JP3541982B2 - System overvoltage protection method and device for photovoltaic power converter - Google Patents
System overvoltage protection method and device for photovoltaic power converter Download PDFInfo
- Publication number
- JP3541982B2 JP3541982B2 JP11834695A JP11834695A JP3541982B2 JP 3541982 B2 JP3541982 B2 JP 3541982B2 JP 11834695 A JP11834695 A JP 11834695A JP 11834695 A JP11834695 A JP 11834695A JP 3541982 B2 JP3541982 B2 JP 3541982B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- point
- solar cell
- set value
- maximum power
- 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 - Lifetime
Links
Images
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
Description
【０００１】
【産業上の利用分野】
本発明は、太陽光発電用電力変換装置の系統過電圧保護方法及び装置に関する。
【０００２】
【従来の技術】
太陽光発電用電力変換装置と系統電源との連系において、電力変換装置 (インバータ) から送電される電力が大きくなるか、柱上変圧器から電力変換装置までの配電線が長くインピーダンスが大きい場合、電力変換装置と系統とが接続されている連系点電圧が配電線の逆起電力によって上昇し、連系点につながる家電設備等の負荷に悪影響を及ぼす恐れがある。
従来、このような連系点の過電圧を抑えるために、まず電力変換装置の出力電流を電圧に対して進相させて電圧上昇を抑制し、次に電力変換装置出力力率が規定値になっても電圧上昇が抑制されない場合には、電力変換装置の出力電流を減少させることで連系点電圧の過電圧を抑制していた（分散型電源系統連系技術指針 ＪＥＡＧ ９７０１−１９９３）。
【０００３】
【発明が解決しようとする課題】
連系点電圧を電力変換装置の出力電流を減少させて抑制するには、電力変換装置を太陽電池の最大電力点追従制御から、連系点の電圧上昇を抑制する連系点電圧抑制制御に切り換えなければならない。このとき、太陽電池の出力電力は減少し、太陽電池の動作点は図２のように最大電力点（Ａ）から電力の小さい２ケ所（Ｂ，Ｃ）のうちどちらかに移動する。また連系点電圧抑制制御の状態で、太陽電池の動作点が最大電力点（Ａ）になれば連系点電圧制御から最大電力点追従制御へ切り換えなければならない。しかし、最大電力点（Ａ）は日射量や太陽電池温度によって変化し、最大電力点追従制御を行っていない状態では、太陽電池の最大電力点（Ａ）がどこにあるかは不明なため、連系点電圧抑制制御を終了して最大電力点追従制御に移行する条件を効率よく検出できないといった問題があった。本発明が解決すべき課題は、連系点電圧が設定値以上に上昇した場合の電力変換装置の連系点電圧の調整および連系点電圧調整の終了を簡単に判断できる方法及び装置を提供することにある。
【０００４】
【課題を解決するための手段】
前記課題を解決するため、本発明の太陽光発電用電力変換装置の系統過電圧保護方法は、太陽電池の出力を交流電力に変換し、電力系統に連系する電力変換装置において、前記太陽電池の動作点を変動させ最大電力点を追従する最大電力点追従制御を行う最大電力点追従制御回路と、前記電力系統の連系点電圧を検出する検出器を設け、前記連系点電圧が第１の設定値電圧以上になったときに、前記最大電力点追従制御回路の前記最大電力点追従制御を停止し、太陽電池動作点指令電圧を固定し、前記連系点電圧が前記第１の設定値電圧以上の第２の設定値より高ければ増加、前記第２の設定値より低ければ減少させるような零以上の値をもつ補正電圧と前記固定された太陽電池動作点指令電圧との和または差をとったものを新たな太陽電池動作指令電圧として前記電力変換装置に与え、前記連系点電圧を前記第２の設定値に維持するように制御し、前記補正電圧が零になったときに、前記連系電圧を前記第２の設定値に維持する制御を停止し、前記最大電力点追従制御回路の前記太陽電池動作点指令電圧の固定を解除し、前記最大電力点追従制御を再開して、前記連係点電圧の過電圧を抑制するものである。
【０００５】
【作用】
上記手段によって電力変換装置と系統との連系点電圧を監視することにより、連系点電圧が設定値以上に上昇した場合の電力変換装置の連系点電圧の調整および連系点電圧調整の終了を簡単に判断できる。
【０００６】
【実施例】
以下、本発明の実施例を図に基づいて説明する。
図１は本発明の実施例の制御ブロック図、図２は太陽電池動作点の移動を示した説明図である。
図中、１は電力変換装置、２は太陽電池、３は連系点電圧を検出するトランス、４および５は基準電圧発生器、６は最大電力点追従指令電圧発生器、７は補正電圧発生器である。
回路構成は従来の電力変換装置１と、基準電圧発生器５と、補正電圧発生器７と、最大電力点追従指令電圧発生器６と、基準電圧発生器４から構成され、基準電圧発生器５と補正電圧発生器７は連系点電圧Ｖe ＝Ｖ2 に制御する回路であり、補正電圧発生器７は太陽電池２の動作電圧（または動作電流）を増加または減少のどちらか一方にしか補正できないものとする。
【０００７】
具体的な動作として、図１および図２を用いて説明する。ここで、電力変換装置１は最大電力点追従指令発生器６の出力する太陽電池動作点電圧指令電圧Ｖs と補正電圧発生器７の発生電圧との和に応じて太陽電池２の動作点電圧を制御するものとする。連系点電圧Ｖe が第１の基準電圧発生器４によって設定された第１の設定値Ｖ1 を超えると最大電力点追従指令電圧発生器６は太陽電池２の最大電力点追従制御を停止して、Ｖs はそのときの値に固定する。更に連系点電圧が第２の基準電圧発生器５によって設定された第２の設定値Ｖ2 （≧Ｖ1 ）を超えると、Ｖs に補正電圧を加える。この補正電圧は、（Ｖe −Ｖ2 ）＞０のとき増加、（Ｖe −Ｖ2 ）＜０のとき減少、（Ｖe −Ｖ2 ）＝０のとき固定として、補正電圧が負にならないように制限する。
太陽電池２の最大電力点追従制御を停止したときの動作電圧は、ほぼ最大電力点付近であり、この点を図２のＡとする。連系点電圧がＶ2 よりも上昇すると補正電圧発生器７が正の補正電圧を出力し始め、太陽電池２の動作点電圧は上昇する。そして、太陽電池出力電力が減少して電力変換装置１の出力電流も減少することで連系点電圧も減少する。連系点電圧がＶ2 になると補正電圧の上昇は止まり（このときの太陽電池の動作点をＢとする）、太陽電池２の動作点はＢ付近に落ち着き、連系点電圧がＶe ＝Ｖ2 になるように電力変換装置１は制御される。
【０００８】
日射量の低下による太陽電池２の出力電力の低下や電力系統側の負荷変動によって、連系点電圧が低下し、補正電圧発生器７の補正電圧が減少して零となったら、最大電力点追従指令電圧発生器６はこれを検出して太陽電池２の最大電力点追従制御を再開する。
前記補正電圧発生器７の補正電圧とＶs との差を取るかまたは補正電圧発生器７の電圧の発生方法を逆転しても、この回路は同様に電圧を抑制できる。しかし、この場合は太陽電池の動作点がＣ側へと移動するので、Ｂ側に移動するのに比べて太陽電池出力電流が増加しロスが増える。
また前記第１実施例では第１の基準電圧発生器４、第２の基準電圧発生器５、最大電力点追従指令電圧発生器６、補正電圧発生器７と具体的な回路で説明したが、これらを電力変換装置１に内蔵された制御回路のソフトウエアで実現してもよい。
【０００９】
【発明の効果】
以上述べたように、本発明によれば従来方式に比べ、下記の効果を奏する。
▲１▼ 連系点電圧上昇を簡単な制御回路の付加によって抑制できる。
▲２▼ 電圧抑制制御中に太陽電池の最大電力点を調べる必要がない。
▲３▼ 以上により、電力変換装置、制御の簡略化ができ、コストを抑えることができる。
【図面の簡単な説明】
【図１】本発明の実施例の制御ブロック図である。
【図２】太陽電池動作点の移動を示した説明図である。
【符号の説明】
１ 電力変換装置、２ 太陽電池、３ トランス、４ 第１の基準電圧発生器、５ 第２の基準電圧発生器、６ 最大電力点追従指令電圧発生器、７ 補正電圧発生器[0001]
[Industrial applications]
The present invention relates to a system overvoltage protection method and device for a photovoltaic power conversion device.
[0002]
[Prior art]
When the power transmitted from the power converter (inverter) is large or the distribution line from the pole transformer to the power converter is long and has high impedance in the interconnection between the power converter for photovoltaic power generation and the system power supply In addition, the voltage at the interconnection point where the power conversion device and the system are connected may rise due to the back electromotive force of the distribution line, which may adversely affect the load of the home electric appliance or the like connected to the interconnection point.
Conventionally, in order to suppress such an overvoltage at the interconnection point, first, the output current of the power converter is advanced with respect to the voltage to suppress the voltage rise, and then the output power factor of the power converter becomes a specified value. Even if the voltage rise is not suppressed, the overcurrent of the interconnection point voltage is suppressed by reducing the output current of the power converter (distributed power supply system interconnection technical guideline JEAG 9701-1993).
[0003]
[Problems to be solved by the invention]
In order to suppress the interconnection point voltage by reducing the output current of the power converter, the power converter is switched from the maximum power point tracking control of the solar cell to the interconnection point voltage suppression control that suppresses the voltage rise at the interconnection point. I have to switch. At this time, the output power of the solar cell decreases, and the operating point of the solar cell moves from the maximum power point (A) to one of two places (B, C) where the power is small as shown in FIG. If the operating point of the solar cell reaches the maximum power point (A) in the state of the interconnection point voltage suppression control, it is necessary to switch from the interconnection point voltage control to the maximum power point tracking control. However, the maximum power point (A) varies depending on the amount of solar radiation and the temperature of the solar cell, and in a state where the maximum power point tracking control is not performed, it is unknown where the maximum power point (A) of the solar cell is. There is a problem that the condition for terminating the system point voltage suppression control and shifting to the maximum power point tracking control cannot be detected efficiently. The problem to be solved by the present invention is to provide a method and a device that can easily determine the adjustment of the interconnection point voltage of the power conversion device and the end of the interconnection point voltage adjustment when the interconnection point voltage rises above a set value. Is to do.
[0004]
[Means for Solving the Problems]
In order to solve the above problem, a system overvoltage protection method for a power converter for photovoltaic power generation of the present invention converts an output of a solar cell into AC power, and in a power converter connected to a power system, A maximum power point tracking control circuit for performing a maximum power point tracking control for varying an operating point and following a maximum power point, and a detector for detecting a connection point voltage of the power system; When the voltage becomes equal to or higher than the set value voltage, the maximum power point tracking control of the maximum power point tracking control circuit is stopped, a solar cell operating point command voltage is fixed, and the interconnection point voltage is set to the first setting. The sum of the correction voltage having a value of zero or more and the fixed solar cell operating point command voltage, which increases when the voltage is higher than a second set value equal to or higher than the value voltage and decreases when the voltage is lower than the second set value, or New solar cell with difference The operation voltage is supplied to the power converter as a working command voltage, and the connection point voltage is controlled to be maintained at the second set value. When the correction voltage becomes zero, the connection voltage is changed to the second connection value. Stop the control to maintain the set value of, release the fixation of the solar cell operating point command voltage of the maximum power point tracking control circuit, restart the maximum power point tracking control, the overvoltage of the link point voltage It is to suppress.
[0005]
[Action]
By monitoring the interconnection point voltage between the power converter and the system by the above means, it is possible to adjust the interconnection point voltage of the power converter and to adjust the interconnection point voltage when the interconnection point voltage rises above a set value. The end can be easily determined.
[0006]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a control block diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing movement of a solar cell operating point.
In the figure, 1 is a power converter, 2 is a solar cell, 3 is a transformer for detecting a connection point voltage, 4 and 5 are reference voltage generators, 6 is a maximum power point tracking command voltage generator, and 7 is a correction voltage generator. It is a vessel.
The circuit configuration includes a conventional power converter 1, a reference voltage generator 5, a correction voltage generator 7, a maximum power point tracking command voltage generator 6, and a reference voltage generator 4. And the correction voltage generator 7 are circuits for controlling the connection point voltage to Ve = V2, and the correction voltage generator 7 can correct the operating voltage (or operating current) of the solar cell 2 only to either increase or decrease. Shall be.
[0007]
A specific operation will be described with reference to FIGS. Here, the power converter 1 changes the operating point voltage of the solar cell 2 according to the sum of the solar cell operating point voltage command voltage Vs output from the maximum power point tracking command generator 6 and the voltage generated by the correction voltage generator 7. Shall be controlled. When the interconnection point voltage Ve exceeds the first set value V1 set by the first reference voltage generator 4, the maximum power point tracking command voltage generator 6 stops the maximum power point tracking control of the solar cell 2 and , Vs are fixed at the values at that time. Further, when the interconnection point voltage exceeds the second set value V2 (≥V1) set by the second reference voltage generator 5, a correction voltage is added to Vs. The correction voltage is increased when (Ve-V2)> 0, decreased when (Ve-V2) <0, and fixed when (Ve-V2) = 0, so that the correction voltage is not negative.
The operating voltage when the maximum power point tracking control of the solar cell 2 is stopped is approximately near the maximum power point, and this point is denoted by A in FIG. When the interconnection point voltage rises above V2, the correction voltage generator 7 starts outputting a positive correction voltage, and the operating point voltage of the solar cell 2 rises. Then, as the output power of the solar cell decreases and the output current of the power converter 1 also decreases, the interconnection point voltage also decreases. When the interconnection point voltage becomes V2, the correction voltage stops increasing (the operating point of the solar cell at this time is B), the operating point of the solar cell 2 is settled near B, and the interconnection point voltage becomes Ve = V2. The power conversion device 1 is controlled so as to be as follows.
[0008]
If the interconnection point voltage decreases due to a decrease in the output power of the solar cell 2 due to a decrease in the amount of solar radiation or a load change on the power system side, and the correction voltage of the correction voltage generator 7 decreases to zero, the maximum power point The tracking command voltage generator 6 detects this and restarts the maximum power point tracking control of the solar cell 2.
Even if the difference between the correction voltage of the correction voltage generator 7 and Vs is taken or the method of generating the voltage of the correction voltage generator 7 is reversed, this circuit can similarly suppress the voltage. However, in this case, since the operating point of the solar cell moves to the C side, the output current of the solar cell increases and the loss increases compared to moving to the B side.
In the first embodiment, the first reference voltage generator 4, the second reference voltage generator 5, the maximum power point tracking command voltage generator 6, and the correction voltage generator 7 have been described with specific circuits. These may be realized by software of a control circuit built in the power conversion device 1.
[0009]
【The invention's effect】
As described above, according to the present invention, the following effects are obtained as compared with the conventional system.
{Circle around (1)} An increase in the interconnection point voltage can be suppressed by adding a simple control circuit.
(2) It is not necessary to check the maximum power point of the solar cell during the voltage suppression control.
{Circle around (3)} As described above, the power converter and control can be simplified, and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a control block diagram of an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing movement of a solar cell operating point.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Power conversion device, 2 Solar cell, 3 Transformers, 4 First reference voltage generator, 5 Second reference voltage generator, 6 Maximum power point tracking command voltage generator, 7 Correction voltage generator
Claims (2)
前記連系点電圧が第１の設定値電圧以上になったときに、
前記最大電力点追従制御回路の前記最大電力点追従制御を停止し、太陽電池動作点指令電圧を固定し、前記連系点電圧が前記第１の設定値電圧以上の第２の設定値より高ければ増加、前記第２の設定値より低ければ減少させるような零以上の値をもつ補正電圧と前記固定された太陽電池動作点指令電圧との和または差をとったものを新たな太陽電池動作指令電圧として前記電力変換装置に与え、前記連系点電圧を前記第２の設定値に維持するように制御し、
前記補正電圧が零になったときに、
前記連系電圧を前記第２の設定値に維持する制御を停止し、前記最大電力点追従制御回路の前記太陽電池動作点指令電圧の固定を解除し、前記最大電力点追従制御を再開して、
前記連系点電圧の過電圧を抑制することを特徴とする太陽光発電用電力変換装置の系統の電圧保護方法。A power converter that converts the output of a solar cell into AC power and interconnects with a power system, wherein a maximum power point tracking control circuit that performs a maximum power point tracking control that varies the operating point of the solar cell and tracks a maximum power point And a detector for detecting an interconnection point voltage of the power system,
When the interconnection point voltage becomes equal to or higher than a first set value voltage,
The maximum power point tracking control of the maximum power point tracking control circuit is stopped, a solar cell operating point command voltage is fixed, and the interconnection point voltage is higher than a second set value equal to or higher than the first set value voltage. The sum or difference between the correction voltage having a value equal to or greater than zero and increasing or decreasing the value if the value is lower than the second set value and the fixed solar cell operating point command voltage is used as a new solar cell operation. Giving to the power converter as a command voltage, controlling the connection point voltage to be maintained at the second set value,
When the correction voltage becomes zero,
Stop the control to maintain the interconnection voltage at the second set value, release the fixing of the solar cell operating point command voltage of the maximum power point tracking control circuit, resume the maximum power point tracking control ,
A voltage protection method for a system of a power converter for photovoltaic power generation, wherein an overvoltage of the interconnection point voltage is suppressed.
前記電力系統の連系点電圧を検出する検出器と、A detector for detecting an interconnection point voltage of the power system,
前記連系点電圧が第１の設定値電圧以上になったときに、前記最大電力点追従制御を停止し、太陽電池動作点指令電圧を固定し、前記連系点電圧が前記第１の設定値電圧以上の第２の設定値より高ければ増加、前記第２の設定値より低ければ減少させるような零以上の値をもつ補正電圧と前記固定された太陽電池動作点指令電圧との和または差をとったものを新たな太陽電池動作指令電圧として前記電力変換装置に与え、前記連系点電圧を前記第２の設定値に維持するように制御し、前記補正電圧が零になったときに、前記連系電圧を前記第２の設定値に維持する制御を停止し、前記太陽電池動作点指令電圧の固定を解除し、前記最大電力点追従制御を再開して、前記連系点電圧の過電圧を抑制する制御装置と When the interconnection point voltage becomes equal to or higher than a first set value voltage, the maximum power point tracking control is stopped, a solar cell operating point command voltage is fixed, and the interconnection point voltage is set to the first set value. The sum of the correction voltage having a value of zero or more and the fixed solar cell operating point command voltage, which increases when the voltage is higher than a second set value equal to or higher than the value voltage and decreases when the voltage is lower than the second set value, or The difference is given to the power converter as a new solar cell operation command voltage, and the connection point voltage is controlled to be maintained at the second set value, and when the correction voltage becomes zero. Stopping the control for maintaining the interconnection voltage at the second set value, releasing the fixation of the solar cell operating point command voltage, resuming the maximum power point tracking control, and resuming the interconnection point voltage. Control device to suppress overvoltage of
を備えたことを特徴とする太陽光発電用電力変換装置の系統過電圧保護装置。A system overvoltage protection device for a power converter for photovoltaic power generation, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11834695A JP3541982B2 (en) | 1995-05-17 | 1995-05-17 | System overvoltage protection method and device for photovoltaic power converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11834695A JP3541982B2 (en) | 1995-05-17 | 1995-05-17 | System overvoltage protection method and device for photovoltaic power converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08317664A JPH08317664A (en) | 1996-11-29 |
| JP3541982B2 true JP3541982B2 (en) | 2004-07-14 |
Family
ID=14734426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11834695A Expired - Lifetime JP3541982B2 (en) | 1995-05-17 | 1995-05-17 | System overvoltage protection method and device for photovoltaic power converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3541982B2 (en) |
Families Citing this family (60)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE602004023497D1 (en) | 2003-05-06 | 2009-11-19 | Enecsys Ltd | POWER SUPPLY CIRCUITS |
| US8067855B2 (en) | 2003-05-06 | 2011-11-29 | Enecsys Limited | Power supply circuits |
| JP2005312138A (en) * | 2004-04-19 | 2005-11-04 | Canon Inc | Power controller, power generation system and power system |
| GB2415841B (en) | 2004-11-08 | 2006-05-10 | Enecsys Ltd | Power conditioning unit |
| US11881814B2 (en) | 2005-12-05 | 2024-01-23 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
| US10693415B2 (en) | 2007-12-05 | 2020-06-23 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
| US8405367B2 (en) | 2006-01-13 | 2013-03-26 | Enecsys Limited | Power conditioning units |
| GB2454389B (en) | 2006-01-13 | 2009-08-26 | Enecsys Ltd | Power conditioning unit |
| US8947194B2 (en) | 2009-05-26 | 2015-02-03 | Solaredge Technologies Ltd. | Theft detection and prevention in a power generation system |
| US11569659B2 (en) | 2006-12-06 | 2023-01-31 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
| US11888387B2 (en) | 2006-12-06 | 2024-01-30 | Solaredge Technologies Ltd. | Safety mechanisms, wake up and shutdown methods in distributed power installations |
| US8618692B2 (en) | 2007-12-04 | 2013-12-31 | Solaredge Technologies Ltd. | Distributed power system using direct current power sources |
| US11728768B2 (en) | 2006-12-06 | 2023-08-15 | Solaredge Technologies Ltd. | Pairing of components in a direct current distributed power generation system |
| US8319483B2 (en) | 2007-08-06 | 2012-11-27 | Solaredge Technologies Ltd. | Digital average input current control in power converter |
| US9130401B2 (en) | 2006-12-06 | 2015-09-08 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
| US8963369B2 (en) | 2007-12-04 | 2015-02-24 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
| US11687112B2 (en) | 2006-12-06 | 2023-06-27 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
| US11296650B2 (en) | 2006-12-06 | 2022-04-05 | Solaredge Technologies Ltd. | System and method for protection during inverter shutdown in distributed power installations |
| US11855231B2 (en) | 2006-12-06 | 2023-12-26 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
| US9112379B2 (en) | 2006-12-06 | 2015-08-18 | Solaredge Technologies Ltd. | Pairing of components in a direct current distributed power generation system |
| US8319471B2 (en) | 2006-12-06 | 2012-11-27 | Solaredge, Ltd. | Battery power delivery module |
| US9088178B2 (en) | 2006-12-06 | 2015-07-21 | Solaredge Technologies Ltd | Distributed power harvesting systems using DC power sources |
| US8473250B2 (en) | 2006-12-06 | 2013-06-25 | Solaredge, Ltd. | Monitoring of distributed power harvesting systems using DC power sources |
| US8384243B2 (en) | 2007-12-04 | 2013-02-26 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
| US11309832B2 (en) | 2006-12-06 | 2022-04-19 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
| US11735910B2 (en) | 2006-12-06 | 2023-08-22 | Solaredge Technologies Ltd. | Distributed power system using direct current power sources |
| US8816535B2 (en) | 2007-10-10 | 2014-08-26 | Solaredge Technologies, Ltd. | System and method for protection during inverter shutdown in distributed power installations |
| US8013472B2 (en) | 2006-12-06 | 2011-09-06 | Solaredge, Ltd. | Method for distributed power harvesting using DC power sources |
| US11264947B2 (en) | 2007-12-05 | 2022-03-01 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
| JP2011507465A (en) | 2007-12-05 | 2011-03-03 | ソラレッジ テクノロジーズ リミテッド | Safety mechanism, wake-up method and shutdown method in distributed power installation |
| WO2009072076A2 (en) | 2007-12-05 | 2009-06-11 | Solaredge Technologies Ltd. | Current sensing on a mosfet |
| US8289742B2 (en) | 2007-12-05 | 2012-10-16 | Solaredge Ltd. | Parallel connected inverters |
| WO2009072075A2 (en) | 2007-12-05 | 2009-06-11 | Solaredge Technologies Ltd. | Photovoltaic system power tracking method |
| WO2009118683A2 (en) | 2008-03-24 | 2009-10-01 | Solaredge Technolgies Ltd. | Zero voltage switching |
| EP3719949A1 (en) | 2008-05-05 | 2020-10-07 | Solaredge Technologies Ltd. | Direct current power combiner |
| GB2482653B (en) | 2010-06-07 | 2012-08-29 | Enecsys Ltd | Solar photovoltaic systems |
| US10230310B2 (en) | 2016-04-05 | 2019-03-12 | Solaredge Technologies Ltd | Safety switch for photovoltaic systems |
| GB2485527B (en) | 2010-11-09 | 2012-12-19 | Solaredge Technologies Ltd | Arc detection and prevention in a power generation system |
| US10673222B2 (en) | 2010-11-09 | 2020-06-02 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
| US10673229B2 (en) | 2010-11-09 | 2020-06-02 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
| GB2486408A (en) | 2010-12-09 | 2012-06-20 | Solaredge Technologies Ltd | Disconnection of a string carrying direct current |
| GB2496140B (en) | 2011-11-01 | 2016-05-04 | Solarcity Corp | Photovoltaic power conditioning units |
| GB2483317B (en) | 2011-01-12 | 2012-08-22 | Solaredge Technologies Ltd | Serially connected inverters |
| JP5829053B2 (en) * | 2011-06-03 | 2015-12-09 | 株式会社ダイヘン | Grid-connected inverter device |
| US8570005B2 (en) | 2011-09-12 | 2013-10-29 | Solaredge Technologies Ltd. | Direct current link circuit |
| GB2496139B (en) | 2011-11-01 | 2016-05-04 | Solarcity Corp | Photovoltaic power conditioning units |
| GB2498365A (en) | 2012-01-11 | 2013-07-17 | Solaredge Technologies Ltd | Photovoltaic module |
| GB2498790A (en) | 2012-01-30 | 2013-07-31 | Solaredge Technologies Ltd | Maximising power in a photovoltaic distributed power system |
| GB2498791A (en) | 2012-01-30 | 2013-07-31 | Solaredge Technologies Ltd | Photovoltaic panel circuitry |
| US9853565B2 (en) | 2012-01-30 | 2017-12-26 | Solaredge Technologies Ltd. | Maximized power in a photovoltaic distributed power system |
| JP5886658B2 (en) * | 2012-03-02 | 2016-03-16 | 京セラ株式会社 | Control device and control method |
| GB2499991A (en) | 2012-03-05 | 2013-09-11 | Solaredge Technologies Ltd | DC link circuit for photovoltaic array |
| US10115841B2 (en) | 2012-06-04 | 2018-10-30 | Solaredge Technologies Ltd. | Integrated photovoltaic panel circuitry |
| JP5869999B2 (en) * | 2012-09-19 | 2016-02-24 | 株式会社Ｎｔｔドコモ | Solar power system |
| US9941813B2 (en) | 2013-03-14 | 2018-04-10 | Solaredge Technologies Ltd. | High frequency multi-level inverter |
| US9548619B2 (en) | 2013-03-14 | 2017-01-17 | Solaredge Technologies Ltd. | Method and apparatus for storing and depleting energy |
| EP3506370B1 (en) | 2013-03-15 | 2023-12-20 | Solaredge Technologies Ltd. | Bypass mechanism |
| US9318974B2 (en) | 2014-03-26 | 2016-04-19 | Solaredge Technologies Ltd. | Multi-level inverter with flying capacitor topology |
| US11177663B2 (en) | 2016-04-05 | 2021-11-16 | Solaredge Technologies Ltd. | Chain of power devices |
| US11018623B2 (en) | 2016-04-05 | 2021-05-25 | Solaredge Technologies Ltd. | Safety switch for photovoltaic systems |
-
1995
- 1995-05-17 JP JP11834695A patent/JP3541982B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08317664A (en) | 1996-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3541982B2 (en) | System overvoltage protection method and device for photovoltaic power converter | |
| JP2002165357A (en) | Power converter and its control method, and power generating system | |
| JP2002204531A (en) | Ac-interconnecting device and control method thereof | |
| JP2004517598A (en) | Uninterruptible power system | |
| US10270332B2 (en) | Overload current limiting method for voltage source converter | |
| KR20110026500A (en) | Low voltage ride through | |
| WO2017019359A1 (en) | Redundant residential power sources | |
| JP2005269843A (en) | Parallel operation device | |
| JP3407234B2 (en) | Control method of distributed arrangement type power supply linked to power system | |
| JPH08314555A (en) | Power converter for solar power generation | |
| CN112152183B (en) | Method for operating a converter and converter arrangement | |
| JP2004357390A (en) | Power supply device including system interconnection inverter | |
| JP4258452B2 (en) | Power conditioner control device, power conditioner control method, and cogeneration system | |
| JP6894866B2 (en) | Power control system, power control device, and power control method | |
| JP3499942B2 (en) | Solar power generator | |
| JPH11122820A (en) | Solar light generator | |
| CN111049410B (en) | Control method of electric energy conversion device and electric energy conversion system | |
| US7233081B2 (en) | Power-supply device | |
| JP2011139594A (en) | System interconnection system | |
| JPH07163056A (en) | Electric power supply system | |
| JP2001333536A (en) | Non-utility generating facility | |
| CN114825367A (en) | Control method for islanding operation of flexible direct current transmission system | |
| JP2708246B2 (en) | Control device for self-excited power converter | |
| CN115589026B (en) | Power supply system and grid-connected/disconnected switching method of energy storage converter | |
| JP2001218368A (en) | Power converter and photovoltaic generation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20031216 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20031219 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20040216 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20040312 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20040325 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090409 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090409 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100409 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100409 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110409 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120409 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120409 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130409 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140409 Year of fee payment: 10 |
|
| EXPY | Cancellation because of completion of term |