JPS6338809B2 - - Google Patents
Info
- Publication number
- JPS6338809B2 JPS6338809B2 JP54007785A JP778579A JPS6338809B2 JP S6338809 B2 JPS6338809 B2 JP S6338809B2 JP 54007785 A JP54007785 A JP 54007785A JP 778579 A JP778579 A JP 778579A JP S6338809 B2 JPS6338809 B2 JP S6338809B2
- Authority
- JP
- Japan
- Prior art keywords
- breaker
- disconnector
- shield
- resistor
- current
- 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
Links
- 238000010586 diagram Methods 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 4
- 239000000872 buffer Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
Landscapes
- Direct Current Feeding And Distribution (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Description
【発明の詳細な説明】
この発明は例えば大容量発電所の送電線の事故
電流しや断に用いるしや断装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shearing device used for shearing fault currents in power transmission lines of large-capacity power plants, for example.
一般に発電所近傍の送電線の事故電流は、直流
分を多く含むため、その零ラインに対して極端に
非対称な波形となり、零点通過が電流波形の何周
期にもわたつて発生しない場合がある。当初、前
述のような波形を有する事故電流例えば短絡電流
のしや断は低圧側の発電機保護しや断器のみに関
して考慮されていた。ところが大容量例えば
500MVA級以上の発電機に対し高品質の主変圧
器が設置されるようになつて、発電機の逆相リア
クタンスと電機子抵抗との比に対し、変圧器を含
んだ合成の短絡電流路のリアクタンスと抵抗との
比が、極めてわずかしかずれないようになつてか
らは、変圧器の高圧側でも何周期にもわたつて電
流零点が生じないような短絡電流を考慮する必要
がでてきた。 In general, fault currents in power transmission lines near power plants contain a large amount of direct current, resulting in waveforms that are extremely asymmetrical with respect to the zero line, and zero-point crossings may not occur over many cycles of the current waveform. Initially, fault currents such as short-circuit currents having waveforms such as those described above were considered only for generator protection shields and disconnectors on the low-voltage side. However, for example, large capacity
As high-quality main transformers have been installed for generators of 500 MVA class or higher, the ratio of the negative sequence reactance of the generator to the armature resistance is Since the ratio of reactance to resistance has become very small, it has become necessary to consider short-circuit currents that do not cause a current zero point over many cycles even on the high-voltage side of the transformer.
このような短絡電流を、従来のしや断器例えば
パツフア型ガスしや断器、または２圧式ガスしや
断器あるいは空気しや断器でしや断する場合、消
弧媒体の吹付時間からくる制約により短絡電流を
しや断することの可能な時間に制限のあるもので
は、アーク電圧を極めて速やかに回路電圧以上に
上昇させるか、消弧媒体の吹付時間を大幅に増加
させなければならない。従つて、しや断器の消弧
室の構造設計の問題となり、有効な手段ではな
い。また、一方では真空しや断器の大容量化が進
み、真空しや断器の特長であるしや断装置の縮小
化、無保守化、高信頼度化等が相まつて、上記波
形の短絡電流をしや断するために、真空しや断器
を用いることが可能になれば非常に有利である。
しかし、真空しや断器のアーク電圧は非常に低い
ので、上記波形の短絡電流をしや断することがで
きない。 When such a short-circuit current is interrupted by a conventional breaker, such as a puffer-type gas breaker, a two-pressure gas breaker, or an air breaker, the arc-extinguishing medium is sprayed for a short time. In cases where the time during which the short circuit current can be extinguished is limited due to constraints such as . Therefore, this poses a problem in the structural design of the arc extinguishing chamber of the arc breaker, and is not an effective means. On the other hand, the capacity of vacuum shield disconnectors has been increasing, and the characteristics of vacuum shield disconnectors, such as miniaturization, maintenance-free, and high reliability, have combined to reduce short circuits in the above waveform. It would be very advantageous if it were possible to use a vacuum interrupter to interrupt the current.
However, since the arc voltage of a vacuum shield breaker is very low, it is not possible to interrupt the short circuit current having the above waveform.
この発明はこのような点にかんがみなされたも
ので、電流零点のない事故電流を速やかにしや断
することができるしや断装置を提供することを目
的とする。 The present invention has been made in consideration of these points, and an object of the present invention is to provide a shear breaker that can quickly cut off a fault current without a current zero point.
以下この発明の一実施例について図面を参照し
て説明する。すなわち第１図に示すように、真空
しや断器１（以下第１しや断器１と称す）に、真
空しや断器以外で真空しや断器よりアーク電圧の
高いしや断器２（以下第２しや断器２と称す）が
直列に接続されている。さらに第２しや断器２に
並列に、第２図に示すように温度Ｔの増加に対し
て抵抗値Ｒが下に凸で非線形に増加するような抵
抗値−温度特性を有する抵抗３が接続されてい
る。 An embodiment of the present invention will be described below with reference to the drawings. In other words, as shown in Fig. 1, the vacuum shield breaker 1 (hereinafter referred to as the first shield breaker 1) is equipped with a vacuum shield breaker other than the vacuum shield breaker, which has a higher arc voltage than the vacuum shield breaker. 2 (hereinafter referred to as second breaker 2) are connected in series. Furthermore, a resistor 3 is connected in parallel to the second shingle breaker 2 and has a resistance value-temperature characteristic such that the resistance value R increases non-linearly in a downwardly convex manner as the temperature T increases, as shown in FIG. It is connected.
このような構成のしや断装置に、電流零点のな
い短絡電流が流れた場合、最初に第２しや断器２
が開動作し、短絡電流が抵抗３に転流され、抵抗
３の限流作用により電流零点が作られ、続いて第
１しや断器１を開極することにより、短絡電流が
しや断される。この場合抵抗３として第２図に示
すような抵抗値−温度特性を有する非線形抵抗を
用いているので、次のような効果が得られる。す
なわち、第２しや断器から抵抗３へ、短絡電流を
容易に転流させるためには、抵抗３の抵抗値が小
さければ小さいほどよい。このときの抵抗３の温
度をT1とし、抵抗値をR1とする。そして抵抗３
へ転流した後、抵抗３はジユール熱により発熱し
抵抗３の温度はT1からT2へと上昇し、短絡電流
は限流作用により電流零点が形成される。そのと
きの抵抗３の抵抗値はR2となり、この抵抗値R2
が大きければ大きいほど限流作用は大きくなる。 When a short-circuit current with no current zero flows through a shingle breaker with such a configuration, first the second shunt breaker 2
opens, the short-circuit current is commutated to the resistor 3, a current zero point is created by the current limiting action of the resistor 3, and then by opening the first shield breaker 1, the short-circuit current is short-circuited. be done. In this case, since a nonlinear resistor having resistance value-temperature characteristics as shown in FIG. 2 is used as the resistor 3, the following effects can be obtained. That is, in order to easily commutate the short-circuit current from the second breaker to the resistor 3, the smaller the resistance value of the resistor 3, the better. The temperature of the resistor 3 at this time is T1 , and the resistance value is R1 . and resistance 3
After the current is commutated to , the resistor 3 generates heat due to Joule heat, the temperature of the resistor 3 rises from T 1 to T 2 , and a current zero point is formed in the short circuit current due to the current limiting action. The resistance value of resistor 3 at that time is R 2 , and this resistance value R 2
The larger the value, the greater the current limiting effect.
第３図は前述したこの発明の具体的実施例を示
すものである。前述した第１図の第２しや断器２
は限流して転流することを目的としたしや断器で
あるため、小容量の定格で十分である。そのた
め、第３図は第１図の第２しや断器２として、タ
ンク４内に固定電極５と可動電極６を接離可能に
したパツフア型ガスしや断器７を用いたもので、
他の第１しや断器１および抵抗３は第１図と同一
構成であり、この場合前述と同様に短絡電流をし
や断することができる。 FIG. 3 shows a specific embodiment of the invention described above. The second breaker 2 in Fig. 1 mentioned above
Since this is a loop breaker intended for current limiting and commutation, a small capacity rating is sufficient. Therefore, in FIG. 3, a puffer-type gas shield breaker 7 in which a fixed electrode 5 and a movable electrode 6 can be connected and separated in a tank 4 is used as the second shield breaker 2 shown in FIG.
The other first breaker 1 and resistor 3 have the same configuration as in FIG. 1, and in this case can cut off the short-circuit current in the same manner as described above.
さらにこの発明のさらに異る具体的実施例とし
て次の場合がある。前述したように、第１図の第
２しや断器２は、消弧能力が大きく、容量の大き
いものは必要ないので、第２しや断器２として圧
縮空気または大気圧零囲気中に、第３図のパツフ
ア型ガスしや断器７と同じ構造様式である固定電
極５と可動電極６を有するパツフア型しや断器と
してもよい。この場合も前述と同様に効果を奏す
ることができる。 Furthermore, there are the following cases as still further specific embodiments of the present invention. As mentioned above, the second shield breaker 2 shown in FIG. , a puffer type gas shield disconnector having a fixed electrode 5 and a movable electrode 6 having the same structure as the puffer type gas shield disconnector 7 shown in FIG. 3 may be used. In this case as well, the same effects as described above can be achieved.
第１図はこの発明のしや断装置の一実施例を示
す回路図、第２図は同実施例に用いる温度の増加
に対して抵抗値が下に凸で非線形に増加するよう
な抵抗値−温度特性を有する抵抗の特性説明図、
第３図はこの発明の具体的な実施例を示す回路図
である。
１……真空しや断器（第１しや断器）、２……
真空しや断器以外の真空しや断器よりアーク電圧
の高いしや断器、３……抵抗、４……タンク、５
……固定気極、６……可動電極、７……パツフア
型ガスしや断器。
Fig. 1 is a circuit diagram showing an embodiment of the shear cutting device of the present invention, and Fig. 2 is a circuit diagram showing a resistance value that increases non-linearly with an increase in temperature in a downward convex manner as used in the same embodiment. - Characteristic explanatory diagram of a resistor with temperature characteristics,
FIG. 3 is a circuit diagram showing a specific embodiment of the present invention. 1...Vacuum shield disconnector (first shield disconnector), 2...
A breaker with a higher arc voltage than a vacuum breaker other than a vacuum breaker, 3...Resistor, 4...Tank, 5
... fixed gas electrode, 6 ... movable electrode, 7 ... puffer type gas shield and disconnector.
Claims (1)
しや断器以外であつて真空しや断器よりアーク電
圧の高いパツフア型ガスしや断器とを直列に接続
し、このしや断器に並列に、例えば温度の増加に
対して抵抗値が下に凸で非線形に増加するような
抵抗値−温度特性等の抵抗を接続してなるしや断
装置。1 In the main circuit of the power system, connect in series a vacuum shield disconnector and a puffer-type gas shield disconnector, which is other than a vacuum shield disconnector and has a higher arc voltage than the vacuum shield disconnector, and A disconnector is connected in parallel to a disconnector, for example, by connecting a resistor with a resistance value-temperature characteristic such that the resistance value increases non-linearly in a downwardly convex manner as the temperature increases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP778579A JPS55100622A (en) | 1979-01-26 | 1979-01-26 | Breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP778579A JPS55100622A (en) | 1979-01-26 | 1979-01-26 | Breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55100622A JPS55100622A (en) | 1980-07-31 |
| JPS6338809B2 true JPS6338809B2 (en) | 1988-08-02 |
Family
ID=11675315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP778579A Granted JPS55100622A (en) | 1979-01-26 | 1979-01-26 | Breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55100622A (en) |
-
1979
- 1979-01-26 JP JP778579A patent/JPS55100622A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55100622A (en) | 1980-07-31 |
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