TWI699065B

TWI699065B - Power system applied to solid state transformer structure with communication function and communication module applied to solid state transformer structure

Info

Publication number: TWI699065B
Application number: TW108133985A
Authority: TW
Inventors: 李聖華
Original assignee: 台達電子工業股份有限公司
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-07-11
Also published as: TW202114323A

Abstract

A power system applied to a solid state transformer structure with communication function includes a plurality of conversion units, a bus path, a communication module and a control module. The plurality of conversion units are coupled to the bus path and the communication module, and the communication module is coupled to the control module. The communication module includes a plurality of coupling units. The plurality of coupling units are coupled in series and each coupling unit is correspondingly coupled to a control unit of each conversion unit, and an initial coupling unit at a start end of the plurality of series-connected coupling units is coupled to the control module.

Description

應用於固態變壓器架構且具有通訊功能之電力系統及應用於固態變壓器架構之通訊模組 Applied to power systems with solid-state transformer architecture and communication functions and applications Communication module of solid-state transformer architecture

本發明係有關一種應用於固態變壓器架構且具有通訊功能之電力系統，尤指一種降低通訊線路配線難度的電力系統。 The present invention relates to a power system that is applied to a solid-state transformer structure and has a communication function, in particular to a power system that reduces the wiring difficulty of communication lines.

傳統電網中的電力轉換，是使用體積龐大、油浸式的傳統變壓器，近年來，許多單位致力於研究及開發固態變壓器(solid-state transformer,SST)，其為將電力電子轉換技術及電磁感應原理的高頻電能變換器技術做結合，使電力轉換模塊操作在中高頻，進而大幅縮小體積。由於固態變壓器取代了電網中的傳統變壓器，其輸入端需承受高電壓，例如但不限於，三相交流電輸入為Y接三相四線式的電網中，三相交流的線電壓為13.2kV，每相電壓為7.62kV。因此每一相固態變壓器的輸入端需要承受7.62kV的交流電壓，再經由多組電力模塊以輸入端串聯的方式接收交流電壓。其中，各組電力模塊分別具有各自的控制單元，再由一個系統控制模組與各電力模塊中的控制單元做溝通。而控制模組與控制單元間會進行電氣隔離。 The power conversion in the traditional power grid uses a bulky, oil-immersed traditional transformer. In recent years, many units have devoted themselves to the research and development of solid-state transformer (SST), which is the conversion technology of power electronics and electromagnetic induction. The principle of high-frequency power converter technology is combined to enable the power conversion module to operate at medium and high frequencies, thereby greatly reducing the size. Since the solid-state transformer replaces the traditional transformer in the power grid, its input needs to withstand high voltage. For example, but not limited to, the three-phase AC input is Y-connected to the three-phase four-wire power grid, and the line voltage of the three-phase AC is 13.2kV. The voltage of each phase is 7.62kV. Therefore, the input end of each phase of the solid-state transformer needs to withstand an AC voltage of 7.62kV, and then receive the AC voltage in series with the input ends through multiple sets of power modules. Among them, each group of power modules has There are separate control units, and a system control module communicates with the control units in each power module. The control module and the control unit will be electrically isolated.

習知的固態變壓器應用，主要是以光纖線路耦接系統控制模組與各組電力模塊中的控制器，以進行具有電氣隔離的訊號傳遞。但是，光纖具有物理強度差，非常容易折斷以及建置成本高的缺點。將光纖設計在固態變壓器的機櫃中容易因機櫃空間有限，且配線數量太多的情況下，造成光纖連接困難且易產生斷裂的風險。 The conventional solid-state transformer application mainly uses optical fiber lines to couple the system control module and the controllers in each group of power modules to transmit signals with electrical isolation. However, optical fibers have the disadvantages of poor physical strength, very easy to break, and high construction costs. The design of optical fiber in the cabinet of the solid-state transformer is likely to cause the difficulty of optical fiber connection and the risk of breakage due to the limited space of the cabinet and too much wiring.

因此，如何設計出一種應用於固態變壓器架構且具有通訊功能之電力系統，利用光耦合器搭配獨特的配線方式進行固態變壓器中各控制模組間的電氣隔離，乃為本案發明人所欲行研究的重要課題。 Therefore, how to design a power system with a communication function applied to a solid-state transformer architecture and use optocouplers with a unique wiring method for electrical isolation between the control modules in the solid-state transformer is the subject of the inventor’s research. Important subject.

為了解決上述問題，本發明係提供一種應用於固態變壓器架構且具有通訊功能之電力系統，以克服習知技術的問題。因此，本發明之電力系統包括：轉換模組，包括複數個轉換單元，每個轉換單元包括輸入端、輸出端及控制單元，且每個轉換單元的輸入端串聯耦接交流電源。匯流排路徑，耦接每個轉換單元的輸出端。通訊模組，包括：複數個耦合單元，每個耦合單元分別包括訊號輸入端與訊號輸出端，耦合單元以一個耦合單元的訊號輸出端耦接另一個耦合單元的訊號輸入端的方式串聯耦接，且每個耦合單元的訊號輸出端對應地耦接每個轉換單元的控制單元。及控制模組，耦接耦合單元中，串接頭端的起始耦合單元的訊號輸入端。 In order to solve the above-mentioned problems, the present invention provides a power system with a communication function applied to a solid-state transformer architecture to overcome the problems of the conventional technology. Therefore, the power system of the present invention includes: a conversion module including a plurality of conversion units, each conversion unit includes an input end, an output end, and a control unit, and the input end of each conversion unit is coupled to an AC power supply in series. The bus path is coupled to the output terminal of each conversion unit. The communication module includes a plurality of coupling units, each coupling unit includes a signal input terminal and a signal output terminal respectively, and the coupling units are coupled in series in a manner that the signal output terminal of one coupling unit is coupled to the signal input terminal of another coupling unit, And the signal output terminal of each coupling unit is correspondingly coupled to the control unit of each conversion unit. And the control module, which is coupled to the signal input end of the initial coupling unit at the serial connection end in the coupling unit.

為了解決上述問題，本發明係提供一種應用於固態變壓器架構之通訊模組，以克服習知技術的問題。因此，本發明之通訊模組，耦接轉換模組中的複數個轉換單元與控制模組，且每個轉換單元包括控制單元，通訊模組包括：複數個耦合單元，每個耦合單元分別包括訊號輸入端與訊號輸出端，耦合單元以一個耦合單元的訊號輸出端耦接另一個耦合單元的訊號輸入端的方式串聯耦接，且每個耦合單元的訊號輸出端對應地耦接每個轉換單元的控制單元。其中，耦合單元中，串接頭端的起始耦合單元的訊號輸入端耦接控制模組。 In order to solve the above-mentioned problems, the present invention provides a communication module applied to the solid-state transformer architecture to overcome the problems of the conventional technology. Therefore, the communication module of the present invention is coupled to a plurality of conversion units in the conversion module and the control module, and each conversion unit includes a control unit, and the communication module includes a plurality of coupling units, and each coupling unit includes The signal input terminal and the signal output terminal are coupled in series in a manner that the signal output terminal of one coupling unit is coupled to the signal input terminal of the other coupling unit, and the signal output terminal of each coupling unit is correspondingly coupled to each conversion unit Control unit. Among them, in the coupling unit, the signal input end of the initial coupling unit at the serial connection end is coupled to the control module.

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 further understand the technology, means and effects of 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 For specific understanding, the accompanying drawings are only provided for reference and illustration, and are not intended to limit the present invention.

1:三相電力系統 1: Three-phase power system

R、S、T:火線 R, S, T: FireWire

N:中性點 N: neutral point

100、100A、100B、100C:電力系統 100, 100A, 100B, 100C: power system

10:轉換模組 10: Conversion module

12-1~12-n:轉換單元 12-1~12-n: Conversion unit

122:輸入端 122: input

124:輸出端 124: output

126:控制單元 126: Control Unit

20:匯流排路徑 20: Bus path

30:轉換電路 30: Conversion circuit

40:控制模組 40: control module

50:通訊模組 50: Communication module

52-1~52-n:耦合單元 52-1~52-n: coupling unit

522:訊號輸入端 522: signal input

524:訊號輸出端 524: signal output terminal

200:負載 200: load

Vin:三相交流電源 Vin: Three-phase AC power supply

Vac、Vac1、Vac2、Vac3:交流電源 Vac, Vac1, Vac2, Vac3: AC power

Vl:負載電源 Vl: Load power supply

Vbus:總線電源 Vbus: bus power

Sc、Sc1~Scn:控制訊號 Sc, Sc1~Scn: control signal

圖1為本發明三相電力系統之電路方塊示意圖；圖2為本發明應用於固態變壓器架構且具有通訊功能之電力系統之電路方塊示意圖；圖3為本發明通訊模組耦接轉換模組第一實施例之電路方塊示意圖；及圖4為本發明通訊模組耦接轉換模組第二實施例之電路方塊示意圖。 Fig. 1 is a schematic diagram of a circuit block diagram of a three-phase power system of the present invention; Fig. 2 is a schematic diagram of a circuit block diagram of a power system with a communication function applied to a solid-state transformer structure according to the present invention; A circuit block diagram of an embodiment; and FIG. 4 is a circuit block diagram of a second embodiment of the communication module coupled to the conversion module of the present invention.

茲有關本發明之技術內容及詳細說明，配合圖式說明如下：請參閱圖1為本發明三相電力系統之電路方塊示意圖。三相電力系統1包括3組應用於固態變壓器架構且具有通訊功能之電力系統(100A、100B、100C)，且每組電力系統(100A、100B、100C)分別耦接三相交流電源Vin中其中一相的交流電源(Vac1、Vac2、Vac3)，以分別將交流電源(Vac1、Vac2、Vac3)轉換為負載電源Vl對複數個負載200供電。其中，三相交流電源Vin為中、高壓電源系統，例如本說明書之實施例中，其線電壓為13.2kV的交流電壓，即每相電壓為7.62kV。值得一提，於本發明中，交流電源Vin不限定為單相或三相，也不限定為Y接或△接的結構；而負載200可為各組電力系統各自接一個或多個負載200，也可以所有電力系統耦接一個共同負載200，端看電力系統供應電力及負載需求電力的搭配組合。圖1僅為三相交流電源Vin為Y接的示意性範例。 The technical content and detailed description of the present invention are described as follows with the drawings: Please refer to FIG. 1 for a block diagram of the circuit of the three-phase power system of the present invention. The three-phase power system 1 includes 3 groups of power systems (100A, 100B, 100C) that are applied to the solid-state transformer architecture and have communication functions, and each group of power systems (100A, 100B, 100C) is respectively coupled to the three-phase AC power supply Vin. One-phase AC power (Vac1, Vac2, Vac3) is used to convert the AC power (Vac1, Vac2, Vac3) into load power V1 to supply power to a plurality of loads 200. Among them, the three-phase AC power supply Vin is a medium and high-voltage power supply system. For example, in the embodiment of this specification, the line voltage is an AC voltage of 13.2kV, that is, the voltage per phase is 7.62kV. It is worth mentioning that in the present invention, the AC power supply Vin is not limited to single-phase or three-phase, nor is it limited to a Y-connected or delta-connected structure; and the load 200 can be one or more loads 200 for each group of power systems. It is also possible that all power systems are coupled to a common load 200, depending on the combination of the power supply power of the power system and the power demanded by the load. Figure 1 is only a schematic example in which the three-phase AC power supply Vin is Y connected.

請參閱圖2為本發明應用於固態變壓器架構且具有通訊功能之電力系統之電路方塊示意圖，復配合參閱圖1。電力系統100包括轉換模組10、匯流排路徑20、轉換電路30及控制模組40。匯流排路徑20耦接轉換模組10與轉換電路30，且控制模組40耦接轉換模組10。轉換模組10接收交流電源Vac，且控制模組40控制轉換模組10將交流電源Vac轉換為總線電源Vbus或控制其轉換模組的10電力調配等。轉換電路30通過匯流排路徑20接收總線電源Vbus，且將總線電源Vbus轉換為負載電源Vl對負載200供電。值得一提，於本發明之一實施例中，電力系統(100A、100B、100C)也可由負載200反向饋電至交流電源Vac，其路徑恰與充電相反，在此不再加以贅述。 Please refer to FIG. 2 for a circuit block diagram of a power system with a communication function applied to a solid-state transformer structure according to the present invention. The power system 100 includes a conversion module 10, a bus path 20, a conversion circuit 30 and a control module 40. The bus path 20 is coupled to the conversion module 10 and the conversion circuit 30, and the control module 40 is coupled to the conversion module 10. The conversion module 10 receives the AC power Vac, and the control module 40 controls the conversion module 10 to convert the AC power Vac into the bus power Vbus or controls the power distribution of the conversion module 10, etc. The conversion circuit 30 receives the bus power Vbus through the bus path 20, and converts the bus power Vbus into the load power V1 to supply power to the load 200. It is worth mentioning that, in an embodiment of the present invention, the power system (100A, 100B, 100C) can also be back-fed to the AC power supply Vac by the load 200, and the path is the opposite of charging, which will not be repeated here.

具體而言，轉換模組10包括複數個轉換單元12-1~12-n，且每個轉換單元12-1~12-n包括輸入端122、輸出端124及控制單元126。每個轉換單元12-1~12-n的輸入端122串聯耦接，且串接頭端的起始轉換單元12-1耦接交流電源Vac的火線(R、S、T，在此以R相為示意性的範例)，串接尾端的結尾轉換單元12-n耦接中性點N。由於此連接結構的關係，使得轉換單元12-1~12-n理想上為平均分配交流電源Vac。每個轉換單元12-1~12-n的輸出端124耦接匯流排路徑20，且電力系統(100A、100B、100C)中的匯流排路徑20(如圖2所示)可耦接在同一點，或為各自獨立的路徑。 Specifically, the conversion module 10 includes a plurality of conversion units 12-1 to 12-n, and each conversion unit 12-1 to 12-n includes an input terminal 122, an output terminal 124 and a control unit 126. The input terminal 122 of each conversion unit 12-1~12-n is coupled in series, and the initial conversion unit 12-1 at the series connection end is coupled to the live wires (R, S, T of the AC power supply Vac, where R phase is taken as Schematic example), the end conversion sheet connected to the end Element 12-n is coupled to neutral point N. Due to this connection structure, the conversion units 12-1 to 12-n ideally distribute the AC power Vac evenly. The output terminal 124 of each conversion unit 12-1~12-n is coupled to the bus path 20, and the bus path 20 (as shown in FIG. 2) in the power system (100A, 100B, 100C) can be coupled to the same One point, or separate paths.

轉換模組10可為固態變壓器(Solid State Transformer；SST)，固態變壓器是一種適於智能電網應用的新型智能變壓器，其主要是取代傳統高壓電所使用體積龐大、油浸式的傳統變壓器。具體而言，傳統變壓器通常為了耐受低頻的高壓電，因此需要線徑夠粗的線材繞成變壓器，方可耐受低頻的高壓電。因此傳統變壓器的體積龐大，無法應用於空間有限的環境之中。由於本發明之轉換模組10內部具有輸入端串接的複數個轉換單元12-1~12-n，且由於複數個轉換單元12-1~12-n工作在高頻切換的環境，因此複數個轉換單元12-1~12-n的體積較小。故此，固態變壓器的體積小於傳統高壓電所使用的變壓器。其不僅可以實現電壓轉換(高壓與低壓之間的轉換)、電器隔離、故障隔離等功能，還能夠實現傳統變壓器所不能實現的頻率變換(直流電與交流電之間的變換)。而且，固態變壓器同時具有交流和直流環節，可實現直流低壓、直流高壓、交流低壓、交流高壓等狀態之間的轉換。因此在本發明交流電源Vac為中、高壓電的場合(例如但不限於，4.8kV~35kV)，特別適合應用固態變壓器做高壓與低壓之間的雙向轉換。如此，克服了傳統的變壓器只適用於單一頻率、單向電壓傳遞，而無法雙向地轉換電壓的缺點。 The conversion module 10 may be a solid state transformer (Solid State Transformer; SST). The solid state transformer is a new type of smart transformer suitable for smart grid applications, and it is mainly used to replace the bulky, oil-immersed traditional transformer used in traditional high voltage power. To be specific, traditional transformers usually in order to withstand low-frequency high-voltage electricity, and therefore require a wire with a thick enough wire diameter to be wound into a transformer to withstand low-frequency high-voltage electricity. Therefore, traditional transformers are bulky and cannot be used in environments with limited space. Since the conversion module 10 of the present invention has a plurality of conversion units 12-1~12-n connected in series with the input end, and since the plurality of conversion units 12-1~12-n work in a high-frequency switching environment, The volume of each conversion unit 12-1~12-n is small. Therefore, the volume of the solid-state transformer is smaller than the transformer used in traditional high-voltage power. It can not only realize the functions of voltage conversion (conversion between high voltage and low voltage), electrical isolation, and fault isolation, but also realize frequency conversion (conversion between direct current and alternating current) that cannot be achieved by traditional transformers. Moreover, the solid-state transformer has both AC and DC links, which can realize the conversion between DC low voltage, DC high voltage, AC low voltage, AC high voltage and other states. Therefore, when the AC power supply Vac of the present invention is medium or high voltage (for example, but not limited to, 4.8 kV to 35 kV), it is particularly suitable for applying solid-state transformers for bidirectional conversion between high voltage and low voltage. In this way, it overcomes the shortcoming that the traditional transformer is only suitable for single frequency and unidirectional voltage transmission, but cannot convert the voltage in both directions.

控制模組40耦接每個轉換單元12-1~12-n中的控制單元126，且通過控制訊號Sc與控制單元126相互通訊。控制單元126控制轉換單元12-1~12-n將交流電源Vac轉換為總線電源Vbus，且穩定轉換單元12-1~12-n所提供的總線電源Vbus的電壓值(或控制每個轉換單元12-1~12-n將總線電源Vbus轉換為交流電源Vac，且將交流電源Vac饋送回電網)。控制模組40通過控制訊號Sc得知控制單元126目前的狀況，且通過控制訊號Sc控制控制單元126調整轉換單元12-1~12-n的輸出電流，使得每個轉換單元12-1~12-n的輸出電流均流或依需求調配。轉換電路30內部可以包括單個或複數個轉換器(圖未式)，且轉換器可為直流/直流轉換器或直流/交流轉換器(根據負載200的需求而定)。轉換電路30耦接匯流排路徑20與負載200，其可耦接負載200的數量根據轉換器的數量所決定。轉換電路30可根據電力系統(100A、100B、100C)的電力配置將總線電源Vbus轉換為負載電源Vl，且提供負載電源Vl至負載200(或將負載電源Vl轉換為總線電源Vbus，且提供總線電源Vbus至轉換模組10)。值得一提，於本發明之一實施例中，轉換電路30可依實際需求而被省略。意即，當匯流排路徑20所提供的總線電源Vbus可以作為負載運作的電力時，則轉換電路30可以被省略，使得負載200直接耦接匯流排路徑20。 The control module 40 is coupled to the control unit 126 in each of the conversion units 12-1 to 12-n, and communicates with the control unit 126 via a control signal Sc. The control unit 126 controls the conversion unit 12-1~12-n to convert the AC power supply Vac to the bus power Vbus, and stabilizes the voltage value of the bus power Vbus provided by the conversion unit 12-1~12-n (or controls each conversion unit 12-1~12-n convert the bus power Vbus to AC power Vac, and feed the AC power Vac back to the grid). The control module 40 knows the control through the control signal Sc The current status of the unit 126, and the control unit 126 is controlled by the control signal Sc to adjust the output current of the conversion units 12-1~12-n, so that the output current of each conversion unit 12-1~12-n flows evenly or is adjusted according to requirements . The conversion circuit 30 may include a single or multiple converters (not shown in the figure), and the converters may be DC/DC converters or DC/AC converters (depending on the requirements of the load 200). The conversion circuit 30 is coupled to the bus path 20 and the load 200, and the number of the load 200 that can be coupled to it is determined according to the number of converters. The conversion circuit 30 can convert the bus power Vbus to the load power V1 according to the power configuration of the power system (100A, 100B, 100C), and provide the load power V1 to the load 200 (or convert the load power V1 to the bus power Vbus, and provide the bus Power Vbus to the conversion module 10). It is worth mentioning that in an embodiment of the present invention, the conversion circuit 30 can be omitted according to actual requirements. That is, when the bus power Vbus provided by the bus path 20 can be used as power for the load operation, the conversion circuit 30 can be omitted, so that the load 200 is directly coupled to the bus path 20.

習知之每個轉換單元12-1~12-n中的控制單元126與控制模組40之間的通訊，是採用一對一的方式，也就是每個控制單元126都會有一條訊號線接到控制模組40。由於電力系統(100A、100B、100C)所接收的電壓為幾kV到幾十kV等級，但控制模組40為人員所會接觸到的控制設備，需處於安全電壓(Safety Extra-Low Voltage；SELV)的工作環境。具體而言，安全電壓的工作環境即為工作環境與地及其他系統作電氣性分隔的特低壓的工作環境，其電氣隔離可避免發生單一的故障時引起人員觸電的危險，其中，安全電壓通常設定在例如但不限於50V以下的工作環境。為達到電氣隔離，習知的作法，訊號線會採用光纖線路做訊號傳輸，但由於控制模組40與控制單元126為一對一接線，故假設轉換單元有10台，就會需要配置10條光纖線路。為簡化配線方式及空間利用，於本發明中，使用通訊模組50進行中、高電壓工作環境與安全電壓工作環境的電氣隔離。其中，通訊模組50耦接控制模組40與每個轉換單元12-1~12-n中的控制單元126。 Conventionally, the communication between the control unit 126 and the control module 40 in each conversion unit 12-1~12-n is in a one-to-one manner, that is, each control unit 126 has a signal line connected to it Control module 40. Since the voltage received by the power system (100A, 100B, 100C) is from several kV to several tens of kV, the control module 40 is a control device that personnel will touch and needs to be at a safety extra-low voltage (SELV). ) Working environment. Specifically, the working environment of safe voltage is an extra-low voltage working environment where the working environment is electrically separated from the ground and other systems. The electrical isolation can avoid the danger of electric shock when a single fault occurs. Among them, the safe voltage is usually Set in a working environment such as but not limited to 50V or less. In order to achieve electrical isolation, the conventional method uses optical fiber lines for signal transmission. However, since the control module 40 and the control unit 126 are connected one-to-one, assuming there are 10 conversion units, 10 conversion units are required. Optical fiber line. In order to simplify the wiring method and space utilization, in the present invention, the communication module 50 is used to electrically isolate the medium and high voltage working environment from the safe voltage working environment. The communication module 50 is coupled to the control module 40 and the control unit 126 in each of the conversion units 12-1 to 12-n.

當控制模組40欲控制控制單元126時，控制模組40提供控制訊號Sc至通訊模組50，且控制單元126由通訊模組50分別取得自我所屬的控制訊號Sc1~Scn。當控制單元126欲回傳資訊至控制模組40時，控制單元126提供自我所屬的控制訊號Sc1~Scn至通訊模組50，通訊模組50將控制訊號Sc1~Scn整合為控制訊號Sc，且提供控制訊號Sc至控制模組40。值得一提，於本發明之一實施例中，每個電力系統(100A、100B、100C)皆包含一個控制模組40，但不以此為限。換言之，三組電力系統(100A、100B、100C)也可整合為單一個控制模組40，使單一個控制模組40共同地控制三組電力系統(100A、100B、100C)。 When the control module 40 wants to control the control unit 126, the control module 40 provides the control signal Sc to the communication module 50, and the control unit 126 obtains its own control signals Sc1~Scn from the communication module 50, respectively. When the control unit 126 wants to return information to the control module 40, the control unit 126 provides its own control signals Sc1~Scn to the communication module 50, and the communication module 50 integrates the control signals Sc1~Scn into the control signal Sc, and The control signal Sc is provided to the control module 40. It is worth mentioning that, in an embodiment of the present invention, each power system (100A, 100B, 100C) includes a control module 40, but it is not limited thereto. In other words, the three groups of power systems (100A, 100B, 100C) can also be integrated into a single control module 40 so that a single control module 40 can collectively control the three groups of power systems (100A, 100B, 100C).

請參閱圖3為本發明通訊模組耦接轉換模組第一實施例之電路方塊示意圖，復配合參閱圖1~2。通訊模組50包括複數個耦合單元52-1~52-n，且每個耦合單元52-1~52-n分別包括訊號輸入端522與訊號輸出端524。耦合單元52-1~52-n以一個耦合單元52-1~52-n的訊號輸出端524耦接另一個耦合單元52-1~52-n的訊號輸入端522的方式串聯耦接(意即，耦合單元52-1~52-n係以串聯的方式耦接)，且每個耦合單元52-1~52-n的訊號輸出端524對應地耦接每個轉換單元12-1~12-n的控制單元126。耦合單元52-1~52-n中，串接頭端的起始耦合單元52-1的訊號輸入端522耦接控制模組40。 Please refer to FIG. 3 for a circuit block diagram of the first embodiment of the communication module coupled to the conversion module of the present invention. The communication module 50 includes a plurality of coupling units 52-1 to 52-n, and each of the coupling units 52-1 to 52-n includes a signal input terminal 522 and a signal output terminal 524, respectively. The coupling units 52-1~52-n are coupled in series in a manner that the signal output end 524 of one coupling unit 52-1~52-n is coupled to the signal input end 522 of the other coupling unit 52-1~52-n (meaning That is, the coupling units 52-1~52-n are coupled in series), and the signal output terminal 524 of each coupling unit 52-1~52-n is correspondingly coupled to each conversion unit 12-1~12 -n of the control unit 126. Among the coupling units 52-1 to 52-n, the signal input end 522 of the initial coupling unit 52-1 at the serial end is coupled to the control module 40.

由於控制模組40在傳輸一次的控制訊號Sc時，需供應給複數個控制單元126，因此控制模組40在一單位時間需傳送包括複數個封包的控制訊號Sc至起始耦合單元52-1。起始轉換單元12-1中的控制單元126由起始耦合單元52-1取得自我所屬的控制訊號Sc1，且起始耦合單元52-1將包括剩餘封包的控制訊號Sc提供至耦合單元52-2，後續依此類推。由於控制訊號Sc中，封包的數量等於轉換單元12-1~12-n的數量，因此每個轉換單元12-1~12-n的控制單元126皆有對應可接收的封包。值得一提，當控制單元126回傳控制訊號Sc1~Scn時，其傳輸方式相同，且路徑恰巧相反，在此不再加以贅述。 Since the control module 40 needs to supply a plurality of control units 126 when transmitting a control signal Sc once, the control module 40 needs to transmit a control signal Sc including a plurality of packets to the initial coupling unit 52-1 per unit time. . The control unit 126 in the initial conversion unit 12-1 obtains its own control signal Sc1 from the initial coupling unit 52-1, and the initial coupling unit 52-1 provides the control signal Sc including the remaining packets to the coupling unit 52- 2. Follow-up and so on. Since the number of packets in the control signal Sc is equal to the number of conversion units 12-1 to 12-n, the control unit 126 of each conversion unit 12-1 to 12-n has corresponding receivable packets. It is worth mentioning that when the control unit 126 returns the control signal Sc1~Scn, the transmission mode is the same, and the path is exactly the opposite, so it will not be repeated here.

進一步而言，耦合單元52-1~52-n為光耦合器。光耦合器的特點在於，通過光耦合傳輸的特性，使得光耦合器兩端的訊號電氣隔離。由於電力系統(100A、100B、100C)通常設置在空間有限的機櫃中。當使用同樣有電氣隔離功能的光纖線路時，由於機櫃的空間有限及線路複雜之故，光纖線路的配置不易，且容易因為過度的彎折而斷裂。由於本發明之通訊模組50的線路配置是使用耦合單元52-1~52-n串聯耦接的特性，使得配置耦接於控制模組40與控制單元126的線路減少，因此可以降低通訊模組50配置於機櫃中的複雜度。意即，本發明之控制模組40耦接至耦合單元52-1的通訊線路雖然仍然使用光纖線路，但耦合單元52-1~52-n至轉換模組10的通訊線路可以不需要使用光纖線路，而是使用一般的導線即可。由於光耦合器在配置成本相較於光纖的線路低，因此除了可降低通訊模組50配置於機櫃中的複雜度及所佔空間之外，更可以降低配置成本。 Furthermore, the coupling units 52-1 to 52-n are optical couplers. The characteristic of the optocoupler is that the signal at both ends of the optocoupler is electrically isolated by the characteristics of optical coupling transmission. Because the power system (100A, 100B, 100C) is usually installed in a cabinet with limited space. When using optical fiber lines that also have electrical isolation, due to the limited space of the cabinet and the complexity of the lines, the configuration of the optical fiber lines is not easy, and it is easy to break due to excessive bending. Since the circuit configuration of the communication module 50 of the present invention uses the characteristics of the coupling units 52-1 to 52-n that are coupled in series, the number of circuits that are configured to be coupled to the control module 40 and the control unit 126 is reduced, thereby reducing the communication mode. The complexity of group 50 being deployed in the cabinet. That is, although the communication line of the control module 40 of the present invention coupled to the coupling unit 52-1 still uses optical fiber lines, the communication lines from the coupling units 52-1~52-n to the conversion module 10 do not need to use optical fibers. Line, but use ordinary wires. Since the configuration cost of the optical coupler is lower than that of the optical fiber line, in addition to reducing the complexity and space occupied by the communication module 50 in the cabinet, the configuration cost can also be reduced.

請參閱圖4為本發明通訊模組耦接轉換模組第二實施例之電路方塊示意圖，復配合參閱圖1~2。本實施例與圖3的第一實施例差異在於，結尾轉換單元12-n的控制單元126耦接起始耦合單元52-1的訊號輸出端524。具體而言，當結尾轉換單元12-n輸入端122的其中一點耦接中性點N，火線R對中性點N的壓差高達7.62kV。但是由於本發明之通訊模組50的線路配置是使用耦合單元52-1~52-n串聯耦接的特性，因此可以如同轉換單元12-1~12-n般的平均分配總耐壓值。總耐壓值對應交流電源Vac的電壓值，意即若火線R對中性點N的壓差高達7.62kV時，總耐壓值的設計必須要大於或等於7.62kV。假設共10組轉換單元12-1~12-n，對應10組的耦合單元52-1~52-n，則每個耦合單元52-1~52-n的耐壓值就必須設計大於等於762V。由於耦合單元52-1~52-n的耐壓值越高，其電路成本也越高。因此當使用平均分配的方式進行耦合單元52-1~52-n的耐壓值的選用時，則不需要每一個耦合單元52-1~52-n都要設計大於等於總耐壓值。因此，可以達到大幅降低通訊模組50建置成本之功效。 Please refer to FIG. 4 for a schematic diagram of a circuit block diagram of the second embodiment of the communication module coupled to the conversion module of the present invention. The difference between this embodiment and the first embodiment in FIG. 3 is that the control unit 126 of the end conversion unit 12-n is coupled to the signal output terminal 524 of the start coupling unit 52-1. Specifically, when one point of the input terminal 122 of the end conversion unit 12-n is coupled to the neutral point N, the pressure difference of the live wire R to the neutral point N is as high as 7.62 kV. However, because the circuit configuration of the communication module 50 of the present invention uses the characteristics of the coupling units 52-1 to 52-n coupled in series, the total withstand voltage can be equally distributed as the conversion units 12-1 to 12-n. The total withstand voltage value corresponds to the voltage value of the AC power supply Vac, which means that if the pressure difference between the live wire R and the neutral point N is as high as 7.62kV, the total withstand voltage design must be greater than or equal to 7.62kV. Assuming a total of 10 groups of conversion units 12-1~12-n, corresponding to 10 groups of coupling units 52-1~52-n, the withstand voltage of each coupling unit 52-1~52-n must be designed to be greater than or equal to 762V . Since the higher the withstand voltage of the coupling units 52-1 to 52-n, the higher the circuit cost. Therefore, when using an even distribution method to determine the withstand voltage of the coupling unit 52-1~52-n When selecting, there is no need to design each coupling unit 52-1~52-n to be greater than or equal to the total withstand voltage. Therefore, the effect of greatly reducing the construction cost of the communication module 50 can be achieved.

綜上所述，本發明的實施例係具有以下的優點與功效：1、本發明之主要功效在於，利用通訊模組中的耦合單元串聯耦接的特殊接線方式，使得控制模組與電力系統之間的通訊可以大量減少光纖線路的使用，以達到降低通訊模組配置於機櫃中的複雜度及降低配置成本之功效；2、利用通訊模組中的耦合單元將處於安全電壓工作環境的控制模組與處於高電壓工作環境的電力系統進行電氣隔離，以避免人員有接觸到高壓電的風險；3、由於通訊模組中的耦合單元可以平均分配的方式進行耐壓值的選用，因此當使用平均分配的方式進行耦合單元的耐壓值的選用時，可以達到大幅降低通訊模組建置成本之功效；及4、由於轉換模組使用固態變壓器，使得轉換單元特別適合做高壓與低壓之間的雙向轉換，因此克服了傳統變壓器只適用於單一頻率、單向電壓傳遞，而無法使用切換式轉換器雙向地轉換電壓的缺點。 In summary, the embodiments of the present invention have the following advantages and effects: 1. The main effect of the present invention is to use the special wiring method of the coupling unit in the communication module to be coupled in series to make the control module and the power system The communication between them can greatly reduce the use of optical fiber lines, so as to reduce the complexity of the communication module in the cabinet and reduce the configuration cost; 2. The coupling unit in the communication module will be controlled in a safe voltage working environment The module is electrically isolated from the power system in a high-voltage working environment to avoid the risk of personnel being exposed to high-voltage electricity; 3. Since the coupling unit in the communication module can be evenly distributed for selection of withstand voltage values, so When an even distribution method is used to select the withstand voltage value of the coupling unit, the effect of greatly reducing the construction cost of the communication module can be achieved; and 4. Since the conversion module uses a solid-state transformer, the conversion unit is particularly suitable for high voltage and low voltage Therefore, the traditional transformer is only suitable for single frequency and unidirectional voltage transmission, and the shortcomings that the switching converter cannot be used to convert the voltage in both directions are overcome.

惟，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，皆應包括於本發明之範疇中，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。此外，在申請專利範圍和說明書中提到的特徵可以分別單獨地或按照任何組合方式來實施。 However, 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 thereto, and are not intended to limit the present invention. The full scope of the present invention should be referred to the following application The scope of the patent shall prevail. All embodiments that conform to the spirit of the scope of the patent application of the present invention and similar variations 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 it. Changes or modifications can be covered in the following patent scope of this case. In addition, the features mentioned in the scope of the patent application and the specification can be implemented individually or in any combination.

10:轉換模組 10: Conversion module

12-1~12-n:轉換單元 12-1~12-n: Conversion unit

126:控制單元 126: Control Unit

40:控制模組 40: control module

50:通訊模組 50: Communication module

52-1~52-n:耦合單元 52-1~52-n: coupling unit

522:訊號輸入端 522: signal input

524:訊號輸出端 524: signal output terminal

Sc、Sc1~Scn:控制訊號 Sc, Sc1~Scn: control signal

Claims

一種應用於固態變壓器架構且具有通訊功能之電力系統，包括：一轉換模組，包括複數個轉換單元，每個轉換單元包括一輸入端、一輸出端及一控制單元，且每個轉換單元的該輸入端串聯耦接一交流電源；一匯流排路徑，耦接每個轉換單元的該輸出端；及一通訊模組，包括：複數個耦合單元，每個耦合單元分別包括一訊號輸入端與一訊號輸出端，該些耦合單元以一個耦合單元的該訊號輸出端耦接另一個耦合單元的該訊號輸入端的方式串聯耦接，且每個耦合單元的該訊號輸出端對應地耦接每個轉換單元的該控制單元；及一控制模組，耦接該些串聯耦接的耦合單元中，串接頭端的一起始耦合單元的該訊號輸入端。 A power system with a communication function applied to a solid-state transformer structure, including: a conversion module, including a plurality of conversion units, each conversion unit includes an input end, an output end and a control unit, and each conversion unit The input terminal is coupled to an AC power supply in series; a bus path is coupled to the output terminal of each conversion unit; and a communication module including: a plurality of coupling units, each of which includes a signal input terminal and A signal output terminal, the coupling units are coupled in series in such a manner that the signal output terminal of one coupling unit is coupled to the signal input terminal of another coupling unit, and the signal output terminal of each coupling unit is correspondingly coupled to each The control unit of the conversion unit; and a control module, coupled to the signal input end of an initial coupling unit at the serial end of the coupling units coupled in series.

如申請專利範圍第1項所述之電力系統，其中該交流電源的其中一端為一中性點，該些轉換單元中，串接尾端的一結尾轉換單元耦接該中性點。 In the power system described in item 1 of the scope of patent application, one end of the AC power source is a neutral point, and among the conversion units, an end conversion unit connected in series to the end is coupled to the neutral point.

如申請專利範圍第2項所述之電力系統，其中該些轉換單元中，串接頭端的一起始轉換單元的該控制單元耦接該起始耦合單元的該訊號輸出端，或者該結尾轉換單元的該控制單元耦接該起始耦合單元的該訊號輸出端。 For the power system described in item 2 of the scope of patent application, in the conversion units, the control unit of a start conversion unit at the serial connection end is coupled to the signal output end of the start coupling unit, or the end conversion unit The control unit is coupled to the signal output terminal of the initial coupling unit.

如申請專利範圍第1項所述之電力系統，其中該些耦合單元平均分配對應該交流電源電壓值的一總耐壓值。 For example, in the power system described in item 1 of the scope of patent application, the coupling units equally distribute a total withstand voltage corresponding to the voltage value of the AC power supply.

如申請專利範圍第1項所述之電力系統，其中該些耦合單元為一光耦合器，該光耦合器將處於一安全電壓工作環境的該控制模組與處於一高電壓工作環境的該控制單元電氣隔離。 For the power system described in item 1 of the scope of patent application, the coupling units are an optocoupler, and the optocoupler combines the control module in a safe voltage working environment and the control in a high voltage working environment The unit is electrically isolated.

如申請專利範圍第1項所述之電力系統，其中該控制模組在一單位時間傳送複數個封包至該起始耦合單元，且該些封包的數量等於該些轉換單元的數量，使每個轉換單元的該控制單元對應的接收該些封包的其中之一封包。 For the power system described in item 1 of the scope of patent application, wherein the control module transmits a plurality of packets to the initial coupling unit in a unit time, and the number of the packets is equal to the number of the conversion units, so that each The control unit of the conversion unit correspondingly receives one of the packets.

如申請專利範圍第1項所述之電力系統，其中每個轉換單元中的該控制單元分別控制每個轉換單元將該交流電源轉換為一總線電源，且提供該總線電源至該匯流排路徑。 For the power system described in item 1 of the scope of patent application, the control unit in each conversion unit controls each conversion unit to convert the AC power to a bus power, and provides the bus power to the bus path.

一種應用於固態變壓器架構之通訊模組，耦接一轉換模組中的複數個轉換單元與一控制模組，且每個轉換單元包括一控制單元，該通訊模組包括：複數個耦合單元，每個耦合單元分別包括一訊號輸入端與一訊號輸出端，該些耦合單元以一個耦合單元的該訊號輸出端耦接另一個耦合單元的該訊號輸入端的方式串聯耦接，且每個耦合單元的該訊號輸出端對應地耦接每個轉換單元的該控制單元；其中，該些串聯耦接的耦合單元中，串接頭端的一起始耦合單元的該訊號輸入端耦接該控制模組。 A communication module applied to a solid-state transformer structure is coupled to a plurality of conversion units in a conversion module and a control module, and each conversion unit includes a control unit. The communication module includes: a plurality of coupling units, Each coupling unit respectively includes a signal input terminal and a signal output terminal. The coupling units are coupled in series in such a manner that the signal output terminal of one coupling unit is coupled to the signal input terminal of another coupling unit, and each coupling unit The signal output terminal of is correspondingly coupled to the control unit of each conversion unit; wherein, among the coupling units coupled in series, the signal input terminal of an initial coupling unit at the serial terminal is coupled to the control module.

如申請專利範圍第8項所述之通訊模組，其中每個轉換單元的輸入端串聯，且耦接一交流電源，該交流電源的其中一端為一中性點，且該些轉換單元中，串接尾端的一結尾轉換單元耦接該中性點。 For the communication module described in item 8 of the scope of patent application, the input terminals of each conversion unit are connected in series and coupled to an AC power source, one end of the AC power source is a neutral point, and among the conversion units, An end conversion unit connected to the end of the series is coupled to the neutral point.

如申請專利範圍第9項所述之通訊模組，其中該些轉換單元中，串接頭端的一起始轉換單元的該控制單元耦接該起始耦合單元的該訊號輸出端，或者該結尾轉換單元的該控制單元耦接該起始耦合單元的該訊號輸出端。 For the communication module described in item 9 of the scope of patent application, among the conversion units, the control unit of an initial conversion unit at the serial terminal is coupled to the signal output end of the initial coupling unit, or the end conversion unit The control unit of is coupled to the signal output terminal of the initial coupling unit.

如申請專利範圍第9項所述之通訊模組，其中該些耦合單元平均分配對應該交流電源電壓值的一總耐壓值。 For example, in the communication module described in item 9 of the scope of the patent application, the coupling units equally distribute a total withstand voltage value corresponding to the AC power supply voltage value.

如申請專利範圍第8項所述之通訊模組，其中該些耦合單元為一光耦合器，該光耦合器將處於一安全電壓工作環境的該控制模組與處於一高電壓工作環境的該控制單元電氣隔離。 For the communication module described in item 8 of the scope of patent application, the coupling units are an optocoupler, and the optocoupler connects the control module in a safe voltage working environment and the control module in a high voltage working environment The control unit is electrically isolated.