WO2022224320A1 - 情報処理装置、ヒューズ選択方法およびプログラム - Google Patents
情報処理装置、ヒューズ選択方法およびプログラム Download PDFInfo
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- WO2022224320A1 WO2022224320A1 PCT/JP2021/015928 JP2021015928W WO2022224320A1 WO 2022224320 A1 WO2022224320 A1 WO 2022224320A1 JP 2021015928 W JP2021015928 W JP 2021015928W WO 2022224320 A1 WO2022224320 A1 WO 2022224320A1
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- power supply
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- 230000010365 information processing Effects 0.000 title claims abstract description 28
- 238000010187 selection method Methods 0.000 title claims description 5
- 239000003990 capacitor Substances 0.000 claims description 28
- 238000004364 calculation method Methods 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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- the present invention relates to an information processing device, a fuse selection method, and a program.
- a large-capacity electrolytic capacitor and fuse built into the current distribution device are used for short-circuit protection in an indoor DC power supply system (cable length of several hundred meters or less). In the event of a short circuit, electric charge is supplied from the large-capacity capacitor to the fuse, blowing the fuse. In an outdoor DC power supply system with a long cable length (about several thousand meters), a large-capacity capacitor cannot be used.
- Non-Patent Document 1 discloses a system design method that considers the effects of short-circuit faults in a high-voltage DC power supply system.
- the disclosed technology aims to support the selection of fuses in power supply systems.
- the disclosed technology includes information including a data acquisition unit that acquires data indicating characteristics of a power supply system, and a fuse selection unit that selects a fuse to be blown when a short circuit occurs in the power supply system based on the data. processing equipment.
- FIG. 2 is a functional configuration diagram of an information processing device
- FIG. 7 is a flowchart showing an example of the flow of fuse selection processing
- FIG. 4 is a first diagram showing an example of current waveforms
- FIG. 4B is a second diagram showing an example of a current waveform
- FIG. 1 is a diagram showing the system configuration of the power supply system to be determined.
- the power supply system 1 to be subjected to the determination process according to the present embodiment is an outdoor DC power supply system, and the cable length of the power supply cable is about several thousand meters.
- the power supply system 1 includes a rectifier (or AC/DC converter) 901 , a distribution board 902 , a DC/DC converter 903 , a fuse 906 , a cable impedance 907 and equipment 908 .
- the DC/DC converter 903 includes a gate block 904 and an X capacitor 905 .
- a DC power supply system for outdoor use cannot use a large-capacity capacitor like an indoor DC power supply system, so the fuse 906 is difficult to blow. Furthermore, as the cable length of the power supply cable increases, the cable impedance increases and the short-circuit current decreases, so there is a characteristic that the fuse 906 is less likely to blow.
- the DC/DC converter 903 has a function of detecting an overcurrent due to a short circuit or the like and opening the gate block 904 to stop power supply.
- the charge accumulated in the X capacitor 905 (about several hundred to several thousand uF/kW) incorporated in the output filter of the DC/DC converter 903 continues toward the short-circuit point. continue to flow.
- the current flowing from the X capacitor 905 may melt the fuse 906 .
- a method of selecting a fuse 906 having an appropriate rated current for short-circuit protection of the power supply system 1 using the information processing apparatus according to the present embodiment will be described below.
- FIG. 2 is a functional configuration diagram of the information processing device.
- the information processing device 10 includes a data acquisition section 11 , a current waveform calculation section 12 , a selection reference value calculation section 13 , a fuse selection section 14 and an output section 15 .
- the data acquisition unit 11 acquires data indicating characteristics of the power supply system 1 . Specifically, the data acquisition unit 11 obtains the operation time of the gate block 904 of the DC/DC converter 903 included in the power supply system 1, the capacity of the X capacitor 905 of the DC/DC converter 903, the impedance of the power supply cable, the power supply Data indicating the fusing characteristics of the fuse 906 included in the system 1 is acquired. The data acquisition unit 11 may acquire data by a user's input operation, or may receive data from another device or the like.
- the current waveform calculation unit 12 calculates the current waveform when the power supply system 1 is short-circuited based on the operation time of the gate block 904, the capacitance of the X capacitor 905, and the impedance of the power supply cable among the data acquired by the data acquisition unit 11. Calculate the current waveform.
- the current waveform calculator 12 detects the short circuit of the power supply system 1 based on the capacitance of the X capacitor 905 and the impedance of the power supply cable.
- the power feeding system 1 is calculated based on the capacitance of the X capacitor 905, the impedance of the power feeding cable, and the operating time of the gate block 904 Calculate the current waveform at the time of short circuit.
- the current waveform calculator 12 calculates the current waveform when the power supply system 1 is short-circuited by a simulation of a circuit equivalent to the power supply system 1 .
- the selection reference value calculator 13 calculates a reference value (selection reference value) for selecting the fuse 906 based on the current waveform calculated by the current waveform calculator 12 . Specifically, the selection reference value calculator 13 calculates the total amount of charge (It) flowing through the fuse 906 and the Joule integral value (I 2 t) when short-circuited.
- the fuse selection unit 14 selects the fuse 906 to be blown when a short circuit occurs. Specifically, the fuse selection unit 14 determines that the calculated total charge amount (It) exceeds the limit value of the total charge amount obtained from the fusing characteristics of the fuse 906, or the Joule integral value (I 2 t) is , select the fuse 906 that exceeds the limit value of the Joule integral value obtained from the fusing characteristics of the fuse 906 . For example, the fuse selection unit 14 selects a fuse based on information indicating the fusing characteristics of a plurality of fuses (fusing characteristics information).
- the fusing characteristics are, for example, characteristics (IT characteristics) based on the amount of charge (It) and characteristics (I 2 tT characteristics) based on the Joule integral value (I 2 t).
- the fuse selection unit 14 calculates the limit value of the total charge amount based on the IT characteristic, and calculates the limit value of the Joule integral value based on the I 2 tT characteristic.
- the fusing characteristics are not limited to these, and other characteristics may be used.
- the output unit 15 outputs the selection result of the fuse selection unit 14.
- the output unit 15 may transmit information indicating the selection result to another device, or may display a screen indicating the selection result.
- FIG. 3 is a flowchart showing an example of the flow of short circuit determination processing.
- the data acquisition unit 11 acquires data indicating the characteristics of the power supply system 1, which is an outdoor DC power supply system (step S101).
- the data indicating the characteristics of the power supply system 1 include the operation time of the gate block 904 of the DC/DC converter 903 included in the power supply system 1, the capacity of the X capacitor 905 of the DC/DC converter 903, the impedance of the power supply cable, and the power supply system. and fusing characteristics of the fuse 906 provided in 1.
- the current waveform calculator 12 determines whether or not the operation time of the gate block 904 is 100 ⁇ s or less (step S102). Note that 100 ⁇ s is a preset value as a predetermined threshold.
- the current waveform calculator 12 determines that the operation time of the gate block 904 is 100 ⁇ s or less (step S102: Yes), it calculates the current waveform (time constant) during a short circuit by simulation based on the capacitance of the capacitor and the cable impedance. (Step S103). This simulation is a simulation using an equivalent circuit to be described later.
- the selection reference value calculator 13 calculates the total charge amount (It) flowing through the fuse at the time of short circuit and the Joule integral value (I 2 t) (step S104). Then, the fuse selection unit 14 selects a fuse that can be blown during a short circuit based on the blowing characteristic information of the plurality of fuses (step S105).
- step S102 when the current waveform calculation unit 12 determines that the operation time of the gate block 904 is not 100 ⁇ s or less (step S102: No), the simulation based on the capacitor capacity, the cable impedance, and the operation time of the gate block , the current waveform (time constant) at the time of short circuit is calculated (step S106).
- the selection reference value calculator 13 calculates the total amount of charge (It) flowing in the circuit at the time of short circuit and the Joule integral value (I 2 t) (step S107). Then, the fuse selection unit 14 selects a fuse that can be blown during a short circuit based on the blowing characteristic information of the plurality of fuses (step S105).
- FIG. 4 is a diagram showing an outline of an equivalent circuit.
- Equivalent circuit 800 is used in steps S103 and S108 shown in FIG.
- the equivalent circuit 800 includes a DC/DC converter 803, a fuse 804, an RL series circuit 805, and a short-circuit switch 806.
- DC/DC converter 803 includes gate block 801 and X capacitor 802 .
- step S103 the current waveform calculator 12 calculates the total charges It and I 2 t flowing through the fuse 804 without considering the operation time of the gate block because the operation time of the gate block is short.
- step S108 the current waveform calculator 12 assumes that the charge from the X capacitor 802 and the charge from the gate block 801 flow to the fuse 804 because the operation time of the gate block is long.
- the total amount of charge It and I 2 t flowing through the fuse 804 is calculated according to the operation time of the block.
- FIG. 5 is a first diagram showing an example of a current waveform.
- a graph 701 is an example of the current waveform calculated in step S103.
- a current waveform 702 representing the current flowing through the fuse 804 and a current waveform 703 representing the current flowing through the gate block 801 are shown. In this case, almost no current flows through the gate block 801 , so the current waveform 702 matches the current waveform representing the current flowing through the X capacitor 802 .
- FIG. 6 is a second diagram showing an example of the current waveform.
- a graph 711 is an example of the current waveform calculated in step S108.
- a current waveform 712 representing the current flowing through the fuse 804 and a current waveform 713 representing the current flowing through the gate block 801 are shown.
- the current waveform representing the sum of the current flowing through the X capacitor 802 and the current flowing through the gate block 801 is the current waveform representing the current flowing through the fuse 804 .
- a fuse that melts at the time of a short circuit is selected in an outdoor DC power supply system with a long cable length. This can assist in the selection of fuses in the power supply system.
- the information processing apparatus 10 can be realized, for example, by causing a computer to execute a program describing the processing details described in the present embodiment.
- this "computer” may be a physical machine or a virtual machine on the cloud.
- the "hardware” described here is virtual hardware.
- the above program can be recorded on a computer-readable recording medium (portable memory, etc.), saved, or distributed. It is also possible to provide the above program through a network such as the Internet or e-mail.
- FIG. 7 is a diagram showing a hardware configuration example of the computer.
- the computer of FIG. 7 has a drive device 1000, an auxiliary storage device 1002, a memory device 1003, a CPU 1004, an interface device 1005, a display device 1006, an input device 1007, an output device 1008, etc., which are connected to each other via a bus B, respectively.
- a program that implements the processing in the computer is provided by a recording medium 1001 such as a CD-ROM or memory card, for example.
- a recording medium 1001 such as a CD-ROM or memory card
- the program is installed from the recording medium 1001 to the auxiliary storage device 1002 via the drive device 1000 .
- the program does not necessarily need to be installed from the recording medium 1001, and may be downloaded from another computer via the network.
- the auxiliary storage device 1002 stores installed programs, as well as necessary files and data.
- the memory device 1003 reads and stores the program from the auxiliary storage device 1002 when a program activation instruction is received.
- the CPU 1004 implements functions related to the device according to programs stored in the memory device 1003 .
- the interface device 1005 is used as an interface for connecting to the network.
- a display device 1006 displays a GUI (Graphical User Interface) or the like by a program.
- An input device 1007 is composed of a keyboard, a mouse, buttons, a touch panel, or the like, and is used to input various operational instructions.
- the output device 1008 outputs the calculation result.
- This specification describes at least an information processing device, a fuse selection method, and a program described in each of the following items.
- (Section 1) a data acquisition unit that acquires data indicating characteristics of the power supply system; a fuse selection unit that selects a fuse to be blown when a short circuit occurs in the power supply system based on the data; Information processing equipment.
- (Section 2) The data acquisition unit obtains the operation time of the gate block of the DC/DC converter provided in the power supply system, the capacity of the X capacitor of the DC/DC converter, the impedance of the power supply cable, and the fusing characteristics of the fuse provided in the power supply system. and obtaining said data indicative of The information processing device according to item 1.
- (Section 3) a current waveform calculator that calculates a current waveform when the power supply system is short-circuited based on the operation time of the gate block, the capacitance of the X capacitor, and the impedance of the power supply cable; a selection reference value calculation unit that calculates a charge amount (It) or a Joule integral value (I 2 t) flowing through the fuse during a short circuit based on the calculated current waveform, The fuse selection unit selects a fuse to be blown when the short circuit occurs, based on the calculated charge amount or the Joule integral value and the blowing characteristic of the fuse.
- the information processing device according to Item 2.
- the current waveform calculator calculates a current waveform when the power supply system is short-circuited based on the capacitance of the X capacitor and the impedance of the power supply cable. is calculated, and if the operation time of the gate block exceeds the threshold, the short circuit of the power supply system based on the capacitance of the X capacitor, the impedance of the power supply cable, and the operation time of the gate block calculating the current waveform at time;
- the information processing device according to Item 3.
- the fuse selection unit selects a fuse to be blown when the short circuit occurs, based on information indicating blowing characteristics of a plurality of fuses.
- the information processing device according to Item 4.
- the current waveform calculation unit calculates the current waveform when the power supply system is short-circuited by simulation in a circuit equivalent to the power supply system.
- the information processing apparatus according to any one of items 3 to 5.
- (Section 7) A computer implemented method comprising: obtaining data characterizing the power supply system; selecting, based on the data, a fuse to be blown in the event of a short circuit in the power supply system; Fuse selection method.
Abstract
Description
次に、情報処理装置10の動作について説明する。図3は、短絡判定処理の流れの一例を示すフローチャートである。
情報処理装置10は、例えば、コンピュータに、本実施の形態で説明する処理内容を記述したプログラムを実行させることにより実現可能である。なお、この「コンピュータ」は、物理マシンであってもよいし、クラウド上の仮想マシンであってもよい。仮想マシンを使用する場合、ここで説明する「ハードウェア」は仮想的なハードウェアである。
本明細書には、少なくとも下記の各項に記載した情報処理装置、ヒューズ選択方法およびプログラムが記載されている。
(第1項)
給電システムの特性を示すデータを取得するデータ取得部と、
前記データに基づいて、前記給電システムに短絡が発生した場合に溶断するヒューズを選択するヒューズ選択部と、を備える、
情報処理装置。
(第2項)
前記データ取得部は、前記給電システムが備えるDC/DCコンバータのゲートブロックの動作時間と、前記DC/DCコンバータのXコンデンサの容量と、給電ケーブルのインピーダンスと、前記給電システムが備えるヒューズの溶断特性と、を示す前記データを取得する、
第1項に記載の情報処理装置。
(第3項)
前記ゲートブロックの動作時間と、前記Xコンデンサの容量と、前記給電ケーブルのインピーダンスと、に基づいて、前記給電システムの短絡時における電流波形を算出する電流波形算出部と、
算出された前記電流波形に基づいて、短絡時にヒューズに流れる電荷量(It)またはジュール積分値(I2t)を算出する選択基準値算出部と、をさらに備え、
前記ヒューズ選択部は、算出された前記電荷量または前記ジュール積分値と、前記ヒューズの溶断特性と、に基づいて、前記短絡が発生した場合に溶断するヒューズを選択する、
第2項に記載の情報処理装置。
(第4項)
前記電流波形算出部は、前記ゲートブロックの動作時間が所定の閾値以下の場合には、前記Xコンデンサの容量と、前記給電ケーブルのインピーダンスと、に基づいて、前記給電システムの短絡時における電流波形を算出し、前記ゲートブロックの動作時間が前記閾値を超える場合には、前記Xコンデンサの容量と、前記給電ケーブルのインピーダンスと、前記ゲートブロックの動作時間と、に基づいて、前記給電システムの短絡時における前記電流波形を算出する、
第3項に記載の情報処理装置。
(第5項)
前記ヒューズ選択部は、複数のヒューズの溶断特性を示す情報に基づいて、前記短絡が発生した場合に溶断するヒューズを選択する、
第4項に記載の情報処理装置。
(第6項)
前記電流波形算出部は、前記給電システムと等価な回路におけるシミュレーションによって、前記給電システムの短絡時における前記電流波形を算出する、
第3項から第5項のいずれか1項に記載の情報処理装置。
(第7項)
コンピュータが実行する方法であって、
給電システムの特性を示すデータを取得するステップと、
前記データに基づいて、前記給電システムに短絡が発生した場合に溶断するヒューズを選択するステップと、を備える、
ヒューズ選択方法。
(第8項)
コンピュータを第1項から第6項のいずれか1項に記載の情報処理装置における各部として機能させるためのプログラム。
10 情報処理装置
11 データ取得部
12 電流波形算出部
13 選択基準値算出部
14 ヒューズ選択部
15 出力部
801 ゲートブロック
802 Xコンデンサ
803 DC/DCコンバータ
804 ヒューズ
805 RL直列回路
806 短絡スイッチ
901 整流装置(またはAC/DCコンバータ)
902 分電盤
903 DC/DCコンバータ
904 ゲートブロック
905 Xコンデンサ
906 ヒューズ
907 ケーブルインピーダンス
908 機器
1000 ドライブ装置
1001 記録媒体
1002 補助記憶装置
1003 メモリ装置
1004 CPU
1005 インタフェース装置
1006 表示装置
1007 入力装置
1008 出力装置
Claims (8)
- 給電システムの特性を示すデータを取得するデータ取得部と、
前記データに基づいて、前記給電システムに短絡が発生した場合に溶断するヒューズを選択するヒューズ選択部と、を備える、
情報処理装置。 - 前記データ取得部は、前記給電システムが備えるDC/DCコンバータのゲートブロックの動作時間と、前記DC/DCコンバータのXコンデンサの容量と、給電ケーブルのインピーダンスと、前記給電システムが備えるヒューズの溶断特性と、を示す前記データを取得する、
請求項1に記載の情報処理装置。 - 前記ゲートブロックの動作時間と、前記Xコンデンサの容量と、前記給電ケーブルのインピーダンスと、に基づいて、前記給電システムの短絡時における電流波形を算出する電流波形算出部と、
算出された前記電流波形に基づいて、短絡時にヒューズに流れる電荷量(It)またはジュール積分値(I2t)を算出する選択基準値算出部と、をさらに備え、
前記ヒューズ選択部は、算出された前記電荷量または前記ジュール積分値と、前記ヒューズの溶断特性と、に基づいて、前記短絡が発生した場合に溶断するヒューズを選択する、
請求項2に記載の情報処理装置。 - 前記電流波形算出部は、前記ゲートブロックの動作時間が所定の閾値以下の場合には、前記Xコンデンサの容量と、前記給電ケーブルのインピーダンスと、に基づいて、前記給電システムの短絡時における電流波形を算出し、前記ゲートブロックの動作時間が前記閾値を超える場合には、前記Xコンデンサの容量と、前記給電ケーブルのインピーダンスと、前記ゲートブロックの動作時間と、に基づいて、前記給電システムの短絡時における前記電流波形を算出する、
請求項3に記載の情報処理装置。 - 前記ヒューズ選択部は、複数のヒューズの溶断特性を示す情報に基づいて、前記短絡が発生した場合に溶断するヒューズを選択する、
請求項4に記載の情報処理装置。 - 前記電流波形算出部は、前記給電システムと等価な回路におけるシミュレーションによって、前記給電システムの短絡時における前記電流波形を算出する、
請求項3から5のいずれか1項に記載の情報処理装置。 - コンピュータが実行する方法であって、
給電システムの特性を示すデータを取得するステップと、
前記データに基づいて、前記給電システムに短絡が発生した場合に溶断するヒューズを選択するステップと、を備える、
ヒューズ選択方法。 - コンピュータを請求項1から6のいずれか1項に記載の情報処理装置における各部として機能させるためのプログラム。
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JP2009540777A (ja) * | 2006-06-08 | 2009-11-19 | デーン+シェーネ ゲーエムベーハ+ツェオー.カーゲー | 過電圧保護器に使用するための、好ましくはトリップボルトとして形成された付加的な機械式トリップを備えた過電流保護装置 |
JP2011243382A (ja) * | 2010-05-18 | 2011-12-01 | Koa Corp | 二次電池回路 |
JP2012150902A (ja) * | 2011-01-17 | 2012-08-09 | Koa Corp | 二次電池の保護回路 |
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