CN108847668A - A kind of harmonic wave active filter circuit inhibiting factory 400V distribution system - Google Patents
A kind of harmonic wave active filter circuit inhibiting factory 400V distribution system Download PDFInfo
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- CN108847668A CN108847668A CN201810707411.2A CN201810707411A CN108847668A CN 108847668 A CN108847668 A CN 108847668A CN 201810707411 A CN201810707411 A CN 201810707411A CN 108847668 A CN108847668 A CN 108847668A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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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
The present invention provides a kind of harmonic wave active filter circuits for inhibiting factory 400V distribution system；Including soft-start circuit, filter circuit, inverter circuit, the soft-start circuit is connect with the A phase, B phase, C phase of three phase mains respectively, the soft-start circuit rear end is connect with filter circuit, the neutral line electrode N connection of the cathode and three phase mains of filter circuit, the inverter circuit is in parallel with filter circuit by reactor, and the inverter circuit rear end is connect after connecting with accumulator with the neutral line electrode N of power supply.The present invention can compensate each harmonic, can inhibit flickering, and compensating reactive power has the characteristics of one-machine-multi-function, relatively reasonable in cost performance；Filtering characteristic is not influenced by system impedance etc., can eliminate the danger that resonance occurs with system impedance；With adaptation function, can the harmonic wave that varies of automatic tracking and compensating, that is, have the characteristics that high controllability and fast-response.
Description
Technical field
The present invention relates to a kind of harmonic wave active filter circuits for inhibiting factory 400V distribution system.
Background technique
It is extensive due to high power semi-conductor converter and electronic voltage regulator in modern enterprise factory distribution system
Using, for example frequency converter, central air-conditioning etc., these nonlinear loads bring non-sinusoidal current to electric system, cause a large amount of
The injection of electric harmonic causes power system power supply quality to decline, and harmonic pollution is serious in low voltage electric network, increases electric energy damage
Consumption, while causing very big security risk.Following aspect is mainly manifested in enterprise's current power problem：1, harmonic current is superimposed
On the fundamental wave of capacitor, resonance is generated, condenser current can be made to become larger, temperature increases, the lost of life, influences normal safety and uses
Electricity, if the long-term impacting electric capacity of harmonic current, is likely to result in capacitor box and burns, even more serious Electrical Safety accident； 2,
Distortion power causes the copper loss of transformer, iron loss to increase, and reduces transformer and uses capacity；3, transformer overheats, and generates larger
Noise can reduce the service life of transformer for a long time by the impact of harmonic current, may result in transformer damage when serious
It is bad；Line loss is increased, electric energy loss is increased, power-efficient is reduced, overheats cable, easily cause the hidden danger such as short circuit, fire；Shadow
The efficiency and normal operation of other electrical equipments are rung, vibration and noise are generated, shortens equipment life.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of harmonic wave active power filterings for inhibiting factory 400V distribution system
Circuit.
The present invention is achieved by the following technical programs.
A kind of harmonic wave active filter circuit inhibiting factory 400V distribution system provided by the invention；Including delay startup electricity
Road, filter circuit, inverter circuit, the soft-start circuit are connect with the A phase, B phase, C phase of three phase mains respectively, the delay startup
Circuit rear end is connect with filter circuit, and the neutral line electrode N connection of the cathode and three phase mains of filter circuit, the inverter circuit passes through
Reactor is in parallel with filter circuit, and the inverter circuit rear end is connect after connecting with accumulator with the neutral line electrode N of power supply.
The soft-start circuit includes resistance R6, resistance R7, resistance R8 and contactor KM1 and contactor KM2, the resistance
After R6, resistance R7, resistance R8 are connected to three phase mains A phase fuse FU1, B phase fuse FU2, C phase fuse FU3
End, the resistance R6, resistance R7, resistance R8 are respectively connect with three contacts of contactor KM2 source side, the resistance R6,
Resistance R7, resistance R8 front end connect connection with three contacts of contactor KM1 source side respectively, the contactor KM2's
Three contacts of load-side are connect with three contacts of load-side of contactor KM1.
The filter circuit includes the reactance L4 being connected on three contacts of contactor KM2 load-side, reactance
L5, reactance L6, the reactance L4, reactance L5, the rear end reactance L6 are connect with resistance R7, resistance R8, resistance R9 respectively, resistance
R7, resistance R8, resistance R9 the other end connect respectively with capacitor C3, capacitor C4, capacitor C5, capacitor C3, capacitor C4, capacitor C5
The other end be connected on three contacts of contactor KM3 source side, three contacts difference of the load-side of contactor KM3
It is connect with three contacts of relay FR1, the neutral line electrode N of two one end access power supply of relay FR1.
The inverter circuit includes switching device Q1, switching device Q2, switching device Q3, switching device Q4, switching device
Q5, switching device Q6, the emitter of the switching device Q1 connect jointly with reactance L1 with the collector of switching device Q2 after with
Resistance R9 is in parallel, the emitter of the switching device Q3 connect jointly with reactance L2 with the collector of switching device Q4 after with resistance
R8 is in parallel, the emitter of the switching device Q5 connect jointly with reactance L3 with the collector of switching device Q6 after with resistance R7
Parallel connection, the collector of the switching device Q1 and the emitter of switching device Q2 are connect with the both ends of capacitor C6 respectively, described to open
The emitter of the collector and switching device Q4 that close device Q3 is connect with the both ends of capacitor C7 respectively, the collection of the switching device Q5
The emitter of electrode and switching device Q6 are connect with the both ends of capacitor C8 respectively, the switching device Q1, switching device Q2, are opened
It closes and is respectively connected with diode between the emitter and collector of device Q3, switching device Q4, switching device Q5, switching device Q6.
The storage capacitor is capacitor C1, and capacitor C1 is in parallel with capacitor C8 and one end of capacitor C1 and the neutral line electrode N of power supply
Connection, the both ends of the capacitor C1 are also connect with the both ends after R1 and R2 series connection.
The switching device Q1, switching device Q2, switching device Q3, switching device Q4, switching device Q5, switching device Q6
It is insulated gate bipolar transistor.
The beneficial effects of the present invention are：
1) each harmonic can be compensated, can inhibit flickering, compensating reactive power has the characteristics of one-machine-multi-function, in cost performance more
Rationally；
2) filtering characteristic is not influenced by system impedance etc., can eliminate the danger that resonance occurs with system impedance；
3) there is adaptation function, can the harmonic wave that varies of automatic tracking and compensating, that is, there is high controllability and quickly ring
The features such as answering property.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is circuit diagram of the invention.
Specific embodiment
Be described further below technical solution of the present invention, but claimed range be not limited to it is described.
A kind of harmonic wave active filter circuit inhibiting factory 400V distribution system；Including soft-start circuit, filter circuit, inverse
Power transformation road, the soft-start circuit are connected with the A phase of three phase mains, B phase, C respectively, the soft-start circuit rear end and filter
Wave circuit connection, the neutral line electrode N connection of the cathode and three phase mains of filter circuit, the inverter circuit pass through reactor and filtering
Circuit in parallel, the inverter circuit rear end are connect after connecting with accumulator with the neutral line electrode N of power supply.
The soft-start circuit includes resistance R6, resistance R7, resistance R8 and contactor KM1 and contactor KM2, the resistance
After R6, resistance R7, resistance R8 are connected to three phase mains A phase fuse FU1, B phase fuse FU2, C phase fuse FU3
End, the resistance R6, resistance R7, resistance R8 are respectively connect with three contacts of contactor KM2 source side, the resistance R6,
Resistance R7, resistance R8 front end connect connection with three contacts of contactor KM1 source side respectively, the contactor KM2's
Three contacts of load-side are connect with three contacts of load-side of contactor KM1.The circuit control direct current capacitors group can when charging
The dash current that can cause can start active filter when DC capacitor voltage reaches internal control circuit critical value
Do harmonic current compensation.Main composition has：Current-limiting resistance, contactor.The setting of current-limiting resistance causes through energy converter
The dash current for flowing into direct current capacitors is limited in a degree of, and when circuit to be controlled assigns enabled instruction, electromagnetism is opened
It closes and merges bypass current-limiting resistance, so that energy converter is really connect with electric system.
The filter circuit includes the reactance L4 being connected on three contacts of contactor KM2 load-side, reactance
L5, reactance L6, the reactance L4, reactance L5, the rear end reactance L6 are connect with resistance R7, resistance R8, resistance R9 respectively, resistance
R7, resistance R8, resistance R9 the other end respectively connect with capacitor C3, capacitor C4, capacitor C5, capacitor C3, capacitor C4, capacitor C5
The other end is connected on three contacts of contactor KM3 source side, three contacts of load-side of contactor KM3 respectively with after
Three contacts of electric appliance FR1 connect, the neutral line electrode N of two one end access power supply of relay FR1.The circuit passes through series parallel resonance
Filter, over-current protection relay, abnormal escape control device are realized and absorb high-frequency harmonic electric current.
The inverter circuit includes switching device Q1, switching device Q2, switching device Q3, switching device Q4, switching device
Q5, switching device Q6, the emitter of the switching device Q1 connect jointly with reactance L1 with the collector of switching device Q2 after with
Resistance R9 is in parallel, the emitter of the switching device Q3 connect jointly with reactance L2 with the collector of switching device Q4 after with resistance
R8 is in parallel, the emitter of the switching device Q5 connect jointly with reactance L3 with the collector of switching device Q6 after with resistance R7
Parallel connection, the collector of the switching device Q1 and the emitter of switching device Q2 are connect with the both ends of capacitor C6 respectively, described to open
The emitter of the collector and switching device Q4 that close device Q3 is connect with the both ends of capacitor C7 respectively, the collection of the switching device Q5
The emitter of electrode and switching device Q6 are connect with the both ends of capacitor C8 respectively, the switching device Q1, switching device Q2, are opened
It closes and is respectively connected with diode between the emitter and collector of device Q3, switching device Q4, switching device Q5, switching device Q6.
Energy provided by electric system is converted into harmonic compensation current source by inverter circuit, is fed back in electric system, and reduction is reached
The function of harmonic wave.
The accumulator includes capacitor C1, and capacitor C1 is in parallel with capacitor C8 and one end of capacitor C1 and the neutral line electrode of power supply
N connection, the both ends of the capacitor C1 are also connect with the both ends after R1 and R2 series connection.Energy from electric system is penetrated into electric energy
The control of converter and stored, by the more equal direct current capacitors of capacitance and connect.Energy converter work
When other than exporting the harmonic current to be compensated, also establish steady dc voltage in direct current capacitors group.
The switching device Q1, switching device Q2, switching device Q3, switching device Q4, switching device Q5, switching device Q6
It is insulated gate bipolar transistor.
The principle of the present invention is：After breaker closing, carried out first by capacitor of the pre-charge resistance to DC bus
Current-limiting charge, this process can continue several seconds, be the moment impact after preventing from powering on to DC bus capacitance.When bus electricity
After pressure Udc reaches predetermined value, precharge terminates, main contactor closure.DC capacitor is as energy-storage travelling wave tube, to pass through IGBT inversion
Device and internal reactor export compensation electric current outward and provide energy.Current signal is acquired in real time by external CT to send to signal processing
Then circuit send FPGA to controller again, controller separates fundamental wave component, and extracts all harmonic waves；Controller can incite somebody to action
Collected harmonic components and the issued compensation electric current of Dow relatively obtain difference as real-time compensation signal and are output to driving
Compensation harmonic electric current is injected into power grid by circuit, triggering IGBT converter, realizes the function of filtering out harmonic wave.
Example 1:Phosphatization fertilizer Co., Ltd is opened to Kweiyang, the active power filtering that switchgear house 1# incoming power installs 100A additional is newly concentrated
Device
1) measurement data before newly concentration switchgear house is administered
It can be seen that from above-mentioned tables of data result, power factor 0.86, power factor is lower than 0.90 requirement.Electric current is abnormal
Variability reaches 11.26% or so, have exceeded national power quality standard it is permitted≤5%, peak time-harmonic wave current magnitude meeting
It is bigger, it will affect the normal operation of electrical equipment, or even generate safety accident, harmonic current is to accelerate cable aging, shortens and becomes
One of the basic reason of the major reason of depressor service life and common capacitor box compensating electric capacity scaling loss, will increase simultaneously
The loss of cable, transformer.
2) measurement data after newly concentration switchgear house is administered
By after newly concentration switchgear house 1# incoming power installs the active filter of 100A additional.Power factor is 0.91,
Power factor is higher than 0.90 requirement.Current distortion rate is down to 2.97% or so, and load country power quality standard is permitted
≤ 5%, the effective damage for inhibiting harmonic wave distribution equipment.
Example 2:The active filter that 1 section of inlet wire of the old villiaumite switchgear house of phosphatization fertilizer Co., Ltd installs 150A additional is opened to Kweiyang
1) measurement data before 1 section of inlet wire of old villiaumite switchgear house is administered
General 150A of harmonic current or so it can be seen from upper test result, reactive power 101.6kvar in total, power
Factor is 0.88.Lower than the requirement that power factor is more than or equal to 0.90.Current distortion rate reaches 51.10% or so, far beyond
National power quality standard is permitted≤and 5%, peak time-harmonic wave current magnitude can be bigger, will affect the normal fortune of electrical equipment
Row, or even safety accident is generated, harmonic current is to accelerate cable aging, shorten the major reason of transformer service life, and
One of the basic reason of common capacitor box compensating electric capacity scaling loss, while will increase the loss of cable, transformer.So suggesting to the greatest extent
The fast active filter that installs additional carries out harmonic wave control.
2) measurement data after switchgear house is administered newly is concentrated in old villiaumite switchgear house
By after the active filter that old villiaumite switchgear house 1# incoming power installs 150A additional.Power factor is 0.95,
Power factor is higher than 0.90 requirement.Current distortion rate is down to 3.98% or so, and load country power quality standard is permitted
≤ 5%, the effective damage for inhibiting harmonic wave distribution equipment.
Claims (6)
1. a kind of harmonic wave active filter circuit for inhibiting factory 400V distribution system, it is characterised in that：Including soft-start circuit, filter
Wave circuit, inverter circuit, the soft-start circuit are connect with the A phase, B phase, C phase of three phase mains respectively, the soft-start circuit
Rear end is connect with filter circuit, and the neutral line electrode N connection of the cathode and three phase mains of filter circuit, the inverter circuit passes through reactance
Device is in parallel with filter circuit, and the inverter circuit rear end is connect after connecting with accumulator with the neutral line electrode N of power supply.
2. inhibiting the harmonic wave active filter circuit of factory 400V distribution system as described in claim 1, it is characterised in that：It is described
Soft-start circuit includes resistance R6, resistance R7, resistance R8 and contactor KM1 and contactor KM2, the resistance R6, resistance R7, electricity
Resistance R8 is connected to the rear end of three phase mains A phase fuse FU1, B phase fuse FU2, C phase fuse FU3, the resistance
R6, resistance R7, resistance R8 are respectively connect with three contacts of contactor KM2 source side, the resistance R6, resistance R7, resistance
The front end of R8 connect connection, load-side three touchings of the contactor KM2 with three contacts of contactor KM1 source side respectively
Point is connect with three contacts of load-side of contactor KM1.
3. inhibiting the harmonic wave active filter circuit of factory 400V distribution system as described in claim 1, it is characterised in that：It is described
Filter circuit includes the reactance L4, reactance L5, reactance L6 being connected on three contacts of contactor KM2 load-side, institute
State reactance L4, reactance L5, the rear end reactance L6 are connect with resistance R7, resistance R8, resistance R9 respectively, resistance R7, resistance R8, electricity
Resistance R9 the other end connect respectively with capacitor C3, capacitor C4, capacitor C5, capacitor C3, capacitor C4, capacitor C5 the other end connect respectively
Connect on three contacts of contactor KM3 source side, three contacts of load-side of contactor KM3 respectively with relay FR1 three
A contact connection, the neutral line electrode N of two one end access power supply of relay FR1.
4. inhibiting the harmonic wave active filter circuit of factory 400V distribution system as described in claim 1, it is characterised in that：It is described
Inverter circuit includes switching device Q1, switching device Q2, switching device Q3, switching device Q4, switching device Q5, switching device
Q6, the emitter of the switching device Q1 is in parallel with resistance R9 after connecting jointly with reactance L1 with the collector of switching device Q2,
The emitter of the switching device Q3 is in parallel with resistance R8 after connecting jointly with reactance L2 with the collector of switching device Q4, described
The emitter of switching device Q5 is in parallel with resistance R7 after connecting jointly with reactance L3 with the collector of switching device Q6, the switch
The collector of device Q1 and the emitter of switching device Q2 are connect with the both ends of capacitor C6 respectively, the current collection of the switching device Q3
The emitter of pole and switching device Q4 are connect with the both ends of capacitor C7 respectively, the collector and switching device of the switching device Q5
The emitter of Q6 is connect with the both ends of capacitor C8 respectively, the switching device Q1, switching device Q2, switching device Q3, derailing switch
Part Q4, switching device Q5, switching device Q6 emitter and collector between be respectively connected with diode.
5. inhibiting the harmonic wave active filter circuit of factory 400V distribution system as described in claim 1, it is characterised in that：It is described
Accumulator includes that capacitor C1, capacitor C1 and capacitor C8 are in parallel and one end of capacitor C1 and the neutral line electrode N of power supply are connect, the electricity
The both ends for holding C1 are also connect with the both ends after R1 and R2 series connection.
6. inhibiting the harmonic wave active filter circuit of factory 400V distribution system as described in claim 1, it is characterised in that：It is described
Switching device Q1, switching device Q2, switching device Q3, switching device Q4, switching device Q5, switching device Q6 are that insulated gate is double
Bipolar transistor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810707411.2A CN108847668A (en) | 2018-07-02 | 2018-07-02 | A kind of harmonic wave active filter circuit inhibiting factory 400V distribution system |
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| CN201810707411.2A CN108847668A (en) | 2018-07-02 | 2018-07-02 | A kind of harmonic wave active filter circuit inhibiting factory 400V distribution system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111310246A (en) * | 2020-03-23 | 2020-06-19 | 能科科技股份有限公司 | Safety protection system of high-voltage dynamic reactive power compensation device |
| CN111668841A (en) * | 2020-06-28 | 2020-09-15 | 上海兆铄科技有限公司 | Pre-charging resistor and damping resistor integrated device in active power filter |
| CN112436775A (en) * | 2020-11-12 | 2021-03-02 | 武汉科技大学 | Crane steel rope resonance elimination control method, device, equipment, storage medium and terminal |
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| CN112436775A (en) * | 2020-11-12 | 2021-03-02 | 武汉科技大学 | Crane steel rope resonance elimination control method, device, equipment, storage medium and terminal |
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