TWM512065U - Renewable energy power supply device for providing AC/AC power supply device with hybrid power - Google Patents
Renewable energy power supply device for providing AC/AC power supply device with hybrid power Download PDFInfo
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- TWM512065U TWM512065U TW104212715U TW104212715U TWM512065U TW M512065 U TWM512065 U TW M512065U TW 104212715 U TW104212715 U TW 104212715U TW 104212715 U TW104212715 U TW 104212715U TW M512065 U TWM512065 U TW M512065U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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本創作係關於一種提供交流轉交流供電裝置混合電源之再生能源供電裝置,更特別的是關於一種無須使用電源自動切換開關(ATS),進而提供一種能使再生能源發電設備(例如太陽能發電設備)之電力饋入至該供電系統而達到自產自用目的且無須多次轉換的再生能源供電裝置及再生能源供電系統。The present invention relates to a regenerative power supply device that provides a hybrid power supply for an AC-to-AC power supply device, and more particularly to an automatic power switch (ATS) that does not require the use of an electric power source, such as a solar power generation device. The regenerative power supply device and the regenerative energy supply system that the electric power is fed to the power supply system to achieve the self-use purpose and do not need to be converted multiple times.
各種電器產品大部分都採用交流電源供電,舉例來說,通常採用110V/220V且頻率為60赫茲(Hz)的單相交流電源,或者,採用220V/380V且頻率為60Hz的三相交流電。實際上,這是為了配合電力公司的電力供應而設計,因為電力公司的發電機大多是旋轉式發電機,其能量來自周而復始之產生正負電交錯輸出之循環,故電力公司所供應之電力(又稱為市電)一般是選擇以交流電的方式來供應。進一步地,當該交流電器為旋轉式機械(例如馬達、壓縮機)時,因電力公司提供固定頻率(60Hz)的交流電之緣故,讓該旋轉式機械之轉速也隨之被固定,因此,需額外透過變頻器調整電源的頻率來改變轉速,達到平穩之速度增減。Most of the electrical products are powered by an AC power source. For example, a single-phase AC power source of 110 V/220 V and a frequency of 60 Hertz (Hz) is usually used, or a three-phase AC power of 220 V/380 V and a frequency of 60 Hz is used. In fact, this is designed to match the power supply of the power company, because the generators of the power companies are mostly rotary generators, and their energy comes from the cycle of generating positive and negative electric cross-outputs, so the power supplied by the power company (again It is called commercial power. It is generally chosen to be supplied by means of alternating current. Further, when the alternating current appliance is a rotary machine (for example, a motor or a compressor), since the power company supplies a fixed frequency (60 Hz) alternating current, the rotation speed of the rotary machine is also fixed, and therefore, The frequency of the power supply is additionally adjusted by the frequency converter to change the speed to achieve a smooth increase or decrease in speed.
請參照圖1,係為習知變頻器100之內部電路之示意圖,用以說明變頻器100內部之工作原理,該變頻器係將交流電源轉換成直流電再透過功率晶體的交互切換來產生頻率可受控的交流電。如圖1所示,電力公司所供應之交流電透過第一電源端101及第二電源端102來輸入,經單流向整流器103整流後,於電容C1之兩端的第一節點104及第二節點105之間形成一直流電VDC,接著透過 第一電晶體Q1、第二電晶體Q2、第三電晶體Q3、及第四電晶體Q4組合成之換相電路,在第一電源輸出端106及第二電源輸出端107之間產出一交流電,且透過由導通第一電晶體Q1和第四電晶體Q4之狀態交替到導通第二電晶體Q2和第三電晶體Q3之狀態的速度之調整,可改變第一電源輸出端106及第二電源輸出端107之間交流電的頻率而達到變頻的效果,進而更可達到控制馬達轉速的目的。Please refer to FIG. 1 , which is a schematic diagram of an internal circuit of the conventional frequency converter 100 for explaining the working principle of the internal frequency converter 100. The frequency converter converts the alternating current power into a direct current and then exchanges power crystals to generate a frequency. Controlled AC power. As shown in FIG. 1, the AC power supplied by the power company is input through the first power terminal 101 and the second power terminal 102, and after being rectified by the single current to the rectifier 103, the first node 104 and the second node 105 at both ends of the capacitor C1. Form a constant current VDC, and then pass through The first transistor Q1, the second transistor Q2, the third transistor Q3, and the fourth transistor Q4 are combined into a commutation circuit, and a first power output terminal 106 and a second power output terminal 107 are outputted. The first power source output 106 and the first power source can be changed by adjusting the speed of the state in which the first transistor Q1 and the fourth transistor Q4 are turned on alternately to the state in which the second transistor Q2 and the third transistor Q3 are turned on. The frequency of the alternating current between the two power output terminals 107 achieves the effect of frequency conversion, and thus the purpose of controlling the motor speed can be achieved.
在其他能源的應用上,如:太陽能,由於此種能源之發電設備的輸出功率易受其他因素(如:天候、環境因素等)影響,無法持續穩定供電,請參照圖2,為解決上述問題,遂有市電並聯型太陽能發電系統200之發展,圖2係習知之市電並聯型太陽能發電系統200之示意圖,透過一市電並聯型換流器201,將太陽能發電設備202產生之直流電先轉換成交流電後,併入市電電網203,再藉由變頻器100轉換市電電網203輸入之交流電的頻率來控制交流電器204之轉速,達到節能之效果。In other energy applications, such as solar energy, the output power of power generation equipment due to such energy is easily affected by other factors (such as weather, environmental factors, etc.) and cannot be stably supplied. Please refer to Figure 2 to solve the above problems. The development of the commercial parallel power solar power system 200 is shown in FIG. 2, which is a schematic diagram of a conventional commercial parallel power solar power system 200. The direct current generated by the solar power generating device 202 is first converted into an alternating current through a commercial parallel converter 201. Thereafter, the mains grid 203 is incorporated, and the frequency of the alternating current input from the mains grid 203 is converted by the inverter 100 to control the rotation speed of the alternating current unit 204, thereby achieving the effect of energy saving.
在太陽能發電系統之實際應用上,為了解決需要電池儲能,造成成本過高的問題,遂有市電並聯型太陽能系統該系統係將太陽能產出電力即時饋入市電電網,安裝市電並聯型太陽能發電系統200的用戶係以一約定價格將太陽能發電設備202所產生的電力全部灌回電力公司之市電電網203,以將太陽能發電設備202的電力產出直接售予電力公司,也因此,傳統上的市電並聯型太陽能發電系統200並無法指定某部分電力輸出至特定負載,故難以達到綠色能源自產自用的目的。此外,就應用層面而言,市電並聯型太陽能發電系統200還有許多不適合之處,舉例來說,市電並聯型太陽能發電系統200必須額外裝設斷電裝置205,此乃因為市電並聯型太陽能發電系統200將太陽能發電設備202的電力全部灌回電力公司之市電電網203的過程中,可能產生安全疑慮,例如在電力公司 檢修市電電網203時,需將供電給市電電網203的所有電力源關閉,才能確保安全,此時,若太陽能發電設備202的電力仍持續灌回電力公司之市電電網203,則可能危及維修人員甚至整個市電系統的安全,更甚者,有些國家的電力法令根本不允許市電並聯型太陽能發電系統200的使用。In the practical application of solar power generation system, in order to solve the problem of requiring battery energy storage and causing excessive cost, there is a commercial parallel power solar system. The system directly feeds solar power into the utility grid and installs commercial parallel power generation. The user of the system 200 charges all the power generated by the solar power generation device 202 to the utility grid 203 of the power company at an agreed price to directly sell the power output of the solar power generation device 202 to the power company, and thus, conventionally The mains parallel solar power generation system 200 cannot specify a certain part of the power output to a specific load, so it is difficult to achieve the purpose of self-production of green energy. In addition, as far as the application level is concerned, there is still a lot of unsuitability for the commercial parallel solar power generation system 200. For example, the commercial power parallel solar power generation system 200 must additionally be equipped with a power-off device 205 because of the parallel power generation of the commercial power. The system 200 may inject all of the power of the solar power plant 202 back into the utility grid 203 of the power company, which may create safety concerns, such as in a power company. When the mains grid 203 is overhauled, all the power sources supplied to the mains grid 203 need to be shut down to ensure safety. At this time, if the power of the solar power generating equipment 202 is still continuously returned to the utility grid 203 of the power company, the maintenance personnel may be endangered. The safety of the entire mains system, and even worse, the power law of some countries does not allow the use of the mains parallel solar power system 200.
請參照圖3,為使太陽能發電能自產自用傳統上使用獨立/混合型太陽能發電系統400,其具有獨立型太陽能充電控制器301、太陽能發電設備302、電池組303、換流器304、及變頻器100,及在換流器304及變頻器100之間設置電源自動切換開關(ATS,Automatic Transfer Switches)401,達到使輸出不斷電的效果。自動切換開關401係為一種在兩組電源系統間進行切換之裝置。於組合型太陽能發電系統400中,電源自動切換開關401係在太陽能發電系統402及市電系統403之間進行切換。然而,於實施時,太陽能發電系統402首先必須將太陽能發電設備302產生之直流電儲存在電池組303,然後藉由電源自動切換開關401確認選擇電池組303之電力足夠後,選擇由太陽能發電系統402作為獨立輸出之電源系統,亦即,開啟太陽能發電系統402之電力輸入路徑,同時關閉市電系統403之電力輸入路徑,此時,電池組303儲存之直流電會由換流器304轉換為交流電,隨後經電源自動切換開關401輸出至變頻器100,讓變頻器100單獨接收太陽能發電系統402之電力以供應交流電器404。也就是說,此型太陽能發電系統400不但必須具備電源自動切換開關401,始得據以太陽能發電系統供電不足時加以切換至由市電完全取代太陽能供電,,還必須將太陽能發電設備302產生之直流電轉換成交流電,才能提供給變頻器100使用,導致轉換效率不佳,此外,電池組303亦需要定時更換,且存在故障之風險。Referring to FIG. 3, in order to enable solar power generation to be self-produced, the independent/hybrid solar power generation system 400 is conventionally used, which has a stand-alone solar charge controller 301, a solar power generation device 302, a battery pack 303, an inverter 304, and The inverter 100 and an automatic transfer switch (ATS) 401 are provided between the inverter 304 and the inverter 100 to achieve an effect of continuously outputting the output. The automatic changeover switch 401 is a device that switches between two sets of power supply systems. In the combined solar power generation system 400, the power automatic switch 401 is switched between the solar power generation system 402 and the commercial power system 403. However, in implementation, the solar power generation system 402 must first store the direct current generated by the solar power generation device 302 in the battery pack 303, and then confirm that the power of the selected battery pack 303 is sufficient by the power automatic switch 401 to select the solar power generation system 402. As a separate output power system, that is, the power input path of the solar power generation system 402 is turned on, and the power input path of the mains system 403 is turned off. At this time, the direct current stored in the battery pack 303 is converted into alternating current by the inverter 304, and then The power supply automatic switch 401 is output to the frequency converter 100, and the frequency converter 100 separately receives the power of the solar power generation system 402 to supply the alternating current appliance 404. That is to say, this type of solar power generation system 400 must not only have the power automatic switch 401, but also switch to the solar power supply completely replaced by the commercial power when the solar power generation system is insufficiently supplied, and the direct current generated by the solar power generation device 302 must also be generated. The conversion to AC power can be provided to the inverter 100, resulting in poor conversion efficiency. In addition, the battery pack 303 also needs to be replaced periodically, and there is a risk of failure.
基於此,習知技術皆存在著非市電之其他直流電力來源(如太陽能)的反覆轉換,造成發電效率低落,發電成本亦居高不下。Based on this, the conventional technologies all have the reverse conversion of other DC power sources (such as solar energy) that are not commercial power, resulting in low power generation efficiency and high power generation costs.
為解決上述習知技術的問題,本創作之目的在於無須使用電源自動切換開關(ATS),亦無須將電力多次轉換,進而提供一種能使直流發電模組之電力饋入至交流轉交流供電裝置(例如變頻器)之直流側(DC BUS)而達到自產自用目的且無須多次轉換而具有高效率之提供交流轉交流供電裝置混合電源之再生能源供電裝置。In order to solve the above problems of the prior art, the purpose of the creation is that it is not necessary to use an automatic power switch (ATS), and there is no need to convert the power multiple times, thereby providing a way to feed the power of the DC power generation module to the AC to AC power supply. A regenerative power supply device that provides a high-efficiency AC-AC power supply hybrid power supply with a DC side (DC BUS) of a device (for example, a frequency converter) for self-production purposes and without multiple conversions.
本創作之另一目的在於適時提供市電補償,而非市電取代,讓交流轉交流供電裝置(例如變頻器)成為市電及再生能源混合供電之裝置。Another purpose of this creation is to provide commercial power compensation at the right time instead of replacing the mains, so that the AC-to-AC power supply (such as the inverter) becomes a hybrid power supply device for the mains and renewable energy.
為達上述目的及其他目的,本創作係提供一種提供一交流轉交流供電裝置混合電源之再生能源供電裝置,係設置在一直流發電設備之電力輸出端與該交流轉交流供電裝置(例如變頻器)之直流側(DC BUS)之間,以與該交流轉交流供電裝置之既有的交流電力源進行混合供電,既有的交流電力源係藉由該整流器轉為直流電形成該交流轉交流供電裝置之直流側,其特徵在於:該再生能源供電裝置設有偵測該交流轉交流供電裝置之直流側電壓狀況的一電壓偵測電路,該再生能源供電裝置設有根據該電壓偵測電路之偵測結果選擇性地轉換該直流發電設備之輸出電壓的一電壓轉換電路,該再生能源供電裝置設有耦接於該電壓轉換電路與該交流轉交流供電裝置直流側間的一整流元件,該電壓轉換電路係調整該直流發電設備之輸出電壓而輸出一轉換電壓,於所調整之該轉換電壓之電壓準位低於既有的交流電力源作用於該交流轉交流供電裝置直流側 的電壓準位時,該整流元件係截止該電壓轉換電路與該交流轉交流供電裝置直流側間的電力,以防止其逆灌至該電壓轉換電路。For the above purposes and other purposes, the present invention provides a regenerative power supply device for providing a hybrid power supply of an AC to AC power supply device, which is disposed at a power output end of a DC power generation device and the AC to AC power supply device (for example, a frequency converter) The DC side (DC BUS) is mixed and supplied with the existing AC power source of the AC-AC power supply device, and the existing AC power source is converted into DC power by the rectifier to form the AC-to-AC power supply. The DC side of the device is characterized in that: the regenerative power supply device is provided with a voltage detecting circuit for detecting a DC side voltage condition of the AC to AC power supply device, and the regenerative energy supply device is provided according to the voltage detecting circuit a voltage conversion circuit that selectively converts an output voltage of the DC power generation device, the regenerative power supply device is provided with a rectifying component coupled between the voltage conversion circuit and a DC side of the AC to AC power supply device, The voltage conversion circuit adjusts an output voltage of the DC power generation device to output a conversion voltage, and the adjusted conversion The voltage level of the voltage change is lower than the existing AC power source acting on the DC side of the AC to AC power supply device At the voltage level, the rectifying element turns off the power between the voltage conversion circuit and the DC side of the AC to AC power supply to prevent it from being reversed to the voltage conversion circuit.
在上述之再生能源供電裝置中,該整流元件係為一個二極體或多個二極體的串接,該電壓轉換電路係根據一預設時間內該電壓偵測電路偵測的電壓,該電壓轉換電路轉換該直流發電設備之輸出電壓略高於該交流轉交流供電裝置之直流源電壓以使該直流供電設備提供電力至該交流轉交流供電裝置。In the above-mentioned regenerative power supply device, the rectifying component is a diode or a plurality of diodes connected in series, and the voltage conversion circuit is based on a voltage detected by the voltage detecting circuit within a preset time. The voltage conversion circuit converts the output voltage of the DC power generation device to be slightly higher than the DC source voltage of the AC to AC power supply device to enable the DC power supply device to supply power to the AC to AC power supply device.
為達上述目的及其他目的,本創作復提供一種太陽能供電裝置,設置在一太陽能發電設備之電力輸出端一交流轉交流供電裝置之直流側之間,以與輸入至該交流轉交流供電裝置的既有之交流電力源進行混合供電,既有的交流電力源係藉由整流器轉為直流電而作用於該交流轉交流供電裝置之直流側,該太陽能供電裝置包括:一電壓偵測電路,係耦接該交流轉交流供電裝置,以根據該交流轉交流供電裝置之直流側的電壓狀況而產生一偵測電壓準位;一電壓轉換電路,係耦接該電壓偵測電路、該交流轉交流供電裝置及該太陽能發電設備之電力輸出端,用於根據該偵測電壓準位選擇性地轉換該太陽能發電設備之一輸出電壓,以調整該輸出電壓而輸出一轉換電壓;及一整流元件,係設置於該電壓轉換電路及該交流轉交流供電裝置之直流側之間的電力傳輸路徑上,於所調整之該轉換電壓之電壓準位低於該偵測電壓準位時,該整流元件係截止該電壓轉換電路與該交流轉交流供電裝置直流側間的電力,以防止其逆灌至該電壓轉換電路。In order to achieve the above purposes and other purposes, the present invention provides a solar power supply device disposed between a power output end of a solar power generation device and a DC side of an AC to AC power supply device for input to the AC to AC power supply device. The existing AC power source is used for hybrid power supply, and the existing AC power source is converted to DC power by the rectifier to act on the DC side of the AC to AC power supply device. The solar power supply device includes: a voltage detection circuit, coupled Connecting the AC to the AC power supply device to generate a detection voltage level according to the voltage condition of the DC side of the AC to AC power supply device; a voltage conversion circuit coupled to the voltage detection circuit, the AC to AC power supply The device and the power output end of the solar power generation device are configured to selectively convert an output voltage of the solar power generation device according to the detection voltage level to adjust the output voltage to output a conversion voltage; and a rectifying component a power transmission path disposed between the voltage conversion circuit and the DC side of the AC to AC power supply device When the adjusted voltage level of the conversion voltage is lower than the detection voltage level, the rectifying element cuts off the power between the voltage conversion circuit and the DC side of the AC to AC power supply device to prevent it from being reversed to The voltage conversion circuit.
在上述之太陽能供電裝置中,該電壓轉換電路係根據一預設時間內該電壓偵測電路皆有偵測到電壓時,該電壓轉換電路轉換並調整該直流發電設備之輸出電壓以輸出該轉換電壓。In the above solar power supply device, the voltage conversion circuit converts and adjusts the output voltage of the DC power generation device to output the conversion when the voltage detection circuit detects a voltage according to a preset time. Voltage.
在上述之太陽能供電裝置中,該電壓轉換電路係屬於升壓型(boost)、降壓型(buck)、或升降壓型(boost-buck)電路當中之其一者。In the solar power supply device described above, the voltage conversion circuit is one of a boost type, a buck type, or a boost-buck type circuit.
在上述之太陽能供電裝置中,該電壓轉換電路係屬於隔離型或非隔離型電路當中之其一者。In the above solar power supply device, the voltage conversion circuit is one of an isolated or non-isolated circuit.
在上述之太陽能供電裝置中,該整流元件係為一個二極體或多個二極體的串接。In the solar power supply device described above, the rectifying element is a series connection of a diode or a plurality of diodes.
為達上述目的及其他目的,本創作復提供一種太陽能供電系統,包括:一太陽能發電設備,係用於將太陽能轉換成電力而產生一輸出電壓;一交流轉交流轉交流供電裝置,具有一直流側(DC Bus)及一交流電源輸入端,該交流轉交流供電裝置之交流電源輸入端連接一市電電網,該交流轉交流供電裝置之直流側連接該太陽能發電設備,以分別接收該市電電網之電力及該太陽能發電設備之電力;及前述的太陽能供電控制器,設置於該太陽能發電設備之電力輸出端及該交流轉交流轉交流供電裝置之直流側(DC Bus)之間。For the above purposes and other purposes, the present invention provides a solar power supply system comprising: a solar power generation device for converting solar energy into electricity to generate an output voltage; an AC to AC to AC power supply device having a continuous flow a DC bus and an AC power input end, the AC power input end of the AC to AC power supply device is connected to a mains power grid, and the DC side of the AC to AC power supply device is connected to the solar power generation device to respectively receive the mains power grid The power and the power of the solar power generation device; and the solar power supply controller described above are disposed between the power output end of the solar power generation device and the DC bus of the AC to AC power supply device.
在上述之太陽能供電系統中,該交流轉交流轉交流供電裝置係為一變頻器。In the above solar power supply system, the AC to AC to AC power supply device is a frequency converter.
在上述之太陽能供電系統中,該交流轉交流供電裝置之直流側可以是一功因修正電路。In the above solar power supply system, the DC side of the AC to AC power supply device may be a power factor correction circuit.
藉此,本創作藉由上述之再生能源供電裝置(例如太陽能供電裝置)及再生能源供電系統(例如太陽能供電系統),偵測該交流轉交流供電裝置(通常指VVVF INVERTER,變壓變頻式換流器)之直流側(DC BUS)的電壓,並根據該交流轉交流供電裝置之直流側的電壓,轉換再生能源發電設備(例如太陽能發電設備)的電壓使其略高於直流側電壓,以提供電力至交流轉交流供電裝置。據 此,本創作可降低對既有的交流電源的電力需求,達到混合再生能源之直流電力及市電電網之交流電力(即既有的交流電源)同時供電之效果。換言之,本創作可達到以最少的設備將再生能源之直流電力供應至交流設備的目的,而無須對發電設備所產出的電力進行多次的重複轉換,且由於該交流供電設備內部具有整流器,而不致使直流供電設備之電力回灌到市電電網,從而能達到再生能源高效率自產自用之效。因此,本創作無須使用電源自動切換開關(ATS),亦無須將電力多次轉換,進而可提供一種讓供電系統自產自用太陽能發電模組產生的電力之高效率之再生能源供電裝置。Therefore, the present invention detects the AC-to-AC power supply device by using the above-mentioned renewable energy power supply device (for example, a solar power supply device) and a renewable energy power supply system (for example, a solar power supply system) (generally referred to as VVVF INVERTER, variable voltage frequency conversion type) The voltage of the DC side of the current transformer (DC BUS), and according to the voltage of the DC side of the AC-to-AC power supply device, converts the voltage of the renewable energy power generation device (for example, a solar power generation device) to be slightly higher than the DC-side voltage, Provide power to AC to AC power supply. according to Therefore, the creation can reduce the power demand of the existing AC power source, and achieve the effect of simultaneously supplying the DC power of the hybrid energy source and the AC power of the utility power grid (that is, the existing AC power source). In other words, the creation can achieve the purpose of supplying the DC power of the renewable energy to the AC equipment with a minimum of equipment, without repeatedly switching the power generated by the power generation equipment, and since the AC power supply equipment has a rectifier inside, It does not cause the power of the DC power supply equipment to be recharged to the mains power grid, so that the renewable energy can be efficiently produced and used for self-production. Therefore, this creation does not require the use of an automatic power switch (ATS), and does not require multiple conversions of power, thereby providing a highly efficient regenerative power supply device that allows the power supply system to generate electricity from the self-contained solar power module.
100‧‧‧變頻器100‧‧‧Inverter
101‧‧‧第一電源端101‧‧‧First power terminal
102‧‧‧第二電源端102‧‧‧second power terminal
103‧‧‧整流器103‧‧‧Rectifier
104‧‧‧第一節點104‧‧‧ first node
105‧‧‧第二節點105‧‧‧second node
106‧‧‧第一電源輸出端106‧‧‧First power output
107‧‧‧第二電源輸出端107‧‧‧second power output
200‧‧‧市電並聯型太陽能發電系統200‧‧‧Commercial parallel solar power system
201‧‧‧市電並聯型換流器201‧‧‧Commercial parallel inverter
202‧‧‧太陽能發電設備202‧‧‧Solar power equipment
203‧‧‧市電電網203‧‧‧mains grid
204‧‧‧交流電器204‧‧‧AC appliances
300‧‧‧獨立型太陽能發電系統300‧‧‧Independent Solar Power System
301‧‧‧獨立型太陽能充電控制器301‧‧‧Independent Solar Charge Controller
302‧‧‧太陽能發電設備302‧‧‧Solar power equipment
303‧‧‧電池組303‧‧‧Battery Pack
304‧‧‧換流器304‧‧‧Inverter
305‧‧‧交流電器305‧‧‧AC electrical appliances
400‧‧‧獨立/混合型太陽能發電系統400‧‧‧Independent/hybrid solar power systems
401‧‧‧電源自動切換開關401‧‧‧Power automatic switch
402‧‧‧太陽能發電系統402‧‧‧Solar power system
403‧‧‧市電系統403‧‧‧Power system
404‧‧‧交流電器404‧‧‧AC appliances
500‧‧‧太陽能供電系統500‧‧‧Solar power supply system
510‧‧‧太陽能發電設備510‧‧‧Solar power equipment
520‧‧‧太陽能供電裝置520‧‧‧Solar power supply
521‧‧‧電壓偵測電路521‧‧‧Voltage detection circuit
522‧‧‧電壓轉換電路522‧‧‧Voltage conversion circuit
523‧‧‧整流元件523‧‧‧Rectifying components
531‧‧‧市電電力輸入端531‧‧‧mains power input
540‧‧‧交流轉交流供電裝置540‧‧‧AC to AC power supply
543‧‧‧單流向整流器543‧‧‧Single flow rectifier
550‧‧‧交流電器550‧‧‧AC appliances
603‧‧‧直流側603‧‧‧ DC side
C1‧‧‧電容C1‧‧‧ capacitor
VDC‧‧‧直流電VDC‧‧‧DC
Q1‧‧‧第一電晶體Q1‧‧‧First transistor
Q2‧‧‧第二電晶體Q2‧‧‧Second transistor
Q3‧‧‧第三電晶體Q3‧‧‧ Third transistor
Q4‧‧‧第四電晶體Q4‧‧‧4th transistor
[圖1]係習知變頻器之內部電路之示意圖。[Fig. 1] is a schematic diagram of an internal circuit of a conventional inverter.
[圖2]係習知市電並聯型太陽能發電系統之示意圖。[Fig. 2] A schematic diagram of a conventional utility electric parallel solar power generation system.
[圖3]係習知獨立/混合型太陽能發電系統之示意圖。[Fig. 3] A schematic view of a conventional independent/hybrid solar power generation system.
[圖4]係本創作之太陽能供電系統之第一實施例之系統架構圖。[Fig. 4] is a system architecture diagram of a first embodiment of the solar power supply system of the present invention.
[圖5]係本創作之太陽能供電系統之第一實施例內部之太陽能供電裝置的功能方塊圖。[Fig. 5] is a functional block diagram of a solar power supply device inside the first embodiment of the solar power supply system of the present invention.
[圖6]係本創作之太陽能供電系統之第二實施例之示意圖。Fig. 6 is a schematic view showing a second embodiment of the solar power supply system of the present invention.
[圖7]係本創作之太陽能供電系統之第三實施例之示意圖。Fig. 7 is a schematic view showing a third embodiment of the solar power supply system of the present invention.
為充分瞭解本創作之目的、特徵及功效,茲藉由下述具體之實施例,並配合所附之圖式,對本創作做一詳細說明,說明如後: 請參照圖4,係本創作之太陽能供電系統500之第一實施例之系統架構圖,如圖4所示,該太陽能供電系統500包含一太陽能發電設備510、一太陽能供電裝置520及一交流轉交流供電裝置540,以與一市電電網530進行混合供電,提供予一交流電器550。該市電電網530係屬電力公司之電力系統的一部分(亦即屬既有的交流電力源),於此係以一功能方塊做表示;該交流轉交流供電裝置540可為一種如圖1所述之變頻器100,用以改變交流電的頻率,進而達到控制馬達轉速的目的,該交流轉交流供電裝置540亦可為輸出固定頻率(例如50Hz或60Hz)之交流轉交流供電裝置,本創作並不以變頻器100之實施態樣為限;該交流電器550係為負載,可為一個或多個,於此僅為一種示例;該太陽能發電設備510係為一習知裝置,可包含有太陽能板及其他裝置,用以將太陽能轉換成直流電力輸出,於本創作中,該太陽能發電設備510係為直流發電設備的一示例,各種直接產生直流電壓的發電設備或經轉換後為直流電壓輸出的發電設備皆適用本創作。In order to fully understand the purpose, features and effects of this creation, the following specific examples, together with the attached drawings, provide a detailed description of the creation, as explained below: Please refer to FIG. 4 , which is a system architecture diagram of a first embodiment of the solar power supply system 500 of the present invention. As shown in FIG. 4 , the solar power system 500 includes a solar power generation device 510 , a solar power supply device 520 , and an AC transfer . The AC power supply device 540 is mixed with a mains power grid 530 and supplied to an AC appliance 550. The utility power grid 530 is part of the power system of the power company (that is, an existing AC power source), and is represented by a functional block; the AC-to-AC power supply device 540 can be a type as shown in FIG. The frequency converter 100 is used to change the frequency of the alternating current to achieve the purpose of controlling the motor speed. The alternating current alternating current power supply device 540 can also be an alternating current alternating current power supply device that outputs a fixed frequency (for example, 50 Hz or 60 Hz). The embodiment of the inverter 100 is limited to a load; the AC 550 is a load, which may be one or more. This is merely an example; the solar power generation device 510 is a conventional device and may include a solar panel. And other devices for converting solar energy into direct current power output. In the present creation, the solar power generation device 510 is an example of a direct current power generation device, and various power generation devices directly generating a direct current voltage or converted to a direct current voltage output. This creation is applicable to power generation equipment.
本創作之太陽能供電裝置520係設置在該太陽能發電設備510之電力輸出端及該交流轉交流供電裝置540之間,用以偵測該交流轉交流供電裝置540之輸入側的電壓,並根據該交流轉交流供電裝置540輸入側的電壓,轉換由該太陽能發電設備510之電力輸入端所輸入之電力的電壓至一預設電壓準位,該交流轉交流供電裝置540分別耦接該太陽能供電裝置520及該市電電網530,以分別接收該太陽能供電裝置520轉換該太陽能發電設備510的電力後所產生的直流電力及該市電電網530所輸入的交流電力,以進行混合供電。The solar power supply device 520 of the present invention is disposed between the power output end of the solar power generation device 510 and the AC to AC power supply device 540 for detecting the voltage on the input side of the AC to AC power supply device 540, and according to the The voltage of the input side of the alternating current power supply device 540 is converted to a predetermined voltage level by the voltage of the power input from the power input end of the solar power generation device 510, and the alternating current alternating current power supply device 540 is coupled to the solar power supply device 520 and the utility power grid 530 respectively receive the DC power generated by the solar power supply device 520 after converting the power of the solar power generation device 510 and the AC power input by the utility power grid 530 to perform hybrid power supply.
請參照圖5,係本創作之太陽能供電系統500之第一實施例內部之太陽能供電裝置520的功能方塊圖,用以說明圖4中該太陽能供電裝置520的其中 一種內部配置,但並不被限制在如圖4所示的實施例中。如圖5所示,該太陽能供電裝置520包含一電壓偵測電路521、一電壓轉換電路522、及一整流元件523,該電壓偵測電路521係用於偵測該交流轉交流供電裝置540之直流側603的電壓,以供該太陽能供電裝置520監控該交流轉交流供電裝置540之直流側603的電壓狀況,並產生一偵測電壓準位,其中該另一電力源(例如市電)係藉由該交流轉交流供電裝置540轉為直流電而作用於該交流轉交流供電裝置540之直流側。該電壓轉換電路522耦接該電壓偵測電路521,其係具有一定程度的電壓拉升能力,以拉升該太陽能發電設備510產生的輸出電壓而輸出一轉換電壓,本創作藉此在正常情況下(即當該太陽能發電設備510之輸出功率足以供應該交流電器550之需求時),將該太陽能發電設備510產生的輸出電壓給予拉升至略高於市電經該交流轉交流供電裝置540轉換為直流電(以供變頻)後的電壓準位,因此可由該太陽能發電設備510供電,至於當天候狀況或其他因素造成太陽能發電設備510之輸出功率不足以供應該交流電器550之需求時,則由市電補充做為混合供電之來源,其電路原理於圖6之敘述會再進一步解釋。該整流元件523係設置於該電壓轉換電路522與該交流轉交流供電裝置540之直流側603之間的電力傳輸路徑,於所拉升之該轉換電壓之電壓準位低於該偵測電壓準位時,該整流元件523係中斷該電壓轉換電路522與該交流轉交流供電裝置540之直流側間的電力傳輸路徑,亦即該整流元件523係可作為一自動反應的一截止元件。進一步具體而言,該整流元件523可為一個二極體或多個二極體的串接,該電壓轉換電路522可屬於升壓型(boost)、降壓型(buck)、或升降壓型(boost-buck)電路,取決於使用者之實際需求。Referring to FIG. 5, it is a functional block diagram of a solar power supply device 520 in the first embodiment of the solar power supply system 500 of the present invention, which is used to illustrate the solar power supply device 520 of FIG. An internal configuration, but is not limited to the embodiment shown in FIG. As shown in FIG. 5, the solar power supply device 520 includes a voltage detecting circuit 521, a voltage converting circuit 522, and a rectifying component 523 for detecting the AC-to-AC power supply device 540. The voltage of the DC side 603 is used by the solar power supply device 520 to monitor the voltage status of the DC side 603 of the AC-to-AC power supply device 540, and generate a detection voltage level, wherein the other power source (for example, the utility power) is borrowed. The AC-to-AC power supply device 540 is converted to DC power and acts on the DC side of the AC-to-AC power supply device 540. The voltage conversion circuit 522 is coupled to the voltage detection circuit 521, which has a certain degree of voltage pull-up capability to pull up the output voltage generated by the solar power generation device 510 to output a conversion voltage. When the output power of the solar power generation device 510 is sufficient to supply the AC power supply 550, the output voltage generated by the solar power generation device 510 is pulled up to be slightly higher than the commercial power to be converted by the AC-to-AC power supply device 540. The voltage level after the direct current (for frequency conversion) can be powered by the solar power generation device 510. When the current situation or other factors cause the output power of the solar power generation device 510 to be insufficient to supply the communication device 550, The mains supply is used as a source of hybrid power supply, and its circuit principle is further explained in the description of Figure 6. The rectifying component 523 is disposed between the voltage converting circuit 522 and the DC side 603 of the AC-to-AC power supply device 540. The voltage level of the converted voltage is lower than the detecting voltage. In the case of the bit, the rectifying element 523 interrupts the power transmission path between the voltage converting circuit 522 and the DC side of the AC-AC power supply device 540, that is, the rectifying element 523 can serve as an automatic reacting cut-off element. More specifically, the rectifying element 523 can be a diode or a plurality of diodes connected in series. The voltage converting circuit 522 can be a boost, a buck, or a buck-boost type. (boost-buck) circuit, depending on the actual needs of the user.
請一併參照圖6及圖7,圖6係本創作之混合型太陽能發電系統之第二實施例之示意圖,圖7係本創作之混合型太陽能發電系統之第三實施例之示意圖,圖6及圖7可用於說明交流轉交流供電裝置540為一單相之變頻器或三相之變頻器,但單相之變頻器或三相之變頻器係習知之結構,故不再贅述,欲特別說明者,該交流轉交流供電裝置540可包含一個或多個單流向整流器543,如圖7所示,該交流轉交流供電裝置540之交流側542可包含一單流向整流器543,該單流向整流器543設置在對應該市電電網的一市電電力輸入端531,以將市電(交流電)轉換成直流電,並可據以隔離該太陽能供電裝置520及市電,讓不同電力系統不會相互干擾。此外,並搭配該太陽能供電裝置520之功能,讓該交流轉交流供電裝置540成為一具有再生能源(例如本實施例中太陽能)及市電同時供電之混合電源之節能裝置,亦即,該交流轉交流供電裝置540能適時選擇市電補償的時機,而非像習知之技術般僅提供市電取代。更詳細地說,當太陽能發電設備510之輸出功率足以供應該交流電器550之需求時,該太陽能供電裝置520將太陽能發電設備510之輸出電壓拉升至略高於市電經該單流向整流器543轉換為直流電後的電壓準位,此時該單流向整流器543因二極體原理而不導通,故可完全由太陽能發電設備510供電。再者,當天候狀況或其他因素造成該太陽能發電設備510之輸出功率不足以供應該交流電器550之需求時,雖然該太陽能供電裝置520剛開始仍會將太陽能發電設備510之輸出電壓拉升至略高於市電經該單流向整流器543轉換為直流電後的電壓準位,但隨著輸出電流的增加,該太陽能供電裝置520之輸出電壓最終無法維持在略高於市電經該單流向整流器543轉換為直流電後的電壓準位,而下降至低於該交流轉交流供電裝置之直流側(DC BUS)的電壓,此時該太陽能供電裝置520中的整流元件523因二極體原理而不導通,使該 太陽能發電設備510暫時停止供電,由市電暫時補充,由於太陽能供電裝置520暫時停止供電,此時轉換後之電壓會再度被拉升至略高於市電經該單流向整流器543轉換為直流電後的電壓準位而再次供電,此過程可在極短時間內反覆自然地進行,藉由市電補償該太陽能發電設備510所不足之輸出功率,而達到該太陽能發電設備510與市電混合進行供電的功效而非單一電源完全取代另一電源之供電方式(例如:以電源自動切換開關(ATS)選擇單一電源供應的方式)。此外,當該太陽能發電設備510之輸出功率為零時,該太陽能供電裝置520中的整流元件523因二極體原理而不導通,故該交流轉交流供電裝置540不會將市電之電力回灌至該太陽能發電設備510(即一般所稱之漏電)。Referring to FIG. 6 and FIG. 7 together, FIG. 6 is a schematic diagram of a second embodiment of the hybrid solar power generation system of the present invention, and FIG. 7 is a schematic diagram of a third embodiment of the hybrid solar power generation system of the present invention, FIG. And FIG. 7 can be used to illustrate that the AC-to-AC power supply device 540 is a single-phase inverter or a three-phase inverter, but the single-phase inverter or the three-phase inverter is a conventional structure, so it will not be described again. The AC to AC power supply 540 can include one or more single flow rectifiers 543. As shown in FIG. 7, the AC side 542 of the AC to AC power supply 540 can include a single flow rectifier 543, the single flow rectifier. The 543 is disposed at a mains power input end 531 corresponding to the mains grid to convert the mains (alternating current) into direct current, and the solar power supply device 520 and the mains are isolated to allow different power systems to not interfere with each other. In addition, in conjunction with the function of the solar power supply device 520, the AC-to-AC power supply device 540 is an energy-saving device having a hybrid power source such as a renewable energy source (for example, solar energy in the embodiment) and a commercial power supply at the same time, that is, the AC transfer The AC power supply unit 540 can select the timing of the utility power compensation at the right time instead of providing only the commercial power supply as in the conventional technology. In more detail, when the output power of the solar power generation device 510 is sufficient to supply the demand of the AC electrical device 550, the solar power supply device 520 pulls the output voltage of the solar power generation device 510 to be slightly higher than the commercial power to be converted by the single flow rectifier 543. It is the voltage level after the DC power. At this time, the single-flow rectifier 543 is not turned on due to the diode principle, so it can be completely powered by the solar power generation device 510. Moreover, when the current situation or other factors cause the output power of the solar power generation device 510 to be insufficient to supply the AC electric appliance 550, the solar power supply device 520 will still pull the output voltage of the solar power generation device 510 to the beginning. Slightly higher than the voltage level after the mains is converted to direct current by the single current rectifier 543, but as the output current increases, the output voltage of the solar power supply device 520 cannot be maintained at a slightly higher frequency than the single current to the rectifier 543. The voltage level after the DC power is reduced to a voltage lower than the DC side of the AC-to-AC power supply device. At this time, the rectifying element 523 in the solar power supply device 520 is not turned on due to the diode principle. Make this The solar power generation device 510 temporarily stops the power supply, and is temporarily supplemented by the commercial power. Since the solar power supply device 520 temporarily stops the power supply, the converted voltage is once again pulled up to a voltage slightly higher than the power converted by the commercial power to the direct current rectifier 543 to the direct current. The power is supplied again, and the process can be performed naturally in a very short time. By the utility power compensating for the insufficient output power of the solar power generation device 510, the solar power generation device 510 is mixed with the commercial power to supply power instead of A single power supply completely replaces the power supply of another power supply (for example, the method of selecting a single power supply with an automatic power switch (ATS)). In addition, when the output power of the solar power generation device 510 is zero, the rectifying element 523 in the solar power supply device 520 is not turned on due to the diode principle, so the AC-to-AC power supply device 540 does not recharge the power of the utility power. To the solar power plant 510 (generally referred to as leakage).
圖7之原理與圖6大致相同,僅是將圖6之電路簡單轉用至三相之變頻器,故不再贅述。The principle of FIG. 7 is substantially the same as that of FIG. 6, and only the circuit of FIG. 6 is simply transferred to a three-phase inverter, and therefore will not be described again.
於其他實施例中,該電壓轉換電路522可屬於非隔離型電路、或隔離型電路。該交流轉交流供電裝置540內部可包含一功因修正電路(圖未示),該功因修正電路之輸出即為該交流轉交流供電裝置540之直流側。In other embodiments, the voltage conversion circuit 522 can be a non-isolated circuit, or an isolated circuit. The AC-to-AC power supply device 540 may include a power factor correction circuit (not shown), and the output of the power factor correction circuit is the DC side of the AC-to-AC power supply device 540.
綜合上述,本創作藉由上述之太陽能供電控制器及混合型太陽能發電系統,偵測該交流轉交流供電裝置540之直流側603的電壓,並根據該交流轉交流供電裝置540之直流側603的電壓,轉換該太陽能發電設備510所輸入之電力的電壓至一預設電壓準位,讓該交流轉交流供電裝置540能適時選擇市電補償的時機,以混合再生能源之直流電力及市電之交流電力,因此,本創作無須使用電源自動切換開關(ATS),亦無須將電力多次轉換,進而提供一種讓供電系統自產自用太陽能發電模組產生的電力之高效率之提供交流轉交流供電裝置混合電源之再生能源供電裝置(例如太陽能供電裝置520)。In summary, the present invention detects the voltage of the DC side 603 of the AC-to-AC power supply device 540 by the solar power controller and the hybrid solar power system described above, and according to the DC side 603 of the AC-to-AC power supply device 540. Voltage, converting the voltage of the power input by the solar power generation device 510 to a predetermined voltage level, so that the AC-to-AC power supply device 540 can select the timing of the utility power compensation to mix the DC power of the renewable energy source and the AC power of the city power. Therefore, this creation does not require the use of an automatic power switch (ATS), and does not require multiple conversions of power, thereby providing a high-efficiency supply of AC-to-AC power supply that allows the power supply system to generate electricity from its own solar power module. A renewable energy supply device for the power source (eg, solar powered device 520).
本創作在上文中已以較佳實施例揭露,然熟習本項技術者應理解的是,該實施例僅用於描繪本創作,而不應解讀為限制本創作之範圍。應注意的是,舉凡與該實施例等效之變化與置換,均應設為涵蓋於本創作之範疇內。因此,本創作之保護範圍當以申請專利範圍所界定者為準。The present invention has been disclosed in the above preferred embodiments, and it should be understood by those skilled in the art that the present invention is only intended to depict the present invention and should not be construed as limiting the scope of the present invention. It should be noted that variations and permutations equivalent to those of the embodiments are intended to be included within the scope of the present invention. Therefore, the scope of protection of this creation is subject to the definition of the scope of patent application.
500‧‧‧太陽能供電系統500‧‧‧Solar power supply system
510‧‧‧太陽能發電設備510‧‧‧Solar power equipment
520‧‧‧太陽能供電裝置520‧‧‧Solar power supply
530‧‧‧市電電網530‧‧‧mains grid
540‧‧‧交流轉交流供電裝置540‧‧‧AC to AC power supply
550‧‧‧交流電器550‧‧‧AC appliances
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Cited By (2)
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TWI572107B (en) * | 2015-11-27 | 2017-02-21 | 中華電信股份有限公司 | Power system for muilti-microgrid and control method thereof |
TWI729732B (en) * | 2020-03-13 | 2021-06-01 | 國立高雄科技大學 | Transformerless ac to ac conversion circuit |
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TWI572107B (en) * | 2015-11-27 | 2017-02-21 | 中華電信股份有限公司 | Power system for muilti-microgrid and control method thereof |
TWI729732B (en) * | 2020-03-13 | 2021-06-01 | 國立高雄科技大學 | Transformerless ac to ac conversion circuit |
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