CN105281334A - Stepless active power balance and reactive power optimization voltage regulation treatment method of low-voltage transformer area - Google Patents
Stepless active power balance and reactive power optimization voltage regulation treatment method of low-voltage transformer area Download PDFInfo
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- CN105281334A CN105281334A CN201410342256.0A CN201410342256A CN105281334A CN 105281334 A CN105281334 A CN 105281334A CN 201410342256 A CN201410342256 A CN 201410342256A CN 105281334 A CN105281334 A CN 105281334A
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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
A stepless active power balance and reactive power optimization voltage regulation treatment method of a low-voltage transformer area is characterized in that: an exit end power quality treatment device is installed at the low voltage exit end of a transformer, and a branch power quality treatment device is installed at the front of the load of each branch. The user voltage is stabilized, and the branch line loss is reduced.
Description
Technical field
The invention belongs to power quality controlling field, low-voltage platform area, particularly relate to the stepless active balance reactive power compensation in a kind of low-voltage platform area voltage-regulation administering method.
Background technology
Current low-voltage platform area, mainly refers to that 10KV/400V powers, the basic mode of connection: high pressure is delta connection, and low pressure is Y type, its quality of power supply, mainly contains three indexs: one is power supply reliability, and one is rate of qualified voltage, and one is voltage harmonic aberration rate.Power supply reliability describes the ratio that the time of powering accounts for total time, and by generating, transmission of electricity department determines, has nothing to do, therefore for low-voltage platform area, mainly contain rate of qualified voltage and voltage harmonic aberration rate with the load condition in platform district.And power supply unit is only examined the rate of qualified voltage of transformer low voltage output, not to non-terminal voltage examination, and user is in end, between transformer to user, there is a segment distance, be generally tens to hundreds of rice, a voltage difference is had from transformer outlet end to user side, namely there is a voltage step, as drop is excessive, a result can be caused: the voltage that power supply unit is powered is qualified, but user side voltage is underproof, cause the complaint of user.And voltage is defective, mainly user side brownout, therefore solves user side brownout problem, is to reduce the most basic reason complained.The object of the invention is just in order to solve the problem.
Summary of the invention
The object of patent of the present invention is the design stepless active balance reactive power compensation in a kind of low-voltage platform area voltage-regulation administering method, to solve the problems such as low-voltage platform area user side brownout, the loss of platform district be excessive.
The object of the present invention is achieved like this: the stepless active balance reactive power compensation in a kind of low-voltage platform area voltage-regulation administering method, it is characterized by: at the port of export of transformer low voltage, installation outlet end power quality controlling device, described port of export power quality controlling device comprises port of export power quality controlling device controller, and arrange respectively be connected with port of export power quality controlling device controller long-range and branch road short-range communication module, stepless inactivity generator SVG, harmonic filter APF; Branch road power quality controlling device is installed before each branch circuit load, described branch road power quality controlling device comprises branch road power quality controlling device controller, and arranges the branch road short-range communication module, branch road voltage regulator, the stepless reactive power generator SVG of branch road, the branch road filtering filter APF that are connected with branch road power quality controlling device controller respectively; Port of export power quality controlling device is by public telecommunication communication network or dedicated communications network, realization is docked with data management system, by power-frequency communication of electric or carrier communication or short-distance wireless communication, communication between the power quality controlling device realized and be arranged on user side on branch road, and the active power balance regulating and controlling transformer load regulates or transformer load reactive power compensation or the filtering of transformer load harmonic current; Branch road power quality controlling device is by power-frequency communication of electric or carrier communication or short-distance wireless communication, realize the communication between port of export power quality controlling device, and the active power balance regulating and controlling branch circuit load regulates or the reactive power compensation of branch circuit load or the filtering of branch circuit load harmonic current or branch circuit load boost in voltage regulate;
the method realizing active power balance adjustment and the stepless compensation of reactive power is:by the general principle of active balance, as larger than B phase in A phase active power, then between A, B phase, access electric capacity Cab, then 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, namely A phase active power reduces, and B phase active power increases, and the rest may be inferred for other phase.Reactive power compensation is then arbitrary lacks reactive power mutually, the corresponding phase reactive power of corresponding compensation, both the stepless balance adjustment of active power can be carried out with SVG, the stepless compensation of reactive power can be carried out again, the best effects of the best active power balance effect that the equipment that reaches allows and reactive power compensation simultaneously;
the method that the filtering realizing harmonic current is administered is:detect the harmonic current of test point, produce reverse with harmonic current direction, that amplitude is identical electric current by APF, inject test point by inductance, offset with harmonic current, thus harmonic carcellation electric current.
A transformer may have multiple branch road, and a branch road power quality controlling device all installed by each branch road, infield at transformer outlet end to tributary user load branch place or load center of gravity place.
Port of export device is referred to as below port of export power quality controlling device.Branching unit is referred to as below branch road power quality controlling device.
The present invention of above measure is taked to have following benefit:
1, stabilize user's voltage and reduce branch road line loss.Because transformer outlet end has a segment distance usually to user load point, be generally tens meters to hundreds of rice, as the laod unbalance of POL or power factor low, then zero line can produce very large electric current, the voltage at POL place can reduce a lot, as carried out reactive power compensation and active load balance adjustment herein, then electric current on zero line can be reduced, thus reduce branch road line loss, the voltage of POL also can raise, and meets user's requirement.
2, increase branch voltage.If branch road is after reactive power compensation and active balance regulate, voltage still can not meet the demands, then can starting resistor boosting regulatory function, meets the requirement of user.
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 have also been obtained guarantee, and after neutral line current reduces, transformer loss have also been obtained reduction.
4, the reactive power in platform district is backflowed very little.Because carrying out reactive power compensation at branch road, each branch circuit load point power factor reaches 1 substantially, and therefore whole district idle backflows very little, and line loss is reduced further.
5, the parameter of each branch circuit load point, except monitoring each parameter of transformer, directly can also be monitored, as voltage, electric current, power factor etc. in backstage.Relevant parameter, by power-frequency communication of electric or carrier communication or short-range wireless communication module, is sent port of export power quality controlling device, then send data management system by branch road power quality controlling device, and therefore the information understood of backstage 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.Harmonic current as branch road can not all filterings, and port of export power quality controlling device can also continue filtering, ensure that the filtering of platform district harmonic current.
7, operation cost is low.Because branch road is completed 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 device medium-long range communication function, by public telecommunication communication network, as GPRS or CDMA or special electric power communication network, realizes and the communication of data management system, and data management system can the operation of the whole device in control and monitor console district in real time.
Port of export device passes through power-frequency communication of electric
,carrier communication or short-range wireless communication module, realize communication, the operation of controlling brancher device or the data of receiving branch device with branching unit.
Branching unit, by power-frequency communication of electric, carrier communication or short-range wireless communication module, realizes the communication with port of export device, realizes transfer of data each other.
Port of export power quality controlling device medium-long range communication function, by public telecommunication communication network, as GPRS or CDMA or special electric power communication network, realize the communication with data management system, can require to use different communication protocol according to difference, as State Grid Corporation of China's company standard: Q/GDW376.1-2009 " power user power consumption information acquisition system communication protocol Part I: main website and acquisition terminal communication protocol " or China Nanfang Grid Co., Ltd company standard Q/CSG12101.8-2008 " marketing automation system loading office terminal, distribution transformer monitoring and metering terminal and low pressure meter-copy collector communication protocol ".Concrete function is shown in that respective protocol specifies.
Communicate with branch road power quality controlling device in port of export power quality controlling device and use power-frequency communication of electric, carrier communication or square distance wireless communication to realize.According to different communication channels, different communication protocol can be used, as MODBUS agreement or custom protocol.
Load balance and reactive power compensation, filter function is processed in port of export device and branching unit, realize with active device, include 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 used 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.
Boost in voltage regulates.Only have branching unit just to install voltage regulator, consider actual conditions, general user's terminal voltage only has reduction, and does not raise phenomenon, therefore adopts boost in voltage to regulate.When output voltage is lower than setting voltage, voltage regulator puts into operation, and automatic adjustment height voltage is to set point.General mode voltage regulator has a pressure regulation value the highest, when reaching the highest pressure regulation value, and can not up regulation voltage again.
The present invention is described in further detail in conjunction with the accompanying drawings and embodiments more below.
Accompanying drawing explanation
Accompanying drawing 1 is the winding diagram of the stepless active balance reactive power compensation in a kind of low-voltage platform area voltage-regulation administering method functional 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 at each branch circuit load place, a branch road installs one.
Accompanying drawing 2 is port of export power quality controlling device functional-block diagrams of the present invention, describes the connecting relation of each function in square frame.
Accompanying drawing 3 is branch road power quality controlling device functional-block diagrams of the present invention, describes the connecting relation of each function in square frame.
Accompanying drawing 4 is the concrete device parameters used in the port of export power quality controlling device of patent Example of the present invention.
Accompanying drawing 5 is the concrete device parameters used in the branch road power quality controlling device of patent Example of the present invention.
The invention will be further described in conjunction with the accompanying drawings and embodiments more below.
Embodiment
The winding diagram of accompanying drawing 1 to be 1 the be stepless active balance reactive power compensation in a kind of low-voltage platform area voltage-regulation administering method functional module.
In fig. 1, port of export device is arranged on the transformer low voltage port of export, the balance of primary responsibility Three-Phase Transformer active load, reactive power compensation and filtering etc., communicate with back-end data treatment system and to be realized by public telecommunication communication network or dedicated communications network, communicating with branching unit realizes with power-frequency communication of electric, carrier communication or square distance wireless communication.
Branching unit installation site is generally to starting to meet user or load center of gravity place at the transformer low voltage port of export, generally there is tens to hundreds of rice, the balance of three-phase active load, reactive power compensation, pressure regulation and filtering etc. after primary responsibility installation place, communicating with port of export device realizes with power-frequency communication of electric, carrier communication or square distance wireless communication.
Accompanying drawing 2 is port of export power quality controlling device functional-block diagrams of the present invention, describes the connecting relation of each function in square frame.Wherein port of export power quality controlling device controller controls long-range and branch road short-range communication module work, realizes and the communication of remote data management system and the communication of branching unit; Port of export power quality controlling device controller controls stepless reactive power generator SVG, realizes the stepless idle adjustment of transformer and meritorious stepless balance adjustment; Port of export power quality controlling device controller controls harmonic filter APF, realizes the filtering of transformer harmonic current.
Accompanying drawing 3 is branch road power quality controlling device functional-block diagrams of the present invention, describes the connecting relation of each function in square frame.Wherein branch road power quality controlling device controller controlling brancher short-range communication module, realize with port of export device communication; The stepless reactive power generator SVG of branch road power quality controlling device controller controlling brancher, realizes the stepless idle adjustment of branch road and meritorious stepless balance adjustment; Branch road power quality controlling device controller controlling brancher harmonic filter APF, realizes the filtering of branch road harmonic current; Branch road power quality controlling device controller controlling brancher voltage regulator, when voltage is less than set point, starts voltage regulation function, improves output voltage.
Accompanying drawing 4 is the concrete device parameters used in the port of export power quality controlling device of patent 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, use long-range and short range communication mode to be GPRS communication pattern and power-frequency communication of electric pattern respectively, realize and the communication of remote data management system and the communication of branching unit.The communication protocol that patent Example of the present invention uses is State Grid Corporation of China's company standard: Q/GDW376.1-2009 " power user power consumption information acquisition system communication protocol Part I: main website and acquisition terminal communication protocol "; Communicate with branch road power quality controlling device in port of export 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 communication of remote data management system and the communication of branching unit, it is interconnected that controller also realizes with miscellaneous equipment by 485 buses.The enhancement mode reacance generator that stepless reactive power generator SVG uses Shenzhen City Shenghong Electric Co., Ltd. to produce, power is 140Kvar, 415V, 3 phase 4 lines, model is Sinexcel140ASVG4L/ML, realizes stepless idle adjustment and meritorious stepless balance adjustment; Harmonic filter APF uses Beijing guide times APF that your Semiconductor Converting Technology Co., Ltd produces, and model is XDAPF3L-380/100, and every phase current 100A, realizes the filtering of harmonic current.
Accompanying drawing 5 is the concrete device parameters used in the branch road power quality controlling device of patent Example of the present invention.This example has two branch roads, and two branch parameters are all identical.Use short range communication mode to be power-frequency communication of electric pattern, realize the communication with port of export 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, realize and the communication of port of export device, it is interconnected that controller also realizes with miscellaneous equipment by 485 buses.The enhancement mode reacance generator that stepless reactive power generator SVG uses Shenzhen City Shenghong Electric Co., Ltd. to produce, power is 140Kvar, 415V, 3 phase 4 lines, model is Sinexcel140ASVG4L/ML, realizes stepless idle adjustment and meritorious stepless balance adjustment; Harmonic filter APF uses Beijing guide times APF that your Semiconductor Converting Technology Co., Ltd produces, and model is XDAPF3L-380/100, and every phase current 100A, realizes the filtering of harmonic current; Branch road voltage regulator, use the compensation voltage regulator that four directions, Shaanxi Huaneng Group Electric Appliance Equipment Co., Ltd produces, model is SBW-60(+10%), the highest pressure regulation value is+10%, i.e. most high energy boosted voltage 22 volts, and three-phase runs simultaneously, every phase power 20KVA, gross power is 60KVA.
This example actual motion effectiveness comparison is desirable, first tributary user bifurcation is to the distance about 200 meters of transformer, second branch road distance about 180 meters, zero line resistance about 0.5 Europe/KM, therefore the first branch road zero line resistance about (200/1000) * 0.5=0.1 Europe, the second branch road zero line resistance about (180/1000) * 0.5=0.09 Europe.All illustrate from backstage and actual detection, transformer outlet terminal voltage is about 230V, first branching unit place voltage is between 215-220, second branching unit place voltage is between 216-223, transformer outlet end and branching unit place power factor are essentially 1, each test point Harmonic Current Distortion rate is less than 15%, all meets user's requirement.As exited by whole device, then the first branch road and the second branching unit place voltage all have and are less than 165V phenomenon.Operational effect describes the validity of this method.
Claims (5)
1. the stepless active balance reactive power compensation in a low-voltage platform area voltage-regulation administering method, it is characterized by: at the port of export of transformer low voltage, installation outlet end power quality controlling device, described port of export power quality controlling device comprises port of export power quality controlling device controller, and arrange respectively be connected with port of export power quality controlling device controller long-range and branch road short-range communication module, stepless inactivity generator SVG, harmonic filter APF; Branch road power quality controlling device is installed before each branch circuit load, described branch road power quality controlling device comprises branch road power quality controlling device controller, and arranges the branch road short-range communication module, branch road voltage regulator, the stepless reactive power generator SVG of branch road, the branch road filtering filter APF that are connected with branch road power quality controlling device controller respectively; Port of export power quality controlling device is by public telecommunication communication network or dedicated communications network, realization is docked with data management system, by power-frequency communication of electric or carrier communication or short-distance wireless communication, communication between the power quality controlling device realized and be arranged on user side on branch road, and the active power balance regulating and controlling transformer load regulates or transformer load reactive power compensation or the filtering of transformer load harmonic current; Branch road power quality controlling device is by power-frequency communication of electric or carrier communication or short-distance wireless communication, realize the communication between port of export power quality controlling device, and the active power balance regulating and controlling branch circuit load regulates or the reactive power compensation of branch circuit load or the filtering of branch circuit load harmonic current or branch circuit load boost in voltage regulate;
the method realizing active power balance adjustment and the stepless compensation of reactive power is:by the general principle of active balance, as larger than B phase in A phase active power, then between A, B phase, access electric capacity Cab, then 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, namely A phase active power reduces, and B phase active power increases, and the rest may be inferred for other phase; Reactive power compensation is then arbitrary lacks reactive power mutually, the corresponding phase reactive power of corresponding compensation, both the stepless balance adjustment of active power can be carried out with SVG, the stepless compensation of reactive power can be carried out again, the best effects of the best active power balance effect that the equipment that reaches allows and reactive power compensation simultaneously;
the method that the filtering realizing harmonic current is administered is:detect the harmonic current of test point, produce reverse with harmonic current direction, that amplitude is identical electric current by APF, inject test point by inductance, offset with harmonic current, thus harmonic carcellation electric current.
2. the stepless active balance reactive power compensation in low-voltage platform area voltage-regulation administering method
, it is characterized by: multiple branch road transformer, a branch road power quality controlling device installed by each branch road.
3. the stepless active balance reactive power compensation in low-voltage platform area voltage-regulation administering method
, it is characterized by: branch road power quality controlling device infield at transformer outlet end to tributary user load branch place or load center of gravity place.
4. the stepless active balance reactive power compensation in low-voltage platform area voltage-regulation administering method
, it 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. the stepless active balance reactive power compensation in low-voltage platform area voltage-regulation administering method
, it 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..
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| CN201410342256.0A CN105281334A (en) | 2014-07-18 | 2014-07-18 | Stepless active power balance and reactive power optimization voltage regulation treatment method of low-voltage transformer area |
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| CN201410342256.0A CN105281334A (en) | 2014-07-18 | 2014-07-18 | Stepless active power balance and reactive power optimization voltage regulation treatment method of low-voltage transformer area |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924370A (en) * | 2010-09-08 | 2010-12-22 | 株洲变流技术国家工程研究中心有限公司 | A kind of mixed type power quality controlling device |
| CN103501058A (en) * | 2013-10-24 | 2014-01-08 | 南京国网电瑞继保科技有限公司 | Energy efficiency management system based on intelligent transformer area |
| CN203536968U (en) * | 2013-11-01 | 2014-04-09 | 广西电网公司北海供电局 | A power-frequency communication apparatus for controlling reactive compensation switching |
| 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 |
-
2014
- 2014-07-18 CN CN201410342256.0A patent/CN105281334A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924370A (en) * | 2010-09-08 | 2010-12-22 | 株洲变流技术国家工程研究中心有限公司 | A kind of mixed type power quality controlling device |
| CN103501058A (en) * | 2013-10-24 | 2014-01-08 | 南京国网电瑞继保科技有限公司 | Energy efficiency management system based on intelligent transformer area |
| CN203536968U (en) * | 2013-11-01 | 2014-04-09 | 广西电网公司北海供电局 | A power-frequency communication apparatus for controlling reactive compensation switching |
| 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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Application publication date: 20160127 |