JPS6331429A - Protector of reactive power compensator - Google Patents
Protector of reactive power compensatorInfo
- Publication number
- JPS6331429A JPS6331429A JP61170908A JP17090886A JPS6331429A JP S6331429 A JPS6331429 A JP S6331429A JP 61170908 A JP61170908 A JP 61170908A JP 17090886 A JP17090886 A JP 17090886A JP S6331429 A JPS6331429 A JP S6331429A
- Authority
- JP
- Japan
- Prior art keywords
- reactive power
- power compensator
- arrester
- protective
- arresters
- 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
- 230000001012 protector Effects 0.000 title 1
- 230000001681 protective effect Effects 0.000 claims description 19
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は、保護用アレスタの保護効果と経済性との改善
を図った無効電力補償装置の保護装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a protection device for a reactive power compensator that improves the protective effect and economical efficiency of a protective arrester.
（従来の技術）
電気炉などのように変動の大きい負荷を持った系統にお
いては、その無効電力の変化によって電源電圧の変動を
引き起すことがある。この対策としてこのような系統に
は、回路電圧を一定にするように無効電力を高速で補償
する無効電力補償装置が用いられている。(Prior Art) In a system with a load that fluctuates widely, such as an electric furnace, changes in the reactive power may cause fluctuations in the power supply voltage. As a countermeasure for this, such systems use a reactive power compensator that compensates for reactive power at high speed so as to keep the circuit voltage constant.
従来の無効電力補償装置は、補償リアクトルと逆並列接
続のサイリスタスイッチとの直列回路をΔ結線し、この
６回路を系統の線間に接続して構成するのが普通である
。またこの無効電力補償装置の特にサイリスタスイッチ
の保護としては酸化亜鉛素子を使用した線間用アレスタ
を系統の負荷側の線間に接続して保護協調を図っており
、さらに線間用アレスタだけで十分な保護効果が期待さ
れない場合は、無効電力補償装置の系統接続点と大地と
の間に対地アレスタを設けることも行なわれていた。Conventional reactive power compensators are generally configured by connecting a series circuit of a compensation reactor and a thyristor switch connected in antiparallel in a delta connection, and connecting these six circuits between the lines of a system. In addition, to protect the thyristor switch in this reactive power compensator, a line-to-line arrester using a zinc oxide element is connected between the lines on the load side of the system for protection coordination. If a sufficient protective effect is not expected, a ground arrester has also been installed between the system connection point of the reactive power compensator and the ground.
（発明が解決しようとする問題点）
しかし、従来の線間用アレスタでは、アレスタに対して
低保護レベルの設定、系統から入るシャープな過電圧波
形に対する短時間過電圧特性の特殊性およびアレスタの
配置構造などを考慮すると、アレスタの素子並列数の増
加や、この増加による構造の大形化はまぬがれない。ま
たアレスタをサイリスタスイッチのセットの中に組み込
むこともできず、どうしても系統の線間に接続し、しか
も碍管に組立だアレスタ並列構成で配置しなければなら
ず、その据付面積を広く必要とするなど経済性も不利で
あった。(Problems to be Solved by the Invention) However, with conventional line-to-line arresters, there is a need to set a low protection level for the arrester, a unique short-time overvoltage characteristic against sharp overvoltage waveforms coming from the power grid, and the arrangement structure of the arrester. Considering these factors, it is inevitable that the number of parallel arrester elements will increase and that the structure will become larger due to this increase. Furthermore, it is not possible to incorporate the arrester into a thyristor switch set, and the arrester must be connected between the lines of the system, and the arrester must be assembled in an insulator tube in a parallel configuration, which requires a large installation area. Economic efficiency was also disadvantageous.
本発明の目的は、低保護レベル化を可能にし。An object of the present invention is to enable lower protection levels.
かつ全体の構造をコンパクトになし得る無効電力補償装
置の保護装置を提供することにある。Another object of the present invention is to provide a protection device for a reactive power compensator that can have a compact overall structure.
（問題点を解決するための手段および作用）本発明の無
効電力補償装置の保護装置は、補償用リアクトルと逆並
列接続のサイリスタスイッチとの直列回路をΔ結線し、
このΔ結線回路を三相系統の各相線間に接続した無効電
力補償装置において、前記サイリスクスイッチのアノー
ド・カソード間に並列に保護用アレスタを接続したこと
を特徴とするものである。(Means and effects for solving the problem) The protective device for the reactive power compensator of the present invention connects a series circuit of a compensating reactor and a thyristor switch connected in anti-parallel with a Δ connection,
A reactive power compensator in which this delta connection circuit is connected between each phase line of a three-phase system is characterized in that a protective arrester is connected in parallel between the anode and cathode of the silisk switch.
本発明においては、保護用アレスタをサイリスタスイッ
チのアノード・カソード間に並列に接続したことにより
、従来の線間用アレスタのように特殊な短時間過電圧特
性を考慮する必要がなく、その並列素子数も特別に増加
することなく、低保護レベルが期待され、かつ全体の小
形化を図ることができる。In the present invention, by connecting the protective arrester in parallel between the anode and cathode of the thyristor switch, there is no need to consider special short-time overvoltage characteristics unlike conventional line-to-line arresters, and the number of parallel elements A low protection level can be expected without any particular increase in the amount of protection, and the overall size can be reduced.
（実施例）
以下本発明を図面に示す一実施例について説明する０図
面は便宜上から電源トランスＴＲまでを単結線で示し、
そのトランスの２次側に接続される本発明による無効電
力補償装置１を三相結線で示している。すなわち、その
無効電力補償装置１は、トランスＴＲの二次側の三相系
統の線間Ｒ，Ｓ、Ｔに補償リアクトル２ａ、 ２ｂ、
２ｃと逆並列接続のサイリスタスイッチ３ａ、 ３ｂ、
３ｃとの直列回路をΔ形結線したΔ形回路を接続して
構成される。(Embodiment) An embodiment of the present invention shown in the drawings will be described below.For convenience, the drawings show a single connection up to the power transformer TR.
A reactive power compensator 1 according to the present invention connected to the secondary side of the transformer is shown in a three-phase connection. That is, the reactive power compensator 1 includes compensation reactors 2a, 2b,
Thyristor switches 3a, 3b, connected in antiparallel to 2c.
It is constructed by connecting a Δ type circuit which is a Δ type connected series circuit with 3c.
しかして本発明においては、その無効電力補償装置１の
保護用アレスタとして、酸化亜鉛素子を使用した保護用
アレスタ４ａ、 ４ｂ、 ４ｃをそれぞれのサイリスク
スイッチ３ａ、 ３ｂｔ ３ｃのアノード・カソード間
に並列に接続して構成したものである。さらにこの保護
用アレスタ４ａ、 ４ｂ、 ４ｃのみで十分な保護効果
が得られない場合は、Δ形回路の各接続点と大地との間
にそれぞれ対地用アレスタ５ａ、 ５ｂ。Therefore, in the present invention, as protective arresters for the reactive power compensator 1, protective arresters 4a, 4b, and 4c using zinc oxide elements are connected in parallel between the anodes and cathodes of the respective silice switches 3a, 3bt, and 3c. It is configured by connecting to. Furthermore, if a sufficient protective effect cannot be obtained with these protective arresters 4a, 4b, 4c alone, ground arresters 5a, 5b are installed between each connection point of the Δ type circuit and the ground, respectively.
５ｃを接続して配置される。5c are connected and arranged.
次にこのように構成された無効電力補償装置１において
は、保護用アレスタ４ａ、 ４ｂ、 ４ｃをそれぞれサ
イリスタスイッチ３ａ、 ３ｂ、 ３ｃに並列に接続し
て配置したことにより、系統から侵入する過電圧も補償
用リアクトル２ａ、 ２ｂ、 ２ｃを通るときに平滑さ
れるので、各々の保護用アレスタ４ａ、 ４ｂ、 ４ｃ
の保護効果が向上する。Next, in the reactive power compensator 1 configured as described above, the protective arresters 4a, 4b, and 4c are connected and arranged in parallel to the thyristor switches 3a, 3b, and 3c, respectively, thereby preventing overvoltage from entering from the grid. Since it is smoothed when passing through the compensation reactors 2a, 2b, 2c, each of the protective arresters 4a, 4b, 4c
The protective effect of
また従来の線間用アレスタでは、侵入する過電圧に対し
て特殊な短時間過電圧特性や低保護レベルを期待するた
めに、素子の並列数を増やす必要があったが、本発明に
よる保護用アレスタ４ａ、４ｂ、’４ｃの配置では、特
別に並列数を増やす必要もなく、低保護レベルで高性能
化が期待できる。In addition, in conventional line-to-line arresters, it was necessary to increase the number of parallel elements in order to expect special short-time overvoltage characteristics and low protection levels against invading overvoltages, but the protective arrester 4a according to the present invention , 4b, and '4c, there is no need to particularly increase the number of parallel connections, and high performance can be expected with a low protection level.
さらに本発明による保護用アレスタ４ａ、 ４ｂ、 ４
ｃは、サイリスタスイッチ３ａ、 ３ｂ、 ３ｃのセッ
ト内において、そのアノードとカソードとの間に接続配
置するものであるから、従来のように碍管構成でなくと
もよく、絶縁筒内に小形にまとめて配置すればよく、そ
のサイリスタスイッチセットを含めて全体のコンパクト
化を図ることができる。Furthermore, protective arresters 4a, 4b, 4 according to the invention
Since c is connected between the anode and cathode of the thyristor switches 3a, 3b, and 3c in the set, it is not necessary to have an insulated tube configuration as in the conventional case, and it can be assembled into a small size in an insulating cylinder. The entire thyristor switch set including the thyristor switch set can be made more compact.
以上のように本発明によれば、無効電力補償装置の保護
用アレスタとして線間用アレスタを排し、その代りにサ
イリスクスイッチのアノード・カソード間に保護用アレ
スタを接続したことにより、線間用アレスタのように特
殊な短時間過電圧特性を考慮する必要もなく、アレスタ
自体の小形化から全体構造の小形化に役立ち、さらにア
レスタの並列数を増やす必要もなく、低保護レベルの高
性能化を図ることができる。As described above, according to the present invention, the inter-line arrester is eliminated as the protective arrester of the reactive power compensator, and the protective arrester is connected between the anode and cathode of the thyrisk switch instead. Unlike commercial arresters, there is no need to consider special short-time overvoltage characteristics, which helps to reduce the size of the arrester itself and the overall structure.Furthermore, there is no need to increase the number of parallel arresters, and it improves the performance of low protection levels. can be achieved.
図面は本発明による無効電力補償装置の保護装置の一実
施例を示す結線図である。
ＴＲ・・・電源トランス
ト・・無効電力補償装置The drawing is a wiring diagram showing an embodiment of a protection device for a reactive power compensator according to the present invention. TR...Power transformer...Variable power compensator
Claims (2)
ッチとの直列回路をΔ結線し、このΔ結線回路を三相系
統の各相線間に接続した無効電力補償装置において、前
記サイリスタスイッチのアノード・カソード間に並列に
保護用アレスタを接続したことを特徴とする無効電力補
償装置の保護装置。(1) In a reactive power compensator in which a series circuit of a compensation reactor and a thyristor switch connected in antiparallel is connected in a delta connection, and this delta connection circuit is connected between each phase line of a three-phase system, the anode of the thyristor switch A protective device for a reactive power compensator, characterized in that a protective arrester is connected in parallel between cathodes.
との間に対地用アレスタを接続したことを特徴とする特
許請求の範囲第１項記載の無効電力補償装置の保護装置
。(2) Protection of the reactive power compensator according to claim 1, characterized in that a ground arrester is connected between the connection point of the delta connection circuit with each phase line of the three-phase system and the ground. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61170908A JPS6331429A (en) | 1986-07-22 | 1986-07-22 | Protector of reactive power compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61170908A JPS6331429A (en) | 1986-07-22 | 1986-07-22 | Protector of reactive power compensator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6331429A true JPS6331429A (en) | 1988-02-10 |
Family
ID=15913567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61170908A Pending JPS6331429A (en) | 1986-07-22 | 1986-07-22 | Protector of reactive power compensator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6331429A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5666173A (en) * | 1979-10-30 | 1981-06-04 | Mitsubishi Electric Corp | Rectifier |
| JPS61125629A (en) * | 1984-11-15 | 1986-06-13 | ウエスチングハウス・エレクトリック・コ−ポレ−ション | Reactive power generation circuit |
-
1986
- 1986-07-22 JP JP61170908A patent/JPS6331429A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5666173A (en) * | 1979-10-30 | 1981-06-04 | Mitsubishi Electric Corp | Rectifier |
| JPS61125629A (en) * | 1984-11-15 | 1986-06-13 | ウエスチングハウス・エレクトリック・コ−ポレ−ション | Reactive power generation circuit |
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