Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
  • H02J3/01—Arrangements for reducing harmonics or ripples
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
  • H02M1/00—Details of apparatus for conversion
  • H02M1/12—Arrangements for reducing harmonics from ac input or output
  • H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
• • 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

Definitions

• the invention relates to a filter arrangement for filtering and damping harmonics or higher-frequency vibration packets and for shifting resonance points in electrical networks.
• low-frequency harmonics which arise, for example, from load shedding due to transformer saturation, in connection with resonance points can lead to significant overvoltages and voltage distortions that are sensitive to normal network operation.
• DE-OS 35 39 950 deals with a high-pass filter arrangement for a connected to converters
• EP-A-0 318 790 proposes a high pass filter arrangement for a line connected to converters.
• a C-link with an L-link and a parallel path is connected in series, an L-link of a series connection consisting of an R-link and a C-link being arranged in parallel in the parallel path.
• a further R element is arranged in parallel with the series connection part of the L element and the parallel path.
• a first and a second series-connected C-element are connected in series with a parallel path consisting of a surge arrester and an L-element, and an R-element is connected in parallel to the series circuit part of the second C-element and the L-element arranged.
• the disadvantage of this circuit is that only the harmonic currents of only one tuning frequency can be sucked out of the network and attenuated in the process.
• a first C-element is connected in series with a parallel path, which consists of a series circuit consisting of a second C-element and a first L-element and a series circuit consisting of a voltage-dependent resistor and an R-element is constructed; the series connection part of the two C-elements is a
• the object of the invention is to provide a filter arrangement with which sufficient damping for two tuning frequencies can be achieved and with which the losses due to operating frequency currents are limited to a minimum.
• the object is achieved by the invention.
• This is characterized in that a first inductance and a first capacitance are arranged in a series circuit, and in that this series circuit is connected with a first damping element to a first parallel path, and in that the first parallel path with one of a second inductance and a second Capacity existing second parallel path and a third capacitance is connected in series.
• a further development of the invention is that the first inductance with the first capacitance and one fourth capacitance is arranged in a series circuit such that the first capacitance is arranged between the first inductance and the fourth capacitance, and that this series circuit is connected to an expanded first parallel path with the first damping element, and that this first expanded parallel path with the second parallel path and is connected in series with the third capacitance in such a way that the third capacitance is connected on the one hand to a line pole and on the other hand to the connecting line from the first damping element to the first inductor, and the second parallel path on the one hand to the connecting line from the first damping element to the fourth capacitance and on the other hand is connected to a grounding pole and that a second damping element is connected to the connecting line from the first capacitance to the fourth capacitance on the one hand and to ground potential directly or via current transformers on the other.
• One embodiment of the invention provides that the first inductance is arranged between the first capacitance and the fourth capacitance, and that the third
• Capacity is connected on the one hand to the line pole and on the other hand to a connecting line from the first damping element to the first capacity.
• FIG. 1 shows the simplest form of a filter arrangement according to the invention
• FIG. 2 shows a filter arrangement with increased damping
• FIG. 3 shows a filter arrangement with a special characteristic curve, while the circuit shown in FIG. 4 ensures optimization of all important characteristic values.
• FIG. 1 shows the simplest basic form of a filter arrangement according to the invention.
• An ohmic resistor (R p21 ) is arranged in parallel with a series circuit consisting of a first inductance (L p2 ) and a first capacitance (C p21 ) as the first damping element.
• This parallel connection is connected in series with a parallel path consisting of a second inductance (L p3 ) and a second capacitance (C p3 ) and with a third capacitance (C 1 ).
• FIG. 2 shows an expansion of the circuit according to FIG. 1.
• the series circuit consisting of a first inductance (L p2 ) and a first capacitance (C p21 ) is a fourth capacitance (C p21 ) the first capacitance (C p21 ) then connected in series.
• a second ohmic resistor (R p41 ) of the series circuit of the fourth capacitance (C p22 ) and the second capacitance (C p3 ) is connected in parallel. This simple circuit expansion by means of the capacitance (R p22 ) and the resistance (R p41 ) makes the
• FIG. 3 shows a further development of the circuit shown in FIG. 2.
• the first ohmic resistor (R p21 ) is expanded with a first varistor (V p2 ) to form a series connection, and this series connection is made up of a first inductance (L p2 ), a first capacitance (C p21 ) and a fourth capacitance ( C p22 ) existing series connection connected in parallel.
• the second ohmic resistor (R p41 ) is expanded with a second varistor (V p4 ) to form a series connection. This series circuit is connected in parallel with the fourth capacitance (C p22 ) and the second capacitance (C p3 ).
• the filter arrangement shown in FIG. 3 has a very steep impedance characteristic with an impedance minimum with two tuning resonances. The greatest possible damping occurs with a higher harmonic content.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Supply And Distribution Of Alternating Current (AREA)
• Filters And Equalizers (AREA)

Priority Applications (3)

Applications Claiming Priority (4)

Publications (1)

Family

ID=25595156

Family Applications (1)

Country Status (8)

Cited By (3)

Citations (5)

• 1990
  • 1990-12-07 CS CS906110A patent/CS611090A3/cs unknown
  • 1990-12-07 WO PCT/AT1990/000118 patent/WO1991009451A1/de not_active Application Discontinuation
  • 1990-12-07 JP JP50089690A patent/JPH05502364A/ja active Pending
  • 1990-12-07 BR BR909007897A patent/BR9007897A/pt not_active Application Discontinuation
  • 1990-12-07 EP EP91900121A patent/EP0502929A1/de not_active Ceased
  • 1990-12-07 HU HU921884A patent/HUT61140A/hu unknown
  • 1990-12-07 CA CA 2074260 patent/CA2074260A1/en not_active Abandoned
• 1992
  • 1992-06-05 FI FI922617A patent/FI922617A0/fi not_active Application Discontinuation

Patent Citations (5)

Non-Patent Citations (1)

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