CN102332722A - Matched filtering compensation energy-saving complete device for rectifying transformer - Google Patents
Matched filtering compensation energy-saving complete device for rectifying transformer Download PDFInfo
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- CN102332722A CN102332722A CN201110273408A CN201110273408A CN102332722A CN 102332722 A CN102332722 A CN 102332722A CN 201110273408 A CN201110273408 A CN 201110273408A CN 201110273408 A CN201110273408 A CN 201110273408A CN 102332722 A CN102332722 A CN 102332722A
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Abstract
The invention relates to a matched filtering compensation energy-saving complete device for a rectifying transformer, which comprises filter branches and a controller and is characterized in that the device is composed of 5 times, 7 times and 11 times three filter branches, wherein each of the filter branches comprises a thyristor valve set, a reactor, a spraying type fuse and a first capacitor which are in serial connection; a resistance-capacitance absorber is in parallel connection with two ends of the thyristor valve set; a discharging coil is in parallel connection between an input end of the spraying type fuse and an output end of the first capacitor; a grounded arrester is in parallel connection between the thyristor valve set and the reactor; the input end of each of the filter branches is respectively connected to a system bus; one end of the controller is electrically connected to the system bus; the other end of the controller is electrically connected to the thyristor valve set of each of the filter branches; and the resistance-capacitance absorber and the thyristor valve set are additionally arranged, thereby efficiently restraining impacts of overvoltage and large current in a loop during a capacitor set switching process and ensuring the reliable running of the system.
Description
Technical field
The invention belongs to filtering compensation device, be specifically related to a kind of rectification and become supporting filter compensation energy-saving the complete sets of equipment.
Background technology
Rectifier transformer is the power transformer of rectifying installation.The characteristics of rectifying installation are former side's input currents, and export direct current behind the secondary square tube over commutation original paper.Unsteady flow is the general name of rectification, adverse current and three kinds of working methods of frequency conversion, and rectification is wherein most widely used a kind of.The transformer of using as the rectifying device power supply is called rectifier transformer.Rectifier transformer is exactly a step-down transformer, uses the transistor rectification again after dropping to required voltage, and the principle of rectifier transformer and common transformer is identical.Transformer is the equipment of a kind of conversion alternating voltage of processing according to electromagnetic induction principle.Transformer generally has first line and secondary two mutual independent winding, the shared iron core of these two windings.The primary winding is connected AC power, in winding, flows through alternating current and produces magnetic potential, so alternating flux is just arranged in iron core-closed.Primary and secondary winding cutting magnetic line is at the secondary alternating current that just can induce same frequency.At the beginning of the transformer, the turn ratio of secondary winding equals voltage ratio.Elementary winding like a transformer is 440 circles, and secondary is 220 circles.Elementary input voltage is 220V, at the inferior output voltage that just can obtain 110V of transformer.The transformer that has can have a plurality of secondary winding and tap.So just a plurality of output voltages can have been obtained.Industrial rectification DC power supply major part is all obtained through rectifier transformer and rectifying installation by AC network.
Harmonic wave mainly is to be produced by the high-power converter that is called harmonic source (comprising chemical industry electrolytic rectifier equipment) and other nonlinear-load; The harmonic wave that harmonic source produces not only jeopardizes electrical network and other power consumer but also jeopardizes self, so the improvement of harmonic wave is very necessary and the real economy benefit is arranged.In China, most of aluminium electrolysis commutator system, especially thyristor rectifier system, from the needs of eliminating or reduce certain electric harmonic, often the AC side in system is equipped with corresponding electric harmonic filter; Make full use of the inactive power compensation of capacitor in the filter simultaneously, the power factor of the raising commutation system of using is to reach the purpose of optimizing the supply network parameter.Yet from the angle that the ascending, descending that the commutation system direct current is exported moves, what must conscientiously prove is when to throw, cut the harmonic filter group, can avoid system resonance, guarantees the stable operation of electric power networks, and makes the idle optimal compensation that obtains; Otherwise the building-out capacitor group will be operated in harmonic resonance or magnifying state, cause to make switch contact quicken to damage in the switch deciliter process easily, even will make the switch blast, thereby electrical network is impacted, and cause other beyond thought accident and take place.
Summary of the invention
Technical problem to be solved by this invention is: provide the rectification high, that can suppress loop overvoltage and heavy current impact of a kind of reliability to become supporting filter compensation energy-saving the complete sets of equipment.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of rectification becomes supporting filter compensation energy-saving the complete sets of equipment; Comprise filter branch and controller; It is characterized in that: this device is made up of 5 times, 7 times, 11 times three filter branch; Every filter branch forms by thyristor valve group, reactor, spray-by-type fuse and capacitor one series connection; Rc absorber of said thyristor valve group two ends parallel connections, the lightning arrester of a parallelly connected ground connection between discharge coil of parallel connection between the output of the input of said spray-by-type fuse and capacitor one, said thyristor valve group and reactor; The input of every filter branch thyristor valve group links to each other with system busbar respectively; One end of controller is electrically connected with system busbar, and the other end of controller is electrically connected with the thyristor valve group of every filter branch, and controller acquisition system bus three-phase current voltage signal is delivered to the thyristor valve group then and controlled.
Said rc absorber is in series by resistance and capacitor two.
Said thyristor valve group is made up of two thyristor inverse parallels.
Said controller adopts 32 ARM microprocessor chips.
Said capacitor one and capacitor two are selected the filtering capacitor of the full film medium of metal for use, and said reactor is a dry type iron core filter reactor.
Said spray is adopted vacuum circuit-breaker by the formula circuit breaker.
This discovery compared with prior art has following beneficial effect: the design principle of filter branch is that the impedance that utilizes condenser reactance device series arm to be directed against certain subharmonic is zero; This subharmonic is through capacity reactance branch road diversion electric power system; Make electric power system not receive the harm of this subharmonic, therefore 3 branch roads of the present invention are respectively three filter branch 5 times, 7 times, 11 times.After filtering compensation device put into operation, power factor (PF) reached more than 0.95, and the harmonic filtration rate is greater than 50%, and transformer utilization factor improves 30～40%, and promptly apparent power descends 30～40%; Not only purified electrical network, played energy-saving and cost-reducing effect simultaneously, added rc absorber and thyristor valve group, in capacitor group switching process, effectively suppressed loop overvoltage and heavy current impact like this, the system that guaranteed moves more reliably.
Description of drawings
Fig. 1 is a circuit diagram of the present invention.
Embodiment
Referring to Fig. 1; For making the present invention reasonable in design; Not only satisfied filtering requirements but also practice thrift investment as far as possible and reduce the wastage; Need to be grasped following three conditions: (1) system impedance (high-frequency resistance) and excursion thereof need the impedance frequency change curve of understanding system under various operational modes, perhaps the impedance frequency curve under the minimum operational mode during least favorable condition.(2) harmonic content of harmonic source generation is comprehensively confirmed according to measured data and experience, is at random owing to measure, and has dispersiveness and imperfection, according to actual conditions, considers that on the measured result basis certain surplus is as design parameter again.(3) harmonic limit standard is desired value to the restriction of harmonic wave with the existing related standards of China.Standard of the present invention is a little more than national standard, mainly is to consider that load develops possibly and leaves suitable nargin.This device need be in filtering harmonic; Reactive power compensation is provided; Be that this device has filtering and compensation double action, confirm certain capacitance according to the reactive power compensation needs when confirming this installed capacity, after total compensation capacity of this device is confirmed; According to the basic equal principle of branch road harmonic voltage, confirm each branch road capacity of low pass filter and high pass filter capacity.For N single tuning filter, under certain condition, parallelly connected or series resonance possibly take place with system in the single tuning filter; Overcurrent that takes place during resonance and overvoltage will increase loss, and damage equipment endangers very serious; Therefore; Must avoid monotony humorous filter and system's generation resonance phenomena, the installing of filter need confirm that every cover filter is installed 5,7,11 single-pass filter branch according to harmonic number and conditions such as harmonic current value and reactive power equilibrium that rectifying device produces; The design principle of filter branch is that the impedance that utilizes condenser reactance device series arm to be directed against certain subharmonic is zero; This subharmonic makes electric power system not receive the harm of this subharmonic through capacity reactance branch road diversion electric power system, and design is as follows particularly:
Referring to Fig. 1; The present invention includes filter branch and controller, this device is made up of 3 filter branch, promptly corresponding 5,7,11 single-pass filter branch; Every filter branch is in series by thyristor valve group 1, reactor 2, spray-by-type fuse 3 and capacitor 1; Rc absorber 5 of thyristor valve group 1 two ends parallel connection, rc absorber 5 is in series by resistance 9 and capacitor 2 10, discharge coil 6 of parallel connection between the output of the input of spray-by-type fuse 3 and capacitor 1; The lightning arrester 7 of a parallelly connected ground connection between thyristor valve group 1 and the reactor 2; The input of every filter branch thyristor valve group 1 links to each other with system busbar 8 respectively, and an end of controller is electrically connected with system busbar 8, and the other end of controller is electrically connected with the thyristor valve group 1 of every filter branch; Controller acquisition system bus 8 three-phase current voltage signals are delivered to thyristor valve group 1 then and are controlled, and spray is adopted vacuum circuit-breaker by formula circuit breaker 3.
Acting as of lightning arrester 7 prevents operation and Lightning Over-voltage, and capacitor is selected the filtering capacitor of the full film medium of metal for use; Capacitor 1 and capacitor 2 10 are selected the filtering capacitor of the full film medium of metal for use; Be AFM type filtering capacitor, adopt metalized film, the built-in explosion-protection equipment of the insulating oil of vacuum impregnation high-quality; Safe and reliable, current overload ability >=1.5In.Capacitor long-time running under 1.1 times rated voltage, capacitor long-time running under 1.3 times rated current.Series reactor 2 is a dry type iron core filter reactor, specifically can adopt tri-phase iron core filter reactor (LKSG type), does not produce electromagnetic interference, and the linearity is 1.8In, the three-phase electricity sensibility reciprocal degree of balance≤2%.
Thyristor valve group 1 is a fling-cut switch, and thyristor valve group 1 is made up of two thyristor inverse parallels, and thyristor adopts the IXYS element of Germany, and thyristor has the advantage of operating passing zero non-transient process, and advanced technology, perfect in shape and function, reliability is high, maintenance is little; The thyristor switchable capacitor group has no inrush phenomenon and impacts no arc reignition, no switching overvoltage; The thyristor switchable capacitor group has the idle variation of quick tracking, frequent switching, and rapid dynamic response speed, the response time is less than 20ms.
Thyristor valve group 1 is electrically connected with controller, and the other end of controller is electrically connected with system busbar 8 sides, controller control thyristor valve group 1; Controller adopts 32 ARM microprocessor chips; Its structure of controller mainly comprises: power circuit, display circuit, key circuit, special-purpose electrical measurement circuit, sample circuit and CPU, and the CPU of concrete controller adopts 32 ARM microprocessor chips, multi-task operating system kernel, by each other circuit supplies of power circuit phase; Electrical measurement circuit and sample circuit and CPU join; Sample circuit is used to gather the current and voltage signals of step-down side, and sends conversion of signals to the electrical measurement circuit, and the signal that the electrical measurement circuit is sent sample circuit here is handled; Carry out the transmitted in both directions that signal is accomplished in communication with CPU; The cpu monitor operating state, with the signal that the electrical measurement circuit is sent here analyze, logic determines, calculating, with the operating state of control device.The electrical measurement circuit adopts the special-purpose electric energy measure chip of the ADE7758 model of U.S. ANOLOG DEVICE company production.Controller, multiple functional easy to operate, autoalarm is arranged, each item defencive functions such as overvoltage, overcurrent, ultraharmonics are arranged, guarantee that the product all operations uses monitoring controlling in-house operation.Operation of equipment is convenient, and safe and reliable, specifically, controller can be selected some general purpose controllers on the market for use, such as: the controller of the JKGF series that s7-200 Programmable Logic Controller that Siemens Company produces or Hua Guan company produce.
Beneficial effect of the present invention:
1) adopts the thuristor throw-in and throw-off switch among the present invention; With harmonic current and the power factor change of controller,, realized fast automatic filtering compensation from the quick switching of motion tracking by load; Guarantee stable and reliable operation; The physical quantity of control: harmonic current and power factor have the automatic/hand handoff functionality, defencive function: overcurrent, over-voltage protecting function.
2) the present invention is at rc absorber 5 of thyristor valve group 1 parallel connection; The withstand voltage of original thyristor valve group is 10KV; Possibility of damaging when so the thyristor valve group exists certain voltage excessive; And the effect of rc absorber 5 parallel connections is the effects that voltage played buffering, promptly in capacitor group switching process, has effectively suppressed loop overvoltage and heavy current impact, and the system that guaranteed moves more reliably.
Claims (6)
1. a rectification becomes supporting filter compensation energy-saving the complete sets of equipment; Comprise filter branch and controller; It is characterized in that: this device is made up of 5 times, 7 times, 11 times three filter branch; Every filter branch is in series by thyristor valve group (1), reactor (2), spray-by-type fuse (3) and capacitor one (4); Said thyristor valve group (a 1) two ends parallel connection rc absorber (5); A parallel connection power coil (6) between the output of the input of said spray-by-type fuse (3) and capacitor one (4); The lightning arrester (7) of a parallelly connected ground connection between said thyristor valve group (1) and the reactor (2), the input of every filter branch thyristor valve group (1) links to each other with system busbar (8) respectively, and an end of controller is electrically connected with system busbar (8); The other end of controller is electrically connected with the thyristor valve group (1) of every filter branch, and controller acquisition system bus (8) three-phase current voltage signal is delivered to thyristor valve group (1) then and controlled.
2. a kind of rectification according to claim 1 becomes supporting filter compensation energy-saving the complete sets of equipment, it is characterized in that: said rc absorber (5) is in series by resistance (9) and capacitor two (10).
3. a kind of rectification according to claim 1 and 2 becomes supporting filter compensation energy-saving the complete sets of equipment, it is characterized in that: said thyristor valve group (1) is made up of two thyristor inverse parallels.
4. a kind of rectification according to claim 1 and 2 becomes supporting filter compensation energy-saving the complete sets of equipment, it is characterized in that: said controller adopts 32 ARM microprocessor chips.
5. a kind of rectification according to claim 1 and 2 becomes supporting filter compensation energy-saving the complete sets of equipment; It is characterized in that: said capacitor one (4) and capacitor two (10) are selected the filtering capacitor of the full film medium of metal for use, and said reactor (2) is a dry type iron core filter reactor.
6. a kind of rectification according to claim 1 and 2 becomes supporting filter compensation energy-saving the complete sets of equipment, it is characterized in that: said spray is adopted vacuum circuit-breaker by formula circuit breaker (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110273408A CN102332722A (en) | 2011-09-15 | 2011-09-15 | Matched filtering compensation energy-saving complete device for rectifying transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110273408A CN102332722A (en) | 2011-09-15 | 2011-09-15 | Matched filtering compensation energy-saving complete device for rectifying transformer |
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| CN102332722A true CN102332722A (en) | 2012-01-25 |
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| CN201110273408A Pending CN102332722A (en) | 2011-09-15 | 2011-09-15 | Matched filtering compensation energy-saving complete device for rectifying transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242457A (en) * | 2014-09-26 | 2014-12-24 | 山东金美亚电力科技有限公司 | Intelligent power-saving comprehensive control set |
| CN108845238A (en) * | 2018-07-26 | 2018-11-20 | 大力电工襄阳股份有限公司 | High-pressure thyristor on-Line Monitor Device and multiple groups high-pressure thyristor monitoring device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201829951U (en) * | 2010-10-16 | 2011-05-11 | 国网南自控股（杭州）有限公司 | Complete equipment dedicated to single crystal furnace filtering compensation |
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2011
- 2011-09-15 CN CN201110273408A patent/CN102332722A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201829951U (en) * | 2010-10-16 | 2011-05-11 | 国网南自控股（杭州）有限公司 | Complete equipment dedicated to single crystal furnace filtering compensation |
Non-Patent Citations (2)
| Title |
|---|
| G. N. REVANKAR等: "Turnoff model of an SCR", 《IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS AND CONTROL INSTRUMENTATION》 * |
| 蓝元良等: "串联晶闸管反向恢复暂态过程的研究", 《电网技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242457A (en) * | 2014-09-26 | 2014-12-24 | 山东金美亚电力科技有限公司 | Intelligent power-saving comprehensive control set |
| CN108845238A (en) * | 2018-07-26 | 2018-11-20 | 大力电工襄阳股份有限公司 | High-pressure thyristor on-Line Monitor Device and multiple groups high-pressure thyristor monitoring device |
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Application publication date: 20120125 |