JPH08166827A - Power supply unit - Google Patents
Power supply unitInfo
- Publication number
- JPH08166827A JPH08166827A JP6310205A JP31020594A JPH08166827A JP H08166827 A JPH08166827 A JP H08166827A JP 6310205 A JP6310205 A JP 6310205A JP 31020594 A JP31020594 A JP 31020594A JP H08166827 A JPH08166827 A JP H08166827A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- solar cell
- reactor
- inverter
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Control Of Electrical Variables (AREA)
- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、太陽電池発電力の高効
率化，ノイズ低減効果が図れる電源供給装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device capable of achieving high efficiency of solar cell power generation and noise reduction.
【０００２】[0002]
【従来の技術】従来、太陽光発電等により得られた直流
電力をインバータ等の変換装置を介して交流電力に変換
する装置として、特開昭58−69469 号公報がある。同公
報には、図２に示される太陽電池の電圧(Ｖｓ)−電流
(Ｉｓ)特性（実線）、および電力特性（破線）から図中
のＰ点に示す最大動作点で太陽電池が動作できるように
インバータのパルス幅制御を行い、交流電力を出力する
ようにしている。2. Description of the Related Art Conventionally, there is JP-A-58-69469 as a device for converting DC power obtained by solar power generation or the like into AC power via a converter such as an inverter. In this publication, the voltage (Vs) -current of the solar cell shown in FIG.
From the (Is) characteristic (solid line) and the power characteristic (broken line), the pulse width of the inverter is controlled so that the solar cell can operate at the maximum operating point indicated by point P in the figure, and AC power is output. .
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来技術では
太陽電池が最大動作点で動作するようにインバータのパ
ルス幅制御を行っても、下述するような理由よりインバ
ータ入力側電流の脈動によってコンデンサの電圧値が変
動するために、太陽電池の動作点が図２中の破線で示す
電力特性カーブ上の矢印で示すように最大電力点を外
れ、効率が低下してしまう。また、インバータの内部素
子のスイッチングによって、スイッチング周波数の電圧
変動が漏れ出て、太陽電池とコンデンサを含む閉回路が
アンテナ的な役割を果たしてノイズが発生し、ＴＶやラ
ジオ等の電子機器に悪影響を与えてしまう。また、イン
バータ入力側電流の脈動の影響をコンデンサだけで吸収
しようとすれば、かなり大容量のコンデンサが必要とな
り、装置の小型化に支障をきたす。However, according to the prior art, even if the pulse width control of the inverter is performed so that the solar cell operates at the maximum operating point, the capacitor is changed by the pulsation of the inverter input side current for the reason described below. Since the voltage value of 1 fluctuates, the operating point of the solar cell deviates from the maximum power point as shown by the arrow on the power characteristic curve shown by the broken line in FIG. 2, and the efficiency decreases. Also, due to the switching of the internal elements of the inverter, the voltage fluctuation of the switching frequency leaks out, and the closed circuit including the solar cell and the capacitor acts as an antenna to generate noise, which adversely affects electronic devices such as TVs and radios. Will give. Further, if it is attempted to absorb the influence of the pulsation of the current on the input side of the inverter only by the capacitor, a capacitor having a considerably large capacity is required, which hinders downsizing of the device.
【０００４】本発明の目的は、高効率で低ノイズ化が図
れる、太陽電池を用いた電源供給装置を提供することに
ある。An object of the present invention is to provide a power supply device using a solar cell, which can achieve high efficiency and low noise.
【０００５】[0005]
【課題を解決するための手段】本発明の目的は、太陽電
池と，太陽電池の正極または負極あるいは両極端子にリ
アクトルを介して接続されたコンデンサと，コンデンサ
の両端に接続され直流電圧を交流電圧に変換するインバ
ータとからなる太陽電池を用いた電源供給装置によって
達成される。An object of the present invention is to provide a solar cell, a capacitor connected to a positive electrode, a negative electrode or both terminals of the solar cell via a reactor, and a DC voltage connected across both ends of the capacitor to an AC voltage. This is achieved by a power supply device using a solar cell, which is composed of an inverter for converting into.
【０００６】[0006]
【作用】太陽電池と直列に接続されたリアクトルによっ
て、インバータの入力側の脈動する電流によって引き起
こされるコンデンサの電圧変動の太陽電池への影響が抑
制できる。これにより太陽電池の電力特性における極大
点での電力振動を抑制できるため、太陽電池の最大動作
点でのインバータによる交流出力が行え高効率化が図れ
る。さらにインバータの内部素子のスイッチングによっ
て引き起こされるスイッチング周波数の電圧変動の太陽
電池への影響を抑制できるので、前記部から発生するノ
イズが低減する。The reactor connected in series with the solar cell can suppress the influence on the solar cell of the voltage fluctuation of the capacitor caused by the pulsating current on the input side of the inverter. As a result, the power oscillation at the maximum point in the power characteristics of the solar cell can be suppressed, so that AC output can be performed by the inverter at the maximum operating point of the solar cell, and high efficiency can be achieved. Furthermore, since it is possible to suppress the influence of the voltage fluctuation of the switching frequency, which is caused by the switching of the internal elements of the inverter, on the solar cell, the noise generated from the section is reduced.
【０００７】[0007]
【実施例】先ず発明が生まれる経緯を説明する。インバ
ータのように直流を交流に変換する変換器では、変換の
際にスイッチング素子を用いて図３（ａ）に示す交流電
圧を出力している。この時、変換器の入力側の電流は変
換器入出力の電力授受の関係より図３（ｂ）に示す脈動
電流が流れる。その影響で太陽電池と並列に接続された
コンデンサの電圧が図４に示すように変動する。なお、
この変動の大きさはコンデンサの容量を大きくすれば小
さくできるが、低周波を平滑しようとすると非常に大き
な容量のコンデンサが必要となり、装置の小型化に支障
をきたす。太陽電池の電圧は、コンデンサの電圧変動に
よって図２のΔＶに示すように変動し、太陽電池が最大
電力点で動作するようにインバータのパルス幅を制御し
ても、このようなコンデンサの電圧値の変動のために、
太陽電池の動作点が図２の矢印で示すように最大電力点
を外れ、効率が低下してしまう。この場合の太陽電池の
発生電力は図５の実線に示す通りである。また、インバ
ータの内部素子のスイッチングによってスイッチング周
波数の電圧変動を生じ、太陽電池とコンデンサを含む閉
回路がアンテナ的な役割をはたしてノイズが発生し、Ｔ
Ｖやラジオ等の電子機器に悪影響を与えてしまう。EXAMPLES First, the background of how the invention was born will be described. In a converter such as an inverter that converts direct current into alternating current, a switching element is used during conversion to output the alternating voltage shown in FIG. At this time, the pulsating current shown in FIG. 3B flows in the current on the input side of the converter due to the relation of power exchange between the converter input and output. As a result, the voltage of the capacitor connected in parallel with the solar cell fluctuates as shown in FIG. In addition,
The magnitude of this fluctuation can be reduced by increasing the capacitance of the capacitor, but an attempt to smooth low frequencies requires a capacitor with a very large capacitance, which hinders miniaturization of the device. The voltage of the solar cell fluctuates as indicated by ΔV in Fig. 2 due to the voltage fluctuation of the capacitor, and even if the pulse width of the inverter is controlled so that the solar cell operates at the maximum power point, the voltage value of such a capacitor Due to fluctuations in
The operating point of the solar cell deviates from the maximum power point as shown by the arrow in FIG. 2, and the efficiency decreases. The power generated by the solar cell in this case is as shown by the solid line in FIG. Further, switching of the internal elements of the inverter causes a voltage fluctuation of the switching frequency, and the closed circuit including the solar cell and the capacitor plays a role of an antenna to generate noise,
Electronic devices such as Vs and radios are adversely affected.
【０００８】図１は本発明の一実施例における太陽電池
を用いた電源供給装置の回路図である。太陽電池１とコ
ンデンサ２をリアクトル６を介して並列に接続し、コン
デンサ２の両端の直流電力を交流電力に変換するインバ
ータ３に負荷４，商用電源系統５がそれぞれ並列に接続
され所定の給電システムを構成している。本実施例の従
来と異なるところは、太陽電池１とコンデンサ２をリア
クトル６を介して接続した点にある。FIG. 1 is a circuit diagram of a power supply device using a solar cell according to an embodiment of the present invention. A solar cell 1 and a capacitor 2 are connected in parallel via a reactor 6, and a load 4 and a commercial power supply system 5 are connected in parallel to an inverter 3 that converts DC power at both ends of the capacitor 2 into AC power. Are configured. The difference of the present embodiment from the conventional one is that the solar cell 1 and the capacitor 2 are connected via a reactor 6.
【０００９】リアクトルは電圧変動に対して逆起電力を
生じ、電圧変動を平滑化することができる。このリアク
トルの効果により、図４で示すコンデンサの電圧変動の
太陽電池への影響を低減できる。太陽電池の電圧変動が
低減されれば、図２で示すΔＶが低減し、より効率の良
い動作点で動作でき、図５の破線に示すように効率が向
上する。また、このようにコンデンサの電圧変動をリア
クトルによって抑えられるので、大容量のコンデンサを
設けることなく太陽電池の電圧変動を抑えることがで
き、効率よく動作させることができる。また、ノイズの
発生を最小限に抑えるためには、図１における太陽電池
１からみてＡ点にできるだけ近く配置することが望まし
い。The reactor produces a counter electromotive force with respect to the voltage fluctuation, and can smooth the voltage fluctuation. The effect of this reactor can reduce the influence of the voltage fluctuation of the capacitor shown in FIG. 4 on the solar cell. If the voltage fluctuation of the solar cell is reduced, ΔV shown in FIG. 2 is reduced, the operation can be performed at a more efficient operating point, and the efficiency is improved as shown by the broken line in FIG. Further, since the voltage fluctuation of the capacitor can be suppressed by the reactor as described above, the voltage fluctuation of the solar cell can be suppressed without providing a large-capacity capacitor, and the operation can be efficiently performed. Further, in order to minimize the generation of noise, it is desirable to dispose the solar cell 1 as close as possible to the point A when viewed from the solar cell 1 in FIG.
【００１０】さらに、太陽電池の電圧変動を抑えること
ができるリアクトルのインダクタンスＬとコンデンサの
容量Ｃは数１に示すＬ，Ｃの範囲のものが有効である。
インバータ入力側電流波形は図３（ｂ）に示す通りであ
るが、この影響でコンデンサの電圧が図４に示すように
変動する。この時のコンデンサの電圧変動の周波数はイ
ンバータ出力交流周波数の２倍周波数に一致する。従っ
て、Ｌ，Ｃの共振周波数がインバータ出力交流周波数の
２倍周波数よりも小さい場合、つまり数１に示す範囲の
Ｌ，Ｃを用いることによって太陽電池の電圧変動を抑制
できる。また、インバータから漏れ出るスイッチング周
波数の電圧変動によって、太陽電池，リアクトル，コン
デンサを含む回路からノイズが発生する。このノイズ発
生を抑えるためには、Ｌ，Ｃの共振周波数がスイッチン
グ周波数よりも小さい場合、つまり数２に示す範囲の
Ｌ，Ｃを用いることによって、スイッチング周波数の電
圧変動によるノイズの発生を抑制できる。Furthermore, it is effective that the inductance L of the reactor and the capacitance C of the capacitor capable of suppressing the voltage fluctuation of the solar cell are in the range of L and C shown in the equation (1).
The current waveform on the input side of the inverter is as shown in FIG. 3B, but due to this influence, the voltage of the capacitor fluctuates as shown in FIG. The frequency of the voltage fluctuation of the capacitor at this time matches the double frequency of the inverter output AC frequency. Therefore, when the resonant frequencies of L and C are smaller than the double frequency of the inverter output AC frequency, that is, by using L and C in the range shown in Formula 1, the voltage fluctuation of the solar cell can be suppressed. Further, due to the voltage fluctuation of the switching frequency leaking from the inverter, noise is generated from the circuit including the solar cell, the reactor and the capacitor. In order to suppress the noise generation, when the resonance frequencies of L and C are lower than the switching frequency, that is, by using L and C in the range shown in Formula 2, the noise generation due to the voltage fluctuation of the switching frequency can be suppressed. .
【００１１】[0011]
【発明の効果】本発明によれば、太陽電池と直列に接続
されたリアクトルによって、インバータの入力側の脈動
電流によって引き起こされるコンデンサの電圧変動の太
陽電池への影響を抑制できる。従って、図２で示すよう
な太陽電池の電圧変動ΔＶを低減でき、太陽電池の最大
電力点により近い点での動作が可能となる。またこのよ
うなインバータ入力側のチョップした脈動電流の影響を
コンデンサだけで吸収するためにはかなりの容量のコン
デンサが必要となるが、リアクトルを設けることにより
コンデンサを大容量化する事なく太陽電池を効率よく動
作させることができる。またさらに、図１で示す太陽電
池とリアクトルとコンデンサを含む閉回路全体の電圧変
動を抑えることとなり、前記部からのノイズの発生を抑
えることができる。このことによりＴＶ，ラジオの受信
やその他の電子機器等への悪影響を抑えることができ
る。According to the present invention, the reactor connected in series with the solar cell can suppress the influence on the solar cell of the voltage fluctuation of the capacitor caused by the pulsating current on the input side of the inverter. Therefore, the voltage fluctuation ΔV of the solar cell as shown in FIG. 2 can be reduced, and the operation at a point closer to the maximum power point of the solar cell becomes possible. Also, in order to absorb the influence of such chopped pulsating current on the input side of the inverter only with the capacitor, a capacitor with a considerable capacity is required, but by installing a reactor the solar cell can be used without increasing the capacity of the capacitor. It can be operated efficiently. Furthermore, the voltage fluctuation of the entire closed circuit including the solar cell, the reactor, and the capacitor shown in FIG. 1 is suppressed, so that the generation of noise from the above portion can be suppressed. As a result, reception of TV, radio, and other adverse effects on electronic devices can be suppressed.
【図１】本発明の実施例の太陽電池を用いた電源供給装
置の回路図。FIG. 1 is a circuit diagram of a power supply device using a solar cell according to an embodiment of the present invention.
【図２】太陽電池の特性図。FIG. 2 is a characteristic diagram of a solar cell.
【図３】インバータ入出力側における電圧，電流の波形
図。FIG. 3 is a waveform diagram of voltage and current on the input / output side of the inverter.
【図４】コンデンサの電圧波形図。FIG. 4 is a voltage waveform diagram of a capacitor.
【図５】太陽電池の電力波形図。FIG. 5 is a power waveform diagram of a solar cell.
１…太陽電池、２…コンデンサ、３…インバータ等の変
換装置、４…負荷、５…商用電源系統、６…リアクト
ル。DESCRIPTION OF SYMBOLS 1 ... Solar cell, 2 ... Capacitor, 3 ... Converters, such as an inverter, 4 ... Load, 5 ... Commercial power supply system, 6 ... Reactor.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 柳川 薫 茨城県日立市大みか町七丁目１番１号 株 式会社日立製作所日立研究所内 (72)発明者 奥沢 勝広 茨城県日立市大みか町七丁目１番１号 株 式会社日立製作所日立研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kaoru Yanagawa, 1-1 1-1 Omika-cho, Hitachi-shi, Ibaraki Hitachi, Ltd. Hitachi Research Laboratory (72) Inventor Katsuhiro Okusawa 7-chome, Omika-cho, Hitachi-shi, Ibaraki No. 1 Hitachi Ltd. Hitachi Research Laboratory
Claims (4)
極あるいは両極端子にリアクトルを介して接続されたコ
ンデンサと，前記コンデンサの両端に接続され直流電圧
を交流電圧に変換するインバータとからなることを特徴
とする電源供給装置。1. A solar cell, a solar cell, a capacitor connected to a positive electrode, a negative electrode, or both terminals of the solar cell via a reactor, and an inverter connected to both ends of the capacitor for converting a DC voltage into an AC voltage. Power supply device characterized by.
電池の電圧変動を抑制するのに要する大きさを備える電
源供給装置。2. The power supply device according to claim 1, wherein the reactor has a size required to suppress voltage fluctuation of the solar cell.
ダクタンスＬ，前記コンデンサの容量Ｃ，前記交流電圧
の周波数ｆとの間に数１に示す関係が成り立つ太陽電池
を用いた電源供給装置。 【数１】 3. The power supply device according to claim 1, wherein the inductance L of the reactor, the capacitance C of the capacitor, and the frequency f of the AC voltage satisfy the relationship shown in Formula 1. [Equation 1]
ダクタンスＬ，前記コンデンサの容量Ｃ，前記インバー
タのスイッチング周波数ｆC との間に数２に示す関係が
成り立つ太陽電池を用いた電源供給装置。 【数２】 4. A power supply device using a solar cell according to claim 1, wherein the inductance L of the reactor, the capacitance C of the capacitor, and the switching frequency f C of the inverter are satisfied. [Equation 2]
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6310205A JPH08166827A (en) | 1994-12-14 | 1994-12-14 | Power supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6310205A JPH08166827A (en) | 1994-12-14 | 1994-12-14 | Power supply unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08166827A true JPH08166827A (en) | 1996-06-25 |
Family
ID=18002457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6310205A Pending JPH08166827A (en) | 1994-12-14 | 1994-12-14 | Power supply unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08166827A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010252535A (en) * | 2009-04-16 | 2010-11-04 | Nissan Motor Co Ltd | Power conversion apparatus |
-
1994
- 1994-12-14 JP JP6310205A patent/JPH08166827A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010252535A (en) * | 2009-04-16 | 2010-11-04 | Nissan Motor Co Ltd | Power conversion apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8614901B2 (en) | Inverter employing a boost chopper circuit and a resonant converter circuit | |
| US6175219B1 (en) | Booster type converter with low power loss | |
| US6104624A (en) | System connecting device | |
| US8299747B2 (en) | Single-stage zero-current switching driving circuit for ultrasonic motor | |
| US8120936B2 (en) | DC-to-AC power converting device | |
| JPS5889075A (en) | Resonance type switching power source | |
| KR20150046823A (en) | Power supply apparatus and driving method thereof | |
| US4790980A (en) | Device for the generation of ozone and a process for its operation | |
| CN111224538A (en) | On-chip isolating switch power supply | |
| US10186985B1 (en) | Isolated FAI 2 converter with clamped voltage rectifier and synchronous rectified solution | |
| CN110048520A (en) | Primary side has the wireless charging device of C-LCC compensation network | |
| Chuang et al. | Battery float charge technique using parallel-loaded resonant converter for discontinuous conduction operation | |
| WO2024087873A1 (en) | Oscillation wave generation circuit and construction method | |
| JPH07123717A (en) | Switching power unit | |
| US4706252A (en) | Laser device of AC discharge excitation type | |
| US8107269B2 (en) | Power converter | |
| US5706184A (en) | Resonant converter with a resonant circuit employing the leakage inductance and distributed capacitance of a transformer | |
| JPH08166827A (en) | Power supply unit | |
| KR100999228B1 (en) | Boost converter with high voltage gain | |
| US7057375B2 (en) | Power factor correction | |
| JP3152298B2 (en) | High voltage power circuit | |
| JP2003259644A (en) | Switching converter circuit | |
| CN216490257U (en) | Power adapter circuit and power adapter | |
| CN111726017A (en) | Switch power supply | |
| TWI253201B (en) | High-efficiency fuel cell power conditioning mechanism with high-order resonant framework as well as closed-loop control |