JP2006230097A - Independent system power supply device and control method - Google Patents

Independent system power supply device and control method Download PDF

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JP2006230097A
JP2006230097A JP2005040417A JP2005040417A JP2006230097A JP 2006230097 A JP2006230097 A JP 2006230097A JP 2005040417 A JP2005040417 A JP 2005040417A JP 2005040417 A JP2005040417 A JP 2005040417A JP 2006230097 A JP2006230097 A JP 2006230097A
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storage battery
amount
load
solar
solar radiation
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Tomoyuki Moriyama
友幸 森山
Osamu Ide
治 井手
Akira Yano
章 谷野
Kazu Tsuchiya
和 土屋
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Shimane University
Taiyo Kogyo Co Ltd
Fukuoka Prefecture
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Shimane University
Taiyo Kogyo Co Ltd
Fukuoka Prefecture
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    • Y02E60/10—Energy storage using batteries

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Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive independent system power supply device wherein, even when charging of a storage battery has been stopped because of overcharging, solar irradiance can be continuously computed, and to provide a control method of the power supply device. <P>SOLUTION: The control method for independent system power supply devices is so constructed that a storage battery 2 is connected to a solar battery 1, and a load 4 is operated with the stored energy in the storage battery 2. A solar irradiance is computed by a charging current to the storage battery 2, and the operation of the load 4 is controlled based on the solar irradiance. When overcharging is detected in the storage battery 2, the connection of the solar battery 1 is switched to a load 7 for generated current detection, and a solar irradiance is continuously computed from the generated current passed through the load 7 for generated current detection. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は太陽光発電により、建物内の換気装置、遮光装置、冷房装置等に電力供給を行う独立系電源装置に関するものである。   The present invention relates to an independent power supply device that supplies power to a ventilation device, a light shielding device, a cooling device, and the like in a building by solar power generation.

従来より、日射量に応じた発電量を出力する太陽電池を商用電力系統と接続し、太陽電池の発電量（すなわち、日射量）に基づいて建物内の換気装置や遮光装置、或いは冷房装置等の動作を制御することにより、屋内温度を適切な状態に管理するようにした太陽光発電施設（系統連携装置）が知られている（特許文献１参照）。   Conventionally, a solar cell that outputs a power generation amount corresponding to the amount of solar radiation is connected to a commercial power system, and a ventilation device, a light shielding device, a cooling device, etc. in a building based on the power generation amount (ie, solar radiation amount) of the solar cell, etc. There is known a photovoltaic power generation facility (system linkage device) that manages the indoor temperature in an appropriate state by controlling the operation of the system (see Patent Document 1).

通常、上記系統連携装置は、負荷の電力消費が少なくて太陽電池の発電電力に余剰が生じた場合に余剰電力を商用電力系統へ放電（売電）すると共に、日射量が少なく電力が不足した場合に商用電力系統から電力の不足分を補充（買電）する機能を搭載した制御装置を備えている。   Normally, the above-described grid-linked device discharges (sells) surplus power to the commercial power system when the power consumption of the solar battery is low and surplus in the generated power of the solar cell, and the solar radiation is low and the power is insufficient In some cases, a control device equipped with a function of supplementing (purchasing power) a shortage of power from the commercial power system is provided.

従って、このような系統連携装置では、発電可能な日射が得られる間は、太陽電池は常に発電を継続し、負荷の電力消費の有無にかかわらず上記制御装置において日射量の算定が可能である。   Therefore, in such a grid-linking device, the solar cell always generates power while solar radiation capable of generating power is obtained, and the amount of solar radiation can be calculated in the control device regardless of whether or not the load consumes power. .

一方、商用電力系統との接続を行わない独立系電源装置では、太陽電池の発電電流を充電する蓄電池を備え、この蓄電池の蓄積エネルギーを使用して負荷の動作を制御することにより、日射量の少ない時にでも負荷の安定動作が得られるようにしている。
また、通常、このような蓄電池を備えた独立系電源装置では、太陽電池の発電電力量が負荷の電力消費量を上回った場合に充電が行われるが、充電電圧が一定値以上に達した場合に、蓄電池を保護する目的で太陽電池と蓄電池の接続を遮断して蓄電池への充電を停止する過充電防止機能が備えられている。
特開平１１−８１５７９ On the other hand, an independent power supply device that is not connected to the commercial power system includes a storage battery that charges the generated current of the solar battery, and uses the stored energy of the storage battery to control the operation of the load, thereby reducing the amount of solar radiation. A stable load operation can be obtained even when there are few.
Also, normally, in an independent power supply device equipped with such a storage battery, charging is performed when the amount of power generated by the solar cell exceeds the power consumption of the load, but when the charging voltage reaches a certain value or more In addition, for the purpose of protecting the storage battery, there is provided an overcharge prevention function for cutting off the connection to the storage battery by cutting off the connection between the solar battery and the storage battery.
JP-A-11-81579

ところが、係る独立系電源装置の場合、既述したように、蓄電池に過充電が生じた時に太陽電池と蓄電池の接続が遮断されることから、系統連携装置のように、制御装置において太陽電池の発電量より日射量を算定することができなくなるという問題があった。   However, in the case of such an independent power supply device, as described above, when the storage battery is overcharged, the connection between the solar cell and the storage battery is cut off. There was a problem that the amount of solar radiation could not be calculated from the amount of power generation.

本発明は、このような独立系電源装置が有する問題に鑑み成されたもので、蓄電池に過充電が生じて太陽電池と蓄電池の接続が遮断されても、その間も継続して日射量の算定が行える独立系電源装置および制御方法を提供することを目的としている。   The present invention has been made in view of the problems of such an independent power supply device, and even if the storage battery is overcharged and the connection between the solar battery and the storage battery is cut off, the solar radiation amount is continuously calculated during that time. It is an object of the present invention to provide an independent power supply apparatus and a control method capable of performing the above.

すなわち、請求項１に記載の本発明は、太陽電池に蓄電池を接続し、当該蓄電池の蓄積エネルギーにより負荷を動作するようにした独立系電源装置の制御方法であって、前記蓄電池への充電電流より日射量を算定し、当該日射量に基づいて負荷の動作を制御することを特徴としている。   That is, the present invention according to claim 1 is a control method of an independent power supply apparatus in which a storage battery is connected to a solar battery and a load is operated by the stored energy of the storage battery, and the charging current to the storage battery is Further, the solar radiation amount is calculated, and the operation of the load is controlled based on the solar radiation amount.

また、請求項２に記載の本発明は、請求項１に記載の独立系電源装置の制御方法において、前記蓄電池の過充電を検出すると、前記太陽電池と前記蓄電池の接続を遮断すると共に、前記太陽電池を発電電流検知用負荷に切り換えて接続し、当該発電電流検知用負荷を流れる電流より日射量を算定することを特徴としている。   Further, according to a second aspect of the present invention, in the method for controlling an independent power supply device according to the first aspect, when overcharge of the storage battery is detected, the connection between the solar battery and the storage battery is interrupted, and The solar battery is switched to a generated current detection load and connected, and the amount of solar radiation is calculated from the current flowing through the generated current detection load.

また、請求項３に記載の本発明は、日射量に応じた発電量を出力する太陽電池と、当該太陽電池の発電電流を充電する蓄電池とを備え、日射量に基づき、当該蓄電池の蓄積エネルギーにより負荷の動作を制御する独立系電源装置において、前記蓄電池への充電電流を検知して前記日射量を算定する制御装置を備えることを特徴としている。   Moreover, this invention of Claim 3 is equipped with the solar cell which outputs the electric power generation amount according to the solar radiation amount, and the storage battery which charges the electric power generation electric current of the said solar cell, Based on the solar radiation amount, the stored energy of the said storage battery In the independent power supply apparatus that controls the operation of the load by the above, a control apparatus that detects the charging current to the storage battery and calculates the amount of solar radiation is provided.

また、請求項４に記載の本発明は、請求項３に記載の独立系電源装置において、前記制御装置は、前記蓄電池の過充電を検知して前記太陽電池と前記蓄電池の接続を遮断すると共に、前記太陽電池を発電電流検知用負荷に切り換えて接続する切換手段を備え、過充電検出時は前記発電電流検知用負荷を流れる電流を検知して日射量を算定することを特徴としている。   According to a fourth aspect of the present invention, in the independent power supply device according to the third aspect, the control device detects an overcharge of the storage battery and cuts off the connection between the solar battery and the storage battery. And a switching means for switching and connecting the solar cell to the generated current detection load, and when overcharge is detected, the current flowing through the generated current detection load is detected to calculate the amount of solar radiation.

ここで、請求項３に記載の構成では、発電時の太陽電池の発電電流を計測することにより日射量を算定することができるため、専用の日射センサは不要であり、コストダウンが図れる。   Here, in the configuration described in claim 3, since the amount of solar radiation can be calculated by measuring the generated current of the solar cell during power generation, a dedicated solar radiation sensor is unnecessary, and the cost can be reduced.

また、請求項４に記載の構成では、上記作用効果に加え、過充電により蓄電池への充電が停止されていても発電可能な日射が得られている間は日射量を継続して算定することができ、よって、日射量に応じた負荷の連続的な制御が可能となる。
また、この間、日射量算定のために消費される電力は、蓄電池への充電に供さない発電電力であり、太陽電池の発電を有効に利用したものである。 Moreover, in the structure of Claim 4, in addition to the said effect, it calculates continuously the amount of solar radiation while the solar radiation which can produce electric power is obtained even if the charge to a storage battery is stopped by overcharge. Therefore, continuous control of the load according to the amount of solar radiation becomes possible.
In addition, during this period, the power consumed for calculating the amount of solar radiation is generated power that is not used for charging the storage battery, and effectively uses the power generated by the solar battery.

本発明によれば、専用の日射センサを用いずに日射量を算定することができ、装置の低コスト化が図れる。
また、過充電により蓄電池への充電が停止されていても、発電可能な日射が得られている間は日射量を継続して算定することができ、よって、日射量に応じた負荷の連続的な制御が可能となる。例えば、負荷として、換気装置、遮光装置、冷房装置等の動作を制御すれば、建物内の温度環境を日射量に応じた適切な状態に保持することができる。 According to the present invention, the amount of solar radiation can be calculated without using a dedicated solar radiation sensor, and the cost of the apparatus can be reduced.
In addition, even if charging to the storage battery is stopped due to overcharging, the amount of solar radiation can be continuously calculated while solar radiation that can be generated is obtained, so that the load corresponding to the amount of solar radiation can be continuously calculated. Control is possible. For example, if the operation of a ventilation device, a light shielding device, a cooling device, or the like is controlled as a load, the temperature environment in the building can be maintained in an appropriate state according to the amount of solar radiation.

以下、本発明の独立系電源装置の一実施形態を図面に基づいて説明する。
図１は、本実施形態に係る独立系電源装置の回路構成を示し、図２、図３は太陽電池における日射量と発電電流の関係を示している。 Hereinafter, an embodiment of an independent power supply device of the present invention will be described with reference to the drawings.
FIG. 1 shows the circuit configuration of an independent power supply apparatus according to this embodiment, and FIGS. 2 and 3 show the relationship between the amount of solar radiation and the generated current in a solar cell.

図１に示すように、本実施形態の独立系電源装置は、日射量に応じた発電量を出力する太陽電池１と、この太陽電池１の発電電流を充電する蓄電池２と、建物設置負荷４（負荷４）への電力供給を制御する制御部３とを備えている。   As shown in FIG. 1, the independent power supply apparatus according to the present embodiment includes a solar cell 1 that outputs a power generation amount corresponding to the amount of solar radiation, a storage battery 2 that charges a power generation current of the solar cell 1, and a building installation load 4. And a control unit 3 that controls power supply to (load 4).

太陽電池１の正極（＋）と蓄電池２の正極（＋）の間には、切換手段５（切換スイッチ５）が介在され、太陽電池１の負極（−）と蓄電池２の負極（−）の間には、発電電流検知負荷７（抵抗７）が接続され、蓄電池２と負荷４の間には切断スイッチ６が介在されている。
上記切換スイッチ５は、太陽電池の（＋）出力を蓄電池２または抵抗７の何れかに切換えて接続するためのスイッチであり、上記切断スイッチ６は、負荷４への電力供給をオン／オフ制御するためのスイッチであり、且つ、これらスイッチ５、６の動作は制御部３の制御により行われるようになっている。この制御部３には、蓄電池２の充電電圧Ｖ１および抵抗７の両端電圧（負荷電圧）Ｖ２が入力されている。 Between the positive electrode (+) of the solar cell 1 and the positive electrode (+) of the storage battery 2, a switching means 5 (selection switch 5) is interposed between the negative electrode (−) of the solar battery 1 and the negative electrode (−) of the storage battery 2. A generated current detection load 7 (resistor 7) is connected between them, and a disconnect switch 6 is interposed between the storage battery 2 and the load 4.
The change-over switch 5 is a switch for switching and connecting the (+) output of the solar battery to either the storage battery 2 or the resistor 7, and the disconnect switch 6 controls on / off of power supply to the load 4. These switches 5 and 6 are controlled by the control unit 3. The control unit 3 is supplied with a charging voltage V1 of the storage battery 2 and a voltage (load voltage) V2 across the resistor 7.

上記負荷４は、例えば、建物内部に設置される空調装置や建物内外の通風を行う送風装置や建物の外部や内部に取り付けられる遮光装置等であり、蓄電池２から供給される直流電力で動作するもの、直流／交流変換器を通して交流電力にて動作するもの等が使用できる。発電時の日射量に応じて、これら負荷４の動作を制御することにより、建物内部の温度管理を行うことができる。   The load 4 is, for example, an air conditioner installed inside the building, a blower that ventilates inside or outside the building, a light shielding device attached to the outside or inside of the building, and the like, and operates with DC power supplied from the storage battery 2. Can be used, or can be operated with AC power through a DC / AC converter. By controlling the operation of these loads 4 according to the amount of solar radiation during power generation, the temperature inside the building can be managed.

上記構成の独立系電源装置においては、蓄電池２の充電電圧Ｖ１が所定電圧以下の場合には、切換スイッチ５の動作により太陽電池１と蓄電池２が接続されて充電経路が構成され、この充電経路を通して太陽電池１の発電電流が蓄電池２に充電されると共に、負荷４に対しては、切断スイッチ６を通して蓄電池２の充電電力が供給される。   In the independent power supply apparatus having the above configuration, when the charging voltage V1 of the storage battery 2 is equal to or lower than a predetermined voltage, the solar battery 1 and the storage battery 2 are connected by the operation of the changeover switch 5 to form a charging path. The generated electric current of the solar battery 1 is charged to the storage battery 2 through the charging battery 2, and the charging power of the storage battery 2 is supplied to the load 4 through the disconnect switch 6.

既述したように、負荷４の動作は発電時の日射量に応じてオン／オフ制御されるものであるが、この日射量は、充電中に発電電流検知用の抵抗７に太陽電池１の発電電流が流れることにより生じる電圧（両端電圧Ｖ２）より算出することができる。以下にその制御形態を説明する。   As described above, the operation of the load 4 is on / off controlled in accordance with the amount of solar radiation during power generation. This amount of solar radiation is connected to the resistor 7 for detecting the generated current during charging. It can be calculated from the voltage (both ends voltage V2) generated by the generation current flowing. The control mode will be described below.

ここで先ず、図２および図３について説明すれば、図２は蓄電池２に負荷４が接続されている時の日射量と発電電流の関係を示し、図３は蓄電池２と負荷４の接続が遮断されている時（後述する蓄電池の過充電検出時）の日射量と発電電流の関係を示している。また、図２、図３において、（イ）は充電中の特性を示し、（ロ）は、過充電により充電が停止されている時の特性を示している。各図より明らかなように、何れの場合も、太陽電池１における日射量と発電電流とは正の相関を示している。   First, FIG. 2 and FIG. 3 will be described. FIG. 2 shows the relationship between the amount of solar radiation and the generated current when the load 4 is connected to the storage battery 2, and FIG. 3 shows the connection between the storage battery 2 and the load 4. It shows the relationship between the amount of solar radiation and the generated current when it is shut off (when the overcharge of the storage battery described later is detected). 2 and 3, (a) shows characteristics during charging, and (b) shows characteristics when charging is stopped due to overcharging. As is clear from each figure, in any case, the solar radiation amount in the solar cell 1 and the generated current show a positive correlation.

従って、制御部３においては、入力された抵抗７の両端電圧Ｖ２より太陽電池１の発電電流を求めると共に、制御部内蔵の演算回路（図示せず）により、得られた発電電流を上記日射量−発電電流特性に基づいて日射量に換算する。制御部３は、算定した日射量を予め設定した基準値と比較し、日射量の多少に応じて切断スイッチ６をオン／オフすることにより負荷４の動作を制御する。
例えば、発電電流より算定した日射量が上記基準値を超えている場合は、負荷４への電力供給を開始して負荷を作動し、日射量が基準値以下の場合は、負荷４への電力供給を停止して負荷の動作を停止するように切断スイッチ６の動作を制御する。係る制御により、建物内部の好適な温度管理を行う。 Therefore, in the control part 3, while calculating | requiring the electric power generation current of the solar cell 1 from the both-ends voltage V2 of the input resistance 7, the generated electric current is calculated | required by the said solar radiation amount by the arithmetic circuit (not shown) built in the control part. -Convert to solar radiation based on the generated current characteristics. The control unit 3 compares the calculated amount of solar radiation with a preset reference value, and controls the operation of the load 4 by turning on / off the disconnect switch 6 according to the amount of solar radiation.
For example, when the amount of solar radiation calculated from the generated current exceeds the reference value, power supply to the load 4 is started to operate the load. When the amount of solar radiation is less than the reference value, the power to the load 4 is The operation of the disconnect switch 6 is controlled so that the supply is stopped and the operation of the load is stopped. With such control, suitable temperature management inside the building is performed.

蓄電池２への充電が進み、充電電圧Ｖ１が一定値以上に上昇した場合、制御部３は蓄電池２の過充電を検知し、過充電による蓄電池２の損傷や破裂を防止するために切換スイッチ５を抵抗７側へ切換え、太陽電池１から蓄電池２への充電経路を遮断する。   When charging of the storage battery 2 proceeds and the charging voltage V1 rises above a certain value, the control unit 3 detects the overcharge of the storage battery 2 and switches the changeover switch 5 to prevent damage or rupture of the storage battery 2 due to overcharge. Is switched to the resistance 7 side, and the charging path from the solar cell 1 to the storage battery 2 is interrupted.

従来装置では、太陽電池１と蓄電池２の充電経路が断たれた場合に日射量の算定ができなくなるという問題があったが、本発明では、過充電により充電経路が遮断された場合にも、その間の日射量の算定を継続可能にしている。   In the conventional device, there was a problem that the amount of solar radiation could not be calculated when the charging path of the solar cell 1 and the storage battery 2 was cut, but in the present invention, even when the charging path is cut off by overcharging, The calculation of solar radiation during that time can be continued.

すなわち、本実施形態では、充電が進んで蓄電池２の過電圧が検出された際に、切換スイッチ５を抵抗７側に切換えることにより、太陽電池（＋）〜抵抗７〜太陽電池（−）による発電電流のバイパス経路を構成し、その際の抵抗７の両端電圧Ｖ２に基づき、制御部３において日射量の演算を行うものである。尚、この場合の日射量の算定処理は、上記した充電時の場合と同様である。   That is, in this embodiment, when charging progresses and an overvoltage of the storage battery 2 is detected, the changeover switch 5 is switched to the resistor 7 side to generate power by the solar cell (+) to the resistor 7 to the solar cell (−). A current bypass path is configured, and the solar radiation amount is calculated in the control unit 3 based on the voltage V2 across the resistor 7 at that time. In addition, the calculation process of the solar radiation amount in this case is the same as that at the time of charge mentioned above.

このように、本発明では、過充電により蓄電池２への充電が停止されていても、バイパス経路を介して抵抗７に発電電流を流すことにより、発電可能な日射量が得られている間は制御部３において日射量を継続して算定することができ、よって、日射量に応じた負荷４の連続的な制御が可能となる。
例えば、負荷として、換気装置、遮光装置、冷房装置等の動作を制御すれば、蓄電池２の充電／過充電状態を問わず、常に建物内の温度環境を日射量に応じた適切な状態に保持することができる。加えて、この間、日射量の算定のために消費される電力は蓄電池２への充電に供さない発電電力であり、太陽電池１の発電電力を有効に利用したものである。 Thus, in the present invention, while the charging to the storage battery 2 is stopped due to overcharging, while the amount of solar radiation that can be generated is obtained by flowing the generated current through the resistor 7 via the bypass path, The control unit 3 can continuously calculate the amount of solar radiation, and therefore, the load 4 can be continuously controlled according to the amount of solar radiation.
For example, if the operation of a ventilator, light-shielding device, cooling device, etc. is controlled as a load, the temperature environment in the building is always kept in an appropriate state according to the amount of solar radiation, regardless of whether the storage battery 2 is charged or overcharged. can do. In addition, during this time, the power consumed for calculating the amount of solar radiation is generated power that is not used for charging the storage battery 2 and effectively uses the generated power of the solar battery 1.

また、本発明の構成では、負荷４を動作するための電力源である太陽電池１を日射センサとしても利用するため、日射量の算定に従来のような専用の日射センサを用いる必要は無くなり、よって、装置構成が簡略化し、低コスト化が図れる。   Further, in the configuration of the present invention, since the solar cell 1 that is a power source for operating the load 4 is also used as a solar radiation sensor, it is not necessary to use a conventional solar radiation sensor as in the conventional calculation for calculating the solar radiation amount. Therefore, the apparatus configuration can be simplified and the cost can be reduced.

本発明に係る独立系電源装置のブロック構成図。The block block diagram of the independent power supply device which concerns on this invention. 負荷接続時の太陽電池における日射量と発電電流の関係を示す図。The figure which shows the relationship between the solar radiation amount in the solar cell at the time of load connection, and generated electric current. 負荷接続を切断した時の太陽電池における日射量と発電電流の関係を示す図。The figure which shows the relationship between the solar radiation amount and generated electric current in a solar cell when a load connection is cut | disconnected.

符号の説明Explanation of symbols

１ 太陽電池
２ 蓄電池
３ 制御部
４ 負荷（建物設置負荷）
５ 切換手段（切換スイッチ）
６ 切断スイッチ
７ 発電電流検知用負荷（抵抗） DESCRIPTION OF SYMBOLS 1 Solar cell 2 Storage battery 3 Control part 4 Load (building installation load)
5 Switching means (switch)
6 Disconnect switch 7 Load for generating current detection (resistance)

Claims (4)

太陽電池に蓄電池を接続し、当該蓄電池の蓄積エネルギーにより負荷を動作するようにした独立系電源装置の制御方法であって、
前記蓄電池への充電電流より日射量を算定し、当該日射量に基づいて負荷の動作を制御することを特徴とする独立系電源装置の制御方法。 A method for controlling an independent power supply apparatus in which a storage battery is connected to a solar battery and a load is operated by stored energy of the storage battery.
A control method for an independent power supply device, wherein the amount of solar radiation is calculated from a charging current to the storage battery, and the operation of a load is controlled based on the amount of solar radiation. 前記蓄電池の過充電を検出すると、前記太陽電池と前記蓄電池の接続を遮断すると共に、前記大陽電池を発電電流検知用負荷に切り換えて接続し、当該発電電流検知用負荷を流れる電流より日射量を算定することを特徴とする請求項１に記載の独立系電源装置の制御方法。 When the overcharge of the storage battery is detected, the connection between the solar battery and the storage battery is cut off, and the Taiyo battery is switched to and connected to a generation current detection load, and the amount of solar radiation from the current flowing through the generation current detection load The method for controlling an independent power supply device according to claim 1, wherein: 日射量に応じた発電量を出力する太陽電池と、当該太陽電池の発電電流を充電する蓄電池とを備え、日射量に基づき、当該蓄電池の蓄積エネルギーにより負荷の動作を制御する独立系電源装置において、
前記蓄電池への充電電流を検知して前記日射量を算定する制御装置を備えることを特徴とする独立系電源装置。 In an independent power supply device that includes a solar battery that outputs a power generation amount according to the amount of solar radiation and a storage battery that charges the power generation current of the solar battery, and that controls the operation of the load by the stored energy of the storage battery based on the amount of solar radiation ,
An independent power supply device comprising: a control device that detects a charging current to the storage battery and calculates the amount of solar radiation. 前記制御装置は、前記蓄電池の過充電を検知して前記太陽電池と前記蓄電池の接続を遮断すると共に、前記太陽電池を発電電流検知用負荷に切り換えて接続する切換手段を備え、過充電検出時は前記発電電流検知用負荷を流れる電流を検知して日射量を算定することを特徴とする請求項３に記載の独立系電源装置。 The control device includes switching means for detecting overcharge of the storage battery and disconnecting the connection between the solar battery and the storage battery and switching the solar battery to a load for detecting a generated current, and when overcharge is detected. The independent power supply according to claim 3, wherein the amount of solar radiation is calculated by detecting a current flowing through the load for detecting the generated current.
JP2005040417A 2005-02-17 2005-02-17 Independent system power supply device and control method Pending JP2006230097A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012141091A1 (en) * 2011-04-11 2012-10-18 シャープ株式会社 Plant cultivation device, cultivation controller, cultivation control method and program therefor, and device for designing solar power generation device, method for designing solar power generation device and program therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012141091A1 (en) * 2011-04-11 2012-10-18 シャープ株式会社 Plant cultivation device, cultivation controller, cultivation control method and program therefor, and device for designing solar power generation device, method for designing solar power generation device and program therefor

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