CN106887850A - A kind of device that terminal voltage is lifted along low-voltage distributing line segmentation switching capacitance - Google Patents
A kind of device that terminal voltage is lifted along low-voltage distributing line segmentation switching capacitance Download PDFInfo
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- CN106887850A CN106887850A CN201510976535.7A CN201510976535A CN106887850A CN 106887850 A CN106887850 A CN 106887850A CN 201510976535 A CN201510976535 A CN 201510976535A CN 106887850 A CN106887850 A CN 106887850A
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
A kind of device that terminal voltage is lifted along low-voltage distributing line segmentation switching capacitance, it is characterized by：In the transformer low voltage port of export, installation outlet end electric energy quality monitoring control device, multiple points are set in each load position of centre of gravity along distribution line, install electric capacity automatic switching device, three-phase respectively connect it is multigroup have grade reactive-load compensation mend altogether capacitor, have grade reactive-load compensation A, B, C phase point benefit capacitor, have level transfer active power AB, BC, CA line line capacitances；By power-frequency communication of electric or GPRS or carrier communication, capacitance group input order is to each electric capacity automatic switching device along distribution line subsection setup.Present invention sectional capacitance switching along, can be idle with segmented compensation, grading, lifting voltage, reaches terminal voltage and adds up to lift the effect of higher magnitude.
Description
Technical field
The invention belongs to low-voltage platform area power quality harnessed synthetically field, especially relate to a kind of logical
Cross the device that terminal voltage is lifted along low-voltage distributing line segmented configuration switching capacitance.
Background technology
At present, power supply department is low just for transformer when low-voltage platform area rate of qualified voltage index is examined
The rate of qualified voltage of output end is pressed, terminal voltage is not examined.And user be in end, from
Transformer to there is a segment distance between user, due to low-voltage distributing line impedance and user load impedance
Effect, produce excessive reactive current, mainly inductive reactive power electric current, make to be produced along circuit
The loss of voltage, causes user's terminal voltage relatively low.Therefore there is such situation：Transformer is exported
Voltage be qualified, but user's terminal voltage is unqualified, causes the complaint of user.Therefore, solve
User terminal brownout problem, is to reduce to complain, and improves the key of rate of qualified voltage.
The content of the invention
It is too low that the purpose of the present invention is directed to low-voltage platform area power factor caused by line impedance, causes
A kind of the reason for loss of voltage is excessive relatively low with terminal voltage, segmentation along low-voltage distributing line of design is thrown
The device that electric capacity lifts terminal voltage is cut, it is relatively low to solve the problems, such as low-voltage platform area terminal voltage.
The object of the present invention is achieved like this：It is a kind of to be carried along low-voltage distributing line segmentation switching capacitance
The device of terminal voltage is risen, it is characterized by：Including the electric energy matter installed in the transformer low voltage port of export
Amount monitor controller；Installed in multiple electric capacity automatic switching devices of distribution line；Connection three-phase
On multigroup there is a grade reactive-load compensation to mend capacitor altogether；Connection three-phase on have a grade reactive-load compensation A, B,
C phases point benefit capacitor；The level that has on connection three-phase shifts active power AB, BC, CA lines line electricity
Hold, above-mentioned capacitor is phase zero or the connected mode that is mutually in parallel with the connection of distribution line；Pass through
Power-frequency communication of electric or GPRS or carrier communication, realize transformer outlet end monitor controller
With the communicator of the communication of each point electric capacity automatic switching device.
Electric energy quality monitoring control device controller, electric capacity automatic switching device are dark blue using Beihai
The JKWN/H type controllers of development in science and technology Co., Ltd production.
There is a grade reactive-load compensation to mend capacitor altogether, produced using Guilin Power Capacitor Co., Ltd.
Self-recovery low-voltage parallel capacitor, from model BGWJ-0.45-30-3, power is
30kvar。
Capacitor fling-cut switch uses being combined that Beihai Shenlan Science and Technology Development Co., Ltd. produces
Switch, is SLFK-H/ Δs 380V55A from model.
There is grade reactive-load compensation A, B, C phase point benefit capacitor, use the limited duty of Guilin power capacitor
The self-recovery low-voltage parallel capacitor of Ren companies production, from model BGWJ-0.45-30-3YN,
Power is 3 × 10kvar.
Capacitor fling-cut switch uses being combined that Beihai Shenlan Science and Technology Development Co., Ltd. produces
Switch, is SLFK-H/ Δs 220V55A from model.
The present invention for taking above measure, by along sectional capacitance switching, can with segmented compensation without
Work(, grading, lifting voltage reaches terminal voltage and adds up to lift the effect of higher magnitude.Pass through simultaneously
The monitor controller that transformer outlet end is installed, can monitor along after capacitor switching it is idle because
Number, sends capacitor switching order in good time, will not cause to mend to fall to send nothing to high voltage side of transformer without merits and demerits
Work(power.
Brief description of the drawings
Accompanying drawing 1 is the wiring diagram of functional module of the invention.Wherein：An electricity is terminated with outlet
Energy quality-monitoring control device, multiple electric capacity are connected in low-voltage distributing line along linear load position of centre of gravity
Automatic switching device, for being segmented switching lifting terminal voltage.
Accompanying drawing 2 is electric energy quality monitoring control device functional-block diagram of the invention, explanation in square frame
The connecting relation of each function.
Accompanying drawing 3 is electric capacity automatic switching device functional-block diagram of the invention, illustrates each in square frame
The connecting relation of function.
In conjunction with drawings and Examples, the invention will be further described below.
Specific embodiment
The present invention is based on following know-why：Reactive power deficiency can cause load side electricity in power network
Press through it is low, conversely, as reactive power is superfluous, then load terminal voltage can be caused to raise.Therefore it is correct
Segmented compensation is idle, it is possible to reduce the idle loss of voltage for causing that flows back, and improves quality of voltage.
When electric load is transported to end load point from circuit, if U- circuit rated voltages, P-
Conveying active power, Qx- conveying reactive power, R- line resistances, X- line reactances, electric capacity is mended
Before repaying input, line voltage distribution loss is：Δ U=(PR+QxX)/U, input compensation electric capacity QCAfterwards, line
The road loss of voltage is：Δ U '=(PR+ (Qx-QC) X)/U, it is clear that reducing the loss of voltage is；
Δ U- Δs U '=QCX/U, generally, X ＞ R on circuit, therefore QxX ＞ PR, after input compensation electric capacity Qc,
Steady state voltage raises approximately about Δ U "=QCX/U, due to line end in the backward, line impedance
X is bigger, is thus closer to line end input electric capacity, and boost effect is better.And this method is used
Sectional capacitance switching concentrates switching rather than in end, mainly consider that low-voltage circuit impedance is along
Distribution, therefore segmentation carries out capacitor switching, can be not local switching capacitance value more than local
Reactive load value and caused local serious mistake to mend, reduce the idle loss of voltage for flowing back and causing, improve
Quality of voltage.
In the transformer low voltage port of export, installation outlet end electric energy quality monitoring control device, detection becomes
Depressor port of export three-phase voltage, electric current, power factor；Along distribution line in each load position of centre of gravity
Multiple points are set, electric capacity automatic switching device is installed, three-phase is respectively connected multigroup has grade reactive-load compensation to be total to
Capacitor is mended, had grade reactive-load compensation A, B, C phase point benefit capacitor, there is level to shift active power
AB, BC, CA line line capacitance, are phase zero or the connected mode that is mutually in parallel；By power line work
Frequency communication or GPRS or carrier communication, realize transformer outlet end monitor controller with each point electricity
Hold the communication of automatic switching device；Port of export electric energy quality monitoring control device detects transformer and goes out
The a certain phase power factor in mouth end is less than 1, during in idle deficient benefit state, logical by power line power frequency
Letter or GPRS or carrier communication send phase capacitance group input order to along distribution line subsection setup
Each electric capacity automatic switching device, a certain phase power factor be more than 1, in without merits and demerits mend state when,
The phase capacitance group is sent by power-frequency communication of electric or GPRS or carrier communication and cuts off order to edge
Each electric capacity automatic switching device of distribution line subsection setup；Each electric capacity of subsection setup is automatic along the line
After switching device receives excision order, the time of being postponed successively according to numeral order throws automatically by platform electric capacity
Cutting apparatus perform corresponding excision order, and after receiving input order, the phase voltage of switching phase line is wanted in differentiation
Whether higher than input upper voltage limit value, input order is not performed higher than higher limit, not higher than put into electricity
During pressure higher limit, the time of being postponed successively according to numeral order performs phase by platform electric capacity automatic switching device
Order should be put into, gradually local compensation inductive reactive power, reduce inductive reactive power flowing, it is low by voltage
A certain phase transfer active power reaches segmentation and reduces switching point voltage damage to voltage a certain phase high
Lose, improve the quality of voltage of switching point, realize that platform area line sectionalizing switching capacitance reduces the loss of voltage
With the purpose of grading, lifting voltage.
Accompanying drawing 1 is the wiring diagram of the functional module of the embodiment of the present invention.In fig. 1, electric energy matter
Amount monitor controller is arranged on the transformer low voltage port of export, mainly the responsible transformer low voltage port of export
Three-phase voltage, electric current and power factor detection, the transmission etc. of control end capacitor switching order,
Communicate real with electric capacity automatic switching device communication power-frequency communication of electric, carrier communication or GPRS
It is existing.Electric capacity automatic switching device installation site is in the transformer low voltage port of export to each load center of gravity position
Put, set along distribution line and multiple points are installed, typically there are tens to hundreds of meters, be mainly responsible for installation
The segmentation switching capacitance compensating reactive power of position, grading, lifting voltage controls to fill with electric energy quality monitoring
Communication power-frequency communication of electric, carrier communication or GPRS communication is put to realize.
Accompanying drawing 2 is the electric energy quality monitoring control device functional-block diagram of the embodiment of the present invention, square frame
In illustrate the connecting relation of each function.The main control comprising electric energy quality monitoring control device
Device, voltage, electric current and power factor detection module and communication module (power-frequency communication of electric or
GPRS or carrier communication).Controller be responsible for control detection three-phase voltage, electric current and power factor and
Send capacitor switching order, communication module (power-frequency communication of electric or GPRS or carrier communication)
It is responsible for for capacitor switching order being sent to end electric capacity automatic switching by power line or wireless network
Device, realizes the Control on Communication with the electric capacity automatic switching device along distribution line subsection setup.
Accompanying drawing 3 is the electric capacity automatic switching device functional-block diagram of the embodiment of the present invention, is said in square frame
Understand the connecting relation of each function.The main controller comprising electric capacity automatic switching device, voltage inspection
Survey module, communication module (power-frequency communication of electric or GPRS or carrier communication), have the idle benefit of level
Common benefit capacitor is repaid, had grade reactive-load compensation A, B, C phase point benefit capacitor, there is level to shift wattful power
Rate AB, BC, CA line line capacitances.Wherein electric capacity automatic switching device controller controls communication module
(power-frequency communication of electric or GPRS or carrier communication), realizes and electric energy quality monitoring control device
Communication；The control of electric capacity automatic switching device controller has a grade reactive-load compensation to mend capacitor altogether, realizes
Device position three-phase has the switching that grade electric capacity is mended altogether；Electric capacity automatic switching device controller is controlled
There is grade reactive-load compensation A, B, C phase point benefit capacitor position, realization have a grade reactive-load compensation A,
B, C phase point benefit capacitor difference switching；Electric capacity automatic switching device controller controls position
There is level to shift active power AB, BC, CA line line capacitances, realize that position active power has level
Balance adjustment.Electric capacity automatic switching device controller major function is the automatic throwing of control device electric capacity
Cut, after each electric capacity automatic switching device of subsection setup receives excision order along, according to numbering
Order postpones the time by the corresponding excision order of platform electric capacity automatic switching device execution successively.Receive input
After order, whether differentiation wants the phase voltage of switching phase line higher than input upper voltage limit value, higher than the upper limit
Value does not perform input order；When not higher than putting into upper voltage limit value, postponed successively according to numeral order
Time performs corresponding input order by platform electric capacity automatic switching device.Gradually local compensation perception nothing
Work(, reduces inductive reactive power flowing, by the low a certain phase transfer active power of voltage to high certain of voltage
One phase, using the method, reaches segmentation and reduces the switching point loss of voltage, improves the voltage of switching point
Quality, realizes that platform area line sectionalizing switching capacitance reduces the mesh of the loss of voltage and grading, lifting voltage
's.
The transformer that the embodiment of the present invention is used is 630KVA, a branch road, along low-voltage distribution
Circuit sets three points installs electric capacity automatic switching device is used to lift the branch road terminal voltage, makes
It is respectively GPRS communication patterns or power-frequency communication of electric pattern with communication pattern.
The electric energy quality monitoring control device controller at transformer outlet end uses the dark blue section in Beihai
Skill Development Co., Ltd JKWN/H type controllers, this controller carries GPRS and power frequency is logical
Letter module, carries three-phase voltage, electric current, power factor detection module, realizes that the quality of power supply is supervised
Control device and the Control on Communication of each electric capacity automatic switching device are surveyed, transformer outlet end is realized
Three-phase voltage, electric current, power factor detection.
The component type and quantity that the three electric capacity automatic switching devices installed along the line are used are complete
Equally, controller is controlled using Beihai Shenlan Science and Technology Development Co., Ltd. JKWN/H types
Device, this controller carries GPRS and frequency communication module, carries three-phase voltage, electric current, power
Factor detection module, realizes the Control on Communication with electric energy quality monitoring control device, realizes each peace
The detecting voltage by three phase of holding position.Capacitor is mended in grade reactive-load compensation that has for being used altogether, is Guilin
The self-recovery low-voltage parallel capacitor of power capacitor Co., Ltd production, from model
BGWJ-0.45-30-3, power is 30kvar.The capacitor fling-cut switch for being coupled uses the North Sea
The combination switch of the dark blue development in science and technology Co., Ltd production in city, is SLFK-H/ from model
Δ 380V55A, realizes the switching that three-phase has grade electric capacity to mend altogether；Used have a grade reactive-load compensation A,
B, C phase point benefit capacitor, is that the self-healing of Guilin Power Capacitor Co., Ltd.'s production is low
Pressure shnt capacitor, from model BGWJ-0.45-30-3YN, power is 3 × 10kvar,
The capacitor fling-cut switch for being coupled is produced using Beihai Shenlan Science and Technology Development Co., Ltd.
Combination switch, is SLFK-H/ Δ 220V55A from model, realize three-phase have a grade reactive-load compensation A,
B, C phase point benefit capacitor difference switching.
Actual motion of the present invention works well, and distribution line resistance is 0.5 Europe/KM, and reactance is 0.4
Europe/KM, the electric energy quality monitoring control device at transformer outlet end to the 1st electric capacity automatic switching
About 200 meters of device distance, then resistance is 0.1 Europe, and reactance is 0.08 Europe；2nd electric capacity is certainly
Dynamic about 180 meters of switching device distance, then resistance is 0.09 Europe, and reactance is 0.072 Europe；3rd
Individual about 200 meters of electric capacity automatic switching device distance, then resistance is 0.1 Europe, and reactance is 0.08 Europe.
Show that transformer outlet terminal voltage is about 230V, and whole devices are not from actually detected result is run
During input, the 1st voltage of electric capacity automatic switching device position in 195-200V, the 2nd electricity
Hold the voltage of automatic switching device position in 186-190V or so, the 3rd electric capacity automatic switching dress
The voltage of seated position in 180-185V or so, when the 1st, the 2nd, the 3rd electric capacity automatic switching dress
Put all input when, the 1st voltage of electric capacity automatic switching device position in 215-220V or so,
, in 205-210V or so, the 3rd electric capacity is certainly for 2nd voltage of electric capacity automatic switching device position
In 195-200V or so, terminal voltage obtains different degrees of carrying to the voltage of dynamic switching device position
Rise, operational effect illustrates effectiveness of the invention.
Claims (5)
1. it is a kind of to be segmented the device that switching capacitance lifts terminal voltage along low-voltage distributing line, it is characterized by：
Including the electric energy quality monitoring control device installed in the transformer low voltage port of export；Installed in many of distribution line
Individual electric capacity automatic switching device；Multigroup there is a grade reactive-load compensation to mend capacitor altogether on connection three-phase；Connection three-phase
On have grade reactive-load compensation A, B, G phase point benefit capacitor；The level that has on connection three-phase shifts active power
AB, BC, CA line line capacitance, above-mentioned capacitor are phase zero or the mutually company of being in parallel with the connection of distribution line
Connect mode；By power-frequency communication of electric or GPRS or carrier communication, the monitoring control of transformer outlet end is realized
The communicator of the communication of device processed and each point electric capacity automatic switching device.
2. a kind of along low-voltage distributing line segmentation switching capacitance lifting end electricity described in a Ju claim 1
The device of pressure, it is characterized by：Electric energy quality monitoring control device controller, electric capacity automatic switching device are used
The JKWN/H type controllers of Beihai Shenlan Science and Technology Development Co., Ltd.'s production.
3. a kind of along low-voltage distributing line segmentation switching capacitance lifting end electricity described in a Ju claim 1
The device of pressure, it is characterized by：There is a grade reactive-load compensation to mend capacitor altogether, use the limited duty of Guilin power capacitor
The self-recovery low-voltage parallel capacitor of Ren companies production, from model BGWJ-0.45-30-3, power is
30kvar。
4. a kind of along low-voltage distributing line segmentation switching capacitance lifting end electricity described in a Ju claim 1
The device of pressure, it is characterized by：Capacitor fling-cut switch is given birth to using Beihai Shenlan Science and Technology Development Co., Ltd.
The combination switch of product, is SLFK-H/ Δs 380V55A from model.
5. a kind of along low-voltage distributing line segmentation switching capacitance lifting end electricity described in a Ju claim 1
The device of pressure, it is characterized by：There is grade reactive-load compensation A, B, C phase point benefit capacitor, use Guilin electric power electricity
The self-recovery low-voltage parallel capacitor of container Co., Ltd production, from model
BGWJ-0.45-30-3YN, power is 3 × 10kvar.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510976535.7A CN106887850A (en) | 2015-12-15 | 2015-12-15 | A kind of device that terminal voltage is lifted along low-voltage distributing line segmentation switching capacitance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510976535.7A CN106887850A (en) | 2015-12-15 | 2015-12-15 | A kind of device that terminal voltage is lifted along low-voltage distributing line segmentation switching capacitance |
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| Publication Number | Publication Date |
|---|---|
| CN106887850A true CN106887850A (en) | 2017-06-23 |
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| CN201510976535.7A Pending CN106887850A (en) | 2015-12-15 | 2015-12-15 | A kind of device that terminal voltage is lifted along low-voltage distributing line segmentation switching capacitance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361224A (en) * | 2018-11-15 | 2019-02-19 | 黄淮学院 | Low-voltage network monitoring compensation system and compensation method under a kind of weak communication condition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078972A (en) * | 2014-07-18 | 2014-10-01 | 北海市深蓝科技发展有限责任公司 | Comprehensive electric energy quality treatment method in low-voltage platform area |
| CN205178512U (en) * | 2015-12-15 | 2016-04-20 | 北海市深蓝科技发展有限责任公司 | Terminal voltage's device is promoted along low pressure distribution lines segmentation switching electric capacity |
-
2015
- 2015-12-15 CN CN201510976535.7A patent/CN106887850A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078972A (en) * | 2014-07-18 | 2014-10-01 | 北海市深蓝科技发展有限责任公司 | Comprehensive electric energy quality treatment method in low-voltage platform area |
| CN205178512U (en) * | 2015-12-15 | 2016-04-20 | 北海市深蓝科技发展有限责任公司 | Terminal voltage's device is promoted along low pressure distribution lines segmentation switching electric capacity |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361224A (en) * | 2018-11-15 | 2019-02-19 | 黄淮学院 | Low-voltage network monitoring compensation system and compensation method under a kind of weak communication condition |
| CN109361224B (en) * | 2018-11-15 | 2020-09-08 | 黄淮学院 | Low-voltage distribution network monitoring compensation system and compensation method under weak communication condition |
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