JPH02254901A - Service interruption detection system for ac electric rolling stock - Google Patents
Service interruption detection system for ac electric rolling stockInfo
- Publication number
- JPH02254901A JPH02254901A JP7346989A JP7346989A JPH02254901A JP H02254901 A JPH02254901 A JP H02254901A JP 7346989 A JP7346989 A JP 7346989A JP 7346989 A JP7346989 A JP 7346989A JP H02254901 A JPH02254901 A JP H02254901A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- winding
- primary winding
- converter
- service interruption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000005096 rolling process Methods 0.000 title 1
- 238000004804 winding Methods 0.000 claims abstract description 60
- 230000004907 flux Effects 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、パルス幅変調（ＰＷＭ）制御交直変換装置を
備えた交流電気車の停電検出方式に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a power outage detection method for an AC electric vehicle equipped with a pulse width modulation (PWM) controlled AC/DC converter.
（従来の技術）
従来、交流電気車の制御方式として、交流電源に主変圧
器を介して交直変換用の半導体電力変換装置を接続し、
この変換装置をＰＷＭ制御することにより変換装置の直
流端子に一定の直流電圧を発生させる方式が知られてい
る。(Prior Art) Conventionally, as a control method for AC electric cars, a semiconductor power conversion device for AC/DC conversion is connected to an AC power source via a main transformer.
A method is known in which a constant DC voltage is generated at a DC terminal of the converter by PWM control of the converter.
第２図はこのような変換装置を用いた交流電気車の主回
路の一例を示す図である。同図において、１は電車線で
あり、この電車ｌ；Ａ１には交流電力を受電するパンタ
グラフ２が接している。パンタグラフ２は主変圧器３の
一次巻線に接続されており、その二次巻線はＧＴＯ，ト
ランジスタ等の半導体素子により構成されたＰＷＭ制御
交直変換装置４の交流端子に接続されている。この変換
装置４の直流端子は、直流中間回路に設けられたコンデ
ンサ５を介してインバータ６の直流端子に接続され、イ
ンバータ６の交流出力端子は交流電動機７に接続されて
いる。また、主変圧器３の一次巻線両端には電圧検出用
変圧器１０の一次巻線が接続されており、その二次巻線
は制御回路１１及び停電検出回路１２に接続されている
。FIG. 2 is a diagram showing an example of the main circuit of an AC electric vehicle using such a converter. In the figure, 1 is an overhead contact line, and a pantograph 2 that receives AC power is in contact with this electric train 1;A1. The pantograph 2 is connected to a primary winding of a main transformer 3, and its secondary winding is connected to an AC terminal of a PWM control AC/DC converter 4 made up of semiconductor elements such as a GTO and a transistor. A DC terminal of this converter 4 is connected to a DC terminal of an inverter 6 via a capacitor 5 provided in a DC intermediate circuit, and an AC output terminal of the inverter 6 is connected to an AC motor 7. Further, the primary winding of a voltage detection transformer 10 is connected to both ends of the primary winding of the main transformer 3, and its secondary winding is connected to a control circuit 11 and a power outage detection circuit 12.
この種の回路方式においては、制御回路１１によって変
換装置４をＰＷＭ制御することにより、電源電圧に対応
した交流電圧を発生させて主変圧器３の二次巻線電流の
大きさ及び力率を調整し、直流中間回路のコンデンサ５
の電圧を所定の値に制御している。In this type of circuit system, the control circuit 11 performs PWM control on the converter 4 to generate an AC voltage corresponding to the power supply voltage and adjust the magnitude and power factor of the secondary winding current of the main transformer 3. Adjust and DC intermediate circuit capacitor 5
The voltage is controlled to a predetermined value.
次いで、第３図は、上記システムにおいて電車線１の交
流電源に停電が発生した場合の動作を示す図であり、同
図においてａは電車線１の電圧、ｂは変換装置４の交流
端子電圧、Ｃは変換装置４の交流側電流、ｄは停電検出
回路１２の出力である。Next, FIG. 3 is a diagram showing the operation when a power outage occurs in the AC power supply of the overhead contact line 1 in the above system, and in the figure, a represents the voltage of the overhead contact line 1, and b represents the AC terminal voltage of the converter 4. , C is the AC side current of the converter 4, and d is the output of the power failure detection circuit 12.
いま、第３図の時刻ｔ工において停電が発生すると、主
変圧器３の一次巻線電圧は図に示す変換装置４の交流端
子電圧すとなる。この一次巻線電圧波形の変化を停電検
出回路１２が時刻ｔ２において検知し、時刻ｔ、で変換
装置４の運転を停止する。Now, when a power outage occurs at time t in FIG. 3, the primary winding voltage of the main transformer 3 becomes the AC terminal voltage of the converter 4 shown in the figure. The power failure detection circuit 12 detects this change in the primary winding voltage waveform at time t2, and stops the operation of the converter 4 at time t.
しかして、この種のシステムでは、電源が喪失しても変
換袋ｖ１４自身が電源となって運転を継続する可能性が
あり、電車線１には第３図ａに示す如く時刻ｔ□からｔ
３の間に高次高調波を多く含んだ電圧が現われることに
なる。このような高調波電圧は、同一き電区間に存在す
る他励整流器を持つ他の電気車の半導体素子スナバ回路
の焼損を招くおそれがあるため、停電発生を高速に検知
して時刻ｔ０以後できるだけ速やかに変換装置４の運転
を停止する必要がある。However, in this type of system, even if the power is lost, the conversion bag v14 itself may become a power source and continue operation, and the contact line 1 has a power supply from time t□ to t as shown in FIG. 3a.
3, a voltage containing many high-order harmonics appears. Such harmonic voltages may cause burnout of the semiconductor element snubber circuits of other electric cars with separately excited rectifiers existing in the same feeder section, so the occurrence of a power outage should be detected quickly and the power outage should be detected as soon as possible after time t0. It is necessary to immediately stop the operation of the converter 4.
ここで、第４図は停電検出回路１２の構成を示す図であ
り、以下、この第４図に基づき従来の停電検知方式を説
明すると、第３図における電圧検出用変圧器１０から得
られた電圧信号Ｖｓはバンドパスフィルタ１２ａに入力
される。なお、このバンドパスフィルタ１２ａは、主変
圧器３の一次巻線電圧における変換装置４のパルス幅変
調周波数成分と同一の成分を抽出するように設定される
。バンドパスフィルタ１２ａの出力はコンパレータ１２
ｂに入力されており、このコンパレータ１２ｂにおいて
停電検出レベル設定器１２ｃによる設定レベルと比較す
ることにより、停電検出信号が生成されて制御回路１１
に出力されるものである。Here, FIG. 4 is a diagram showing the configuration of the power outage detection circuit 12. Hereinafter, the conventional power outage detection method will be explained based on this FIG. The voltage signal Vs is input to the bandpass filter 12a. Note that this bandpass filter 12a is set to extract the same component as the pulse width modulation frequency component of the converter 4 in the primary winding voltage of the main transformer 3. The output of the bandpass filter 12a is the comparator 12
By comparing it with the level set by the power failure detection level setter 12c in this comparator 12b, a power failure detection signal is generated and sent to the control circuit 11.
This is what is output to.
（発明が解決しようとする課題） 上述した高調波成分による停電検出方式では。(Problem to be solved by the invention) In the power outage detection method using harmonic components described above.
正常運転時には検出電圧の高調波成分ができるだけ少な
く、停電時はより大きく検出できることが望ましい。It is desirable that the harmonic components of the detected voltage be as small as possible during normal operation, and larger during power outage.
しかしながら従来においては、主変圧器３の一次巻線電
圧の検出にその両端に接続した検出用の変圧器１０を用
いていたため、正常時は正弦波の電圧波形を検出するが
、停電時に同一き電区間内に運転中の他の電車が存在す
る場合、電車間に電流が流れるためこの電流による変圧
器−次漏れリアクタンス降下が発生し、主変圧器３の鉄
心磁束により発生する誘起電圧が一次巻線端子部では前
記電流ないし一次漏れリアクタンス降下の影響を受ける
ことによって目的とする高調波成分が減少してしまい、
停電検出回路１２の感度が低下してしまうという問題が
あった。However, in the past, the detection transformer 10 connected to both ends of the main transformer 3 was used to detect the primary winding voltage of the main transformer 3, so a sine wave voltage waveform was detected during normal times, but the same voltage waveform was detected during a power outage. When there are other trains operating within the electrical section, current flows between the trains, and this current causes a drop in the transformer leakage reactance, and the induced voltage generated by the core magnetic flux of the main transformer 3 increases. In the winding terminal section, the target harmonic component is reduced due to the influence of the current or primary leakage reactance drop.
There was a problem in that the sensitivity of the power failure detection circuit 12 decreased.
本発明は上記問題点を解消するために提案されたもので
、その目的とするところは、停電時における主変圧器の
一次巻線電流の影響を受けず、しかも−次、二次各巻線
による漏れ磁束が鎖交しないような鉄心位置に高調波検
出用の補助巻線を設けることにより、停電検出感度を高
めた交流電気車の停電検出方式を提供することにある。The present invention was proposed in order to solve the above problems, and its purpose is to avoid being affected by the primary winding current of the main transformer during a power outage, and to avoid the influence of the primary winding current of the main transformer during a power outage. An object of the present invention is to provide a power outage detection method for an AC electric vehicle that increases power outage detection sensitivity by providing an auxiliary winding for harmonic detection at a core position where leakage magnetic flux does not interlink.
（課題を解決するための手段）
上記目的を達成するため、本発明は、電車線を介して一
次巻線が交流電源に接続された主変圧器と、この主変圧
器の二次巻線に接続されたパルス幅変調制御交直変換装
置とを備えた交流電気車であって、前記一次巻線電圧か
ら、前記交直変換装置の交流側出力電圧に含まれる高調
波成分と等しい成分を検出してこの高調波成分が所定の
値以上になったことにより前記交流電源の停電を検出す
る交流電気車の停電検出方式において、前記主変圧器の
一次巻線及び二次巻線による漏れ磁束が鎖交しない鉄心
位置に補助巻線を設け、この補助巻線により前記一次巻
線電圧の高調波成分を検出することを特徴とする特
（作用）
本発明によれば、主変圧器の鉄心に補助巻線を直接取付
けて一次巻線電圧の高調波成分を検出するので、停電時
に一次巻線電流によるリアクタンス降下の影響を受ける
ことなく高感度で高調波成分を検出することができる。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a main transformer whose primary winding is connected to an AC power supply via an overhead contact line, and a secondary winding of this main transformer. an AC electric vehicle equipped with a pulse width modulation controlled AC/DC converter connected to the AC/DC converter, wherein a component equal to a harmonic component included in an AC side output voltage of the AC/DC converter is detected from the primary winding voltage; In a power outage detection method for an AC electric vehicle that detects a power outage of the AC power supply when this harmonic component exceeds a predetermined value, leakage magnetic flux from the primary and secondary windings of the main transformer is interlinked. According to the present invention, an auxiliary winding is provided at a position of the core of the main transformer, and the harmonic component of the primary winding voltage is detected by the auxiliary winding. Since the harmonic components of the primary winding voltage are detected by directly attaching the wire, the harmonic components can be detected with high sensitivity without being affected by reactance drop due to the primary winding current during a power outage.
また、補助巻線の位置は一次巻線及び二次巻線による漏
れ磁束が鎖交しないような位置に選ばれるため、平常時
のパルス幅変調制御交直変換装置による変換動作にも何
ら支障がない。In addition, since the position of the auxiliary winding is selected so that the leakage magnetic flux from the primary winding and secondary winding does not interlink, there is no problem with the conversion operation of the pulse width modulation control AC/DC converter during normal operation. .
（実施例） 以下、図に沿って本発明の一実施例を説明する。(Example) An embodiment of the present invention will be described below with reference to the drawings.
第１図はこの実施例が適用される交流電気車の主回路を
示しており、第２図と同一の祷成要素には同一の符号を
付して詳述を省略し、以下、異なる点を中心に説明する
。すなわち、この実施例における主変圧器３０は、一次
巻線３１と、二次巻線３２と、一次巻線電圧検出用の補
助巻線３３とを備えている。そして、補助巻線３３の出
力端子は制御回路１１及び停電検出回路１２に接続され
ている。Fig. 1 shows the main circuit of an AC electric vehicle to which this embodiment is applied, and the same components as in Fig. 2 are given the same reference numerals and detailed explanations are omitted. I will mainly explain. That is, the main transformer 30 in this embodiment includes a primary winding 31, a secondary winding 32, and an auxiliary winding 33 for primary winding voltage detection. The output terminal of the auxiliary winding 33 is connected to the control circuit 11 and the power failure detection circuit 12.
ここで、補助巻線３３は、一次巻線３１及び二次巻線３
２による漏れ磁束が鎖交しないような鉄心位置に取付ら
れており、これによって通常動作時には主変圧器３０の
一次入力電圧に比例した電圧が補助巻線３３から出力さ
れ、制御回路１１及び変換装置４によるＰＷＭ制御によ
ってその変換装置４の直流端子には所定の直流電圧が現
われる。Here, the auxiliary winding 33 includes the primary winding 31 and the secondary winding 3.
The auxiliary winding 33 outputs a voltage proportional to the primary input voltage of the main transformer 30 during normal operation, and is connected to the control circuit 11 and the converter. 4, a predetermined DC voltage appears at the DC terminal of the converter 4.
一方、交流電源の停電時において、補助巻線３３は、従
来のように一次巻線電流によるリアクタンス降下の影響
を受けることなく変換装置４の交流側出力電圧（主変圧
器３０の一次巻線３１の電圧）に対応した電圧波形を出
力する。そして、この電圧波形は高次高調波を含んだも
のであるから、停電検出回路１２の動作により停電の発
生を検出することができ、以後は制御回路１１を介して
変換装置４の運転を停止させればよいものである。On the other hand, during a power outage of the AC power supply, the auxiliary winding 33 is not affected by the reactance drop due to the primary winding current as in the past, and the AC side output voltage of the converter 4 (the primary winding 31 of the main transformer 30 outputs a voltage waveform corresponding to the voltage of Since this voltage waveform includes high-order harmonics, the occurrence of a power outage can be detected by the operation of the power outage detection circuit 12, and thereafter the operation of the converter 4 is stopped via the control circuit 11. All you have to do is let it happen.
（発明の効果）
以上のように本発明によれば、停電検出のために主変圧
器の一次巻線電圧に含まれる高調波成分を検出する手段
として、主変圧器の一次及び二次巻線による漏れ磁束が
鎖交しない鉄心位置に補助巻線を直接取付けたことによ
り、停電時に同一き電区間内の電車間に電流が流れた場
合でもその電流の影響を受けずに高調波成分を抽出し、
停電を確実に検出できるという効果がある。(Effects of the Invention) As described above, according to the present invention, as a means for detecting harmonic components included in the primary winding voltage of the main transformer for power outage detection, By attaching the auxiliary winding directly to the core location where leakage flux does not interlink with the current, even if current flows between trains in the same feeding section during a power outage, harmonic components can be extracted without being affected by the current. death,
This has the effect of being able to reliably detect power outages.
第１図は本発明の一実施例が適用される交流電気車の主
回路の構成図、第２図は従来の技術を説明するための交
流電気車の主回路の構成図、第３図はその動作を説明す
るための波形図、第４図は停電検出回路の構成図である
。
１・・・電車線 ２・・・パンタグラフ４・・
・パルス幅変調制御交直変換装置５・・・コンデンサ
６・・・インバータ７・・・交流電動機 １１
・・・制御回路１２・・・停電検出回路 ３０・・・
主変圧器３１・・・一次巻線 ３２・・・二次巻
線３３・・・補助巻線
特許出願人 富士電機株式会社
代理人 弁理士 森 １）雄 −
２，７１ｏン２クラ？
１１：Ｈ轡絣
１２：滓者禮シ＃謬
［図
第
図
第
図
第
図FIG. 1 is a configuration diagram of the main circuit of an AC electric vehicle to which an embodiment of the present invention is applied, FIG. 2 is a configuration diagram of the main circuit of an AC electric vehicle for explaining the conventional technology, and FIG. A waveform diagram for explaining the operation, and FIG. 4 is a configuration diagram of the power failure detection circuit. 1... Tram line 2... Pantograph 4...
・Pulse width modulation control AC/DC converter 5...Capacitor
6... Inverter 7... AC motor 11
...Control circuit 12...Power outage detection circuit 30...
Main transformer 31...Primary winding 32...Secondary winding 33...Auxiliary winding Patent applicant Fuji Electric Co., Ltd. agent Patent attorney Mori 1) Male - 2,71 on 2 Cla? 11:H Kasuri 12:Resistance #False [Figure Figure Figure Figure Figure
Claims (1)
器と、この主変圧器の二次巻線に接続されたパルス幅変
調制御交直変換装置とを備えた交流電気車であって、前
記一次巻線電圧から、前記交直変換装置の交流側出力電
圧に含まれる高調波成分と等しい成分を検出してこの高
調波成分が所定の値以上になったことにより前記交流電
源の停電を検出する交流電気車の停電検出方式において
、前記主変圧器の一次巻線及び二次巻線による漏れ磁束
が鎖交しない鉄心位置に補助巻線を設け、この補助巻線
により前記一次巻線電圧の高調波成分を検出することを
特徴とする交流電気車の停電検出方式。An AC electric vehicle comprising a main transformer whose primary winding is connected to an AC power supply via a contact wire, and a pulse width modulation controlled AC/DC converter connected to the secondary winding of the main transformer. , detecting a component equal to a harmonic component included in the AC side output voltage of the AC/DC converter from the primary winding voltage, and causing a power outage of the AC power source when this harmonic component exceeds a predetermined value; In a power outage detection method for an AC electric vehicle, an auxiliary winding is provided at a position of the iron core where the leakage flux from the primary winding and secondary winding of the main transformer does not interlink, and this auxiliary winding allows the primary winding voltage to be A power outage detection method for AC electric vehicles characterized by detecting harmonic components of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7346989A JPH02254901A (en) | 1989-03-24 | 1989-03-24 | Service interruption detection system for ac electric rolling stock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7346989A JPH02254901A (en) | 1989-03-24 | 1989-03-24 | Service interruption detection system for ac electric rolling stock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02254901A true JPH02254901A (en) | 1990-10-15 |
Family
ID=13519164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7346989A Pending JPH02254901A (en) | 1989-03-24 | 1989-03-24 | Service interruption detection system for ac electric rolling stock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02254901A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699779A (en) * | 2015-12-31 | 2016-06-22 | 北京交通大学 | Cascaded H-bridge type traction network impedance test harmonic generator and test method |
-
1989
- 1989-03-24 JP JP7346989A patent/JPH02254901A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699779A (en) * | 2015-12-31 | 2016-06-22 | 北京交通大学 | Cascaded H-bridge type traction network impedance test harmonic generator and test method |
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