JPH01164234A - Harmonic preventing/suppressing device - Google Patents
Harmonic preventing/suppressing deviceInfo
- Publication number
- JPH01164234A JPH01164234A JP62320644A JP32064487A JPH01164234A JP H01164234 A JPH01164234 A JP H01164234A JP 62320644 A JP62320644 A JP 62320644A JP 32064487 A JP32064487 A JP 32064487A JP H01164234 A JPH01164234 A JP H01164234A
- Authority
- JP
- Japan
- Prior art keywords
- reactor
- series
- load
- rectifier
- parallel
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 230000001629 suppression Effects 0.000 claims description 8
- 230000002265 prevention Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000006866 deterioration Effects 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000013016 damping Methods 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 description 5
- 230000002238 attenuated effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002542 deteriorative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000011468 Albizia julibrissin Nutrition 0.000 description 1
- 240000007185 Albizia julibrissin Species 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000116 mitigating effect Effects 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
- Y02E40/40—Arrangements for reducing harmonics
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、整流器負荷の転流動作にともなって発生する
ノツチング電圧によって系統内に生じさせられる転流振
動に起因する高調波を防止ないしは抑制するための高調
波防止抑制装置装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to preventing or suppressing harmonics caused by commutation vibrations caused in a power grid by notching voltage generated with commutation operation of a rectifier load. The present invention relates to a harmonic prevention/suppression device.
サイリスク整流器等の整流器負荷の転流動作にともなっ
て発生する線間電圧の陥没、所謂ノツチング電圧は、例
えば５．５ｋＶ配電系における隣接した力率改善用コン
デンサと線路インダクタンスとが構成するＬ−Ｃ閉回路
に自由共振をひき起こさせ、これに起因した有害な高調
波が系統内に発生する。か＼る現象は転流振動と呼ばれ
る。近年の配電系内の整流器負荷の設置数および容量の
増大により、か＼る転流振動は看逃せない問題となって
いる。The so-called notching voltage, which is a dip in the line voltage that occurs with the commutation of a rectifier load such as a SIRIS rectifier, is caused by the LC formed by the adjacent power factor correction capacitor and line inductance in a 5.5 kV power distribution system, for example. This causes free resonance in the closed circuit, which generates harmful harmonics in the system. This phenomenon is called commutation vibration. With the recent increase in the number and capacity of rectifier loads installed in power distribution systems, commutation vibration has become a problem that cannot be ignored.
従来の高調波対策として、特定の高調波に共振次数を設
定して高調波吸収を図る交流フィルタ、補償制御を行う
アクティブフィルタ、整流器負荷と系統との間に直列に
リアクトルを接続することにより両者の電気的結合を粗
にしてノツチング電圧が系統に流出しないようにするブ
ロッキングリアクタンス等が検討されている。Conventional countermeasures against harmonics include AC filters that absorb harmonics by setting a resonance order for specific harmonics, active filters that perform compensation control, and rectifiers that reduce both by connecting a reactor in series between the load and the grid. Blocking reactance, etc., which roughens the electrical coupling of the notching voltage and prevents the notching voltage from flowing into the grid, is being considered.
しかし、上記の交流フィルタの場合には、系統構成変更
が煩雑な配電系では系統構成変更にともなう高調波抑制
機能の低下や喪失が生じるために汎用性に欠けるという
問題点がある。また、アクティブフィルタの場合には亘
長が短く、５０次程度までにも及ぶ極めて高い共振周波
数への要求に対して２０次程度までしか補償を行えない
ため、適用に限界がある。ブロッキングリアクタンスの
場合には、系統へのノツチング電圧の流失を十分に阻止
しようとすると、整流器負荷の転流特性を悪化させ、甚
だしい場合には転流失敗を招くという問題点がある。本
発明の目的は、従来の技術におけるこれらの問題点を克
服した高調波防止抑制装置を提供することにある。However, in the case of the above-mentioned AC filter, there is a problem that it lacks versatility in power distribution systems where system configuration changes are complicated, since the harmonic suppression function is degraded or lost due to system configuration changes. Furthermore, in the case of an active filter, its application is limited because its length is short and compensation can only be made up to about the 20th order in response to the requirement for extremely high resonance frequencies up to about the 50th order. In the case of blocking reactance, there is a problem in that if an attempt is made to sufficiently prevent the notching voltage from flowing into the grid, the commutation characteristics of the rectifier load will deteriorate, and in extreme cases, commutation failure will occur. It is an object of the present invention to provide a harmonic prevention and suppression device that overcomes these problems in the prior art.
上記目的を達成する本発明による高調波防止抑制装置は
、整流器負荷と系統との間の電気的結合を減ずるために
整流器負荷用変圧器と系統との間に直列に接続したリア
クトルと、そのリアクトルによりもたらされる整流器負
荷の運転特性悪化を防止するために整流器負荷用変圧器
の端子に並列接続したコンデンサと、共振高調波を速や
かに減衰させるために前記リアクトルに直列に挿入接続
した制動抵抗と、その制動抵抗に並列に接続した基本波
バイパス用リアクトルとから構成されている。A harmonic prevention and suppression device according to the present invention that achieves the above object includes a reactor connected in series between a rectifier load transformer and the grid to reduce electrical coupling between the rectifier load and the grid, and a reactor connected in series between the rectifier load transformer and the grid. a capacitor connected in parallel to the terminals of the rectifier load transformer in order to prevent deterioration of the operating characteristics of the rectifier load caused by this, and a braking resistor inserted and connected in series with the reactor to quickly attenuate resonance harmonics; It consists of a fundamental wave bypass reactor connected in parallel to the braking resistor.
上記の如き構成により、整流器負荷用変圧器と系統との
間に直列に接続したリアクトルは、系統と負荷との電気
的結合を減するブロッキングリアクタンスとして作用し
、ノツチング電圧の系統への流失を緩和する働きをし、
ブロッキングリアクタンスを設けたことにより懸念され
る整流器負荷の運転特性悪化の問題は並列コンデンサに
転流時の短絡電流を供給する働きをさせることによって
解消される。発生する共振高調波は制動抵抗により速や
かに減衰させられる。この制動抵抗によってもたらされ
る基本波電流による損失発生の問題は、その制動抵抗に
並列に接続した基本波バイパス用リアクトルによって解
消される。With the above configuration, the reactor connected in series between the rectifier load transformer and the grid acts as a blocking reactance to reduce the electrical coupling between the grid and the load, thereby mitigating the flow of notching voltage into the grid. work to
The problem of deterioration of the operating characteristics of the rectifier load, which is a concern due to the provision of the blocking reactance, can be solved by having the parallel capacitor function to supply short-circuit current during commutation. The generated resonance harmonics are quickly attenuated by the braking resistance. The problem of loss caused by the fundamental current caused by the braking resistor is solved by a fundamental bypass reactor connected in parallel to the braking resistor.
図は本発明による高調波防止抑制装置の１相分を等価回
路図で示す。The figure shows an equivalent circuit diagram of one phase of the harmonic prevention and suppression device according to the present invention.
図において、１はサイリスク整流器の如き整流器負荷、
２は整流器負荷用変圧器である。系統は電圧源３と線路
インダクタンス４とで等価的に示されており、また系統
内の他需要家の力率改善用コンデンサ群は負荷より見て
等価な１つのコンデンサ５として示されている。In the figure, 1 is a rectifier load such as a Sirisk rectifier,
2 is a rectifier load transformer. The system is shown equivalently by a voltage source 3 and line inductance 4, and a group of power factor correction capacitors of other consumers in the system is shown as one equivalent capacitor 5 when viewed from the load.
図に破線枠で囲んで示した本発明による高調波防止抑制
装置は次のように接続構成されている。The harmonic prevention and suppression device according to the present invention, which is shown surrounded by a broken line frame in the figure, is connected and configured as follows.
すなわち、整流器負荷用変圧器の系統側には直列にリア
クトル６が接続され、整流器負荷用変圧器の高圧側端子
には並列にコンデンサ７が接続されている。リアクトル
６には制動抵抗８が直列に挿入接続されており、また制
動抵抗８には並列に基本波バイパス用リアクトル９が接
続されている。That is, a reactor 6 is connected in series to the system side of the rectifier load transformer, and a capacitor 7 is connected in parallel to the high voltage side terminal of the rectifier load transformer. A braking resistor 8 is inserted and connected in series to the reactor 6, and a fundamental wave bypass reactor 9 is connected in parallel to the braking resistor 8.
整流器負荷１は転流動作にともなって転流陥没。Rectifier load 1 collapses due to commutation operation.
即ちノツチング電圧を発汗する。系統と変圧器２との間
に直列に接続されたリアクトル６はブロッキングリアク
タンスとして作用し、これにより負荷と系統との間の電
気的結合が弱まることから、負荷側からのノツチング電
圧の系統への流失が緩和される。リアクトル６のインダ
クタンス値Ｌ０としては、６．６ ｋ Ｖ配電系の場合
には線路の作用インダクタンスが１ ｍ Ｈ／ ｋ ｍ
であり、平均的な系統の幹線亘長が５ｋｍであることか
ら、５ｍＨ程度が採用される。That is, the notching voltage is generated. The reactor 6 connected in series between the grid and the transformer 2 acts as a blocking reactance, which weakens the electrical coupling between the load and the grid, thereby reducing the notching voltage from the load side to the grid. Wash-off is alleviated. As the inductance value L0 of the reactor 6, in the case of a 6.6 kV power distribution system, the working inductance of the line is 1 m H/km
Since the average trunk line length of the system is 5 km, approximately 5 mH is adopted.
他方、このインダクタンスＬ０の存在により負荷の端子
電圧が低下するなどの運転特性悪化が懸念されるため、
転流時の短絡電流供給用に整流器負荷用変圧器の高圧側
端子には並列に容量Ｃ０のコンデンサ７が接続されてい
る。このコンデンサ７は力率改善効果を持つため、力率
改善コンデンサとして兼用させることができる。On the other hand, there is a concern that the presence of this inductance L0 will cause deterioration in operating characteristics such as a drop in the terminal voltage of the load.
A capacitor 7 having a capacitance C0 is connected in parallel to the high voltage side terminal of the rectifier load transformer for supplying short circuit current during commutation. Since this capacitor 7 has a power factor improving effect, it can also be used as a power factor improving capacitor.
インダクタンスＬ０により、系統内の他需要家の力率改
善用コンデンサ群は負荷より見て等価な１個の静電容量
Ｃ０のコンデンサ５として振る舞うため、他需要家の力
率改善用コンデンサ間の共振は抑制され、発生する共振
高調波は系統構成の差異に殆ど影響されず、Ｃ−Ｌｏ−
Ｃｏの閉回路に封じ込められる。その共振周波数ｆ、は
、−般に、
Ｃ，＞＞Ｃ０−・−−−−−・−ｍ−−・−・・−・−
・・ （１１が成立するので、
ｆ、＃ 、−−−−・−−−一−
・・・−（２）２π−ｖ’ Ｌ ｏ Ｃ。Due to the inductance L0, the power factor improvement capacitors of other consumers in the system behave as one equivalent capacitor 5 with capacitance C0 when viewed from the load, so resonance between the power factor improvement capacitors of other consumers occurs. is suppressed, and the generated resonance harmonics are almost unaffected by differences in system configuration, and C
Contained in a Co closed circuit. The resonant frequency f, is generally C, >> C0-・-------m--・--・--
... (11 holds, so f, #, -----・----1-
...-(2) 2π-v' L o C.
なる式にて与えられる。It is given by the formula:
更に、リアクトル６に直列に挿入接続された制動抵抗８
は、共振高調波を速やかに減衰させるのに役立つ。しか
し、減衰速度を十分に高めようとすると、この制動抵抗
８における基本波電流による損失発生が無視できなくな
るという弊害がもたらされる。制動抵抗８に並列接続さ
れた基本波バイパス用リアクトル９はその弊害を解消す
るのに役立つ。制動抵抗８の抵抗値をＲｏ、基本波バイ
パス用リアクトル９のインダクタンス値をＬ３とすると
、このＲ−Ｌ並列回路８．９のインピーダンスは、任意
の角周波数ωについて、
と表すことができる。基本波バイパス条件より、商用角
周波数をＣ８とするとき、Ｌｓ＋Ｒｏは次式を満足する
必要がある。Furthermore, a braking resistor 8 is inserted and connected in series to the reactor 6.
helps quickly dampen resonant harmonics. However, if an attempt is made to sufficiently increase the attenuation speed, a problem arises in that the loss caused by the fundamental wave current in the braking resistor 8 cannot be ignored. A fundamental wave bypass reactor 9 connected in parallel to the braking resistor 8 helps to eliminate this problem. Assuming that the resistance value of the braking resistor 8 is Ro and the inductance value of the fundamental wave bypass reactor 9 is L3, the impedance of this R-L parallel circuit 8.9 can be expressed as follows for any angular frequency ω. According to the fundamental wave bypass condition, when the commercial angular frequency is C8, Ls+Ro needs to satisfy the following equation.
ωＮ Ｌ Ｓ 〈〈ＲＯ−−−−−−・−・−〜〜−−
ｆ４）次に、減衰を速やかにすべき共振高調波に対する
Ｒ−Ｌ並列回路のインピーダンスの抵抗分Ｒ，は次式で
与えられる。ωN L S 〈〈RO−−−−−−・−・−〜〜−−
f4) Next, the resistance component R of the impedance of the R-L parallel circuit with respect to the resonance harmonic that should be quickly attenuated is given by the following equation.
但し、
ω、＝２πｆ 、 、−−−−−−−−−−−
−−−−−−一・・・−・−（６）ここで、
Ｌ ０＞＞ ｌ、 、 −−−−−−−−
・・−・−・・−・−−−−−（７）とすれば、フィル
タの共振度Ｑは共振周波数ｆ。However, ω,=2πf, ,−−−−−−−−−−−
−−−−−−−−−−−(6) Here, L 0 >> l, , −−−−−−−−
··············································································································································(7)
に対して、
となるので、この共振度Ｑが適切な値（１０〜１００）
になるように、抵抗分Ｒ，を設定すればよい。For this reason, this resonance degree Q is an appropriate value (10 to 100)
What is necessary is to set the resistance R, so that .
以上のように、本発明によれば、系統と整流器負荷との
間の直列リアクトルと、この直列リアクトルの負荷側の
並列コンデンサとによって整流器負荷の運転特性を悪化
させることなく系統へのノツチング電圧の流失を緩和し
、その直列リアクトルに直列に挿入した基本波バイパス
用リアクトル付き制動抵抗により基本波電流による損失
発生を防ぎながら共振高周波を速やかに減衰させること
ができる。さらに、転流時のように速い現象に対しては
、基本波バイパス用リアクトルを通過する電流は制動抵
抗のそれに比べれば十分に小さく、等偏部にＲ８−Ｌ０
直列になり、単なるＬ０単独回路よりも通過電流の立ち
上がりが遅れるので、ノツチング電圧の系統流失防止機
能向上が負荷運転特性悪化を招くことなく可能となる。As described above, according to the present invention, the series reactor between the grid and the rectifier load and the parallel capacitor on the load side of the series reactor allow the notching voltage to be applied to the grid without deteriorating the operating characteristics of the rectifier load. The resonant high frequency can be quickly attenuated while reducing the flow loss and preventing loss caused by the fundamental wave current by using a braking resistor with a fundamental wave bypass reactor inserted in series with the series reactor. Furthermore, for fast phenomena such as during commutation, the current passing through the fundamental wave bypass reactor is sufficiently small compared to that of the braking resistor, and the R8-L0
Since they are connected in series and the rise of the passing current is delayed compared to a simple L0 single circuit, it is possible to improve the function of preventing the notching voltage from flowing out of the system without deteriorating the load operation characteristics.
図は本発明による高調波防止抑制装置の実施例を１相分
について等偏部に示す回路図である。
１−整流器負荷、２−整流器負荷用変圧器、３・・・系
統の等価電圧源、４−・・等価線路インダクタンス、５
−系統内地需要家の力率改善用コンデンサ群の等価コン
デンサ、６・−・直列リアクトル、７−・並列コンデン
サ、８−制動抵抗、９−基本波バイパス用リアクトル。The figure is a circuit diagram showing an embodiment of the harmonic prevention/suppression device according to the present invention in equally polarized parts for one phase. 1- Rectifier load, 2- Rectifier load transformer, 3... Equivalent voltage source of the system, 4-... Equivalent line inductance, 5
- Equivalent capacitor of a group of power factor improvement capacitors for local consumers in the system, 6 - Series reactor, 7 - Parallel capacitor, 8 - Braking resistor, 9 - Fundamental wave bypass reactor.
Claims (1)
流器負荷用変圧器と系統との間に直列に接続したリアク
トルと、そのリアクトルによりもたらされる整流器負荷
の運転特性悪化を防止するために整流器負荷用変圧器の
端子に並列接続したコンデンサと、共振高調波を速やか
に減衰させるために前記リアクトルに直列に挿入接続し
た制動抵抗と、その制動抵抗に並列に接続した基本波バ
イパス用リアクトルとを備えていることを特徴とする高
調波防止抑制装置。A reactor is connected in series between the rectifier load transformer and the grid in order to reduce the electrical coupling between the rectifier load and the grid, and a rectifier is connected in series to prevent the deterioration of the operating characteristics of the rectifier load caused by the reactor. A capacitor connected in parallel to the terminals of the load transformer, a braking resistor inserted and connected in series to the reactor in order to quickly attenuate resonance harmonics, and a fundamental wave bypass reactor connected in parallel to the braking resistor. A harmonic prevention and suppression device characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62320644A JPH0685623B2 (en) | 1987-12-18 | 1987-12-18 | Harmonic wave prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62320644A JPH0685623B2 (en) | 1987-12-18 | 1987-12-18 | Harmonic wave prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01164234A true JPH01164234A (en) | 1989-06-28 |
| JPH0685623B2 JPH0685623B2 (en) | 1994-10-26 |
Family
ID=18123711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62320644A Expired - Lifetime JPH0685623B2 (en) | 1987-12-18 | 1987-12-18 | Harmonic wave prevention device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0685623B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008537467A (en) * | 2005-04-20 | 2008-09-11 | エヌエックスピー ビー ヴィ | Parallel arranged linear amplifier and DC-DC converter |
-
1987
- 1987-12-18 JP JP62320644A patent/JPH0685623B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008537467A (en) * | 2005-04-20 | 2008-09-11 | エヌエックスピー ビー ヴィ | Parallel arranged linear amplifier and DC-DC converter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0685623B2 (en) | 1994-10-26 |
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