JP2877388B2 - Harmonic suppression device with voltage compensation function - Google Patents
Harmonic suppression device with voltage compensation functionInfo
- Publication number
- JP2877388B2 JP2877388B2 JP1286491A JP28649189A JP2877388B2 JP 2877388 B2 JP2877388 B2 JP 2877388B2 JP 1286491 A JP1286491 A JP 1286491A JP 28649189 A JP28649189 A JP 28649189A JP 2877388 B2 JP2877388 B2 JP 2877388B2
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- Prior art keywords
- voltage
- harmonic
- current
- power supply
- circuit
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Classifications
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- 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
- Stand-By Power Supply Arrangements (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Voltage And Current In General (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、高調波発生負荷から発生する高調波電流が
電力系統へ流出するのを抑制すると同時に高調波発生負
荷端の電圧低下を補償する電圧補償機能付高調波抑制装
置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 voltage compensation for suppressing a harmonic current generated from a harmonic generation load from flowing out to a power system and at the same time compensating for a voltage drop at a harmonic generation load end. It relates to a harmonic suppression device with a function.
従来の技術 従来、高調波発生負荷から発生する高調波電流が電力
系統へ流出するのを抑制する高調波抑制装置は、第５図
に示す回路構成であって、例えば特開昭64−60228号公
報に開示されているように公知である。2. Description of the Related Art Conventionally, a harmonic suppression device that suppresses a harmonic current generated from a harmonic generation load from flowing out to a power system has a circuit configuration shown in FIG. It is known as disclosed in the gazette.
第５図は、単一調波に共振するコンデンサとリアクト
ルの直列回路からなる同調フィルタ8aおよび8b、抵抗お
よびリアクトルの並列回路とコンデンサとの直列回路な
どからなるハイパスフィルタ8cで構成される交流フィル
タ８により高調波発生負荷９から発生する高調波電流が
電力系統へ流出するのを抑制し、かつ電源電流Isに含ま
れる高調波電流Ishを高調波検出回路５によりに検出
し、その振幅に比例した電圧を電圧発生回路７により電
力系統と直列に発生することによって、高調波電流が電
力系統へ流出するのをさらに抑制しようとするものであ
った。FIG. 5 is an AC filter composed of tuned filters 8a and 8b composed of a series circuit of a capacitor and a reactor that resonates in a single harmonic, and a high-pass filter 8c composed of a series circuit of a parallel circuit of a resistor and a reactor and a capacitor. 8, the harmonic current generated from the harmonic generation load 9 is suppressed from flowing out to the power system, and the harmonic current Ish included in the power supply current Is is detected by the harmonic detection circuit 5 and is proportional to the amplitude thereof. By generating the generated voltage in series with the power system by the voltage generation circuit 7, it is intended to further suppress the flow of the harmonic current to the power system.
第５図において、１は交流電源、４は電源電流検出変
流器、６は基準電圧作成回路、10は制御パルス発生回
路、11は電圧形インバータ、12は変成器、Vsは電源電
圧、Xs・Rsは線路インピーダンス、Lr・Crはリップル除
去フィルタ、Vcは補償電圧、IFは交流フィルタ電流、IL
は高調波発生負荷電流、VLは高調波発生負荷の端子電圧
である。In FIG. 5, 1 is an AC power supply, 4 is a power supply current detection current transformer, 6 is a reference voltage generation circuit, 10 is a control pulse generation circuit, 11 is a voltage source inverter, 12 is a transformer, Vs is a power supply voltage, Xs · Rs is the line impedance, Lr · Cr ripple elimination filter, Vc is the compensation voltage, I F is AC filter current, I L
Is the harmonic generation load current, and VL is the terminal voltage of the harmonic generation load.
発明が解決しようとする問題点 しかしながら、従来の高調波抑制装置は交流フィルタ
８の基本波進相容量が一定であり、また電圧発生回路７
が発生する電圧は基本波電圧に関与しないので、負荷変
動時の電圧低下の補償はできなかった。例えば、高調波
発生負荷９がサイリスタなどに直流モーターが接続され
ている場合、起動時に電圧低下を起こし、回転しなくな
るという問題があった。これを解決するためには、別に
電圧低下補償用の装置を設ける必要があり、従って設備
全体が大きくなり、かつ価格が高くなるなどの欠点があ
った。Problems to be Solved by the Invention However, in the conventional harmonic suppression device, the fundamental wave leading capacity of the AC filter 8 is constant, and the voltage generation circuit 7
Since the voltage generated does not contribute to the fundamental voltage, it was not possible to compensate for a voltage drop during a load change. For example, when the harmonic generation load 9 is connected to a thyristor or the like by a DC motor, there is a problem that a voltage drop occurs at the time of startup and the motor stops rotating. In order to solve this, it is necessary to separately provide a device for compensating for a voltage drop, and therefore, there are drawbacks such as an increase in the size of the entire equipment and an increase in cost.
問題点を解決するための手段 本発明の電圧補償機能付高調波抑制装置は、高調波発
生負荷と並列に接続した交流フィルタと、電源電流に含
まれる高調波電流を検出する高調波検出回路と、電源電
圧の低下を検出する電圧低下検出回路と、電源電流に含
まれる高調波電流に比例した電圧と電源電圧の低下分に
相当する電圧を加え、前記２つの電圧を合成し基準電圧
を作成する基準電圧作成回路と、電力系統に直列に前記
基準電圧に応じた補償電圧を発生する電圧発生回路とを
備え、高調波電流が電力系統へ流出するのを抑制すると
同時に、高調波発生負荷端の電圧低下を補償するように
構成したものである。Means for Solving the Problems The harmonic suppression device with a voltage compensation function of the present invention includes an AC filter connected in parallel with a harmonic generation load, a harmonic detection circuit that detects a harmonic current included in a power supply current, and A voltage drop detection circuit for detecting a drop in the power supply voltage, a voltage proportional to the harmonic current included in the power supply current and a voltage corresponding to the drop in the power supply voltage, and combining the two voltages to create a reference voltage A reference voltage generating circuit, and a voltage generating circuit that generates a compensation voltage according to the reference voltage in series with the power system. Is configured so as to compensate for the voltage drop.
作用 本発明の構成によれば、受動形の交流フィルタと併用
する高調波検出回路と電圧低下検出回路と基準電圧作成
回路と電圧発生回路からなる能動形フィルタにおいて、
電源電流に含まれる高調波電流を検出する高調波検出回
路と共に電源電圧の低下を検出する電圧低下検出回路を
設けて、従来の高調波抑制機能を損なうことなく、高調
波発生負荷端において低下する電圧を能動形フィルタで
発生して電圧低下分を補償し、高調波発生負荷端の電圧
を一定にすることができる。According to the configuration of the present invention, in an active filter including a harmonic detection circuit, a voltage drop detection circuit, a reference voltage generation circuit, and a voltage generation circuit, which are used together with a passive AC filter,
A voltage drop detection circuit that detects a drop in the power supply voltage is provided together with a harmonic detection circuit that detects a harmonic current included in the power supply current, and the voltage drops at the harmonic generation load end without impairing the conventional harmonic suppression function. The voltage is generated by the active filter to compensate for the voltage drop, and the voltage at the harmonic generation load end can be made constant.
実施例 以下、本発明の電圧補償機能付高調波抑制装置を第１
図に示す実施例について説明する。EXAMPLE Hereinafter, a harmonic suppression device with a voltage compensation function according to the present invention will be described as a first example.
The embodiment shown in the figure will be described.
電力系統に変成器12を介して高調波発生負荷９と交流
フィルタ８が並列に接続されている。一方電源電流Isを
検出するための検出用変流器４の出力は高調波検出回路
５を通して、基準電圧作成回路６へ接続されており、同
時に変成器12の入力電圧Vs′を検出するための検出用変
成器２の出力は電圧低下検出回路３を通して基準電圧作
成回路６へ接続されている。基準電圧作成回路６の出力
は電圧発生回路７の制御パルス発生回路10へ接続され、
電圧形インバータ11を通してパルス幅変調された出力電
圧はリップル除去用フィルタLr、Crを通して変成器12の
２次側へ接続されている。A harmonic generation load 9 and an AC filter 8 are connected in parallel to a power system via a transformer 12. On the other hand, the output of the detection current transformer 4 for detecting the power supply current Is is connected to the reference voltage generation circuit 6 through the harmonic detection circuit 5, and at the same time, the input voltage Vs' of the transformer 12 is detected. The output of the detecting transformer 2 is connected to a reference voltage generating circuit 6 through a voltage drop detecting circuit 3. The output of the reference voltage generation circuit 6 is connected to the control pulse generation circuit 10 of the voltage generation circuit 7,
The output voltage pulse width modulated through the voltage source inverter 11 is connected to the secondary side of the transformer 12 through the ripple removing filters Lr and Cr.
次の動作について説明する。 The following operation will be described.
電力系統に接続された高調波発生負荷９は、例えば準
ブリッジ構成の３相サイリスタ整流回路であれば、理想
状態の時 ｎ＝6k±１ …（１） ただし、ｋは正の整数 で与えられる次数ｎの高調波電流が、基本波電流に対し
て の大きさで発生する。If the harmonic generating load 9 connected to the power system is, for example, a three-phase thyristor rectifier circuit of a quasi-bridge configuration, in an ideal state, n = 6k ± 1 (1) where k is given by a positive integer. The harmonic current of order n is Occurs in the size of
そこで、高調波発生負荷９と並列に第５調波を吸収す
る単一調波フィルタ8aおよび第７調波を吸収する単一調
波フィルタ8bと、第11調波以上の高調波を吸収するハイ
パスフィルタ8cからなる交流フィルタ８を接続すること
により、高調波発生負荷９から発生した高調波電流が電
力系統へ流出しないように抑制される。しかし、交流フ
ィルタ８の残留インピーダンスの影響や非理論高調波
（例えば第２、第３、第４高調波など）の発生により、
抑制は完全にできずに、電力系統へ一部流出してしま
う。Therefore, a single harmonic filter 8a that absorbs the fifth harmonic and a single harmonic filter 8b that absorbs the seventh harmonic, and a harmonic that is higher than the eleventh harmonic are absorbed in parallel with the harmonic generation load 9. By connecting the AC filter 8 composed of the high-pass filter 8c, the harmonic current generated from the harmonic generation load 9 is suppressed so as not to flow out to the power system. However, due to the influence of the residual impedance of the AC filter 8 and the generation of non-theoretical harmonics (for example, the second, third, and fourth harmonics),
It could not be completely controlled and would partially flow out to the power system.
ここで、この電源電流Isに含まれる高調波電流Ishを
電源電流検出用変流器４と高調波検出回路５により抽出
する。高調波検出回路５は例えば、フーリエ変換、瞬時
無効電力の一般化理論の応用、バンドパスフィルタによ
るものなどがある。Here, the harmonic current Ish included in the power supply current Is is extracted by the power supply current detection current transformer 4 and the harmonic detection circuit 5. The harmonic detection circuit 5 includes, for example, a Fourier transform, application of a generalized theory of instantaneous reactive power, and a bandpass filter.
次にこの高調波電流Ishに基準電圧作成回路６におい
て、ゲインＫを乗じて高調波抑制のための基準電圧をVH
*とする。Next, the reference current generating circuit 6 multiplies the harmonic current Ish by a gain K to obtain a reference voltage for suppressing harmonics by V H.
*
式で表すと、 VH *＝Ｋ・Ish …（３） となり、変成器12の１次側にVc＝VH *の補償電圧が発生
するように電圧発生回路７を動作させると、変成器12は
等価的に電源電流Isに含まれる高調波電流Ishに対して
Ｋ（Ω）の純抵抗と見なすことができる。When expressed by the equation, V H * = K · Ish (3). When the voltage generation circuit 7 is operated such that a compensation voltage of Vc = V H * is generated on the primary side of the transformer 12, the transformer becomes Numeral 12 can be equivalently regarded as a pure resistance of K (Ω) with respect to the harmonic current Ish included in the power supply current Is.
第２図にこの時の等価回路を示す、Vshは電源電圧に
含まれる高調波電圧、Zsは電源系統の線路インピーダン
ス、Vchは変成器12の１次側で発生する補償電圧に含ま
れる高調波電圧、ZFは交流フィルタのインピーダンス、
IFhは交流フィルタに流れる高調波電流、ILhは高調波発
生負荷から発生する高調波電流である。これにより次式
が成立する。FIG. 2 shows an equivalent circuit at this time, where Vsh is the harmonic voltage included in the power supply voltage, Zs is the line impedance of the power supply system, and Vch is the harmonic included in the compensation voltage generated on the primary side of the transformer 12. voltage, Z F is the impedance of the AC filter,
I Fh is a harmonic current flowing through the AC filter, and I Lh is a harmonic current generated from a harmonic generation load. Thereby, the following equation is established.
Vch＝VH * …（４） Ish＝IFh＋ILh …（５） Vsh＝Zs・Ish＋Vch＋ZF・IFh ……（６） （３）〜（６）式を整理すると、 が導かれ、Ｋ≫ZF＋Zsとすることにより、電源電圧Vsに
含まれる高調波電圧Vshおよび高調波発生負荷から発生
する高調波電流ILhが存在しても、電源電流Isに含まれ
る高調波電流Ishは少なくできる。また同時に電源系統
の線路インピーダンスZsの影響が小さくなるため、交流
フィルタとの***振を抑制することができる。Vch = VH * (4) Ish = I Fh + I Lh (5) Vsh = Zs · Ish + Vch + Z F · I Fh (6) When formulas (3) to (6) are rearranged, And K 、 Z F + Zs, the harmonic voltage Vsh included in the power supply voltage Vs and the harmonic current I Lh generated from the harmonic generation load exist, but the harmonics included in the power supply current Is Wave current Ish can be reduced. At the same time, since the influence of the line impedance Zs of the power supply system is reduced, anti-resonance with the AC filter can be suppressed.
さらに、高調波発生負荷端での電圧低下について着目
すると、能動形フィルタの電圧発生回路から発生する電
圧を（３）式で基づくものとするだけでは、電源電流の
基本波電流に対しては何ら影響しない。交流フィルタに
ついては、高調波発生負荷の基本波無効電流を補償する
ために電圧低下の抑制に関与するが、基本波進相容量が
一定であるために一定電圧の補償しかされない。Furthermore, focusing on the voltage drop at the harmonic generating load end, if the voltage generated from the voltage generating circuit of the active filter is based only on the equation (3), the voltage of the fundamental wave of the power supply current is not affected. It does not affect. The AC filter is involved in suppressing the voltage drop in order to compensate for the reactive current of the fundamental wave generated by the harmonic generation load. However, since the fundamental wave advance capacity is constant, only the constant voltage is compensated.
したがって、例えば高調波発生負荷がサイリスタレオ
ナード装置に接続された直流モーターの場合などでは、
起動時に定常時より大きなしかも低力率の電流が電力系
統に流れるために大きな電圧低下を招き、最悪時には直
流モーターが起動しなくなる。Therefore, for example, when the harmonic generation load is a DC motor connected to the thyristor Leonard device,
At start-up, a larger current than the steady state and a lower power factor flows through the power system, causing a large voltage drop. In the worst case, the DC motor does not start.
そこで、第１図に示すように電源電流Isに含まれる高
調波電流Ishの検出と同時に、電源電圧検出用変成器２
で検出された出力電圧を電圧低下検出回路３において基
準正弦波との比較などの方法により電圧低下ΔＶを検出
し、各々を基準電圧作成回路６において（８）式のよう
に合成し、電圧発生回路７で発生すべき基準電圧Vc
*は、 Vc*＝Ｋ・Ish−ΔＶ …（８） となる。Therefore, as shown in FIG. 1, at the same time as detecting the harmonic current Ish included in the power supply current Is, the power supply voltage detecting transformer 2
The voltage drop ΔV is detected by the voltage drop detection circuit 3 by a method such as comparison with a reference sine wave in the voltage drop detection circuit 3, and the voltage drops ΔV are combined by the reference voltage generation circuit 6 as shown in equation (8) to generate a voltage. Reference voltage Vc to be generated in circuit 7
* Is Vc * = K · Ish−ΔV (8)
この基準電圧Vc*は電圧発生回路７内の制御パルス発
生回路10において、パルス幅変調し、この信号により電
圧形インバータ11のスイッチング素子が開閉して変成器
12の２次側へ基準電圧と比例した補償電圧が出力され
る。ここでLr・Crはスイッチングリップルを除去するた
めのフィルタである。This reference voltage Vc * is subjected to pulse width modulation in a control pulse generation circuit 10 in the voltage generation circuit 7, and the switching element of the voltage source inverter 11 is opened and closed by this signal to form a transformer.
A compensation voltage proportional to the reference voltage is output to the secondary side of twelve. Here, Lr · Cr is a filter for removing the switching ripple.
変成器12の１次側には２次側の電圧に比例した補償電
圧Vcが発生する。On the primary side of the transformer 12, a compensation voltage Vc proportional to the voltage on the secondary side is generated.
この時の電圧低下の補償について第３図に示す等価回
路により説明する。The compensation for the voltage drop at this time will be described with reference to an equivalent circuit shown in FIG.
VSFは電源電圧の基本波電圧、ISFは電力系統に流れる
基本波電流、VSF′は変成器12の入力電圧の基本波電
圧、VCFは電圧発生回路７で発生する電圧低下補償電
圧、VLFは高調波発生負荷の端子電圧の基本波電圧、そ
の他は第２図と同一である。いま、電圧発生回路７では
補償電圧を発生しない（VCF＝０）とすると、高調波発
生負荷端では、 ΔＶ＝VSF−VSF′ ＝VSF−VLF ＝ZF・ISF …（９） の電圧低下が発生する。ここで、電圧発生回路により、
電圧低下の補償電圧として、 VCF＝−ΔＶ …（10） の電圧を発生することにより、 VSF＝VLF …（11） すなわち、高調波発生負荷端の基本波電圧VLFは、電
源電圧の基本波電圧VSFと等しくなる。V SF is a fundamental wave voltage of the power supply voltage, I SF is a fundamental wave current flowing in the power system, V SF ′ is a fundamental wave voltage of the input voltage of the transformer 12, and V CF is a voltage drop compensation voltage generated by the voltage generating circuit 7. , V LF are the fundamental voltage of the terminal voltage of the harmonic generation load, and the others are the same as those in FIG. Now, assuming that the voltage generation circuit 7 does not generate a compensation voltage (V CF = 0), at the harmonic generation load end, ΔV = V SF −V SF ′ = V SF −V LF = Z F · I SF . 9) The voltage drop occurs. Here, by the voltage generation circuit,
By generating a voltage of V CF = −ΔV (10) as a compensation voltage for the voltage drop, V SF = V LF (11) That is, the fundamental wave voltage V LF at the load end of the harmonic generation load is equal to the power supply voltage. It becomes equal to the fundamental voltages V SF of.
この電圧低下の補償動作は各電圧・電流の基本波に関
するものであり、前述した高調波の抑制と全く同時に行
うことができる。This voltage drop compensating operation relates to the fundamental wave of each voltage and current, and can be performed at the same time as the suppression of the harmonics described above.
第４図に示すように高調波の検出回路として交流フィ
ルタ電流IFおよび高調波発生負荷電流ILを各々検出し
て、それぞれ違う伝達関数を持った高調波検出回路Ａお
よびＢにより高調波電流を抽出し、その後加算回路Ｃで
加算して基準電圧作成回路へ入力すると、高調波抑制効
果の過渡特性が改善できた。As shown in FIG. 4, an AC filter current IF and a harmonic generation load current IL are respectively detected as a harmonic detection circuit, and harmonic currents are detected by harmonic detection circuits A and B having different transfer functions. Was extracted and then added by the adding circuit C and input to the reference voltage generating circuit, whereby the transient characteristics of the harmonic suppression effect could be improved.
発明の効果 本発明の電圧補償機能付高調波抑制装置は、高調波発
生負荷と並列に接続した交流フィルタと、交流フィルタ
と電力系統の間に直列に挿入された能動形フィルタとで
構成され、電源電流に含まれる高調波電流と比較した基
準電圧と電源電圧の低下分に相当する基準電圧を加え、
能動形フィルタにより電力系統に直列にその基準電圧に
応じた補償電圧を発生することによって、交流フィルタ
のみで吸収できなかった高調波をさらに抑制すると同時
に、高調波発生負荷端での電圧低下を補償することがで
きる。The harmonic suppression device with a voltage compensation function of the present invention includes an AC filter connected in parallel with a harmonic generation load, and an active filter inserted in series between the AC filter and a power system, Add a reference voltage compared to the harmonic current included in the power supply current and a reference voltage corresponding to the drop in the power supply voltage,
By generating a compensation voltage in accordance with the reference voltage in series with the power system using an active filter, harmonics that could not be absorbed by the AC filter alone are further suppressed, and at the same time, the voltage drop at the harmonic generation load end is compensated. can do.
このため、２つの機能が１台の装置で達成できること
となり、設備全体の価格が低減できる。設置面積が小さ
くできるなどの効果があり、工業的ならびに実用的価値
大なるものである。For this reason, two functions can be achieved by one device, and the cost of the entire equipment can be reduced. This has the effect that the installation area can be reduced, and is of great industrial and practical value.
第１図は本発明の電圧補償機能付高調波抑制装置の一実
施例の構成を示す単線回路図、第２図は第１図の高調波
に対する等価回路図、第３図は第１図の基本波に対する
等価回路図、第４図は本発明に係り、高調波発生負荷の
電流と交流フィルタの電流を各々検出する場合の高調波
検出回路のブロック図、第５図は従来の高調波抑制装置
の一例の構成を示す単線回路図である。 1:交流電源、2:電源電圧検出用変成器 3:電圧低下検出回路、4:電源電流検出用変成器、5:高調
波検出回路、6:基準電圧作成回路、7:電圧発生回路、8:
交流フィルタ 9:高調波発生負荷、10:制御パルス発生回路 11:電圧形インバータ、12:変成器 Xs・Rs:線路インピーダンス Lr・Cr:リップル除去用フィルタ Is:電源電流、Vs:電源電圧、Ish:電源電流 Isに含まれる高調波電流、IL：高調波発生負荷電流、I
Lh：高調波発生負荷電流に含まれる高調波電流、IF：交
流フィルタ電流 IFh：交流フィルタ電流に含まれる高調波電流 Vc:補償電圧、Vc*：基準電圧、Vs′：変成器の入力電
圧、ΔV:電圧降下分、FL：高調波発生負荷の端子電圧FIG. 1 is a single-wire circuit diagram showing the configuration of an embodiment of a harmonic suppression device with a voltage compensation function according to the present invention, FIG. 2 is an equivalent circuit diagram for the harmonics shown in FIG. 1, and FIG. FIG. 4 is a block diagram of a harmonic detection circuit for detecting a current of a harmonic generation load and a current of an AC filter, respectively, according to the present invention. FIG. 5 is a conventional harmonic suppression circuit. FIG. 2 is a single-wire circuit diagram illustrating a configuration of an example of the device. 1: AC power supply, 2: Power supply voltage detection transformer 3: Voltage drop detection circuit, 4: Power supply current detection transformer, 5: Harmonic detection circuit, 6: Reference voltage generation circuit, 7: Voltage generation circuit, 8 :
AC filter 9: Harmonic generation load, 10: Control pulse generation circuit 11: Voltage source inverter, 12: Transformer Xs / Rs: Line impedance Lr / Cr: Ripple removal filter Is: Power supply current, Vs: Power supply voltage, Ish : Harmonic current included in power supply current Is, I L : Harmonic generation load current, I
Lh: harmonic current contained in the harmonic generation load current, I F: AC filter current I Fh: harmonic current Vc included in AC filter Current compensation voltage, Vc *: reference voltages, Vs': transformer input voltage, [Delta] V: voltage drop, F L: harmonics generation load terminal voltage
───────────────────────────────────────────────────── フロントページの続き 審査官 河合 弘明 (56)参考文献 特開 昭64−60228（ＪＰ，Ａ) 特開 昭61−164432（ＪＰ，Ａ) 特開 昭61−69333（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H02J 3/00 - 5/00 ────────────────────────────────────────────────── ─── Continuation of the front page Examiner Hiroaki Kawai (56) References JP-A-64-60228 (JP, A) JP-A-61-164432 (JP, A) JP-A-61-69333 (JP, A) ( 58) Field surveyed (Int.Cl. 6 , DB name) H02J 3/00-5/00
Claims (1)
力系統に流出する高調波電流を抑制する高調波抑制装置
において、前記高調波発生負荷と並列に接続した交流フ
ィルタと、電源電流に含まれる高調波電流を検出する高
調波検出回路と、電源電圧の低下を検出する電圧低下検
出回路と、電源電流に含まれる高調波電流に比例した電
圧と電源電圧の低下分に相当する電圧を加え、前記２つ
の電圧を合成し基準電圧を作成する基準電圧作成回路
と、電力系統に直列に前記基準電圧に応じた補償電圧を
発生する電圧発生回路とを備えた電圧補償機能付高調波
抑制装置。1. A harmonic suppression device for suppressing a harmonic current flowing from a harmonic generation load connected to a power system to a power system, comprising: an AC filter connected in parallel with the harmonic generation load; A harmonic detection circuit that detects a harmonic current that is detected, a voltage drop detection circuit that detects a drop in the power supply voltage, and a voltage that is proportional to the harmonic current included in the power supply current and a voltage that corresponds to the drop in the power supply voltage are added. , A reference voltage generating circuit for generating a reference voltage by synthesizing the two voltages, and a voltage generating circuit for generating a compensation voltage according to the reference voltage in series with a power system. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1286491A JP2877388B2 (en) | 1989-11-01 | 1989-11-01 | Harmonic suppression device with voltage compensation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1286491A JP2877388B2 (en) | 1989-11-01 | 1989-11-01 | Harmonic suppression device with voltage compensation function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03150027A JPH03150027A (en) | 1991-06-26 |
| JP2877388B2 true JP2877388B2 (en) | 1999-03-31 |
Family
ID=17705090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1286491A Expired - Fee Related JP2877388B2 (en) | 1989-11-01 | 1989-11-01 | Harmonic suppression device with voltage compensation function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2877388B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055207B (en) * | 2010-12-16 | 2012-08-01 | 南京飓能电控自动化设备制造有限公司 | Intelligent power control unit for low voltage ride through and application thereof |
| WO2014016918A1 (en) * | 2012-07-25 | 2014-01-30 | 三菱電機株式会社 | Electric power transmission device |
-
1989
- 1989-11-01 JP JP1286491A patent/JP2877388B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03150027A (en) | 1991-06-26 |
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