CN103855704B - The harmonic elimination apparatus that an a kind of secondary phase combines - Google Patents
The harmonic elimination apparatus that an a kind of secondary phase combines Download PDFInfo
- Publication number
- CN103855704B CN103855704B CN201410118885.5A CN201410118885A CN103855704B CN 103855704 B CN103855704 B CN 103855704B CN 201410118885 A CN201410118885 A CN 201410118885A CN 103855704 B CN103855704 B CN 103855704B
- Authority
- CN
- China
- Prior art keywords
- harmonic elimination
- unit
- resonance
- signal gathering
- key control
- 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 - Fee Related
Links
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 70
- 230000001264 neutralization Effects 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 230000001808 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000036469 Elimination phase Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
Abstract
The invention discloses the harmonic elimination apparatus that an a kind of secondary phase combines.The power system of China uses neutral non-effective grounding mode mostly, and the nonlinear resonance of this earthing mode is relatively common, easily causes the damage of electrical equipment and large-area power outage.This mode harmonic elimination combined with secondary harmonic elimination that the present invention provides carries out the device of harmonic elimination, including key control unit, signal gathering unit, a harmonic elimination unit and secondary harmonic elimination unit.When system generation resonance, first key control unit controls secondary harmonic elimination unit action, after completing harmonic elimination action, again scans signal gathering unit, and whether detection resonance is completely eliminated.If resonance cannot be completely eliminated within a certain period of time, start a harmonic elimination unit, i.e. put into voltage limiter to eliminate remaining resonant energy.This functional structure, can improve the reasonability of harmonic elimination, completeness and safety.
Description
Technical field
The harmonic elimination apparatus that an a kind of secondary phase combines, relates to eliminating the neutral non-effective grounding mode in power system
The technology of the resonance produced, specifically one the most once cannot disappear in the case of thoroughly eliminating resonance at secondary harmonic elimination
Humorous, it is the harmonic elimination apparatus that complements one another of two kinds of harmonic elimination modes.
Background technology
The power system of China uses neutral non-effective grounding mode mostly, and this earthing mode has higher power supply can
By property, but nonlinear resonance is relatively common, its not only amplitude high, and energy is very big, and can destroy throughout whole electrical network
Property very big, once occur, often result in the damage of electrical equipment and large-area power outage.
Eliminating resonance most common method at present mainly has two kinds: one to be secondary harmonic elimination, i.e. short time short circuit mutual induction of voltage
Device secondary opening winding, by consuming resonant energy, makes resonant intensity gradually decay thus disappears, and the method is simple, but sometimes
Time is difficult to thoroughly eliminate resonance, if phylogenetic resonance is low-frequency resonant, harmonic elimination difficulty is bigger；Two is that a harmonic elimination i.e. exists
Neutral point of voltage transformer over the ground between connect a resistance (linearly or nonlinearly resistance), it is therefore an objective to increase zero sequence and return
Reactance, zero-sequence current is damped, although the method can protect voltage transformer, but the measurement essence to voltage transformer
Degree has an impact, and during another External System generation singlephase earth fault, resonance eliminator, due to self finite capacity, usually can occur self to burn
Ruin fault, particularly when the resonance current that system produces is bigger, resonance eliminator can produce the highest voltage, to voltage transformer
The insulation of neutral point is formed and threatens.
Summary of the invention
The present invention is directed to weak point present in above-mentioned prior art, it is provided that a kind of by a harmonic elimination and secondary harmonic elimination phase
In conjunction with mode carry out eliminate resonance harmonic elimination apparatus, to improve the reasonability of harmonic elimination, completeness and safety.Its structure side
Case is as follows:
The harmonic elimination apparatus that an a kind of secondary phase combines.Including key control unit, signal gathering unit, a harmonic elimination list
Unit and secondary harmonic elimination unit, it is characterised in that: one end of signal gathering unit is connected with key control unit, and the other end is by wire
Directly being connected at voltage transformer secondary side open delta, key control unit passes through Phototube Coupling assembly and a harmonic elimination and two
The driver element of secondary harmonic elimination is connected.
(1) described key control unit is the core of whole device, is made up of single-chip microcomputer and Digital Logical Circuits, mainly makees
With being that signal gathering unit is scanned, obtain open delta voltage signal the fortune to system in real time from signal gathering unit
Row state is analyzed judging, drives a harmonic elimination and secondary harmonic elimination unit action；
(2) a described harmonic elimination unit is composed in series by vacuum switch and voltage limiter, the not long-term access system of voltage limiter,
But accessed between neutral point and ground by vacuum switch.The feelings of resonance only cannot be thoroughly eliminated at described secondary harmonic elimination unit
Under condition, just start vacuum switch and put into voltage limiter.
(3) described secondary harmonic elimination unit is by controllable silicon is logical and harmonic elimination resistance forms.Controllable silicon passes through with harmonic elimination resistor coupled in parallel
Wire is connected at voltage transformer secondary side open delta, is parallel connection with signal gathering unit.When system generation resonance,
First key control unit controls secondary harmonic elimination unit action, after completing harmonic elimination action, again scans signal gathering unit, inspection
Survey whether resonance is completely eliminated.If resonance cannot be completely eliminated within a certain period of time, start a harmonic elimination unit, i.e. put into
Voltage limiter is to eliminate remaining resonant energy.
Beneficial effects of the present invention:
Owing to harmonic elimination process is divided into twice, present invention incorporates a harmonic elimination and the advantage of secondary harmonic elimination, overcome two
The deficiency of kind of harmonic elimination mode, the most sound eliminates resonance, in turn ensure that the certainty of measurement of voltage transformer, and avoids
Self burnout failure that resonance eliminator occurs due to self finite capacity.
Accompanying drawing explanation
Fig. 1 is the structural representation of the harmonic elimination apparatus of a secondary phase combination
In figure: 1, key control unit；2, signal gathering unit；3, a harmonic elimination unit；4, secondary harmonic elimination unit, 5 true
Empty catalyst；6, voltage limiter.
Detailed description of the invention
See Fig. 1, the harmonic elimination apparatus of a secondary phase combination, including key control unit, signal gathering unit, once disappear
Humorous unit and secondary harmonic elimination unit.
Described key control unit is connected with signal gathering unit, is connected to voltage transformer by signal gathering unit
Secondary side open delta, Real-time Collection open delta voltage, and be AD converted, and be analyzed by described key control unit
Judge.
Described secondary harmonic elimination unit is connected directly to secondary side neutral point, and when the raw resonance of systems approach, described core controls
First unit drives described secondary harmonic elimination unit action, and (short time repeatedly turns on controllable silicon, short circuit voltage transformer secondary opening
Winding).After action certain time, decontrol controllable silicon, and voltage to neutral is acquired judging again, if resonance
Disappear not yet, then carrying out a harmonic elimination.
A described harmonic elimination unit is composed in series by vacuum switch and voltage limiter, upper end be connected to voltage transformer once in
Property point, lower end is directly grounded.When secondary harmonic elimination cannot eliminate resonance thoroughly, described key control unit just drives described one
Secondary harmonic elimination unit action (Guan Bi vacuum contactor, put in the middle of electrical network by voltage limiter) ensures that resonance thoroughly eliminates.
Described key control unit is the core of whole device, and the signal on the one hand sent described signal gathering unit here enters
Row analyzing and processing and judgement, the most also to drive a described harmonic elimination unit and described secondary harmonic elimination unit action, simultaneously by zero
The information such as the action situation of sequence voltage, system running state and two harmonic elimination unit carry out record, and communication is to upper managing computer
In.Key control unit is realized by Digital Logical Circuits and single-chip microcomputer.
Claims (1)
1. the harmonic elimination apparatus that once secondary phase combines, including key control unit, signal gathering unit, a harmonic elimination unit
And secondary harmonic elimination unit, it is characterised in that one end of signal gathering unit is connected with key control unit, and the other end is straight by wire
Being connected at voltage transformer secondary side open delta, key control unit is by Phototube Coupling assembly and a harmonic elimination and secondary
The driver element of harmonic elimination is connected；Above-mentioned each unit has also the feature that
(1) described key control unit is the core of whole device, is made up of single-chip microcomputer and Digital Logical Circuits, and Main Function is
Signal gathering unit is scanned, obtains open delta voltage signal the operation shape to system from signal gathering unit in real time
State is analyzed judging, drives a harmonic elimination and secondary harmonic elimination unit action；
(2) a described harmonic elimination unit is composed in series by vacuum switch and voltage limiter, the not long-term access system of voltage limiter, but
Accessed between neutral point and ground by vacuum switch；The situation of resonance only cannot be thoroughly eliminated at described secondary harmonic elimination unit
Under, just start vacuum switch and put into voltage limiter；
(3) described secondary harmonic elimination unit is made up of controllable silicon and harmonic elimination resistance, and controllable silicon is connect by wire with harmonic elimination resistor coupled in parallel
At voltage transformer secondary side open delta, it is parallel connection with signal gathering unit；When system generation resonance, core control
First unit processed controls secondary harmonic elimination unit action, after completing harmonic elimination action, again scans signal gathering unit, detects resonance
Whether it is completely eliminated；If resonance cannot be completely eliminated within a certain period of time, start a harmonic elimination unit, i.e. put into voltage limiter
To eliminate remaining resonant energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410118885.5A CN103855704B (en) | 2014-03-28 | The harmonic elimination apparatus that an a kind of secondary phase combines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410118885.5A CN103855704B (en) | 2014-03-28 | The harmonic elimination apparatus that an a kind of secondary phase combines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103855704A CN103855704A (en) | 2014-06-11 |
| CN103855704B true CN103855704B (en) | 2016-11-30 |
Family
ID=
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2847639Y (en) * | 2005-11-11 | 2006-12-13 | 李彦 | Arc extinction and resonance extinction protector in nuetral point non-effective earthing system |
| CN102623985A (en) * | 2012-01-17 | 2012-08-01 | 合肥凯高电气设备有限公司 | Novel comprehensive grounding protection and route selection device for medium-voltage power distribution system |
| CN203119619U (en) * | 2012-10-12 | 2013-08-07 | 姚如昕 | Microcomputer harmonic elimination device |
| CN203747411U (en) * | 2014-03-28 | 2014-07-30 | 安徽巨森电器有限公司 | Resonance elimination device with primary resonance elimination and secondary resonance elimination being combined |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2847639Y (en) * | 2005-11-11 | 2006-12-13 | 李彦 | Arc extinction and resonance extinction protector in nuetral point non-effective earthing system |
| CN102623985A (en) * | 2012-01-17 | 2012-08-01 | 合肥凯高电气设备有限公司 | Novel comprehensive grounding protection and route selection device for medium-voltage power distribution system |
| CN203119619U (en) * | 2012-10-12 | 2013-08-07 | 姚如昕 | Microcomputer harmonic elimination device |
| CN203747411U (en) * | 2014-03-28 | 2014-07-30 | 安徽巨森电器有限公司 | Resonance elimination device with primary resonance elimination and secondary resonance elimination being combined |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3137914B1 (en) | Smart sensor network for power grid health monitoring | |
| CN106463944A (en) | Method for detecting an open-phase condition of a transformer | |
| CN104977513A (en) | High-voltage cable outer sheath insulation state on-line monitoring system and control method thereof | |
| CN106249076A (en) | By the distribution transformer condition detection method under the influence of harmonic load and system | |
| CN106841883A (en) | Reactor method for monitoring operation states in high-voltage power capacitor complexes | |
| CN103712551A (en) | Power distribution network transformer low-voltage winding deformation on-line monitoring device and method | |
| CN103234576A (en) | State monitoring system for power devices in intelligent substations | |
| CN105841746A (en) | Multi-parameter fusion type on-line high-voltage high-capacity dry type reactor monitoring device | |
| CN106526383A (en) | Lightning arrester state monitoring system and lightning arrester state monitoring method | |
| CN106597147A (en) | State monitoring system and method of lightning arrester with series gap based on residual voltage monitoring | |
| CN103713244B (en) | A kind of live detection method for distribution cable shelf depreciation | |
| CN204256111U (en) | Partial discharge detecting system | |
| Cheng et al. | Proposed methodology for online frequency response analysis based on magnetic coupling to detect winding deformations in transformers | |
| CN203630283U (en) | Hand-held detection device used for cable insulation detection | |
| CN103855704B (en) | The harmonic elimination apparatus that an a kind of secondary phase combines | |
| CN203732677U (en) | Insulation state detection apparatus of all-insulation tubular busbar | |
| CN106405348A (en) | Electric cable insulation detection apparatus collection system | |
| CN106771639B (en) | High pressure pole tower ground resistance on-line monitoring system | |
| CN205785301U (en) | A kind of high-voltage large-capacity dry reactor on-Line Monitor Device of multi-parameter fusion | |
| CN106328361A (en) | Resonation elimination mechanism used in arc-resonation elimination device | |
| CN107064673A (en) | Electric arc detecting device and double-fed wind power generator electric brush slip ring protection system | |
| CN203396835U (en) | Monitoring and alarming system for grounding current of single-core cable | |
| CN203747411U (en) | Resonance elimination device with primary resonance elimination and secondary resonance elimination being combined | |
| CN203848796U (en) | On-line monitoring device of power distribution network transformer low-voltage winding deformation | |
| CN208000354U (en) | Twisted polyethylene cable protective grounding circulation detecting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20180328 |