CN101083397A - Series-parallel isolation passive power filter - Google Patents
Series-parallel isolation passive power filter Download PDFInfo
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- CN101083397A CN101083397A CNA200710022981XA CN200710022981A CN101083397A CN 101083397 A CN101083397 A CN 101083397A CN A200710022981X A CNA200710022981X A CN A200710022981XA CN 200710022981 A CN200710022981 A CN 200710022981A CN 101083397 A CN101083397 A CN 101083397A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The invention is a series-parallel isolated passive power filter, belonging to the field of electric energy quality controller of power distribution system, comprising first capacitor, second capacitor, first reactor, second reactor, and third reactor, where the first capacitor and the first reactor form first resonant circuit connected between power supply and load, a third resonant branch circuit is connected in parallel on the load side and the second capacitor and second reactor are connected in parallel to compose second resonant branch circuit which is connected in series with the third reactor to compose the third resonant branch circuit. The load-side closed circuit of harmonic waves on power supply side is isolated; the second resonant branch circuit is infinite impedance to base wave, increasing load power factor; the third resonant branch circuit is zero impedance to the lowest-order harmonic wave and extremely low impedance to other harmonic waves.
Description
Technical field
The invention provides a kind of reactor capacitor series parallel resonance power filter device, belong to Harmonious Waves in Power Systems abatement equipment field.
Background technology
Current harmonics in the electric power system is mainly derived from the nonlinear load that contains the rectification link as frequency converter, intermediate frequency furnace etc.Along with the extensive use of these nonlinear loads, the current harmonics in the electric power system is more and more, and the quality of power supply goes from bad to worse, thereby the current harmonics that these nonlinear loads produce is carried out filtering seems very urgent.Being used at present the major programme of filtering current harmonics in the electric power system has two kinds, and a kind of is traditional passive filtering (as adopting filter circuit filtering such as single tuning, double tunning), and another is to adopt active filter to carry out filtering.The passive filter that traditional passive filtering scheme adopts is simple in structure, technology maturation, input cost are low, but filter effect is subject to influences such as multiple factor such as system frequency fluctuation, variations in temperature, device aging, these factors can cause filter off-resonance state, filter effect variation.Active power filtering can carry out real-time filtering to harmonic wave, but control complexity, cost an arm and a leg, and being subjected to the constraint of power electronic device rated voltage rated current, the active power filtering capacity can not be done very greatly, so still first-selected passive filter when present many enterprises carry out harmonic wave control.
Traditional passive filter also can flow through the fundamental current of some in the filtering harmonic current, this fundamental current can provide certain first-harmonic capacitive reactive power to electrical network.Yet, the nonlinear load that contains the rectification link does not absorb idle when full load basically from the AC system before the rectification link, as adopt traditional passive filter come to rectification load carry out filtering then passive filter can in AC system, inject idlely, can reduce the power factor of rectification load so on the contrary.Especially when rectification load in underloading or when unloaded, passive filter injects in AC system idlely is enough to make that the power factor of rectification load front side AC system is reduced near zero, this idle overcompensation meeting causes the rising of AC system local voltage even surpasses limit value, bring harmful effect to equipment and operation, also can flow through the active loss that the alternating current circuit increases circuit in addition because of idle, this idle overcompensation is that power supply department is unacceptable, and corresponding electricity charge punishment will be quite strict.Article " discussion of filtering compensation system parallel resonance and overcompensation problem " (" light metal " 2006 the 8th phases) has corresponding elaboration to the idle problem that present passive filter brought.In addition, along with the increase of harmonic source in the electric power system, higher Harmonics in Electric Power Network has had a strong impact on the passive filtering effect of power consumer as independent part.Therefore the isolation to harmonic wave is an effective way of administering harmonic wave, reducing the filtering cost.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of series-parallel isolation passive power filter, this electric-power filter is utmost point Low ESR to harmonic wave, and filter effect is remarkable.
Technical scheme: for solving the problems of the technologies described above, the series-parallel isolation passive power filter that the present invention proposes is by the first capacitor C among Fig. 1
1, the second capacitor C
2, the first reactor L
1, the second reactor L
2, the 3rd reactor L
3Form, it is characterized in that: the first capacitor C
1With the first reactor L
1Constitute the first resonance branch road and be connected between power supply and the load, at load-side the 3rd resonance branch road in parallel, this route second capacitor C
2With the second reactor L
2In parallel constitute behind the second resonance branch road again and the 3rd reactor L
3Series connection constitutes the 3rd resonance branch road of minimum subharmonic.Following several method of attachment can be arranged on this basis,
Series connection the 3rd capacitor constitutes multiresonant circuit in described the 3rd resonance branch road.
The 3rd reactor L in described the 3rd resonance branch road
3Other resistance in parallel constitutes high-pass filtering circuit.
The first resonance branch road and the 3rd resonant circuit are connected to the transformer both sides respectively.
The 3rd resonant circuit is connected with electrical network after connecting with wye connection or triangular form again.
Satisfy following relation among Fig. 1 between each parameter:
L
1C
1＝1/ω
0 2
L
2C
2＝1/ω
0 2
L
2＝(n
2-1)L
3
In the formula, the first-harmonic angular frequency
0=2 π f
0(wherein, f
0Be system's fundamental frequency), n is the harmonic number of minimum subharmonic.
Operation principle: among Fig. 1, because the first capacitor C
1With the first reactor L
1Series connection, and their parameter value satisfies relational expression L
1C
1=1/ ω
0 2So,, they constitute the first resonance branch road is the fundamental series resonance circuit, and this series resonant circuit presents zero impedance to first-harmonic, can make the harmless inflow of fundamental current, and then impedance is bigger for harmonic wave, has so just isolated mains by harmonics.The second capacitor C
2With the second reactor L
2Parallel connection, their parameter value satisfies relational expression L
2C
2=1/ ω
0 2So, they constitute the second resonance branch road is the first-harmonic antiresonant circuit, this first-harmonic antiresonant circuit is infinite-impedance to first-harmonic, can stop the inflow of fundamental current, simultaneously, this second resonance branch road is for minimum subharmonic, be equivalent to a capacitor again, thereby, as the 3rd reactor L
3Parameter value satisfy relational expression L
3=(n
2-1) L
2(in the formula: n is the harmonic number of minimum subharmonic), this branch road is to nth harmonic generation series resonance, L like this
2, C
2, L
3Just constituted the 3rd resonance branch road harmonic resonance circuit of promptly connecting, this circuit is zero impedance to the minimum subharmonic current of wanting filtering, other subharmonic current is Low ESR, and the harmonic current that load is produced all flows into the 3rd resonance branch road, has realized the filtering of harmonic wave.
As optimization of the present invention, above-mentioned common reactor all can adopt adjustable reactor.
Beneficial effect: the invention has the advantages that: the first resonance branch road is not influencing under the situation that fundamental current passes through, and the injection of insulating power supply side harmonic current guarantees that the 3rd resonance harmonic wave that branch road is filtered is the harmonic wave that load itself produces; The second resonance branch road is infinite-impedance to first-harmonic, reduces the first-harmonic loss, not can with system's other parts generation first-harmonic resonance; The 3rd resonance branch road is zero impedance to minimum subharmonic, and other subharmonic is utmost point Low ESR, and filter effect is remarkable.
Description of drawings
Fig. 1 is the structural representation of series-parallel isolation passive power filter.
Fig. 2 is the execution mode that series-parallel isolation passive power filter the 3rd resonance branch road adopts multiple-tuned.
Fig. 3 is the execution mode that series-parallel isolation passive power filter the 3rd resonance branch road adopts high-pass filtering.
Fig. 4 is the execution mode that series-parallel isolation passive power filter first resonance branch road and the 3rd resonance branch road are connected to the transformer both sides respectively.
Fig. 5 is the execution mode that series-parallel isolation passive power filter connects with delta connection.
Fig. 6 is the execution mode that series-parallel isolation passive power filter connects with wye connection.
Embodiment
A kind of series-parallel isolation passive power filter of the present invention is by the first capacitor C
1, the second capacitor C
2, the first reactor L
1, the second reactor L
2, the 3rd reactor L
3Form, it is characterized in that: the first capacitor C
1With the first reactor L
1Form the first resonance branch road 1 and be connected between electrical network and the user, at load-side the 3rd resonance branch road 3 in parallel, this route second capacitor C
2With the second reactor L
2Back in parallel constitute the second resonance branch road 2 again with the 3rd reactor L
3Series connection constitutes the series resonant circuit of minimum subharmonic.
Series connection the 3rd capacitor C in described the 3rd resonance branch road 3
3, constitute multiresonant circuit 3.The 3rd reactor L in described the 3rd resonance branch road 3
3Other resistance R in parallel constitutes high-pass filtering circuit 3.The first resonance branch road 1 and the 3rd resonance branch road 3 are connected to transformer T both sides respectively.The 3rd resonance branch road is connected with electrical network after connecting with star-like or triangular form again.
The 3rd resonance branch road is zero impedance to the minimum subharmonic current of wanting filtering.The result is exactly: minimum subharmonic current almost all flows into the 3rd resonance branch road, and first-harmonic does not then flow into this branch road.The first reactor L
1With the first capacitor C
1Satisfy multiplication relationship: L
1C
1=1/ ω
0 2, the second reactor L
2With the second capacitor C
2Satisfy multiplication relationship: L
2C
2=1/ ω
0 2, ω wherein
0Be first-harmonic angular frequency, ω
0=2 π f
0, f
0=50Hz.The second reactor L
2With the 3rd reactor L
3Satisfy multiple relational expression: L
2=(n
2-1) L
3, wherein n is the harmonic number of minimum subharmonic.
This circuit first resonance branch road is the fundamental series resonance branch road, allows fundamental current to pass through, and stops the harmonic wave between mains side and the load-side to flow, thereby realizes the harmonic wave that load produced is administered separately; The second resonance branch road is a first-harmonic parallel resonance branch road, and the blocking-up fundamental current flows through at the second resonance branch road, thereby eliminates the influence of filter circuit to fundamental wave reactive power power; The 3rd resonance branch road is minimum subharmonic series resonance branch road, and harmonic wave is presented Low ESR, thus the harmonic wave that filtering load self produces.
Claims (5)
1, a kind of series-parallel isolation passive power filter is by the first capacitor (C
1), the second capacitor (C
2), the first reactor (L
1), the second reactor (L
2), the 3rd reactor (L
3) form, it is characterized in that: the first capacitor (C
1) and the first reactor (L
1) form the first resonance branch road (1) and be connected between electrical network and the user, at load-side the 3rd resonance branch road (3) in parallel, this route second capacitor (C
2) and the second reactor (L
2) back in parallel constitute the second resonance branch road (2) again with the 3rd reactor (L
3) connecting constitutes the series resonant circuit of minimum subharmonic.
2, a kind of series-parallel isolation passive power filter according to claim 1 is characterized in that: series connection the 3rd capacitor (C in described the 3rd resonance branch road (3)
3), constitute multiresonant circuit (3).
3, a kind of series-parallel isolation passive power filter according to claim 1 is characterized in that: the 3rd reactor (L in described the 3rd resonance branch road (3)
3) an other resistance (R) in parallel, constitute high-pass filtering circuit (3).
4, a kind of series-parallel isolation passive power filter according to claim 1 is characterized in that: the first resonance branch road (1) is connected to transformer (T) both sides respectively with the 3rd resonance branch road (3).
5, a kind of series-parallel isolation passive power filter according to claim 1 is characterized in that: the 3rd resonance branch road is connected with electrical network after connecting with star-like or triangular form again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710022981XA CN100541967C (en) | 2007-05-29 | 2007-05-29 | A kind of series-parallel isolation passive power filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710022981XA CN100541967C (en) | 2007-05-29 | 2007-05-29 | A kind of series-parallel isolation passive power filter |
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| Publication Number | Publication Date |
|---|---|
| CN101083397A true CN101083397A (en) | 2007-12-05 |
| CN100541967C CN100541967C (en) | 2009-09-16 |
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|---|---|---|---|
| CNB200710022981XA Expired - Fee Related CN100541967C (en) | 2007-05-29 | 2007-05-29 | A kind of series-parallel isolation passive power filter |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820260A (en) * | 2010-04-27 | 2010-09-01 | 中国计量科学研究院 | Waveform purifier and waveform purifying method |
| CN102354978A (en) * | 2011-09-01 | 2012-02-15 | 李子晗 | Second-order wave-blocking high-pass filter for tractive power supply and three-phase power supply system |
| DE102012216266A1 (en) | 2012-09-13 | 2014-03-13 | Siemens Aktiengesellschaft | Method and device for producing a filter and filter |
| CN104135005A (en) * | 2014-08-14 | 2014-11-05 | 西南交通大学 | Low-resistance and high-pass filter |
| CN104362629A (en) * | 2014-10-27 | 2015-02-18 | 国家电网公司 | Harmonic electric energy recycling device |
| CN104659786A (en) * | 2015-02-04 | 2015-05-27 | 贵州电网公司电网规划研究中心 | Device for separating and eliminating resonance between power distribution network and electric equipment, and using method of device |
| CN106992521A (en) * | 2017-04-14 | 2017-07-28 | 中国电力科学研究院 | A kind of power filter device with first-harmonic resonance unit and method |
| CN107230980A (en) * | 2017-07-07 | 2017-10-03 | 华中科技大学 | A kind of series hybrid active power filter only containing single passive filtering branch road |
| CN107230981A (en) * | 2017-07-07 | 2017-10-03 | 华中科技大学 | A kind of Series Hybrid Type Active Power Filters containing harmonic pad |
| CN107248743A (en) * | 2017-07-21 | 2017-10-13 | 华中科技大学 | A kind of active electric filter device for specifying subharmonic |
| CN109510207A (en) * | 2018-11-21 | 2019-03-22 | 中国南方电网有限责任公司超高压输电公司 | High-frequency harmonic isolating device and its working method |
| CN111509720A (en) * | 2020-05-15 | 2020-08-07 | 广东电网有限责任公司清远供电局 | Hybrid passive power filter and three-phase power system |
| CN112202322A (en) * | 2020-08-19 | 2021-01-08 | 厦门大学 | Method for inhibiting secondary ripple current based on equivalent zero impedance of active negative capacitor |
| CN115377980A (en) * | 2022-10-25 | 2022-11-22 | 山东华天电气有限公司 | Active resonance suppression system, method and device for intermediate frequency furnace power distribution system |
| WO2023005755A1 (en) * | 2021-07-27 | 2023-02-02 | 北京北方华创微电子装备有限公司 | Susceptor bias adjustment apparatus and method, and semiconductor process device |
-
2007
- 2007-05-29 CN CNB200710022981XA patent/CN100541967C/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820260A (en) * | 2010-04-27 | 2010-09-01 | 中国计量科学研究院 | Waveform purifier and waveform purifying method |
| CN101820260B (en) * | 2010-04-27 | 2014-02-19 | 中国计量科学研究院 | Waveform purifier and waveform purifying method |
| CN102354978A (en) * | 2011-09-01 | 2012-02-15 | 李子晗 | Second-order wave-blocking high-pass filter for tractive power supply and three-phase power supply system |
| DE102012216266A1 (en) | 2012-09-13 | 2014-03-13 | Siemens Aktiengesellschaft | Method and device for producing a filter and filter |
| WO2014040901A1 (en) | 2012-09-13 | 2014-03-20 | Siemens Aktiengesellschaft | Method and device for producing a filter, and a filter |
| CN104135005A (en) * | 2014-08-14 | 2014-11-05 | 西南交通大学 | Low-resistance and high-pass filter |
| CN104362629A (en) * | 2014-10-27 | 2015-02-18 | 国家电网公司 | Harmonic electric energy recycling device |
| CN104659786A (en) * | 2015-02-04 | 2015-05-27 | 贵州电网公司电网规划研究中心 | Device for separating and eliminating resonance between power distribution network and electric equipment, and using method of device |
| CN106992521A (en) * | 2017-04-14 | 2017-07-28 | 中国电力科学研究院 | A kind of power filter device with first-harmonic resonance unit and method |
| CN107230980A (en) * | 2017-07-07 | 2017-10-03 | 华中科技大学 | A kind of series hybrid active power filter only containing single passive filtering branch road |
| CN107230981A (en) * | 2017-07-07 | 2017-10-03 | 华中科技大学 | A kind of Series Hybrid Type Active Power Filters containing harmonic pad |
| CN107248743A (en) * | 2017-07-21 | 2017-10-13 | 华中科技大学 | A kind of active electric filter device for specifying subharmonic |
| CN109510207A (en) * | 2018-11-21 | 2019-03-22 | 中国南方电网有限责任公司超高压输电公司 | High-frequency harmonic isolating device and its working method |
| CN111509720A (en) * | 2020-05-15 | 2020-08-07 | 广东电网有限责任公司清远供电局 | Hybrid passive power filter and three-phase power system |
| US11901733B2 (en) | 2020-05-15 | 2024-02-13 | Qingyuan Power Supply Bureau Of Guangdong Power Grid Corporation | Hybrid passive power filter and three-phase power system |
| CN112202322A (en) * | 2020-08-19 | 2021-01-08 | 厦门大学 | Method for inhibiting secondary ripple current based on equivalent zero impedance of active negative capacitor |
| WO2023005755A1 (en) * | 2021-07-27 | 2023-02-02 | 北京北方华创微电子装备有限公司 | Susceptor bias adjustment apparatus and method, and semiconductor process device |
| CN115377980A (en) * | 2022-10-25 | 2022-11-22 | 山东华天电气有限公司 | Active resonance suppression system, method and device for intermediate frequency furnace power distribution system |
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| Publication number | Publication date |
|---|---|
| CN100541967C (en) | 2009-09-16 |
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Assignee: China Rollary Digital Technology (Shanghai) Co., Ltd. Assignor: Southeast University Contract record no.: 2011990000513 Denomination of invention: Series-parallel isolation passive power filter Granted publication date: 20090916 License type: Exclusive License Open date: 20071205 Record date: 20110630 |
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Granted publication date: 20090916 Termination date: 20130529 |