JPS6140152B2 - - Google Patents
Info
- Publication number
- JPS6140152B2 JPS6140152B2 JP54168218A JP16821879A JPS6140152B2 JP S6140152 B2 JPS6140152 B2 JP S6140152B2 JP 54168218 A JP54168218 A JP 54168218A JP 16821879 A JP16821879 A JP 16821879A JP S6140152 B2 JPS6140152 B2 JP S6140152B2
- Authority
- JP
- Japan
- Prior art keywords
- solar cell
- inverter
- voltage
- present
- diode
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/95—Circuit arrangements
- H10F77/953—Circuit arrangements for devices having potential barriers
- H10F77/955—Circuit arrangements for devices having potential barriers for photovoltaic devices
-
- 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
Landscapes
- Photovoltaic Devices (AREA)
Description
【発明の詳細な説明】
この発明は、太陽電池の保護装置に関し、一層
詳細には、太陽電池に他励インバータ、自励イン
バータ等の変換装置を接続し且つこの変換装置を
逆起電力を含む負荷若しくは他の電源系統に接続
して所望の電力を供給する太陽電池電源装置にお
いて、変換装置の故障等に起因する過電流が太陽
電池に流入することを阻止する太陽電池の保護装
置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a protection device for a solar cell, and more particularly, the present invention relates to a protection device for a solar cell, and more particularly, a solar cell is connected to a converting device such as a separately excited inverter or a self-exciting inverter, and the converting device includes a back electromotive force. The present invention relates to a solar battery protection device that prevents overcurrent from flowing into the solar battery due to a failure of a converter, etc. in a solar battery power supply device that connects to a load or other power supply system to supply desired power.
太陽電池は半永久的な発電効果が期待でき、ま
た特に消耗品も必要としないために近年とみにそ
の開発度合が著しい。この種の太陽電池セルは、
一般に単体での起電々圧が非常に低いので複数個
直列に接続して所望の電力を取り出し、これを順
バイアス方向に接続されたインバータ等の変換装
置に導入して所定の交流電力を負荷側に供給して
いる。ところで、前述のように太陽電池セルが相
互に直列に接続されていると、そのうちのいずれ
か一つが損傷することによつて求める電力が全く
得られなくなつてしまう不都合がある。例えば、
インバータの出力側に逆起電力を含む負荷や他の
電源系統が接続されている回路の場合、インバー
タ直流入力端子電圧は正常時には太陽電池の電圧
に対抗する極性にあるのに対して、インバータが
転流失敗等を起こして故障すると、太陽電池の電
圧と順極性直列接続関数になる。その結果、前記
インバータ電圧と太陽電池セルとの電圧が加算さ
れることになるために回路に過大な電流が流れ、
太陽電池セルの過熱を惹起し、ひいては損壊の原
因となる難点があつた。 Solar cells can be expected to have a semi-permanent power generation effect and do not require any consumables, so their development has been remarkable in recent years. This kind of solar cell is
Generally, the electromotive voltage of a single unit is very low, so connect multiple units in series to extract the desired power, and introduce this into a conversion device such as an inverter connected in the forward bias direction to transfer the specified AC power to the load side. is supplied to. However, if the solar cells are connected in series as described above, there is a problem in that if any one of them is damaged, the desired power cannot be obtained at all. for example,
In the case of a circuit in which a load containing a back electromotive force or other power supply system is connected to the output side of the inverter, the inverter DC input terminal voltage normally has a polarity that opposes the voltage of the solar cell, but the inverter If a failure occurs due to commutation failure, etc., the voltage becomes a function of the solar cell voltage and the forward polarity series connection. As a result, the inverter voltage and the voltage of the solar cell are added together, causing an excessive current to flow through the circuit.
The problem was that it caused overheating of the solar cells, which could lead to damage.
本発明の目的は、インバータを介して逆起電力
を含む負荷もしくは他の電源系統に電力を供給す
る太陽電池において、インバータの故障によつて
生じる過電流から太陽電池を保護するため簡単な
手段を提供するにある。 An object of the present invention is to provide a simple means for protecting a solar cell from overcurrent caused by an inverter failure in a solar cell that supplies power to a load containing a back electromotive force or to another power supply system via an inverter. It is on offer.
前記の目的を達成するため、本発明において
は、インバータを介して逆起電力を含む負荷若し
くは他の電源系統に電力を供給する太陽電池にお
いて、前記太陽電池に並列にダイオードをそのダ
イオードにとつて太陽電池の起電力極性が阻止方
向になるように接続することを特徴とする。 In order to achieve the above object, in the present invention, in a solar cell that supplies power to a load containing a back electromotive force or other power supply system via an inverter, a diode is connected in parallel to the solar cell. The solar cell is characterized by being connected so that the electromotive force polarity of the solar cell is in the blocking direction.
本発明の他の目的および利点は、以下の詳細な
説明から一層明らかとなるであろう。 Other objects and advantages of the present invention will become more apparent from the detailed description below.
次に、本発明に係る太陽電池の保護装置につい
て好適な実施例を挙げ、添付図面を参照しながら
以下詳細に説明する。 Next, preferred embodiments of the solar cell protection device according to the present invention will be described in detail with reference to the accompanying drawings.
第１図において、参照符号１０は、複数の直列
に接続されたセルからなる太陽電池を示し、この
太陽電池１０は、例えば直流リアクトルを備え公
知の他励インバータ１２を介して電源に電力を融
通する。参照符号１６は系統電源１４に接続され
ている負荷である。前記太陽電池１０と他励イン
バータ１２との間にダイオード１８が並列接続さ
れている。 In FIG. 1, reference numeral 10 indicates a solar cell consisting of a plurality of cells connected in series, and this solar cell 10 is equipped with, for example, a DC reactor, and receives power from a power source via a publicly known separately excited inverter 12. do. Reference numeral 16 is a load connected to the grid power supply 14. A diode 18 is connected in parallel between the solar cell 10 and the separately excited inverter 12.
通常運転状態では太陽電池１０の電圧は図示の
とおりダイオード１８を阻止状態にする極性にあ
り、従つて、太陽電池１０からの電流は、矢印Ａ
方向にのみ流れて他励インバータ１２に流入し、
交流電力に変換されて系統１４に供給される。こ
のときインバータ直流側電圧は第１図に示すとお
り太陽電池１０の電圧に対抗する向きの極性にあ
る。ところが、他励インバータ１２が何らかの原
因によつて転流失敗等を起こすと、他励インバー
タ１２の電圧極性は反転するに至る。このために
直流回路電流（太陽電池に流れる電流）が急上昇
する。このため太陽電池では内部インピーダンス
による電圧降下が大きくなり、太陽電池端子電圧
Ｖは低下する。この端子電圧Ｖは第２図の太陽電
池の電圧電流特性図からわかるように、電流がＩ
がIoに到達したとき零になる。電流Ｉはさらにイ
ンバータ直流電圧によりさらにIoよりも大きくな
り得る。Ｉ＞Ioとなると太陽電池では起電力より
も内部インピーダンス降下が上回る結果、太陽電
池端子電圧Ｖは第１図の極性とは逆の極性にな
る。太陽電池端子電圧Ｖが逆極になるや否やダイ
オード１８が導通する。この結果、太陽電池電流
ＩはIo近傍に制限され、インバータ側から供給さ
れる電流のIoを越えた分はダイオード１８を介し
てバイパスされる。インバータは限流抵抗の挿入
あるいはしや断器のトリツプなどの公知の保護手
段によつて過電流から保護されるが、本発明によ
つてダイオード１８を付加したことによつてイン
バータ保護手段が作動するまでに既に太陽電池に
とつて許容できないような過電流が生じるという
ことを確実に防止することができる。 In normal operating conditions, the voltage across the solar cell 10 is of a polarity that causes the diode 18 to block as shown, and therefore the current from the solar cell 10 is directed by the arrow A.
flows only in the direction and flows into the separately excited inverter 12,
It is converted into AC power and supplied to the grid 14. At this time, the inverter DC side voltage has a polarity opposite to the voltage of the solar cell 10, as shown in FIG. However, if the separately excited inverter 12 causes commutation failure or the like for some reason, the voltage polarity of the separately excited inverter 12 ends up being reversed. For this reason, the DC circuit current (current flowing through the solar cells) increases rapidly. Therefore, in the solar cell, the voltage drop due to internal impedance increases, and the solar cell terminal voltage V decreases. As can be seen from the voltage-current characteristics diagram of the solar cell in Figure 2, this terminal voltage V is
becomes zero when it reaches Io. The current I can also be larger than Io due to the inverter DC voltage. When I>Io, the internal impedance drop exceeds the electromotive force in the solar cell, and as a result, the solar cell terminal voltage V has a polarity opposite to that shown in FIG. As soon as the solar cell terminal voltage V becomes of opposite polarity, the diode 18 becomes conductive. As a result, the solar cell current I is limited to near Io, and the portion of the current supplied from the inverter that exceeds Io is bypassed via the diode 18. Although the inverter is protected from overcurrent by known protection means such as inserting a current limiting resistor or tripping a circuit breaker, the addition of the diode 18 according to the present invention activates the inverter protection means. It is possible to reliably prevent an overcurrent that is already unacceptable to the solar cell from occurring.
本発明によれば、極めて簡単に太陽電池への過
電流の流入阻止が図られ、従つて太陽電池自体の
保護と太陽電池を電源とする装置の信頼性を一層
向上することができる。 According to the present invention, it is possible to very easily prevent overcurrent from flowing into the solar cell, thereby further improving the protection of the solar cell itself and the reliability of a device using the solar cell as a power source.
以上、本発明について好適な実施例を挙げて説
明したが、本発明はこの実施例に限定されるもの
ではなく、本発明の精神を逸脱しない範囲で種々
の改良並びに設計変更が可能なことは勿論であ
る。 Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and design changes can be made without departing from the spirit of the present invention. Of course.
第１図は本発明の実施例の電気回路図であり、
第２図は第１図における太陽電池の電圧−電流特
性曲線図である。
１０……太陽電池、１２……他励インバータ
（変換器）、１４……電源ライン、１６……負荷、
１８……ダイオード。
FIG. 1 is an electrical circuit diagram of an embodiment of the present invention,
FIG. 2 is a voltage-current characteristic curve diagram of the solar cell in FIG. 1. 10...Solar cell, 12...Separately excited inverter (converter), 14...Power line, 16...Load,
18...Diode.
Claims (1)
くは他の電源系統に給電する太陽電池において、
前記太陽電池に並列にダイオードを、太陽電池の
起電力極性がそのダイオードにとつて阻止方向に
なるように接続したことを特徴とする太陽電池の
保護装置。1 In a solar cell that supplies power to a load containing a back electromotive force or other power supply system via an inverter,
A protection device for a solar cell, characterized in that a diode is connected in parallel to the solar cell so that the polarity of the electromotive force of the solar cell is in a blocking direction for the diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16821879A JPS5691483A (en) | 1979-12-26 | 1979-12-26 | Solar battery protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16821879A JPS5691483A (en) | 1979-12-26 | 1979-12-26 | Solar battery protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5691483A JPS5691483A (en) | 1981-07-24 |
| JPS6140152B2 true JPS6140152B2 (en) | 1986-09-08 |
Family
ID=15863971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16821879A Granted JPS5691483A (en) | 1979-12-26 | 1979-12-26 | Solar battery protector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5691483A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1519587A (en) * | 1974-07-31 | 1978-08-02 | Heathcoat & Co Ltd | Bulked yarn |
| JPS5814711Y2 (en) * | 1978-03-27 | 1983-03-24 | 三菱電機株式会社 | Protection device for power converter equipment |
-
1979
- 1979-12-26 JP JP16821879A patent/JPS5691483A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5691483A (en) | 1981-07-24 |
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