TW202320451A - Uninterruptible power device with path forced turn-off function and method of path forced turn-off the same - Google Patents
Uninterruptible power device with path forced turn-off function and method of path forced turn-off the same Download PDFInfo
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本發明係有關一種不斷電裝置及其控制方法,尤指一種具有路徑強迫關斷功能之不斷電裝置及其路徑強迫關斷方法。The invention relates to an uninterruptible power device and its control method, in particular to an uninterruptible device with path forced shutdown function and its path forced shutdown method.
由於目前的電子系統領域中,關鍵性電子系統(例如伺服器、中央控制系統等)的日益普及,因此電力供應的持續性及穩定性越來越獲得重視。現今的解決方案大多會加裝不斷電裝置來滿足關鍵性電子系統的需求。以圖1習知的不斷電裝置100為例,不斷電裝置100包括旁路路徑1與電源轉換模組22,且電源轉換模組22並聯旁路路徑1。旁路路徑1包括開關單元12,且開關單元12包括反向並聯的第一閘流體122與第二閘流體124。電網200提供第一電壓V1通過電網端100-1、開關單元12至負載端100-2,以對負載300供電。在電網200故障時,不斷電裝置100控制開關單元12關斷,且控制電源轉換模組22提供第二電壓V2對負載300備援供電。Due to the increasing popularity of key electronic systems (such as servers, central control systems, etc.) in the current electronic system field, more and more attention has been paid to the continuity and stability of power supply. Most of today's solutions will add uninterruptible power supply units to meet the needs of critical electronic systems. Taking the conventional
然而,閘流體的特性會導致開關單元12無法順利關斷,且電網故障通常會伴隨相位偏移,可能造成旁路路徑1延後了好幾個交流週期才關斷的現象,導致整個不斷電裝置100存在穩定度不足的風險。具體而言,閘流體的特性為,當閘流體尚有電流流過時,閘流體無法透過關斷訊號快速的關斷。因此在電網200故障時,第一閘流體122或第二閘流體124可能還有電流流過,因此無法立即的關斷,需要等到閘流體未有電流流過時,方可順利地關斷閘流體。However, the characteristics of the thyristor will cause the
所以,如何設計出一種具有路徑強迫關斷功能之不斷電裝置及其路徑強迫關斷方法,以確保在發生異常的週期當下,控制旁路路徑關斷成功,乃為本案創作人所欲行研究的一大課題。Therefore, how to design an uninterruptible power supply device with the function of forced shutdown of the path and the method of forced shutdown of the path to ensure that the control bypass path is successfully shut down at the moment of the abnormal cycle is what the author of this case wants to do. A major topic of research.
為了解決上述問題,本發明係提供一種具有路徑強迫關斷功能之不斷電裝置,以克服習知技術的問題。因此,本發明不斷電裝置配置為耦接電網與負載之間,且不斷電裝置包括旁路路徑、至少一電源轉換模組、電流偵測單元及控制模組。旁路路徑通過電網端耦接電網,且通過負載端耦接負載。旁路路徑包括至少一開關單元,且至少一開關單元包括第一閘流體與第二閘流體,第一閘流體與第二閘流體反向並聯;旁路路徑用以通過電網端接收第一電壓,且傳輸第一電壓至負載端。至少一電源轉換模組包括輸入端與輸出端;輸入端耦接電網端,且輸出端耦接負載端。電流偵測單元耦接旁路路徑,且用以偵測旁路路徑的電流而相應地傳送電流訊號。控制模組耦接電流偵測單元與至少一電源轉換模組。控制模組於第一電壓異常時,提供關斷訊號至第一閘流體與第二閘流體,且傳輸電流訊號的極性至至少一電源轉換模組。電源轉換模組根據電流訊號的極性產生補償量,並根據補償量與輸出端或輸入端的電壓來產生輸出電壓命令。In order to solve the above-mentioned problems, the present invention provides an uninterruptible power supply device with a forced shutdown function to overcome the problems of the prior art. Therefore, the uninterruptible device of the present invention is configured to be coupled between the grid and the load, and the uninterruptible device includes a bypass path, at least one power conversion module, a current detection unit and a control module. The bypass path is coupled to the grid through the grid end and coupled to the load through the load end. The bypass path includes at least one switch unit, and the at least one switch unit includes a first thyristor body and a second thyristor body, and the first thyristor body and the second thyristor body are connected in antiparallel; the bypass path is used to receive the first voltage through the grid terminal , and transmit the first voltage to the load terminal. At least one power conversion module includes an input terminal and an output terminal; the input terminal is coupled to the grid terminal, and the output terminal is coupled to the load terminal. The current detection unit is coupled to the bypass path, and is used for detecting the current of the bypass path and correspondingly transmitting a current signal. The control module is coupled to the current detection unit and at least one power conversion module. When the first voltage is abnormal, the control module provides shutdown signals to the first thyristor and the second thyristor, and transmits the polarity of the current signal to at least one power conversion module. The power conversion module generates a compensation amount according to the polarity of the current signal, and generates an output voltage command according to the compensation amount and the voltage at the output terminal or the input terminal.
為了解決上述問題,本發明係提供一種不斷電裝置之路徑強迫關斷方法,以克服習知技術的問題。不斷電裝置包括旁路路徑與至少一電源轉換模組,且旁路路徑耦接電網與負載;旁路路徑包括至少一開關單元,且至少開關單元包括反向並聯的第一閘流體與第二閘流體。旁路路徑通過電網端接收第一電壓,且傳輸第一電壓至負載端。因此,本發明路徑強迫關斷方法包括下列步驟:(a)得知第一電壓異常。(b)根據第一電壓異常而提供關斷訊號至第一閘流體與第二閘流體,且傳送旁路路徑的電流的極性至至少一電源轉換模組。(c)控制至少一電源轉換模組提供第二電壓至負載端,且第二電壓為至少一電源轉換模組的輸入端或輸出端的電壓與額外注入的補償電壓的總和。以及,(d)控制至少一電源轉換模組提供第二電壓至負載端,且第二電壓為相應於正常時的第一電壓。In order to solve the above-mentioned problems, the present invention provides a method for forcibly shutting down the path of an uninterruptible device to overcome the problems of the prior art. The uninterruptible power supply includes a bypass path and at least one power conversion module, and the bypass path is coupled to the grid and the load; the bypass path includes at least one switch unit, and at least the switch unit includes a first thyristor and a second thyristor connected in antiparallel Two thyristors. The bypass path receives the first voltage through the grid end, and transmits the first voltage to the load end. Therefore, the path forced shutdown method of the present invention includes the following steps: (a) Knowing that the first voltage is abnormal. (b) providing a shutdown signal to the first thyristor and the second thyristor according to the abnormality of the first voltage, and transmitting the polarity of the current in the bypass path to at least one power conversion module. (c) controlling at least one power conversion module to provide a second voltage to the load terminal, and the second voltage is the sum of the voltage of the input terminal or the output terminal of the at least one power conversion module and the additionally injected compensation voltage. And, (d) controlling at least one power conversion module to provide a second voltage to the load terminal, and the second voltage is corresponding to the first voltage in normal state.
本發明之主要目的及功效在於,本發明之不斷電裝置在電網提供的電網電壓異常時,利用控制模組控制電源轉換模組對尚未關斷的閘流體提供反向偏壓,即可利用反向偏壓使未關斷的閘流體逆偏截止,以確保在發生異常的週期當下,控制旁路路徑關斷成功之功效。The main purpose and effect of the present invention is that when the power grid voltage provided by the power grid is abnormal, the uninterruptible power supply device of the present invention can use the control module to control the power conversion module to provide a reverse bias The reverse bias cuts off the thyristor that is not turned off, so as to ensure the success of turning off the bypass path in the abnormal cycle.
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 that the present invention adopts to achieve the predetermined purpose, please refer to the following detailed description and accompanying drawings of the present invention. It is believed that the purpose, characteristics and characteristics of the present invention can be obtained from this in depth and For specific understanding, however, the accompanying drawings are provided for reference and illustration only, and are not intended to limit 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:Hereby, the technical content and detailed description of the present invention are described as follows in conjunction with the drawings:
請參閱圖2為本發明具有路徑強迫關斷功能之不斷電裝置之電路方塊圖,復配合參閱圖1。不斷電裝置100被配置為耦接電網200與負載300之間,且包括電網端100-1與負載端100-2。電網端100-1耦接電網200,且接收由電網200所提供的第一電壓V1。負載端100-2耦接負載300,且提供電力對負載300供電,以維持負載300穩定且正常的運作。不斷電裝置100還包括旁路路徑1、至少一電源轉換模組22、電流偵測單元3及控制模組4,且旁路路徑1的一端通過電網端100-1耦接電網200,另一端通過負載端100-2耦接負載300。旁路路徑1包括至少一開關單元12,且開關單元12串接於旁路路徑1上。開關單元12包括第一閘流體122與第二閘流體124,且第一閘流體122與第二閘流體124反向並聯。旁路路徑1用以通過電網端100-1接收第一電壓V1,且將第一電壓V1通過開關單元12傳輸至負載端100-2,以對負載端100-2供電。Please refer to FIG. 2 which is a circuit block diagram of an uninterruptible power supply device with path forced shutdown function according to the present invention, and refer to FIG. 1 for complex cooperation. The UPS 100 is configured to be coupled between the
本實施例係以一個電源轉換模組22示意,電源轉換模組22包括輸入端22A與輸出端22B。輸入端22A耦接電網端100-1而接收第一電壓V1,且輸出端22B耦接負載端100-2。電源轉換模組22用以將第一電壓V1轉換為第二電壓V2,以提供第二電壓V2對負載300供電。其中,電源轉換模組22可通過若干的偵測單元(圖未示)偵測輸入端22A與輸出端22B,以得知輸入與輸出的電壓、電流,且進行相應的回授控制。電流偵測單元3耦接負載端100-2與開關單元12之間,且用以偵測流過旁路路徑1的電流I而提供電流訊號Si。控制模組4耦接電流偵測單元3與電源轉換模組22,且通過接收電流訊號Si得知電流I的大小及電流方向。具體而言,控制模組4可通過偵測電網端100-1來判斷第一電壓V1是否異常,或者通過接收例如但不限於,系統控制器等外部裝置(圖未示)所提供的偵測訊號來判斷或得知第一電壓V1是否異常。This embodiment is illustrated by a
當第一電壓V1正常時,不斷電裝置100可操作於高效率的模式,控制模組4提供導通訊號Son控制開關單元12導通(即控制第一閘流體122與第二閘流體124導通),以使第一電壓V1通過旁路路徑1提供至負載300。此時,電源轉換模組22可以待機而不運作,或者,電源轉換模組22也可以對負載300進行諧波補償。When the first voltage V1 is normal, the
當第一電壓V1異常時,控制模組4對不斷電裝置100進行路徑強迫關斷的操作,待路徑強迫關斷後再對負載300供電。進一步而言,由於閘流體的特性為,當閘流體尚有電流流過時,閘流體無法快速的關斷。因此當第一電壓V1異常時,即便控制模組4通過提供關斷訊號Soff控制第一閘流體122與第二閘流體124關斷,但通常其中之一的閘流體尚有電流流過而無法快速的關斷,造成旁路路徑1關斷過慢的缺點。為此,必須要對尚未關斷的閘流體提供反向偏壓,方能迅速關斷閘流體。因此,本發明之主要目的及功效在於,在第一電壓V1異常時,利用控制模組4控制電源轉換模組22對尚未關斷的閘流體提供反向偏壓,以迅速關斷閘流體。When the first voltage V1 is abnormal, the
具體而言,在第一電壓V1異常時,控制模組4提供關斷訊號Soff至第一閘流體122與第二閘流體124,以確保不會再觸發閘流體導通。然後,控制模組4傳輸電流訊號Si的極性Sp至電源轉換模組22。電源轉換模組22收到電流訊號Si的極性Sp後,電源轉換模組22根據極性Sp產生補償量,且根據補償量與輸入端22A或輸出端22B的電壓(即電源轉換模組22偵測輸入端22A或輸出端22B當下的電壓)來產生輸出電壓命令。如此,即可利用對應輸出電壓命令所產生的第二電壓V2來使未關斷的閘流體逆偏截止,以確保在發生異常的週期當下(即可以在異常發生下的交流電壓週期),控制旁路路徑關斷成功之功效。此外,由於整個不斷電裝置100並未為了迅速關斷開關單元12而額外設置電路元件或控制電路,僅需要使用控制模組4與電源轉換模組22的偵測及控制即可,因此可以達成節省電路體積,且無須額外增加電路成本之功效。值得一提,本發明結合閉迴路控制與開迴路控制的優點,以下進一步說明,如果使用閉迴路方式,偵測並控制閘流體的電流降為零,將需要高頻寬的電流感測器,其成本較高且通常動態較緩慢或有不穩定的風險;另一方面,若根據流經閘流體的電流的極性與參考正弦波來產生電壓,有時不能關斷閘流體電流,主要是因為當電網電壓不正常時,通常伴隨相位偏移或具有諧波,特別是當電網電壓伴隨諧波時將導致關斷失敗。本發明根據流經閘流體的電流的極性與電源轉換模組輸入端或輸出端當下的電壓來控制,因僅需要獲得電流方向性,不需要高頻寬的電流感測器,且因為採用的是實際電壓的資訊,當電網電壓具備諧波時,依然可以確保關斷閘流體。Specifically, when the first voltage V1 is abnormal, the
經過前述強迫關斷的階段,在第一閘流體122與第二閘流體124皆關斷以後,電源轉換模組22操作在不斷電供電模式,即電源轉換模組22所提供的第二電壓V2為相應於正常時的第一電壓V1,以對負載300備援供電。值得一提,於本發明之一實施例中,第一電壓V1正常可代表交流電壓的電壓振幅、相位及頻率在符合規範的預定範圍,其可能可以稍微容忍一些諧波失真或振幅不穩定的現象,但仍然可滿足負載300運作所需的標準。另外一方面,第一電壓V1異常則可代表交流電壓的電壓振幅、相位及頻率不符合規範,其可能發生的原因為電網200不夠穩定、元件接觸不良、諧波失真過大,或是電網200斷電而造成的。After the aforementioned forced shutdown stage, after both the
請參閱圖3A為本發明具有路徑強迫關斷功能之單相不斷電裝置之電路方塊圖,復配合參閱圖2。由於不斷電裝置100係套用於單相的電力系統,因此旁路路徑1為單相電路路徑。開關單元12的數量對應電力系統的相數而為一組,且串接於單相電路路徑上。電源轉換模組22以一個為例,電源轉換模組22包括交流直流轉換單元222、直流交流轉換單元224、儲能單元226及控制單元230。交流直流轉換單元222耦接電網端100-1,且用以將第一電壓V1轉換為直流電壓Vdc。直流交流轉換單元224耦接交流直流轉換單元222與負載端100-2,且用以將直流電壓Vdc轉換為第二電壓V2。儲能單元226(例如但不限於,可以為電池)耦接交流直流轉換單元222與直流交流轉換單元224之間,且用以儲存直流電壓Vdc。其中,電源轉換模組22更可包括直流直流轉換單元228,且直流直流轉換單元228耦接交流直流轉換單元222、直流交流轉換單元224及儲能單元226之間。直流直流轉換單元228用以對儲能單元226所儲存的直流電壓Vdc進行直流之間的轉換,以使所轉換的直流電壓Vdc適用於直流交流轉換單元224進行第二電壓V2的轉換。Please refer to FIG. 3A, which is a circuit block diagram of a single-phase uninterruptible power supply device with path forced shutdown function according to the present invention, and refer to FIG. 2 for the combination. Since the
控制單元230耦接控制模組4與直流交流轉換單元224,且除了接收電流訊號Si的極性Sp外,還接收輸入端22A或輸出端22B的電壓、電流所對應的偵測訊號,以相應的控制直流交流轉換單元224。具體地,控制單元230係接收輸入端22A或輸出端22B所對應的電壓訊號Sv,且根據極性Sp產生一補償量,以根據補償量與電壓訊號Sv產生輸出電壓命令,並根據輸出電壓命令提供脈寬調變訊號PWM控制直流交流轉換單元224。因為第一閘流體122與第二閘流體124其中之一可能正處於導通狀態,所以藉由偵測輸入端22A或輸出端22B的電壓訊號Sv可以得到旁路路徑1上的實際電壓,藉此控制直流交流轉換單元224的輸出電壓以關斷第一閘流體122或第二閘流體124。其中,控制單元230可為單獨控制直流交流轉換單元224的控制器,或者還可額外包括控制交流直流轉換單元222與直流直流轉換單元228的控制器,但為了聚焦於描述本案主要特點,因此在圖中僅出示控制單元230提供脈寬調變訊號PWM控制直流交流轉換單元224示意,此外,電源轉換模組22的所有單元並不限定整合在同一容置空間內。The
當第一電壓V1正常時,控制模組4提供導通訊號Son控制開關單元12導通,且第一電壓V1通過開關單元12提供至負載300。控制單元230可控制交流直流轉換單元222與直流直流轉換單元228將第一電壓V1轉換為直流電壓Vdc,以對儲能單元226充電。當電第一壓V1正常時,控制單元230可控制直流交流轉換單元224待機,以節省電源轉換模組22的電力消耗。或者,控制單元230可控制直流交流轉換單元224對負載300進行諧波補償。When the first voltage V1 is normal, the
當第一電壓V1異常時,開始進入閘流體強迫關斷階段,控制模組4提供關斷訊號Soff至第一閘流體122與第二閘流體124以確保閘流體不會再觸發,且根據電流偵測單元3所提供的電流訊號Si相應地傳輸極性Sp至控制單元230。控制單元230根據極性Sp產生補償量,且根據補償量與電壓訊號Sv產生輸出電壓命令,以通過輸出電壓命令提供脈寬調變訊號PWM控制直流交流轉換單元224,直流交流轉換單元224根據脈寬調變訊號PWM將直流電壓Vdc轉換為第二電壓V2(此階段第二電壓V2為響應該輸出電壓命令的電壓),以對尚未關斷的閘流體提供反向偏壓而迅速關斷閘流體。在閘流體強迫關斷階段,直流交流轉換單元224的輸出電壓(即第二電壓V2)基本上是響應該輸出電壓命令,除非電壓命令超過脈寬調變的上限時會產生一點差異。最後,在第一閘流體122與第二閘流體124皆關斷時,控制單元230操作在不斷電供電模式,以控制直流交流轉換單元224的輸出電壓(即第二電壓V2)為交流弦波以對負載300提供穩定的供電。When the first voltage V1 is abnormal, it starts to enter the thyristor forced shutdown stage, and the
請參閱圖3B為本發明具有路徑強迫關斷功能之三相不斷電裝置之電路方塊圖,復配合參閱圖2~3A。由於不斷電裝置100’係套用於三相的電力系統,因此旁路路徑1’為三相電路路徑。開關單元12的數量對應電力系統的相數而為三組,且各別串接於三相電路路徑的其中一相上。因三相不斷電裝置的功率通常較大,所以可以並聯多個電源轉換模組22-1~22-n,然不以此為限。每個電源轉換模組22-1~22-n與圖3A的電源轉換模組22差異在於,電源轉換模組22-1~22-n的輸入端與輸出端為三相交流電源端,且每個電源轉換模組22-1~22-n可以分別包括如圖3A所示的電路(即交流直流轉換單元222、直流交流轉換單元224、儲能單元226及控制單元230等)。其中,為了詳述本圖所出示的重點,電源轉換模組22-1~22-n以單一方框表示。Please refer to FIG. 3B , which is a circuit block diagram of the three-phase uninterruptible power supply device with path forced shutdown function of the present invention. Refer to FIGS. 2-3A for the combination. Since the UPS 100' is used in a three-phase power system, the bypass path 1' is a three-phase circuit path. The number of
其中,圖3A單相系統與圖3B三相系統的差異在於,電網200的電壓(第一電壓V1)為三相交流電壓,因此每一相於相同時間下的電壓、相位及電流方向會不相同。在第一電壓V1異常而使控制模組4提供關斷訊號Soff關斷第一閘流體122與第二閘流體124時,由於每一相的電流方向的不盡相同,控制模組4係根據各相的電流方向發出極性Sp至每一個電源轉換模組22-1~22-n的控制單元230,因此可以針對每一相的各別狀況來相應地產生輸出電壓命令,提供可關斷剩餘的閘流體的第二電壓V2,以確保在第一電壓V1異常的週期當下,路徑關斷成功之功效。The difference between the single-phase system in FIG. 3A and the three-phase system in FIG. 3B is that the voltage (first voltage V1) of the
請參閱圖4為本發明具有路徑強迫關斷功能之控制模組之電路方塊圖,復配合參閱圖2~3B。控制模組4包括判斷單元422,且判斷單元422耦接電流偵測單元3。判斷單元422用以根據電流偵測單元3所提供的電流訊號Si判斷旁路路徑1的電流I的方向,以相應地提供電流訊號Si的極性Sp。控制單元230包括電壓補償單元442、加法器444及脈寬調變單元446,且電壓補償單元442耦接判斷單元422。在第一電壓V1異常時,補償單元442用以根據極性Sp相應地提供補償量Vc。控制單元230可以使用類比電路來實現,也可以使用微控制器(MCU)或數位訊號處理器(DSP)等方式來完成。Please refer to FIG. 4 which is a circuit block diagram of the control module with path forced shutdown function according to the present invention, and refer to FIGS. 2-3B for complex coordination. The
具體地,當判斷單元422根據電流訊號Si判斷電流方向為由該電網端100-1至負載端100-2時,判斷單元422傳輸正值(例如但不限於,傳輸”1”代表為正值)的極性Sp至電壓補償單元442。電壓補償單元442根據正值的極性Sp產生正值的補償量Vc。反之,則判斷單元422傳輸負值(例如但不限於,傳輸”-1”代表為負值)的極性Sp至電壓補償單元442。電壓補償單元442根據負值的極性Sp產生負值的補償量Vc。加法器444耦接電壓補償單元442,且用以根據補償量Vc與電壓訊號Sv(偵測電源轉換模組22輸入端22A或輸出端22B所獲得的訊號)提供輸出電壓命令Voc至脈寬調變單元446。脈寬調變單元446耦接加法器444,且根據輸出電壓命令Voc調製脈寬調變訊號PWM,以控制直流交流轉換單元224輸出的第二電壓V2。其中,第二電壓V2為補償量Vc所對應的補償電壓與電壓訊號Sv所對應的電壓(即電源轉換模組22輸入端22A或輸出端22B當前的電壓)加總而得的值如此,第二電壓V2必定會使得未被關斷的閘流體逆偏,以通過提供反向偏壓(即第二電壓V2)來強迫關斷開關單元12。進一步說明,圖4的電路方塊圖代表每一相的控制方塊圖,以圖3A單相系統為例,電壓訊號Sv所對應的電壓可以是L相的電壓,極性Sp則為L相電流的極性;若以圖3B三相系統為例,則電壓訊號Sv分別為各相(例如U、V、W相或R、S、T相) 的電壓,極性Sp分別為各相的電流極性,藉此可分別產生各相的輸出電壓命令,以控制直流交流轉換單元224輸出的第二電壓V2可以關斷各相的開關單元12。Specifically, when the judging
請參閱圖5為本發明不斷電裝置之路徑強迫關斷方法流程圖,復配合參閱圖2~4。路徑強迫關斷的方法包括,得知第一電壓異常(S100)。較佳的實施方式為,利用控制模組4通過偵測電網端100-1判斷第一電壓V1是否異常。或者,利用控制模組4通過接收例如但不限於,系統控制器等外部裝置(圖未示)所提供的偵測訊號來判斷或得知第一電壓V1是否異常。然後,根據第一電壓異常而提供關斷訊號至第一閘流體與第二閘流體,且傳送旁路路徑的電流的極性至至少一電源轉換模組(S120)。較佳的實施方式為,在關斷訊號Soff提供後,利用電流偵測單元3偵測旁路路徑1的電流I而提供電流訊號Si,且利用控制模組4根據電流訊號Si判斷電流I的電流方向,以根據電流方向傳輸極性Sp至電源轉換模組22。Please refer to FIG. 5 , which is a flow chart of the path forced shutdown method of the uninterruptible device of the present invention, and refer to FIGS. 2-4 for complex cooperation. The method for forcibly turning off the path includes learning that the first voltage is abnormal (S100). A preferred embodiment is to use the
然後,控制電源轉換模組提供第二電壓至負載端,且第二電壓為電源轉換模組的輸入端或輸出端的電壓與額外注入的補償電壓的總和(S140)。電源轉換模組22包括交流直流轉換單元222、直流交流轉換單元224、儲能單元226及控制單元230,且在第一電壓V1正常時,交流直流轉換單元222被控制轉換第一電壓V1為直流電壓Vdc。直流電壓Vdc可直接儲存於電池,或通過直流直流轉換單元228轉換為合適儲存的電壓並儲存於電池。Then, the power conversion module is controlled to provide a second voltage to the load terminal, and the second voltage is the sum of the voltage at the input terminal or the output terminal of the power conversion module and the additionally injected compensation voltage ( S140 ). The
步驟(S140)較佳的實施方式為,利用控制單元230接收極性Sp,且根據極性Sp產生補償量Vc。控制單元230還接收電壓訊號Sv,電壓訊號Sv係通過額外的偵測單元偵測電源轉換模組22的輸入端22A或輸出端22B的電壓而獲得。控制單元230根據補償量Vc與電壓訊號Sv來產生輸出電壓命令Voc,且根據輸出電壓命令Voc調製脈寬調變訊號PWM。脈寬調變訊號PWM提供至直流交流轉換單元224,以控制直流交流轉換單元224將直流電壓Vdc轉換為第二電壓V2。其中,補償量Vc即相應於額外注入的補償電壓。如此,即可利用總和電壓使未關斷的閘流體逆偏截止,以達成可迅速(即可以在異常發生下的交流電壓週期)關斷開關單元12,以確保在發生異常的週期當下,路徑關斷成功之功效。A preferred implementation manner of the step ( S140 ) is that the
最後,控制電源轉換模組提供第二電壓至負載端,且第二電壓為相應於正常時的第一電壓(S160)。較佳的實施方式為,利用控制模組4偵測並判斷第一閘流體122與第二閘流體124皆關斷以後,控制模組4可以提供訊號告知電源轉換模組22的控制單元230。控制單元230操作在不斷電供電模式,即控制單元230控制直流交流轉換單元224所提供的第二電壓V2為相應於正常時的第一電壓V1(即可以為交流電壓),以對負載300備援供電。。值得一提,於本發明之一實施例中,上述步驟(S100)~(S160)的細部實施方式,可以參照上述本發明圖2~4之細部描述,在此不再加以贅述。此外,於本發明之一實施例中,圖5所述之步驟步限定僅能使用如本案圖2~4所示之元件實施,舉凡可達成圖5步驟之電路元件、控制軟體等,皆應包含在本實施例之範疇當中。Finally, the control power conversion module provides a second voltage to the load terminal, and the second voltage is corresponding to the first voltage in normal state ( S160 ). In a preferred embodiment, after the
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。However, the above description is only a detailed description and drawings of preferred embodiments of the present invention, but the features of the present invention are not limited thereto, and are not intended to limit the present invention. The entire scope of the present invention should be applied for as follows The scope of the patent shall prevail, and all embodiments that conform to the spirit of the patent scope of the present invention and its similar changes shall be included in the scope of the present invention, and any person familiar with the art can easily think of it in the field of the present invention Changes or modifications can be covered by the scope of the following patents in this case.
100、100’:不斷電裝置
100-1:電網端
100-2:負載端
1、1’:旁路路徑
12:開關單元
122:第一閘流體
124:第二閘流體
22、22-1~22-n:電源轉換模組
22A:輸入端
22B:輸出端
222:交流直流轉換單元
224:直流交流轉換單元
226:儲能單元
228:直流直流轉換單元
230:控制單元
3:電流偵測單元
4:控制模組
422:判斷單元
442:電壓補償單元
444:加法器
446:脈寬調變單元
200:電網
300:負載
V1:第一電壓
V2:第二電壓
Vdc:直流電壓
Vc:補償量
I:電流
Son:導通訊號
Soff:關斷訊號
Si:電流訊號
Sp:極性
Sv:電壓訊號
Voc:輸出電壓命令
PWM:脈寬調變訊號
(S100)~(S180):步驟
100, 100': UPS
100-1: grid end
100-2: load
圖1為習知的不斷電裝置之電路方塊圖;Fig. 1 is the circuit block diagram of conventional uninterruptible power supply device;
圖2為本發明具有路徑強迫關斷功能之不斷電裝置之電路方塊圖;Fig. 2 is the circuit block diagram of the uninterruptible power supply device with path forced shutdown function of the present invention;
圖3A為本發明具有路徑強迫關斷功能之單相不斷電裝置之電路方塊圖;Fig. 3A is the circuit block diagram of the single-phase uninterruptible power supply device with path forced shutdown function of the present invention;
圖3B為本發明具有路徑強迫關斷功能之三相不斷電裝置之電路方塊圖;Fig. 3B is the circuit block diagram of the three-phase uninterruptible power supply device with path forced shutdown function of the present invention;
圖4為本發明具有路徑強迫關斷功能之控制模組之電路方塊圖;及Fig. 4 is the circuit block diagram of the control module with path forced shutdown function of the present invention; and
圖5為本發明不斷電裝置之路徑強迫關斷方法流程圖。FIG. 5 is a flow chart of the path forced shutdown method of the uninterruptible device of the present invention.
100:不斷電裝置 100: UPS
100-1:電網端 100-1: grid end
100-2:負載端 100-2: load end
1:旁路路徑 1: Bypass path
12:開關單元 12: switch unit
122:第一閘流體 122: The first thyramid
124:第二閘流體 124: The second thyramid
22:電源轉換模組 22: Power conversion module
22A:輸入端 22A: input terminal
22B:輸出端 22B: output terminal
3:電流偵測單元 3: Current detection unit
4:控制模組 4: Control module
200:電網 200: grid
300:負載 300: load
V1:第一電壓 V1: first voltage
V2:第二電壓 V2: second voltage
I:電流 I: Current
Si:電流訊號 Si: current signal
Son:導通訊號 Son: conduction signal
Soff:關斷訊號 Soff: shutdown signal
Sp:極性 Sp: Polarity
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TW110140878A TWI795978B (en) | 2021-11-03 | 2021-11-03 | Uninterruptible power device with path forced turn-off function and method of path forced turn-off the same |
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DE60224477T2 (en) * | 2001-06-26 | 2009-02-26 | Sanyo Denki Co., Ltd. | Uninterruptible power supply and method for turning off an AC switch for an uninterruptible power supply |
KR20050009994A (en) * | 2002-05-02 | 2005-01-26 | 에스피 시스템즈 피티이 리미티드 | Dynamic series voltage compensator with current sharing static switch |
US9362781B2 (en) * | 2012-09-14 | 2016-06-07 | Chloride Srl | Uninterruptible power supply system with fast transfer for undervoltage source line failures |
KR20180134993A (en) * | 2016-04-21 | 2018-12-19 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | Uninterruptible power supply |
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