CN104078972A - Comprehensive electric energy quality treatment method in low-voltage platform area - Google Patents
Comprehensive electric energy quality treatment method in low-voltage platform area Download PDFInfo
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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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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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
The method discloses a comprehensive electric energy quality treatment method in a low-voltage platform area. The comprehensive electric energy quality treatment method is characterized in that an outlet end electric energy quality treatment device and a device branch electric energy quality treatment device are arranged. According to the comprehensive electric energy quality treatment method, the user voltage is stabilized, the branch line loss is reduced, the using efficiency and safety of a transformer are improved, and operation cost is low.
Description
Technical field
The invention belongs to power quality harnessed synthetically field, low-voltage platform area, particularly relate to a kind of low-voltage platform area power quality harnessed synthetically method.
Background technology
Current low-voltage platform area, mainly refers to 10KV/400V power supply, the basic mode of connection: high pressure is delta connection, and low pressure is Y type, and its quality of power supply mainly contains three indexs: is power supply reliability, and is rate of qualified voltage, and is voltage harmonic aberration rate.The time that power supply reliability is described power supply accounts for the ratio of total time, and by generating, transmission of electricity department determines, the load condition in Yu Tai district is irrelevant, therefore for low-voltage platform area, mainly contains rate of qualified voltage and voltage harmonic aberration rate.And power supply unit is only examined the rate of qualified voltage of transformer low voltage output, not to not terminal voltage examination, and user is in end, there is a segment distance between from transformer to user, be generally tens to hundreds of rice, there is a voltage difference from the transformer port of export to user side, there is a voltage drop, as excessive in drop, can cause a result: the voltage of power supply unit power supply is qualified, but user side voltage is underproof, cause user's complaint.And voltage is defective, be mainly user side brownout, therefore solve user side brownout problem, be to reduce the basic reason of complaining.The object of the invention is just in order to address the above problem.
Summary of the invention
The object of patent of the present invention is design
a kind of low-voltage platform area power quality harnessed syntheticallymethod, solving low-voltage platform area user side brownout, the loss of platform district is excessive
'sproblem.
the object of the present invention is achieved like this: a kind of low-voltage platform area quality of power supply is comprehensiveadminister
method, it is characterized by: at the transformer low voltage port of export, port of export power quality controlling device is set, described port of export power quality controlling device comprise port of export power quality controlling device controller, be respectively connected with port of export power quality controlling device controller long-range and branch road short-range communication module, stepless reactive power generator SVG, harmonic filter APF, have grade reactive power compensation to mend altogether capacitor, have grade reactive power compensation A, a B, C to divide mutually to mend capacitor, have the meritorious compensation of level AB, a BC, a CA line line capacitance, before branch road load, install branch road power quality controlling device, described branch road power quality controlling device comprises branch road power quality controlling device controller, the branch road short-range communication module being connected with branch road power quality controlling device controller respectively, the stepless reactive power generator SVG of branch road, branch road harmonic filter APF, branch road has grade reactive power compensation to mend altogether capacitor, branch road has a grade reactive power compensation A, B, C divides benefit capacitor mutually, branch road has the meritorious compensation of level AB, BC, CA line line capacitance, branch road voltage regulator, under above-mentioned hardware combinations, carry out low-voltage platform area power quality harnessed synthetically,port of export power quality controlling device medium-long range communication function, by public telecommunications network GPRS or CDMA or special electric power communication network, realization is communicated by letter with data management system, in port of export power quality controlling device, communicate by letter with branch road power quality controlling device with power-frequency communication of electric or carrier communication or the realization of square distance wireless communication,
realize active power stepless, have the method for grade balance adjustment to be,press the general principle of active balance, as mutually larger than B in A phase active power, between A, B phase, access capacitor C ab, can produce two effects, one is that A, B phase reactive power can increase simultaneously, and a part of active power of A phase can be transferred to B phase, A phase active power reduces, and B phase active power increases, the rest may be inferred mutually for other, with there being level to carry out coarse adjustment, stepless fine tuning, the best active power balance effect allowing to reach equipment of carrying out,
realize reactive power stepless, have the method for grade reactive power compensation to be,as three-phase lacks reactive power simultaneously, there is grade electric capacity to mend altogether improvement and have a grade coarse adjustment, there are grade reactive power compensation A, a B, C to divide mutually benefit capacitor to have a grade fine tuning, the stepless idle fine tuning of carrying out again, the best reactive balance effect allowing to reach equipment, the direction that is 1 towards power factor advances, and running is first to carry out active power balance adjusting, and the reactive power compensation that reruns regulates,
realize harmonic current filtering administer method be,detect the harmonic current of test point, produce the electric current reverse with harmonic current direction, amplitude is identical by APF, inject test point by inductance, offset with harmonic current, thus harmonic carcellation electric current.
multiple branch road transformers, each branch road is installed a branch road power quality controlling device.
branch road power quality controlling device infield at the transformer port of export to branch road user load bifurcation or load center of gravity place.
port of export power quality controlling device controller uses the JKWN/H type controller of Beihai Shenlan Science and Technology Development Co., Ltd..
branch road power quality controlling device controller uses the JKWN/H type controller of Beihai Shenlan Science and Technology Development Co., Ltd.
Port of export power quality controlling device medium-long range communication function, by public telecommunications network, as GPRS or CDMA or special electric power communication network, realization is communicated by letter with data management system, can require to use different communication protocol according to difference, as State Grid Corporation of China's company standard: Q/GDW 376.1-2009 " power consumer power information acquisition system communication protocol Part I: main website and acquisition terminal communication protocol " or the company standard Q/CSG 12101.8-2008 of China Nanfang Grid Co., Ltd " marketing automation system loading office terminal, distribution transformer monitoring and metering terminal and low pressure meter-copy collector communication protocol ".
In port of export power quality controlling device, communicate by letter with branch road power quality controlling device with power-frequency communication of electric, carrier communication or the realization of square distance wireless communication.According to different communication channels, can use different communication protocol, as MODBUS agreement or custom protocol.
Take the present invention of above measure to stablize user's voltage and reduced branch road line loss, the branch voltage that raise, if branch road is after reactive power compensation and active balance regulate, voltage still can not meet the demands, the regulatory function boosted voltage that can starting resistor boosts, meets user's requirement.The present invention has also improved transformer service efficiency and safety, has reduced transformer loss, idlely backflows very littlely, and line loss is further reduced.The present invention only needs a remote channel, just can realize total data passback data management system, and operation cost is lower.
Brief description of the drawings
Accompanying drawing 1 is the winding diagram of a kind of low-voltage platform area power quality harnessed synthetically methodological function module.Wherein: be connected to a port of export power quality controlling device at the port of export, be connected to branch road power quality controlling device in each branch road load place, a branch road is installed one.
Accompanying drawing 2 is port of export power quality controlling device functional-block diagrams of the present invention, and the connecting relation of each function has been described in square frame.
Accompanying drawing 3 is branch road power quality controlling device functional-block diagrams of the present invention, and the connecting relation of each function has been described in square frame.
Accompanying drawing 4 is the concrete device device parameters that use in the port of export power quality controlling device of patent working example of the present invention.
Accompanying drawing 5 is the concrete device device parameters that use in the branch road power quality controlling device of patent working example of the present invention.
The invention will be further described in conjunction with the accompanying drawings and embodiments more below.
Embodiment
Implement the present invention to the following benefit of low-voltage platform area power quality harnessed synthetically:
1, stablize user's voltage and reduced branch road line loss.Because the transformer port of export has a segment distance conventionally to user load point, be generally tens meters to hundreds of rice, as the laod unbalance of POL or power factor low, on zero line, can produce very large electric current, the voltage at POL place can reduce a lot, as carried out herein reactive power compensation and active load balance adjustment, can be by current reduction on zero line, reduced thus branch road line loss, the voltage of POL also can raise, and has met user's requirement.
2, branch voltage has raise.If branch road is after reactive power compensation and active balance regulate, voltage still can not meet the demands, and the regulatory function boosted voltage that can starting resistor boosts, meets user's requirement.
3, improve transformer service efficiency and safety, reduce transformer loss.Active power regulation balance and reactive power are after overcompensation, and the service efficiency of transformer is improved, and its fail safe is also guaranteed, and after neutral line current reduces, transformer loss has also obtained reduction.
4, the reactive power in platform district is backflowed very little.Because carrying out reactive power compensation at branch road, each branch road POL power factor reaches 1 substantially, and therefore whole district idle backflows very littlely, and line loss is further reduced.
5, the device parameters of each branch road POL, except monitoring the each device parameters of transformer, can also directly be monitored, as voltage, electric current, power factor etc. in backstage.Branch road power quality controlling device, by power-frequency communication of electric or carrier communication or short-range wireless communication module, send port of export power quality controlling device by related device parameter, then send data management system, and the information that therefore backstage is understood is more comprehensive;
6, harmonic current filter effect is better.The harmonic current of load is limited in branch road, on transformer without impact.Because carrying out harmonic management at branch road, harmonic current is without transformer, and therefore branch road harmonic current does not affect transformer.As all filterings of the harmonic current of branch road, port of export power quality controlling device can also continue filtering, ensures the filtering of Liao Tai district harmonic current.
7, operation cost is low.Because branch road is to complete by frequency communication or carrier communication, therefore only need a remote channel, just can realize total data passback data management system, operation cost is lower.
Port of export power quality controlling device medium-long range communication function, by public telecommunications network, as GPRS or CDMA or special electric power communication network, realization is communicated by letter with data management system, data management system all operations of device of control and monitor console district in real time.
Port of export power quality controlling device passes through power-frequency communication of electric
,carrier communication or short-range wireless communication module, realization is communicated by letter with branching unit, controls the operation of branching unit or the data of receiving branch device.
Branching unit is by power-frequency communication of electric, carrier communication or short-range wireless communication module, and realization is communicated by letter with port of export power quality controlling device, realizes transfer of data each other.
In port of export power quality controlling device and branching unit, process load balance and reactive power compensation, filter function, comprise active and passive part, active part includes active power filter APF, static reacance generator SVG, SVG is used for providing the stepless reactive power of transient state to regulate and active power balance regulates, and APF is for filtering harmonic wave, and this two part can isolated operation, also can complete by a part, capacity can be selected by being suitable for the principle of saving according to load capacity simultaneously; Passive part includes grade reactive-load compensation capacitor and has a grade active power regulation capacitor, completes by combination switch control capacitance switching.There is a grade reactive-load compensation capacitor to comprise that reactive power compensation mends capacitor and reactive power compensation A, B, C point benefit capacitor mutually altogether; Having grade active power regulation capacitor is the AB line line active balance control capacittance Cab that is connected on AB phase, the BC line line active balance control capacittance that is connected on BC phase
cbc, be connected on the CA line line active balance control capacittance Cca of CA phase.There are grade reactive compensation capacitor and active power balance control capacittance to select respective sets number and capacity according to amount of capacity.
Boost in voltage regulates.Only have branching unit that voltage regulator is just installed, consider actual conditions, general user's terminal voltage only has reduction, and the phenomenon that do not raise, and therefore adopts boost in voltage to regulate, and regulates with series system.When output voltage is during lower than setting voltage, voltage regulator puts into operation, and automatic adjustment height voltage is to set point.General voltage regulator has a pressure regulation value the highest, in the time reaching the highest pressure regulation value, can not be again regulation voltage up.
Be described further in conjunction with the accompanying drawings and embodiments more below.
Accompanying drawing 1 is the winding diagram of a kind of low-voltage platform area power quality harnessed synthetically methodological function module.
In accompanying drawing 1, port of export power quality controlling device is arranged on the transformer low voltage port of export, main balance, reactive power compensation and the filtering etc. of being responsible for Three-Phase Transformer active load, communicate by letter with back-end data treatment system and realize by public telecommunications network or dedicated communications network, communicate by letter with branching unit with power-frequency communication of electric, carrier communication or the realization of square distance wireless communication.
Branching unit installation site is generally to starting to connect user or load center of gravity place at the transformer low voltage port of export, generally have tens to hundreds of rice, balance, reactive power compensation, pressure regulation and the filtering etc. of three-phase active load after main responsible installation place, communicate by letter with port of export power quality controlling device with power-frequency communication of electric, carrier communication or the realization of square distance wireless communication.
Accompanying drawing 2 is port of export power quality controlling device functional-block diagrams of the present invention, and the connecting relation of each function has been described in square frame.The wherein long-range and branch road short-range communication module of port of export power quality controlling device controller control work, realizes and the communicating by letter and the communication of branching unit of data management system at a distance; The stepless reactive power generator SVG of port of export power quality controlling device controller control, realizes the stepless idle adjusting of transformer and meritorious stepless balance adjustment; Port of export power quality controlling device controller control harmonic filter APF, realizes the filtering of transformer harmonic current; The control of port of export power quality controlling device controller has grade reactive power compensation to mend altogether capacitor, realizes the switching that three-phase has grade electric capacity to mend altogether; The control of port of export power quality controlling device controller has grade reactive power compensation A, a B, C point benefit capacitor mutually, realizes and has grade reactive power compensation A, a B, C to divide mutually benefit capacitor switching respectively; The control of port of export power quality controlling device controller has the meritorious compensation of level AB, BC, CA line line capacitance, and realizing active power has a grade balance adjustment.Adopt the method, realized well and had the idle and meritorious cheapness of grade balance adjustment and the idle and meritorious combination of stepless balance adjustment, practicality is better.
Accompanying drawing 3 is branch road power quality controlling device functional-block diagrams of the present invention, and the connecting relation of each function has been described in square frame.Wherein branch road power quality controlling device controller control branch road short-range communication module, realize with port of export power quality controlling device communicate by letter; The stepless reactive power generator SVG of branch road power quality controlling device controller control branch road, realizes the stepless idle adjusting of branch road and meritorious stepless balance adjustment; Branch road power quality controlling device controller control branch road harmonic filter APF, realizes the filtering of branch road harmonic current; Branch road power quality controlling device controller control branch road has grade reactive power compensation to mend altogether capacitor, realizes the switching that branch road three-phase has grade electric capacity to mend altogether; Branch road power quality controlling device controller control branch road has grade reactive power compensation A, a B, C point benefit capacitor mutually, and realizing branch road has grade reactive power compensation A, a B, C to divide mutually benefit capacitor switching respectively; Branch road power quality controlling device controller control branch road has the meritorious compensation of level AB, BC, CA line line capacitance, and realizing branch road active power has a grade balance adjustment; Branch road power quality controlling device controller control branch road voltage regulator, in the time that voltage is less than set point, starts voltage regulation function, improves output voltage.Adopt the method, realized well and had the idle and meritorious cheapness of grade balance adjustment and the idle and meritorious combination of stepless balance adjustment, practicality is better.
Accompanying drawing 4 is the concrete device device parameters that use in the port of export power quality controlling device of patent working example of the present invention.The transformer that this example uses is 630KVA, be divided into two outlets, two branch roads are installed selected wire diameter and are all arranged by 315KVA, get identical value, using long-range and short haul connection pattern is respectively GPRS communication pattern and power-frequency communication of electric pattern, realizes and the communicating by letter and the communication of branching unit of data management system at a distance.
The communication protocol that patent working example of the present invention is used is State Grid Corporation of China's company standard: Q/GDW 376.1-2009 " power consumer power information acquisition system communication protocol Part I: main website and acquisition terminal communication protocol "; In port of export power quality controlling device, communicate by letter with branch road power quality controlling device with power-frequency communication of electric, use communication protocol is MODBUS agreement.
Port of export power quality controlling device controller uses the JKWN/H type controller of Beihai Shenlan Science and Technology Development Co., Ltd., this controller carries GPRS and frequency communication module, realize and the communicating by letter and the communication of branching unit of remote data management system, controller is also realized by 485 buses and miscellaneous equipment interconnected.
What stepless reactive power generator SVG used is the enhancement mode reacance generator that Shenzhen City Shenghong Electric Co., Ltd. produces, power is 70Kvar, 415V, 3 phase 4 lines, model is Sinexcel 70 ASVG 4L/ML, realizes stepless idle adjusting and meritorious stepless balance adjustment.
The use of harmonic filter APF be Beijing guide Bei Er Semiconductor Converting Technology Co., Ltd produce APF, model is XDAPF3L-380/100, every phase current 100A, realizes the filtering of harmonic current.
There is grade reactive power compensation to mend altogether capacitor, what use is the self-recovery low-voltage parallel capacitor that Guilin Power Capacitor Co., Ltd. produces, model is BGMJ-0.45-30-3, power is 30kvar, the combination switch that the combination switch connecting uses Beihai Shenlan Science and Technology Development Co., Ltd. to produce, model is SLFK-H/ △ 380V55A, jointly realizes the switching that three-phase has grade electric capacity to mend altogether.
Control has grade reactive power compensation A, a B, C point benefit capacitor mutually, what use is the self-recovery low-voltage parallel capacitor that Guilin Power Capacitor Co., Ltd. produces, model is BGMJ-0.45-30-3YN, power is 3 × 10kvar, the combination switch that the combination switch connecting uses Beihai Shenlan Science and Technology Development Co., Ltd. to produce, model is SLFK-H/ △ 220V55A, and common realization has grade reactive power compensation A, a B, C to divide mutually benefit capacitor switching respectively.
There are the meritorious compensation of level AB, BC, CA line line capacitance, what use is the self-healing low-voltage capacitor that Guilin Power Capacitor Co., Ltd. produces, model is BGMJ-0.45-60-3LL, power is 3 × 20kvar, the combination switch that the combination switch connecting uses Beihai Shenlan Science and Technology Development Co., Ltd. to produce, model is SLFK-H/L380V55A, and jointly realizing active power has a grade balance adjustment.
Accompanying drawing 5 is the concrete device device parameters that use in the branch road power quality controlling device of patent working example of the present invention.This example has two branch roads, and two branch road device parameters are all identical.Using short haul connection pattern is power-frequency communication of electric pattern, and realization is communicated by letter with port of export power quality controlling device.
Branch road power quality controlling device controller uses the JKWN/H type controller of Beihai Shenlan Science and Technology Development Co., Ltd., this controller carries frequency communication module, realization is communicated by letter with port of export power quality controlling device, and controller also passes through the interconnected of 485 buses realizations and miscellaneous equipment.
What stepless reactive power generator SVG used is the enhancement mode reacance generator that Shenzhen City Shenghong Electric Co., Ltd. produces, power is 70Kvar, 415V, 3 phase 4 lines, model is Sinexcel 70 ASVG 4L/ML, realizes stepless idle adjusting and meritorious stepless balance adjustment.
The use of harmonic filter APF be Beijing guide Bei Er Semiconductor Converting Technology Co., Ltd produce APF, model is XDAPF3L-380/100, every phase current 100A, realizes the filtering of harmonic current.
There is grade reactive power compensation to mend altogether capacitor, what use is the self-recovery low-voltage parallel capacitor that Guilin Power Capacitor Co., Ltd. produces, model is BGMJ-0.45-30-3, power is 30kvar, the combination switch that the combination switch connecting uses Beihai Shenlan Science and Technology Development Co., Ltd. to produce, model is SLFK-H/ △ 380V55A, jointly realizes the switching that three-phase has grade electric capacity to mend altogether.
Control has grade reactive power compensation A, a B, C point benefit capacitor mutually, what use is the self-recovery low-voltage parallel capacitor that Guilin Power Capacitor Co., Ltd. produces, model is BGMJ-0.45-30-3YN, power is 3 × 10kvar, the combination switch that the combination switch connecting uses Beihai Shenlan Science and Technology Development Co., Ltd. to produce, model is SLFK-H/ △ 220V55A, and common realization has grade reactive power compensation A, a B, C to divide mutually benefit capacitor switching respectively.
There are the meritorious compensation of level AB, BC, CA line line capacitance, what use is the self-recovery low-voltage parallel capacitor that Guilin Power Capacitor Co., Ltd. produces, model is BGMJ-0.45-60-3LL, power is 3 × 20kvar, the combination switch that the combination switch connecting uses Beihai Shenlan Science and Technology Development Co., Ltd. to produce, model is SLFK-H/L380V55A, and jointly realizing active power has a grade balance adjustment.
Branch road voltage regulator, use be the compensation voltage regulator that Huaneng Group, Shaanxi four directions Electric Appliance Equipment Co., Ltd produces, model is SBW-60(+10%), the highest pressure regulation value is+10%, i.e. 22V, three-phase moves simultaneously, every phase power 20KVA, gross power is 60KVA.
This example actual motion effect is more satisfactory, the first branch road user bifurcation is to approximately 200 meters of the distances of transformer, the second approximately 180 meters of branch road distances, approximately 0.5 Europe/KM of zero line resistance, therefore approximately (200/1000) * 0.5=0.1 Europe of the first branch road zero line resistance, the second branch road zero line resistance is (180/1000) * 0.5=0.09 Europe approximately.From backstage and actual detect all explanations, transformer outlet voltage is about 230V, the first branching unit place voltage is between 205-220, the second branching unit place voltage is between 206-223, the transformer port of export and branching unit place power factor are essentially 1, the harmonic current aberration rate of each test point is all less than 15%, all meets user's requirement.As whole devices exits, the first branch road and the second branching unit place voltage all have the 165V of being less than phenomenon.Operational effect has illustrated the validity of this method.
Claims (5)
1. a low-voltage platform area power quality harnessed synthetically method, it is characterized by: at the transformer low voltage port of export, port of export power quality controlling device is set, described port of export power quality controlling device comprise port of export power quality controlling device controller, be respectively connected with port of export power quality controlling device controller long-range and branch road short-range communication module, stepless reactive power generator SVG, harmonic filter APF, have grade reactive power compensation to mend altogether capacitor, have grade reactive power compensation A, a B, C to divide mutually to mend capacitor, have the meritorious compensation of level AB, a BC, a CA line line capacitance, before branch road load, install branch road power quality controlling device, described branch road power quality controlling device comprises branch road power quality controlling device controller, the branch road short-range communication module being connected with branch road power quality controlling device controller respectively, the stepless reactive power generator SVG of branch road, branch road harmonic filter APF, branch road has grade reactive power compensation to mend altogether capacitor, branch road has a grade reactive power compensation A, B, C divides benefit capacitor mutually, branch road has the meritorious compensation of level AB, BC, CA line line capacitance, branch road voltage regulator, under above-mentioned hardware combinations, carry out low-voltage platform area power quality harnessed synthetically, port of export power quality controlling device medium-long range communication function, by public telecommunications network GPRS or CDMA or special electric power communication network, realization is communicated by letter with data management system, in port of export power quality controlling device, communicate by letter with branch road power quality controlling device with power-frequency communication of electric or carrier communication or the realization of square distance wireless communication, realize active power stepless, have the method for grade balance adjustment to be, press the general principle of active balance, as mutually larger than B in A phase active power, between A, B phase, access capacitor C ab, can produce two effects, one is that A, B phase reactive power can increase simultaneously, and a part of active power of A phase can be transferred to B phase, be that A phase active power reduces, B phase active power increases, and the rest may be inferred mutually for other, with there being level to carry out coarse adjustment, stepless fine tuning, the best active power balance effect allowing to reach equipment of carrying out, realize reactive power stepless, have the method for grade reactive power compensation to be, as three-phase lacks reactive power simultaneously, there is grade electric capacity to mend altogether improvement and have a grade coarse adjustment, there are grade reactive power compensation A, a B, C to divide mutually benefit capacitor to have a grade fine tuning, the stepless idle fine tuning of carrying out again, the best reactive balance effect allowing to reach equipment, the direction that is 1 towards power factor advances, running is first to carry out active power balance adjusting, and the reactive power compensation that reruns regulates, realize harmonic current filtering administer method be, detect the harmonic current of test point, produce the electric current reverse with harmonic current direction, amplitude is identical by APF, inject test point by inductance, offset with harmonic current, thereby harmonic carcellation electric current.
2. low-voltage platform area according to claim 1 power quality harnessed synthetically method, is characterized by: multiple branch road transformers, each branch road is installed a branch road power quality controlling device.
3. low-voltage platform area according to claim 1 power quality harnessed synthetically method, is characterized by: branch road power quality controlling device infield at the transformer port of export to branch road user load bifurcation or load center of gravity place.
4. low-voltage platform area according to claim 1 power quality harnessed synthetically method, is characterized by: port of export power quality controlling device controller uses the JKWN/H type controller of Beihai Shenlan Science and Technology Development Co., Ltd..
5. low-voltage platform area according to claim 1 power quality harnessed synthetically method, is characterized by: branch road power quality controlling device controller uses the JKWN/H type controller of Beihai Shenlan Science and Technology Development Co., Ltd..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410342258.XA CN104078972A (en) | 2014-07-18 | 2014-07-18 | Comprehensive electric energy quality treatment method in low-voltage platform area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410342258.XA CN104078972A (en) | 2014-07-18 | 2014-07-18 | Comprehensive electric energy quality treatment method in low-voltage platform area |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374468A (en) * | 2015-07-22 | 2017-02-01 | 利思电气（上海）有限公司 | Control system for pole-mounted power active filtering apparatus |
| CN106887849A (en) * | 2015-12-15 | 2017-06-23 | 北海市深蓝科技发展有限责任公司 | A kind of method for lifting terminal voltage along low-voltage distributing line segmentation switching capacitance |
| CN106887850A (en) * | 2015-12-15 | 2017-06-23 | 北海市深蓝科技发展有限责任公司 | A kind of device that terminal voltage is lifted along low-voltage distributing line segmentation switching capacitance |
| CN106887851A (en) * | 2015-12-15 | 2017-06-23 | 北海市深蓝科技发展有限责任公司 | The method and device of terminal voltage is lifted along low-voltage distributing line segmentation switching capacitance |
| CN107221938A (en) * | 2017-05-26 | 2017-09-29 | 浙江晟泰电气有限公司 | Mixed compensation method and mixed compensation device |
| CN113708383A (en) * | 2021-09-16 | 2021-11-26 | 安徽海螺建材设计研究院有限责任公司 | Electric energy loss and electric energy quality comprehensive processing method and system |
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| CN103762609A (en) * | 2014-02-17 | 2014-04-30 | 北海市聚志电子科技有限公司 | Active power regulation and reactive power compensation control system of power distribution network remotely controlled through power frequency communication |
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| CN101552491A (en) * | 2009-05-22 | 2009-10-07 | 山东鲁电电气集团有限公司 | Integrated energy saving system of power supply and distribution system |
| CN103762609A (en) * | 2014-02-17 | 2014-04-30 | 北海市聚志电子科技有限公司 | Active power regulation and reactive power compensation control system of power distribution network remotely controlled through power frequency communication |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374468A (en) * | 2015-07-22 | 2017-02-01 | 利思电气（上海）有限公司 | Control system for pole-mounted power active filtering apparatus |
| CN106887849A (en) * | 2015-12-15 | 2017-06-23 | 北海市深蓝科技发展有限责任公司 | A kind of method for lifting terminal voltage along low-voltage distributing line segmentation switching capacitance |
| CN106887850A (en) * | 2015-12-15 | 2017-06-23 | 北海市深蓝科技发展有限责任公司 | A kind of device that terminal voltage is lifted along low-voltage distributing line segmentation switching capacitance |
| CN106887851A (en) * | 2015-12-15 | 2017-06-23 | 北海市深蓝科技发展有限责任公司 | The method and device of terminal voltage is lifted along low-voltage distributing line segmentation switching capacitance |
| CN107221938A (en) * | 2017-05-26 | 2017-09-29 | 浙江晟泰电气有限公司 | Mixed compensation method and mixed compensation device |
| CN113708383A (en) * | 2021-09-16 | 2021-11-26 | 安徽海螺建材设计研究院有限责任公司 | Electric energy loss and electric energy quality comprehensive processing method and system |
| CN113708383B (en) * | 2021-09-16 | 2024-05-17 | 安徽海螺建材设计研究院有限责任公司 | Comprehensive processing method and system for electric energy loss and electric energy quality |
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