rectifying units are connected in parallel to the output side after passing through the DC capacitor Co.
进一步地，输入侧电网的a相经过滤波电抗Lao连接于三相PWM逆变单元VSI的桥臂1中性点ao，输入侧电网的b相经过滤波电抗Lbo连接于三相PWM逆变单元VSI的桥臂2中性点bo，输入侧电网的c相经过滤波电抗Lbo连接于三相PWM逆变单元VSI的桥臂3中性点co，滤波电容Cao、Cbo、Cco三者Y型连接于输出电网的a、b、c三相； Further, phase a of the power grid on the input side is connected to the neutral point ao of bridge arm 1 of the three-phase PWM inverter unit VSI through the filter reactance Lao, and phase b of the power grid on the input side is connected to the three-phase PWM inverter unit VSI through the filter reactance Lbo The neutral point bo of the bridge arm 2 of the input side power grid is connected to the neutral point co of the bridge arm 3 of the three-phase PWM inverter unit VSI through the filter reactance Lbo, and the filter capacitors Cao, Cbo, and Cco are Y-connected to Output the three phases a, b, and c of the power grid;
三相PWM逆变单元VSI的正负直流母线与DC/DC单元输出的正负直流母线分别相连。 The positive and negative DC buses of the three-phase PWM inverter unit VSI are respectively connected to the positive and negative DC buses output by the DC/DC unit.
采用上述技术方案，本发明具有如下有益效果： Adopt above-mentioned technical scheme, the present invention has following beneficial effect:
第一，本发明的路由器可方便地与可再生能源发电设备、储能设备、不同负荷相连，提高供电和用电的灵活性，能同时输出直流电和交流电，且输出电压可调，满足用户的不同需求。 First, the router of the present invention can be easily connected with renewable energy power generation equipment, energy storage equipment, and different loads to improve the flexibility of power supply and power consumption, and can output DC and AC at the same time, and the output voltage is adjustable to meet the needs of users. different needs.
第二、本发明的路由器在结构上省去传统工频变压器，由于多绕组变压器的各个绕组都交链同一个磁链，通过各绕组之间的功率耦合关系，可以实现各绕组输出功率的平衡；本发明的路由器采用共用铁芯结构，实现装置紧凑化，提升了装置的功率密度。 Second, the router of the present invention omits the traditional power frequency transformer in structure, because each winding of the multi-winding transformer is linked to the same magnetic link, through the power coupling relationship between the windings, the balance of the output power of each winding can be realized ; The router of the present invention adopts a shared iron core structure to realize the compactness of the device and improve the power density of the device.
第三、在本发明的电路中原边电流、副边电压、电流以及有功功率、无功功率均可控制，实现功率的灵活调度，路由器的功率因数任意可调，可实现无功补偿的功能；路由器通过AC-DC-AC的方式实现，可抑制电网谐波，并消除电压跌落、三相电压不平衡对负荷影响；同时，内设有中 高频变压器，可满足电气隔离的要求。 Third, in the circuit of the present invention, the primary side current, secondary side voltage, current, active power, and reactive power can all be controlled to realize flexible scheduling of power, and the power factor of the router can be adjusted arbitrarily, which can realize the function of reactive power compensation; The router is implemented in the form of AC-DC-AC, which can suppress the harmonics of the power grid, and eliminate the impact of voltage drop and three-phase voltage imbalance on the load; at the same time, it is equipped with a medium and high frequency transformer to meet the requirements of electrical isolation.
附图说明 Description of drawings
图1为本发明实施例单相路由器拓扑结构示意图； FIG. 1 is a schematic diagram of a single-phase router topology according to an embodiment of the present invention;
图2为本另一发明实施例三相路由器拓扑结构示意图。 FIG. 2 is a schematic diagram of a three-phase router topology according to another embodiment of the present invention.
具体实施方式 detailed description
为了使本发明的目的、技术方案及优点更加清楚明白，下面结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的结构图及具体实施例仅用以解释本发明，并不用于限定本发明。 In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the structural diagrams and specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.
本发明提供了一种实现分布式电源集成的能量路由器拓扑结构，路由器包括整流器、变换器和逆变器，每相具有n组级联的H桥型PWM整流器在输入侧，DC/DC变换器和1组三相PWM逆变器在输出侧；在每一相内，所述n组级联的PWM整流器交流侧联结交流电网的一相，所述n组级联的PWM整流器直流侧经n组电容连接所述DC/DC变换器；所述DC/DC变换器的直流输出侧经过并联输出直流电压，同时通过三相逆变实现三相交流输出。 The present invention provides an energy router topology for realizing distributed power integration, the router includes rectifiers, converters and inverters, each phase has n sets of cascaded H-bridge PWM rectifiers on the input side, and a DC/DC converter and 1 group of three-phase PWM inverters on the output side; in each phase, the AC side of the n groups of cascaded PWM rectifiers is connected to one phase of the AC grid, and the DC side of the n groups of cascaded PWM rectifiers is connected via n A group of capacitors is connected to the DC/DC converter; the DC output side of the DC/DC converter is connected in parallel to output a DC voltage, and at the same time realizes a three-phase AC output through a three-phase inverter.
实施例1 Example 1
图1为单相路由器拓扑结构示意图是本发明拓扑的基本单元模块，如图1所示，三相中的每一相基本单元模块由输入侧，DC/DC单元和输出侧构成。 Figure 1 is a schematic diagram of a single-phase router topology, which is the basic unit module of the topology of the present invention. As shown in Figure 1, each phase basic unit module in the three phases is composed of an input side, a DC/DC unit and an output side.
输入侧采用n个H桥型整流器单元(1ra，2ra，……，nra)级联而成(n为大于1的整数)。输入侧电网的A相经过滤波电抗1a连接于整流单元1a的桥臂1中性点a1a，整流单元1ra的桥臂2中性点b1a连接于整流单元2ra的桥臂1中性点a2a，循环往复，以此连接，整流单元nra的桥臂2中性点bna输出。整流单元的1ra的输出侧并联均压电容C1a，整流单元的2ra的输出侧并联均压电容C2a，以此方式连接，整流单元的nra的输出侧并联均压电容Can.。 The input side is formed by cascading n H-bridge rectifier units (1ra, 2ra, . . . , nra) (n is an integer greater than 1). Phase A of the input side power grid is connected to the neutral point a1a of the bridge arm 1 of the rectification unit 1a through the filter reactance 1a, and the neutral point b1a of the bridge arm 2 of the rectification unit 1ra is connected to the neutral point a2a of the bridge arm 1 of the rectification unit 2ra, and the cycle Reciprocating, with this connection, the neutral point bna of the bridge arm 2 of the rectifier unit nra outputs. The output side of 1ra of the rectifier unit is connected in parallel with a voltage equalizing capacitor C1a, and the output side of 2ra of the rectifier unit is connected in parallel with a voltage equalizing capacitor C2a. The output side of nra of the rectifier unit is connected in parallel with a voltage equalizing capacitor Can.
在DC/DC单元中，共包括n组原边的H桥逆变单元、共铁芯多绕组 中高频变压器和副边的n组H桥整流单元。在DC/DC单元的原边，逆变单元1ia的直流侧和直流电容C1a并联，交流侧与多绕组变压器的绕组r1相连；逆变单元2ia的直流侧和直流电容C2a并联，交流侧与多绕组变压器的绕组r2相连；循环往复，以此连接，逆变单元nia的直流侧和直流电容Cna并联，交流侧与多绕组变压器的绕组rn相连。在DC/DC单元的副边，整流单元1ra’的直流侧和输出侧直流电容Co并联，交流侧与多绕组变压器的绕组r1’相连；整流单元2ra’的直流侧和输出侧直流电容Co并联，交流侧与多绕组变压器的绕组r2’相连；循环往复，以此连接，整流单元nra’的直流侧和输出侧直流电容Co并联，交流侧与多绕组变压器的绕组rn’相连。 In the DC/DC unit, there are n sets of H-bridge inverter units on the primary side, a common-core multi-winding medium and high-frequency transformer, and n sets of H-bridge rectifier units on the secondary side. On the primary side of the DC/DC unit, the DC side of the inverter unit 1ia is connected in parallel with the DC capacitor C1a, and the AC side is connected with the winding r1 of the multi-winding transformer; the DC side of the inverter unit 2ia is connected in parallel with the DC capacitor C2a, and the AC side is connected with the multi-winding transformer. The winding r2 of the winding transformer is connected; the cycle is repeated, and the connection is repeated. The DC side of the inverter unit nia is connected in parallel with the DC capacitor Cna, and the AC side is connected to the winding rn of the multi-winding transformer. On the secondary side of the DC/DC unit, the DC side of the rectifier unit 1ra' is connected in parallel with the output side DC capacitor Co, and the AC side is connected with the winding r1' of the multi-winding transformer; the DC side of the rectifier unit 2ra' is connected in parallel with the output side DC capacitor Co , the AC side is connected to the winding r2' of the multi-winding transformer; in this connection, the DC side of the rectifier unit nra' is connected in parallel with the output-side DC capacitor Co, and the AC side is connected to the winding rn' of the multi-winding transformer.
在输出侧，将DC/DC单元副边的整流单元1ra’、2ra’…nra’直流输出侧的正负直流母线分别相连后，经过直流电容Co形成直流电压输出。同时直流电压经过逆变单元VSI的逆变之后，VSI的三个桥臂中性点ao、bo、co的电压经过输出侧的滤波电感Lao、Lbo、Lco和滤波电容Cao、Cbo、Cco的滤波作用后，形成三相交流电压输出。 On the output side, connect the positive and negative DC busbars on the DC output side of the rectifier units 1ra', 2ra'...nra' on the secondary side of the DC/DC unit respectively, and form a DC voltage output through the DC capacitor Co. At the same time, after the DC voltage is inverted by the inverter unit VSI, the voltages of the neutral points ao, bo, and co of the three bridge arms of VSI are filtered by the filter inductors Lao, Lbo, Lco and filter capacitors Cao, Cbo, and Cco on the output side. After functioning, a three-phase AC voltage output is formed.
实施例2 Example 2
图2所示为本发明整体拓扑结构，三相交流输入，三相交流和直流输出的能量路由器。基本单元模块由输入侧、DC/DC变换器和输出侧组成。 Fig. 2 shows the overall topology structure of the present invention, an energy router with three-phase AC input, three-phase AC and DC output. The basic unit module consists of input side, DC/DC converter and output side.
能量路由器输入侧由若干个H桥PWM整流器级联构成，其输入为交流电网电压，输出为若干个独立的直流电，即各级联H桥PWM整流器的输出；中间环节为若干个独立的双向DC/DC变换器，起着电气隔离和电压等级变换的作用；输出侧将各双向DC/DC变换器的直流输出直接并联，并通过一个DC/AC逆变器变换成交流电。 The input side of the energy router is composed of several H-bridge PWM rectifiers cascaded. The input is the AC grid voltage, and the output is several independent direct currents, that is, the output of all levels of H-bridge PWM rectifiers; the intermediate link is several independent bidirectional DC The /DC converter plays the role of electrical isolation and voltage level conversion; the output side directly connects the DC output of each bidirectional DC/DC converter in parallel, and converts it into alternating current through a DC/AC inverter.
在能量路由器的输入侧中，输入侧为多个级联的H桥单相PWM整流器，通过多个H桥级联可以获得较高的输入电压值。输入侧电网的A、B、C三相分别经过滤波电抗器1a、1b、1c连接于整流单元1ra、1rb、1rc的桥臂中性点a1a，a2b，a2c。 On the input side of the energy router, the input side is a plurality of cascaded H-bridge single-phase PWM rectifiers, and a higher input voltage value can be obtained by cascading multiple H-bridges. The three phases A, B, and C of the power grid on the input side are respectively connected to the bridge arm neutral points a 1a , a 2b , and a 2c of the rectifier units 1 ra , 1 rb , and 1 rc through filter reactors 1 a , 1 b , and 1 c .
输入侧电网的A相经过滤波电抗1a连接于整流单元1a的桥臂1中性点 a1a，整流单元1ra的桥臂2中性点b1a连接于整流单元2ra的桥臂1中性点a2a，循环往复，以此连接，整流单元nra的桥臂2中性点bna输出。每组整流单元的输出侧并联均压电容C1a，C2a，……，Cna。 Phase A of the power grid on the input side is connected to the neutral point a 1a of the bridge arm 1 of the rectification unit 1 a through the filter reactance 1 a , and the neutral point b 1a of the bridge arm 2 of the rectification unit 1 ra is connected to the bridge arm 1 of the rectification unit 2 ra The neutral point a 2a is reciprocated and connected in this way, and the neutral point b na of the bridge arm 2 of the rectification unit n ra outputs. The output side of each group of rectification units is connected in parallel with equalizing capacitors C 1a , C 2a , . . . , C na .
输入侧电网的B相经过滤波电抗1b连接于整流单元1b的桥臂1中性点a1b，整流单元1rb的桥臂2中性点b1b连接于整流单元2rb的桥臂1中性点a2b，循环往复，以此连接，整流单元nrb的桥臂2中性点bnb输出。每组整流单元的输出侧并联均压电容C1b，C2b，……，Cnb。 The B-phase of the input side grid is connected to the neutral point a 1b of the bridge arm 1 of the rectification unit 1 b through the filter reactance 1 b , and the neutral point b 1b of the bridge arm 2 of the rectification unit 1 rb is connected to the bridge arm 1 of the rectification unit 2 rb The neutral point a 2b is reciprocated and connected in this way, and the neutral point b nb of the bridge arm 2 of the rectification unit n rb is output. The output side of each group of rectification units is connected in parallel with equalizing capacitors C 1b , C 2b , . . . , C nb .
输入侧电网的C相经过滤波电抗1c连接于整流单元1c的桥臂1中性点a1c，整流单元1rc的桥臂2中性点b1c连接于整流单元2rc的桥臂1中性点a2c，循环往复，以此连接，整流单元nrc的桥臂2中性点bnc输出。每组整流单元的输出侧并联均压电容C1c，C2c，……，Cnc。 Phase C of the input grid is connected to the neutral point a 1c of the bridge arm 1 of the rectification unit 1 c through the filter reactance 1 c , and the neutral point b 1c of the bridge arm 2 of the rectification unit 1 rc is connected to the bridge arm 1 of the rectification unit 2 rc The neutral point a 2c is reciprocated and connected with this, and the neutral point b nc of the bridge arm 2 of the rectification unit n rc is output. The output side of each group of rectification units is connected in parallel with equalizing capacitors C 1c , C 2c , . . . , C nc .
整流单元nra、nrb、nrc的桥臂2中性点bna、bnb、bnc以Y型方式连接。 The bridge arm 2 neutral points b na , b nb , b nc of the rectifier units n ra , n rb , n rc are connected in a Y-shape.
能量路由器的DC/DC单元，各DC-DC变换器的高频变压器尽管具有自己独立的输入/输出绕组，但铁芯是共用的，相互之间存在磁性耦合，每相DC/DC模块包括n组H桥逆变单元、共铁芯多绕组中高频变压器和n组H桥整流单元。n组逆变单元的直流侧与输入侧级联的n组H桥单元直流侧相连接，n组逆变单元的交流侧连接中高频变压器的n个原边绕组，n组整流单元的交流侧连接多绕组变压器的n个副边绕组，n组整流单元的直流侧通过并联经过直流电容Co后与输出侧连接。 Although the DC/DC unit of the energy router and the high-frequency transformer of each DC-DC converter have their own independent input/output windings, the iron cores are shared and there is magnetic coupling between them. Each phase of the DC/DC module includes n A group of H-bridge inverter units, a common-core multi-winding medium-high frequency transformer and n groups of H-bridge rectifier units. The DC side of n groups of inverter units is connected to the DC side of n groups of H-bridge units cascaded on the input side, the AC side of n groups of inverter units is connected to n primary windings of medium and high frequency transformers, and the AC side of n groups of rectifier units The n secondary windings of the multi-winding transformer are connected, and the DC sides of the n groups of rectification units are connected to the output side after passing through the DC capacitor C o in parallel.
能量路由器的输出侧，电网的a相经过滤波电抗Lao连接于三相PWM逆变单元VSI的桥臂1中性点ao，输入侧电网的b相经过滤波电抗Lbo连接于三相PWM逆变单元VSI的桥臂2中性点bo，输入侧电网的c相经过滤波电抗Lbo连接于三相PWM逆变单元VSI的桥臂3中性点co，滤波电容Cao、Cbo、Cco三者Y型连接于输出电网的a、b、c三相。三相PWM逆变单元VSI的正负直流母线与DC/DC单元输出的正负直流母线分别相连。 On the output side of the energy router, phase a of the power grid is connected to the neutral point a o of bridge arm 1 of the three-phase PWM inverter unit VSI through the filter reactance L ao , and phase b of the power grid on the input side is connected to the three-phase PWM through the filter reactance L bo The neutral point b o of the bridge arm 2 of the inverter unit VSI, the c-phase of the input side power grid is connected to the neutral point c o of the bridge arm 3 of the three-phase PWM inverter unit VSI through the filter reactance L bo , and the filter capacitors C ao and C bo , C co are Y-type connected to the a, b, c three-phase of the output grid. The positive and negative DC buses of the three-phase PWM inverter unit VSI are respectively connected to the positive and negative DC buses output by the DC/DC unit.
以上所述实施例仅表达了本发明的实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做 出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。 The above-mentioned embodiments only express the implementation manner of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that, for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.
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