JPH0962386A - Control method for power converter for photovoltatic power generation - Google Patents
Control method for power converter for photovoltatic power generationInfo
- Publication number
- JPH0962386A JPH0962386A JP7220556A JP22055695A JPH0962386A JP H0962386 A JPH0962386 A JP H0962386A JP 7220556 A JP7220556 A JP 7220556A JP 22055695 A JP22055695 A JP 22055695A JP H0962386 A JPH0962386 A JP H0962386A
- Authority
- JP
- Japan
- Prior art keywords
- power
- solar cell
- control
- maximum
- tracking control
- 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.)
- Granted
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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、太陽光発電用電力変換
装置の制御法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a power converter for photovoltaic power generation.
【０００２】[0002]
【従来の技術】太陽電池の出力電力は太陽電池の動作点
によって大きく変わるため、太陽電池の発電電力を有効
に利用するためには、太陽電池の最大電力を与える動作
点を探してそこへ動作点を移動する最大電力追従制御を
行わなければならない。しかし、太陽電池の発電電力は
低日射時にはほぼ平坦となるため、この状態の時に最大
電力追従制御を行ってもかえって非能率となってしま
う。そのため、通常、日射時には最大電力追従制御を停
止するようにしている。従来においては、最大電力追従
制御の開始・停止の判断は太陽電池の出力電圧が設定値
になることを判断して行っていた。2. Description of the Related Art Since the output power of a solar cell varies greatly depending on the operating point of the solar cell, in order to effectively use the generated power of the solar cell, the operating point that gives the maximum power of the solar cell is searched for and operated there. Maximum power tracking control that moves points must be performed. However, since the generated power of the solar cell is almost flat during low solar radiation, even if maximum power tracking control is performed in this state, it becomes rather inefficient. Therefore, normally, the maximum power follow-up control is stopped during solar radiation. In the past, the start / stop of the maximum power tracking control was determined by determining that the output voltage of the solar cell reached the set value.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、太陽電
池の出力電圧で判断する従来の方法では、太陽電池の出
力電圧は太陽電池の温度などによって大きく変化するた
め、最大電力追従制御の開始・停止において誤差が生じ
たり、安定して動作しない等の問題があった。そこで本
発明が解決すべき課題は、太陽電池の最大電力追従制御
の開始・停止を安定かつ確実に行うことにある。However, in the conventional method of determining the output voltage of the solar cell, the output voltage of the solar cell greatly changes depending on the temperature of the solar cell, etc. There were problems such as error and unstable operation. Therefore, the problem to be solved by the present invention is to stably and reliably start and stop the maximum power tracking control of the solar cell.
【０００４】[0004]
【課題を解決するための手段】前記課題を解決するた
め、本発明は、太陽電池の出力電力を電力変換装置を介
して負荷に給電し、前記太陽電池の出力電力が最大にな
るように前記太陽電池の動作点を調節する最大電力追従
制御を行う電力変換装置の制御法において、前記太陽電
池の出力電力が第１の設定値以上になると前記最大電力
追従制御を開始し、前記第１の設定値よりも小さい第２
の設定値以下になると前記最大電力追従制御を停止する
ようにしたものである。In order to solve the above-mentioned problems, the present invention supplies the output power of a solar cell to a load through a power converter so that the output power of the solar cell is maximized. In a control method of a power converter that performs maximum power tracking control for adjusting an operating point of a solar cell, the maximum power tracking control is started when the output power of the solar cell becomes a first set value or more, and the first power tracking control is performed. Second less than the set value
The maximum power tracking control is stopped when the value becomes equal to or less than the set value of.
【０００５】[0005]
【作用】上記手段によって、太陽電池の発電電力を計測
しながら最大電力点追従制御の開始および停止を行い、
太陽電池の温度等の条件によって影響を受けず太陽電池
の発電電力を有効に利用でき、また前記第２の設定値を
第１の設定値よりも小さくすることによって、最大電力
追従制御の開始・停止の繰り返し（ハンチング）を防ぐ
ことができ、安定した制御が可能となる。By the above means, the maximum power point tracking control is started and stopped while measuring the generated power of the solar cell,
The generated power of the solar cell can be effectively used without being affected by conditions such as the temperature of the solar cell, and the maximum power tracking control can be started by setting the second set value smaller than the first set value. Repeated stoppage (hunting) can be prevented and stable control becomes possible.
【０００６】[0006]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図１は本発明の実施例を示す回路図である。図
中、１は太陽電池、２は電力変換装置、３は系統電源と
負荷、４は太陽電池電圧検出回路、５は太陽電池電流検
出回路、６は太陽電池出力電力演算器、７は最大電力追
従制御開始・停止判断回路である。図２は本発明の制御
の手順を示すフローチャートである。次に、本発明実施
例の動作を図２のフローチャートを参照しながら説明す
る。太陽電池１の出力電圧ＶSと出力電流ＩSを図１の太
陽電池電圧検出回路４と太陽電池電流検出回路５で検出
し、太陽電池１の出力電力ＰSを太陽電池出力電力演算
器６で演算する（図２のステップ１１０）。最大電力追
従制御開始・停止判断回路７は第１の設定値で表される
開始電力とこの第１の設定値よりも小さい第２の設定値
で表される停止電力を記憶できるものとし、演算器６が
計算した太陽電池１の発電電力ＰSと開始電力、停止電
力とを比較して（図２のステップ１２０）、発電電力Ｐ
Sが開始電力よりも大きければ最大出力点追従制御の開
始信号を電力変換装置２に送り（図２のステップ１３
０）、発電電力が停止電力よりも小さければ（図２のス
テップ１４０）、最大出力点追従制御の停止信号を電力
変換装置２に送る（図２のステップ１５０）。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing an embodiment of the present invention. In the figure, 1 is a solar cell, 2 is a power converter, 3 is a system power supply and load, 4 is a solar cell voltage detection circuit, 5 is a solar cell current detection circuit, 6 is a solar cell output power calculator, and 7 is maximum power. This is a follow-up control start / stop determination circuit. FIG. 2 is a flowchart showing the control procedure of the present invention. Next, the operation of the embodiment of the present invention will be described with reference to the flowchart of FIG. The output voltage V S and the output current I S of the solar cell 1 are detected by the solar cell voltage detection circuit 4 and the solar cell current detection circuit 5 of FIG. 1, and the output power P S of the solar cell 1 is calculated by the solar cell output power calculator 6 Is calculated (step 110 in FIG. 2). The maximum power tracking control start / stop determination circuit 7 is capable of storing the start power represented by the first set value and the stop power represented by the second set value smaller than the first set value. The generated power P S of the solar cell 1 calculated by the device 6 is compared with the start power and the stop power (step 120 in FIG. 2), and the generated power P
If S is larger than the start power, the start signal of the maximum output point tracking control is sent to the power converter 2 (step 13 in FIG. 2).
0), if the generated power is smaller than the stop power (step 140 in FIG. 2), the stop signal for the maximum output point tracking control is sent to the power converter 2 (step 150 in FIG. 2).
【０００７】電力変換装置２は最大電力追従制御開始・
停止判断回路７から開始信号を受けると最大電力点追従
制御を停止信号を受けるまで続ける。このとき開始電力
（第１の設定値）＞停止電力（第２の設定値）であるの
で、太陽電池出力電力が開始電力と停止電力付近でふら
ついているときでも、開始・停止の状態を繰り返す、い
わゆるハンチングを起こさない。従って、制御上安定し
た動作が可能となる。The power converter 2 starts the maximum power tracking control.
When the start signal is received from the stop determination circuit 7, the maximum power point tracking control is continued until the stop signal is received. At this time, since the start power (first set value)> the stop power (second set value), the start / stop state is repeated even when the solar cell output power fluctuates near the start power and the stop power. , Does not cause so-called hunting. Therefore, stable operation is possible in terms of control.
【０００８】[0008]
【発明の効果】以上述べたように、本発明によれば下記
の効果を奏する。 （１） 太陽電池の最大電力点追従制御の開始・停止を
安定かつ確実に行える。 （２） 発電電力が低い時のハンチングを防止できる。 （３） 以上により、制御回路の安定化と信頼性の向上
を図ることができる。As described above, the present invention has the following effects. (1) The maximum power point tracking control of the solar cell can be started and stopped stably and reliably. (2) Hunting can be prevented when the generated power is low. (3) As described above, it is possible to stabilize the control circuit and improve the reliability.
【図１】 本発明の実施例を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention.
【図２】 本発明の制御の手順を示すフローチャートで
ある。FIG. 2 is a flowchart showing a control procedure of the present invention.
１ 太陽電池、２ 電力変換装置、３ 系統電源と負
荷、４ 太陽電池電圧検出回路、５ 太陽電池電流検出
回路、６ 太陽電池出力電力演算器、７ 最大電力追従
制御開始・停止判断回路1 solar cell, 2 power conversion device, 3 system power supply and load, 4 solar cell voltage detection circuit, 5 solar cell current detection circuit, 6 solar cell output power calculator, 7 maximum power tracking control start / stop determination circuit
Claims (1)
して負荷に給電し、前記太陽電池の出力電力が最大にな
るように前記太陽電池の動作点を調節する最大電力追従
制御を行う電力変換装置の制御法において、前記太陽電
池の出力電力が第１の設定値以上になると前記最大電力
追従制御を開始し、前記第１の設定値よりも小さい第２
の設定値以下になると前記最大電力追従制御を停止する
ことを特徴とする太陽光発電用電力変換装置の制御法。1. A power for supplying maximum output power of a solar cell to a load via a power converter and performing maximum power tracking control for adjusting an operating point of the solar cell so that the output power of the solar cell becomes maximum. In the control method of the conversion device, the maximum power tracking control is started when the output power of the solar cell becomes equal to or higher than a first set value, and the second power smaller than the first set value is set.
The method for controlling a power conversion device for photovoltaic power generation, wherein the maximum power tracking control is stopped when the value becomes equal to or less than a set value of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22055695A JP3553574B2 (en) | 1995-08-29 | 1995-08-29 | Control method of power converter for photovoltaic power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22055695A JP3553574B2 (en) | 1995-08-29 | 1995-08-29 | Control method of power converter for photovoltaic power generation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0962386A true JPH0962386A (en) | 1997-03-07 |
| JP3553574B2 JP3553574B2 (en) | 2004-08-11 |
Family
ID=16752851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22055695A Expired - Lifetime JP3553574B2 (en) | 1995-08-29 | 1995-08-29 | Control method of power converter for photovoltaic power generation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3553574B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008226870A (en) * | 2007-03-08 | 2008-09-25 | Mitsubishi Electric Corp | Solar cell generation system |
| CN102738887A (en) * | 2011-04-11 | 2012-10-17 | 周锡卫 | System and method for intelligently allocating power supply from renewable energy power and grid power |
| JP2012252537A (en) * | 2011-06-03 | 2012-12-20 | Daihen Corp | System-interconnected inverter device |
| WO2013115090A1 (en) | 2012-01-31 | 2013-08-08 | 三洋電機株式会社 | Power conversion device |
| CN103427443A (en) * | 2012-05-14 | 2013-12-04 | 周锡卫 | New energy power generation and supply system based on multi-power intelligent tuner and structure |
| JP2014174876A (en) * | 2013-03-12 | 2014-09-22 | Denso Corp | Electric power system |
| CN104079009A (en) * | 2014-07-14 | 2014-10-01 | 华北电力大学（保定） | Grid connection photovoltaic power direct current electric energy transmission control method |
| CN106230019A (en) * | 2016-08-01 | 2016-12-14 | 芜湖格利特新能源科技有限公司 | A kind of distributed photovoltaic micro-grid system of long-range control |
-
1995
- 1995-08-29 JP JP22055695A patent/JP3553574B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008226870A (en) * | 2007-03-08 | 2008-09-25 | Mitsubishi Electric Corp | Solar cell generation system |
| JP4489087B2 (en) * | 2007-03-08 | 2010-06-23 | 三菱電機株式会社 | Solar power system |
| CN102738887A (en) * | 2011-04-11 | 2012-10-17 | 周锡卫 | System and method for intelligently allocating power supply from renewable energy power and grid power |
| JP2012252537A (en) * | 2011-06-03 | 2012-12-20 | Daihen Corp | System-interconnected inverter device |
| WO2013115090A1 (en) | 2012-01-31 | 2013-08-08 | 三洋電機株式会社 | Power conversion device |
| CN103427443A (en) * | 2012-05-14 | 2013-12-04 | 周锡卫 | New energy power generation and supply system based on multi-power intelligent tuner and structure |
| JP2014174876A (en) * | 2013-03-12 | 2014-09-22 | Denso Corp | Electric power system |
| CN104079009A (en) * | 2014-07-14 | 2014-10-01 | 华北电力大学（保定） | Grid connection photovoltaic power direct current electric energy transmission control method |
| CN106230019A (en) * | 2016-08-01 | 2016-12-14 | 芜湖格利特新能源科技有限公司 | A kind of distributed photovoltaic micro-grid system of long-range control |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3553574B2 (en) | 2004-08-11 |
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