CN205178510U - High-power passive low-pass filtering device - Google Patents
High-power passive low-pass filtering device Download PDFInfo
- Publication number
- CN205178510U CN205178510U CN201521013551.8U CN201521013551U CN205178510U CN 205178510 U CN205178510 U CN 205178510U CN 201521013551 U CN201521013551 U CN 201521013551U CN 205178510 U CN205178510 U CN 205178510U
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- circuit
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- voltage
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- 238000001914 filtration Methods 0.000 title 1
- 239000003990 capacitor Substances 0.000 claims abstract description 44
- 238000001514 detection method Methods 0.000 claims abstract description 23
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- 239000002131 composite material Substances 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 4
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
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
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model relates to a power passive low-pass filter device, which comprises a switching device, a circular ring reactor and a capacitor; the throw-cut device, the annular reactor and the capacitor are connected in series and then connected in parallel in a circuit, and the capacitor is switched by utilizing the combination of the voltage zero-crossing detection circuit and the current zero-crossing detection circuit, so that the surge current is not generated in the switching of the capacitor, and the device has very important significance for ensuring the safe operation of a power system.
Description
Technical field
The utility model relates to a kind of high-power passive type low-pass filter, has very important significance to guarantee capacitor safe reliability service.
Background technology
The high speed development of current national economy and living standards of the people improve constantly the rapid growth bringing electric load, meanwhile, along with the opening of electricity market, power consumer proposes new requirement to the quality of power supply, this ever of power supply and demand enterprise is made all more to pay attention to power system operation fail safe, economy and energy-conserving and environment-protective joint, reactive power compensation is the most direct as one, the most effective power-saving technology, become the mandatory requirement of power supply department to user, be widely used at present, reactive power compensation technology also reaches its maturity, scientific and technological content is improving constantly.But in recent years because the power electronic equipment of various novelty comes into operation, non-linear load constantly increases makes electric load character become very complicated, harmonic component increases, severe contamination network system, in order to the safe high-quality meeting electric power system runs, the utility model proposes a kind of high-power passive type low-pass filter for this reason, utilize voltage zero-crossing detection circuit and current over-zero testing circuit composite type switched capacitor, ensure that capacitor switching does not produce to shove, to ensureing that the safe operation of electric power system has very important significance.
Utility model content
Technical problem to be solved in the utility model is, how to use voltage zero-crossing detection circuit and current over-zero testing circuit composite type switched capacitor, realizes the reliable switching of capacitor.
For solving the problems of the technologies described above, the utility model provides a kind of power passive formula low-pass filter, comprises switching device, annulus reactor, capacitor; After switching device, annulus reactor, capacitor are cascaded, parallel connection in the line.
Switching device adopts the special fling-cut switch of electric capacity, can select voltage over zero switched capacitor, also can select current zero-crossing point switched capacitor.
Annulus reactor adopts amorphous alloy material coiling, and sectional area, at 6-15 square centimeter, limits instantaneous large-current.
Capacitor adopts the power capacitor of band self discharge resistance, according to harmonic inhabitation situation, adopts various combination between annulus reactor and capacitor, depends primarily on harmonic inhabitation number of times.
The special fling-cut switch of electric capacity comprises voltage zero-crossing detection circuit, current over-zero testing circuit, control inputs circuit, microcontroller circuit, controllable silicon drive circuit, controllable silicon, power circuit, condition indication circuit, harmonics detection circuit; The output of voltage zero-crossing detection circuit, current over-zero testing circuit, control inputs circuit, harmonics detection circuit is connected with the I/O mouth of microcontroller circuit respectively; Controllable silicon drive circuit is connected with the I/O mouth of microcontroller circuit respectively with the input of control inputs circuit; The output of controllable silicon drive circuit is connected with SCR control end; The output of power circuit is connected with the power end of microcontroller circuit.
Voltage zero-crossing detection circuit can detect the voltage over zero moment, does not produce shove when voltage over zero moment switching capacitance; When there is a large amount of harmonic wave in current supply circuit, may exist and cannot find the voltage real zero crossing moment, multiple zero crossing may be there is in circuit, now utilize current over-zero testing circuit, before switching, capacitor is full of electricity, adopt at voltage max moment switched capacitor, do not produce when current zero-crossing point moment switching capacitance and shove; Utilize voltage zero-crossing detection circuit and current over-zero testing circuit composite type switched capacitor, ensure that capacitor switching does not produce and shove.
Good effect of the present utility model is: (1) utilizes voltage zero-crossing detection circuit and current over-zero testing circuit composite type switched capacitor, ensure that capacitor switching does not produce and shoves; (2) adopt amorphous alloy material coiling annulus reactor, sectional area is at 6-15 square centimeter, and unsaturated during small area analysis, during big current, iron core is in saturation condition, and restriction instantaneous large-current, realizes duplicate protection to controllable silicon.
Accompanying drawing explanation
Fig. 1 is high-power passive type low-pass filter principle assumption diagram.
Fig. 2 is the special fling-cut switch principle assumption diagram of electric capacity.
Embodiment
As shown in Figure 1, a kind of power passive formula low-pass filter, comprises switching device, annulus reactor, capacitor; After switching device, annulus reactor, capacitor are cascaded, parallel connection in the line.
Switching device adopts the special fling-cut switch of electric capacity, can select voltage over zero switched capacitor, also can select current zero-crossing point switched capacitor.
Annulus reactor adopts amorphous alloy material coiling, and sectional area, at 6-15 square centimeter, limits instantaneous large-current.
Capacitor adopts the power capacitor of band self discharge resistance, according to harmonic inhabitation situation, adopts various combination between annulus reactor and capacitor, depends primarily on harmonic inhabitation number of times.
As shown in Figure 2, the special fling-cut switch of electric capacity comprises voltage zero-crossing detection circuit, current over-zero testing circuit, control inputs circuit, microcontroller circuit, controllable silicon drive circuit, controllable silicon, power circuit, condition indication circuit, harmonics detection circuit; The output of voltage zero-crossing detection circuit, current over-zero testing circuit, control inputs circuit, harmonics detection circuit is connected with the I/O mouth of microcontroller circuit respectively; Controllable silicon drive circuit is connected with the I/O mouth of microcontroller circuit respectively with the input of control inputs circuit; The output of controllable silicon drive circuit is connected with SCR control end; The output of power circuit is connected with the power end of microcontroller circuit.
Voltage zero-crossing detection circuit can detect the voltage over zero moment, does not produce shove when voltage over zero moment switching capacitance; When there is a large amount of harmonic wave in current supply circuit, may exist and cannot find the voltage real zero crossing moment, multiple zero crossing may be there is in circuit, now utilize current over-zero testing circuit, before switching, capacitor is full of electricity, adopt at voltage max moment switched capacitor, do not produce when current zero-crossing point moment switching capacitance and shove; Utilize voltage zero-crossing detection circuit and current over-zero testing circuit composite type switched capacitor, ensure that capacitor switching does not produce and shove.
Claims (6)
1. high-power passive type low-pass filter, is characterized in that: comprise switching device, annulus reactor, capacitor; After switching device, annulus reactor, capacitor are cascaded, parallel connection in the line.
2. high-power passive type low-pass filter according to claim 1, is characterized in that: switching device adopts the special fling-cut switch of electric capacity, can select voltage over zero switched capacitor, also can select current zero-crossing point switched capacitor.
3. high-power passive type low-pass filter according to claim 1, is characterized in that: annulus reactor adopts amorphous alloy material coiling, and sectional area, at 6-15 square centimeter, limits instantaneous large-current.
4. high-power passive type low-pass filter according to claim 2, it is characterized in that: capacitor adopts the power capacitor of band self discharge resistance, according to harmonic inhabitation situation, between annulus reactor and capacitor, adopt various combination, depend primarily on harmonic inhabitation number of times.
5. high-power passive type low-pass filter according to claim 2, is characterized in that: the special fling-cut switch of electric capacity comprises voltage zero-crossing detection circuit, current over-zero testing circuit, control inputs circuit, microcontroller circuit, controllable silicon drive circuit, controllable silicon, power circuit, condition indication circuit, harmonics detection circuit; The output of voltage zero-crossing detection circuit, current over-zero testing circuit, control inputs circuit, harmonics detection circuit is connected with the I/O mouth of microcontroller circuit respectively; Controllable silicon drive circuit is connected with the I/O mouth of microcontroller circuit respectively with the input of control inputs circuit; The output of controllable silicon drive circuit is connected with SCR control end; The output of power circuit is connected with the power end of microcontroller circuit.
6. high-power passive type low-pass filter according to claim 2, is characterized in that: voltage zero-crossing detection circuit can detect the voltage over zero moment, does not produce shove when voltage over zero moment switching capacitance; When there is a large amount of harmonic wave in current supply circuit, may exist and cannot find the voltage real zero crossing moment, multiple zero crossing may be there is in circuit, now utilize current over-zero testing circuit, before switching, capacitor is full of electricity, adopt at voltage max moment switched capacitor, do not produce when current zero-crossing point moment switching capacitance and shove; Utilize voltage zero-crossing detection circuit and current over-zero testing circuit composite type switched capacitor, ensure that capacitor switching does not produce and shove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521013551.8U CN205178510U (en) | 2015-12-08 | 2015-12-08 | High-power passive low-pass filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521013551.8U CN205178510U (en) | 2015-12-08 | 2015-12-08 | High-power passive low-pass filtering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205178510U true CN205178510U (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521013551.8U Active CN205178510U (en) | 2015-12-08 | 2015-12-08 | High-power passive low-pass filtering device |
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| Country | Link |
|---|---|
| CN (1) | CN205178510U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856324A (en) * | 2015-12-08 | 2017-06-16 | 常州基腾电气有限公司 | High-power passive low-pass filtering device |
-
2015
- 2015-12-08 CN CN201521013551.8U patent/CN205178510U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856324A (en) * | 2015-12-08 | 2017-06-16 | 常州基腾电气有限公司 | High-power passive low-pass filtering device |
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