JP5906471B2 - Power monitoring apparatus and charging control system - Google Patents

Power monitoring apparatus and charging control system Download PDF

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JP5906471B2
JP5906471B2 JP2011287280A JP2011287280A JP5906471B2 JP 5906471 B2 JP5906471 B2 JP 5906471B2 JP 2011287280 A JP2011287280 A JP 2011287280A JP 2011287280 A JP2011287280 A JP 2011287280A JP 5906471 B2 JP5906471 B2 JP 5906471B2
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JP2013138533A (en
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洋二 水野
洋二 水野
慶人 陸野
慶人 陸野
浩道 井上
浩道 井上
賢吾 宮本
賢吾 宮本
昂洋 吉松
昂洋 吉松
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Panasonic Intellectual Property Management Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、電気自動車などの電気車両の充電を制御するための電力監視装置及び充電制御システムに関する。   The present invention relates to a power monitoring apparatus and a charging control system for controlling charging of an electric vehicle such as an electric vehicle.

従来例として、例えば、特許文献１に記載されている充電制御システムがある。この充電制御システムは複数の充電装置からなる。各充電装置は、バッテリ式フォークリフトを充電するためのものであり、ブレーカを介して工場内の設備電源に接続された電源コンセントに接続される電源コードを有している。また、充電装置には通信機能が搭載されており、設備電源に接続する他の充電装置との間で通信線を介して充電状態に関する情報を送受している。   As a conventional example, for example, there is a charge control system described in Patent Document 1. This charging control system includes a plurality of charging devices. Each charging device is for charging a battery-type forklift, and has a power cord connected to a power outlet connected to a facility power source in the factory via a breaker. In addition, the charging device is equipped with a communication function, and transmits / receives information regarding the charging state to / from other charging devices connected to the facility power supply via a communication line.

この従来例では、設備電源に繋がれる充電装置全体で用いることが可能な電流値であるトータル電流制限値を任意の電流値に設定し、この値を基に各充電装置で使用する電流は各々の充電装置が自動的に、他の充電装置の充電状況を確認したうえで設定するようになっている。このため、電気車両(バッテリ式フォークリフト)の充電時に充電装置で消費される電力が、充電装置に電源供給を行う設備電源の電源容量を考慮することなく、適切に設定される。故に、使用者は、設備電源の電源容量を増設することなく、また電源に繋がれる充電装置で使用中の電流量を気にすることなく、電気車両への充電を良好に行うことが可能となる。   In this conventional example, the total current limit value, which is a current value that can be used by the entire charging device connected to the facility power supply, is set to an arbitrary current value, and the current used in each charging device is based on this value. The charging device is automatically set after confirming the charging status of other charging devices. For this reason, the power consumed by the charging device when charging the electric vehicle (battery-type forklift) is appropriately set without considering the power capacity of the facility power source that supplies power to the charging device. Therefore, the user can charge the electric vehicle satisfactorily without increasing the power capacity of the equipment power source and without worrying about the amount of current in use with the charging device connected to the power source. Become.

ところで、電気車両(特に電気自動車)の充電には、通常、十数アンペア〜数十アンペア程度の大きな充電電流が必要とされる。一方、通常の住宅では、主幹ブレーカ(リミッタが設置されている場合はリミッタ)の定格電流が30アンペア〜60アンペア程度に設定されている。したがって、電磁調理器やエアコンディショナのように消費電流の大きい負荷機器が使用されているときに電気自動車を充電する場合、主幹ブレーカやリミッタがトリップしてしまう虞がある。   By the way, charging of an electric vehicle (especially an electric vehicle) usually requires a large charging current of about several tens of amperes to several tens of amperes. On the other hand, in a normal house, the rated current of the main breaker (or the limiter when a limiter is installed) is set to about 30 to 60 amperes. Therefore, when charging an electric vehicle when a load device with large current consumption such as an electromagnetic cooker or an air conditioner is being used, the main breaker or limiter may trip.

そこで、主幹ブレーカ(あるいはリミッタ。以下、同じ。)に流れる電流並びに充電電流を監視する電力監視装置を設置し、主幹ブレーカに流れる電流が定格電流を超えないように充電電流の上限値を電力監視装置で調整することが望ましい。   Therefore, a power monitoring device is installed to monitor the current flowing through the main breaker (or limiter; the same applies hereinafter) and the charging current, and the upper limit value of the charging current is monitored so that the current flowing through the main breaker does not exceed the rated current. It is desirable to adjust with a device.

特開２００３−３３３７０６号公報JP 2003-333706 A

しかしながら、電気自動車に印加される充電電圧(実効値)の種類(100ボルトと200ボルト)やリミッタの有無などの条件(以下、給電条件と呼ぶ。)によって、電力監視装置で充電電流の上限値を演算する方法が異なってくる。   However, depending on the conditions (hereinafter referred to as power supply conditions) such as the type of charging voltage (effective value) applied to the electric vehicle (100 volts and 200 volts) and the presence / absence of a limiter (hereinafter referred to as power supply conditions), the upper limit value of the charging current in the power monitoring device The method of calculating is different.

本発明は、上記課題に鑑みて為されたものであり、給電条件に応じた適切な演算方法で充電電流の上限値を演算することを目的とする。   The present invention has been made in view of the above problems, and an object of the present invention is to calculate the upper limit value of the charging current by an appropriate calculation method according to power supply conditions.

本発明の電力監視装置は、分電盤から電気車両に供給される充電電流を調整する充電制御装置とともに用いられ、前記分電盤に設けられている複数の電路に流れる電流を個別に検出する第１の電流検出手段と、前記充電電流を検出する第２の電流検出手段と、前記第１の電流検出手段の検出結果と前記第２の電流検出手段の検出結果を用いて前記充電電流の上限値を演算する演算手段と、前記演算手段で演算される前記上限値を前記充電制御装置に通知する通知手段とを備え、前記演算手段は、前記分電盤から前記電気車両への給電条件に応じて、前記上限値の演算方法を変更し、前記分電盤から前記電気車両に給電される電圧が複数の電圧値の中から選択可能であって、前記給電条件は、選択される前記電圧値、並びに前記分電盤におけるリミッタの有無であることを特徴とする。 The power monitoring device of the present invention is used together with a charge control device that adjusts the charging current supplied from the distribution board to the electric vehicle, and individually detects the current flowing through the plurality of electric circuits provided in the distribution board. The first current detection means, the second current detection means for detecting the charging current, the detection result of the first current detection means and the detection result of the second current detection means Computation means for computing an upper limit value, and notification means for notifying the charge control device of the upper limit value computed by the computation means, wherein the computation means is a power supply condition from the distribution board to the electric vehicle. Accordingly, the upper limit value calculation method is changed , and a voltage supplied from the distribution board to the electric vehicle can be selected from a plurality of voltage values, and the power supply condition is selected Voltage value, as well as in the distribution board Wherein the presence or absence of emitter.

本発明の充電制御システムは、前記何れかの電力監視装置と、前記電力監視装置から通知される前記上限値を超えないように前記充電電流を調整する前記充電制御装置とを有することを特徴とする。   The charge control system of the present invention includes any one of the power monitoring devices and the charge control device that adjusts the charging current so as not to exceed the upper limit value notified from the power monitoring device. To do.

本発明の電力監視装置及び充電制御システムは、給電条件に応じた適切な演算方法で充電電流の上限値を演算することができるという効果がある。   The power monitoring apparatus and the charging control system of the present invention have an effect that the upper limit value of the charging current can be calculated by an appropriate calculation method according to the power supply conditions.

本発明に係る電力監視装置及び充電制御システムの実施形態を示すブロック図及びシステム構成図である。1 is a block diagram and a system configuration diagram showing an embodiment of a power monitoring apparatus and a charging control system according to the present invention. 同上における充電制御装置の基本的な充電制御動作を説明するためのタイムチャートである。It is a time chart for demonstrating the basic charge control operation | movement of the charge control apparatus same as the above. 同上における電力監視装置の動作を説明するためのタイムチャートである。It is a time chart for demonstrating operation | movement of the electric power monitoring apparatus same as the above.

以下、戸建の住宅に設置され、電力系統から供給される電力を利用した電気自動車の充電を制御する充電制御システムに本発明の技術思想を適用した実施形態について、図面を参照して詳細に説明する。ただし、充電制御の対象となる電気車両は電気自動車に限定されず、電気自動車以外の電気車両、例えば、従来技術で説明したバッテリ式フォークリフトなどであっても構わない。   Hereinafter, an embodiment in which the technical idea of the present invention is applied to a charging control system that is installed in a detached house and controls charging of an electric vehicle using electric power supplied from an electric power system will be described in detail with reference to the drawings. explain. However, the electric vehicle subject to charge control is not limited to an electric vehicle, and may be an electric vehicle other than an electric vehicle, for example, a battery-type forklift described in the related art.

図１に示すように、住宅には電力系統100から単相３線式の交流電力が住宅用分電盤(住宅盤)４を介して供給される。住宅盤４は１次側が電力系統100と接続される主幹ブレーカ40と、主幹ブレーカ40の２次側に分岐接続される複数の分岐ブレーカ41とを有している。ただし、主幹ブレーカ40の１次側にリミッタ(電流制限器あるいは契約ブレーカとも呼ばれる。)が挿入される場合がある。なお、図示は省略するが、各分岐ブレーカ41の２次側に屋内配線を介してコンセントや負荷(照明器具や電磁調理器など)が接続される。   As shown in FIG. 1, single-phase, three-wire AC power is supplied from a power system 100 to a house through a residential distribution board (housing board) 4. The housing board 4 has a main breaker 40 whose primary side is connected to the power system 100, and a plurality of branch breakers 41 branched and connected to the secondary side of the main breaker 40. However, a limiter (also called a current limiter or a contract breaker) may be inserted on the primary side of the main breaker 40. In addition, although illustration is abbreviate | omitted, an outlet and load (a lighting fixture, an electromagnetic cooker, etc.) are connected to the secondary side of each branch breaker 41 via indoor wiring.

本実施形態の充電制御システムは、図１に示すように充電制御装置１及び電力監視装置２、報知装置３によって構成されている。   As shown in FIG. 1, the charge control system of this embodiment includes a charge control device 1, a power monitoring device 2, and a notification device 3.

電力監視装置２は、制御部20、電流計測部21、信号伝送部22、通信部23などを備える。電流計測部21は、主幹ブレーカ40の１次側に接続される３本の電灯線のうちの中性線以外の２本の電灯線に流れる電流をそれぞれ電流センサ210，211を用いて計測し、それぞれの計測値を制御部20に出力する。制御部20はマイクロコンピュータを主構成要素とし、電流計測部21で計測される電流値と主幹ブレーカ40の１次側電圧(入力電圧)の計測値(電圧値)とに基づいて、電力系統100から供給される電力(供給電力)の瞬時値や積算値などを演算している。信号伝送部22は報知装置３との間で信号伝送を行うものである。また通信部23は充電制御装置１との間で通信線24を介した通信を行うものであって、例えば、RS485規格に準拠したシリアル通信を行う。ただし、通信部23の通信方式はRS485規格に限定されるものではない。   The power monitoring device 2 includes a control unit 20, a current measurement unit 21, a signal transmission unit 22, a communication unit 23, and the like. The current measuring unit 21 measures the currents flowing in the two power lines other than the neutral line among the three power lines connected to the primary side of the main breaker 40 using current sensors 210 and 211, respectively. Each measurement value is output to the control unit 20. The control unit 20 has a microcomputer as a main component, and is based on the current value measured by the current measurement unit 21 and the measured value (voltage value) of the primary side voltage (input voltage) of the main breaker 40. The instantaneous value or integrated value of the power supplied from (the supplied power) is calculated. The signal transmission unit 22 performs signal transmission with the notification device 3. The communication unit 23 performs communication with the charging control apparatus 1 via the communication line 24, and performs serial communication based on the RS485 standard, for example. However, the communication method of the communication unit 23 is not limited to the RS485 standard.

充電制御装置１は、信号処理部10、零相変流器11、漏電検出部12、開閉部13、通信制御部14、充電ケーブル15、充電コネクタ16、電流制御部17などを備える。また充電制御装置１は、電気自動車200の駐車スペース(車庫)に近い場所に設置され、住宅盤４の分岐ブレーカ41で分岐された分岐回路の一つ(図１では下段右端の分岐ブレーカ41)に接続される。充電ケーブル15は、電気自動車200への供給電流(充電電流)が流れる給電線150と、後述するパイロット信号が伝送される伝送線151とが絶縁シースで被覆されてなり、先端部分に充電コネクタ16が設けられている。充電コネクタ16は、電気自動車200の車体に設けられている差込口(インレット)に挿抜自在に差込接続される。そして、充電コネクタ16が差込口に差込接続されると、電力系統100から住宅盤４及び充電制御装置１を介した電力(充電電力)の供給と、充電制御装置１の信号処理部10と電気自動車200の充電用ECU(電子制御ユニット)との間のパイロット信号の伝送とが可能になる。   The charging control device 1 includes a signal processing unit 10, a zero-phase current transformer 11, a leakage detection unit 12, an opening / closing unit 13, a communication control unit 14, a charging cable 15, a charging connector 16, a current control unit 17, and the like. The charging control device 1 is installed near a parking space (garage) of the electric vehicle 200 and is one of the branch circuits branched by the branch breaker 41 of the housing board 4 (the branch breaker 41 at the lower right end in FIG. 1). Connected to. The charging cable 15 is formed by covering a power supply line 150 through which a supply current (charging current) to the electric vehicle 200 flows and a transmission line 151 through which a pilot signal, which will be described later, is transmitted, with an insulating sheath, and a charging connector 16 at the tip portion. Is provided. The charging connector 16 is inserted and connected so as to be freely inserted into and removed from an insertion port (inlet) provided in the vehicle body of the electric vehicle 200. When the charging connector 16 is plugged into the insertion port, power (charging power) is supplied from the power system 100 via the housing panel 4 and the charging control device 1, and the signal processing unit 10 of the charging control device 1. And a pilot signal can be transmitted between the electric vehicle 200 and a charging ECU (electronic control unit).

開閉部13は、分岐ブレーカ41から給電線150までの給電路に挿入される電磁リレー(図示せず)を有し、電流制御部17からの指示に応じて電磁リレーをオン・オフすることで前記給電路を開閉する。漏電検出部12は、給電路に流れる不平衡電流を零相変流器11で検出し、当該不平衡電流の検出レベルがしきい値を超えた場合に漏電が生じていると判断し、開閉部13を制御して給電路を開成させる。通信制御部14は、電力監視装置２の通信部23との間で通信(RS485規格のシリアル通信)を行う。電流制御部17は、後述するように電力監視装置２から送られてくる充電制御情報に応じて電気自動車200に供給される充電電流を調整する。信号処理部10は、伝送線151を介してパイロット信号を伝送する。なお、電力監視装置２では、充電制御装置１を介して電気自動車200に供給される電流(充電電流)を電流センサ212で計測している。   The open / close unit 13 has an electromagnetic relay (not shown) inserted into the power supply path from the branch breaker 41 to the power supply line 150, and turns on / off the electromagnetic relay according to an instruction from the current control unit 17. Open and close the feeding path. The leakage detector 12 detects the unbalanced current flowing in the power supply path with the zero-phase current transformer 11, and determines that a leakage has occurred when the detected level of the unbalanced current exceeds the threshold value. The unit 13 is controlled to open the power supply path. The communication control unit 14 performs communication (RS485 standard serial communication) with the communication unit 23 of the power monitoring device 2. As will be described later, the current control unit 17 adjusts the charging current supplied to the electric vehicle 200 according to the charging control information sent from the power monitoring device 2. The signal processing unit 10 transmits a pilot signal via the transmission line 151. In the power monitoring device 2, the current (charge current) supplied to the electric vehicle 200 via the charge control device 1 is measured by the current sensor 212.

報知装置３は、制御部30、信号伝送部31、表示部32、音響部33、操作入力部34などを有している。信号伝送部31は電力監視装置２の信号伝送部22との間で信号伝送を行う。表示部32は、発光ダイオードからなる表示素子と、制御部30に制御されて表示素子を発光させる発光回路とを有している。ただし、発光ダイオードの代わりに液晶ディスプレイや有機ＥＬディスプレイなどの２次元の表示デバイスが用いられてもよい。音響部33はスピーカとスピーカを駆動する駆動回路を有している。操作入力部34は押釦スイッチを有し、押釦スイッチが押操作された場合に操作信号を出力する。   The notification device 3 includes a control unit 30, a signal transmission unit 31, a display unit 32, an acoustic unit 33, an operation input unit 34, and the like. The signal transmission unit 31 performs signal transmission with the signal transmission unit 22 of the power monitoring device 2. The display unit 32 includes a display element formed of a light emitting diode and a light emitting circuit that is controlled by the control unit 30 to cause the display element to emit light. However, a two-dimensional display device such as a liquid crystal display or an organic EL display may be used instead of the light emitting diode. The acoustic unit 33 includes a speaker and a drive circuit that drives the speaker. The operation input unit 34 includes a push button switch, and outputs an operation signal when the push button switch is pressed.

制御部30はマイクロコンピュータを主構成要素とし、信号伝送部31を介して電力監視装置２から受け取る監視情報を、表示部32や音響部33を制御して利用者(住人)に報知する報知機能を有している。また制御部30は、操作入力部34から出力される操作信号に応じた制御指令を信号伝送部31を介して電力監視装置２に伝送する制御機能も有している。   The control unit 30 includes a microcomputer as a main component, and notifies the user (resident) of monitoring information received from the power monitoring device 2 via the signal transmission unit 31 by controlling the display unit 32 and the sound unit 33. have. The control unit 30 also has a control function of transmitting a control command corresponding to the operation signal output from the operation input unit 34 to the power monitoring device 2 via the signal transmission unit 31.

ここで、図２のタイムチャートを参照して充電制御装置１の基本的な充電制御動作を説明する。まず、時刻t0に充電コネクタ16が電気自動車200の差込口に接続されると、信号処理部10から所定の電圧V1(例えば、V1=12ボルト)が伝送線151に印加される。そして、伝送線151に印加される電圧がコントロールパイロット(CPLT)信号(以下、パイロット信号と略す。)の伝送媒体となり、その電圧レベル及びデューティ比に応じて、後述するように充電用ECUと信号処理部10との間で種々の情報が授受される。   Here, the basic charge control operation of the charge control device 1 will be described with reference to the time chart of FIG. First, when the charging connector 16 is connected to the insertion port of the electric vehicle 200 at time t0, a predetermined voltage V1 (for example, V1 = 12 volts) is applied from the signal processing unit 10 to the transmission line 151. The voltage applied to the transmission line 151 serves as a transmission medium for a control pilot (CPLT) signal (hereinafter abbreviated as a pilot signal). Depending on the voltage level and the duty ratio, the charging ECU and the signal will be described later. Various information is exchanged with the processing unit 10.

充電用ECUは、電圧V1のパイロット信号を検知すると、パイロット信号の電圧レベルをV1からV2(例えば、V2=９ボルト)に降圧する(時刻t1〜t2)。信号処理部10は、パイロット信号がV1からV2に低下したことを検出すると、所定周波数(例えば１キロヘルツ)のパルス状のパイロット信号を出力する(時刻t2〜)。当該パイロット信号の信号レベルは±V1であるが、上限レベルはV2に降圧されている。パイロット信号のデューティ比は、充電電流の上限値(充電制御装置１の電流容量)を示し、充電制御装置１毎に予め設定されている。例えば、電流容量が12アンペアの場合にはデューティ比が20％、電流容量が30アンペアの場合にはデューティ比が50％に設定される。充電用ECUは、パイロット信号のデューティ比を検知して電流容量を認識すると、パイロット信号の電圧レベルをV2からV3(例えば、６Ｖ)に降圧する(時刻t3)。信号処理部10は、パイロット信号の信号レベルがV2からV3に低下したことを検知して電流制御部17に通知する。通知された電流制御部17は、開閉部13を閉成して充電電力の供給を開始する。   When the charging ECU detects the pilot signal of voltage V1, it lowers the voltage level of the pilot signal from V1 to V2 (for example, V2 = 9 volts) (time t1 to t2). When the signal processing unit 10 detects that the pilot signal has decreased from V1 to V2, the signal processing unit 10 outputs a pulsed pilot signal having a predetermined frequency (for example, 1 kilohertz) (from time t2). The signal level of the pilot signal is ± V1, but the upper limit level is stepped down to V2. The duty ratio of the pilot signal indicates an upper limit value of the charging current (current capacity of the charging control device 1), and is set in advance for each charging control device 1. For example, when the current capacity is 12 amperes, the duty ratio is set to 20%, and when the current capacity is 30 amperes, the duty ratio is set to 50%. When the charging ECU detects the duty ratio of the pilot signal and recognizes the current capacity, it lowers the voltage level of the pilot signal from V2 to V3 (for example, 6V) (time t3). The signal processing unit 10 detects that the signal level of the pilot signal has decreased from V2 to V3, and notifies the current control unit 17 of it. The notified current control unit 17 closes the opening / closing unit 13 and starts supplying charging power.

充電用ECUは電流容量に基づいて蓄電池の充電レベルを目標レベルまで充電するための電流値(≦電流容量)を設定し、電気自動車200に搭載されている充電器(図示せず)に充電指令を出力する。充電指令を受けた充電器は、充電用ECUが設定した電流値を超えないように充電電流を調整しながら蓄電池を充電する(時刻t3〜)。充電用ECUは、蓄電池の充電レベルが目標レベルに達すると、充電器に充電終了指令を出力して蓄電池への充電を終了し、パイロット信号の電圧レベルをV3からV2に復帰させる(時刻t4)。充電器は、充電終了指令を受信すると蓄電池の充電を終了する。   The charging ECU sets the current value (≦ current capacity) for charging the storage battery to the target level based on the current capacity, and commands the charger (not shown) installed in the electric vehicle 200 to charge Is output. The charger that has received the charging command charges the storage battery while adjusting the charging current so as not to exceed the current value set by the charging ECU (from time t3). When the charge level of the storage battery reaches the target level, the charging ECU outputs a charge end command to the charger to finish charging the storage battery, and returns the voltage level of the pilot signal from V3 to V2 (time t4) . When the charger receives the charging end command, the charger ends the charging of the storage battery.

信号処理部10は、パイロット信号がV3からV2に変化したことを検知して電流制御部17に通知する。通知された電流制御部17は、開閉部13を開成して交流電力の供給を停止する。充電用ECUは、パイロット信号の電圧レベルを当初のV1に復帰させる(時刻t5)。信号処理部10は、パイロット信号の電圧レベルがV1に復帰すると、所定周波数の発振を停止してパイロット信号の電圧レベルをV1に維持して待機状態に戻る(時刻t6)。   The signal processing unit 10 detects that the pilot signal has changed from V3 to V2, and notifies the current control unit 17 of the change. The notified current control unit 17 opens the opening / closing unit 13 and stops the supply of AC power. The charging ECU restores the voltage level of the pilot signal to the original V1 (time t5). When the voltage level of the pilot signal returns to V1, the signal processing unit 10 stops oscillation at a predetermined frequency, maintains the voltage level of the pilot signal at V1, and returns to the standby state (time t6).

上述のように充電制御装置１は、電気自動車200への充電電力の供給を入切するとともに電気自動車200の充電用ECUに対して充電電流の上限値を指示することで電気自動車200に搭載されている蓄電池の充電を制御している。   As described above, the charging control device 1 is mounted on the electric vehicle 200 by turning on / off the supply of charging power to the electric vehicle 200 and instructing the charging ECU of the electric vehicle 200 to the upper limit value of the charging current. It controls the charging of the storage battery.

一方、電力監視装置２の制御部20は、主幹ブレーカ40に流れる電流(全消費電流)が規制値を超えた場合、充電電流の上限値を、規制値から全消費電流と現在の充電電流の電流値の差を差し引いた電流値とする指令(調整指令)を通信部22から送信させる。なお、全消費電流は、充電電流と負荷機器の消費電流(負荷消費電流)の総和である。また規制値は、例えば、主幹ブレーカ40の定格電流の80％、あるいはリミッタの定格電流の90％の値に設定される。以下の説明では、充電電流の上限値(許容値)をIevo、全消費電流の電流値をIall、規制値をIset、充電電流の計測値をIev、制限値をIrと表す。ただし、制限値Irとは、全消費電流Iallが規制値Isetを超えた場合に充電電流を減少させるときの電流値である。つまり、充電電流の上限値Ievoは、Ievo=Iset-(Iall-Iev)の式から演算される値に調整される。   On the other hand, when the current (total current consumption) flowing through the main breaker 40 exceeds the regulation value, the control unit 20 of the power monitoring device 2 sets the upper limit value of the charging current from the regulation value to the total current consumption and the current charging current. A command (adjustment command) for subtracting the difference between the current values is transmitted from the communication unit 22. The total consumption current is the sum of the charging current and the consumption current of the load device (load consumption current). Further, the regulation value is set to, for example, a value of 80% of the rated current of the main breaker 40 or 90% of the rated current of the limiter. In the following description, the upper limit value (allowable value) of the charging current is represented by Ievo, the current value of the total consumption current is represented by Iall, the regulation value is represented by Iset, the measured value of the charging current is represented by Iev, and the limit value is represented by Ir. However, the limit value Ir is a current value when the charging current is reduced when the total consumption current Iall exceeds the regulation value Iset. That is, the upper limit value Ievo of the charging current is adjusted to a value calculated from the equation Ievo = Iset− (Iall−Iev).

充電制御装置１においては、電力監視装置２から送信される調整指令を通信制御部14で受信して電流制御部17に渡す。電流制御部17は、信号処理部10に対して充電電流の上限値を調整指令で指示された上限値以下とするように指示する。そして、信号処理部10は電流制御部17からの指示を受けると、パイロット信号のオンデューティ比を減少させる。例えば、充電ケーブル15の電流容量が20アンペアである場合、当初50％であったオンデューティ比が40％〜20％に減少され、結果的に充電電流の上限値が当初の20アンペアよりも低い値(例えば、10アンペア)に調整されることになる。   In the charging control device 1, the adjustment command transmitted from the power monitoring device 2 is received by the communication control unit 14 and passed to the current control unit 17. The current control unit 17 instructs the signal processing unit 10 to set the upper limit value of the charging current to be equal to or less than the upper limit value specified by the adjustment command. When the signal processing unit 10 receives an instruction from the current control unit 17, it reduces the on-duty ratio of the pilot signal. For example, when the current capacity of the charging cable 15 is 20 amperes, the on-duty ratio, which was 50% at the beginning, is reduced to 40% to 20%, and as a result, the upper limit value of the charging current is lower than the original 20 amperes. Will be adjusted to a value (eg, 10 amps).

電気自動車200の充電用ECUは、調整後の上限値に基づいて再度充電電流の電流値を設定して充電器に充電指令を出力する。充電指令を受けた充電器は、充電用ECUが設定した新たな電流値を超えないように充電電流を調整しながら蓄電池を充電する。その結果、電気自動車200に供給される充電電流が減少するので、全消費電流が主幹ブレーカ40またはリミッタの定格電流を超えてしまうことが回避できる。   The charging ECU of the electric vehicle 200 sets the current value of the charging current again based on the adjusted upper limit value and outputs a charging command to the charger. The charger that has received the charging command charges the storage battery while adjusting the charging current so as not to exceed the new current value set by the charging ECU. As a result, since the charging current supplied to the electric vehicle 200 decreases, it can be avoided that the total current consumption exceeds the rated current of the main breaker 40 or the limiter.

ところで、制御部20における充電電流の上限値の演算方法は、充電制御装置１が接続されている分岐回路の電圧実効値(100ボルトまたは200ボルト)及びリミッタの有無によって異なっている。以下、４種類の給電条件(１)〜(４)毎に充電電流の上限値の演算方法を説明する。なお４種類の給電条件は、(１)リミッタ無し且つ電圧実効値が200ボルト、(２)リミッタ無し且つ電圧実効値が100ボルト、(３)リミッタ有り且つ電圧実効値が200ボルト、(４)リミッタ有り且つ電圧実効値が100ボルト、である。   By the way, the calculation method of the upper limit value of the charging current in the control unit 20 differs depending on the effective voltage value (100 volts or 200 volts) of the branch circuit to which the charging control device 1 is connected and the presence or absence of a limiter. Hereinafter, a calculation method of the upper limit value of the charging current will be described for each of the four types of power supply conditions (1) to (4). The four types of power supply conditions are as follows: (1) No limiter and effective voltage value of 200 volts, (2) No limiter and effective voltage value of 100 volts, (3) With limiter and effective voltage value of 200 volts, (4) There is a limiter and the effective voltage value is 100 volts.

全消費電流Iallが規制値Isetを超えていなければ、制御部20は、充電電流の上限値IevoをIevo=Iset-(Iall-Iev)の式から演算して充電制御装置１に指示する。一方、全消費電流Iallが規制値Isetを超えれば、制御部20は、充電電流の上限値IevoをIevo=Iset-(Iall-Iev)-Irの式から演算して充電制御装置１に指示する。また、全消費電流Iallが規制値Isetを超えて充電電流の上限値Ievoが減少させられた後、全消費電流Iallが30秒間継続して規制値Isetと制限値Irの差分以下になれば、制御部20は、充電電流の上限値IevoをIevo=Iset-(Iall-Iev)の式から演算した値に戻す(図３参照)。なお、給電条件(１)〜(４)は、電力監視装置２に設けられる設定手段(例えば、ディップスイッチ)によって設定され、制御部20がディップスイッチの設定を読み取ることで給電条件(１)〜(４)を判断する。   If the total consumption current Iall does not exceed the regulation value Iset, the control unit 20 calculates the upper limit value Ievo of the charging current from the equation Ievo = Iset− (Iall−Iev) and instructs the charging control device 1. On the other hand, if the total consumption current Iall exceeds the regulation value Iset, the control unit 20 calculates the upper limit value Ievo of the charging current from the formula Ievo = Iset− (Iall−Iev) −Ir and instructs the charging control device 1. . In addition, after the total consumption current Iall exceeds the regulation value Iset and the upper limit value Ievo of the charging current is reduced, if the total consumption current Iall continues for 30 seconds and becomes less than the difference between the regulation value Iset and the limit value Ir, The control unit 20 returns the upper limit value Ievo of the charging current to a value calculated from the equation Ievo = Iset− (Iall−Iev) (see FIG. 3). The power supply conditions (1) to (4) are set by setting means (for example, a dip switch) provided in the power monitoring device 2, and the control unit 20 reads the setting of the dip switch so that the power supply conditions (1) to (4) are set. Determine (4).

まず、給電条件(１)の場合、２つの電流センサ210，211の計測値のうちで大きい方の計測値が全消費電流Iallとみなされ、上記Ievo=Iset-(Iall-Iev)の式から充電電流の上限値Ievoが演算される。また、給電条件(２)の場合、充電制御装置１が接続されている分岐回路に流れる電流の計測値が全消費電流Iallとみなされ、上記Ievo=Iset-(Iall-Iev)の式から充電電流の上限値Ievoが演算される。   First, in the case of the power supply condition (1), the larger measured value of the measured values of the two current sensors 210 and 211 is regarded as the total current consumption Iall, and the above formula Ievo = Iset− (Iall−Iev) The upper limit value Ievo of the charging current is calculated. In the case of the power supply condition (2), the measured value of the current flowing through the branch circuit to which the charging control device 1 is connected is regarded as the total consumption current Iall, and charging is performed from the above formula Ievo = Iset- (Iall-Iev). The upper limit value Ievo of the current is calculated.

一方、給電条件(３)，(４)においては、住宅盤４にリミッタが設置されるため、２つの電流センサ210，211の計測値の合計(ベクトル合成電流)が全消費電流Iallとみなされる。また、電圧実効値が200ボルトである給電条件(３)の場合、電流センサ212の計測値を100ボルトにおける計測値に換算するために２倍する必要がある。故に、給電条件(３)の場合、充電電流の上限値Ievoは、Ievo=(Iset-(Iall-2×Iev))/2の式から演算される。また、給電条件(４)の場合は、Ievo=(Iset-(Iall-Iev)の式から充電電流の上限値Ievoが演算される。   On the other hand, in the power supply conditions (3) and (4), since a limiter is installed on the housing panel 4, the total (vector combined current) of the measured values of the two current sensors 210 and 211 is regarded as the total consumption current Iall. . In the case of the power supply condition (3) where the voltage effective value is 200 volts, it is necessary to double the measured value of the current sensor 212 in order to convert it to the measured value at 100 volts. Therefore, in the case of the power supply condition (3), the upper limit value Ievo of the charging current is calculated from the equation Ievo = (Iset− (Iall−2 × Iev)) / 2. In the case of the power supply condition (4), the upper limit value Ievo of the charging current is calculated from the formula Ievo = (Iset− (Iall−Iev)).

上述のように本実施形態の電力監視装置２及び充電制御システムによれば、充電電圧の電圧実効値の種類(100ボルトと200ボルト)やリミッタの有無などの給電条件に応じた適切な演算方法で充電電流の上限値を演算することができる。   As described above, according to the power monitoring device 2 and the charge control system of the present embodiment, an appropriate calculation method according to the power supply conditions such as the type of effective value of the charge voltage (100 volts and 200 volts) and the presence / absence of a limiter Thus, the upper limit value of the charging current can be calculated.

１ 充電制御装置
２ 電力監視装置
４ 住宅用分電盤(分電盤)
20 制御部(演算手段，通知手段)
21 電流計測部(電流検出手段)
23 通信部(通知手段)
210〜212 電流センサ(電流検出手段) 1 Charging control device 2 Power monitoring device 4 Residential distribution board (distribution board)
20 Control unit (calculation means, notification means)
21 Current measurement unit (current detection means)
23 Communication part (notification means)
210 to 212 Current sensor (current detection means)

Claims (2)

分電盤から電気車両に供給される充電電流を調整する充電制御装置とともに用いられ、前記分電盤に設けられている複数の電路に流れる電流を個別に検出する第１の電流検出手段と、前記充電電流を検出する第２の電流検出手段と、前記第１の電流検出手段の検出結果と前記第２の電流検出手段の検出結果を用いて前記充電電流の上限値を演算する演算手段と、前記演算手段で演算される前記上限値を前記充電制御装置に通知する通知手段とを備え、前記演算手段は、前記分電盤から前記電気車両への給電条件に応じて、前記上限値の演算方法を変更し、前記分電盤から前記電気車両に給電される電圧が複数の電圧値の中から選択可能であって、前記給電条件は、選択される前記電圧値、並びに前記分電盤におけるリミッタの有無であることを特徴とする電力監視装置。 A first current detection unit that is used together with a charging control device that adjusts a charging current supplied from the distribution board to the electric vehicle, and that individually detects a current flowing through a plurality of electric paths provided in the distribution board; Second current detection means for detecting the charging current; calculation means for calculating the upper limit value of the charging current using the detection result of the first current detection means and the detection result of the second current detection means; A notification means for notifying the charging control device of the upper limit value calculated by the calculating means, wherein the calculation means determines the upper limit value according to a power supply condition from the distribution board to the electric vehicle. The voltage supplied to the electric vehicle from the distribution board can be selected from a plurality of voltage values by changing the calculation method, and the power supply condition includes the selected voltage value and the distribution board it is the presence or absence of the limiter in Power monitoring device according to claim. 請求項１の電力監視装置と、前記電力監視装置から通知される前記上限値を超えないように前記充電電流を調整する前記充電制御装置とを有することを特徴とする充電制御システム。 A charge control system comprising: the power monitoring device according to claim 1; and the charge control device that adjusts the charging current so as not to exceed the upper limit value notified from the power monitoring device .
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