JP3454114B2 - Home energy storage system - Google Patents
Home energy storage systemInfo
- Publication number
- JP3454114B2 JP3454114B2 JP29992197A JP29992197A JP3454114B2 JP 3454114 B2 JP3454114 B2 JP 3454114B2 JP 29992197 A JP29992197 A JP 29992197A JP 29992197 A JP29992197 A JP 29992197A JP 3454114 B2 JP3454114 B2 JP 3454114B2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- current
- storage system
- value
- 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 - Fee Related
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Selective Calling Equipment (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、宅内の全消費電流
を監視し、宅内の機器への給電を蓄電システムを用いて
切替供給することにより、全消費電流を所定の契約電流
以内に制限する家庭用蓄電システムに関する。
【０００２】
【従来の技術】従来は、宅内の全消費電流を監視し制限
するために、特開平6−38369号公報等に述べられている
が、特定機器の運転を停止したり、運転のモードを強制
的に切り換えて消費電流値を変えていた。
【０００３】
【発明が解決しようとする課題】係る方法では運転中の
機器の使用者の意志とは別に機器の運転状態が変更され
てしまうという事態が発生し、使い勝手が不十分なもの
であった。本発明では、運転中の機器の運転状態を変更
せずに宅内の使用電流が契約電流を超過しないように制
御する家庭用蓄電システムを提供することを目的とす
る。
【０００４】
【課題を解決するための手段】係る上記の目的を達成す
るために本発明では、家庭用蓄電システムを、家庭用ブ
レーカーの上流側若しくは下流側に電流検出手段を設
け、係る電流検出手段で検出した検出電流値が予め設定
した第１の設定値と一致または超えた場合に予め設定し
た所定負荷の電源給電を蓄電システムに切り換え、前記
電流検出手段での検出電流値を低下させて第１の設定値
以下にし、前記電流検出手段での検出電流値が予め設定
した第２の設定値と一致または下回った場合に前記所定
負荷の電源給電を蓄電システムから家庭用メインブレー
カーよりの給電に切り換えるように構成した。
【０００５】
【発明の実施の形態】以下、本発明の実施例を図１乃至
図７を用いて説明する。
【０００６】図１は本発明による１実施例のシステムの
全体構成を示すシステム構成図である。１は漏電ブレー
カーを兼ねた家庭用メインブレーカーであり、商用電源
の宅外からの引込線２と屋内電源線３ａが接続してあ
り、屋内電源線３ａは電流検出手段４を介して屋内分電
盤５に接続してある。
【０００７】屋内電源線３ａは屋内分電盤５の内部で内
蔵された系統別ブレーカーを介して、系統給電線６ａ，
６ｂ，６ｃ，６ｄ，６ｅ，６ｆに接続してあり、系統給
電線６ａ，６ｂ，６ｃには蓄電システム８の給電対象外
の負荷７ａ，７ｂ，７ｃ，７ｄ，７ｅ，７ｆ，７ｇ，７
ｈが接続してあり、系統給電線６ｄ，６ｅ，６ｆは前記
蓄電システム８に接続してある。電流検出手段４の検出
信号を伝達する検出電流伝達線９は前記蓄電システム８
に接続してある。
【０００８】蓄電システム８の制御対象となる給電線１
０ａ，１０ｂ，１０ｃは前記蓄電システム８と所定負荷
１１ａ，１１ｂ，１１ｃ，１１ｄ，１１ｅ，１１ｆ，１
１ｇとをそれぞれ接続してある。尚、給電線１０ａ，１
０ｂ，１０ｃの屋内での配線は通常の屋内系統別配線を
利用している。図３は蓄電システム８の内部構成を示す
ブロック図であり、系統給電線６ｄ，６ｅ，６ｆはそれ
ぞれ系統切換手段12ａ，１２ｂ，１２ｃを介し、更に負
荷電流検出手段１３ａ，１３ｂ，１３ｃを介して給電線
１０ａ，１０ｂ，１０ｃに接続してある。
【０００９】検出電流伝達線９は制御部１４に接続して
ある。系統給電線６ｆには電源スイッチ１５の一端が接
続してあり、該電源スイッチ１５の他端には直流変換装
置１６が接続してあり、該直流変換装置１６の出力は制
御部１４及び充電制御手段１７に接続してあり、それぞ
れに直流電源を供給している。電源スイッチ１５は蓄電
システム８を使用中は常時オンしている。
【００１０】充電制御手段１７の出力は２次電池で構成
した蓄電手段１８に接続してあり、蓄電手段１８の充電
を制御している。蓄電手段１８は放電制御手段１９に接
続してあり、放電制御手段１９は蓄電手段１８の放電を
制御している。該放電制御手段１９の出力はインバータ
２０に接続してあり、インバータ２０で直流を交流に変
換して、係るインバータ２０の出力は出力切換手段２１
ａ，２１ｂ，２１ｃを介して系統切換手段１２ａ，１２
ｂ，１２ｃの負荷側に接続してある。
【００１１】これらの充電制御手段１７，蓄電手段１
８，放電制御手段１９，インバータ２０はそれぞれ制御
部１４と接続してあり、制御部１４により動作制御，状
態管理をされている。系統切換手段１２ａ，１２ｂ，１
２ｃ及び出力切換手段２１ａ，２１ｂ，２１ｃの開閉動
作は制御部１４で制御している。系統切換手段１２ａ，
１２ｂ，１２ｃは商用電源給電時は常時オンしており、
出力切換手段２１ａ，２１ｂ，２１ｃは商用電源給電時
は常時オフしている。制御部１４にはメモリ手段２２が
内蔵してあり、各種データを記憶している。
【００１２】次に、係る構成の蓄電システム８の動作を
図２及び図４乃至図７を用いて説明する。図２は電流検
出手段４で検出された検出電流値２３の経過時間に対す
る変動を示したグラフであり、図中の電流値Ｉ１，Ｉ
２，Ｉ３はそれぞれ第１の制限電流設定値２４，第２の
制限電流設定値２５、及び第３の制限電流設定値２６を
示し、本実施例ではＩ１＞Ｉ２＞Ｉ３の大きさの関係に
なっている。また本実施例では第１の制限電流設定値２
４として当該家庭の契約電流値を用いている。
【００１３】図４は各給電線１０ａ，１０ｂ，１０ｃの
給電系統の時間変化の１例を示したチャートであり、２
７ａ，２７ｂ，２７ｃ，２７ｄ，２７ｅ，２７ｆは家庭
用メインブレーカー１を介して給電される商用電源での
給電期間を示し、２８ａ，２８ｂ，２８ｃは蓄電システ
ム８からの給電期間を示す。本実施例では商用電源での
給電から蓄電システム８での給電に切り換える優先順位
を給電線１０ａ＞給電線１０ｂ＞給電線１０ｃの順位と
している。
【００１４】図５は各給電線１０ａ，１０ｂ，１０ｃに
接続された所定負荷１１ａ，１１ｂ乃至１１ｄ，１１ｃ
乃至１１ｇのそれぞれの給電線別合計電流を示したもの
である。予め各給電線１０ａ，１０ｂ，１０ｃの定格電
流値２９ａ，２９ｂ，２９ｃをメモリ手段２２にデータ
設定してある。なお定格電流値２９ａ,２９ｂ,２９ｃは
変更可能な設定値である。
【００１５】各給電線１０ａ,１０ｂ,１０ｃの負荷電流
を負荷電流検出手段１３ａ，１３ｂ，１３ｃで検出した
現状値がそれぞれ３１ａ，３１ｂ，３１ｃであり、各給
電線１０ａ，１０ｂ，１０ｃに接続された所定負荷１１
ａ乃至１１ｇの運転状態により常時変動しており、それ
ぞれ最新値がメモリ手段２２に記憶されている。又、各
給電線１０ａ，１０ｂ，１０ｃの負荷電流の検出値の過
去の最大値はそれぞれ３０ａ，３０ｂ，３０ｃであり、
これらのデータは必要に応じて更新されメモリ手段２２
に記憶され常時保持されている。
【００１６】図６は電流検出手段４で検出した電流値が
第１の制限電流設定値２４以上になってから給電線１０
ａ，１０ｂ，１０ｃへの給電を商用電源から蓄電システ
ム８からの給電に切り換える処理を行うまでの遅延時間
３２のグラフであり、本実施例では第１の制限電流設定
値２４を超過した電流の大きさに応じて給電系切換のタ
イミングを変えている。
【００１７】図７は給電線１０ａ，１０ｂ，１０ｃへの
給電を商用電源または蓄電システム８のいずれかから行
うかを決める処理手順のフローチャートであり、この処
理は制御部１４で行う。
【００１８】本実施例では家庭用メインブレーカー１の
下流側に設置した電流検出手段４により宅内の全消費電
流を常時監視し、該電流検出手段４での検出電流値２３
が第１の制限電流値２４以上になったかどうをチェック
し（３３）、第１の制限電流設定値２４以上になったと
きは検出電流値２３が第１の制限電流設定値２４以上に
なった点３６から超過時間を計数し、超過時間が遅延時
間３２以上になったかどうかをチェックして（３７）超
過時間が遅延時間３２以上になった点３８で、負荷電流
の現状値３１ａ，３１ｂ，３１ｃを優先度の高い順に積
算した積算値が検出電流値２３の制限電流設定値２４と
の差分値以上になる範囲を蓄電システム８での給電への
切換対象として選定し(３９)、選定した切換対象が給電
線１０ａのみの場合は、系統切換手段１２ａをオフして
給電線１０ａへの商用電源の給電２７ａを停止して給電
停止期間を設け、前記系統切換手段１２ａをオフしてか
ら１ms乃至２０msの後に出力切換手段２１ａをオンして
給電線１０ａに蓄電システム８からの給電２８ａに切り
換えて（４０）検出電流値２３を減らした値４１にす
る。
【００１９】更に検出電流値２３が制限電流設定値２４
以上になった場合には、切換の優先度に応じて給電線１
０ｂ、給電線１０ｃの順に商用電源からの給電２７ｂ，
27ｃを給電線１０ａの切り換えと同様の手順で蓄電シス
テム８からの給電２８ｂ，２８ｃに切り換えて検出電流
値２３が制限電流設定値２４未満になるように、少なく
とも１つ以上の給電線への給電を蓄電システム８からの
給電に切り換える。切換の優先度は自由に設定できるよ
うにしてある。なお、切り換える対象の給電線は予め設
定した優先度と、温度，時刻，月日，検出電流値２３の
大きさの何れか１つ以上の条件で自動設定しても良い。
【００２０】電流検出手段４での検出電流値２３が第１
の制限電流設定値２４未満になったら、検出電流値２３
が第２の制限電流設定値２５以下かどうかをチェックし
(42)、宅内の負荷７ａ乃至７ｈの状態変化により電流検
出手段４での検出電流値２３が第２の制限電流設定値２
５以下になった場合には、検出電流値２３が第２の制限
電流設定値２５以下になった点４３から所定時間以上経
過した点４４で蓄電システム８から給電している給電線
がある場合にはその優先度の低い方からそれらの過去の
最大電流値３０ａ，３０ｂ，３０ｃを積算してその積算
値が、検出電流値２３の第２の制限電流設定値２５との
差分とを比較して小さい範囲で商用電源での給電に切り
換える対象を１つ以上選定し（４５）、切換対象が給電
線１０ａのみの場合には、出力切換手段２１ａをオフし
た後１ms乃至２０ms経過後に系統切換手段１２ａをオン
して、給電線１０ａへの蓄電システム８からの給電２８
ａを商用電源からの給電２７ｄに切り換える（４６）。
なお、このとき積算する値はこの場合に定格電流値２９
ａ，２９ｂ，２９ｃでもよい。
【００２１】給電線１０ｂ，１０ｃも蓄電システム８か
ら給電されているときは、優先度の低い給電線１０ｃ，
１０ｂ，１０ａの順に商用電源からの給電に切り換える
ようにしている。給電線１０ａまたは１０ｂまたは１０
ｃを切り換えることにより検出電流値２３は増加した点
４７になる。
【００２２】次に検出電流値２３が第３の制限電流設定
値２６以下かどうかをチェックし（４８）、検出電流値
２３が第３の制限電流設定値２６以下である場合には、
蓄電手段１８の端子電圧が所定の電圧以下で充電可能か
どうかをチェックし(４９)、蓄電手段１８の端子電圧が
所定電圧以下であれば充電し（５０）、その後に蓄電手
段１８の充電が終了したかどうかを端子電圧や充電電
流，積算充電量，充電時間等によりチェックし（５
１）、次の処理に移る。
【００２３】また、検出電流値２３が第３の制限電流設
定値２６より大きいときには、蓄電システム８が充電中
かどうかをチェックし（５２）、充電中の場合には直ち
に充電を終了する（５３）。なお、蓄電システム８の充
電時の動作は、系統給電線６ｆより電源スイッチ１５を
介して商用電源が直流変換装置１６に供給され、該直流
変換装置１６は商用電源を整流・平滑するとともに出力
を所定の直流電圧に安定化する。係る直流電圧を充電制
御手段１７でスイッチング及びレベル変換することによ
り、蓄電手段１８の充電のオン・オフ、充電電圧，充電
電流等を制御して適正充電を行う。
【００２４】該蓄電システム８の放電は、蓄電手段１８
の放電のオン・オフ、放電電流を放電制御手段１９で制
御し、係る蓄電手段１８の直流出力をインバータ２０に
より商用周波数の交流に変換するとともに交流出力電圧
を安定化する。係る交流出力を出力切換手段２１ａ，２
１ｂ，２１ｃを介して給電線１０ａ，１０ｂ，１０ｃに
供給する。
【００２５】本実施例の家庭用蓄電システムは停電時に
は停電対応機能を有し、検出電流値２３が０若しくは０
に近い値になった場合には停電とみなし、１ms乃至２０
ms以内の時間で系統切換手段１２ａ，１２ｂ，１２ｃを
オフするとともに出力切換手段２１ａ，２１ｂ，２１ｃ
をオンし、給電線１０ａ，１０ｂ，１０ｃに給電する。
更に所定時間経過しても検出電流値２３が所定の値以上
にならない場合には予め最優先給電対象負荷として設定
した例えば給電線１０ｃへの給電のみを継続して他の給
電線への給電を停止し、最優先給電対象への給電時間を
延長できるようにしている。
【００２６】
【発明の効果】本発明では家庭用メインブレーカーの上
流側若しくは下流側に電流検出手段を設け、係る電流検
出手段で検出した検出電流値が予め設定した第１の制限
電流設定値と一致または超えた場合に予め設定した所定
負荷の電源供給を蓄電システムに切り換え、前記電流検
出手段での検出電流値を低下させて第１の制限電流設定
値以下にし、前記電流検出手段での検出電流値が予め設
定した第２の制限電流設定値と一致または下回った場合
に前記所定負荷の電源給電を蓄電システムから家庭用メ
インブレーカーよりの給電に切り換えるように構成した
ので、家庭内の消費電流が契約電流を一時的に上回って
も家庭内の運転中の機器を停止したり運転モードを勝手
に変更することなく家庭内の消費電流を契約電流以内に
抑えてメインブレーカーの動作による停電を未然に防止
できる。
【００２７】また家庭内消費電流が契約電流を超過しそ
うなときにだけ蓄電システムから給電するので蓄電手段
を小さくできる。また、給電を切り換える対象となる所
定負荷として複数の機器を設定できるようにしたので、
家庭内の消費電流の大きさに応じて蓄電システムから給
電する対象を適宜選定でき、対応できる検出電流値の範
囲を大きくできるとともに、蓄電システムの蓄電容量を
軽減できる。
【００２８】また、給電を切り換える対象となる所定負
荷の切換優先順序を設定できるようにしたので、給電元
を切り換えても不具合が出にくい機器や運転率の高い機
器などを優先的に切り換える等の対応ができ、蓄電シス
テムの安定な動作を図れる。
【００２９】また、各所定負荷の運転電流を検知する負
荷電流検出手段を各々設け、係る負荷電流検出手段の負
荷電流値と、電流検出手段の検出電流値と第１の制限電
流設定値若しくは第２の制限電流設定値との差分とを比
較し、家庭用メインブレーカーからの給電と蓄電システ
ムからの給電とを切り換える対象負荷を１つ以上選定し
設定するようにしたので、検出電流の大きさに応じて給
電を切り換える対象負荷を負荷電流の大きさにより１つ
以上適宜選定して給電切り換えを行え、家庭用メインブ
レーカーをオフさせることなく給電切り換えを実施でき
る。
【００３０】また、各負荷電流値の現状値と、過去の最
大値と、予め設定した値若しくは変更可能な設定値とを
記憶するメモリ手段を設け、電流検出手段で検出した検
出電流値が予め設定した第１の制限電流設定値以上にな
ったときに所定負荷への給電を蓄電システムからの給電
に切り換える対象の範囲を前記負荷電流値の現状値の値
より選定するとともに、前記検出電流値が第２の制限電
流設定値以下になったときに所定負荷への給電を蓄電シ
ステムから家庭用メインブレーカーに切り換える対象の
範囲を前記負荷電流値の過去の最大値と予め設定した値
若しくは変更可能な設定値との何れかの値により選定す
るようにしたので、家庭内の消費電流が過大になったと
きの給電切換対象を現時点の負荷電流で選定して速やか
に家庭用メインブレーカーに流れる消費電流を契約電流
以内に設定できる。
【００３１】また、所定負荷への給電を蓄電システムか
ら家庭用メインブレーカーに戻すときにも契約電流を超
過する恐れがなくなる。また、蓄電システムの蓄電手段
として２次電池を用い、係る蓄電手段の端子電圧が予め
設定した所定電圧よりも低く、且つ電流検出手段で検出
した検出電流値が予め設定した第３の制限電流設定値よ
りも低い時にのみ蓄電手段に充電するようにしたので、
２次電池の電圧が充電可能なレベルで且つ家庭内消費電
流が契約電流に対して十分に余裕があるときに充電を確
実に行え、家庭用メインブレーカーが動作する恐れがな
い。
【００３２】また、所定負荷への給電を、家庭用メイン
ブレーカーからの給電と蓄電システムからの給電とで切
り換える時に、家庭用メインブレーカーからの給電と蓄
電システムからの給電との両方を停止した期間を設けた
ことにより、蓄電システムから商用電源側に電流が流れ
込む逆潮流を発生させる恐れがない。
【００３３】また、気温，時刻，月日，電流検出手段に
より検出された検出電流値，切換優先順序の何れか１つ
以上の条件により所定負荷の切換順序を自動設定するよ
うにすることにより、ルームエアコンのような季節や時
刻や気温で運転状況が概ね決まるような負荷の運転電流
や使用状況を大凡推定でき、蓄電システムで給電する対
象負荷の選定と切換タイミングを蓄電システムの負担が
少なくなるように設定できる。
【００３４】また、所定負荷の内の１つまたは１給電線
を最優先給電対象負荷として設定でき、電流検出手段に
より所定時間以上の間停電を検出した場合に前記最優先
給電対象負荷へのみ給電を行うようにしたので、停電が
長時間になりそうな場合に給電対象を照明などの非常時
に通電すべき負荷に限定して長時間給電することがで
き、夜間等の停電時に非常に有効なシステムを提供でき
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention monitors the total current consumption in a house, and switches the power supply to the equipment in the house by using a power storage system to provide a total power consumption. The present invention relates to a home power storage system that limits a current within a predetermined contract current. 2. Description of the Related Art Conventionally, in order to monitor and limit the total current consumption in a house, it is described in Japanese Patent Application Laid-Open No. Hei 6-38369. The mode was forcibly switched to change the current consumption value. [0003] In such a method, a situation occurs in which the operating state of the equipment is changed independently of the intention of the user of the equipment during operation, and the usability is insufficient. Was. SUMMARY OF THE INVENTION It is an object of the present invention to provide a household power storage system that controls a current used in a house so as not to exceed a contract current without changing an operation state of a device in operation. In order to achieve the above object, according to the present invention, a home power storage system is provided with current detection means provided upstream or downstream of a home circuit breaker. When the detected current value detected by the means matches or exceeds a first set value set in advance, the power supply to a predetermined load is switched to a power storage system, and the detected current value in the current detecting means is reduced. When the current value detected by the current detection means is equal to or less than a second set value set to be equal to or less than a first set value, power supply to the predetermined load is supplied from a power storage system to a home main breaker. It was configured to switch to. An embodiment of the present invention will be described below with reference to FIGS. 1 to 7. FIG. 1 is a system configuration diagram showing the overall configuration of a system according to an embodiment of the present invention. Reference numeral 1 denotes a main breaker for household use which also serves as an earth leakage breaker. A lead-in line 2 from the outside of the commercial power supply is connected to an indoor power supply line 3a, and the indoor power supply line 3a is connected to an indoor distribution board via a current detecting means 4. 5 is connected. The indoor power supply line 3a is connected to a system power supply line 6a, via a system-specific circuit breaker built in the indoor distribution board 5.
6b, 6c, 6d, 6e, and 6f, and loads 7a, 7b, 7c, 7d, 7e, 7f, 7g, and 7 that are not supplied to the power storage system 8 are connected to the system power supply lines 6a, 6b, and 6c.
h is connected, and the system power supply lines 6d, 6e, 6f are connected to the power storage system 8. The detection current transmission line 9 for transmitting the detection signal of the current detection means 4 is connected to the power storage system 8.
Connected to Power supply line 1 to be controlled by power storage system 8
Reference numerals 0a, 10b, and 10c denote the power storage system 8 and predetermined loads 11a, 11b, 11c, 11d, 11e, 11f, and 1 respectively.
1g are connected to each other. The power supply lines 10a, 1
The indoor wiring of 0b and 10c uses normal indoor system wiring. FIG. 3 is a block diagram showing the internal configuration of the power storage system 8. The system power supply lines 6d, 6e, and 6f are provided via system switching means 12a, 12b, and 12c, respectively, and further via load current detection means 13a, 13b, and 13c. It is connected to power supply lines 10a, 10b, 10c. The detected current transmission line 9 is connected to a control unit 14. One end of a power switch 15 is connected to the system power supply line 6f, and a DC converter 16 is connected to the other end of the power switch 15. The output of the DC converter 16 is controlled by the control unit 14 and the charge control unit. It is connected to means 17 and supplies DC power to each of them. The power switch 15 is always on while the power storage system 8 is in use. The output of the charge control means 17 is connected to a power storage means 18 composed of a secondary battery, and controls charging of the power storage means 18. The power storage means 18 is connected to the discharge control means 19, and the discharge control means 19 controls the discharge of the power storage means 18. The output of the discharge control means 19 is connected to an inverter 20. The inverter 20 converts DC to AC, and the output of the inverter 20 is output to an output switching means 21.
a, 21b, and 21c through the system switching means 12a, 12
b, 12c are connected to the load side. These charge control means 17 and power storage means 1
8, the discharge control means 19, and the inverter 20 are connected to the control unit 14, and the control unit 14 controls the operation and manages the state. System switching means 12a, 12b, 1
The control unit 14 controls the opening and closing operations of the 2c and the output switching means 21a, 21b, 21c. System switching means 12a,
12b and 12c are always on when commercial power is supplied,
The output switching means 21a, 21b, 21c are always off when the commercial power is supplied. The control unit 14 has a built-in memory means 22 and stores various data. Next, the operation of the power storage system 8 having such a configuration will be described with reference to FIGS. 2 and 4 to 7. FIG. 2 is a graph showing the variation of the detected current value 23 detected by the current detecting means 4 with respect to the elapsed time.
Reference numerals 2 and I3 denote a first limit current set value 24, a second limit current set value 25, and a third limit current set value 26, respectively. In the present embodiment, the relationship of magnitude of I1>I2> I3 is satisfied. Has become. In this embodiment, the first limit current set value 2
As 4, the contract current value of the home is used. FIG. 4 is a chart showing an example of a time change of the power supply system of each of the power supply lines 10a, 10b and 10c.
Reference numerals 7a, 27b, 27c, 27d, 27e, and 27f denote power supply periods using a commercial power supply supplied via the home main breaker 1, and reference numerals 28a, 28b, and 28c denote power supply periods from the power storage system 8. In the present embodiment, the order of priority for switching from the power supply by the commercial power supply to the power supply by the power storage system 8 is the order of the power supply line 10a> the power supply line 10b> the power supply line 10c. FIG. 5 shows predetermined loads 11a, 11b to 11d, 11c connected to the respective feeder lines 10a, 10b, 10c.
9 shows the total current of each of the feeder lines from 1 to 11 g. The rated current values 29a, 29b, and 29c of the power supply lines 10a, 10b, and 10c are set in the memory means 22 in advance. The rated current values 29a, 29b, 29c are set values that can be changed. The current values detected by the load current detecting means 13a, 13b, and 13c of the load currents of the power supply lines 10a, 10b, and 10c are 31a, 31b, and 31c, respectively, and are connected to the power supply lines 10a, 10b, and 10c, respectively. Predetermined load 11
The values are constantly fluctuating depending on the operating conditions a to 11g, and the latest values are stored in the memory means 22. The past maximum values of the detected load current values of the power supply lines 10a, 10b, and 10c are 30a, 30b, and 30c, respectively.
These data are updated as necessary and stored in the memory unit 22.
And is always held. FIG. 6 shows the power supply line 10 after the current value detected by the current detecting means 4 becomes equal to or more than the first limit current set value 24.
6 is a graph of a delay time 32 until a process of switching power supply to the power supply to the power supply to the power supply from the commercial power supply to the power supply from the power storage system 8 is performed. The timing of switching the power supply system is changed according to the size. FIG. 7 is a flowchart of a processing procedure for determining whether to supply power to the power supply lines 10a, 10b, and 10c from the commercial power supply or the power storage system 8. This processing is performed by the control unit 14. In this embodiment, the total current consumption in the house is constantly monitored by the current detecting means 4 installed on the downstream side of the home main breaker 1, and the detected current value of the current detecting means 4 is 23.
(33) is checked to determine whether the detected current value 23 is equal to or greater than the first limited current value 24. The excess time is counted from the point 36, and it is checked whether the excess time has exceeded the delay time 32. (37) At the point 38 where the excess time has exceeded the delay time 32, the current values 31a and 31b of the load currents , 31c is selected as a target to be switched to the power supply in the power storage system 8 (39), and a range in which the integrated value obtained by integrating the priority order from the highest priority to the difference value of the detected current value 23 with the limit current setting value 24 is selected. When only the power supply line 10a is to be switched, the system switching means 12a is turned off to stop the power supply 27a of the commercial power supply to the power supply line 10a to provide a power supply stop period, and then the system switching means 12a is turned off. 1ms to 20ms To a value 41 with reduced output switching means 21a is switched to the power supply 28a from the power storage system 8 ON to the feed line 10a (40) the detected current value 23. Further, the detected current value 23 is equal to the limit current set value 24.
If this is the case, the feeder line 1 is switched according to the switching priority.
0b, the power supply line 10c, and the power supply 27b,
27c is switched to the power supply 28b, 28c from the power storage system 8 in the same procedure as the switching of the power supply line 10a, and power is supplied to at least one or more power supply lines so that the detected current value 23 becomes less than the limit current set value 24. Is switched to the power supply from the power storage system 8. The switching priority can be freely set. The power supply line to be switched may be automatically set based on a preset priority and at least one of the following conditions: temperature, time, date, and magnitude of the detected current value 23. The current value 23 detected by the current detecting means 4 is equal to the first current value.
Is smaller than the limit current set value 24, the detected current value 23
Is less than or equal to the second limit current set value 25.
(42) The detected current value 23 of the current detecting means 4 is changed to the second limited current set value 2 by the state change of the loads 7a to 7h in the house.
In the case where the power supply line is supplied with power from the power storage system 8 at a point 44 which has passed a predetermined time or more from the point 43 where the detected current value 23 has become equal to or less than the second limit current set value 25, , The past maximum current values 30a, 30b, and 30c are integrated from the lower priority, and the integrated value is compared with the difference between the detected current value 23 and the second limit current set value 25. One or more objects to be switched to the commercial power supply within a small range are selected (45), and when only the power supply line 10a is to be switched, the system switching means 1 to 20 ms after the output switching means 21a is turned off. Turn on the power supply line 12a to supply power from the power storage system 8 to the power supply line 10a.
a is switched to the power supply 27d from the commercial power supply (46).
The value integrated at this time is the rated current value 29 in this case.
a, 29b, and 29c. When the power supply lines 10b and 10c are also supplied with power from the power storage system 8, the lower priority power supply lines 10c and 10c are used.
Switching to power supply from a commercial power supply is performed in the order of 10b and 10a. Power supply line 10a or 10b or 10
By switching c, the detected current value 23 becomes an increased point 47. Next, it is checked whether the detected current value 23 is equal to or less than the third limit current set value 26 (48). If the detected current value 23 is equal to or smaller than the third limit current set value 26,
It is checked whether or not the terminal voltage of the power storage means 18 can be charged below a predetermined voltage (49). If the terminal voltage of the power storage means 18 is lower than the predetermined voltage, charging is performed (50). It is checked whether or not the operation has been completed based on the terminal voltage, charging current, accumulated charge amount, charging time, etc. (5.
1) Move to the next process. When the detected current value 23 is larger than the third limit current set value 26, it is checked whether or not the power storage system 8 is being charged (52). If it is, the charging is immediately terminated (53). ). The operation of the power storage system 8 during charging is such that commercial power is supplied from the system power supply line 6f to the DC converter 16 via the power switch 15, and the DC converter 16 rectifies and smoothes the commercial power and outputs an output. Stabilizes to a predetermined DC voltage. By switching and level-converting the DC voltage by the charge control unit 17, ON / OFF of charging of the power storage unit 18, charging voltage, charging current, and the like are controlled to perform appropriate charging. The discharging of the power storage system 8 is performed by the power storage means 18.
The on / off of the discharge and the discharge current are controlled by the discharge control means 19, and the DC output of the power storage means 18 is converted to AC of commercial frequency by the inverter 20 and the AC output voltage is stabilized. Such AC output is output to output switching means 21a, 2
The power is supplied to power supply lines 10a, 10b, and 10c via 1b and 21c. The home power storage system of this embodiment has a power failure response function when a power failure occurs, and the detected current value 23 is 0 or 0.
If the value is close to
The system switching means 12a, 12b, 12c are turned off within a time of less than ms, and the output switching means 21a, 21b, 21c are turned off.
Is turned on to supply power to the power supply lines 10a, 10b, and 10c.
Further, when the detected current value 23 does not become equal to or more than the predetermined value even after the predetermined time elapses, only the power supply to the power supply line 10c, which is set in advance as the highest priority power supply target load, is continued to supply power to the other power supply lines. The system is stopped and the power supply time to the highest priority power supply target can be extended. According to the present invention, a current detecting means is provided on the upstream or downstream side of the home main breaker, and the detected current value detected by the current detecting means is equal to a preset first limited current set value. In the case of a match or exceeding, the power supply of a predetermined load set in advance is switched to the power storage system, the detected current value of the current detecting means is reduced to a value equal to or less than the first limited current set value, and the detection by the current detecting means is performed. When the current value matches or falls below a preset second limit current set value, the power supply of the predetermined load is switched from the power storage system to the power supply from the home main breaker. Even if the current temporarily exceeds the contract current, the current consumption in the home can be kept within the contract current without stopping the running equipment in the home or changing the operation mode without permission Thus, a power failure due to the operation of the main breaker can be prevented. Further, since power is supplied from the power storage system only when the current consumption in the house is likely to exceed the contract current, the size of the power storage means can be reduced. In addition, since a plurality of devices can be set as a predetermined load to which power supply is switched,
An object to be supplied with power from the power storage system can be appropriately selected according to the amount of current consumption in the home, and the range of the detected current value that can be supported can be increased, and the power storage capacity of the power storage system can be reduced. Further, since the switching priority order of the predetermined load for which the power supply is to be switched can be set, it is possible to preferentially switch a device which hardly causes a problem even when the power supply source is switched, a device having a high operation rate, and the like. Respond, and stable operation of the power storage system can be achieved. Further, load current detecting means for detecting the operating current of each predetermined load is provided, and the load current value of the load current detecting means, the detected current value of the current detecting means and the first limited current setting value or the first limited current setting value are set. 2 is compared with the limit current set value, and one or more target loads for switching between the power supply from the home main breaker and the power supply from the power storage system are selected and set. The power supply can be switched by appropriately selecting one or more target loads for which the power supply is switched according to the magnitude of the load current, and the power supply can be switched without turning off the home main breaker. Further, a memory means for storing a current value of each load current value, a past maximum value, a preset value or a changeable set value is provided, and the detected current value detected by the current detecting means is stored in advance. When the power supply to the predetermined load is switched to the power supply from the power storage system when the power supply voltage becomes equal to or more than the set first limit current set value, a target range of the load current value is selected from the current value of the load current value. When the power supply to a predetermined load is switched from the power storage system to the home main breaker when the power supply voltage becomes equal to or less than the second limit current set value, the past maximum value of the load current value and a preset value or changeable. The power supply switching target when the current consumption in the home becomes excessive is selected based on the current load current, and the home mains branch is promptly selected. The consumption current flowing through the manufacturers can be set within the contract current. Further, even when the power supply to the predetermined load is returned from the power storage system to the home main breaker, there is no possibility that the contract current will be exceeded. In addition, a secondary battery is used as the power storage means of the power storage system, the terminal voltage of the power storage means is lower than a predetermined voltage set in advance, and the detection current value detected by the current detection means is set to a predetermined third limit current setting. Since the power storage means is charged only when the value is lower than the value,
When the voltage of the secondary battery is at a chargeable level and the current consumption in the home has a sufficient margin with respect to the contract current, the charging can be reliably performed, and the home main breaker does not operate. When the power supply to the predetermined load is switched between the power supply from the home main breaker and the power supply from the power storage system, a period in which both the power supply from the home main breaker and the power supply from the power storage system are stopped. Is provided, there is no possibility of generating a reverse power flow in which current flows from the power storage system to the commercial power supply. Further, by automatically setting the switching order of the predetermined load according to at least one of the following conditions: temperature, time, month, day, current value detected by the current detecting means, and switching priority order. The operating current and usage of a load such as a room air conditioner whose operating status is largely determined by the season, time, and temperature can be roughly estimated, and the load on the power storage system to select and switch the load to be supplied by the power storage system is reduced. It can be set as follows. Further, one or one of the predetermined loads can be set as the highest priority power supply target load, and only when the power failure is detected by the current detecting means for a predetermined time or more, power is supplied only to the highest priority power supply target load. When power outages are likely to be prolonged, power can be supplied for a long time by limiting the power supply to the load that should be energized in the event of an emergency such as lighting. System can be provided.
【図面の簡単な説明】
【図１】本発明の１実施例である家庭用蓄電システム構
成図である。
【図２】電流検出手段４で検出された検出電流値２３の
経過時間に対する変動を示したグラフである。
【図３】蓄電システム８の内部構成を示すブロック図で
ある。
【図４】各給電線１０ａ，１０ｂ，１０ｃの給電系統の
時間変化の１例を示したチャートである。
【図５】各給電線に接続された所定負荷の給電線別合計
電流を示した図である。
【図６】電流検出手段４で検出した検出電流と超過時間
との関係を示すグラフである。
【図７】給電線１０ａ，１０ｂ，１０ｃへの給電を商用
電源または蓄電システム８を行う処理手順のフローチャ
ートである。
【符号の説明】
１…家庭用メインブレーカー、４…電流検出手段、８…
蓄電システム、１１ａ〜１１ｇ…所定負荷、２３…検出
電流値、２４…第１の制限電流設定値、２５…第２の制
限電流設定値。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a home power storage system according to an embodiment of the present invention. FIG. 2 is a graph showing a variation of a detection current value 23 detected by a current detection unit 4 with respect to an elapsed time. FIG. 3 is a block diagram showing an internal configuration of a power storage system 8. FIG. 4 is a chart showing an example of a temporal change of a power supply system of each of the power supply lines 10a, 10b, and 10c. FIG. 5 is a diagram showing a total current for each power supply line of a predetermined load connected to each power supply line. FIG. 6 is a graph showing a relationship between a detection current detected by a current detection unit 4 and an excess time. FIG. 7 is a flowchart of a processing procedure for supplying power to the power supply lines 10a, 10b, and 10c by using a commercial power supply or the power storage system 8. [Description of Signs] 1 ... Home main breaker, 4 ... Current detection means, 8 ...
Power storage systems, 11a to 11g: predetermined load, 23: detected current value, 24: first limit current set value, 25: second limit current set value.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平９−261894（ＪＰ，Ａ) 特開 昭49−8731（ＪＰ，Ａ) 特開 平６−38369（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02J 3/00 - 5/00 H02J 7/34 - 7/35 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-261894 (JP, A) JP-A-49-8873 (JP, A) JP-A-6-38369 (JP, A) (58) Field (Int.Cl. 7 , DB name) H02J 3/00-5/00 H02J 7/34-7/35
Claims (1)
下流側に電流検出手段を設け、係る電流検出手段で検出
した検出電流値が予め設定した第１の制限電流設定値と
一致または超えた場合に予め設定した所定負荷の電源給
電を蓄電システムに切り換え、前記電流検出手段での検
出電流値を低下させて第１の制限電流設定値以下にし、
前記電流検出手段での検出電流値が予め設定した第２の
制限電流設定値と一致または下回った場合に前記所定負
荷の電源給電を蓄電システムから家庭用メインブレーカ
ーよりの給電に切り換えるように構成したことを特徴と
する家庭用蓄電システム。(57) [Claim 1] A current detecting means is provided upstream or downstream of a home main breaker, and the detected current value detected by the current detecting means is set to a preset first limited current. When the current value coincides with or exceeds the set value, the power supply of a predetermined load that is set in advance is switched to the power storage system, and the current value detected by the current detecting unit is reduced to be equal to or less than the first current limit value.
The power supply of the predetermined load is switched from a power storage system to a power supply from a home main breaker when a current value detected by the current detection means matches or falls below a preset second limit current value. A home power storage system characterized by the above-mentioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29992197A JP3454114B2 (en) | 1997-10-31 | 1997-10-31 | Home energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29992197A JP3454114B2 (en) | 1997-10-31 | 1997-10-31 | Home energy storage system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11136866A JPH11136866A (en) | 1999-05-21 |
| JP3454114B2 true JP3454114B2 (en) | 2003-10-06 |
Family
ID=17878544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29992197A Expired - Fee Related JP3454114B2 (en) | 1997-10-31 | 1997-10-31 | Home energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3454114B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2474305A (en) * | 2009-10-09 | 2011-04-13 | Siemens Plc | Smoothing domestic electricity consumption using an electricity storage device |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009095114A (en) * | 2007-10-05 | 2009-04-30 | Sumitomo Electric Ind Ltd | Power storage apparatus |
| EP2487769B1 (en) | 2009-10-05 | 2015-11-25 | Toyota Jidosha Kabushiki Kaisha | Specification selection device of power storage system and specification selection method of power storage system |
| JP5497397B2 (en) * | 2009-10-05 | 2014-05-21 | パナソニック株式会社 | Power supply system |
| JP2011130649A (en) * | 2009-12-21 | 2011-06-30 | Panasonic Electric Works Co Ltd | Electric power supply system |
| EP2521238B1 (en) | 2009-12-28 | 2014-11-12 | Toyota Jidosha Kabushiki Kaisha | Household electricity storage system |
| WO2011080813A1 (en) | 2009-12-28 | 2011-07-07 | トヨタ自動車株式会社 | Household electricity storage system |
| JP5739112B2 (en) * | 2010-04-28 | 2015-06-24 | 株式会社エヌエフ回路設計ブロック | Intelligent distribution board, distribution device, power failure countermeasure system, and distribution method |
| KR101283652B1 (en) * | 2012-02-22 | 2013-07-08 | 한일전기엠엠씨 주식회사 | Prevention device of the shut off overload and supply power and method thereof |
| JP5962095B2 (en) * | 2012-03-16 | 2016-08-03 | 日本電気株式会社 | Power control system, management device for power control, and power control method |
| CN103683283B (en) * | 2013-12-24 | 2016-08-17 | 中国西电电气股份有限公司 | A kind of method and system of micro-grid system seamless switching |
| JP6328020B2 (en) * | 2014-09-26 | 2018-05-23 | シャープ株式会社 | Power control system, control device, and power control method |
-
1997
- 1997-10-31 JP JP29992197A patent/JP3454114B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2474305A (en) * | 2009-10-09 | 2011-04-13 | Siemens Plc | Smoothing domestic electricity consumption using an electricity storage device |
| GB2474305B (en) * | 2009-10-09 | 2012-08-01 | Siemens Plc | Device and method for smoothing domestic electricity consumption |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11136866A (en) | 1999-05-21 |
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