JP2000287382A - Battery charge-discharge device - Google Patents
Battery charge-discharge deviceInfo
- Publication number
- JP2000287382A JP2000287382A JP11089100A JP8910099A JP2000287382A JP 2000287382 A JP2000287382 A JP 2000287382A JP 11089100 A JP11089100 A JP 11089100A JP 8910099 A JP8910099 A JP 8910099A JP 2000287382 A JP2000287382 A JP 2000287382A
- Authority
- JP
- Japan
- Prior art keywords
- charging
- storage battery
- solar cell
- discharging device
- 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.)
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- 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
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Control Of Electrical Variables (AREA)
- Inverter Devices (AREA)
- Photovoltaic Devices (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、太陽光発電用蓄電
池充放電装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery charging / discharging device for photovoltaic power generation.
【０００２】[0002]
【従来の技術】従来の太陽光発電用蓄電池充放電装置シ
ステムとしては、例えば、図５に示す構成のものがあ
る。商用電力系統に正常な電圧が印加されている場合に
は、太陽電池から出力される直流電力をインバータによ
って交流電力に変換し、連系接続用端子から負荷に電力
を供給して連系運転するとともに、太陽電池の出力は蓄
電池充放電装置を介して蓄電池への充電が行われる。一
方、商用電力系統が停電になると、太陽電池の出力が自
立負荷容量よりも小さい場合には、太陽電池だけでな
く、蓄電池から出力される直流電力もインバータによっ
て交流電力に変換し、自立運転端子からは日射状態に関
わらず自立負荷に安定した交流電力を供給することがで
きるとともに、太陽電池の出力が負荷電力よりも大きい
場合には、蓄電池に充電を行うことができる。2. Description of the Related Art As a conventional storage battery charging / discharging system for photovoltaic power generation, for example, there is a configuration shown in FIG. When a normal voltage is applied to the commercial power system, the DC power output from the solar cell is converted into AC power by an inverter, and power is supplied to the load from the connection connection terminal to perform the connection operation. At the same time, the output of the solar cell is charged to the storage battery via the storage battery charging / discharging device. On the other hand, when the commercial power system loses power, if the output of the solar cell is smaller than the self-sustained load capacity, not only the solar cell but also the DC power output from the storage battery is converted into AC power by the inverter, and the self-sustained operation terminal is operated. Thus, stable AC power can be supplied to the independent load irrespective of the state of solar radiation, and when the output of the solar cell is larger than the load power, the storage battery can be charged.
【０００３】蓄電池充放電装置の充電回路部の構成例を
図６に示す。太陽電池から畜電池への充電を行なう動作
としては、蓄電池が満充電状態ではなく、蓄電池電圧が
低い状態にある場合には蓄電池を一定電流で充電し、蓄
電池が満充電付近に達して電圧が上昇すれば、一定電圧
で充電させるものである。FIG. 6 shows an example of the configuration of a charging circuit of a storage battery charging / discharging device. As an operation for charging the storage battery from the solar battery, when the storage battery is not in a fully charged state and the storage battery voltage is in a low state, the storage battery is charged at a constant current, and the storage battery reaches a vicinity of full charge and the voltage is reduced. If it rises, it is charged at a constant voltage.
【０００４】具体的には、蓄電池充電装置は、Ｑ１、Ｄ
１、Ｌで構成される降圧回路及びＱ２、Ｄ２、Ｌから構
成される昇圧回路で成っており、太陽電池電圧＞蓄電池
電圧の場合には、降圧回路１により蓄電池を充電し、太
陽電池電圧＜蓄電池電圧の場合には、昇圧回路２によっ
て蓄電池を充電する。その際、Ｑ１またはＱ２のＰＷＭ
制御により、充電回路の出力を制御する。制御方法とし
ては、充電装置の出力電圧及び出力電流を検出し、それ
ぞれ誤差増幅器ＣＰ１，ＣＰ２に入力するが、充電装置
の出力電圧及び、出力電流のうち予め設定された基準値
に近い方の誤差増幅器出力が支配的となり、その値がＰ
ＷＭ比較回路３に入力される。[0004] Specifically, the storage battery charging device includes Q1, D
1, a step-down circuit composed of L and a step-up circuit composed of Q2, D2, and L. When the solar cell voltage> the storage battery voltage, the storage battery is charged by the step-down circuit 1 and the solar cell voltage < In the case of the storage battery voltage, the storage battery is charged by the booster circuit 2. At that time, the PWM of Q1 or Q2
The control controls the output of the charging circuit. As a control method, the output voltage and the output current of the charging device are detected and input to the error amplifiers CP1 and CP2, respectively, and the error of the output voltage and the output current of the charging device which is closer to a preset reference value is used. The amplifier output becomes dominant and its value is P
It is input to the WM comparison circuit 3.
【０００５】例えば、蓄電池が深い放電状態にある場合
には、充電装置の出力電圧側に接続された誤差増幅器Ｃ
Ｐ１の出力が大きくなる為、充電装置の出力電流側に接
続された誤差増幅器ＣＰ２出力が支配的となり、定電流
充電となるようにＰＷＭ制御がなされる。[0005] For example, when the storage battery is in a deep discharge state, the error amplifier C connected to the output voltage side of the charging device.
Since the output of P1 increases, the output of the error amplifier CP2 connected to the output current side of the charging device becomes dominant, and PWM control is performed so as to perform constant current charging.
【０００６】また、蓄電池充放電装置は、商用電源が停
電時のみ蓄電池の放電動作を行う為に、系統電圧が正常
な場合には太陽電池から蓄電池への充電を行い、停電の
場合には負荷容量に対し太陽電池の発電量が少なけれ
ば、蓄電池を放電させ、太陽電池の発電量が多ければ、
蓄電池に充電の動作をさせるという判定を行う系統電圧
検出機能を有する。The storage battery charging / discharging device discharges the storage battery only when the commercial power supply is out of power. Therefore, when the system voltage is normal, the storage battery is charged from the solar battery to the storage battery. If the power generation of the solar cell is small for the capacity, the storage battery is discharged, and if the power generation of the solar cell is large,
It has a system voltage detection function for determining that the storage battery is to be charged.
【０００７】[0007]
【発明が解決しようとする課題】ところが、このような
太陽光発電用蓄電池充放電装置システムにおいては、通
常、蓄電池の充電方法として一定電流で充電し満充電領
域に達すると、一定電圧で充電させるものが一般的であ
るが、太陽電池の出力電力が低い場合には、蓄電池充電
装置が蓄電池を定電流充電させようとしても、充電に必
要な所定電流を得ることができないにも関わらず、充電
器は太陽電池から電流を引き出そうとするため、太陽電
池の動作電圧は低くなる。結果この電圧が、充放電装置
の最低動作電圧を下回れば、充放電装置は停止される。
しかし、充放電装置が停止すると太陽電池の動作電圧は
開放電圧付近まで上昇するため、充放電装置は再び動作
し始める。以上の動作により、充放電装置が動作と停止
とを繰り返すことになる。However, in such a storage battery charging / discharging device system for photovoltaic power generation, the storage battery is usually charged at a constant current as a charging method, and then charged at a constant voltage when the storage battery reaches a full charge region. In general, when the output power of the solar cell is low, even if the storage battery charging device attempts to charge the storage battery with a constant current, the charging cannot be performed even though the predetermined current required for the charging cannot be obtained. The operating voltage of the solar cell is reduced because the cell attempts to draw current from the solar cell. As a result, if this voltage falls below the minimum operating voltage of the charging / discharging device, the charging / discharging device is stopped.
However, when the charging / discharging device stops, the operating voltage of the solar cell rises to near the open voltage, and the charging / discharging device starts operating again. With the above operation, the charging / discharging device repeats the operation and the stop.
【０００８】従って、太陽電池の動作点がダイナミック
に変動し、インバータが安定に動作できなくなる。ま
た、充電器が動作と停止動作を繰り返すことにより、充
電器から音が発生するという問題がある。Accordingly, the operating point of the solar cell fluctuates dynamically, and the inverter cannot operate stably. In addition, there is a problem that a sound is generated from the charger when the charger repeats the operation and the stop operation.
【０００９】更に、蓄電池充放電装置の系統電圧検出機
能が、例えば検出信号線の断線等により停電であると判
断してしまえば、連系運転中にも関わらず蓄電池が放電
されることになる。従って、蓄電池が放電された状態で
停電が発生した場合、蓄電池から負荷に電力を供給しよ
うとしても、蓄電池には、充分なエネルギーが充電され
ていないという問題がある。Further, if the system voltage detection function of the storage battery charging / discharging device determines that a power failure has occurred due to, for example, disconnection of a detection signal line, the storage battery will be discharged despite the interconnection operation. . Therefore, when a power failure occurs in a state where the storage battery is discharged, there is a problem that the storage battery is not charged with sufficient energy even if an attempt is made to supply power to the load from the storage battery.
【００１０】本発明は、上記の問題点を解決するために
なされたもので、その目的とするところは、太陽電池の
動作点を安定させ且停電を確実に検出できる蓄電池充放
電装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a storage battery charging / discharging apparatus capable of stabilizing an operating point of a solar cell and reliably detecting a power failure. It is in.
【００１１】[0011]
【課題を解決するための手段】請求項１記載の発明にあ
っては、太陽電池と、蓄電池と、蓄電池を充放電せしめ
る充放電装置と、太陽電池または蓄電池からの直流電力
を交流電力に変換して出力するインバータとを備え、自
立運転時のみ蓄電池から放電する蓄電池型太陽光発電シ
ステムにおいて、前記太陽電池の出力が低い場合には前
記充放電装置の充電方法を一定電流充電としないことを
特徴とするものである。According to the present invention, a solar cell, a storage battery, a charging / discharging device for charging / discharging the storage battery, and DC power from the solar battery or storage battery are converted to AC power. And an inverter that outputs the charging and discharging operation, and in a storage battery type solar power generation system that discharges from the storage battery only during self-sustaining operation, when the output of the solar cell is low, the charging method of the charging and discharging device is not set to constant current charging. It is a feature.
【００１２】請求項２記載の発明にあっては、前記太陽
電池の出力が低く前記充放電装置の充電電流が充分でな
い場合には、充放電装置の充電動作を一定時間停止させ
ることを特徴とするものである。According to a second aspect of the present invention, when the output of the solar cell is low and the charging current of the charging / discharging device is not sufficient, the charging operation of the charging / discharging device is stopped for a predetermined time. Is what you do.
【００１３】請求項３記載の発明にあっては、前記太陽
電池の電圧および電力を監視し、太陽電池出力が低く所
定値に満たない場合には前記充放電装置の充電動作を停
止させることを特徴とするものである。According to the third aspect of the present invention, the voltage and power of the solar cell are monitored, and when the solar cell output is low and less than a predetermined value, the charging operation of the charging / discharging device is stopped. It is a feature.
【００１４】請求項４記載の発明にあっては、前記太陽
電池の出力が低い場合には前記充放電装置を定電圧で充
電動作することを特徴とするものである。According to a fourth aspect of the present invention, when the output of the solar cell is low, the charging / discharging device is charged at a constant voltage.
【００１５】請求項５記載の発明にあっては、太陽電池
と、蓄電池と、蓄電池を充放電せしめる充放電装置と、
太陽電池または蓄電池からの直流電力を交流電力に変換
して連系運転時には連系端子から、自立運転時には自立
端子から電力を出力するインバータとを備え、自立運転
時のみ蓄電池から放電する蓄電型太陽光発電システムに
おいて、前記充放電装置にインバータの連系運転時の出
力電流の有無を監視する電流監視部と、商用電源の有無
を監視するインバータとを設け、インバータ出力電流が
無く、商用電源も無い時にのみ蓄電池が放電動作するよ
うにしたことを特徴とするものである。According to a fifth aspect of the present invention, there is provided a solar cell, a storage battery, and a charging and discharging device for charging and discharging the storage battery.
An inverter that converts DC power from a solar cell or a storage battery into AC power and outputs power from a connection terminal during interconnection operation and from an independent terminal during independent operation, and discharges from the storage battery only during independent operation. In the photovoltaic power generation system, the charging / discharging device is provided with a current monitoring unit that monitors the presence or absence of an output current during the interconnection operation of the inverter, and an inverter that monitors the presence or absence of the commercial power supply. The storage battery is configured to perform a discharging operation only when there is no battery.
【００１６】[0016]
【発明の実施の形態】以下、本発明に係る蓄電池充放電
装置の第１の実施の形態を図１に、第２の実施の形態を
図２に、第３の実施の形態を図３に、第４の実施の形態
基づいて、夫々詳細に説明する。 ［第１の実施の形態］第１図は本発明の第１実施例を示
す回路図である。本実施の形態が上述した図６に示す従
来例と異なる点は、立ち下がり検出部ＫとタイマＴとを
設けて、充電装置の出力電流を検出しておき、太陽電池
の出力不足によりこの検出値が低下すれば、その立ち下
がりを検出してタイマーを動作させる。ここで、電流の
検出方法については一般に２種類の方法があり、１つ
は、シャント抵抗（数ｍオーム抵抗で電流検出専用の抵
抗）によって流れる電流を電圧変換して検出する方法
で、もう１つは、ＣＴ（電流検出用トランスでカレント
トランスの略）によって、回路に流れる電流を絶縁し
て、電圧変換して検出する方法である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a storage battery charging / discharging device according to the present invention is shown in FIG. 1, a second embodiment is shown in FIG. 2, and a third embodiment is shown in FIG. The fourth embodiment will be described in detail. [First Embodiment] FIG. 1 is a circuit diagram showing a first embodiment of the present invention. This embodiment is different from the conventional example shown in FIG. 6 described above in that a falling detector K and a timer T are provided to detect the output current of the charging device, and this detection is performed due to insufficient output of the solar cell. If the value decreases, the falling is detected and the timer is operated. Here, there are generally two types of current detection methods. One is a method of converting the current flowing through a shunt resistor (a resistor dedicated to current detection with a resistance of several mΩ) into a voltage and detecting it. One is a method in which a current flowing in a circuit is insulated by a CT (abbreviation of a current transformer for a current detection transformer), and the voltage is converted to be detected.
【００１７】従って、これらいずれかの方法により、立
ち下がり検出部Ｋが電流検出値を電圧変換し、タイマＴ
動作中はＰＷＭ比較回路３はゼロ電圧信号を出力すれ
ば、ＰＷＭ制御は一定時間停止させることができる。 ［第２の実施の形態］第２図は、太陽電池の電圧および
電力を監視しておき、太陽電池出力が低い場合には、蓄
電池への充電動作を停止させる回路例である。太陽電池
の電圧、電力を比較器ＣＰ４，ＣＰ５に入力し、基準値
と比較する。その比較結果がいずれか一方のみでもＬＯ
Ｗの場合には、ＰＷＭ比較回路ＣＰ３によりＰＷＭ制御
が停止し、太陽電池から蓄電池への充電が行なわれな
い。Therefore, by any of these methods, the fall detecting section K converts the current detection value into a voltage, and the timer T
During operation, if the PWM comparison circuit 3 outputs a zero voltage signal, the PWM control can be stopped for a certain period of time. [Second Embodiment] FIG. 2 is an example of a circuit for monitoring the voltage and power of a solar cell and stopping the operation of charging the storage battery when the output of the solar cell is low. The voltage and power of the solar cell are input to comparators CP4 and CP5, and are compared with reference values. Even if only one of the comparison results is LO
In the case of W, the PWM control is stopped by the PWM comparison circuit CP3, and the solar battery does not charge the storage battery.
【００１８】ここで、太陽電池の電力は掛算器Ｏにより
太陽電池の出力電圧と出力電流の積によって算出する。
また、太陽電池電圧および電力を監視する理由は、特に
自立運転中には太陽電池の動作点はインバータの自立負
荷容量によって決定されるため、例えば、負荷容量が小
さい場合には太陽電池が高出力可能であっても、低電力
の動作点で動作することがある。従って、太陽電池出力
は電力のみでなく、電圧も検出する必要がある。 ［第３の実施の形態］第３図は、太陽電池出力が低く、
充電装置の充電電流が所定値に満たない場合には、太陽
電池の動作電圧を一定にする回路例である。太陽電池の
電圧を検出し、誤差増幅器ＣＰ６に入力する。その際、
蓄電池電圧が低く太陽電池出力が低い場合には太陽電池
の動作点は基準電圧で動作されるために定電圧動作とな
る。Here, the power of the solar cell is calculated by the multiplier O by the product of the output voltage and the output current of the solar cell.
Also, the reason for monitoring the solar cell voltage and power is that the operating point of the solar cell is determined by the independent load capacity of the inverter, particularly during the self-sustaining operation. Even if possible, it may operate at a low power operating point. Therefore, the solar cell output needs to detect not only power but also voltage. [Third Embodiment] FIG. 3 shows that the solar cell output is low,
This is an example of a circuit that keeps the operating voltage of the solar cell constant when the charging current of the charging device is less than a predetermined value. The voltage of the solar cell is detected and input to the error amplifier CP6. that time,
When the storage battery voltage is low and the output of the solar cell is low, the operating point of the solar cell is operated at the reference voltage, so that the operation point is a constant voltage operation.
【００１９】即ち誤差増幅器ＣＰ１，ＣＰ２，ＣＰ６の
入力端子の電圧を図の様に（Ｖ１，Ｖ２）と（Ｖ３，Ｖ
４）と（Ｖ５，Ｖ６）とすると、（Ｖ２-Ｖ１）と（Ｖ
４-Ｖ３）と（Ｖ６-Ｖ５）において、その計算値がゼロ
に近いものが支配的になる。That is, the voltages at the input terminals of the error amplifiers CP1, CP2, and CP6 are set to (V1, V2) and (V3, V
4) and (V5, V6), (V2-V1) and (V5
In (4-V3) and (V6-V5), those whose calculated values are close to zero become dominant.
【００２０】ここで、蓄電池を充電するには、蓄電池が
満充電ではないため、（Ｖ２-Ｖ１）>>０となって、Ｃ
Ｐ２かＣＰ３が支配的になる。また、日射量が高ければ
太陽電池から蓄電池への充電はＣＰ２が支配的になり、
安定に定電流で充電が行われる。一方太陽電池出力が低
い場合には、蓄電池への充電電流が十分取れないため、
（Ｖ４-Ｖ３）>>０になり、ＣＰ３が支配的になる。従
って、太陽電池の検出電圧Ｖ５は、Ｖ６付近で動作する
ことになり、太陽電池の動作点は定電圧で動作する。 ［第４の実施の形態］図４は、電流の有無を監視する電
流監視部及び、商用電源の電圧の有無を監視する電圧監
視部を設けた蓄電池充放電装置の制御回路例である。こ
のシステムにおいては、商用電源の電圧又はインバータ
の電流が検出される場合は系統の停電ではないため、蓄
電池は放電することなく、充電のみの動作となる。商用
電源の電圧とインバータの電流を検出し、夫々比較器Ｃ
Ｐ７と比較器ＣＰ８によって基準値と比較する。この比
較器ＣＰ７又は比較器ＣＰ８の出力がどちらか一方でも
Ｈｉｇｈになれば、充放電装置へ放電停止指令を与え蓄
電池を放電させないようにする。Here, in order to charge the storage battery, since the storage battery is not fully charged, (V2-V1) >> 0, and C
P2 or CP3 becomes dominant. Also, if the amount of solar radiation is high, the charge from the solar cell to the storage battery is dominated by CP2,
Charging is performed stably at a constant current. On the other hand, when the solar cell output is low, the charging current to the storage battery cannot be sufficiently obtained,
(V4-V3) >> 0, and CP3 becomes dominant. Therefore, the detection voltage V5 of the solar cell operates near V6, and the operating point of the solar cell operates at a constant voltage. [Fourth Embodiment] FIG. 4 shows an example of a control circuit of a battery charging / discharging device provided with a current monitoring unit for monitoring the presence or absence of a current and a voltage monitoring unit for monitoring the presence or absence of a voltage of a commercial power supply. In this system, when the voltage of the commercial power supply or the current of the inverter is detected, it is not a power failure of the system, and thus the storage battery operates only for charging without discharging. The voltage of the commercial power supply and the current of the inverter are detected, and the comparator C
P7 is compared with a reference value by a comparator CP8. If the output of either the comparator CP7 or the comparator CP8 becomes High, a discharge stop command is given to the charging / discharging device so that the storage battery is not discharged.
【００２１】[0021]
【発明の効果】請求項１記載の発明によれば、太陽電池
の出力が低い場合には充放電装置の充電方法を一定電流
充電としない。これにより、低日射時に太陽電池の動作
点を安定させることができると言う効果を奏する。According to the first aspect of the present invention, when the output of the solar cell is low, the charging method of the charging / discharging device is not set to the constant current charging. Thereby, there is an effect that the operating point of the solar cell can be stabilized during low solar radiation.
【００２２】請求項２記載の発明によれば、請求項１記
載の発明の効果に加え更に、蓄電池電圧が低く太陽電池
出力が低い場合には、太陽電池の動作点は、基準電圧で
動作されるため、定電圧動作となると言う効果を奏す
る。According to the invention of claim 2, in addition to the effect of the invention of claim 1, when the storage battery voltage is low and the solar cell output is low, the operating point of the solar cell is operated at the reference voltage. Therefore, there is an effect that a constant voltage operation is performed.
【００２３】請求項３記載の発明によれば、太陽電池の
電圧および電力を監視し、太陽電池出力が低く所定値に
満たない場合には充放電装置の充電動作を停止させ、低
日射時に太陽電池の動作点を安定させることができると
言う効果を奏する。According to the third aspect of the present invention, the voltage and power of the solar cell are monitored, and when the output of the solar cell is low and less than a predetermined value, the charging operation of the charging / discharging device is stopped. This has the effect of stabilizing the operating point of the battery.
【００２４】請求項４記載の発明によれば、請求項１乃
至３記載の発明の効果に加え更に、太陽電池の出力が低
い場合には前記充放電装置を定電圧で充電動作させ、低
日射時でも蓄電池を安定して充電することができると言
う効果を奏する。According to the fourth aspect of the present invention, in addition to the effects of the first to third aspects, when the output of the solar cell is low, the charging / discharging device is charged at a constant voltage to perform low solar radiation. This has the effect that the storage battery can be charged stably even at the time.
【００２５】請求項５記載の発明によれば、自立運転時
のみ蓄電池が放電動作するので、蓄電池充放電装置で停
電を誤検出することなく、確実に停電時のみ蓄電池が放
電動作を行うことができると言う効果を奏する。According to the fifth aspect of the present invention, since the storage battery performs the discharging operation only during the self-sustaining operation, the storage battery can reliably perform the discharging operation only during the power failure without erroneously detecting the power failure by the storage battery charging / discharging device. It has the effect of being able to do it.
【図１】本発明に係わる蓄電池充放電装置の第１の実施
の形態を示す回路図である。FIG. 1 is a circuit diagram showing a first embodiment of a storage battery charging / discharging device according to the present invention.
【図２】本発明に係わる蓄電池充放電装置の第２の実施
の形態を示す回路図である。FIG. 2 is a circuit diagram showing a second embodiment of the battery charging / discharging device according to the present invention.
【図３】本発明に係わる蓄電池充放電装置の第３の実施
の形態を示す回路図である。FIG. 3 is a circuit diagram showing a third embodiment of the battery charging / discharging device according to the present invention.
【図４】本発明に係わる蓄電池充放電装置の第４の実施
の形態を示す回路図である。FIG. 4 is a circuit diagram showing a fourth embodiment of the storage battery charge / discharge device according to the present invention.
【図５】従来の蓄電池型太陽光発電システムを示す構成
図である。FIG. 5 is a configuration diagram showing a conventional battery-type solar power generation system.
【図６】上記蓄電池型太陽光発電システムの蓄電池充放
電装置の一実施の形態を示す回路図である。FIG. 6 is a circuit diagram showing an embodiment of a storage battery charge / discharge device of the storage battery type solar power generation system.
１ 降圧回路 ２ 昇圧回路 ＣＰ１ 誤差増幅器 ＣＰ２ 誤差増幅器 ＣＰ３ ＰＷＭ比較回路 ＣＰ４ 比較器 ＣＰ５ 比較器 ＣＰ６ 誤差増幅器 ＣＰ７ 比較器 ＣＰ８ 比較器 Ｏ 掛算器 Ｋ 立ち下がり検出部 Ｔ タイマ Ｎ Ｑ１，Ｑ２コントロール回路 Ｍ 三角波発生回路 Reference Signs List 1 step-down circuit 2 step-up circuit CP1 error amplifier CP2 error amplifier CP3 PWM comparison circuit CP4 comparator CP5 comparator CP6 error amplifier CP7 comparator CP8 comparator O multiplier K falling detector T timer NQ1, Q2 control circuit M triangular wave generation circuit
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０２Ｍ 7/48 Ｈ０２Ｍ 7/48 Ｍ ５Ｈ４２０ Ｈ０１Ｌ 31/04 Ｋ (72)発明者 東浜 弘忠 大阪府門真市大字門真1048番地松下電工株 式会社内 (72)発明者 吉武 晃 大阪府門真市大字門真1048番地松下電工株 式会社内 (72)発明者 岡本 信一郎 大阪府門真市大字門真1048番地松下電工株 式会社内 (72)発明者 国本 洋一 大阪府門真市大字門真1048番地松下電工株 式会社内 (72)発明者 向井 忠吉 大阪府門真市大字門真1048番地松下電工株 式会社内 Ｆターム(参考） 5F051 JA17 KA02 KA04 KA05 5G003 AA06 BA01 CA03 CC02 DA07 DA16 GA01 GB06 5G015 FA13 FA16 GA11 HA03 HA16 JA08 JA11 JA19 JA23 JA32 JA34 JA35 JA37 JA53 JA55 JA64 5H007 AA05 BB07 CC01 CC09 DA06 DC05 FA02 FA12 5H030 AA03 AA04 AS03 BB07 BB21 FF42 5H420 BB03 BB12 CC03 CC06 DD03 EA02 EB39 FF03 FF22 FF25 LL10 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H02M 7/48 H02M 7/48 M 5H420 H01L 31/04 K (72) Inventor Hirotada Higashihama Kadoma, Osaka Akira Yoshitake 1048, Matsushita Electric Works Co., Ltd. (72) Inventor Akira Yoshitake, 1048 Matsushita Electric Works Co., Ltd., Kadoma, Osaka Prefecture In-house (72) Inventor Yoichi Kunimoto 1048, Kazuma Kadoma, Kadoma-shi, Osaka Prefecture Inside Matsushita Electric Works Co., Ltd. 5F051 JA17 KA02 KA04 KA05 5G003 AA06 BA01 CA03 CC02 DA07 DA16 GA01 GB06 5G015 FA13 FA16 GA11 HA03 HA16 JA08 JA11 JA19 JA23 JA32 JA34 JA35 JA37 JA53 JA55 JA64 5H007 AA05 BB07 CC01 CC09 DA06 DC05 FA02 FA12 5H030 AA03 AA04 AS03 BB07 BB21 FF42 5H420 BB03 BB12 CC03 CC06 DD03 EA02 EB39 FF03 FF22 FF25 LL10
Claims (5)
せしめる充放電装置と、太陽電池または蓄電池からの直
流電力を交流電力に変換して出力するインバータとを備
え、自立運転時のみ蓄電池から放電する蓄電池型太陽光
発電システムにおいて、太陽電池の出力が低い場合には
充放電装置の充電方法を一定電流充電としないことを特
徴とする蓄電池充放電装置。1. A solar battery, a storage battery, a charging / discharging device for charging / discharging the storage battery, and an inverter for converting DC power from the solar battery or the storage battery into AC power and outputting the AC power, wherein the storage battery is used only during an independent operation. A storage battery charging / discharging device, wherein a charging method of the charging / discharging device is not set to constant current charging when the output of the solar cell is low in a discharging storage battery type solar power generation system.
の充電電流が充分でない場合には、充放電装置の充電動
作を一定時間停止させることを特徴とする請求項１記載
の蓄電池充放電装置。2. The charging / discharging of a storage battery according to claim 1, wherein the charging operation of the charging / discharging device is stopped for a predetermined time when the output of the solar cell is low and the charging current of the charging / discharging device is not sufficient. apparatus.
し、太陽電池出力が低く所定値に満たない場合には、充
放電装置の充電動作を停止させることを特徴とする請求
項１記載の蓄電池充放電装置。3. The storage battery according to claim 1, wherein the voltage and power of the solar cell are monitored, and when the output of the solar cell is low and less than a predetermined value, the charging operation of the charging / discharging device is stopped. Charge / discharge device.
放電装置を定電圧で充電動作させることを特徴とする請
求項１記載の蓄電池充放電装置。4. The storage battery charging / discharging device according to claim 1, wherein the charging / discharging device is charged at a constant voltage when the output of the solar cell is low.
せしめる充放電装置と、太陽電池または蓄電池からの直
流電力を交流電力に変換して連系運転時には連系端子か
ら、自立運転時には自立端子から電力を出力するインバ
ータとを備え、自立運転時のみ蓄電池から放電する蓄電
型太陽光発電システムにおいて、充放電装置にインバー
タの連系運転時の出力電流の有無を監視する電流監視部
と、商用電源の有無を監視するインバータと、インバー
タ出力電流が無く、商用電源も無い時にのみ蓄電池が放
電動作する蓄電池充放電装置と、を設けたことを特徴と
する蓄電型太陽光発電システム。5. A solar cell, a storage battery, a charging / discharging device for charging / discharging the storage battery, and a DC power from the solar battery or the storage battery converted to AC power from an interconnection terminal during an interconnection operation, and an autonomous operation during an independent operation. An inverter that outputs power from a terminal, and in a storage type photovoltaic power generation system that discharges from a storage battery only during self-sustaining operation, a current monitoring unit that monitors the presence or absence of an output current when the charging and discharging device is connected to the inverter, A power storage type solar power generation system, comprising: an inverter for monitoring the presence or absence of a commercial power supply; and a storage battery charging / discharging device in which the storage battery discharges only when there is no inverter output current and no commercial power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08910099A JP3570283B2 (en) | 1999-03-30 | 1999-03-30 | Battery charging / discharging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08910099A JP3570283B2 (en) | 1999-03-30 | 1999-03-30 | Battery charging / discharging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000287382A true JP2000287382A (en) | 2000-10-13 |
| JP3570283B2 JP3570283B2 (en) | 2004-09-29 |
Family
ID=13961480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08910099A Expired - Fee Related JP3570283B2 (en) | 1999-03-30 | 1999-03-30 | Battery charging / discharging device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3570283B2 (en) |
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| JP2010206912A (en) * | 2009-03-03 | 2010-09-16 | Hitachi Koki Co Ltd | Charger |
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