JP4311969B2 - Distribution board system - Google Patents

Distribution board system Download PDF

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Publication number
JP4311969B2
JP4311969B2 JP2003117905A JP2003117905A JP4311969B2 JP 4311969 B2 JP4311969 B2 JP 4311969B2 JP 2003117905 A JP2003117905 A JP 2003117905A JP 2003117905 A JP2003117905 A JP 2003117905A JP 4311969 B2 JP4311969 B2 JP 4311969B2
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Japan
Prior art keywords
power source
breaker
distributed power
distributed
flow
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JP2003117905A
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JP2004328856A (en
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郁夫 北原
洋二 堀尾
健次 田中
吏司 曽我
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Nitto Kogyo Corp
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Nitto Kogyo Corp
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【０００１】
【発明の属する技術分野】
本発明は、太陽光発電システムやガス発電システムなどの分散電源に対応させた分電盤システムに関するものである。
【０００２】
【従来の技術】
【特許文献１】
特開平１０−２８５７１９号公報
【０００３】
太陽光発電システムを備えた住宅には、従来からこれに対応した住宅用の分電盤システムが用いられている。これは特許文献１に示すように、主幹ブレーカに接続された主幹バーの端部に太陽光発電用のブレーカを接続したものである。この分電盤システムには、商用電源によって電力が供給されるとともに、分散電源である太陽光発電システムの稼動によっても電力が供給される。太陽光発電システムによる電力が分岐ブレーカに接続された負荷が消費する電力を上回るときには、主幹ブレーカを通じて商用電源側に電力を逆潮流させ、売電ができるようになっている。
【０００４】
また最近では、給湯と発電の両方が可能なガス発電システム（コージェネシステム）も家庭に普及しつつあり、このガス発電システムに対応した分電盤システムも用いられている。しかし前記の太陽光発電システムとは異なり、現状ではガス発電電力は売電することができないこととなっている。このため主幹ブレーカに接続された主幹バーの端部にガス発電用のブレーカを接続するとともに、主幹ブレーカの上側に逆潮流検出用の電流センサーを設け、ガス発電システムによる電力が負荷消費電力を上回り逆潮流が検出された場合にはガス発電システムを停止させるようになっている。
【０００５】
【発明が解決しようとする課題】
上記のように、従来から太陽光発電システム用の分電盤システムとガス発電システム用の分電盤システムとは、売電が可能か否かの点で基本的に相違しているため、両方の発電システムに対応することはできなかった。ところが近年、省エネルギーがより重要視されるようになり、住宅においても太陽光発電システムとガス発電システムとの併用が検討されている。
【０００６】
本発明は上記した従来の問題点を解決し、太陽光発電システムとガス発電システムとの両分散電源システムに対応できる分電盤システムを提供することを目的とするものである。
【０００７】
【課題を解決するための手段】
上記の課題を解決するためになされた本発明の分電盤システムは、商用電源に接続される主幹ブレーカと、その二次側の分岐部に接続された分岐ブレーカと、商用電源側に電力を逆潮流可能な分散電源が接続される分散電源用第１ブレーカと、商用電源側に電力を逆潮流できない分散電源が接続される分散電源用第２ブレーカとを備え、分散電源用第１ブレーカを主幹ブレーカの一次側に接続し、分散電源用第２ブレーカを主幹ブレーカの二次側の主幹バーの端部に設けられた送り端子に接続するとともに、分散電源用第１ブレーカの接続点と分岐部との間に、商用電源側に電力を逆潮流できない分散電源からの逆潮流を検出する第１電流センサーを接続し、この逆潮流を第１電流センサーが検出したときには、商用電源側に電力を逆潮流できない分散電源の出力を低下させるか停止させ、商用電源側への逆潮流を防止することを特徴とするものである。このような本発明の分電盤システムは、逆潮流可能な分散電源と逆潮流できない分散電源の両方のシステムに対応できる。
【０００８】
またこの場合、分散電源用第１ブレーカをキャビネット内の電流制限器と主幹ブレーカとの間に配置し、分散電源用第２ブレーカを分岐部よりも端部側に配置した構成とすることが好ましく、更に分散電源用第１ブレーカの一次側と主幹ブレーカの一次側との間に第２電流センサーを接続するとともに、第１電流センサー及び第２電流センサーの計測値を表示部に出力する計測装置を組み込んだ構成とすることが好ましい。
【０００９】
【発明の実施の形態】
以下に本発明の好ましい実施形態を示す。
図１において、１は主幹ブレーカであり、従来と同様に電流制限器２を介して商用電源に接続されている。３は主幹ブレーカ１の二次側に接続された主幹バーであり、この主幹バー３には複数の分岐ブレーカ４が接続されて分岐部５を構成している。住宅の各負荷はこれらの分岐ブレーカ４に接続されている。
【００１０】
この分電盤の同一キャビネット内には上記した主幹ブレーカ１のほかに、分散電源用第１ブレーカ６と分散電源用第２ブレーカ７とが搭載されている。分散電源用第１ブレーカ６は、商用電源側に電力を逆潮流可能な太陽光発電システムなどの分散電源８が接続されるものである。また分散電源用第２ブレーカ７は、商用電源側に電力を逆潮流できないガス発電システムなどの分散電源９が接続されるものである。
【００１１】
商用電源側に電力を逆潮流可能な分散電源８が接続される分散電源用第１ブレーカ６は、主幹ブレーカ１の一次側に接続される。図示のように、この分散電源用第１ブレーカ６の一次側と主幹ブレーカ１の一次側との間には第２電流センサー１０を接続し、分散電源８から供給される電流を計測できるようにする。
【００１２】
また商用電源側に電力を逆潮流できない分散電源９が接続される分散電源用第２ブレーカ７は、主幹ブレーカ１の二次側の主幹バー３の端部に設けられた送り端子１１に接続されている。そしてこの分散電源用第１ブレーカ６の接続点１２と前記分岐部５との間に、分散電源９からの逆潮流を検出するとともに、主幹バー３から分岐部５に流れる電流を検出するための第１電流センサー１３が接続されている。この実施形態では第１電流センサー１３は主幹ブレーカ１と分岐部５との間に接続されているが、図２に示すように第１電流センサー１３の位置は主幹バー３の一次側としてもよい。
【００１３】
なお図示されるように、分散電源用第１ブレーカ６をキャビネット内の電流制限器２と主幹ブレーカ３との間に配置し、分散電源用第２ブレーカ７を分岐部５よりも端部側（主幹ブレーカ１とは反対側）に配置することが好ましい。従って通常の分電盤では、分散電源用第２ブレーカ７は分岐部５よりも右側または下側に配置されることとなる。このような配置とすれば、分電盤内の配線が容易となり、接続状況が分かり易くなる。
【００１４】
第２電流センサー１０及び第１電流センサー１３の検出値はキャビネット内に組み込まれた計測装置１４に入力され、分散電源８、分散電源９の発電量と、負荷の使用電流とが計測される。そして計測装置１４は表示部１５にこれらの計測値を出力し、リアルタイムで表示させる。なお表示部１５として住宅情報盤を用いれば、専用の表示部を設置する必要がない。住宅情報盤としては例えばインターホンの室内器と組み合わされたものが好ましい。またこの実施形態では主幹ブレーカ１、電流制限器２、分散電源用第１ブレーカ６、分散電源用第２ブレーカ７を同一キャビネット内に搭載したが、分電盤キャビネットの大きさに応じて、分散電源用第１ブレーカ６、分散電源用第２ブレーカ７を別のキャビネットに搭載してもよい。
【００１５】
このように構成された本発明の分電盤システムは、図３(A)に示すように分散電源８と分散電源９との発電量の和よりも負荷の消費電力が大きければ、分散電源用第１ブレーカ６と分散電源用第２ブレーカ７とを通じて分岐部５に両側から電流が供給され、表示部１５にその状況が表示される。不足分は商用電源から供給されることはいうまでもない。
【００１６】
次に図３(B)に示すように、分散電源８と分散電源９との発電量の和よりも負荷の消費電力が小さいが、負荷の消費電力が分散電源９の発電量よりも大きい場合には、分散電源８の発電量の余剰分は分散電源用第１ブレーカ６を通じて商用電源側に売電することができる。売電量は第２電流センサー１０と第１電流センサー１３との差から演算される。
【００１７】
次に負荷の消費電力が更に低下し、図３(C)に示すように負荷の消費電力が分散電源９の発電量よりも小さくなった場合には、分散電源８及び分散電源９の発電量の余剰分は商用電源側への逆潮流となる。分散電源８から分散電源用第１ブレーカ６を通じて行われる売電は可能であるが、分散電源９の発電量の余剰分は売電することが認められていない。そこでこの逆潮流を第１電流センサー１３により検出したときには、分散電源９の出力を低下させるか停止させ、商用電源側への逆潮流を防止する。このようにして、本発明の分電盤システムは太陽光発電システムとガス発電システムとの両分散電源システムに対応することができ、主幹ブレーカの一次側と二次側とで逆潮流可能分と逆潮流防止分とを使い分けることができる。
【００１８】
【発明の効果】
以上に説明したように、請求項１の発明によれば逆潮流可能な分散電源が接続される分散電源用第１ブレーカと、商用電源側に電力を逆潮流できない分散電源が接続される分散電源用第２ブレーカとを備え、分散電源用第１ブレーカを主幹ブレーカの一次側に接続し、分散電源用第２ブレーカを主幹ブレーカの二次側の主幹バーの端部に設けられた送り端子に接続するとともに、分散電源用第１ブレーカの接続点と分岐部との間に第１電流センサーを接続したので、逆潮流有と逆潮流無との両分散電源システムに対応できる。また、主幹ブレーカの一次側と二次側とで逆潮流可能分と逆潮流防止分とを使い分けることができる。請求項２の発明によれば、分電盤の小型化を図ることができ、配線が容易となり、また安価で美観に優れたものとすることができるうえ、盤内の配線の接続状況が分かり易くなる。請求項３の発明によれば、発電量及び負荷の使用状況をリアルタイムで表示でき、特に住宅情報盤を表示部として利用すれば専用の表示部を設ける必要がない。
【図面の簡単な説明】
【図１】本発明の実施形態を示す回路図である。
【図２】変形例を示す回路図である。
【図３】分散電源の発電量と負荷の消費電力との関係の説明図である。
【符号の説明】
１ 主幹ブレーカ
２ 電流制限器
３ 主幹バー
４ 分岐ブレーカ
５ 分岐部
６ 分散電源用第１ブレーカ
７ 分散電源用第２ブレーカ
８ 太陽光発電システムなどの逆潮流可能な分散電源
９ ガス発電システムなどの逆潮流不可能な分散電源
１０ 第２電流センサー
１１ 送り端子
１２ 接続点
１３ 第１電流センサー
１４ 計測装置
１５ 表示部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a distribution board system adapted to a distributed power source such as a solar power generation system or a gas power generation system.
[0002]
[Prior art]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-285719
Conventionally, a residential distribution board system corresponding to this has been used for a house equipped with a solar power generation system. As shown in Patent Document 1, a solar power generation breaker is connected to an end of a main bar connected to the main breaker. The distribution panel system is supplied with electric power from a commercial power source and also supplied with the operation of a photovoltaic power generation system that is a distributed power source. When the power generated by the solar power generation system exceeds the power consumed by the load connected to the branch breaker, power can be sold by making the power flow backward to the commercial power source through the main breaker.
[0004]
Recently, a gas power generation system (cogeneration system) capable of both hot water supply and power generation is spreading in the home, and a distribution board system corresponding to the gas power generation system is also used. However, unlike the solar power generation system described above, the gas power generation cannot be sold at present. For this reason, a breaker for gas power generation is connected to the end of the main bar connected to the main breaker, and a current sensor for detecting reverse power flow is installed on the upper side of the main breaker, so that the power generated by the gas power generation system exceeds the load power consumption. When a reverse power flow is detected, the gas power generation system is stopped.
[0005]
[Problems to be solved by the invention]
As described above, the distribution panel system for the photovoltaic power generation system and the distribution panel system for the gas power generation system are basically different in terms of whether or not power can be sold. It was not possible to correspond to the power generation system. However, in recent years, energy saving has become more important, and the combined use of a photovoltaic power generation system and a gas power generation system is also being studied in homes.
[0006]
An object of the present invention is to solve the above-described conventional problems and to provide a distribution board system that can be applied to both distributed power supply systems of a photovoltaic power generation system and a gas power generation system.
[0007]
[Means for Solving the Problems]
The distribution panel system of the present invention made to solve the above-described problems is a main breaker connected to a commercial power source, a branch breaker connected to a branch portion on the secondary side, and power to the commercial power source side. A distributed power source first breaker to which a distributed power source capable of reverse power flow is connected, and a distributed power source second breaker to which a distributed power source that cannot reverse power flow is connected to the commercial power source side, Connect to the primary side of the main breaker, connect the second breaker for distributed power source to the feed terminal provided at the end of the main bar on the secondary side of the main breaker, and branch from the connection point of the first breaker for distributed power source A first current sensor that detects a reverse power flow from a distributed power source that cannot reverse power flow to the commercial power source side, and when the first current sensor detects this reverse power flow, In reverse current No distributed power output decreases or stops the, and is characterized in that to prevent reverse power flow to the commercial power supply side. Such a distribution board system of the present invention can be applied to both a distributed power source capable of reverse power flow and a distributed power source which cannot reverse power flow.
[0008]
In this case, it is preferable that the first distributed circuit breaker is disposed between the current limiter in the cabinet and the main circuit breaker, and the second distributed power circuit breaker is disposed on the end side of the branch portion. In addition, the second current sensor is connected between the primary side of the first breaker for distributed power source and the primary side of the main breaker, and the measurement values of the first current sensor and the second current sensor are output to the display unit. It is preferable to adopt a configuration in which is incorporated.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention are shown below.
In FIG. 1, reference numeral 1 denotes a main breaker, which is connected to a commercial power source via a current limiter 2 as in the conventional case. Reference numeral 3 denotes a main bar connected to the secondary side of the main circuit breaker 1, and a plurality of branch breakers 4 are connected to the main bar 3 to form a branch portion 5. Each load of the house is connected to these branch breakers 4.
[0010]
In addition to the main breaker 1 described above, a distributed power source first breaker 6 and a distributed power source second breaker 7 are mounted in the same cabinet of the distribution board. The distributed power source first breaker 6 is connected to a distributed power source 8 such as a photovoltaic power generation system capable of reverse power flow on the commercial power source side. The second breaker 7 for distributed power supply is connected to a distributed power supply 9 such as a gas power generation system that cannot reversely flow power to the commercial power supply side.
[0011]
A distributed power source first breaker 6 to which a distributed power source 8 capable of reverse power flow is connected to the commercial power source side is connected to the primary side of the main breaker 1. As shown, a second current sensor 10 is connected between the primary side of the first breaker 6 for distributed power source and the primary side of the main breaker 1 so that the current supplied from the distributed power source 8 can be measured. To do.
[0012]
Further, the second breaker 7 for distributed power source, to which the distributed power source 9 that cannot reversely flow power to the commercial power source side is connected, is connected to a feed terminal 11 provided at the end of the main bar 3 on the secondary side of the main breaker 1. ing. Then, a reverse power flow from the distributed power source 9 is detected between the connection point 12 of the first breaker 6 for the distributed power source 6 and the branch part 5 and a current flowing from the main bar 3 to the branch part 5 is detected. A first current sensor 13 is connected. In this embodiment, the first current sensor 13 is connected between the main breaker 1 and the branching portion 5, but the position of the first current sensor 13 may be the primary side of the main bar 3 as shown in FIG. 2. .
[0013]
As shown in the figure, the first distributed power source breaker 6 is disposed between the current limiter 2 and the main circuit breaker 3 in the cabinet, and the second distributed power source breaker 7 is located on the end side of the branch portion 5 ( It is preferable to arrange on the side opposite to the main breaker 1. Therefore, in the normal distribution board, the second breaker 7 for distributed power supply is arranged on the right side or the lower side with respect to the branch portion 5. With such an arrangement, wiring in the distribution board becomes easy and the connection status becomes easy to understand.
[0014]
The detection values of the second current sensor 10 and the first current sensor 13 are input to a measuring device 14 incorporated in the cabinet, and the power generation amount of the distributed power source 8 and the distributed power source 9 and the load current used are measured. And the measuring device 14 outputs these measured values to the display part 15, and displays them in real time. If a housing information board is used as the display unit 15, it is not necessary to install a dedicated display unit. As the housing information board, for example, a combination with an intercom indoor unit is preferable. In this embodiment, the main breaker 1, the current limiter 2, the first distributed power source breaker 6, and the second distributed power source breaker 7 are mounted in the same cabinet. However, depending on the size of the distribution board cabinet, The first power breaker 6 and the distributed power second breaker 7 may be mounted in separate cabinets.
[0015]
As shown in FIG. 3A, the distribution board system of the present invention configured as described above is for a distributed power source if the power consumption of the load is larger than the sum of the power generation amounts of the distributed power source 8 and the distributed power source 9. Current is supplied from both sides to the branch portion 5 through the first breaker 6 and the second breaker 7 for distributed power supply, and the status is displayed on the display portion 15. Needless to say, the shortage is supplied from commercial power.
[0016]
Next, as shown in FIG. 3B, when the power consumption of the load is smaller than the sum of the power generation amounts of the distributed power supply 8 and the distributed power supply 9, but the power consumption of the load is larger than the power generation amount of the distributed power supply 9. The surplus of the amount of power generated by the distributed power source 8 can be sold to the commercial power source through the first breaker 6 for distributed power source. The amount of power sold is calculated from the difference between the second current sensor 10 and the first current sensor 13.
[0017]
Next, when the power consumption of the load further decreases and the power consumption of the load becomes smaller than the power generation amount of the distributed power source 9 as shown in FIG. The surplus will be the reverse power flow to the commercial power source. Although it is possible to sell power from the distributed power source 8 through the first breaker 6 for distributed power source, it is not permitted to sell the surplus of the amount of power generated by the distributed power source 9. Therefore, when this reverse power flow is detected by the first current sensor 13, the output of the distributed power supply 9 is reduced or stopped to prevent the reverse power flow to the commercial power supply side. In this way, the distribution board system of the present invention can correspond to both the distributed power supply system of the photovoltaic power generation system and the gas power generation system, and the reverse power flow is possible on the primary side and the secondary side of the main breaker. It can be used properly for reverse current prevention.
[0018]
【The invention's effect】
As described above, according to the first aspect of the present invention, the first distributed power source breaker to which a distributed power source capable of reverse power flow is connected, and the distributed power source to which a distributed power source that cannot reverse power flow is connected to the commercial power source side. The second breaker for the distributed power source is connected to the primary side of the main breaker, and the second breaker for the distributed power source is connected to the feed terminal provided at the end of the main bar on the secondary side of the main breaker In addition to the connection, since the first current sensor is connected between the connection point of the first breaker for the distributed power source and the branch portion, it is possible to cope with both distributed power systems with and without reverse power flow. In addition, it is possible to selectively use the reverse flow possible portion and the reverse flow preventive portion on the primary side and the secondary side of the main breaker. According to the invention of claim 2, the distribution board can be reduced in size, wiring can be facilitated, it can be made inexpensive and excellent in aesthetics, and the connection status of the wiring in the board can be understood. It becomes easy. According to the invention of claim 3, it is possible to display the power generation amount and the usage status of the load in real time, and it is not necessary to provide a dedicated display unit, particularly if the house information panel is used as the display unit.
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing an embodiment of the present invention.
FIG. 2 is a circuit diagram showing a modification.
FIG. 3 is an explanatory diagram of a relationship between a power generation amount of a distributed power source and power consumption of a load.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main breaker 2 Current limiter 3 Main bar 4 Branch breaker 5 Branch 6 First breaker for distributed power supply 7 Second breaker for distributed power supply 8 Distributed power supply capable of reverse power flow such as solar power generation system 9 Reverse of gas power generation system Distributed power source 10 incapable of flowing power Second current sensor 11 Feed terminal 12 Connection point 13 First current sensor 14 Measuring device 15 Display unit

Claims (3)

商用電源に接続される主幹ブレーカと、その二次側の分岐部に接続された分岐ブレーカと、商用電源側に電力を逆潮流可能な分散電源が接続される分散電源用第１ブレーカと、商用電源側に電力を逆潮流できない分散電源が接続される分散電源用第２ブレーカとを備え、分散電源用第１ブレーカを主幹ブレーカの一次側に接続し、分散電源用第２ブレーカを主幹ブレーカの二次側の主幹バーの端部に設けられた送り端子に接続するとともに、分散電源用第１ブレーカの接続点と分岐部との間に、商用電源側に電力を逆潮流できない分散電源からの逆潮流を検出する第１電流センサーを接続し、この逆潮流を第１電流センサーが検出したときには、商用電源側に電力を逆潮流できない分散電源の出力を低下させるか停止させ、商用電源側への逆潮流を防止することを特徴とする分電盤システム。A main breaker connected to a commercial power source, a branch breaker connected to a branch on the secondary side thereof, a first breaker for a distributed power source to which a distributed power source capable of reverse power flow is connected to the commercial power source side, And a second breaker for distributed power source to which a distributed power source that cannot reversely flow power is connected to the power source side, the first breaker for distributed power source is connected to the primary side of the main breaker, and the second breaker for distributed power source is connected to the main breaker Connected to the feed terminal provided at the end of the secondary main trunk bar, and from the distributed power source that cannot reverse power flow to the commercial power source side between the connection point of the first breaker for the distributed power source and the branch part When a first current sensor that detects reverse power flow is connected and the first current sensor detects this reverse power flow, the output of the distributed power source that cannot reverse power flow to the commercial power source side is reduced or stopped, and then the commercial power source side is reached. The opposite of Panelboard system characterized by preventing the flow. 分散電源用第１ブレーカをキャビネット内の電流制限器と主幹ブレーカとの間に配置し、分散電源用第２ブレーカを分岐部よりも端部側に配置し、同一キャビネット内に搭載したことを特徴とする請求項１記載の分電盤システム。  The first breaker for distributed power supply is arranged between the current limiter in the cabinet and the main breaker, and the second breaker for distributed power supply is arranged on the end side of the branch part, and is mounted in the same cabinet. The distribution board system according to claim 1. 分散電源用第１ブレーカの一次側と主幹ブレーカの一次側との間に第２電流センサーを接続するとともに、第１電流センサー及び第２電流センサーの計測値を表示部に出力する計測装置を組み込んだことを特徴とする請求項１記載の分電盤システム。  A second current sensor is connected between the primary side of the first breaker for the distributed power source and the primary side of the main breaker, and a measuring device for outputting the measured values of the first current sensor and the second current sensor to the display unit is incorporated. The distribution board system according to claim 1, wherein:
JP2003117905A 2003-04-23 2003-04-23 Distribution board system Expired - Fee Related JP4311969B2 (en)

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