CN203747411U - Resonance elimination device with primary resonance elimination and secondary resonance elimination being combined - Google Patents
Resonance elimination device with primary resonance elimination and secondary resonance elimination being combined Download PDFInfo
- Publication number
- CN203747411U CN203747411U CN201420143199.9U CN201420143199U CN203747411U CN 203747411 U CN203747411 U CN 203747411U CN 201420143199 U CN201420143199 U CN 201420143199U CN 203747411 U CN203747411 U CN 203747411U
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- resonance
- harmonic elimination
- resonance elimination
- elimination
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- 238000003379 elimination reaction Methods 0.000 title claims abstract description 81
- 230000008030 elimination Effects 0.000 title claims abstract description 80
- 230000007935 neutral effect Effects 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 2
- 230000007774 longterm Effects 0.000 claims description 2
- 230000005622 photoelectricity Effects 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Abstract
The utility model discloses a resonance elimination device with primary resonance elimination and secondary resonance elimination being combined. In our country, electrical power systems mostly utilize a neutral point non-effective grounding mode, and the nonlinear resonance of the grounding mode is relatively common, so that the damage of electrical equipment and large-area power failure accidents are easy to occur. The resonance elimination device with the primary resonance elimination and the secondary resonance elimination being combined comprises a core control unit, a signal acquisition unit, a primary resonance elimination unit and a secondary resonance elimination unit. When resonance happens in a system, the core control unit firstly controls the secondary resonance elimination unit to work; after the resonance elimination action is finished, the core control unit scans the signal acquisition unit again to detect whether the resonance is completely eliminated; and if the resonance cannot be completely eliminated within a certain time, the primary resonance elimination unit is started, that is, a voltage limiter is put into use to eliminate the residual resonance energy. With the resonance elimination device with the primary resonance elimination and the secondary resonance elimination being combined, the reasonability, thoroughness and safety of the resonance elimination can be improved.
Description
Technical field
A kind of harmonic elimination apparatus of a secondary phase combination, the technology of the resonance that the neutral non-effective grounding mode in elimination electric power system that relates to produces, specifically in the situation that secondary harmonic elimination cannot thoroughly be eliminated resonance, carrying out a harmonic elimination one time, is two kinds of harmonic elimination apparatus that harmonic elimination mode complements one another again.
background technology
The electric power system of China adopts neutral non-effective grounding mode mostly, this earthing mode has higher power supply reliability, but nonlinear resonance is more common, not only amplitude is high for it, and energy is very large, and can spread all over whole electrical network, destructiveness is very large, once occur, often cause damage and the large-area power outage of electric equipment.
Eliminate at present the most frequently used method of resonance and mainly contain two kinds: the one, secondary harmonic elimination, it is short time short circuit voltage transformer secondary opening winding, by consuming resonant energy, thereby make the disappearance that decays gradually of resonance intensity, the method is simple, but be sometimes difficult to thoroughly eliminate resonance, if phylogenetic resonance is low-frequency resonant, harmonic elimination difficulty is larger, two is harmonic elimination resistance (linearity or nonlinear resistance) of connecting between over the ground at a neutral point of voltage transformer, object is to increase the reactance that zero sequence is returned, zero-sequence current is carried out to damping, although the method can be protected voltage transformer, but the certainty of measurement on voltage transformer has impact, when another External System generation single phase ground fault, resonance eliminator is due to self finite capacity, usually can occur self to burn fault, the resonance current particularly producing when system is when larger, on resonance eliminator, can produce very high voltage, the insulation of voltage transformer neutral point is formed and threatened.
Utility model content
The utility model is for the weak point existing in above-mentioned prior art, provides a kind of mode that harmonic elimination is combined with secondary harmonic elimination to eliminate the harmonic elimination apparatus of resonance, to improve reasonability, completeness and the fail safe of harmonic elimination.Its structural scheme is as follows:
A kind of harmonic elimination apparatus of a secondary phase combination.Comprise key control unit, signal gathering unit, harmonic elimination unit and secondary harmonic elimination unit, it is characterized in that: one end of signal gathering unit is connected with key control unit, the other end is directly connected on voltage transformer secondary side open delta place by wire, and key control unit is connected with the driver element of harmonic elimination and secondary harmonic elimination by photoelectricity barrier assembly.
(1) core that described key control unit is whole device, formed by single-chip microcomputer and Digital Logical Circuits, Main Function is that signal gathering unit is scanned, from signal gathering unit Real-time Obtaining open delta voltage signal and the running status of system is analyzed to judgement, drive harmonic elimination and the action of secondary harmonic elimination unit;
(2) a described harmonic elimination unit is composed in series by vacuum switch and voltage limiter, and voltage limiter is not long-term connecting system, but accesses between neutral point and ground by vacuum switch.The in the situation that of only cannot thoroughly eliminating resonance in described secondary harmonic elimination unit, just start vacuum switch and drop into voltage limiter.
(3)described secondary harmonic elimination unit forms with harmonic elimination resistance by controllable silicon is logical.Controllable silicon is in parallel with harmonic elimination resistance is connected to voltage transformer secondary side open delta place by wire, is state in parallel with signal gathering unit.In the time of system generation resonance, first key control unit controls the action of secondary harmonic elimination unit, completes after harmonic elimination action, and whether sweep signal collecting unit again, detect resonance and eliminate completely.If cannot eliminate within a certain period of time resonance completely, start harmonic elimination unit one time, drop into voltage limiter to eliminate remaining resonant energy.
The beneficial effects of the utility model:
Due to harmonic elimination process is divided into twice, the utility model combines the advantage of harmonic elimination and secondary harmonic elimination, overcome the deficiency of two kinds of harmonic elimination modes, both the sound resonance of having eliminated, ensure again the certainty of measurement of voltage transformer, and self burnout failure of having avoided resonance eliminator to occur due to self finite capacity.
Brief description of the drawings
Fig. 1 is the structural representation of the harmonic elimination apparatus of a secondary phase combination of the utility model.
In figure: 1, key control unit; 2, signal gathering unit; 3, a harmonic elimination unit; 4, secondary harmonic elimination unit, 5 vacuum contactors; 6, voltage limiter.
Embodiment
Referring to Fig. 1, the harmonic elimination apparatus of a secondary phase combination, comprises key control unit, signal gathering unit, harmonic elimination unit and secondary harmonic elimination unit.
Described key control unit is connected with signal gathering unit, is connected to voltage transformer secondary side open delta by signal gathering unit, Real-time Collection open delta voltage, and carry out AD conversion, and analyze judgement by described key control unit.
Described secondary harmonic elimination unit is connected directly to secondary side neutral point, and in the time of the raw resonance of systems approach, first described key control unit drives described secondary harmonic elimination unit action (short time is conducting controllable silicon repeatedly, short circuit voltage transformer secondary opening winding).After action certain time, decontrol controllable silicon, and voltage to neutral gathers judgement again, if resonance disappears not yet, is carrying out harmonic elimination one time.
A described harmonic elimination unit is composed in series by vacuum switch and voltage limiter, and upper end is connected to neutral point of voltage transformer, the direct ground connection in lower end.In the time that secondary harmonic elimination cannot be eliminated resonance thoroughly, described key control unit just drives described harmonic elimination unit action (closed vacuum contactor, drops into voltage limiter in the middle of electrical network) guarantee resonance thoroughly to eliminate.
Described key control unit is the core of whole device, the signal of on the one hand described signal gathering unit being sent here carries out analyzing and processing and judgement, also to drive in addition a described harmonic elimination unit and the action of described secondary harmonic elimination unit, the information such as the action situation of residual voltage, system running state and two harmonic elimination unit are carried out to record, and communication is to upper managing computer simultaneously.Key control unit is realized by Digital Logical Circuits and single-chip microcomputer.
Claims (1)
1. the harmonic elimination apparatus of secondary phase combination once, comprise key control unit, signal gathering unit, harmonic elimination unit and secondary harmonic elimination unit, it is characterized in that, one end of signal gathering unit is connected with key control unit, the other end is directly connected on voltage transformer secondary side open delta place by wire, and key control unit is connected with the driver element of harmonic elimination and secondary harmonic elimination by photoelectricity barrier assembly; Above-mentioned each unit also has following characteristics:
(1) core that described key control unit is whole device, formed by single-chip microcomputer and Digital Logical Circuits, Main Function is that signal gathering unit is scanned, from signal gathering unit Real-time Obtaining open delta voltage signal and the running status of system is analyzed to judgement, drive harmonic elimination and the action of secondary harmonic elimination unit;
(2) a described harmonic elimination unit is composed in series by vacuum switch and voltage limiter, and voltage limiter is not long-term connecting system, but accesses between neutral point and ground by vacuum switch; The in the situation that of only cannot thoroughly eliminating resonance in described secondary harmonic elimination unit, just start vacuum switch and drop into voltage limiter;
(3) described secondary harmonic elimination unit is made up of controllable silicon and harmonic elimination resistance, and controllable silicon is in parallel with harmonic elimination resistance is connected to voltage transformer secondary side open delta place by wire, is state in parallel with signal gathering unit; In the time of system generation resonance, first key control unit controls the action of secondary harmonic elimination unit, completes after harmonic elimination action, and whether sweep signal collecting unit again, detect resonance and eliminate completely; If cannot eliminate within a certain period of time resonance completely, start harmonic elimination unit one time, drop into voltage limiter to eliminate remaining resonant energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420143199.9U CN203747411U (en) | 2014-03-28 | 2014-03-28 | Resonance elimination device with primary resonance elimination and secondary resonance elimination being combined |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420143199.9U CN203747411U (en) | 2014-03-28 | 2014-03-28 | Resonance elimination device with primary resonance elimination and secondary resonance elimination being combined |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203747411U true CN203747411U (en) | 2014-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201420143199.9U Expired - Lifetime CN203747411U (en) | 2014-03-28 | 2014-03-28 | Resonance elimination device with primary resonance elimination and secondary resonance elimination being combined |
Country Status (1)
| Country | Link |
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| CN (1) | CN203747411U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855704A (en) * | 2014-03-28 | 2014-06-11 | 安徽巨森电器有限公司 | Primary and secondary combined resonance elimination device |
| CN103855704B (en) * | 2014-03-28 | 2016-11-30 | 安徽巨森电器有限公司 | The harmonic elimination apparatus that an a kind of secondary phase combines |
-
2014
- 2014-03-28 CN CN201420143199.9U patent/CN203747411U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855704A (en) * | 2014-03-28 | 2014-06-11 | 安徽巨森电器有限公司 | Primary and secondary combined resonance elimination device |
| CN103855704B (en) * | 2014-03-28 | 2016-11-30 | 安徽巨森电器有限公司 | The harmonic elimination apparatus that an a kind of secondary phase combines |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |