JPS61150621A - Harmonic supressor - Google Patents
Harmonic supressorInfo
- Publication number
- JPS61150621A JPS61150621A JP59272486A JP27248684A JPS61150621A JP S61150621 A JPS61150621 A JP S61150621A JP 59272486 A JP59272486 A JP 59272486A JP 27248684 A JP27248684 A JP 27248684A JP S61150621 A JPS61150621 A JP S61150621A
- Authority
- JP
- Japan
- Prior art keywords
- harmonic
- current
- compensation
- order
- current 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 23
- 230000001629 suppression Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 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
(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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、能動形の高調波抑制装置に関する。[Detailed description of the invention] Industrial applications The present invention relates to an active harmonic suppression device.
従来の技術
整流器などの非線形負荷を交流電源に接続する場合、交
流電流は高調波を含んだひずみ波電流になり、この高調
波電流が電源や系統のインピーダンスと作用して交流電
圧波形をひずませ、同じ系統ＶＣ接続され几他の電気機
器に悪影響を及ぼすことがある。Conventional technology When a nonlinear load such as a rectifier is connected to an AC power source, the AC current becomes a distorted wave current containing harmonics, and this harmonic current interacts with the impedance of the power supply and grid to distort the AC voltage waveform. Otherwise, it may have an adverse effect on other electrical equipment connected to the same VC system.
そこで、第２図に示す工うに、交流電源ｌに負荷２が接
続されるのに、並列に高調波抑制装置３を接続し、負荷
２に流れる高調波電流に１つて′電源インピーダンス４
の存在による電源側電流、電圧がひずむのを抑制する高
調波電流を該高禰波抑制装置３が供給する。この工つな
高調波抑制装置は、負荷電流に含まれる高調ｅ電流を検
出し、この検出電流と逆相の補償電流になるよ５出力電
流を制御している。このための高調波電流検出回路は、
第３図に一点鎖線ブロック５で示すＬうに、負荷電流検
出用変流器６からの検出電流を高調波次数に夫々対応さ
せたバンドパスフィルタ７２〜７ｎを遡して夫々の次数
の高調波電流Ｉ２〜Ｉｎ信号を検出し、これら検出回路
を加算器８で加算して補ＩＪｊ Ｌようとする高調波電
流検出回路Ｉｆを得ている。Therefore, in the construction shown in Fig. 2, a harmonic suppressor 3 is connected in parallel to the load 2 connected to the AC power supply l, and one harmonic current flowing through the load 2 is
The high harmonic wave suppression device 3 supplies a harmonic current that suppresses distortion of the power supply side current and voltage due to the presence of the high harmonic wave suppression device 3. This sophisticated harmonic suppression device detects the harmonic e current included in the load current and controls the five output currents so that the compensation current is in the opposite phase to this detected current. The harmonic current detection circuit for this purpose is
As indicated by the dashed-dotted line block 5 in FIG. A harmonic current detection circuit If is obtained which detects the current I2 to In signals and adds these detection circuits in an adder 8 to obtain a complementary signal IJjL.
Ｉｆ＝Σｉｌ ＠＊＊＊ｅ−ｏｓｅｓ （１）発明が
解決しようとする問題点
に来の高調波電流検出回路５の検出信号に応じ次高調波
補償電流を得るものでは、延圧歪みを補償するという観
点からは問題がある。即ち、電源側インピーダンス４が
リアクタンス成分であるため、同じ高調波電流レベルに
あっても′電圧歪みは高調波次数によって異なり、次数
の高い高調波電流はど電圧歪みの補償効果が少なくなる
。換言すれば、高次高調波電流を十分に補償する電流供
給では低次高調波電流が過補償になり、装置容量上は蝿
駄な補償を猟が多くなり効率良い補償方式とはならない
ものであった。If=Σil @***e-oses (1) The problem to be solved by the invention is that in the device that obtains the next harmonic compensation current according to the detection signal of the harmonic current detection circuit 5, rolling distortion is compensated. There is a problem from this point of view. That is, since the power supply side impedance 4 is a reactance component, the voltage distortion varies depending on the harmonic order even if the harmonic current level is the same, and the higher the harmonic current, the less the effect of compensating for the voltage distortion. In other words, when supplying current that sufficiently compensates for high-order harmonic currents, the low-order harmonic currents will be overcompensated, and there will be a lot of unnecessary compensation given the device capacity, which will not result in an efficient compensation method. there were.
一力、電源に含まれる各次数の′延圧歪みを検出して補
償電流を求める補償力式がある。この補償方式の場会は
、上述の問題は解消されるが、一般に検出される電圧歪
量は電流歪量に較べて小さく、電圧歪み検出回路に十分
な精度のものを得るのが雌しくなり、結果的に補償ｉｔ
電流度も愚くなってしまう問題が残る。There is a compensation force formula that detects the rolling strain of each order included in the power supply and calculates the compensation current. Although this compensation method solves the above problem, the amount of voltage distortion that is generally detected is smaller than the amount of current distortion, making it difficult to obtain sufficient accuracy for the voltage distortion detection circuit. , resulting in compensation it
There remains the problem that the current level also becomes unstable.
問題点を解決するための手段と作用
本発明は、上述の問題点に鑑み、負荷電流の検出回路か
ら各次数の高調波電流を夫々検出する複数ノバンドバス
フィルタと、これら各バンドパスフィルタの出力信号に
電源側インビーダンスト高調波次数によって設定する各
次数毎の係数を夫々乗算する複数の係数器と、これら各
係数器の出力信号を加算して高調波電流検出回路を得る
加算器とからなる高調波電流検出回路を備え、各次数毎
の高調波電流に対する電圧歪みへの軽重に応じて補償電
流を検出するものである。Means and Effects for Solving the Problems In view of the above-mentioned problems, the present invention provides a plurality of bandpass filters for detecting harmonic currents of each order from a load current detection circuit, and a plurality of bandpass filters for each of these bandpass filters. A plurality of coefficient units that multiply the output signal by a coefficient for each order set by the impedance harmonic order on the power supply side, and an adder that adds the output signals of these coefficient units to obtain a harmonic current detection circuit. The system is equipped with a harmonic current detection circuit consisting of a harmonic current detection circuit, and detects a compensation current according to the weight of voltage distortion with respect to the harmonic current of each order.
実抱例 第１図は本発明の一実施例を示す回路図である。actual case FIG. 1 is a circuit diagram showing an embodiment of the present invention.
同図が第３図と異なる部分は、バンドパスフィルタ７２
〜７ｎの各出力信号Ｉ２〜ＩｎＫ友々係数に２〜Ｋｎを
乗算する係数器９２〜９ｎを設け、これら係数器９２〜
９ｎの出力信号Ｉ２′〜Ｉｒｊｆ加算器８の加算人力と
し九点にある。ここで、係数器９２〜９ｎは検出回路Ｉ
２〜Ｉｎのレベルが高いときにはポテンショメータや抵
抗分圧回路等の受動素子構成にされるし、レベルが低い
ときには利得係数に２〜Ｋｎを持つ増幅器構成にされる
し、バンドパスフィルタ７２〜７ｎも含め友増幅器購成
にされる。The difference between this figure and FIG. 3 is that the bandpass filter 72
Coefficient multipliers 92 to 9n are provided to multiply each of the output signals I2 to InK by 2 to Kn, and these coefficient multipliers 92 to
9n output signals I2' to Irjf adder 8's addition power is at nine points. Here, the coefficient units 92 to 9n are the detection circuits I
When the level of 2~In is high, a passive element configuration such as a potentiometer or a resistive voltage divider circuit is used, and when the level is low, an amplifier configuration with a gain coefficient of 2~Kn is used, and bandpass filters 72~7n are also used. Including the friend amplifier purchase.
ま友、係数器９２〜９ｎの係数に２〜Ｋｎは、′１ｔ＃
インピーダンス４の大きさくリアクタンス分）と高調波
次数によって設定され、例えばに２１２ ＝ Ｋ５Ｙ５
＝ ａｍａｓｓ ＝ ＫｎＩｎ ａｍ＊＊ ｆ２Ｊと
なるようにｅ定され、低次高調波はど小さい値にされる
。Mayu, the coefficients 2 to Kn of the coefficient multipliers 92 to 9n are '1t#
It is set by the size of impedance 4 (reactance) and harmonic order, for example, 212 = K5Y5
= amass = KnIn am** f2J, and the lower harmonics are set to the smallest value.
こうした構成の高調波電流検出回路５Ａを役けることに
より、変流器６からの負荷電流検出回路に対して、バン
ドパスフィルタ７２〜７ｎで検出される各次数の高調波
電流検出量２〜Ｉｎには係数に２〜Ｋｎが乗算され、′
Ｍ、源インビーダ／ス４による高調波電流対電圧歪みへ
の作用度合に適曾した検出電流信号を得ることができる
。こｊ、は、−同じ高調波発生量に対して高調波抑制装
置の容量を小さくして効率良い運転を可能にする。By using the harmonic current detection circuit 5A having such a configuration, the harmonic current detection amount 2 to In of each order detected by the band pass filters 72 to 7n can be detected by the load current detection circuit from the current transformer 6. The coefficient is multiplied by 2~Kn, and '
It is possible to obtain a detected current signal suitable for the degree of influence of the source invader/s 4 on harmonic current vs. voltage distortion. - This enables efficient operation by reducing the capacity of the harmonic suppression device for the same amount of harmonics generated.
例えば、発生した高調波電流が５次高調波で１０ＯＡ
、 ７次高調波で１０ＯＡの合計２０ＯＡとし、高調波
抑制装置が補償できる容量が１２ＯＡとするとき、従来
では５久高調波に６ＯＡ、７久高調波に６ＯＡとする均
等補償になるが、本実施例では係数に５＝１ 、に７＝
１．４とすると５次高調波１ｃ５０Ａ、７次高調波に７
ＯＡとする配分補償になる。このとき、電圧歪み補償度
合から見ると、電源インピーダンス４が５次高調波に対
して１０．７次高調波に対して１．４０とすると、従来
方式では５欠高調波に対する補償電圧Ｖ５＝６０Ｖ、７
次冒調波に対する補償電圧Ｖ７＝８４Ｖとなるのに対し
て、本実施例では補償電圧Ｖ５＝５０Ｖ、Ｖ７＝９８Ｖ
となり、電圧歪み補償度合としては
となって同じ装置容量でも従来のものＬすも大きい電圧
歪み補償を得ることができる。For example, the generated harmonic current is 5th harmonic and is 10OA
, When the 7th harmonic is 10OA, totaling 20OA, and the capacity that can be compensated by the harmonic suppression device is 12OA, conventionally the 5th harmonic is compensated equally with 6OA and the 7th harmonic is equalized with 6OA, but in this case. In the example, the coefficient is 5=1 and the coefficient is 7=
If it is 1.4, the 5th harmonic is 1c50A, and the 7th harmonic is 7
This will be distributed compensation as OA. At this time, in terms of the degree of voltage distortion compensation, if the power supply impedance 4 is 1.40 for the 5th harmonic and 10.7th harmonic, then in the conventional system, the compensation voltage V5 for the 5th harmonic is 60 V. ,7
The compensation voltage for the next harmonic is V7=84V, whereas in this example, the compensation voltage V5=50V and V7=98V.
As a result, the degree of voltage distortion compensation is much greater than that of the conventional device even with the same device capacity.
また、本実施例では電圧歪みを補償するのに、電圧歪み
検出によることなく検出量を大きくできる電流検出にし
て検出精度を上げ、結果的に補償精度を高くすることが
できる。例えば、電源容量と負荷容量が等しいとし、電
源インピーダンスが１０〜の°リアクタンス分を持つと
すると、電圧歪み検出量は電流歪み検出量の１７１Ｏで
しかない。Further, in this embodiment, in order to compensate for voltage distortion, current detection that can increase the amount of detection is used without relying on voltage distortion detection to improve detection accuracy, and as a result, it is possible to increase compensation accuracy. For example, if the power supply capacity and load capacity are equal and the power supply impedance has a reactance of 10° or more, the detected voltage distortion amount is only 171° of the detected current distortion amount.
発明の効果
以上のとおり、本発明によれば、電圧歪み補償に高調波
電流検出量によって補償電流を得、しかも高調波次数に
応じた補償電流を検出するため、装置容量に較べて効率
良い電圧歪み補償になるし。Effects of the Invention As described above, according to the present invention, a compensation current is obtained for voltage distortion compensation by the detected amount of harmonic current, and the compensation current is detected according to the harmonic order, so that the voltage is more efficient compared to the device capacity. It will be distortion compensation.
補償精度も向上できる効果がある。This has the effect of improving compensation accuracy.
第１図は本発明の一実施例を示す回路図、第２図は高調
波抑制装置の概念的説明のための図、第３図は従来の高
調波抑制装置回路図である。
１・・・電源、２・・・負荷、３・・・高調波抑制装置
、４・・・電源インピーダンス、５，５Ａ・・・高調波
電流検出回路、６・・・変流器、７２＋７３＊７ｎ・・
・バンドパスフィルタ、８・・・加算器、９２，９５．
９ｎ・・・係数器。
第１図FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a diagram for conceptually explaining a harmonic suppression device, and FIG. 3 is a circuit diagram of a conventional harmonic suppression device. 1... Power supply, 2... Load, 3... Harmonic suppressor, 4... Power source impedance, 5,5A... Harmonic current detection circuit, 6... Current transformer, 72+73* 7n...
-Band pass filter, 8... Adder, 92, 95.
9n...Coefficient unit. Figure 1
Claims (1)
信号に応じて補償電流を供給する高調波抑制装置におい
て、負荷電流の検出信号から各次数の高調波電流を夫々
検出する複数のバンドパスフィルタと、これら各バンド
パスフィルタの出力信号に電源側インピーダンスと高調
波次数によって設定する各次数毎の係数を夫々乗算する
複数の係数器と、これら各係数器の出力信号を加算して
前記高調波電流検出信号を得る加算器とからなる高調波
電流検出回路を備えたことを特徴とする高調波抑制装置
。In a harmonic suppression device that is connected in parallel to a load and supplies a compensation current according to a harmonic current detection signal included in the load current, a plurality of bandpass filters each detect harmonic current of each order from the load current detection signal. , a plurality of coefficient units that multiply the output signals of each of these band-pass filters by coefficients for each order set based on the power supply side impedance and the harmonic order, and a plurality of coefficient units that multiply the output signals of each of these band-pass filters by coefficients for each order, respectively, and add the output signals of these coefficient units to calculate the harmonics. A harmonic suppression device comprising a harmonic current detection circuit comprising an adder for obtaining a current detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59272486A JPS61150621A (en) | 1984-12-24 | 1984-12-24 | Harmonic supressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59272486A JPS61150621A (en) | 1984-12-24 | 1984-12-24 | Harmonic supressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61150621A true JPS61150621A (en) | 1986-07-09 |
| JPH0530121B2 JPH0530121B2 (en) | 1993-05-07 |
Family
ID=17514590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59272486A Granted JPS61150621A (en) | 1984-12-24 | 1984-12-24 | Harmonic supressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61150621A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63217928A (en) * | 1987-03-04 | 1988-09-12 | 関西電力株式会社 | Active filter with injection circuit |
| JPH01136529A (en) * | 1987-11-19 | 1989-05-29 | Meidensha Corp | Active filter |
-
1984
- 1984-12-24 JP JP59272486A patent/JPS61150621A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63217928A (en) * | 1987-03-04 | 1988-09-12 | 関西電力株式会社 | Active filter with injection circuit |
| JPH01136529A (en) * | 1987-11-19 | 1989-05-29 | Meidensha Corp | Active filter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0530121B2 (en) | 1993-05-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |