CN206004308U - Low-voltage dynamic reactive power compensation - Google Patents
Low-voltage dynamic reactive power compensation Download PDFInfo
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- CN206004308U CN206004308U CN201620610229.1U CN201620610229U CN206004308U CN 206004308 U CN206004308 U CN 206004308U CN 201620610229 U CN201620610229 U CN 201620610229U CN 206004308 U CN206004308 U CN 206004308U
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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
- Y02E40/30—Reactive power compensation
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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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Abstract
This utility model discloses a kind of low-voltage dynamic reactive power compensation.Described low-voltage dynamic reactive power compensation is connected on drive system rectification and becomes on secondary side low-voltage bus bar or distribution transformer secondary side low-voltage bus bar, and described low-voltage dynamic reactive power compensation forms by passive electric filter FC with the magnetically controlled saturated reactor MCR of parallel passive power filter device setting.In this utility model, MCR+FC type low pressure moves the passage that the wave filter mending in device has provided higher harmonic current in rectification change secondary side, thus decreasing the harmonic loss of rectifier transformer, reduces electric and magnetic oscillation and the noise of rectifier transformer.MCR is arranged on low-pressure side or the direct distribution low-voltage bus bar of rectifier transformer simultaneously, and running voltage is low, reduces cost, and control system is simple and reliable, improves stability and the reliability of device.
Description
Technical field
This utility model is related to that one kind is suitable for piezoelectric voltage waveform Severe distortion, voltage pulsation is big or load contains high order
The main mill drive system of the occasion of harmonic wave, such as rolled metal material factory and vertical shaft for mine hoist engine drive system or have
On the distribution transformer low-voltage bus bar of similar load character, carry out the device of harmonic and dynamic passive compensation.
Background technology
The industrial load of incoming transport electrical network (6kV, 10kV, 35kV electric pressure etc.), especially vertical shaft for mine hoist engine
Drive system and the rolling machine system of rolled metal material factory, its DC transmission device is commonly used 6 phases or 12 phase current transformers,
Actuating device current transformer can produce 6k ± 1 or 12k ± 1 subharmonic (k is positive integer) in the course of the work, electrical network is produced dirty
Dye.Because the voltage pulsation that reactive power impact when vertical shaft for mine hoist engine starts and during mill milling causes can affect other electricity consumptions
The normal work of equipment, voltage pulsation to be eliminated must compensate to reactive power.Meanwhile, current transformer low power factor needs
Compensating power.In order to solve the problems, such as harmonic pollution and the reactive power compensation of similar applications, domestic at present general employing
It is：
1st, Chinese patent description：The reactive power compensator of aontactless switch of CN99109784.X description, is TSR+
FC scheme.TSR is a special case of Controlled Reactor TCR, or IGCT is complete turning on, or contract fully.This device is by inductance
Certain harmonic filter, the switched inductors of IGCT inverse parallel composition of same size and the electronic control circuit constituting with electric capacity
Composition, wave filter and switched inductors are in parallel to access same bus.This patent is suitable for that piezoelectric voltage wave distortion is serious or load
Occasion containing abundant harmonic wave, can apply on 10kV or higher voltage level Grid.This patent can carry out having level quickly to compensate,
Improve power factor；The switched inductors (TSR) that IGCT inverse parallel is constituted, or IGCT is complete turn on, or contract fully.Electric current
Waveform is sine wave, and therefore, itself does not produce harmonic wave.Its shortcoming is when for 10kV and its above power system, due to
The limitation of IGCT itself, IGCT will be connected, once certain IGCT in IGCT string is breakdown, whole system voltages are just
It is added on other several IGCTs, cause other IGCTs to puncture and cause IGCT string to puncture.It is made up of IGCT inverse parallel
The reactive power that provides for system of switched inductors (TSR) be to have level adjustable.When load fluctuation is less, reactive power compensation is very
Hardly possible selects, and switched inductors can be caused to throw and owe benefit, excises and crosses the phenomenon generation mended again.Continuously adjustable nothing can not be provided for electrical network
Work(power.At present, this technical scheme is applied to cause this increase when 10kV and its above power system, and enforcement can cause one
Fixed difficulty.
2nd, Static Type Dynamic Reactive Compensation Device (SVC), i.e. TCR+FC scheme are installed.Metallurgical industry load is typically milling train
Or electric arc furnace, this nonlinear-load can produce in process of production substantial amounts of higher hamonic wave through bus, transformator flow into
Electrical network and load, cause harmonic wave public hazards.Chinese patent description：It is idle for compensating industrial load that CN02152793.8 describes
The method and apparatus of power consumption is exactly this scheme (SVC), and it includes compensating for the first set of controlled reactive power consumption
Device (TCR) and second set of compensation device (FC) for producing reactive power, two devices are all parallel to alternating current with load
On net (6kV～35kV bus).First set compensation device (TCR) is Controlled Reactor, is typically interconnected with delta connection phase
Connect, second set of compensation device is included for multiple wave filter parallel with one another.Control system is by voltage check device and electric current
Detection means and control device composition, control device sample rate current voltage signal, obtain after the reactive power being computed bus
Corresponding phase-shift control angle α is adjusting bus reactive power rate.This device energy quick regulation power system reactive power, improves power system
Static state and dynamic stability, improve voltage pulsation and voltage flicker.But this Static Type Dynamic Reactive Compensation Device is installed
(SVC) shortcoming is：Control system is complicated, and IGCT will be connected, once certain IGCT in IGCT string is breakdown, all
System voltage is added on other several IGCTs, causes other IGCTs to puncture and cause IGCT string to puncture, phased reactance
Device is a very big harmonic source in itself.In addition, it is expensive to install Static Type Dynamic Reactive Compensation Device (SVC).
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides that a kind of control system is simple and reliable, cost
Dynamic reactive compensation device low, that harmonic and fast reactive power back-off can be carried out.
For reaching above-mentioned purpose, low-voltage dynamic reactive power compensation of the present utility model, described low-voltage dynamic reactive power is mended
Repay device and be connected on drive system rectification and become on secondary side low-voltage bus bar or distribution transformer secondary side low-voltage bus bar, described low pressure
Dynamic reactive compensation device is made up of the passive electric filter FC being arranged in parallel and magnetically controlled saturated reactor MCR.
For reaching above-mentioned purpose, low-voltage dynamic reactive power compensation of the present utility model, described low-voltage dynamic reactive power is mended
Repay device to be connected on drive system rectification change secondary side low-voltage bus bar or distribution transformer secondary side low-voltage bus bar,
Described low-voltage dynamic reactive power compensation includes：
Passive electric filter FC, is connected to and is used for absorbing harmonics and reactive compensation on rectifier transformer secondary side；
Magnetically controlled saturated reactor MCR, is connected to rectifier transformer secondary side for quick absorbing reactive power；
Control system, for the voltage of rectifier transformer primary side voltage transformer summation current transformer, current signal,
And in rectifier transformer secondary side voltage transformer and magnetically controlled saturated reactor MCR device loop current transformer electricity
Pressure, current signal are sampled, and output control signal after being calculated and comparing, to adjust the angle of thyristor triggering impulse
Degree, changes the inductive reactive power that low-pressure side magnetically controlled saturated reactor absorbs.
Compared with prior art its advantageous effect is as follows for this utility model：
1st, it is mounted with passive electric filter (FC) due on rectifier transformer secondary side or direct distribution low-voltage bus bar,
Lagging reactive power needed for load can be made to become secondary side local compensation in rectification, that is, the lagging reactive power needed for load is not
Become by (or the overwhelming majority do not pass through) rectification, thus improving exerting oneself of rectification change.Meanwhile, higher hamonic wave can be made to inhale on the spot
Receive, a large amount of harmonic currents producing during the work of the nonlinear-load such as power electronic devices in actuating device avoid the need for by whole
Convertor transformer, because MCR+FC type low pressure is moved the wave filter mending in device and is provided higher hamonic wave electricity in rectification change secondary side
The passage of stream, thus decreasing the harmonic loss of rectifier transformer, reduces electric and magnetic oscillation and the noise of rectifier transformer.Change speech
It, low pressure is moved and is mended the burden significantly reducing rectification change, can extend the service life of rectification change.
2nd, MCR is arranged on low-pressure side or the direct distribution low-voltage bus bar of rectifier transformer, and running voltage is low, reduces into
This, control system is simple and reliable, improves stability and the reliability of device；Again because rectifier transformer is ready-made equipment,
Do not need in addition to install step-down transformer additional, be saved greatly cost of investment.
3rd, low pressure SVC device can be according to the inductive reactive power of the idle change quick regulation magnetically controlled saturated reactor of load
Output, to suppress rectification to become the voltage pulsation on secondary side or direct distribution low-voltage bus bar, thus the exerting oneself of stable power-driven machine.Low
Press benefit while solving the problems, such as that rectification becomes voltage pulsation on secondary side or direct distribution low-voltage bus bar, also solve in the lump
The voltage pulsation problem of high voltage bus.
Brief description
Fig. 1 is this utility model low-voltage dynamic reactive power compensation principle line chart；
It is idle that Fig. 2 is used for rolling mill drive system rectification change secondary side for this utility model low-voltage dynamic reactive power compensation
The block diagram form of the embodiment of power back-off harmonic filtering.
Specific embodiment
With reference to the accompanying drawings and detailed description this utility model is described in further detail：
Shown in Fig. 1, it is that this utility model low-voltage dynamic reactive power compensation includes passive electric filter FC, magnetic saturation
Controlled reactor MCR, wherein passive electric filter FC and magnetically controlled saturated reactor MCR are connected on rectifier transformer two respectively
Secondary side.
Fig. 2 gives this utility model low-voltage dynamic reactive power compensation and becomes secondary side for rolling mill drive system rectification
Reactive power compensation harmonic filtering embodiment, this device include one be socketed in drive system rectification become secondary side on be used for inhaling
Receive the passive electric filter (FC) of harmonics and reactive compensation, one is socketed in drive system rectification becomes secondary side for quick suction
Receive the magnetically controlled saturated reactor (MCR) of reactive power, and a set of control system 3.Control system collection is idle signals collecting, fortune
Calculate, adjust, and the function such as IGCT pulse-triggered and system protection is in one.Passive electric filter (FC) is fixing to be accessed
Low-voltage bus bar, the capacitive reactive power that it produces is relatively constant.When loading 4 reactive powers and changing, control system 3 is sampled rectification
Become the voltage of ZB primary side PT and CT, current signal, and rectification become the voltage of CT in ZB secondary side PT and MCR device loop,
Current signal, to calculate reactive power, compares to obtain control signal with the reactive power setting, and adjusts the angle of thyristor triggering impulse
Degree, changes the inductive reactive power that low-pressure side magnetically controlled saturated reactor (MCR) absorbs.Thus realizing described in the utility model quick
Dynamic compensation reactive power, the function of raising power factor harmonic filtering.
Low-voltage dynamic reactive power compensation of the present utility model is implemented：
It is connected on drive system rectification to become on secondary side for absorbing the passive electric filter of harmonics and reactive compensation
(FC) it is that characteristic harmonics and uncharacteristic harmonics number of times according to produced by load separately designs as certain subharmonic series resonant tank,
And form the impedance path to certain subharmonic, reach the purpose absorbing harmonic wave.The fairing of drive system typically 6 is mutually whole
Stream or equivalent 12 commutating phases, producing overtone order is that (6K ± 1) is secondary or secondary for (12K ± 1).Be commonly designed FC be divided into H5, H7 and
The filter branch such as H11.Reactive power compensation capacity is according to calculated load on low-voltage bus bar and to fully take into account harmonic compensation appearance
Measure and determine.
Access magnetically controlled saturated reactor (MCR) in the secondary side of rectifier transformer, can quickly dynamically continuously adjust no
Work(power.Its controlling angled a changes between 0 ° and 180 °, control system pass through gather rectification become primary side PT and CT voltage,
Current signal, is calculated this rectification and becomes total reactive power, be compared with the reactive power setting, when total idle work(is detected
(as capacitive Q when sending occurs in rateCWhen), now rolling mill is unloaded, and control system 3 sends instruction, reduces (0 °≤α of Trigger Angle α
≤ 180 °) to control MCR device to increase absorption lagging reactive power, balance each other with the capacitive reactive power of filter fixation.Work as inspection
When measuring total reactive power for inductive reactive power, now rolling mill work, control system 3 sends instruction, increases (0 ° of Trigger Angle α
≤ α≤180 °) to control MCR device to reduce absorption lagging reactive power, make the fixing capacitive reactive power of filter for compensating
Inductive reactive power required for load, suppresses voltage pulsation, finally makes power factor reach more than 0.95.
Therefore, compared to the prior art, simple system is reliable, and throws for this utility model low-voltage dynamic reactive power compensation
Money saves, and is particularly suitable for the main mill drive system of rolled metal material factory and vertical shaft for mine hoist engine drive system or has
Fast reactive power back-off, suppression voltage pulsation are used on the drive system direct distribution low-voltage bus bar of similar load character, enter
Row harmonic and raising power factor.
Claims (2)
1. a kind of low-voltage dynamic reactive power compensation, described low-voltage dynamic reactive power compensation is connected on drive system rectifier transformer
On device secondary side low-voltage bus bar or distribution transformer secondary side low-voltage bus bar it is characterised in that：Described low-voltage dynamic reactive power is mended
Repay device to be made up of the passive electric filter FC being arranged in parallel and magnetically controlled saturated reactor MCR.
2. a kind of low-voltage dynamic reactive power compensation, described low-voltage dynamic reactive power compensation is connected on drive system rectifier transformer
On device secondary side low-voltage bus bar or distribution transformer secondary side low-voltage bus bar it is characterised in that：
Described low-voltage dynamic reactive power compensation includes：
Passive electric filter FC, is connected to and is used for absorbing harmonics and reactive compensation on rectifier transformer secondary side；
Magnetically controlled saturated reactor MCR, is connected to rectifier transformer secondary side for quick absorbing reactive power；
Control system, for the voltage of rectifier transformer primary side voltage transformer summation current transformer, current signal, and
The voltage of current transformer, electricity in rectifier transformer secondary side voltage transformer and magnetically controlled saturated reactor MCR device loop
Stream signal is sampled, and after being calculated and being compared output control signal to magnetically controlled saturated reactor MCR to adjust brilliant lock
The angle of pipe trigger pulse, changes the inductive reactive power that low-pressure side magnetically controlled saturated reactor absorbs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620610229.1U CN206004308U (en) | 2016-06-20 | 2016-06-20 | Low-voltage dynamic reactive power compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620610229.1U CN206004308U (en) | 2016-06-20 | 2016-06-20 | Low-voltage dynamic reactive power compensation |
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| Publication Number | Publication Date |
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| CN206004308U true CN206004308U (en) | 2017-03-08 |
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| CN201620610229.1U Active CN206004308U (en) | 2016-06-20 | 2016-06-20 | Low-voltage dynamic reactive power compensation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767868A (en) * | 2018-06-14 | 2018-11-06 | 重庆明斯克电力建设工程有限责任公司 | Low-voltage circuit on-load voltage regulation compensation device |
| CN109286193A (en) * | 2018-11-01 | 2019-01-29 | 乌海市创新技术应用研究所 | A kind of electric arc furnace low-pressure reactive compensation and filter and its voltage control method |
-
2016
- 2016-06-20 CN CN201620610229.1U patent/CN206004308U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767868A (en) * | 2018-06-14 | 2018-11-06 | 重庆明斯克电力建设工程有限责任公司 | Low-voltage circuit on-load voltage regulation compensation device |
| CN109286193A (en) * | 2018-11-01 | 2019-01-29 | 乌海市创新技术应用研究所 | A kind of electric arc furnace low-pressure reactive compensation and filter and its voltage control method |
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