TWI720573B - Power apparatus applied in sst structure and three-phase power source system having the same - Google Patents

Power apparatus applied in sst structure and three-phase power source system having the same Download PDF

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TWI720573B
TWI720573B TW108127990A TW108127990A TWI720573B TW I720573 B TWI720573 B TW I720573B TW 108127990 A TW108127990 A TW 108127990A TW 108127990 A TW108127990 A TW 108127990A TW I720573 B TWI720573 B TW I720573B
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power supply
conversion
bidirectional
coupled
bus
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TW108127990A
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TW202107822A (en
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李聖華
黃文隆
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台達電子工業股份有限公司
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Abstract

A power apparatus applied in a SST structure includes an AC-to-DC conversion unit, a first DC bus, and a plurality of bi-directional DC conversion units. The first sides of the bi-directional DC conversion units are coupled to the first DC bus. The second sides of the bi-directional DC conversion units are configured to form at least one second DC bus, and the number of the at least one second DC bus is a bus amount. The bi-directional DC conversion units receive a bus voltage of the first DC bus and convert the bus voltage into at least one DC voltage, or the bi-directional DC conversion units receive at least one external DC voltage and convert the at least one external DC voltage into the bus voltage.

Description

應用於固態變壓器架構之電源裝置及三相電源系統 Power supply device and three-phase power system applied to solid-state transformer architecture

本發明係有關一種電源裝置及三相電源系統，尤指一種應用於固態變壓器架構之電源裝置及三相電源系統。 The present invention relates to a power supply device and a three-phase power supply system, in particular to a power supply device and a three-phase power supply system applied to a solid-state transformer architecture.

隨著電力電子元件的推陳出新以及分散式電源、智慧型電網的蓬勃發展，固態變壓器(solid state transformer,SST)已成為越來越熱門的研究課題。固態變壓器具有多功能且高性能的特性，包括整合微電網、校正功率因數、補償無效功率、隔離故障電流以及調整輸出電壓等。 With the development of power electronic components and the vigorous development of distributed power supplies and smart power grids, solid state transformers (SST) have become more and more popular research topics. Solid-state transformers have multi-functional and high-performance characteristics, including integration of microgrids, power factor correction, reactive power compensation, fault current isolation, and output voltage adjustment.

在直流充電站的設計中，如何維持與交流電網電氣隔離，意即直流側必須保持與其它線路一切隔離(包括接地)，直接在直流充電站設計電氣隔離，的確存在其電路設計上的難度與成本考量，也因此，甚少有直接在直流充電站端設計電氣隔離的研究與開發。再者，對於不同電壓需求的設計，以符合不同規格電動車充電需求，也是設計直流充電站所高度重視的課題。 In the design of the DC charging station, how to maintain electrical isolation from the AC grid means that the DC side must be kept isolated from all other lines (including grounding), and the electrical isolation is directly designed in the DC charging station. There are indeed difficulties and difficulties in circuit design. For cost considerations, and therefore, there are very few research and developments that directly design electrical isolation at the DC charging station side. Furthermore, the design of different voltage requirements to meet the charging requirements of different specifications of electric vehicles is also a topic that is highly valued in the design of DC charging stations.

為此，如何設計出一種應用於固態變壓器架構之電源裝置及三相電源系統，來解決前述的技術問題，乃為本案發明人所研究的重要課題。 For this reason, how to design a power supply device and a three-phase power system applied to a solid-state transformer architecture to solve the aforementioned technical problems is an important subject studied by the inventors of this case.

本發明之目的在於提供一種應用於固態變壓器架構之電源裝置，解決現有技術之問題。 The purpose of the present invention is to provide a power supply device applied to a solid-state transformer structure to solve the problems of the prior art.

為達成前揭目的，本發明所提出的應用於固態變壓器架構之電源裝置，其包含交流對直流轉換單元、第一直流匯流排以及複數雙向直流轉換單元。交流對直流轉換單元具有第一側與第二側，其中交流對直流轉換單元之第一側耦接交流電源。第一直流匯流排耦接交流對直流轉換單元之第二側，且具有匯流排電壓。各雙向直流轉換單元具有第一側與第二側，且為單級轉換架構或者兩級轉換架構，其中雙向直流轉換單元之第一側耦接第一直流匯流排，雙向直流轉換單元之第二側配置形成至少一第二直流匯流排，至少一第二直流匯流排的數量為匯流排數量。雙向直流轉換單元接收匯流排電壓，且轉換匯流排電壓為與匯流排數量相同的至少一直流電壓，或者雙向直流轉換單元接收與匯流排數量相同的至少一外部直流電壓，且轉換至少一外部直流電壓為匯流排電壓。 In order to achieve the aforementioned purpose, the power supply device applied to the solid-state transformer architecture proposed by the present invention includes an AC-to-DC conversion unit, a first DC bus, and a plurality of bidirectional DC conversion units. The AC-DC conversion unit has a first side and a second side, wherein the first side of the AC-DC conversion unit is coupled to an AC power source. The first DC bus is coupled to the second side of the AC to DC conversion unit and has a bus voltage. Each bidirectional DC conversion unit has a first side and a second side, and is a single-stage conversion architecture or a two-stage conversion architecture, wherein the first side of the bidirectional DC conversion unit is coupled to the first DC bus, and the second side of the bidirectional DC conversion unit The two sides are configured to form at least one second DC bus bar, and the number of at least one second DC bus bar is the number of bus bars. The bidirectional DC conversion unit receives the busbar voltage and converts the busbar voltage to at least the same number of busbars as at least a DC voltage, or the bidirectional DC conversion unit receives the same number of busbars as at least one external DC voltage and converts at least one external DC voltage The voltage is the bus voltage.

藉由所提出的應用於固態變壓器架構之電源裝置，可提供不同的電壓需求且滿足隔離需求。 With the proposed power supply device applied to the solid-state transformer architecture, different voltage requirements can be provided and isolation requirements can be met.

本發明之目的在於提供一種應用於固態變壓器架構之三相電源系統，解決現有技術之問題。 The purpose of the present invention is to provide a three-phase power system applied to a solid-state transformer architecture to solve the problems of the prior art.

為達成前揭目的，本發明所提出的應用於固態變壓器架構之三相電源系統，其中任一相交流電源串聯耦接複數個前述中電源裝置的交流對直流轉換單元，且雙向直流轉換單元之之第二側並聯耦接。 In order to achieve the foregoing purpose, the present invention proposes a three-phase power supply system applied to a solid-state transformer architecture, in which any phase AC power supply is coupled in series to the AC-DC conversion units of the aforementioned intermediate power supply devices, and one of the two-way DC conversion units The second side is coupled in parallel.

藉由所提出的應用於固態變壓器架構之三相電源系統，可提供不同的電壓需求且滿足隔離需求，並且達到均壓且供電平衡的功效。 The proposed three-phase power system applied to the solid-state transformer architecture can provide different voltage requirements and meet the isolation requirements, and achieve the effects of voltage equalization and power supply balance.

為了能更進一步瞭解本發明為達成預定目的所採取之技術、手段及功效，請參閱以下有關本發明之詳細說明與附圖，相信本發明之目的、特徵與特點，當可由此得一深入且具體之瞭解，然而所附圖式僅提供參考與說明用，並非用來對本發明加以限制者。 In order to have a better understanding of the technology, means and effects adopted by the present invention to achieve the intended purpose, please refer to the following detailed description and drawings of the present invention. I believe that the purpose, features and characteristics of the present invention can be obtained from this in depth and For specific understanding, however, the accompanying drawings are only provided for reference and illustration, and are not intended to limit the present invention.

11:交流對直流轉換單元 11: AC to DC conversion unit

12:第一直流匯流排 12: The first DC bus

13:雙向直流轉換單元 13: Bidirectional DC conversion unit

14:第二直流匯流排 14: The second DC bus

131:第一級轉換電路 131: first-stage conversion circuit

132:升壓/降壓電路 132: boost/buck circuit

21:儲能系統 21: Energy storage system

22:光伏電池 22: Photovoltaic cells

23:充電站 23: Charging station

211:儲能系統轉換器 211: Energy storage system converter

221:光伏電池轉換器 221: Photovoltaic cell converter

231:充電站轉換器 231: Charging station converter

Vac:交流電源 Vac: AC power

Vb:匯流排電壓 Vb: bus voltage

圖1A：為本發明應用於固態變壓器架構之電源裝置之第一實施例的電路方塊圖。 Fig. 1A is a circuit block diagram of the first embodiment of a power supply device with a solid-state transformer architecture according to the present invention.

圖1B：為本發明應用於固態變壓器架構之電源裝置之第二實施例的電路方塊圖。 Fig. 1B is a circuit block diagram of a second embodiment of a power supply device with a solid-state transformer architecture according to the present invention.

圖1C：為本發明應用於固態變壓器架構之電源裝置之第三實施例的電路方塊圖。 Fig. 1C is a circuit block diagram of a third embodiment of a power supply device with a solid-state transformer architecture according to the present invention.

圖2A：為本發明電源裝置的雙向直流轉換單元之第一實施例的電路方塊圖。 Fig. 2A is a circuit block diagram of the first embodiment of the bidirectional DC conversion unit of the power supply device of the present invention.

圖2B：為本發明電源裝置的雙向直流轉換單元之第二實施例的電路方塊圖。 Fig. 2B is a circuit block diagram of the second embodiment of the bidirectional DC conversion unit of the power supply device of the present invention.

圖3A：為本發明電源裝置應用於外部裝置之第一實施例的電路方塊圖。 Fig. 3A is a circuit block diagram of the first embodiment of the power supply device of the present invention applied to an external device.

圖3B：為本發明電源裝置應用於外部裝置之第二實施例的電路方塊圖。 Fig. 3B is a circuit block diagram of the second embodiment of the power supply device of the present invention applied to an external device.

圖3C：為本發明電源裝置應用於外部裝置之第三實施例的電路方塊圖。 Fig. 3C is a circuit block diagram of the third embodiment of the power supply device of the present invention applied to an external device.

圖4：為本發明應用於固態變壓器架構之電源裝置單一相連接之電路方塊圖。 Fig. 4 is a circuit block diagram of a single-phase connection of a power supply device with a solid-state transformer structure according to the present invention.

圖5：為本發明應用於固態變壓器架構之電源裝置三相連接之電路方塊圖。 Figure 5: is a circuit block diagram of the three-phase connection of the power supply device of the present invention applied to the solid-state transformer architecture.

茲有關本發明之技術內容及詳細說明，配合圖式說明如下。 The technical content and detailed description of the present invention are described below in conjunction with the drawings.

請參見圖1A至圖1C所示，其係分別為本發明應用於固態變壓器架構之電源裝置之第一實施例至第三實施例之電路方塊圖。所述電源裝置包含交流對直流轉換單元11、第一直流匯流排12以及複數雙向直流轉換單元13。 Please refer to FIG. 1A to FIG. 1C, which are circuit block diagrams of the first embodiment to the third embodiment of the power supply device applied to the solid-state transformer architecture of the present invention, respectively. The power supply device includes an AC to DC conversion unit 11, a first DC bus 12 and a plurality of bidirectional DC conversion units 13.

交流對直流轉換單元11具有第一側與第二側，其中交流對直流轉換單元11之第一側耦接交流電源Vac，其中所述交流電源Vac可為一電力電網。交流對直流轉換單元11轉換交流電源Vac為直流電源(以下稱匯流排電壓或母線電壓)。第一直流匯流排12耦接交流對直流轉換單元11之第二側，且具有所述匯流排電壓Vb，意即匯流排電壓Vb為第一直流匯流排12上的直流電壓。 The AC-to-DC conversion unit 11 has a first side and a second side. The first side of the AC-to-DC conversion unit 11 is coupled to an AC power source Vac, where the AC power source Vac may be a power grid. The AC to DC conversion unit 11 converts the AC power Vac into a DC power (hereinafter referred to as bus voltage or bus voltage). The first DC bus 12 is coupled to the second side of the AC-DC conversion unit 11 and has the bus voltage Vb, which means that the bus voltage Vb is the DC voltage on the first DC bus 12.

各雙向直流轉換單元13具有一第一側與一第二側，且各雙向直流轉換單元13可為單級轉換架構或者兩級轉換架構，容後說明。如圖1A至圖1C所示，該等雙向直流轉換單元13之該等第一側耦接第一直流匯流排12，即耦接交流對直流轉換單元11之第二側。 Each bidirectional DC conversion unit 13 has a first side and a second side, and each bidirectional DC conversion unit 13 can be a single-stage conversion architecture or a two-stage conversion architecture, which will be described later. As shown in FIGS. 1A to 1C, the first sides of the bidirectional DC conversion units 13 are coupled to the first DC bus bar 12, that is, to the second side of the AC-DC conversion unit 11.

該等雙向直流轉換單元13之該等第二側配置係透過預先配線或透過開關切換，以形成至少一第二直流匯流排14，該至少一第二直流匯流排14的數量為一匯流排數量。圖1A至圖1C所示係為具有三組隔離直流電源的電源裝置，然不以此為限制本發明。為方便且清楚說明，以圖1A至圖1C為例說明。 在圖1A中，由於三個雙向直流轉換單元13的三個第二側係彼此並聯耦接，因此三個雙向直流轉換單元13的三個第二側配置形成匯流排數量為1的第二直流匯流排14。 The second side configurations of the bidirectional DC conversion units 13 are pre-wired or switched through switches to form at least one second DC bus 14. The number of the at least one second DC bus 14 is a bus number . Figures 1A to 1C show a power supply device with three sets of isolated DC power supplies, but the present invention is not limited by this. For convenience and clear description, take FIGS. 1A to 1C as examples. In FIG. 1A, since the three second sides of the three bidirectional DC conversion units 13 are coupled in parallel with each other, the three second sides of the three bidirectional DC conversion units 13 are configured to form a second DC with a bus number of 1. BUS 14.

在圖1B中，由於第一個雙向直流轉換單元13與第二個雙向直流轉換單元13的兩個第二側係彼此並聯耦接，並且第三個雙向直流轉換單元13的第二側單獨配置，因此三個雙向直流轉換單元13的三個第二側配置形成匯流排數量為2的第二直流匯流排14。順帶一提，在圖1B中，並不以第一個雙向直流轉換單元13與第二個雙向直流轉換單元13的兩個第二側係彼此並聯耦接為限制，換言之，只要任兩個雙向直流轉換單元13的兩個第二側係彼此並聯耦接，而剩下的一個雙向直流轉換單元13的第二側單獨配置，所形成匯流排數量為2的第二直流匯流排14，皆應包含於本發明之範疇中。 In FIG. 1B, since the two second sides of the first bidirectional DC conversion unit 13 and the second bidirectional DC conversion unit 13 are coupled in parallel to each other, and the second side of the third bidirectional DC conversion unit 13 is separately configured Therefore, the three second sides of the three bidirectional DC conversion units 13 are configured to form a second DC bus bar 14 with a number of two bus bars. By the way, in FIG. 1B, it is not restricted that the two second sides of the first bidirectional DC conversion unit 13 and the second bidirectional DC conversion unit 13 are coupled in parallel with each other. In other words, as long as any two bidirectional DC conversion units 13 The two second sides of the DC conversion unit 13 are coupled to each other in parallel, and the second side of the remaining one bidirectional DC conversion unit 13 is separately configured, and the second DC bus 14 with a number of two bus bars is formed. It is included in the scope of the present invention.

在圖1C中，由於三個雙向直流轉換單元13的三個第二側單獨配置，因此三個雙向直流轉換單元13的三個第二側配置形成匯流排數量為3的第二直流匯流排14。 In FIG. 1C, since the three second sides of the three bidirectional DC conversion units 13 are separately configured, the three second sides of the three bidirectional DC conversion units 13 are configured to form a second DC bus 14 with a number of three bus bars. .

順帶一提，若雙向直流轉換單元13的數量為四個，即匯流排數量為4時，則四個雙向直流轉換單元13的四個第二側可配置形成第二直流匯流排14的數量可為1~4。其中，數量為1係為四個雙向直流轉換單元13的四個第二側係彼此並聯耦接；數量為4係為四個雙向直流轉換單元13的四個第二側單獨配置；數量為2係為四個雙向直流轉換單元13的四個第二側的兩者彼此並聯耦接，另兩者彼此並聯耦接，或者四個雙向直流轉換單元13的四個第二側的三者彼此並聯耦接，剩下的一者單獨配置；數量為3係為四個雙向直流轉換單元13的四個第二側的兩者彼此並聯耦接，剩下的兩者個別單獨配置。因此，對於數量為N的雙向直流轉換單元13，其第二側所配置形成第二直流匯流排14的數量可為1~N，其配置方式如前所述，在此不再贅述。 Incidentally, if the number of bidirectional DC conversion units 13 is four, that is, when the number of bus bars is 4, the four second sides of the four bidirectional DC conversion units 13 can be configured to form the number of second DC bus bars 14 It is 1~4. Among them, the number of series 1 means that the four second sides of the four bidirectional DC conversion units 13 are coupled in parallel; the series of 4 means that the four second sides of the four bidirectional DC conversion units 13 are individually configured; the number is 2 It is that two of the four second sides of the four bidirectional DC conversion units 13 are coupled in parallel with each other, and the other two are coupled in parallel with each other, or three of the four second sides of the four bidirectional DC conversion units 13 are coupled in parallel with each other For coupling, the remaining one is configured separately; a number of 3 means that two of the four second sides of the four bidirectional DC conversion units 13 are coupled in parallel with each other, and the remaining two are individually configured separately. Therefore, for the number of N bidirectional DC conversion units 13, the number of the second DC bus bars 14 configured on the second side thereof can be 1~N, and the configuration method is as described above, which will not be repeated here.

請參見圖2A與圖2B所示，其係分別為本發明電源裝置的雙向直流轉換單元之第一實施例與第二實施例的電路方塊圖。如前所述，各雙向直流轉換單元13可為單級轉換架構或者兩級轉換架構，前者如圖2A所示，後者如圖2B所示。如圖2A所示，雙向直流轉換單元13的單級轉換架構係僅具有第一級轉換電路131，該第一級轉換電路131包含隔離變壓器與初級側諧振電路和次級側諧振電路。初級側諧振電路耦接於隔離變壓器的初級側，次級側諧振電路耦接於隔離變壓器的次級側。在本實施例中，初級側諧振電路與次級側諧振電路可為對稱的CLLC諧振電路，因此第一級轉換電路131係為CLLC諧振式直流電源轉換電路。 Please refer to FIG. 2A and FIG. 2B, which are circuit block diagrams of the first embodiment and the second embodiment of the bidirectional DC conversion unit of the power supply device of the present invention, respectively. As mentioned above, each bidirectional DC conversion unit 13 may be a single-stage conversion architecture or a two-stage conversion architecture. The former is shown in FIG. 2A, and the latter is shown in FIG. 2B. As shown in FIG. 2A, the single-stage conversion architecture of the bidirectional DC conversion unit 13 only has a first-stage conversion circuit 131, and the first-stage conversion circuit 131 includes an isolation transformer, a primary side resonant circuit and a secondary side resonant circuit. The primary side resonant circuit is coupled to the primary side of the isolation transformer, and the secondary side resonant circuit is coupled to the secondary side of the isolation transformer. In this embodiment, the primary side resonant circuit and the secondary side resonant circuit can be symmetrical CLLC resonant circuits, so the first-stage conversion circuit 131 is a CLLC resonant DC power conversion circuit.

如圖2B所示，雙向直流轉換單元13的兩級轉換架構係具有第一級轉換電路131與第二級轉換電路(即升壓/降壓電路132)。即相較於圖2A所示，兩級轉換架構更包含作為第二級轉換電路的升壓/降壓電路132。所述升壓/降壓電路132用以提供升壓或降壓轉換之用。可根據實際應用的需求，選擇單級轉換架構的雙向直流轉換單元13，或者選擇兩級轉換架構的雙向直流轉換單元13。其中兩級轉換架構的雙向直流轉換單元13可提供較寬的轉換電壓範圍，即其電壓動態調節較佳。舉例來說，若雙向直流轉換單元13之第一側為輸入側，且其為1580伏特，則對單級轉換架構的雙向直流轉換單元13來說，其第二側可輸出的電壓範圍介於800至1000伏特，而對兩級轉換架構的雙向直流轉換單元13來說，其第二側可輸出的電壓範圍介於200至1000伏特，因此，兩級轉換架構的雙向直流轉換單元13可提供較寬的轉換電壓範圍，可獲得較佳的電壓動態調節。 As shown in FIG. 2B, the two-stage conversion structure of the bidirectional DC conversion unit 13 has a first-stage conversion circuit 131 and a second-stage conversion circuit (ie, a boost/buck circuit 132). That is, compared to that shown in FIG. 2A, the two-stage conversion architecture further includes a boost/buck circuit 132 as a second-stage conversion circuit. The step-up/step-down circuit 132 is used to provide step-up or step-down conversion. The bidirectional DC conversion unit 13 with a single-stage conversion architecture or the bidirectional DC conversion unit 13 with a two-stage conversion architecture can be selected according to actual application requirements. Among them, the bidirectional DC conversion unit 13 of the two-stage conversion structure can provide a wider conversion voltage range, that is, its voltage dynamic adjustment is better. For example, if the first side of the bidirectional DC conversion unit 13 is the input side and it is 1580 volts, then for the bidirectional DC conversion unit 13 of the single-stage conversion architecture, the voltage range that can be output from the second side is between 800 to 1000 volts, and for the bidirectional DC conversion unit 13 of the two-stage conversion architecture, the voltage range that can be output on the second side is between 200 and 1000 volts. Therefore, the bidirectional DC conversion unit 13 of the two-stage conversion architecture can provide A wider switching voltage range can obtain better dynamic voltage regulation.

請參見圖3A至圖3C所示，其係分別為本發明電源裝置應用於外部裝置之第一實施例至第三實施例的電路方塊圖。以三個雙向直流轉換單元13為例，在圖3A中，三個雙向直流轉換單元13的三個第二側配置形成匯流排數 量為1的第二直流匯流排14，並且各雙向直流轉換單元13為單級轉換架構(即僅具有第一級轉換電路131)。所述電源裝置可與外部裝置，例如儲能系統(energy storage system,ESS)21、光伏電池(photovoltaic cell)22以及充電站(charging station)23電性連接。附帶一提，與電源裝置電性連接的外部裝置的種類及數量不以圖3A所示為限制，亦即電源裝置可電性連接多個儲能系統21、光伏電池22以及充電站23。 Please refer to FIGS. 3A to 3C, which are circuit block diagrams of the first embodiment to the third embodiment of the power supply device of the present invention applied to an external device, respectively. Taking three bidirectional DC conversion units 13 as an example, in FIG. 3A, three second sides of the three bidirectional DC conversion units 13 are configured to form a bus bar number The second DC bus bar 14 has a quantity of 1, and each bidirectional DC conversion unit 13 has a single-stage conversion structure (that is, only has the first-stage conversion circuit 131). The power supply device may be electrically connected to external devices, such as an energy storage system (ESS) 21, a photovoltaic cell (photovoltaic cell) 22, and a charging station (charging station) 23. Incidentally, the type and number of external devices electrically connected to the power supply device are not limited as shown in FIG. 3A, that is, the power supply device can be electrically connected to multiple energy storage systems 21, photovoltaic cells 22, and charging stations 23.

配合單級轉換架構的雙向直流轉換單元13，因此對儲能系統21而言，需搭配一儲能系統轉換器211，例如雙向充電器(ESS bi-directional charger)，作為第二直流匯流排14供電至儲能系統21的電源轉換，或者儲能系統21供電至第二直流匯流排14的電源轉換。對光伏電池22而言，需搭配一光伏電池轉換器221，例如具有最大功率點追踪功能的轉換器(PV MPPT)，作為光伏電池22供電至第二直流匯流排14的電源轉換。對充電站23而言，需搭配一充電站轉換器231，例如隔離式充電器(isolated charger)，作為第二直流匯流排14供電至充電站23的電源轉換，或者充電站23供電至第二直流匯流排14的電源轉換。因此，在單級轉換架構的雙向直流轉換單元13下，對儲能系統21而言，儲能系統轉換器211相當於另一級的電源轉換器；對光伏電池22而言，光伏電池轉換器221相當於另一級的電源轉換器；對充電站23而言，充電站轉換器231相當於另一級的電源轉換器。然根據實際應用的需求，對匯流排數量為1的第二直流匯流排14的架構來說，並不以圖3A所示單級轉換架構的雙向直流轉換單元13為限制，亦即雙向直流轉換單元13亦可為兩級轉換架構所實現，主要取決於後級裝置或者電壓範圍的需求。透過具有功率傳輸功能的雙向直流轉換單元13，可達到雙向直流轉換單元13供電經第二直流匯流排14再至外部裝置的功率潮流方向，以及外部裝置供電經第二直流匯流排14再至雙向直流轉換單元13的功率潮流方向的雙向功率潮流操作，以提高對外部裝置應用的共通性與彈性。 Cooperate with the bidirectional DC conversion unit 13 of the single-stage conversion architecture. Therefore, for the energy storage system 21, an energy storage system converter 211, such as an ESS bi-directional charger, is required as the second DC bus 14 The power supply to the energy storage system 21 is converted, or the energy storage system 21 is supplied to the second DC bus 14. For the photovoltaic cell 22, a photovoltaic cell converter 221, such as a converter with maximum power point tracking function (PV MPPT), is required to be used as a power conversion for the photovoltaic cell 22 to supply power to the second DC bus 14. For the charging station 23, a charging station converter 231, such as an isolated charger, is required to convert the power from the second DC bus 14 to the charging station 23, or from the charging station 23 to the second Power conversion of the DC bus 14. Therefore, under the bidirectional DC conversion unit 13 of the single-stage conversion architecture, for the energy storage system 21, the energy storage system converter 211 is equivalent to another level of power converter; for the photovoltaic cell 22, the photovoltaic cell converter 221 It is equivalent to another level of power converter; for the charging station 23, the charging station converter 231 is equivalent to another level of power converter. However, according to actual application requirements, the architecture of the second DC bus 14 with the number of bus bars is not limited to the bidirectional DC conversion unit 13 of the single-stage conversion architecture shown in FIG. 3A, that is, bidirectional DC conversion. The unit 13 can also be implemented by a two-stage conversion architecture, which mainly depends on the requirements of the downstream device or the voltage range. Through the bidirectional DC conversion unit 13 with power transmission function, it is possible to achieve the power flow direction of the bidirectional DC conversion unit 13 through the second DC bus 14 and then to the external device, and the external device power supply through the second DC bus 14 and then bidirectional The bidirectional power flow operation of the power flow direction of the DC conversion unit 13 improves the commonality and flexibility of application to external devices.

在圖3B中，三個雙向直流轉換單元13的三個第二側配置形成匯流排數量為2的第二直流匯流排14，並且前兩個雙向直流轉換單元13的第二側配置形成一個第二直流匯流排14，各雙向直流轉換單元13為單級轉換架構(即僅具有第一級轉換電路131)，第三個雙向直流轉換單元13的第二側單獨配置形成另一個第二直流匯流排14，雙向直流轉換單元13為兩級轉換架構(即具有第一級轉換電路131與第二級轉換電路)。其中前兩個雙向直流轉換單元13與外部裝置的應用操作可參見圖3A及其說明，在此不再贅述。 In FIG. 3B, the three second sides of the three bidirectional DC conversion units 13 are configured to form a second DC bus bar 14 with a bus bar number of 2, and the second sides of the first two bidirectional DC conversion units 13 are configured to form a first Two DC busbars 14, each bidirectional DC conversion unit 13 has a single-stage conversion structure (that is, only the first-stage conversion circuit 131), and the second side of the third bidirectional DC conversion unit 13 is separately configured to form another second DC bus In row 14, the bidirectional DC conversion unit 13 has a two-level conversion structure (that is, it has a first-level conversion circuit 131 and a second-level conversion circuit). The application operations of the first two bidirectional DC conversion units 13 and the external device can be seen in FIG. 3A and its description, which will not be repeated here.

配合兩級轉換架構的雙向直流轉換單元13，因此對充電站23而言，則可不須搭配充電站轉換器231(如圖3A所示)，透過升壓/降壓電路132的第二級轉換，可滿足充電站23對於較寬電壓供電的需求。附帶一提，與電源裝置電性連接的外部裝置的種類及數量不以圖3B所示為限制，亦即電源裝置可電性連接多個儲能系統21、光伏電池22以及充電站23，並且根據實際應用的需求，對匯流排數量為2的第二直流匯流排14的架構來說，並不以圖3B所示單級轉換架構的雙向直流轉換單元13為限制，亦即雙向直流轉換單元13亦可為兩級轉換架構所實現，主要取決於後級裝置或者電壓範圍的需求。 With the bidirectional DC conversion unit 13 of the two-stage conversion structure, the charging station 23 does not need to be equipped with the charging station converter 231 (as shown in FIG. 3A), and the second-stage conversion of the boost/buck circuit 132 is unnecessary. , Which can meet the demand of the charging station 23 for a wider voltage power supply. Incidentally, the type and number of external devices that are electrically connected to the power supply device are not limited as shown in FIG. 3B, that is, the power supply device can be electrically connected to multiple energy storage systems 21, photovoltaic cells 22, and charging stations 23, and According to actual application requirements, the architecture of the second DC bus 14 with the number of bus bars is not limited to the bidirectional DC conversion unit 13 of the single-stage conversion architecture shown in FIG. 3B, that is, the bidirectional DC conversion unit 13 can also be implemented by a two-stage conversion architecture, which mainly depends on the requirements of the downstream device or the voltage range.

在圖3C中，三個雙向直流轉換單元13的三個第二側配置形成匯流排數量為3的第二直流匯流排14，並且各雙向直流轉換單元13為兩級轉換架構(即具有第一級轉換電路131與第二級轉換電路)。配合兩級轉換架構的雙向直流轉換單元13，因此對充電站23而言，則可不須搭配充電站轉換器231；對光伏電池22而言，則可不須搭配光伏電池轉換器221；對儲能系統21而言，則可不須搭配儲能系統轉換器211，透過升壓/降壓電路132的第二級轉換，可滿足充電站23、光伏電池22以及儲能系統21對於所需電壓供電的需求。 In FIG. 3C, the three second sides of the three bidirectional DC conversion units 13 are configured to form a second DC bus bar 14 with a number of 3 bus bars, and each bidirectional DC conversion unit 13 has a two-stage conversion structure (that is, it has a first Stage conversion circuit 131 and second stage conversion circuit). With the two-stage conversion structure of the two-way DC conversion unit 13, so for the charging station 23, the charging station converter 231 is not necessary; for the photovoltaic cell 22, the photovoltaic battery converter 221 is not necessary; for energy storage For the system 21, the energy storage system converter 211 is not required. Through the second-stage conversion of the boost/buck circuit 132, the charging station 23, the photovoltaic cell 22 and the energy storage system 21 can supply power to the required voltage. demand.

附帶一提，為方便說明，圖3A圖3C僅為說明單一電源裝置與儲能系統21、光伏電池22以及充電站23的連接關係，然而實際應用會以三相多 組並聯耦接的方式實現，容後說明。以下，以舉例的實施例說明電源裝置與儲能系統21、光伏電池22以及充電站23的電能管理、供需之應用。以所述交流電源Vac為電力電網為例，並且所列舉之實施方式僅為方便說明本發明之用，非以限制本發明。 Incidentally, for the convenience of description, FIGS. 3A and 3C only illustrate the connection relationship between a single power supply device and the energy storage system 21, the photovoltaic cell 22, and the charging station 23. However, the actual application will be based on three-phase multiple The parallel coupling of groups is realized, which will be described later. Hereinafter, the application of the power supply device and the energy storage system 21, the photovoltaic cell 22, and the charging station 23 to the power management, supply and demand of the power supply device and the energy storage system 21 will be described below with examples. Taking the AC power source Vac as the power grid as an example, and the listed embodiments are only for the convenience of describing the present invention, and are not intended to limit the present invention.

第一實施例：假若充電站23的需求電能為100kW，電網(交流電源Vac)所能供電的上限為50kW，如此，充電站23不足的電能可以透過光伏電池22與儲能系統21的通訊與協同所供應。例如，若光伏電池22可提供50kW，儲能系統21則無需提供電能。又若光伏電池22可提供20kW，儲能系統21則提供30kW，(或者若光伏電池22可提供30kW，儲能系統21則提供20kW)，使得電網、光伏電池22以及儲能系統21可對充電站23提供足夠的需求電能。換言之，可透過功率調節系統(power conditioning system,PCS)的控制方式，實現電能管理、調度、改善電力品質的功能。 The first embodiment: if the required electric energy of the charging station 23 is 100kW, the upper limit of the power supply from the power grid (AC power supply Vac) is 50kW. In this way, the insufficient electric energy of the charging station 23 can be communicated with the energy storage system 21 through the photovoltaic battery 22 Cooperate with the supply. For example, if the photovoltaic cell 22 can provide 50kW, the energy storage system 21 does not need to provide electrical energy. And if the photovoltaic cell 22 can provide 20kW, the energy storage system 21 provides 30kW, (or if the photovoltaic cell 22 can provide 30kW, the energy storage system 21 provides 20kW), so that the grid, the photovoltaic cell 22 and the energy storage system 21 can be charged The station 23 provides sufficient demand power. In other words, through the control method of the power conditioning system (PCS), the functions of power management, dispatch, and improvement of power quality can be realized.

第二實施例：一般而言，電網優先供電或者光伏電池22、儲能系統21優先供電，常取決於供電時段與電價(發電成本)所決定。舉例來說，在尖峰用電期間(例如上午10點至下午2點)，由於電網的發電成本較高，因此，充電站23主要的電能來源盡可能地透過儲能系統21和/或光伏電池22所提供，充電站23尚有不足的電能則再由電網提供，藉此，透過削減尖峰用電、搭配時間電價，可達到節電、節費的功效。反之，在離峰用電期間，由於電網的發電成本較低，因此，充電站23主要的電能來源盡可能地透過電網所提供，同時電網(和/或光伏電池22)亦可對儲能系統21進行充電，使其能夠處於滿充電的狀態，能夠提供備援、冗餘電力的需求。 Second embodiment: Generally speaking, the power grid gives priority to power supply or the photovoltaic cell 22 and the energy storage system 21 give priority to power supply, which is often determined by the power supply period and the electricity price (generation cost). For example, during peak power consumption periods (for example, 10 am to 2 pm), due to the high cost of power generation from the grid, the main source of electrical energy for the charging station 23 is as far as possible through the energy storage system 21 and/or photovoltaic cells 22, the insufficient electric energy of the charging station 23 is then provided by the grid, so that by reducing the peak electricity consumption and matching the time price, the effect of saving electricity and cost can be achieved. Conversely, during off-peak power consumption, since the power generation cost of the power grid is relatively low, the main power source of the charging station 23 is provided through the power grid as much as possible, and the power grid (and/or photovoltaic cells 22) can also be used for the energy storage system. 21 to charge, so that it can be in a fully charged state, can provide backup, redundant power demand.

本發明的電力供需非僅上述兩種狀況，由於電網有發電成本的考量、充電站23用電狀況的變動、光伏電池22因天候因素有其不穩定供電的特性以及儲能系統21儲能情況的不同，因此彼此透過控制機制的通訊與協同，可使 得每個裝置(單元)能夠發揮最佳的供電效能，使得電能管理與調度更具彈性，而可適用各種不同的電力供需狀況。 The power supply and demand of the present invention is not limited to the above two conditions. Due to the consideration of power generation cost in the power grid, changes in the power consumption of the charging station 23, the photovoltaic cell 22 has its unstable power supply characteristics due to weather factors, and the energy storage system 21 energy storage situation Is different, so through the communication and coordination of the control mechanism, it can make Each device (unit) can play the best power supply efficiency, making power management and dispatching more flexible, and can be applied to various power supply and demand conditions.

請參見圖4所示，其係為本發明應用於固態變壓器架構之電源裝置單一相連接之電路方塊圖。圖4所示三相電源系統其中一相的多個電源裝置連接的示意，並且單組電源裝置的配置為圖1C所示的：三個雙向直流轉換單元13的三個第二側單獨配置所形成匯流排數量為3的第二直流匯流排14。然圖4僅為本發明的其中一種實施方式，換言之，亦可透過單組電源裝置的配置為圖1A(匯流排數量為1)或者單組電源裝置的配置為圖1B(匯流排數量為2)的方式，組合成多組隔離直流電源的電源裝置單一相連接的架構。 Please refer to FIG. 4, which is a circuit block diagram of a single-phase connection of a power supply device with a solid-state transformer structure according to the present invention. Figure 4 shows a schematic diagram of the connection of multiple power supply devices in one phase of the three-phase power supply system, and the configuration of a single power supply device is shown in Figure 1C: the three second sides of the three bidirectional DC conversion units 13 are individually configured A second DC bus bar 14 with a number of three bus bars is formed. However, FIG. 4 is only one of the embodiments of the present invention. In other words, the configuration of a single power supply device is shown in Figure 1A (the number of buses is 1) or the configuration of a single power supply device is shown in Figure 1B (the number of buses is 2). ), combined into a single-phase connection structure for multiple groups of isolated DC power supply devices.

如圖4所示，交流電源Vac側係採串聯耦接方式，而各雙向直流轉換單元13之第二側係採並聯耦接方式。具體地，電源裝置的數量係由系統電壓與每一個電源裝置耐壓的比值所決定，舉例來說，當系統電壓的線間電壓是13.2kV(其相間電壓則是7.62kV)，若每一個電源裝置耐壓為0.847kV時，則每一相電源裝置的數量則可設計為九組。因此，此九組電源裝置的交流對直流轉換單元11採串聯耦接，而每一組電源裝置的雙向直流轉換單元13互為並聯耦接，以共同提供直流電壓至所對應的第二直流匯流排14，或者接收外部裝置提供至第二直流匯流排14的直流電壓。 As shown in FIG. 4, the AC power supply Vac side is coupled in series, and the second side of each bidirectional DC conversion unit 13 is coupled in parallel. Specifically, the number of power supply devices is determined by the ratio of the system voltage to the withstand voltage of each power supply device. For example, when the line-to-line voltage of the system voltage is 13.2kV (the phase-to-phase voltage is 7.62kV), if each When the withstand voltage of the power supply device is 0.847kV, the number of power supply devices for each phase can be designed as nine groups. Therefore, the AC-to-DC conversion units 11 of the nine groups of power supply devices are coupled in series, and the bidirectional DC conversion units 13 of each group of power supply devices are coupled in parallel to each other to jointly provide a DC voltage to the corresponding second DC bus. Or receive the DC voltage supplied to the second DC bus 14 from an external device.

請參見圖5所示，其係為本發明應用於固態變壓器架構之電源裝置三相連接之電路方塊圖。如圖4所示的每一相架構，可結合成三相多組的架構。具體地，交流電源Vac側係以Y接、中性點N接地的連接方式，而三相中電源裝置所對應的每一組可互相並聯耦接。以前述九組的每一相電源裝置數量為例，透過將三相結合，使得第一個27組(R相、S相、T相各9組)的雙向直流轉換單元13之第二側彼此並聯、第二個27組的雙向直流轉換單元13之第二側彼此並聯，以及第三個27組的雙向直流轉換單元13之第二側彼此並聯，如此， 可達到均壓且供電平衡的功效。承前所述，充電站23所需的電能可透過第一個27組的雙向直流轉換單元13所提供的直流電壓供應。其中，可以27組的雙向直流轉換單元13平均地提供充電站23所需的電能，或者比例地提供充電站23所需的電能，然不以所述的供電方式為限制本發明。 Please refer to FIG. 5, which is a circuit block diagram of the three-phase connection of the power supply device of the solid-state transformer architecture according to the present invention. Each phase structure shown in Figure 4 can be combined into a three-phase multi-group structure. Specifically, the AC power supply Vac side is connected in a Y connection and neutral point N is grounded, and each group of the three-phase power supply devices can be coupled in parallel with each other. Taking the number of power supply devices in each phase of the aforementioned nine groups as an example, by combining the three phases, the second sides of the bidirectional DC conversion units 13 of the first 27 groups (9 groups of R-phase, S-phase, and T-phase) are mutually connected to each other. In parallel, the second sides of the second 27 groups of bidirectional DC conversion units 13 are connected in parallel with each other, and the second sides of the third 27 groups of bidirectional DC conversion units 13 are connected in parallel with each other, so, It can achieve the effect of voltage equalization and power supply balance. As mentioned above, the electrical energy required by the charging station 23 can be supplied through the DC voltage provided by the first 27 sets of bidirectional DC conversion units 13. Wherein, 27 groups of two-way DC conversion units 13 can provide the electric energy required by the charging station 23 on average or proportionally provide the electric energy required by the charging station 23, but the present invention is not limited by the power supply mode described.

此外，三相電源系統中耦接每一相的該等交流對直流轉換單元11係以交錯相移(interleaved phase-shift)方式控制。舉例來說，若該些交流對直流轉換單元11的數量為三組，且每一組交流對直流轉換單元11係以10kHz進行切換控制，且相位角互差120度，則每一相的系統頻率可倍增為30kHz，藉此，可使每一組交流對直流轉換單元11有較低的切換頻率而能夠提高效率，並且使系統有較佳的總諧波失真(total harmonic distortion,THD)而可使用較小的濾波器元件。 In addition, the AC-to-DC conversion units 11 coupled to each phase in the three-phase power system are controlled in an interleaved phase-shift manner. For example, if the number of the AC-to-DC conversion units 11 is three groups, and each group of AC-to-DC conversion units 11 is switched at 10 kHz, and the phase angles differ by 120 degrees, the system of each phase The frequency can be doubled to 30kHz, so that each group of AC-to-DC conversion unit 11 can have a lower switching frequency to improve efficiency, and the system has better total harmonic distortion (THD) and Smaller filter components can be used.

綜上所述，本發明係具有以下之特徵與優點： In summary, the present invention has the following features and advantages:

1、透過具有功率傳輸功能的雙向直流轉換單元，可達到雙向功率潮流操作，以提高對外部裝置應用的共通性與彈性。 1. Through the two-way DC conversion unit with power transmission function, two-way power flow operation can be achieved to improve the commonality and flexibility of application to external devices.

2、可使用具有較佳轉換效率的單級轉換架構的雙向直流轉換單元，或者使用可提供較寬的轉換電壓範圍，可獲得較佳的電壓動態調節的兩級轉換架構的雙向直流轉換單元，以因應實際應用的需求。 2. A bidirectional DC conversion unit with a single-stage conversion architecture with better conversion efficiency can be used, or a bidirectional DC conversion unit with a two-stage conversion architecture that can provide a wider conversion voltage range and obtain better voltage dynamic adjustment. To meet the needs of practical applications.

3、為因應充電站、光伏電池，以及儲能系統對於不同電壓需求以及隔離需求，具有多組隔離直流電源的電源裝置可提供不同的電壓需求且滿足隔離需求，並且提高電力供需的彈性。 3. In response to the different voltage requirements and isolation requirements of charging stations, photovoltaic cells, and energy storage systems, power supply devices with multiple sets of isolated DC power supplies can provide different voltage requirements and meet isolation requirements, and improve the flexibility of power supply and demand.

4、透過將三相中電源裝置所對應的每一組互相並聯耦接，以達到均壓且供電平衡的功效。 4. By coupling each group corresponding to the three-phase power supply device in parallel with each other, the effect of voltage equalization and power supply balance can be achieved.

5、透過交錯相移方式控制每一相的該些交流對直流轉換單元，可使每一組交流對直流轉換單元有較低的切換頻率而能夠提高效率，並且使系統有較佳的總諧波失真而可使用較小的濾波器元件。 5. Controlling the AC-to-DC conversion units of each phase through the interleaving phase shift method can make each group of AC-to-DC conversion units have a lower switching frequency, which can improve efficiency and make the system have a better overall resonance. Wave distortion and smaller filter elements can be used.

以上所述，僅為本發明較佳具體實施例之詳細說明與圖式，惟本發明之特徵並不侷限於此，並非用以限制本發明，本發明之所有範圍應以下述之申請專利範圍為準，凡合於本發明申請專利範圍之精神與其類似變化之實施例，皆應包含於本發明之範疇中，任何熟悉該項技藝者在本發明之領域內，可輕易思及之變化或修飾皆可涵蓋在以下本案之專利範圍。 The above are only detailed descriptions and drawings of the preferred embodiments of the present invention. However, the features of the present invention are not limited to these, and are not intended to limit the present invention. The full scope of the present invention shall be within the scope of the following patent applications. As the standard, all embodiments that conform to the spirit of the patent application of the present invention and similar changes should be included in the scope of the present invention. Anyone familiar with the art in the field of the present invention can easily think of changes or Modifications can be covered in the following patent scope of this case.

11:交流對直流轉換單元 11: AC to DC conversion unit

12:第一直流匯流排 12: The first DC bus

13:雙向直流轉換單元 13: Bidirectional DC conversion unit

14:第二直流匯流排 14: The second DC bus

Vac:交流電源 Vac: AC power

Vb:匯流排電壓 Vb: bus voltage

Claims (11)

一種應用於固態變壓器架構之電源裝置，該電源裝置包含：一交流對直流轉換單元，具有一第一側與一第二側，其中該交流對直流轉換單元之該第一側耦接一交流電源；一第一直流匯流排，耦接該交流對直流轉換單元之該第二側，且具有一匯流排電壓；及複數雙向直流轉換單元，各該雙向直流轉換單元具有一第一側與一第二側，且為單級轉換架構或者兩級轉換架構，其中該等雙向直流轉換單元之該等第一側耦接該第一直流匯流排，該等雙向直流轉換單元之該等第二側配置形成至少一第二直流匯流排，該至少一第二直流匯流排的數量為一匯流排數量；其中，該等雙向直流轉換單元接收該匯流排電壓，且轉換該匯流排電壓為與該匯流排數量相同的至少一直流電壓，或者該等雙向直流轉換單元接收與該匯流排數量相同的至少一外部直流電壓，且轉換該至少一外部直流電壓為該匯流排電壓，以提供該第一直流匯流排與該至少一第二直流匯流排之間的雙向電源轉換。 A power supply device applied to a solid-state transformer architecture, the power supply device comprising: an AC-to-DC conversion unit having a first side and a second side, wherein the first side of the AC-to-DC conversion unit is coupled to an AC power supply ; A first DC bus, coupled to the second side of the AC to DC conversion unit, and has a bus voltage; and a plurality of bidirectional DC conversion units, each of the bidirectional DC conversion unit has a first side and a The second side is a single-stage conversion structure or a two-stage conversion structure, wherein the first sides of the bidirectional DC conversion units are coupled to the first DC bus bar, and the second sides of the bidirectional DC conversion units The side configuration forms at least one second DC bus bar, and the number of the at least one second DC bus bar is a bus bar number; wherein the two-way DC conversion units receive the bus bar voltage and convert the bus bar voltage to the same At least DC voltages with the same number of bus bars, or the two-way DC conversion units receive at least one external DC voltage with the same number of bus bars, and convert the at least one external DC voltage to the bus bar voltage to provide the first Bidirectional power conversion between the DC bus and the at least one second DC bus. 如申請專利範圍第1項所述應用於固態變壓器架構之電源裝置，其中各該雙向直流轉換單元包含：一第一級轉換電路，包含：一隔離變壓器，具有一初級側與一次級側；一初級側諧振電路，耦接該初級側；及一次級側諧振電路，耦接該次級側。 As described in the first item of the scope of patent application, the power supply device applied to the solid-state transformer architecture, wherein each of the bidirectional DC conversion units includes: a first-stage conversion circuit, including: an isolation transformer having a primary side and a secondary side; The primary side resonant circuit is coupled to the primary side; and the primary side resonant circuit is coupled to the secondary side. 如申請專利範圍第1項所述應用於固態變壓器架構之電源裝置，其中各該雙向直流轉換單元包含：一第一級轉換電路，包含：一隔離變壓器，具有一初級側與一次級側；一初級側諧振電路，耦接該初級側；及一次級側諧振電路，耦接該次級側；及一第二級轉換電路，耦接該次級側諧振電路，其中該第二級轉換電路係為一升壓/降壓電路。 As described in the first item of the scope of patent application, the power supply device applied to the solid-state transformer architecture, wherein each of the bidirectional DC conversion units includes: a first-stage conversion circuit, including: an isolation transformer having a primary side and a secondary side; A primary side resonant circuit coupled to the primary side; and a primary side resonant circuit coupled to the secondary side; and a second-level conversion circuit coupled to the secondary side resonant circuit, wherein the second-level conversion circuit is It is a step-up/step-down circuit. 如申請專利範圍第1項所述應用於固態變壓器架構之電源裝置，其中該等雙向直流轉換單元之該等第二側係透過預先配線或透過開關切換，以配置形成該至少一第二直流匯流排。 As described in the first item of the scope of patent application, the power supply device applied to the solid-state transformer structure, wherein the second sides of the two-way DC conversion units are pre-wired or switched through switches to form the at least one second DC bus row. 如申請專利範圍第1項所述應用於固態變壓器架構之電源裝置，其中若該等雙向直流轉換單元的數量為N，該匯流排數量為1~N。 As described in the first item of the scope of patent application, the power supply device applied to the solid-state transformer structure, wherein if the number of the bidirectional DC conversion units is N, the number of the busbars is 1~N. 如申請專利範圍第1項所述應用於固態變壓器架構之電源裝置，其中該至少一第二直流匯流排係耦接一充電站、一光伏電池以及一儲能系統的其中至少一者。 As described in the first item of the scope of patent application, the power supply device applied to the solid-state transformer architecture, wherein the at least one second DC bus is coupled to at least one of a charging station, a photovoltaic cell, and an energy storage system. 如申請專利範圍第6項所述應用於固態變壓器架構之電源裝置，其中該充電站透過一充電站轉換器耦接該至少一第二直流匯流排、該光伏電池透過一光伏電池轉換器耦接該至少一第二直流匯流排以及該儲能系統透過一儲能系統轉換器耦接該至少一第二直流匯流排。 As described in item 6 of the scope of patent application, the power supply device applied to the solid-state transformer structure, wherein the charging station is coupled to the at least one second DC bus through a charging station converter, and the photovoltaic cell is coupled through a photovoltaic cell converter The at least one second DC bus bar and the energy storage system are coupled to the at least one second DC bus bar through an energy storage system converter. 一種應用於固態變壓器架構之三相電源系統，其中任一相交流電源串聯耦接複數個如專利範圍第1項至第7項中任一項之該電源裝置的該等交流對直流轉換單元，且該等雙向直流轉換單元之該等第二側並聯耦接。 A three-phase power system applied to a solid-state transformer architecture, in which any phase AC power supply is coupled in series with a plurality of the AC-to-DC conversion units of the power supply device as in any one of the scope of patent items 1 to 7, And the second sides of the bidirectional DC conversion units are coupled in parallel. 如申請專利範圍第8項所述應用於固態變壓器架構之三相電源系統，其中三相交流電源中各相對應的該等雙向直流轉換單元之該等第二側並聯耦接。 As described in item 8 of the scope of patent application, the three-phase power supply system applied to the solid-state transformer architecture, wherein the second sides of the corresponding two-way DC conversion units in the three-phase AC power supply are coupled in parallel. 如申請專利範圍第8項所述應用於固態變壓器架構之三相電源系統，其中耦接每一相的該等交流對直流轉換單元係以交錯相移方式控制。 As described in item 8 of the scope of patent application, the three-phase power system applied to the solid-state transformer architecture, wherein the AC-to-DC conversion units coupled to each phase are controlled in a staggered phase shift manner. 如申請專利範圍第8項所述應用於固態變壓器架構之三相電源系統，其中每一相耦接複數個電源裝置的數量係由系統電壓與每一個電源裝置耐壓的比值所決定。 As described in item 8 of the scope of patent application, the three-phase power supply system applied to the solid-state transformer architecture, wherein the number of power supply devices coupled to each phase is determined by the ratio of the system voltage to the withstand voltage of each power supply device.
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