JPS63178734A - Solar generating system - Google Patents
Solar generating systemInfo
- Publication number
- JPS63178734A JPS63178734A JP601787A JP601787A JPS63178734A JP S63178734 A JPS63178734 A JP S63178734A JP 601787 A JP601787 A JP 601787A JP 601787 A JP601787 A JP 601787A JP S63178734 A JPS63178734 A JP S63178734A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- power
- battery
- output
- load
- 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
- 238000010248 power generation Methods 0.000 claims description 6
- 230000011664 signaling Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は太陽光発電システムに係り、特にＤＥＧ（ディ
ーゼル発電機）との並列運転を行なうハイブリッド構成
の太陽光発電システ１１に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a solar power generation system, and particularly to a solar power generation system 11 with a hybrid configuration that operates in parallel with a DEG (diesel generator).
従来、太陽光発電装置とＤＥＣを併用したハイブリッド
構成の太陽光発電システムについては、例えば電気学会
研究会資料半導体電力変換研究会５ＰＣ−８５−８６（
１，９８５年１１月１５０）１０１〜１１０頁に記載の
ように併用方式としては、第２図に示すようにＤＣ並列
方式を採用し、不日照継続時の補助やバッテリー過放電
時の急速充電としてＤ ＥＧを利用している。Conventionally, regarding a solar power generation system with a hybrid configuration that uses both a solar power generation device and a DEC, for example, the Institute of Electrical Engineers of Japan Study Group Material Semiconductor Power Conversion Study Group 5PC-85-86 (
November 1,985 150) As described on pages 101 to 110, the DC parallel method is adopted as shown in Figure 2, and is used to provide assistance during continued periods of lack of sunlight and rapid charging when the battery is over-discharged. We are using DEG as a.
しかしながら従来の方式では、不日照継続時、あるいは
、バッテリー過放電時に運転するＤ Ｅ Ｇの出力は、
充電器を介し、バッテリーに蓄えられ、さらにインバー
タで交流電力に変換され負荷に供給されるため、効率が
低下するという問題があった。一方ＡＣ並列方式の場合
、］−） Ｅ Ｇはインバータ出力電圧との位相差、電
圧差を検出しインバータ出力に同期をとって併入する同
期併入機能を備えるため、ＤＥＧは高価となってしまう
問題があった。ＤＥＧを運転後は、ＤＥＧ出力は最大で
も負荷電力となるためＤＥＧを高効率で運転できる。However, in the conventional method, the output of the DEG that operates when there is no sunshine or when the battery is over-discharged is
Since the AC power is stored in the battery via the charger, converted into AC power by the inverter, and then supplied to the load, there is a problem in that efficiency decreases. On the other hand, in the case of the AC parallel system, the DEG is expensive because it has a synchronous addition function that detects the phase difference and voltage difference with the inverter output voltage and adds it to the inverter output in synchronization. There was a problem with it. After the DEG is operated, the DEG output becomes the load power at the maximum, so the DEG can be operated with high efficiency.
またバッテリーの充電は太陽電池からだけのためバッテ
リーの充電に時間がかかりＤＥＧの運転時間が長くなる
という問題があった。さらにＤＥＧ運転時にインバータ
出力を変化させると本ハイブリッドシステムでは、ＤＥ
Ｇ容量とインバータ容量が同程度の容量であるためイン
バータ出力の変動でＤＥＧ出力が大幅に変動しＤＥＧを
安定に運転できないという問題があった。In addition, since the battery is charged only from the solar cell, there is a problem in that it takes time to charge the battery, which increases the operating time of the DEG. Furthermore, if the inverter output is changed during DEG operation, in this hybrid system, DE
Since the G capacity and the inverter capacity are approximately the same, there is a problem in that the DEG output fluctuates significantly due to fluctuations in the inverter output, making it impossible to stably operate the DEG.
、本発明の目的は、インバータにＤＥＧとの同期゛ｆ人
機能を設けると共に、ＤＥＧの出力を１００％に制御す
る機能を備え、Ｄ Ｅ Ｇを高効率で安定に運転するを
可能とし、ＡＣ並列運転方式を低コストで可能とし、か
つシステムを高効率で安定に運転することを可能とする
ことにある。The purpose of the present invention is to provide an inverter with a synchronization function with the DEG and a function to control the output of the DEG to 100%, so that the DEG can be operated stably with high efficiency. The objective is to enable parallel operation at low cost and to operate the system stably with high efficiency.
本発明は第１図に示すように太陽光発電装置とＤＥＧの
併用方式をＡＣ並列方式にすると共にＤＥＧ出力又は、
負荷電力の信号をインバータに与え、インバータにＤＥ
Ｃを一定出力で運転させるように制御する機能を備える
ことによりＤ Ｅ Ｇを高出力で運転させると共トこイ
ンバータへのＤＥＧの並列同期併入においては、インバ
ータ始動時はＤ ＥＧの位相差、電力差を制御部分に取
込み同期併入することが容易にできることを考慮し、イ
ンバータに負荷電力を供給した状態で同期をとる機能を
追加して同期併入を行うことで目的を達成するものであ
る。As shown in FIG.
Give the load power signal to the inverter and DE to the inverter.
By providing a function to control the DEG to operate at a constant output, the DEG can be operated at a high output.When the DEG is connected to the inverter in parallel and synchronously, the phase difference between the DEG and the DEG can be controlled when the inverter is started. Considering that the power difference can be easily taken into the control part and synchronously added, the purpose is achieved by adding a function to synchronize while supplying load power to the inverter and performing synchronously adding. It is.
すなわち本発明によるインバータはＤＥＧ又は負荷電力
信号によりＤ Ｅ Ｇを高出方で運転することができる
。例えばインバータ出力電力を−（Ｄ Ｅ Ｇ−負荷電
力）に設定するとインバータは位相角をおくれ方向に制
御して充電器として運転し、余剰電力を蓄電池に充電す
る。それに伴い、Ｄ Ｅ Ｇは出カ一定で運転し、高効
率、高安定度の運転が可能となる。又インバー・りへの
ＤＥＧの同期併入においては、インバータが同期併入機
能を持つためにインバータにおいて負荷に電力を供給し
た状態でＤＥＧの電圧とインバータ出力電圧との位相差
、電圧差を取り一致するように周波数を変調させ、電気
を制御したのち、同期併入するためＤＥＧが特殊な同期
併入機能を有せずにかつ無停電で同期が可能となる。That is, the inverter according to the present invention can operate the DEG at a high output level based on the DEG or load power signal. For example, when the inverter output power is set to -(DEG-load power), the inverter controls the phase angle in the backward direction, operates as a charger, and charges the storage battery with surplus power. Accordingly, the DEG operates with a constant output, allowing highly efficient and highly stable operation. In addition, when DEG is added to an inverter synchronously, since the inverter has a synchronous addition function, the phase difference and voltage difference between the DEG voltage and the inverter output voltage are taken into consideration while the inverter is supplying power to the load. After the frequencies are modulated so that they match and the electricity is controlled, synchronization is performed, so the DEG does not have a special synchronization function and synchronization can be performed without power outage.
以下、本発明の一実施例を第１図により説明する。太陽
電池１とバッテリー４は逆流防止ダイオード２とバッテ
リー制御装置３を介して接続される。バッテリー４は、
通常すえ置型鉛蓄電池を用いる。バッテリー制御装置３
では、例えばバッテリーの端子電圧を型詰し過充電、適
正充電、過放電に応じた電圧値を検出することによりバ
ッテリーの充電状態を監視し、その入出力を制御する。An embodiment of the present invention will be described below with reference to FIG. The solar cell 1 and the battery 4 are connected via a backflow prevention diode 2 and a battery control device 3. Battery 4 is
Usually a stand-alone lead acid battery is used. Battery control device 3
For example, the charging state of the battery is monitored by measuring the terminal voltage of the battery and detecting voltage values corresponding to overcharging, proper charging, and overdischarging, and controlling its input/output.
インバータ５は、太陽電池で発電された直流電力を交流
に変換し負荷１０に電力を供給する。本インバータは変
換回路１１とその他制御回路等から構成されており電圧
型自励式のため電圧１周波数を制御することができる。The inverter 5 converts DC power generated by the solar cells into AC power and supplies the AC power to the load 10 . This inverter is composed of a conversion circuit 11 and other control circuits, and is of a voltage type self-excitation type, so that it is possible to control the voltage and frequency.
次にインバータの出力側にＳＷＩ （８）、ＤＥＧの出
力側にＳＷ２ （９）、 を設はインバータとＤＥＧと
の交流側での並列接続を可能とする。インバータのみで
負荷に電力を供給する時はＳＷＩオン、ＳＷ２オフとし
、一定周波、一定電圧で運転している。ここでバッテリ
ーが過放電になった時は最初、ＤＥＧを起動し定格周波
数、電圧とする。次にインバータの制御装置で負荷に電
力を供給している状態で、インバータの周波数ｆｏをＤ
ＥＧの周波数ｆに一致させたのちインバータとＤＥＧの
出力電圧の位相差を検出し、ＤＥＧの電力位相にインバ
ータの位相が一節するように周波数を変調させ、さらに
電圧もＤＥＧ出力電圧に等しくなるようにインバータの
電圧の調整を行ない同期併入を行なう。その後負荷電力
の検出信号によりインバータは、−（ＤＥＧ定格定格−
カー負荷電力力設定値として定電力制御に切りかえる。Next, SWI (8) is installed on the output side of the inverter, and SW2 (9) is installed on the output side of the DEG to enable parallel connection of the inverter and DEG on the AC side. When power is supplied to the load using only the inverter, SWI is turned on and SW2 is turned off, and operation is performed at a constant frequency and constant voltage. When the battery becomes over-discharged, the DEG is first activated to restore the rated frequency and voltage. Next, while the inverter control device is supplying power to the load, set the inverter frequency fo to D.
After matching the frequency f of the EG, the phase difference between the output voltage of the inverter and the DEG is detected, and the frequency is modulated so that the phase of the inverter is aligned with the power phase of the DEG, and the voltage is also made equal to the output voltage of the DEG. Then, adjust the inverter voltage and perform synchronous addition. After that, the inverter is activated by the load power detection signal.
Switch to constant power control as the car load power setting value.
インバータは負の電力設定値のため、変換回路１１での
位相をインバータ出力（ＤＥＧ出力と等しい）での位相
より周波数を変調させることにより遅らせて整流器とし
て運転し、余剰電力をバッテリーに充電すると共にＤＥ
Ｇの出力を定格出力にできる。なお、バッテリーの充電
量が回復しＤＥＧを停止する時は、
逆にＤＥＧ出力がＯとなるようにインバータを制御した
後、ＳＷ２ （９）をしゃ断し、また定電圧。Since the inverter has a negative power setting value, it operates as a rectifier by delaying the phase at the conversion circuit 11 from the phase at the inverter output (equal to the DEG output) by modulating the frequency, and charges the battery with surplus power. D.E.
The output of G can be made the rated output. In addition, when the battery charge level is restored and the DEG is stopped, the inverter is controlled so that the DEG output becomes O, and then SW2 (9) is cut off and the voltage becomes constant again.
定周波数運転に切換える。Switch to constant frequency operation.
なお、インバータの制御は、ＤＥＧ出力信号をもとにＤ
Ｅ Ｇ出力電力が一定になるようなフィードバック制
御としてもよい。いずれの方式においてもインバータ電
力はインバータ容量（整流器運転時の）以下とすること
はいうまでもない。ＳＷｌ （８）はインバータを停止
する時に使用する。The inverter is controlled based on the DEG output signal.
Feedback control may be used to keep the EG output power constant. Needless to say, in either method, the inverter power must be less than or equal to the inverter capacity (when operating the rectifier). SWl (8) is used when stopping the inverter.
本発明によれば、Ｄ Ｅ Ｇ運転時は常に１． ＯＯ％
出力運転を行なうため、安定に低燃費の通用が実現され
る。According to the present invention, during DEG operation, 1. OO%
Due to output operation, stable and low fuel consumption is achieved.
また、負荷へは直接電力を供給するので高効率となる。Furthermore, since power is directly supplied to the load, it is highly efficient.
また、インバータとＤＥＧに同期併入を行なうための制
御機能をインバータにもたせたことにより、ＤＥＧに特
別の機能を有することなく低コストのディーゼル発電機
の採用を可能とした。Furthermore, by providing the inverter with a control function for synchronously joining the inverter and the DEG, it is possible to use a low-cost diesel generator without having a special function in the DEG.
第１図は、本発明の一実施例の説明図、第２図は、従来
のＤＣ並列方式の説明図である。
１・・・太陽電池、２・・・逆流防止ダイオード、３・
・・バッテリー制御装置、４・・・バッテリー、５・・
・インバータ、６・・・ディーゼルエンジン、７・・・
発電機、８・・・インバータ側併入用スイッチ、９・・
・Ｄ Ｅ Ｇ側スイッチ、１０・・・負荷。FIG. 1 is an explanatory diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a conventional DC parallel system. 1...Solar cell, 2...Backflow prevention diode, 3.
...Battery control device, 4...Battery, 5...
・Inverter, 6...Diesel engine, 7...
Generator, 8...Switch for inverter side connection, 9...
・DEG side switch, 10...Load.
Claims (1)
ー、バッテリーの充電量を監視制御するバッテリー制御
装置、バッテリーの電力を交流に変換し負荷に電力を供
給するインバータ、バッテリーが過放電になつた時にイ
ンバータに並列運転するディーゼル発電機からなるハイ
ブリッド構成の太陽光発電システムにおいて、インバー
タは負荷に電力を供給している状態でディーゼル発電機
に同期併入させる機能と、負荷電力またはディーゼル発
電機の出力電力信号をとりこみ、ディーゼル発電機と並
列運転中はディーゼル発電機出力電力をほぼ一定になる
ように制御する機能とを有することを特徴とする太陽光
発電システム。1. Solar cells, a battery that stores the power generated by the solar cells, a battery control device that monitors and controls the amount of charge in the battery, an inverter that converts battery power into AC and supplies power to the load, and a battery that is over-discharged. In a solar power generation system with a hybrid configuration consisting of a diesel generator that sometimes operates in parallel with an inverter, the inverter has the function of synchronously connecting the diesel generator while supplying power to the load, and the function of synchronously connecting the diesel generator with the load power or the diesel generator. A solar power generation system characterized by having a function of taking in an output power signal and controlling the output power of the diesel generator so as to be substantially constant during parallel operation with the diesel generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP601787A JPS63178734A (en) | 1987-01-16 | 1987-01-16 | Solar generating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP601787A JPS63178734A (en) | 1987-01-16 | 1987-01-16 | Solar generating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63178734A true JPS63178734A (en) | 1988-07-22 |
Family
ID=11626926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP601787A Pending JPS63178734A (en) | 1987-01-16 | 1987-01-16 | Solar generating system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63178734A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0522864A (en) * | 1991-07-05 | 1993-01-29 | Mitsubishi Electric Corp | Control circuit of inverter |
| JP2010098797A (en) * | 2008-10-14 | 2010-04-30 | Sharp Corp | Solar light generating system |
-
1987
- 1987-01-16 JP JP601787A patent/JPS63178734A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0522864A (en) * | 1991-07-05 | 1993-01-29 | Mitsubishi Electric Corp | Control circuit of inverter |
| JP2010098797A (en) * | 2008-10-14 | 2010-04-30 | Sharp Corp | Solar light generating system |
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