JP3036824B2 - DC capacitor with built-in internal failure detection device - Google Patents
DC capacitor with built-in internal failure detection deviceInfo
- Publication number
- JP3036824B2 JP3036824B2 JP2320226A JP32022690A JP3036824B2 JP 3036824 B2 JP3036824 B2 JP 3036824B2 JP 2320226 A JP2320226 A JP 2320226A JP 32022690 A JP32022690 A JP 32022690A JP 3036824 B2 JP3036824 B2 JP 3036824B2
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- current
- detection device
- built
- failure detection
- 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.)
- Expired - Fee Related
Links
Landscapes
- Protection Of Static Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は充放電装置やインバーターなどの直流電源と
して使用する内部故障検出装置を内蔵した直流コンデン
サに関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC capacitor having a built-in internal failure detection device used as a DC power supply for a charge / discharge device or an inverter.
従来の技術 充放電装置やインバーターなどの直流電源には大容量
の高圧直流コンデンサが使用されている。2. Description of the Related Art Large-capacity high-voltage DC capacitors are used in DC power supplies such as charge / discharge devices and inverters.
万一、このコンデンサが内部故障により短絡となると
充電されたエネルギーが内部で放電して、このエネルギ
ーによりコンデンサが爆発噴油して大きな被害を発生す
ることがある。Should the capacitor become short-circuited due to an internal failure, the charged energy is discharged internally, and this energy may explode and explode the capacitor, causing serious damage.
これを防止するためコンデンサを小容量に分割して個
々のコンデンサに限流抵抗や限流コイルを直流接続して
故障コンデンサで大きな放電エネルギーを生じないよう
対策されている。In order to prevent this, a capacitor is divided into small capacitors, and a current limiting resistor or a current limiting coil is DC-connected to each capacitor so that a large discharge energy is not generated in the failed capacitor.
発明が解決しようとする課題 しかし、上記のようにコンデンサを小容量に分割する
ことはコスト高となり、設置スペースも大きくなるなど
不利な点が多く、また限流抵抗や限流コイルの挿入は回
路インピーダンスの増大により、装置としての性能を低
下させたり、損失が増大して好ましくないため使用でき
ない場合が多いのが実情である。However, dividing a capacitor into small capacitors as described above has many disadvantages, such as high cost and large installation space, and insertion of a current-limiting resistor and a current-limiting coil requires a circuit. The fact is that in many cases, the performance of the device is lowered due to the increase in the impedance, and the loss is increased, which is not preferable.
課題を解決するための手段 コンデンサの内部故障を早期に検出して、短絡にいた
る前に電源より開放すれば、故障コンデンサの爆発噴油
による被害は防止できるので、この故障の早期検出を行
うものである。Means to solve the problem If the internal failure of the capacitor is detected early and opened from the power supply before short-circuiting, the damage of the failed capacitor due to the explosion oil can be prevented. It is.
すなわち、内部素子をほぼ同等容量になるように２群
に分け、これらを並列接続し、２群の各群の素子群の電
流を検出する変流器を内蔵したコンデンサにおいて、上
流変流器は二次巻線と２組の一次巻線とからなる内部故
障検出装置を構成し、上記の各素子群の電流が一次巻線
を差動的に流れ、二次巻線に発生する電流を検出する内
部故障検出装置を内蔵した直流コンデンサである。That is, the internal current elements are divided into two groups so as to have substantially the same capacity, these are connected in parallel, and in the capacitor having a built-in current transformer for detecting the current of the element groups of the two groups, the upstream current transformer is An internal fault detection device consisting of a secondary winding and two sets of primary windings is configured. The current of each element group flows differentially through the primary winding and detects the current generated in the secondary winding. This is a DC capacitor with a built-in internal failure detection device.
作用 直流用コンデンサではあるが、使用中は充放電を行っ
ているため、常時リプル電流またはパルス電流が流れて
いるので、この電流を他の健全素子群と比較して差電流
を検出することにより、コンデンサの故障を検出する。Function Although it is a DC capacitor, it is charged and discharged during use, so a ripple current or pulse current always flows.This current is compared with other healthy element groups to detect a difference current. Detects capacitor failure.
実施例 本発明の一実施例を第１図に示す。Embodiment An embodiment of the present invention is shown in FIG.
１、２はコンデンサ内部の素子群を示す。３は２組の
一次巻線を備えた変流器であり、これらには素子群１、
２の電流が差動的に流れるよう接続されている。この二
次巻線の端子４、５はコンデンサケース６の外方に引出
されている。Reference numerals 1 and 2 denote element groups inside the capacitor. Numeral 3 denotes a current transformer having two sets of primary windings.
2 are connected so as to flow differentially. The terminals 4 and 5 of the secondary winding are drawn out of the capacitor case 6.
このコンデンサ７は第２図に示すように交流電源８よ
りダイオード９を通じて充電される直流コンデンサであ
り、負荷10は放電装置またはインバーター装置のごとき
ものである。コンデンサに内蔵された変流器３の二次端
子はケース外に引出されこれに電流または電圧を検知し
て動作する継電器11が接続されている。The capacitor 7 is a DC capacitor charged by an AC power supply 8 through a diode 9 as shown in FIG. 2, and the load 10 is a discharge device or an inverter device. The secondary terminal of the current transformer 3 built in the capacitor is drawn out of the case and connected to a relay 11 which operates by detecting current or voltage.
コンデンサ内部の素子群１、２は高圧コンデンサでは
図のように複数の素子が直列接続されて構成されている
ので、一部の素子が絶縁破壊して短絡すると、この素子
群の静電容量は変化するため、コンデンサの充放電によ
り発生するリプル電流またはパルス電流は変化すること
になる。内蔵された変流器３の２組の一次巻線には素子
群１、２の電流が差動的に流れるように接続されている
ので、素子群１および２ともほぼ同等な容量を有するの
で健全な場合には各素子群の電流は打ち消されて、二次
巻線には電流、電圧は発生しないが、もし素子群１の素
子の一部が破壊短絡すれば、素子群１の電流は素子群２
の電流より大きくなり変流器３内部で打ち消されなくな
るため、二次巻線に電流、電圧が発生する。Since the element groups 1 and 2 in the capacitor are composed of a plurality of elements connected in series as shown in the figure in a high-voltage capacitor, if a short circuit occurs due to dielectric breakdown of some elements, the capacitance of this element group becomes As a result, the ripple current or the pulse current generated by charging and discharging the capacitor changes. Since two sets of primary windings of the built-in current transformer 3 are connected so that the currents of the element groups 1 and 2 flow differentially, the element groups 1 and 2 have substantially the same capacity. When sound, the current of each element group is negated, and no current or voltage is generated in the secondary winding. However, if a part of the elements of element group 1 is broken and short-circuited, the current of element group 1 is reduced. Element group 2
, And is not canceled inside the current transformer 3, so that current and voltage are generated in the secondary winding.
これを継電器11にて検知して接点信号を得て、これに
より電源を開放すれば、コンデンサの故障はこれ以上進
展することなく、爆発噴油による被害の発生は未然に防
止し得る。If this is detected by the relay 11 and a contact signal is obtained and the power supply is opened by this, the failure of the capacitor will not progress further and the occurrence of damage due to the explosion oil can be prevented beforehand.
素子群の電流検出として、個々の素子群に個別に変流
器を取り付けて、この二次側の差電流を検出する方法も
あるが、直流コンデンサの場合には電流の直流分により
変流器の鉄心が偏磁されて、特性が悪くなるため、検出
精度が低下して好ましくなく、本発明の方式はこの点で
大いに有利である。As a method for detecting the current of the element group, there is a method of separately installing a current transformer in each element group and detecting the difference current on the secondary side.However, in the case of a DC capacitor, the current transformer is determined by the DC component of the current. Since the iron core is demagnetized and the characteristics deteriorate, the detection accuracy is lowered, which is not preferable. The method of the present invention is very advantageous in this respect.
なお、変流器は一般の貫通形のものを用いて各素子群
のリード線をお互いに逆方向となるよう貫通させてもよ
いことは勿論である。It is a matter of course that the current transformer may be of a general penetration type and the lead wires of each element group may be penetrated so as to be opposite to each other.
発明の効果 上記のように本発明の方式を使用することにより、コ
ンデンサの故障は初期の一部素子の破壊の段階で検出さ
れ、電源開放することにより、コンデンサ短絡にいたり
爆発噴油による被害を生じることが防止でき、安全性が
著しく向上するなどの効果があり、工業的ならびに実用
的価値大である。Effect of the Invention As described above, by using the method of the present invention, a capacitor failure is detected at the early stage of destruction of some elements. This has the effect of preventing the occurrence of such a problem and significantly improving the safety, and is of great industrial and practical value.
第１図は本発明の一実施例の直流コンデンサの説明図、
第２図は本発明の直流コンデンサの接続回路例である。 １、2:コンデンサ内部の素子群 3:変流器 7:直流コンデンサFIG. 1 is an explanatory view of a DC capacitor according to one embodiment of the present invention,
FIG. 2 is an example of a connection circuit of a DC capacitor according to the present invention. 1, 2: element group inside capacitor 3: current transformer 7: DC capacitor
フロントページの続き (56)参考文献 特開 平１−255433（ＪＰ，Ａ) 特開 昭61−106070（ＪＰ，Ａ) 特開 昭64−39228（ＪＰ，Ａ) 実開 昭58−196540（ＪＰ，Ｕ) 実開 昭56−44536（ＪＰ，Ｕ) 実開 昭52−120928（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02H 3/08 - 3/28 H02H 7/00 - 7/122 H02M 7/48 Continuation of the front page (56) References JP-A-1-255433 (JP, A) JP-A-61-106070 (JP, A) JP-A-64-39228 (JP, A) JP-A-58-196540 (JP) , U) Shokai Sho 56-44536 (JP, U) Shokai Sho 52-1220928 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) H02H 3/08-3/28 H02H 7/00-7/122 H02M 7/48
Claims (1)
に分け、これらを並列接続し、２群の各群の素子群の電
流を検出する変流器を内蔵したコンデンサにおいて、 上流変流器は二次巻線と２組の一次巻線とからなる内部
故障検出装置を構成し、上記の各素子群の電流が一次巻
線を差動的に流れ、二次巻線に発生する電流を検出する
内部故障検出装置を構成したことを特徴とする内部故障
検出装置を内蔵した直流コンデンサ。An internal element is divided into two groups so as to have substantially the same capacity, these are connected in parallel, and a capacitor having a built-in current transformer for detecting the current of the element group of each of the two groups is provided. The current transformer constitutes an internal failure detection device including a secondary winding and two sets of primary windings, and the current of each of the above-described element groups flows differentially through the primary winding and is generated in the secondary winding. A DC capacitor having a built-in internal failure detection device, comprising an internal failure detection device for detecting a current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2320226A JP3036824B2 (en) | 1990-11-22 | 1990-11-22 | DC capacitor with built-in internal failure detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2320226A JP3036824B2 (en) | 1990-11-22 | 1990-11-22 | DC capacitor with built-in internal failure detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04190624A JPH04190624A (en) | 1992-07-09 |
| JP3036824B2 true JP3036824B2 (en) | 2000-04-24 |
Family
ID=18119136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2320226A Expired - Fee Related JP3036824B2 (en) | 1990-11-22 | 1990-11-22 | DC capacitor with built-in internal failure detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3036824B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI120224B (en) | 2008-05-29 | 2009-07-31 | Teknoware Oy | Procedures and arrangements in connection with safety luminaires |
| EP2677617B1 (en) * | 2012-05-22 | 2019-12-11 | ALSTOM Transport Technologies | Power supply circuit for an on board energy source or storage device and particularly for super-capacitor storage unit |
| CN103558479A (en) * | 2013-11-15 | 2014-02-05 | 国家电网公司 | Method for monitoring failures inside transformer |
-
1990
- 1990-11-22 JP JP2320226A patent/JP3036824B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04190624A (en) | 1992-07-09 |
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