GB1472411A - Harmonic and power factor compensation for power systems - Google Patents
Harmonic and power factor compensation for power systemsInfo
- Publication number
- GB1472411A GB1472411A GB4083674A GB4083674A GB1472411A GB 1472411 A GB1472411 A GB 1472411A GB 4083674 A GB4083674 A GB 4083674A GB 4083674 A GB4083674 A GB 4083674A GB 1472411 A GB1472411 A GB 1472411A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filter
- load
- frequency
- harmonic
- power factor
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/08—Control, e.g. of temperature, of power using compensating or balancing arrangements
-
- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1828—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepwise control, the possibility of switching in or out the entire compensating arrangement not being considered as stepwise control
-
- 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
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
1472411 Filters INDUCTOTHERM CORP 19 Sept 1974 40836/74 Heading H3V [Also in Division H2] To reduce harmonic currents in a power supply system for a load 20 and comprising a non-linear device 22, e.g. a saturable reactor or S.C.R., a filter network 24 is provided which comprises a filter F3, &c for each harmonic to be reduced, each filter being tuned to a frequency less than its corresponding harmonic frequency and having a net inductive reactance at the corresponding harmonic frequency. The capacitors of the filter network 24 provide a leading power factor at the fundamental power supply frequency to compensate for a lagging power factor component introduced by the device 22. The load 20 may be an induction furnace corrected, e.g. by a capacitor, to have unity power factor at the fundamental frequency. Alternatively, the load may be lighting or heating generally, and static frequency multipliers may also be included. Given the line reactance X 1 and the amount of harmonic current which it is permitted to reflect back into the supply E 1 , calculations are made to determine the values of the elements in network 24 in terms of the load R. To enable the power factor at relatively high and low power levels to be corrected, the filter F 3 , may comprise two parallel branches (Fig. 6, not shown), which are selectively connectible across the load by respective switches (34, 36). A third switch (38) interconnects the two branches. Filter F 5 may be similarly sectionalized.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4083674A GB1472411A (en) | 1974-09-19 | 1974-09-19 | Harmonic and power factor compensation for power systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4083674A GB1472411A (en) | 1974-09-19 | 1974-09-19 | Harmonic and power factor compensation for power systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1472411A true GB1472411A (en) | 1977-05-04 |
Family
ID=10416872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4083674A Expired GB1472411A (en) | 1974-09-19 | 1974-09-19 | Harmonic and power factor compensation for power systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1472411A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2132428A (en) * | 1981-11-23 | 1984-07-04 | Ronald Aurel Lesea | Power factor modifying network |
DE3338629A1 (en) * | 1983-10-25 | 1985-05-02 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | THREE-PHASE FILTER CIRCUIT FOR RECTIFIER SYSTEMS |
US4724333A (en) * | 1985-04-10 | 1988-02-09 | Electric Power Research Institute | Method and means for damping supersynchronous oscillations in an ac power system |
GB2224407A (en) * | 1988-10-28 | 1990-05-02 | David Michael Rusby | Reducing impedance of mains supply and mains filter |
EP0949738A3 (en) * | 1998-04-09 | 1999-11-24 | Alstom UK Limited | Improvements in or relating to the application of power-factor correction in ac power systems |
CN112865103A (en) * | 2020-12-31 | 2021-05-28 | 天津经纬正能电气设备有限公司 | System design method for eliminating harmonic resonance of wind power plant emergency power supply system |
CN117348499A (en) * | 2023-11-24 | 2024-01-05 | 山东鼎晟电气科技有限公司 | Remote regulation and control system based on series resonance intermediate frequency induction smelting furnace |
CN117479363A (en) * | 2023-12-28 | 2024-01-30 | 西安慧金科技有限公司 | High-voltage induction heating molten salt system for energy storage |
-
1974
- 1974-09-19 GB GB4083674A patent/GB1472411A/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2132428A (en) * | 1981-11-23 | 1984-07-04 | Ronald Aurel Lesea | Power factor modifying network |
DE3338629A1 (en) * | 1983-10-25 | 1985-05-02 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | THREE-PHASE FILTER CIRCUIT FOR RECTIFIER SYSTEMS |
US4724333A (en) * | 1985-04-10 | 1988-02-09 | Electric Power Research Institute | Method and means for damping supersynchronous oscillations in an ac power system |
GB2224407A (en) * | 1988-10-28 | 1990-05-02 | David Michael Rusby | Reducing impedance of mains supply and mains filter |
EP0949738A3 (en) * | 1998-04-09 | 1999-11-24 | Alstom UK Limited | Improvements in or relating to the application of power-factor correction in ac power systems |
CN112865103A (en) * | 2020-12-31 | 2021-05-28 | 天津经纬正能电气设备有限公司 | System design method for eliminating harmonic resonance of wind power plant emergency power supply system |
CN117348499A (en) * | 2023-11-24 | 2024-01-05 | 山东鼎晟电气科技有限公司 | Remote regulation and control system based on series resonance intermediate frequency induction smelting furnace |
CN117348499B (en) * | 2023-11-24 | 2024-02-27 | 山东鼎晟电气科技有限公司 | Remote regulation and control system based on series resonance intermediate frequency induction smelting furnace |
CN117479363A (en) * | 2023-12-28 | 2024-01-30 | 西安慧金科技有限公司 | High-voltage induction heating molten salt system for energy storage |
CN117479363B (en) * | 2023-12-28 | 2024-03-22 | 西安慧金科技有限公司 | High-voltage induction heating molten salt system for energy storage |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |