JP2012175818A - System interconnection protective device - Google Patents

System interconnection protective device Download PDF

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JP2012175818A
JP2012175818A JP2011035685A JP2011035685A JP2012175818A JP 2012175818 A JP2012175818 A JP 2012175818A JP 2011035685 A JP2011035685 A JP 2011035685A JP 2011035685 A JP2011035685 A JP 2011035685A JP 2012175818 A JP2012175818 A JP 2012175818A
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power
conditioner
interconnection
output
commercial
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JP5845455B2 (en
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Masato Kasaya
正人 傘谷
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Panasonic Eco Solutions Switchgear Devices Co Ltd
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Panasonic Eco Solutions Switchgear Devices Co Ltd
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Priority to PCT/JP2012/053998 priority patent/WO2012115049A1/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/388—Islanding, i.e. disconnection of local power supply from the network
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
    • G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
    • G01R22/061—Details of electronic electricity meters
    • G01R22/065—Details of electronic electricity meters related to mechanical aspects
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Distribution Board (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a system interconnection protective device that saves the trouble and time for wiring and can be made compact.SOLUTION: A power distribution board 30, a power conditioner 21, and a display device 23 are connected to a system interconnection protective device 1, which makes and breaks an interconnection generated power output from the power conditioner 21 with a commercial power system. Further, the system interconnection protective device 1 includes an interconnection breaker 11 which makes or break interconnections of decentralized power sources with the commercial power system, and a terminal block 12 which has the interconnection breaker 11 fitted to the front thereof. The terminal block 12 is mounted with an electric power measurement part 13 which measures electric power generated by at least the decentralized power sources, and housed in a case 10 together with the interconnection breaker 11.

Description

本発明は、商用電力系統に太陽光発電などの分散電源を連系又は解列させる系統連系保護装置に関するものである。   The present invention relates to a grid interconnection protection device that interconnects or disconnects a distributed power source such as photovoltaic power generation in a commercial power system.

従来、戸建住宅や集合住宅の各住戸に設置される電力分電盤に電流測定装置を接続し、個々の分岐ブレーカにおける電気使用量や主幹電力量を測定する電力監視システムが提供されている。この種の電力監視システムでは、例えば特許文献１に記載されたエネルギーマネージメントシステムのように、上述の主幹電力量や分岐電力量を表示するための表示装置が接続され、使用者や管理者が個々の住戸における電力の消費量を確認することができる。   Conventionally, a power monitoring system has been provided in which a current measuring device is connected to a power distribution board installed in each dwelling unit of a detached house or an apartment house to measure the amount of electricity used and the amount of main power in each branch breaker. . In this type of power monitoring system, for example, as in the energy management system described in Patent Document 1, a display device for displaying the above-described main power amount and branch power amount is connected. It is possible to check the power consumption in the dwelling unit.

また近年、住宅に自家発電用として太陽電池などを配設し、この太陽電池を用いて発電する分散電源を商用電力系統に連系させる系統連系システムが普及してきている。この種の系統連系システムにおいても、上述の電力監視システムに用いられるような表示装置を設け、太陽電池による発電電力や余剰電力量を表示することが行われる。   In recent years, a grid interconnection system in which a solar battery or the like is disposed in a house for private power generation, and a distributed power source that generates power using the solar battery is linked to a commercial power system has become widespread. Also in this type of grid interconnection system, a display device such as that used in the above-described power monitoring system is provided to display the power generated by the solar cell and the surplus power.

この種の系統連系システムの一例を図５に示す。図５に示す系統連系システムＡでは、主幹ブレーカ３１と複数の分岐ブレーカ３２が収容された分電盤３０と、太陽電池からの直流電源を交流電源に変換するパワーコンディショナ２１とを備える。この系統連系システムＡは、主幹ブレーカ３１の一次側とパワーコンディショナ２１との間に、パワーコンディショナ２１から供給される発電電力を商用電力系統に連系又は解列させる連系ブレーカ１１が設けられている。この連系ブレーカ１１は、パワーコンディショナ２１から出力される発電電力が十分である場合には、主幹ブレーカ３１の一次側に発電電力を供給する（系統連系）。また、発電電力が不十分である場合には、主幹ブレーカ３１の一次側への供給を停止する（系統解列）。   An example of this type of grid interconnection system is shown in FIG. The grid interconnection system A shown in FIG. 5 includes a distribution board 30 in which a main breaker 31 and a plurality of branch breakers 32 are housed, and a power conditioner 21 that converts a DC power source from a solar battery into an AC power source. This grid interconnection system A includes a grid breaker 11 that links or disconnects the generated power supplied from the power conditioner 21 to the commercial power grid between the primary side of the main breaker 31 and the power conditioner 21. Is provided. When the generated power output from the power conditioner 21 is sufficient, the interconnection breaker 11 supplies the generated power to the primary side of the main breaker 31 (system interconnection). If the generated power is insufficient, the supply to the primary side of the main breaker 31 is stopped (system disconnection).

また系統連系システムＡは、パワーコンディショナ２１からの出力される発電電力や発電量、商用電力系統からの買電電力や買電電力量などを測定する計測器４０を備えている。この計測器４０は、これらの電力及び電力量の計測結果に基づいて、買電電力量や使用電力量などの測定結果を表示装置２３に表示させるための情報を生成して表示装置２３に出力している。これにより、例えば分散電源における発電電力や発電量、商用電力系統からの買電電力量や使用電力量など、利用者にとって有益な情報を文字や画像によって表示することができる。   The grid interconnection system A also includes a measuring device 40 that measures the generated power and power output from the power conditioner 21 and the purchased power and purchased power from the commercial power system. The measuring instrument 40 generates information for displaying the measurement results such as the purchased power amount and the used power amount on the display device 23 based on the measurement results of the power and the power amount, and outputs the information to the display device 23. ing. Thereby, for example, information useful for the user, such as generated power and generated power in a distributed power source, purchased power from a commercial power system, and used power, can be displayed as characters or images.

特開２００９−１３０９８４号公報JP 2009-130984 A

しかしながら、図５に示すような従来のシステムでは、計測器４０と連系ブレーカ１１との間に複数の配線が必要であり、この配線を行うために多くの手間や時間がかかるという問題があった。また、分電盤３０に加えて、連系ブレーカ１１、パワーコンディショナ２１、及び、計測器４０を設置する必要が有るため、広い設置面積が必要になり、設置可能な条件が限られるという問題があった。   However, the conventional system as shown in FIG. 5 requires a plurality of wires between the measuring instrument 40 and the interconnection breaker 11, and there is a problem that it takes a lot of labor and time to perform this wiring. It was. Further, since it is necessary to install the interconnection breaker 11, the power conditioner 21, and the measuring instrument 40 in addition to the distribution board 30, a large installation area is required, and the conditions for installation are limited. was there.

本発明は、上記事由に鑑みて為されたものであり、その目的とするところは、配線にかかる手間や時間を低減し、設置面積を低減することが可能な系統連系保護装置を提供することにある。   The present invention has been made in view of the above reasons, and an object of the present invention is to provide a system interconnection protection device capable of reducing labor and time for wiring and reducing an installation area. There is.

上記目的を達成するために、本願の系統連系保護装置では、商用電力系統に一次側が接続された主幹ブレーカの一次側と分散電源の出力を変換するパワーコンディショナの間に接続されて、分散電源を商用電力系統に連系又は解列させる開閉部と、少なくともパワーコンディショナからの出力電力を計測する電力計測部とを備え、開閉部と電力計測部が一体的に設けられたことを特徴とする。   In order to achieve the above object, the grid interconnection protection device of the present application is connected between the primary side of the main breaker whose primary side is connected to the commercial power system and the power conditioner that converts the output of the distributed power source. It has an open / close unit that connects or disconnects the power supply to the commercial power system, and at least a power measurement unit that measures the output power from the power conditioner, and the open / close unit and the power measurement unit are provided integrally. And

また本願の系統連系保護装置では、商用電力系統の主幹配線が一次側に接続された分岐ブレーカの一次側と分散電源の出力を変換するパワーコンディショナの間に接続されて、分散電源を商用電力系統に連系又は解列させる開閉部と、少なくともパワーコンディショナからの出力電力を計測する電力計測部とを備え、開閉部と電力計測部が一体的に設けられたことを特徴とする。   In the grid interconnection protection device of the present application, the main wiring of the commercial power system is connected between the primary side of the branch breaker connected to the primary side and the power conditioner that converts the output of the distributed power source. An open / close unit connected to or disconnected from the power system and a power measurement unit that measures at least output power from the power conditioner are provided, and the open / close unit and the power measurement unit are provided integrally.

これらの系統連系保護装置の何れかにおいて、開閉部と電力計測部とを一体的に収納するハウジングを備えることが好ましい。   In any of these grid connection protection devices, it is preferable to include a housing that integrally stores the opening / closing portion and the power measurement portion.

また、商用電力系統の電力線、又は、パワーコンディショナに接続された電力線が接続される端子部を有し、開閉部とは別体に形成されて、開閉部に取り付けられる端子台を備え、端子台は、開閉部の外部接続端子と端子部との間を電気的に接続する導電部と、この導電部に流れる電流値を計測する電流計測手段を有し、電力計測部は、電流計測手段による計測結果を用いて、パワーコンディショナからの出力電力を計測するようにしてもよい。   In addition, the power line of the commercial power system or the power line connected to the power conditioner has a terminal part to which the power line is connected. The terminal part is formed separately from the opening / closing part and includes a terminal block attached to the opening / closing part. The base has a conductive part that electrically connects between the external connection terminal of the opening and closing part and the terminal part, and a current measurement unit that measures a current value flowing through the conductive part. The power measurement unit is a current measurement unit. You may make it measure the output electric power from a power conditioner using the measurement result by.

本願の系統連系保護装置によれば、配線にかかる手間や時間を低減し、設置面積を低減することが可能な系統連系保護装置を提供することができる。   According to the grid connection protection device of the present application, it is possible to provide a grid connection protection device capable of reducing labor and time for wiring and reducing the installation area.

本願の実施の形態にかかる系統連系保護装置を示す概略図である。It is the schematic which shows the grid connection protection apparatus concerning embodiment of this application. 同系統連系保護装置の配線状態を示す概略ブロック図である。It is a schematic block diagram which shows the wiring state of the same grid connection protection apparatus. 同系統連系保護装置を側面から見た概略図である。It is the schematic which looked at the same grid connection protection apparatus from the side. 同系統連系保護装置の他例を示す概略ブロック図である。It is a schematic block diagram which shows the other example of the same grid connection protection apparatus. 従来の系統連系システムを示す概略図である。It is the schematic which shows the conventional grid connection system.

以下に本発明の実施の形態を図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

本実施の形態にかかる系統連系保護装置１は、例えば住宅内の壁面などに取り付けられており、図２に示すように、分電盤３０、パワーコンディショナ２１、及び、表示装置２３が接続されている。この系統連系保護装置１は、パワーコンディショナ２１から出力される発電電力を商用電力系統に連系又は解列させ、例えば太陽電池２２のような発電手段によって発電された電力を需要屋内の負荷に供給するための装置である。   The grid connection protection device 1 according to the present embodiment is attached to, for example, a wall surface in a house, and the distribution board 30, the power conditioner 21, and the display device 23 are connected as shown in FIG. Has been. This grid connection protection device 1 links or disconnects the generated power output from the power conditioner 21 to the commercial power system, and uses the power generated by the power generation means such as the solar battery 22 to load the load in the demand room. It is a device for supplying to.

分電盤２０は、単相三線式の商用電源（図示せず）が１次側に接続された主幹ブレーカ３１と、主幹ブレーカ３１の二次側に接続された複数の分岐ブレーカ３２を収納している。主幹ブレーカ３１の一次側には、商用電源系統からの電力線Ｌ１と、系統連系保護装置１に接続された電力線Ｌ２が接続されている。すなわち、主幹ブレーカ３１の一次側には、商用電源もしくは系統連系保護装置１の何れかが出力した電力が入力される。   The distribution board 20 houses a main breaker 31 connected to a primary side of a single-phase three-wire commercial power source (not shown) and a plurality of branch breakers 32 connected to a secondary side of the main breaker 31. ing. On the primary side of the main breaker 31, a power line L1 from the commercial power supply system and a power line L2 connected to the system interconnection protection device 1 are connected. That is, the power output from either the commercial power source or the grid interconnection protection device 1 is input to the primary side of the main breaker 31.

パワーコンディショナ２１は、太陽電池２２などの発電手段から出力される直流電力を、商用電源と電圧値、周波数、及び、位相がほぼ等しい交流電源に変換して、電力線Ｌ３を介して系統連系保護装置１に出力する。本実施の形態においては、商用電源として単相三線式の交流電源を用いているので、パワーコンディショナ２１から出力される発電電力も単相三線式の交流電力に設定されている。   The power conditioner 21 converts the DC power output from the power generation means such as the solar battery 22 into an AC power supply having substantially the same voltage value, frequency, and phase as the commercial power supply, and is connected to the grid via the power line L3. Output to the protection device 1. In the present embodiment, since a single-phase three-wire AC power supply is used as a commercial power supply, the generated power output from the power conditioner 21 is also set to a single-phase three-wire AC power.

表示装置２３は、例えば液晶ディスプレイなどからなり、信号線Ｌ４を介して入力される系統連系保護装置１からの出力信号に基づいて、数値、文字、ピクトグラム、及び、画像などにより消費電力量や、利用電源比率などの諸情報を表示する。具体的には、太陽電池２２により発電され系統連系保護装置１に入力された発電電力及び発電電力量、商用電力系統からの買電電力及び買電電力量、住宅内で消費した使用電力量といった、利用者にとって有益な情報を表示する。また、消費電力量よりも発電電力量が多い場合にその余剰電力を電力会社が買い取る売電システムを利用する場合には、この余剰電力量や買取金額などを表示する。   The display device 23 is composed of, for example, a liquid crystal display and the like, and based on an output signal from the grid connection protection device 1 input via the signal line L4, the power consumption amount or the like by numerical values, characters, pictograms, images, etc. Display various information such as power supply ratio. Specifically, the generated power and generated power generated by the solar cell 22 and input to the grid connection protection device 1, the purchased power and purchased power from the commercial power system, the used power consumed in the house, and the like Display useful information for users. Further, when the power company purchases surplus power when the amount of generated power is larger than the power consumption, the surplus power amount, the purchase price, and the like are displayed.

系統連系保護装置１は、図１及び図３に示すように、パワーコンディショナ２１から入力される発電電力を商用電力系統に連系又は解列させる連系ブレーカ１１（開閉部）と、連系ブレーカ１１が前面側に搭載された端子台１２とを備える。この連系ブレーカ１１及び端子台１２は、例えば樹脂材料からなり前面が開閉自在に設定されたケース１０に収納され、壁面などの造営面に取り付けられている。   As shown in FIGS. 1 and 3, the grid interconnection protection device 1 includes a grid breaker 11 (opening / closing unit) that links or disconnects the generated power input from the power conditioner 21 to the commercial power grid. A system breaker 11 is provided with a terminal block 12 mounted on the front side. The interconnection breaker 11 and the terminal block 12 are accommodated in a case 10 made of, for example, a resin material and configured to be openable and closable on the front surface, and attached to a construction surface such as a wall surface.

連系ブレーカ１１は、後述する接続端子１４ａ〜１４ｃにそれぞれ電気的に接続される連系端子１５ａ〜１５ｃと、電力線Ｌ３が接続される入力端子１６ａ〜１６ｃを備える。連系ブレーカ１１は、入力端子１６ａ〜１６ｃと連系端子１５ａ〜１５ｃとの間の電路を開閉することにより、パワーコンディショナ２１から入力される発電電力を商用電力系統に連系又は解列させる。より具体的には、パワーコンディショナ２１から入力される発電電力が所定の電力値よりも大きい場合には、入力端子１６ａ〜１６ｃと連系端子１５ａ〜１５ｃとの間を閉路して、分散電源による発電電力を商用電力系統に連系させる。またパワーコンディショナ２１から入力される発電電力が所定の電力値以下である場合には、入力端子１６ａ〜１６ｃと連系端子１５ａ〜１５ｃとの間を開路して商用電力系統から解列させる。   The interconnection breaker 11 includes interconnection terminals 15a to 15c that are electrically connected to connection terminals 14a to 14c, which will be described later, and input terminals 16a to 16c to which the power line L3 is connected. The interconnection breaker 11 links or disconnects the generated power input from the power conditioner 21 to the commercial power system by opening and closing the electric path between the input terminals 16a to 16c and the interconnection terminals 15a to 15c. . More specifically, when the generated power input from the power conditioner 21 is larger than a predetermined power value, the input terminals 16a to 16c and the interconnection terminals 15a to 15c are closed to form a distributed power source. The power generated by the system is connected to the commercial power system. When the generated power input from the power conditioner 21 is equal to or lower than a predetermined power value, the input terminals 16a to 16c and the connection terminals 15a to 15c are opened and disconnected from the commercial power system.

端子台１２は、電力線Ｌ２が接続される接続端子１４ａ〜１４ｃを備え、各接続端子１４ａ〜１４ｃと連系ブレーカ１１の連系端子１５ａ〜１５ｃとが導電部材により電気的に接続されている。また端子台１２は、電力線Ｌ２のうち中性線を除くL1相とL2相の電線が接続される接続端子１４ａ、１４ｃを流れる電流を計測する電流計測器ＣＴ１、ＣＴ２を備える。また端子台１２には、この電流計測器ＣＴ１、ＣＴ２からの出力に基づいて、パワーコンディショナ２１からの発電電力及び発電電力量を計測する電力計測部１３が埋設されている。   The terminal block 12 includes connection terminals 14a to 14c to which the power line L2 is connected, and the connection terminals 14a to 14c and the connection terminals 15a to 15c of the connection breaker 11 are electrically connected by a conductive member. The terminal block 12 includes current measuring devices CT1 and CT2 that measure currents flowing through the connection terminals 14a and 14c to which the L1 phase and L2 phase wires of the power line L2 excluding the neutral wires are connected. In addition, a power measuring unit 13 for measuring the generated power and the amount of generated power from the power conditioner 21 is embedded in the terminal block 12 based on the outputs from the current measuring devices CT1 and CT2.

この電力計測部１３は、電線Ｌ５、Ｌ５を介して接続された電流計測器ＣＴ３、ＣＴ３からの出力と、上述の電流計測器ＣＴ１、ＣＴ２からの出力に基づいて、上述のような発電電力や発電電力量、使用電力や使用電力量などを計測する。また電力計測部１３には、信号線Ｌ４を介して表示装置２３が接続されており、これらの計測した結果を表示装置２３が表示可能な出力信号に変換して表示装置２３に出力する。より具体的には、電力計測部１３は、電流計測器ＣＴ１、ＣＴ２からの出力（電流値）と、各入力端子１６ａ〜１６ｃに印加される電圧値に基づいて、パワーコンディショナ２１から出力される発電電力と発電電力量を計測する。また電力計測部１３は、電流計測器ＣＴ３からの出力（電流値）に基づいて、商用電源系統から供給される電力及び電力量を計測し、発電電力及び発電電力量と組み合わせて、使用電力や使用電力量などの値を計測して表示装置２３に出力する。   The power measuring unit 13 generates the above-described generated power or the like based on the outputs from the current measuring devices CT3 and CT3 connected via the electric wires L5 and L5 and the outputs from the current measuring devices CT1 and CT2. Measure power generation, power consumption, power consumption, etc. The power measuring unit 13 is connected to a display device 23 via a signal line L4. The measurement result is converted into an output signal that can be displayed by the display device 23 and output to the display device 23. More specifically, the power measuring unit 13 is output from the power conditioner 21 based on outputs (current values) from the current measuring devices CT1 and CT2 and voltage values applied to the input terminals 16a to 16c. Measure the generated power and the amount of generated power. The power measuring unit 13 measures the power and the amount of power supplied from the commercial power supply system based on the output (current value) from the current measuring device CT3, and combines the generated power and the generated power amount with the power used and A value such as the amount of power used is measured and output to the display device 23.

これにより、表示装置２３には太陽電池２２による発電電力や発電電力量、商用電力系統からの買電電力及び買電電力量、住宅内で消費した使用電力量といった諸情報が表示され、利用者は電力の利用状況を容易に把握することができる。   Thereby, the display device 23 displays various information such as the power generated by the solar cell 22 and the amount of power generated, the power purchased and purchased from the commercial power system, and the amount of power consumed in the house. It is possible to easily grasp the power usage status.

このように、本実施の形態の系統連系保護装置１は、分散電源を商用電力系統に連系又は解列させる連系ブレーカ１１と、分散電源による発電電力の電力を計測する電力計測部１３が一体に設けられている。これにより、従来のように分電盤３０と電力計測部１３との間に配線が不要になり、配線にかかる手間や時間を低減することができ、また、計測器を別に配置する必要が無いので設置面積を低減することが可能となる。   As described above, the grid interconnection protection device 1 according to the present embodiment includes the interconnection breaker 11 that links or disconnects the distributed power supply to the commercial power system, and the power measurement unit 13 that measures the power generated by the distributed power supply. Are provided integrally. This eliminates the need for wiring between the distribution board 30 and the power measuring unit 13 as in the prior art, can reduce the labor and time required for wiring, and does not require a separate measuring instrument. Therefore, the installation area can be reduced.

なお、本実施の形態においては、主幹ブレーカ３１の一次側に電力線Ｌ２を接続しているが、図４に示すように、主幹ブレーカ３１の二次側（すなわち分岐ブレーカの一次側）に電力線Ｌ２を接続するようにしても良い。   In the present embodiment, the power line L2 is connected to the primary side of the main breaker 31, but the power line L2 is connected to the secondary side of the main breaker 31 (that is, the primary side of the branch breaker) as shown in FIG. May be connected.

また本実施の形態においては、連系ブレーカ１１と端子台１２とを別体に形成し、端子台１２に電力計測部１３を収納しているが、電力計測部１３及び電流計測器ＣＴ１、ＣＴ２を連系ブレーカ１１のハウジング内に一体的に収納するようにしてもよい。   In the present embodiment, the interconnection breaker 11 and the terminal block 12 are formed separately, and the power measuring unit 13 is housed in the terminal block 12, but the power measuring unit 13 and the current measuring devices CT1, CT2 May be integrally stored in the housing of the interconnection breaker 11.

１ 系統連系保護装置
１０ ケース
１１ 連系ブレーカ（開閉部）
１２ 端子台
１３ 電力計測部
１４ａ〜１４ｃ 接続端子
１５ａ〜１５ｃ 連係端子
１６ａ〜１６ｃ 入力端子
２１ パワーコンディショナ（パワーコンディショナ）
２２ 太陽電池
２３ 表示装置
３０ 分電盤
３１ 主幹ブレーカ
３２ 分岐ブレーカ
Ｌ１、Ｌ２、Ｌ３ 電力線 1 System interconnection protection device 10 Case 11 System breaker (opening / closing part)
DESCRIPTION OF SYMBOLS 12 Terminal block 13 Electric power measurement part 14a-14c Connection terminal 15a-15c Linkage terminal 16a-16c Input terminal 21 Power conditioner (power conditioner)
22 Solar cell 23 Display device 30 Distribution board 31 Main breaker 32 Branch breaker L1, L2, L3 Power line

Claims (4)

商用電力系統に一次側が接続された主幹ブレーカの一次側と分散電源の出力を変換するパワーコンディショナの間に接続されて、前記分散電源を前記商用電力系統に連系又は解列させる開閉部と、
少なくとも前記パワーコンディショナからの出力電力を計測する電力計測部とを備え、
前記開閉部と前記電力計測部が一体的に設けられたことを特徴とする系統連系保護装置。 An open / close unit connected between a primary side of a main breaker connected to the commercial power system and a power conditioner for converting the output of the distributed power source, and interconnecting or disconnecting the distributed power source from the commercial power system; ,
A power measuring unit that measures at least the output power from the power conditioner,
The grid connection protection device, wherein the open / close unit and the power measurement unit are integrally provided. 商用電力系統の主幹配線が一次側に接続された分岐ブレーカの一次側と分散電源の出力を変換するパワーコンディショナの間に接続されて、前記分散電源を前記商用電力系統に連系又は解列させる開閉部と、
少なくとも前記パワーコンディショナからの出力電力を計測する電力計測部とを備え、
前記開閉部と前記電力計測部が一体的に設けられたことを特徴とする系統連系保護装置。 Main power line of the commercial power system is connected between the primary side of the branch breaker connected to the primary side and the power conditioner that converts the output of the distributed power source, and the distributed power source is connected to or disconnected from the commercial power system An opening and closing part
A power measuring unit that measures at least the output power from the power conditioner,
The grid connection protection device, wherein the open / close unit and the power measurement unit are integrally provided. 前記開閉部と前記電力計測部とを一体的に収納するハウジングを備えることを特徴とする請求項１又は２の何れか一項に記載の系統連系保護装置。   The grid connection protection device according to claim 1, further comprising a housing that integrally accommodates the opening / closing portion and the power measurement portion. 前記商用電力系統の電力線、又は、パワーコンディショナに接続された電力線が接続される端子部を有し、前記開閉部とは別体に形成されて、前記開閉部に取り付けられる端子台を備え、
前記端子台は、前記開閉部の外部接続端子と前記端子部との間を電気的に接続する導電部と、この導電部に流れる電流値を計測する電流計測手段を有し、
前記電力計測部は、前記電流計測手段による計測結果を用いて、前記パワーコンディショナからの出力電力を計測することを特徴とする請求項１〜３の何れか一項に記載の系統連系保護装置。 A power line of the commercial power system, or a terminal part to which a power line connected to a power conditioner is connected, formed separately from the opening / closing part, and provided with a terminal block attached to the opening / closing part,
The terminal block has a conductive part that electrically connects the external connection terminal of the opening and closing part and the terminal part, and a current measuring unit that measures a current value flowing through the conductive part,
The grid connection protection according to any one of claims 1 to 3, wherein the power measuring unit measures output power from the power conditioner using a measurement result obtained by the current measuring unit. apparatus.
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