CN205178512U - Terminal voltage's device is promoted along low pressure distribution lines segmentation switching electric capacity - Google Patents
Terminal voltage's device is promoted along low pressure distribution lines segmentation switching electric capacity Download PDFInfo
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- CN205178512U CN205178512U CN201521081837.XU CN201521081837U CN205178512U CN 205178512 U CN205178512 U CN 205178512U CN 201521081837 U CN201521081837 U CN 201521081837U CN 205178512 U CN205178512 U CN 205178512U
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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
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- 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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Abstract
The utility model provides a terminal voltage's device is promoted along low pressure distribution lines segmentation switching electric capacity, characterized in that: at the transformer low voltage exit end, installation exit end electric energy quality monitoring controlling means sets up a plurality ofly at each load centre of gravity place along distribution lines, and the multiunit is respectively connected to the automatic switching device of installation electric capacity, three -phase has grade reactive compensation to mend the condenser altogether, has a grade reactive compensation A, B, C to divide mutually and mend the condenser, have the level to shift an active power AB, BC, CA line electric capacity, through the communication of power line power frequency or GPRS or carrier communication, electric capacity group drops into the order and gives the automatic switching device of each electric capacity of following the distribution lines segmentation and setting up. The utility model discloses a segmentation electric capacity switching along the line can compensate idlely by stage, and hierarchical booster tension reaches the effect that terminal voltage accumulative total promoted great amplitude.
Description
Technical field
The utility model belongs to power quality harnessed synthetically field, low-voltage platform area, particularly relates to a kind of device by promoting terminal voltage along low-voltage distributing line segmented configuration switching capacitance.
Background technology
At present, the rate of qualified voltage of power supply department when examining low-voltage platform area rate of qualified voltage index only for transformer low voltage output, does not examine terminal voltage.And user is at end, between transformer to user, there is a segment distance, due to the effect of low-voltage distributing line impedance and user load impedance, produce excessive reactive current, mainly perceptual reactive current, makes circuit produce the loss of voltage along the line, causes user's terminal voltage on the low side.Therefore there is such situation: the voltage that transformer exports is qualified, but user side voltage is defective, causes the complaint of user.Therefore, solve user side brownout problem, be reduce to complain, improve the key of rate of qualified voltage.
Summary of the invention
The purpose of this utility model is because line impedance causes power factor too low for low-voltage platform area, cause the reason that the loss of voltage is excessive and terminal voltage is on the low side, design a kind of device promoting terminal voltage along low-voltage distributing line segmentation switching capacitance, to solve low-voltage platform area terminal voltage problem on the low side.
The purpose of this utility model is achieved in that a kind of device promoting terminal voltage along low-voltage distributing line segmentation switching capacitance, it is characterized by: comprise the electric energy quality monitoring control device being arranged on the transformer low voltage port of export; Be arranged on multiple electric capacity automatic switching devices of distribution line; Many groups of connecting on three-phase have a grade reactive power compensation to mend capacitor altogether; Connecting, three-phase has grade reactive power compensation A, B, C phase point benefit capacitor; The level that has connected on three-phase shifts active power AB, BC, CA line line capacitance, and above-mentioned capacitor and the connection of distribution line are phase zero or the connected mode that is in parallel mutually; By power-frequency communication of electric or GPRS or carrier communication, realize the communicator of the communication of transformer outlet end monitor controller and each point electric capacity automatic switching device.
The JKWN/H type controller that electric energy quality monitoring control device controller, electric capacity automatic switching device use Beihai Shenlan Science and Technology Development Co., Ltd. to produce.
Have a grade reactive power compensation to mend capacitor altogether, use the self-recovery low-voltage parallel capacitor that Guilin Power Capacitor Co., Ltd. produces, select model to be BGWJ-0.45-30-3, power is 30kvar.
The combination switch that capacitor fling-cut switch uses Beihai Shenlan Science and Technology Development Co., Ltd. to produce, selects model to be SLFK-H/ △ 380V55A.
Have grade reactive power compensation A, B, C phase point benefit capacitor, use the self-recovery low-voltage parallel capacitor that Guilin Power Capacitor Co., Ltd. produces, select model to be BGWJ-0.45-30-3YN, power is 3 × 10kvar.
The combination switch that capacitor fling-cut switch uses Beihai Shenlan Science and Technology Development Co., Ltd. to produce, selects model to be SLFK-H/ △ 220V55A.
Take the utility model of above measure, by sectional capacitance switching along the line, can segmented compensation idle, grading, lifting voltage, reaches terminal voltage and adds up to promote the effect of higher magnitude.Simultaneously by the monitor controller that transformer outlet end is installed, can monitor the quadrature factor after capacitor switching along the line, send capacitor switching order in good time, unlikely causing send reactive power without merits and demerits benefit to high voltage side of transformer.
Accompanying drawing explanation
Accompanying drawing 1 is the winding diagram of functional module of the present utility model.Wherein: be connected to an electric energy quality monitoring control device at the port of export, be connected to multiple electric capacity automatic switching device at low-voltage distributing line along linear load position of centre of gravity, promote terminal voltage for segmentation switching.
Accompanying drawing 2 is electric energy quality monitoring control device functional-block diagrams of the present utility model, describes the connecting relation of each function in square frame.
Accompanying drawing 3 is electric capacity automatic switching device functional-block diagrams of the present utility model, describes the connecting relation of each function in square frame.
The utility model is described in further detail in conjunction with the accompanying drawings and embodiments more below.
Embodiment
The utility model is based on following know-why: in electrical network, reactive power deficiency can cause load side brownout, otherwise, as reactive power is superfluous, then load side voltage can be caused to raise.Therefore correct segmented compensation is idle, can reduce the loss of voltage that idle backflow causes, improve quality of voltage.
When electric load is transported to end load point from circuit, if U-circuit rated voltage, P-carries active power, Q
x-conveying reactive power, R-line resistance, X-line reactance, before capacitance compensation drops into, line voltage distribution loss is: △ U=(PR+Q
xx)/U, input compensation electric capacity Q
cafter, line voltage distribution loss is: △ U '=(PR+ (Q
x-Q
c) X)/U, obviously reducing the loss of voltage is: △ U-△ U '=Q
cx/U, usually, X > R on circuit, therefore Q
xx > PR, after input compensation electric capacity Qc, steady state voltage raises to be similar to and is about △ U "=Q
cx/U, due to line end more backward, line impedance X is larger, thus the closer to line end drop into electric capacity, boosting effect better.And this method adopts sectional capacitance switching instead of concentrates switching at end, mainly consider that low-voltage circuit impedance is distribution along the line, therefore capacitor switching is carried out in segmentation, local switching capacitance value can be unlikely be greater than local reactive load value and cause serious mistake the in local to mend, reduce the loss of voltage that idle backflow causes, improve quality of voltage.
At the transformer low voltage port of export, installation outlet end electric energy quality monitoring control device, detects transformer outlet end three-phase voltage, electric current, power factor, along distribution line, multiple point is set at each load position of centre of gravity, electric capacity automatic switching device is installed, three-phase respectively connect many groups have grade reactive power compensation to mend capacitor altogether, have grade reactive power compensation A, B, C phase divide mend capacitor, have level shift active power AB, BC, CA line line capacitance, be phase zero or the connected mode that is in parallel mutually, by power-frequency communication of electric or GPRS or carrier communication, realize the communication of transformer outlet end monitor controller and each point electric capacity automatic switching device, port of export electric energy quality monitoring control device detects that a certain phase power factor of transformer outlet end is less than 1, when being in idle deficient benefit state, send this phase capacitance group by power-frequency communication of electric or GPRS or carrier communication and drop into order to each electric capacity automatic switching device along distribution line subsection setup, a certain phase power factor is greater than 1, be in when mending state without merits and demerits, send this phase capacitance group excision order to each electric capacity automatic switching device along distribution line subsection setup by power-frequency communication of electric or GPRS or carrier communication, after each electric capacity automatic switching device of subsection setup along the line receives and excises order, corresponding excision order is performed by platform electric capacity automatic switching device according to the numeral order time of postponing successively, receive after dropping into order, differentiate that whether the phase voltage wanting switching phase line is higher than input upper voltage limit value, do not perform higher than higher limit and drop into order, time not higher than input upper voltage limit value, the order of corresponding input is performed by platform electric capacity automatic switching device according to the numeral order time of postponing successively, successively local compensation perception is idle, reduce perceptual idle flowing, by the low a certain phase transfer active power of voltage to the high a certain phase of voltage, reach segmentation and reduce the loss of switching point voltage, improve the quality of voltage of switching point, realize the object that platform district line sectionalizing switching capacitance reduces the loss of voltage and grading, lifting voltage.
Accompanying drawing 1 is the winding diagram of the functional module of the utility model embodiment.In fig. 1, electric energy quality monitoring control device is arranged on the transformer low voltage port of export, the three-phase voltage of the primary responsibility transformer low voltage port of export, electric current and power factor detect, control the transmission etc. of end capacitor switching order, and communicating with electric capacity automatic switching device communicates with power-frequency communication of electric, carrier communication or GPRS realizes.Electric capacity automatic switching device installation site is to each load position of centre of gravity at the transformer low voltage port of export, arrange along distribution line and multiple point is installed, generally there is tens to hundreds of rice, the segmentation switching capacitance compensating reactive power of primary responsibility installation site, grading, lifting voltage, communicating with electric energy quality monitoring control device communicates with power-frequency communication of electric, carrier communication or GPRS realizes.
Accompanying drawing 2 is electric energy quality monitoring control device functional-block diagrams of the utility model embodiment, describes the connecting relation of each function in square frame.Mainly comprise the controller of electric energy quality monitoring control device, voltage, electric current and power factor detection module and communication module (power-frequency communication of electric or GPRS or carrier communication).Controller is responsible for controlling to detect three-phase voltage, electric current and power factor and the order of transmission capacitor switching, communication module (power-frequency communication of electric or GPRS or carrier communication) is responsible for capacitor switching order to be sent to end electric capacity automatic switching device by power line or wireless network, realizes and the Control on Communication along the electric capacity automatic switching device of distribution line subsection setup.
Accompanying drawing 3 is electric capacity automatic switching device functional-block diagrams of the utility model embodiment, describes the connecting relation of each function in square frame.Mainly comprise the controller of electric capacity automatic switching device, voltage detection module, communication module (power-frequency communication of electric or GPRS or carrier communication), have grade reactive power compensation to mend capacitor altogether, have grade reactive power compensation A, B, C phase to divide to mend capacitor, have level to shift active power AB, BC, CA line line capacitance.Wherein electric capacity automatic switching device controller controls communication module (power-frequency communication of electric or GPRS or carrier communication), realizes the communication with electric energy quality monitoring control device; Electric capacity automatic switching device controller controls have a grade reactive power compensation to mend capacitor altogether, the switching that implement device position three-phase has grade electric capacity to mend altogether; Electric capacity automatic switching device controller controls position grade reactive power compensation A, B, C phase point benefit capacitor, realizes having grade reactive power compensation A, B, C phase to divide and mends capacitor switching respectively; Electric capacity automatic switching device controller controls position has level to shift active power AB, BC, CA line line capacitance, and realizing position active power has a grade balance adjustment.Electric capacity automatic switching device controller major function is the automatic switching of control device electric capacity, after each electric capacity automatic switching device of subsection setup along the line receives excision order, perform corresponding excision order according to the numeral order time of postponing successively by platform electric capacity automatic switching device.Receive after dropping into order, differentiate that whether the phase voltage wanting switching phase line is higher than input upper voltage limit value, do not perform higher than higher limit and drops into order; Time not higher than input upper voltage limit value, perform the order of corresponding input according to the numeral order time of postponing successively by platform electric capacity automatic switching device.Successively local compensation perception is idle, reduce perceptual idle flowing, by the low a certain phase transfer active power of voltage to the high a certain phase of voltage, adopt the method, reach segmentation and reduce the loss of switching point voltage, improve the quality of voltage of switching point, realize the object that platform district line sectionalizing switching capacitance reduces the loss of voltage and grading, lifting voltage.
The transformer that the utility model embodiment uses is 630KVA, a branch road, three points are set along low-voltage distributing line and electric capacity automatic switching device are installed for promoting this branch road terminal voltage, use communication pattern to be GPRS communication pattern or power-frequency communication of electric pattern respectively.
The electric energy quality monitoring control device controller of transformer outlet end uses Beihai Shenlan Science and Technology Development Co., Ltd. JKWN/H type controller, this controller carries GPRS and frequency communication module, carry three-phase voltage, electric current, power factor detection module, realize the Control on Communication of electric energy quality monitoring control device and each electric capacity automatic switching device, realize the three-phase voltage of transformer outlet end, electric current, power factor detection.
Components and parts type and the quantity of three electric capacity automatic switching devices uses of installation along the line are just the same, controller all uses Beihai Shenlan Science and Technology Development Co., Ltd. JKWN/H type controller, this controller carries GPRS and frequency communication module, carry three-phase voltage, electric current, power factor detection module, realize, with the Control on Communication of electric energy quality monitoring control device, realizing the detecting voltage by three phase of each installation site.Grade reactive power compensation that has used mends capacitor altogether, and be the self-recovery low-voltage parallel capacitor that Guilin Power Capacitor Co., Ltd. produces, select model to be BGWJ-0.45-30-3, power is 30kvar.The combination switch that the capacitor fling-cut switch connected uses Beihai Shenlan Science and Technology Development Co., Ltd. to produce, selects model to be SLFK-H/ △ 380V55A, realizes the switching that three-phase has grade electric capacity to mend altogether; What used has grade reactive power compensation A, B, C phase point benefit capacitor, it is the self-recovery low-voltage parallel capacitor that Guilin Power Capacitor Co., Ltd. produces, model is selected to be BGWJ-0.45-30-3YN, power is 3 × 10kvar, the combination switch that the capacitor fling-cut switch connected uses Beihai Shenlan Science and Technology Development Co., Ltd. to produce, select model to be SLFK-H/ △ 220V55A, realizing three-phase has grade reactive power compensation A, B, C phase to divide benefit capacitor switching respectively.
The utility model actual motion is respond well, distribution line resistance is 0.5 Europe/KM, and reactance is 0.4 Europe/KM, and the electric energy quality monitoring control device of transformer outlet end is to the 1st electric capacity automatic switching device distance about 200 meters, then resistance is 0.1 Europe, and reactance is 0.08 Europe; 2nd electric capacity automatic switching device distance about 180 meters, then resistance is 0.09 Europe, and reactance is 0.072 Europe; 3rd electric capacity automatic switching device distance about 200 meters, then resistance is 0.1 Europe, and reactance is 0.08 Europe.Show from the actual testing result of operation, transformer outlet terminal voltage is about 230V, when whole device does not drop into, the voltage of the 1st electric capacity automatic switching device position is at 195-200V, the voltage of the 2nd electric capacity automatic switching device position is at about 186-190V, the voltage of the 3rd electric capacity automatic switching device position is at about 180-185V, when the 1st, 2nd, when 3rd electric capacity automatic switching device all drops into, the voltage of the 1st electric capacity automatic switching device position is at about 215-220V, the voltage of the 2nd electric capacity automatic switching device position is at about 205-210V, the voltage of the 3rd electric capacity automatic switching device position is at about 195-200V, terminal voltage obtains lifting in various degree, operational effect describes validity of the present utility model.
Claims (5)
1. promote a device for terminal voltage along low-voltage distributing line segmentation switching capacitance, it is characterized by: comprise the electric energy quality monitoring control device being arranged on the transformer low voltage port of export; Be arranged on multiple electric capacity automatic switching devices of distribution line; Many groups of connecting on three-phase have a grade reactive power compensation to mend capacitor altogether; Connecting, three-phase has grade reactive power compensation A, B, C phase point benefit capacitor; The level that has connected on three-phase shifts active power AB, BC, CA line line capacitance, and above-mentioned capacitor and the connection of distribution line are phase zero or the connected mode that is in parallel mutually; By power-frequency communication of electric or GPRS or carrier communication, realize the communicator of the communication of transformer outlet end monitor controller and each point electric capacity automatic switching device.
2. a Ju a kind of device promoting terminal voltage along low-voltage distributing line segmentation switching capacitance according to claim 1, is characterized by: the JKWN/H type controller that electric energy quality monitoring control device controller, electric capacity automatic switching device use Beihai Shenlan Science and Technology Development Co., Ltd. to produce.
3. a Ju a kind of device promoting terminal voltage along low-voltage distributing line segmentation switching capacitance according to claim 1, it is characterized by: have a grade reactive power compensation to mend capacitor altogether, use the self-recovery low-voltage parallel capacitor that Guilin Power Capacitor Co., Ltd. produces, select model to be BGWJ-0.45-30-3, power is 30kvar.
4. a Ju a kind of device promoting terminal voltage along low-voltage distributing line segmentation switching capacitance according to claim 1, it is characterized by: the combination switch that capacitor fling-cut switch uses Beihai Shenlan Science and Technology Development Co., Ltd. to produce, select model to be SLFK-H/ △ 380V55A.
5. a Ju a kind of device promoting terminal voltage along low-voltage distributing line segmentation switching capacitance according to claim 1, it is characterized by: have grade reactive power compensation A, B, C phase point benefit capacitor, use the self-recovery low-voltage parallel capacitor that Guilin Power Capacitor Co., Ltd. produces, select model to be BGWJ-0.45-30-3YN, power is 3 × 10kvar.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521081837.XU CN205178512U (en) | 2015-12-15 | 2015-12-15 | Terminal voltage's device is promoted along low pressure distribution lines segmentation switching electric capacity |
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|---|---|---|---|
| CN201521081837.XU CN205178512U (en) | 2015-12-15 | 2015-12-15 | Terminal voltage's device is promoted along low pressure distribution lines segmentation switching electric capacity |
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| CN205178512U true CN205178512U (en) | 2016-04-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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2015
- 2015-12-15 CN CN201521081837.XU patent/CN205178512U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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