TWM519355U - Grid-connected power supply system - Google Patents
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Description
本創作有關於一種併網供電系統,特別是多種電力供電給負載之併網供電系統。 This creation is about a grid-connected power supply system, especially a grid-connected power supply system that supplies a variety of power to the load.
隨著各國政府逐漸推動太陽能發電產業,太陽能發電之逆變器已被廣泛地應用於大型發電站或家庭用的太陽能供電系統中。其中,併網供電系統包括具有儲能的電池模組。因此,併網供電系統實現了將白天太陽能的能量逆變,以供電給家庭用的負載。另一方面,又將多餘電力之能量儲存到電池模組中。當於夜晚時,電池模組亦可將儲存能量透過併網供電系統以供電給家庭用的負載。 As governments have gradually promoted the solar power industry, solar power inverters have been widely used in large-scale power stations or solar power systems for home use. The grid-connected power supply system includes a battery module with energy storage. Therefore, the grid-connected power supply system realizes the inversion of the solar energy during the day to supply power to the household. On the other hand, the energy of excess power is stored in the battery module. At night, the battery module can also store stored energy through the grid-connected power supply system to supply power to the household load.
然而,習知的併網供電系統往往會將太陽能電力之能量優先供應給負載,而多餘的能量將會回饋到市電之電網上,而無法將多餘電力儲存於電池模組中;或是習知的併網供電系統往往透過二次或多次的逆變轉換,以將多餘電力儲存至電池模組中,藉此造成電能轉換的耗損或浪費;或是習知的電池逆變器掛在市電之電網上,而使用市電以逆變轉換為對電池模組充電之電力,藉此造成電能浪費或降低電能的使用效率。如此一來,習知的併網供電系統往往造成人們使用上的不方便。 However, conventional grid-connected power supply systems tend to preferentially supply the energy of solar power to the load, and the excess energy will be fed back to the utility grid, and the excess power cannot be stored in the battery module; or conventionally known The grid-connected power supply system often uses two or more inverter conversions to store excess power into the battery module, thereby causing loss or waste of power conversion; or the conventional battery inverter is hung in the mains On the power grid, the utility power is used to convert the inverter into power for charging the battery module, thereby causing waste of power or reducing the use efficiency of the power. As a result, the conventional grid-connected power supply system often causes inconvenience in people's use.
本創作在於提供一種併網供電系統,透過直流轉換模組以將太陽能電力轉換為對電池模組充電之電力,或是將電池模組放電 之電力轉換給逆變模組運用,藉此提升併網供電系統的使用方便性。 The present invention provides a grid-connected power supply system for converting solar power into power for charging a battery module or discharging a battery module through a DC conversion module. The power is converted to the inverter module for use, thereby improving the usability of the grid-connected power supply system.
本創作實施例提供一種併網供電系統,適用於將一太陽能蓄電模組所輸出的一太陽能電力、一電池模組所輸出的一電池電力及一市電併網以供電給一負載。併網供電系統包括:一電表模組、一直流轉換模組及一逆變模組。電表模組電性連接市電及負載。直流轉換模組電性連接電池模組及太陽能蓄電模組。逆變模組電性連接太陽能蓄電模組、直流轉換模組、電表模組及負載。其中,直流轉換模組檢測出太陽能電力存在,並檢測出一多餘電力流經電表模組時,太陽能電力之一第一電力經由逆變模組逆變,以供電給負載,太陽能電力之一第二電力透過直流轉換模組轉換為一充電電力,以對電池模組充電。 The present invention provides a grid-connected power supply system, which is suitable for powering a solar power stored by a solar energy storage module, a battery power outputted by a battery module, and a utility power grid to supply power to a load. The grid-connected power supply system includes: an electric meter module, a continuous current conversion module and an inverter module. The meter module is electrically connected to the mains and the load. The DC conversion module is electrically connected to the battery module and the solar energy storage module. The inverter module is electrically connected to the solar energy storage module, the DC conversion module, the meter module and the load. Wherein, the DC conversion module detects the presence of solar power and detects that a surplus power flows through the meter module, and one of the first power of the solar power is inverted by the inverter module to supply power to the load, one of the solar power The second power is converted into a charging power by the DC conversion module to charge the battery module.
本創作的具體手段為利用一種併網供電系統,其中太陽能電力透過直流轉換模組的一次轉換,以對電池模組充電。再者,由於直流轉換模組所處位置為太陽能電力端,藉此透過檢測太陽能電力的電壓以獲取併網部分的工作資訊,致使實現整個系統的自動化控制。如此一來,本實施例確實提升併網供電系統的使用方便性。 The specific means of this creation is to utilize a grid-connected power supply system in which solar power is charged through a DC conversion module to charge the battery module. Furthermore, since the position of the DC conversion module is the solar power terminal, the voltage of the solar power is detected to obtain the working information of the grid-connected portion, so that the automatic control of the entire system is realized. In this way, the embodiment does improve the usability of the grid-connected power supply system.
為使能更進一步瞭解本創作之特徵及技術內容,請參閱以下有關本創作之詳細說明與附圖,但是此等說明與所附圖式僅係用來說明本創作,而非對本創作的權利範圍作任何的限制。 In order to further understand the features and technical contents of this creation, please refer to the following detailed description and drawings of this creation, but these descriptions and drawings are only used to illustrate this creation, not the right to this creation. The scope is subject to any restrictions.
1、1a、1b、1c‧‧‧併網供電系統 1, 1a, 1b, 1c‧‧‧ grid-connected power supply system
10‧‧‧電表模組 10‧‧‧Electrical Module
100‧‧‧偵測電路 100‧‧‧Detection circuit
12‧‧‧直流轉換模組 12‧‧‧DC conversion module
120‧‧‧控制電路 120‧‧‧Control circuit
122‧‧‧升降壓轉換電路 122‧‧‧ buck-boost conversion circuit
124‧‧‧檢測電路 124‧‧‧Detection circuit
14‧‧‧逆變模組 14‧‧‧Inverter Module
SP‧‧‧太陽能電力 SP‧‧‧Solar power
P1‧‧‧第一電力 P1‧‧‧First Power
P2‧‧‧第二電力 P2‧‧‧second power
CP‧‧‧充電電力 CP‧‧‧Charging power
DP‧‧‧電池電力 DP‧‧‧Battery power
T1‧‧‧傳輸線 T1‧‧‧ transmission line
DL‧‧‧直流負載 DL‧‧‧ DC load
IT‧‧‧逆變器 IT‧‧‧Inverter
B1‧‧‧電池模組 B1‧‧‧ battery module
E1‧‧‧市電 E1‧‧‧Power
S1‧‧‧太陽能蓄電模組 S1‧‧‧Solar power storage module
L1‧‧‧負載 L1‧‧‧ load
圖1為本創作一實施例之併網供電系統之示意圖。 FIG. 1 is a schematic diagram of a grid-connected power supply system according to an embodiment of the present invention.
圖2為本創作另一實施例之併網供電系統之運作示意圖。 FIG. 2 is a schematic diagram of the operation of the grid-connected power supply system according to another embodiment of the present invention.
圖3為本創作另一實施例之併網供電系統之運作示意圖。 FIG. 3 is a schematic diagram of the operation of a grid-connected power supply system according to another embodiment of the present invention.
圖4為本創作另一實施例之併網供電系統之示意圖。 4 is a schematic diagram of a grid-connected power supply system according to another embodiment of the present invention.
圖5為本創作另一實施例之併網供電系統之示意圖。 FIG. 5 is a schematic diagram of a grid-connected power supply system according to another embodiment of the present invention.
圖6為本創作另一實施例之併網供電系統之示意圖。 FIG. 6 is a schematic diagram of a grid-connected power supply system according to another embodiment of the present invention.
圖1為本創作一實施例之併網供電系統之示意圖。請參閱圖1。一種併網供電系統1,適用於將一太陽能蓄電模組S1所輸出一太陽能電力、一電池模組B1所輸出的一電池電力及一市電E1併網以供電給一負載L1。 FIG. 1 is a schematic diagram of a grid-connected power supply system according to an embodiment of the present invention. Please refer to Figure 1. A grid-connected power supply system 1 is adapted to supply a solar power stored by a solar energy storage module S1, a battery power outputted by a battery module B1, and a utility power E1 to be connected to a load L1.
在實務上,太陽能蓄電模組S1例如透過太陽能面板、控制器及太陽能蓄電器等其中之一或組合來實現。其中,太陽能面板用以接收到光能。太陽能蓄電器用以將光能轉換成電能。控制器透過最大功率追蹤以控制太陽能蓄電器所輸出的電能給逆變器,其中最大功率追蹤為偵測在日照的哪個時段或哪個角度具有最大功率的儲電效率。另電池模組B1例如包括至少一蓄電池、鉛蓄電池、鋰電池或可充電電池。本實施例不限制太陽能蓄電模組S1及電池模組B1的態樣。 In practice, the solar energy storage module S1 is realized by, for example, one or a combination of a solar panel, a controller, and a solar energy storage device. Among them, the solar panel is used to receive light energy. Solar energy storage devices are used to convert light energy into electrical energy. The controller controls the energy output by the solar energy storage device to the inverter through maximum power tracking, wherein the maximum power tracking is to detect which time period of the sunlight or which angle has the maximum power storage efficiency. The battery module B1 includes, for example, at least one battery, a lead storage battery, a lithium battery, or a rechargeable battery. This embodiment does not limit the aspects of the solar energy storage module S1 and the battery module B1.
詳細來說,併網供電系統1包括一電表模組10、一直流轉換模組12及一逆變模組14。在實務上,電表模組10電性連接於市電E1及負載L1之間。直流轉換模組12電性連接於電池模組B1、太陽能蓄電模組S1及逆變模組14之間。逆變模組14電性連接直流轉換模組12、太陽能蓄電模組S1、電表模組10及負載L1。 In detail, the grid-connected power supply system 1 includes an electric meter module 10, a continuous current conversion module 12, and an inverter module 14. In practice, the meter module 10 is electrically connected between the mains E1 and the load L1. The DC conversion module 12 is electrically connected between the battery module B1, the solar energy storage module S1, and the inverter module 14. The inverter module 14 is electrically connected to the DC conversion module 12, the solar energy storage module S1, the meter module 10, and the load L1.
電表模組10電性連接市電E1及負載L1。在實務上,電表模組10例如透過機械式電表、電子式電表、三相機械式電表、三相電子式電表或智慧型電表來實現。智慧型電表相較於電子式電表,智慧型電表更具有通訊讀表、即時資訊、品質監測、遠端控制及遠端韌體更新等功能。其中,電表模組10透過一偵測電路以量測市電E1電網上的電量、電流、電壓及電流方向。本實施例不限制電表模組10的態樣。 The meter module 10 is electrically connected to the mains E1 and the load L1. In practice, the meter module 10 is realized, for example, by a mechanical electric meter, an electronic electric meter, a three-phase mechanical electric meter, a three-phase electronic electric meter, or a smart electric meter. Compared with electronic meters, smart meters have the functions of communication meter reading, real-time information, quality monitoring, remote control and remote firmware update. The meter module 10 measures the power, current, voltage and current directions on the mains E1 grid through a detection circuit. This embodiment does not limit the aspect of the meter module 10.
值得一提的是,電表模組10透過一傳輸線T1與直流轉換模 組12通訊,傳輸線T1為全雙工或半雙工之通訊線。詳細來說,傳輸線T1例如具有RS-485介面,藉此實現半雙工通訊;或是傳輸線T1例如具有JAN介面,藉此實現全雙工通訊。在其他實施例中,電表模組10與直流轉換模組12亦可透過無線通訊來實現。例如電表模組10透過GPRS通訊系統、GSM通訊系統、wifi或其他射頻通訊,以傳輸多餘電力的資訊給直流轉換模組12。本實施例不限制電表模組10與直流轉換模組12之間的通訊態樣。 It is worth mentioning that the meter module 10 transmits a transmission line T1 and a DC conversion mode. Group 12 communication, transmission line T1 is a full-duplex or half-duplex communication line. In detail, the transmission line T1 has, for example, an RS-485 interface, thereby realizing half-duplex communication; or the transmission line T1 has, for example, a JAN interface, thereby realizing full-duplex communication. In other embodiments, the meter module 10 and the DC conversion module 12 can also be implemented by wireless communication. For example, the meter module 10 transmits information of excess power to the DC conversion module 12 through a GPRS communication system, a GSM communication system, wifi or other radio frequency communication. This embodiment does not limit the communication between the meter module 10 and the DC conversion module 12.
直流轉換模組12電性連接電池模組B1及太陽能蓄電模組S1。在實務上,直流轉換模組12例如透過直流-直流轉換電路、升降壓轉換電路、升壓電路及降壓電路等其中之一或組合來實現。其中,直流轉換模組12用以將太陽能電力轉換為一可對電池模組B1充電的電力,或是用以將電池電力轉換為一可供給逆變模組14逆變使用的電力。本實施例不限制直流轉換模組12的態樣。 The DC conversion module 12 is electrically connected to the battery module B1 and the solar energy storage module S1. In practice, the DC conversion module 12 is implemented by, for example, one or a combination of a DC-DC conversion circuit, a buck-boost conversion circuit, a boost circuit, and a step-down circuit. The DC conversion module 12 is configured to convert the solar power into a power that can charge the battery module B1, or to convert the battery power into a power that can be supplied to the inverter module 14 for inverter use. This embodiment does not limit the aspect of the DC conversion module 12.
一般來說,習知的併網供電系統係以電池逆變器電性連接於電表模組10與負載L1之間,且電池逆變器並未電性連接本實施例之太陽能蓄電模組S1及逆變模組14。其中,當太陽能蓄電模組S1產生較多的太陽能電力時,經由逆變模組14逆變後以供應較多的電力給負載L1。其中,負載L1如未完全耗用逆變模組14所逆變出的全部電力,則多餘電力將流向市電E1之電網上或流向電表模組10。因此,習知的併網供電系統係透過電池逆變器以將多餘電力逆變為直流電力,並對電池模組B1充電。 Generally, the conventional grid-connected power supply system is electrically connected between the meter module 10 and the load L1 by a battery inverter, and the battery inverter is not electrically connected to the solar power storage module S1 of the embodiment. And the inverter module 14. When the solar energy storage module S1 generates a large amount of solar power, the inverter module 14 inverts and supplies a large amount of power to the load L1. If the load L1 does not completely consume all the power inverted by the inverter module 14, the excess power will flow to the power grid of the mains E1 or flow to the meter module 10. Therefore, the conventional grid-connected power supply system inverts excess power into DC power through a battery inverter and charges the battery module B1.
因習知的併網供電系統透過二次的逆變轉換(一次逆變模組14及一次電池逆變器),藉此造成電能轉換效率不高、電能耗損、電能浪費或是拉長對電池模組B1充電的時間。然而,本實施例透過直流轉換模組12的設計,以取代習知的電池逆變器,以使電表模組10偵測出多餘電力時,一部份之太陽能電力將經由直流轉換模組12轉換為對電池模組B1充電的充電電力。因此,本實施例可降低多餘電力流向市電E1之電網上,並減少電能耗損以及提升 對電池模組B1充電的效率。 Because the conventional grid-connected power supply system passes the secondary inverter conversion (primary inverter module 14 and primary battery inverter), the power conversion efficiency is not high, the power consumption is lost, the power is wasted, or the battery module is elongated. Group B1 charging time. However, in this embodiment, when the design of the DC conversion module 12 is substituted for the conventional battery inverter so that the meter module 10 detects excess power, a portion of the solar power will pass through the DC conversion module 12 . It is converted into charging power for charging the battery module B1. Therefore, this embodiment can reduce the excess power flow to the power grid of the mains E1, and reduce the power consumption loss and increase The efficiency of charging the battery module B1.
此外,習知的電池逆變器亦無法瞭解到太陽能蓄電模組S1的資訊。因此,電池逆變器無法得知逆變模組14是否工作,藉此無法判斷何時對電池模組B1充電以及電池模組B1放電的時機。所以,習知的併網供電系統無法完全實現自動化控制。再者,習知的電池逆變器是掛在市電E1之電網上,實際上儲存於電池模組B1的電能有可能來自於市電E1的電能,而非是多餘電力。但是,本實施例透過直流轉換模組12可克服上述問題,以達到完全實現自動化控制,以及不使用市電E1來對電池模組B1充電之無法預期功效。 In addition, the conventional battery inverter cannot know the information of the solar energy storage module S1. Therefore, the battery inverter cannot know whether the inverter module 14 is operating, and thus it is impossible to judge when the battery module B1 is charged and the battery module B1 is discharged. Therefore, the conventional grid-connected power supply system cannot fully realize automatic control. Moreover, the conventional battery inverter is hung on the power grid of the mains E1. Actually, the electric energy stored in the battery module B1 may be from the electric energy of the mains E1, not the excess electric power. However, the present embodiment can overcome the above problems through the DC conversion module 12, so as to achieve fully automatic control, and the unpredictable effect of charging the battery module B1 without using the mains E1.
逆變模組14電性連接太陽能蓄電模組S1、直流轉換模組12、電表模組10及負載L1。在實務上,逆變模組14例如透過併網逆變器、全橋逆變器或半橋逆變器來實現。逆變模組14用以將直流電轉換為交流電,並提供交流電力給負載L1。例如逆變模組14為一併網逆變器,併網逆變器將太陽能電力逆變以供電給負載L1,於供電電力大於負載L1所消耗的電力時,併網逆變器將溢洩多餘電力至市電E1之電網。本實施例不限制逆變模組14的態樣。 The inverter module 14 is electrically connected to the solar energy storage module S1, the DC conversion module 12, the meter module 10, and the load L1. In practice, the inverter module 14 is implemented, for example, by a grid-connected inverter, a full-bridge inverter, or a half-bridge inverter. The inverter module 14 is configured to convert direct current into alternating current and provide alternating current power to the load L1. For example, the inverter module 14 is a grid-connected inverter, and the grid-connected inverter inverts the solar power to supply the load L1. When the power supply is greater than the power consumed by the load L1, the grid-connected inverter will overflow. Excess power to the grid of the mains E1. This embodiment does not limit the aspect of the inverter module 14.
基於上述,於逆變模組14逆變供電給負載L1,而溢洩多餘電力至市電E1之電網上時。也就是說,直流轉換模組12檢測出太陽能電力存在,並檢測出一多餘電力流經電表模組10時,太陽能電力之一第一電力經由逆變模組14逆變,以供電給負載L1。太陽能電力之一第二電力透過直流轉換模組12轉換為一充電電力,以對電池模組B1充電。 Based on the above, when the inverter module 14 inverts power supply to the load L1 and overflows excess power to the power grid of the commercial power E1. That is, when the DC conversion module 12 detects the presence of solar power and detects that an excess power flows through the meter module 10, one of the first powers of the solar power is inverted via the inverter module 14 to supply power to the load. L1. One of the solar power, the second power, is converted into a charging power by the DC conversion module 12 to charge the battery module B1.
直流轉換模組12檢測出太陽能電力無法滿足逆變模組14運作,且電池模組B1滿足放電條件時,電池模組B1輸出的電池電力,電池電力透過直流轉換模組12轉換為一直流電力,直流電力經由逆變模組14逆變以供電給負載L1。也就是說,當無太陽光、太陽光較微弱或太陽能面板接收到微弱光能時,電池模組B1及直 流轉換模組12將處於放電模式,並經由直流轉換模組12以輸出直流電力給逆變模組14,藉此逆變模組14可逆變輸出交流電給負載L1。 The DC conversion module 12 detects that the solar power cannot meet the operation of the inverter module 14, and when the battery module B1 meets the discharge condition, the battery power output by the battery module B1 and the battery power are converted into the DC power through the DC conversion module 12. The DC power is inverted via the inverter module 14 to supply power to the load L1. In other words, when there is no sunlight, the sunlight is weak, or the solar panel receives weak light energy, the battery module B1 and the straight The flow conversion module 12 will be in the discharge mode, and output DC power to the inverter module 14 via the DC conversion module 12, whereby the inverter module 14 can invert the output AC power to the load L1.
接下來,進一步說明併網供電系統1的運作情形。 Next, the operation of the grid-connected power supply system 1 will be further explained.
圖2為本創作另一實施例之併網供電系統之運作示意圖。圖3為本創作另一實施例之併網供電系統之運作示意圖。請參閱圖2及圖3。圖2所繪示為一太陽能電力SP充足,且市電E1之電網上具有多餘電力時的併網供電系統1之運作情形。 FIG. 2 is a schematic diagram of the operation of the grid-connected power supply system according to another embodiment of the present invention. FIG. 3 is a schematic diagram of the operation of a grid-connected power supply system according to another embodiment of the present invention. Please refer to Figure 2 and Figure 3. FIG. 2 is a diagram showing the operation of the grid-connected power supply system 1 when the solar power SP is sufficient and the power of the mains E1 has excess power.
詳細來說,電表模組10偵測出多餘電力時,電表模組10將透過傳輸線T1以通知直流轉換模組12,以使直流轉換模組12及電池模組B1處於充電模式。因此,太陽能電力SP將分流為第一電力P1及第二電力P2。其中第一電力P1流經逆變模組14,並經逆變轉換以供電給負載L1。而第二電力P2流經直流轉換模組12,並經升降壓轉換以供電給電池模組B1。所以,太陽能電力SP之一部分將直接轉換為對電池模組B1充電的充電電力CP,藉此降低市電E1之電網上之多餘電力的產生。 In detail, when the meter module 10 detects excess power, the meter module 10 transmits the transmission line T1 to notify the DC conversion module 12 so that the DC conversion module 12 and the battery module B1 are in the charging mode. Therefore, the solar power SP will be branched into the first power P1 and the second power P2. The first power P1 flows through the inverter module 14 and is inversely converted to supply power to the load L1. The second power P2 flows through the DC conversion module 12 and is converted to the battery module B1 by buck-boost conversion. Therefore, part of the solar power SP will be directly converted into the charging power CP for charging the battery module B1, thereby reducing the generation of excess power on the grid of the mains E1.
值得一提的是,當市電E1之電網上具有較小的多餘電力時,太陽能電力SP可分流出較小的第二電力P2,以對電池模組B1充電。同理可知,當市電E1之電網上具有較大的多餘電力時,太陽能電力SP可分流出較大的第二電力P2,以對電池模組B1充電。也就是說,當多餘電力越大時,第二電力P2也就越大,藉此降低市電E1之電網上的多餘電力產生,或是使多餘電力降至一預設值以下。 It is worth mentioning that when there is less excess power on the grid of the mains E1, the solar power SP can split the smaller second power P2 to charge the battery module B1. Similarly, when the power supply of the mains E1 has a large excess power, the solar power SP can split the larger second power P2 to charge the battery module B1. That is to say, when the excess power is larger, the second power P2 is larger, thereby reducing the generation of excess power on the power grid of the mains E1, or reducing the excess power to a predetermined value or less.
接著,圖3所繪示為一太陽能電力SP不足或無太陽能電力SP時的併網供電系統1之運作情形。當無太陽光、太陽光較微弱或太陽能面板接收到微弱光能時,直流轉換模組12檢測出太陽能電力SP無法滿足逆變模組14運作,且電池模組B1滿足放電條件。 因此,電池模組B1及直流轉換模組12將處於放電模式,並經由直流轉換模組12以輸出直流電力給逆變模組14,藉此逆變模組14可逆變輸出交流電給負載L1。 Next, FIG. 3 illustrates the operation of the grid-connected power supply system 1 when the solar power SP is insufficient or there is no solar power SP. When there is no sunlight, the sunlight is weak, or the solar panel receives weak light energy, the DC conversion module 12 detects that the solar power SP cannot satisfy the operation of the inverter module 14, and the battery module B1 satisfies the discharge condition. Therefore, the battery module B1 and the DC conversion module 12 are in the discharge mode, and output DC power to the inverter module 14 via the DC conversion module 12, whereby the inverter module 14 can invert the output AC power to the load L1. .
由此可知,相對於習知的併網供電系統不足之處,本實施例之太陽能電力SP通過直流轉換模組12的一次轉換,以對電池模組B1充電。再者,直流轉換模組12的轉換效率可做到比習知的電池逆變器更高。所以,本實施例之併網供電系統1的整體效率提升。 It can be seen that, compared with the conventional grid-connected power supply system, the solar power SP of the present embodiment is charged by the DC conversion module 12 to charge the battery module B1. Moreover, the conversion efficiency of the DC conversion module 12 can be made higher than that of the conventional battery inverter. Therefore, the overall efficiency of the grid-connected power supply system 1 of the present embodiment is improved.
由於直流轉換模組12所處位置為太陽能蓄電模組S1與逆變模組14之間。因此透過檢測太陽能電力SP的電壓以獲取併網部分的工作資訊,藉此實現整個系統的自動化控制。此外,本實施例之直流轉換模組12相對於習知的直流-交流轉換的電池逆變器。直流轉換模組12在設計上線路更加簡單、成本更低,藉此使得併網供電系統1具有較佳的競爭優勢。 The position of the DC conversion module 12 is between the solar energy storage module S1 and the inverter module 14. Therefore, by detecting the voltage of the solar power SP to obtain the working information of the grid-connected portion, automatic control of the entire system is realized. In addition, the DC conversion module 12 of the present embodiment is relative to a conventional DC-AC converted battery inverter. The DC conversion module 12 is simpler in design and lower in cost, thereby making the grid-connected power supply system 1 have a better competitive advantage.
進一步來說本實施例之併網供電系統的細部電路。 Further, the detailed circuit of the grid-connected power supply system of the embodiment.
圖4為本創作另一實施例之併網供電系統之示意圖。請參閱圖4。其中,電表模組10透過一偵測電路100以偵測多餘電力。在實務上,偵測電路100例如為量測市電E1之電網上的電流、電量、電壓或電流流向的量測電路。本實施例不限制偵測電路100的態樣。 4 is a schematic diagram of a grid-connected power supply system according to another embodiment of the present invention. Please refer to Figure 4. The meter module 10 transmits a detection circuit 100 to detect excess power. In practice, the detection circuit 100 is, for example, a measurement circuit that measures the flow of current, electricity, voltage or current on the grid of the mains E1. This embodiment does not limit the aspect of the detecting circuit 100.
此外,直流轉換模組12包括一控制電路120、一升降壓轉換電路122及一檢測電路124。在實務上,控制電路120電性連接升降壓轉換電路122。升降壓轉換電路122電性連接於電池模組B1、太陽能蓄電模組S1及逆變模組14之間。檢測電路124電性連接控制電路120與太陽能蓄電模組S1。本實施例不限制直流轉換模組12的態樣。 In addition, the DC conversion module 12 includes a control circuit 120, a buck-boost conversion circuit 122, and a detection circuit 124. In practice, the control circuit 120 is electrically connected to the buck-boost conversion circuit 122. The buck-boost conversion circuit 122 is electrically connected between the battery module B1, the solar energy storage module S1, and the inverter module 14. The detecting circuit 124 is electrically connected to the control circuit 120 and the solar power storage module S1. This embodiment does not limit the aspect of the DC conversion module 12.
控制電路120用以控制升降壓轉換電路122及電池模組B1的 充電運作或放電運作。也就是說,控制電路120用以控制升降壓轉換電路122中的開關之導通或截止,以使電力能雙向流動。例如電力自太陽能蓄電模組S1流經升降壓轉換電路122後,而流向電池模組B1;或是電力自電池模組B1流經升降壓轉換電路122後,而流向太陽能蓄電模組S1。 The control circuit 120 is configured to control the buck-boost conversion circuit 122 and the battery module B1. Charging operation or discharge operation. That is, the control circuit 120 is used to control the on or off of the switches in the buck-boost conversion circuit 122 to enable the power to flow in both directions. For example, the electric power flows from the solar energy storage module S1 through the buck-boost conversion circuit 122, and then flows to the battery module B1; or the electric power flows from the battery module B1 through the buck-boost conversion circuit 122, and then flows to the solar energy storage module S1.
另外,檢測電路124用以檢測太陽能電力的存在或太陽能電力的電壓、電流或其他參數。檢測電路124例如為檢測太陽能蓄電模組S1的電流、電量、電壓的量測電路。檢測電路124檢測出太陽能電力無法滿足逆變模組14運作,且電池模組B1滿足放電條件時,電池模組B1輸出的電池電力。電池電力透過直流轉換模組12的升降壓轉換電路122轉換為一直流電力,直流電力經由逆變模組14逆變以供電給負載L1。本實施例不限制控制電路120及檢測電路124的態樣。其餘部分均相同,在此不予贅述。 In addition, the detection circuit 124 is used to detect the presence of solar power or the voltage, current or other parameters of the solar power. The detection circuit 124 is, for example, a measurement circuit that detects the current, the amount of electricity, and the voltage of the solar energy storage module S1. The detecting circuit 124 detects that the solar power cannot satisfy the operation of the inverter module 14, and the battery module B1 outputs the battery power when the battery module B1 meets the discharging condition. The battery power is converted into DC power through the buck-boost conversion circuit 122 of the DC conversion module 12, and the DC power is inverted via the inverter module 14 to supply power to the load L1. This embodiment does not limit the aspects of the control circuit 120 and the detection circuit 124. The rest are the same and will not be repeated here.
圖5為本創作另一實施例之併網供電系統之示意圖。請參閱圖5。其中圖5中與圖1中的併網供電系統1b、1二者結構相似,而以下將對二者所包括的相同元件以相同標號表示。併網供電系統1b、1二者的差異在於:併網供電系統1b更包括一直流負載DL。 FIG. 5 is a schematic diagram of a grid-connected power supply system according to another embodiment of the present invention. Please refer to Figure 5. 5 is similar to the grid-connected power supply system 1b, 1 in FIG. 1, and the same components that are included in the following are denoted by the same reference numerals. The difference between the grid-connected power supply systems 1b and 1 is that the grid-connected power supply system 1b further includes the DC load DL.
在實務上,直流負載DL電性連接直流轉換模組12。直流轉換模組12用以供電給直流負載DL。直流負載DL例如耗用直流電的負載。其中直流負載DL例如為LED燈、風扇或其他直流裝置。本實施例不限制直流負載DL的態樣。其餘部分均相同,在此不予贅述。 In practice, the DC load DL is electrically connected to the DC conversion module 12. The DC conversion module 12 is used to supply power to the DC load DL. The DC load DL, for example, consumes a DC load. The DC load DL is, for example, an LED lamp, a fan or other DC device. This embodiment does not limit the aspect of the DC load DL. The rest are the same and will not be repeated here.
圖6為本創作另一實施例之併網供電系統之示意圖。請參閱圖6。其中圖6中與圖1中的併網供電系統1c、1二者結構相似,而以下將對二者所包括的相同元件以相同標號表示。併網供電系 統1c、1二者的差異在於:併網供電系統1c更包括一逆變器IT。在實務上,逆變器IT電性連接直流轉換模組12。直流轉換模組12用以供電給逆變器IT以進行電能逆變轉換。逆變器IT例如透過全橋逆變器或半橋逆變器來實現。本實施例不限制逆變器IT的態樣。 FIG. 6 is a schematic diagram of a grid-connected power supply system according to another embodiment of the present invention. Please refer to Figure 6. 6 is similar to the grid-connected power supply system 1c, 1 in FIG. 1, and the same components as those included in the following are denoted by the same reference numerals. Grid-connected power supply The difference between the two systems 1c and 1 is that the grid-connected power supply system 1c further includes an inverter IT. In practice, the inverter IT is electrically connected to the DC conversion module 12. The DC conversion module 12 is configured to supply power to the inverter IT for power inverter conversion. The inverter IT is realized, for example, by a full bridge inverter or a half bridge inverter. This embodiment does not limit the aspect of the inverter IT.
也就是說,直流轉換模組12除了可將電能儲存到電池模組B1外。同時也可對直流轉換模組12進行設計上的擴展,以實現直流電壓輸出給直流負載DL或逆變器IT使用,藉此滿足多樣化的儲能需求。其餘部分均相同,在此不予贅述。 That is to say, the DC conversion module 12 can store electrical energy outside the battery module B1. At the same time, the design of the DC conversion module 12 can be extended to realize the DC voltage output to the DC load DL or the inverter IT, thereby meeting diverse energy storage requirements. The rest are the same and will not be repeated here.
綜上所述,本創作提供一種併網供電系統,透過位於太陽能電力端之直流轉換模組以取得併網部分的工作資訊。且直流轉換模組未掛在市電電網上,藉此太陽能電力經由直流轉換模組的一次轉換,以對電池模組充電。也就是說,本實施例之併網供電系統克服習知之併網供電系統之「無法完全實現自動化控制」、「使用來自於市電的電能對電池模組充電」以及「無法判斷何時對電池模組充電以及電池模組放電的時機」等問題。如此一來,本實施例確實達到「完全實現自動化控制」、「降低二次電能轉換之損耗」以及「不使用市電來對電池模組充電」等之無法預期功效。 In summary, the present invention provides a grid-connected power supply system that obtains the working information of the grid-connected portion through a DC conversion module located at the solar power terminal. Moreover, the DC conversion module is not hung on the mains power grid, and the solar power is charged by the DC conversion module to charge the battery module. That is to say, the grid-connected power supply system of the present embodiment overcomes the "incomplete automation control" of the conventional grid-connected power supply system, "charges the battery module using power from the utility power", and "cannot determine when the battery module is being used. Problems such as charging and timing of battery module discharge. In this way, the present embodiment achieves the unpredictable effects of "fully implementing automatic control", "reducing the loss of secondary power conversion", and "charging the battery module without using the commercial power."
以上所述僅為本創作的實施例,其並非用以限定本創作的專利保護範圍。任何熟習相像技藝者,在不脫離本創作的精神與範圍內,所作的更動及潤飾的等效替換,仍為本創作的專利保護範圍內。 The above description is only an embodiment of the present invention, and is not intended to limit the scope of patent protection of the present invention. Anyone who is familiar with the art of the artist, within the spirit and scope of the creation, the equivalent of the change and retouching is still within the scope of the patent protection of the creation.
1‧‧‧併網供電系統 1‧‧‧Grid-connected power supply system
10‧‧‧電表模組 10‧‧‧Electrical Module
12‧‧‧直流轉換模組 12‧‧‧DC conversion module
14‧‧‧逆變模組 14‧‧‧Inverter Module
T1‧‧‧傳輸線 T1‧‧‧ transmission line
B1‧‧‧電池模組 B1‧‧‧ battery module
E1‧‧‧市電 E1‧‧‧Power
S1‧‧‧太陽能蓄電模組 S1‧‧‧Solar power storage module
L1‧‧‧負載 L1‧‧‧ load
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