CN204103491U - The rural power grids branch line terminal voltage intelligent optimization bascule of built-in ARM chip - Google Patents
The rural power grids branch line terminal voltage intelligent optimization bascule of built-in ARM chip Download PDFInfo
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- CN204103491U CN204103491U CN201420396337.4U CN201420396337U CN204103491U CN 204103491 U CN204103491 U CN 204103491U CN 201420396337 U CN201420396337 U CN 201420396337U CN 204103491 U CN204103491 U CN 204103491U
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The utility model discloses a kind of rural power grids branch line terminal voltage intelligent optimization bascule of built-in ARM chip, be installed on branch line end, this device comprises built-in ARM chip and comes the composite sync switch (1) of adjusted in concert resistance, electric capacity and inductance, the intelligently encoding switch (2) of built-in ARM chip and IGBT idle compensating control (3).The multiple functions such as this device can be used for the rural power grids branch line end of power supply quality difference, spread of voltage, three-phase imbalance, can complete voltage optimization, active balance active power and reactive power, adjustment three-phase equilibrium.When not increasing 10kV circuit, do not newly increase distribution transformer, when not transforming low-voltage circuit, by active power phase shift technology+local reactive power compensation technology+overcompensation combine with technique is used, reach promote low-voltage, object that three-phase equilibrium is optimized, the effective problem solving the defective and three-phase imbalance of terminal voltage in Distribution Transformer in Rural Area platform district low-voltage circuit.
Description
Technical field
The utility model relates to intelligent power distribution field, particularly a kind of rural power grids branch line terminal voltage intelligent optimization bascule of built-in ARM chip.
Background technology
Along with new countryside construction, farmer's income level improve, household electrical appliances go to the countryside the release of policy, it is also more and more outstanding to there is underproof problem in the quality of voltage of traditional countryside electrical network, especially when villager concentrates use 220V individual event to power, problem is more outstanding, the impact brought the household electricity of urban residents is also increasing, but electric power enterprise is unable takes out a large amount of funds and solve this problem.Especially to cause backend user can not the platform district of normal electricity consumption because circuit is oversize for some, in period peak times of power consumption, terminal temperature difference individual event voltage may be low to moderate 110 ~ 150V, now can not ensure user's basic electricity demand, as illumination, sees TV, startup water pumper and rice mill etc.
Domesticly at present one or more means following are mainly taked to solve for rural power grids branch line end low-voltage problem:
A, transformation platform district low-voltage circuit, change the wire of larger wire diameter into, or single phase power supply made into three-phase four power supply processed by wire less for cross section.
B, extension 10kV circuit, newly-increased distribution transformer.
C, install low-voltage reactive compensator capable, this is to when in low-voltage platform area, inductive load is heavier, as draw water peak of power consumption time, drop into reactive power compensator in good time, exactly, put forward high-tension effect comparatively obvious; As in low-voltage platform area with resistive load for time main, effect is just not obvious.
The voltage branch point position of D, adjustment distribution transformer, but when load is light, head end voltage can be caused higher.
The degree of balance of E, raising three-phase load.
Summary of the invention
In order to when limited fund, resolving low-voltage that rural area also exists at present this relate to the problem improving urban residents' quality of life progressively, the utility model provides a kind of rural power grids branch line terminal voltage intelligent optimization bascule of built-in ARM chip, realizes the intelligent power distribution of the optimization of rural power grids branch line terminal voltage and three-phase imbalance adjustment by alternate gaining merit with idle intelligent transfer techniques; The utility model can when not increasing 10kV circuit, do not newly increase distribution transformer, when not transforming low-voltage circuit, the problem of the defective and three-phase imbalance of end three-phase/individual event voltage in effective solution Distribution Transformer in Rural Area platform district low-voltage circuit is a kind of comparatively economic approach solving rural power grids end three-phase/individual event brownout and three-phase imbalance.
For achieving the above object, the utility model provides following technical scheme:
A kind of rural power grids branch line terminal voltage intelligent optimization bascule of built-in ARM chip, be installed on branch line end, this device comprises built-in ARM chip and comes the composite sync switch (1) of adjusted in concert resistance, electric capacity and inductance, the intelligently encoding switch (2) of built-in ARM chip and IGBT idle compensating control (3).
Described built-in ARM chip is connected with IGBT idle compensating control (3) after coming the composite sync switch (1) of adjusted in concert resistance, electric capacity and inductance and intelligently encoding switch (2) parallel connection of built-in ARM chip, and forms loop.
As further program of the utility model: the composite sync switch (1) that described built-in ARM chip comes adjusted in concert resistance, electric capacity and inductance regulates the realization of the resistance of cross-over connection between two-phase idle in two alternate transfers by built-in ARM chip.
As further program of the utility model: the composite sync switch (1) that described built-in ARM chip comes adjusted in concert resistance, electric capacity and inductance regulates the inductance of cross-over connection between two-phase or electric capacity to realize in two alternate transfer active power by built-in ARM chip.
As further program of the utility model: the marshalling of the resistance of needs, electric capacity and inductance element intelligence is connected on different phase lines between zero line by built-in ARM chip by the intelligently encoding switch (2) of described built-in ARM chip, can offset neutral line current.
As further program of the utility model: described IGBT idle compensating control (3) is by the monitoring to change in voltage, and in good time switching reactive power compensation, forms effective compensation to voltage.
Compared with prior art, the utility model beneficial effect is: the rural power grids branch line end that can be used for power supply quality difference, spread of voltage, three-phase imbalance, voltage optimization (as required boosting or step-down) can be completed, active balance active power and reactive power, the multiple functions such as adjustment three-phase equilibrium.The rate of qualified voltage of rural power grids branch line end can be increased substantially, ensure good power supply quality, when not increasing 10kV circuit, do not newly increase distribution transformer, when not transforming low-voltage circuit, by active power phase shift technology+local reactive power compensation technology+overcompensation combine with technique is used, reach promote low-voltage, object that three-phase equilibrium is optimized, the effective problem solving the defective and three-phase imbalance of terminal voltage in Distribution Transformer in Rural Area platform district low-voltage circuit.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms a application's part, does not form restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the principle of device schematic diagram of two-phase span connecting resistance;
Fig. 2 is the principle of device schematic diagram of flying capcitor between two-phase;
Fig. 3 is the principle of device schematic diagram of cross-over connection inductance between two-phase;
Fig. 4 utilizes reactive power compensation to the schematic diagram of voltage double optimization;
Fig. 5 is theory diagram of the present utility model.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly understand, be further described of the present utility model below in conjunction with mount scheme.At this, exemplary embodiment of the present utility model and illustrating for explaining the utility model, but not as to restriction of the present utility model.
a rural power grids branch line terminal voltage intelligent optimization bascule for built-in ARM chip, comprising:
1) built-in ARM chip carrys out the composite sync switch (1) of adjusted in concert resistance, electric capacity and inductance;
1.1) it is idle in two alternate transfers that the composite sync switch (1) that this built-in ARM chip comes adjusted in concert resistance, electric capacity and inductance regulates the resistance of cross-over connection between two-phase to realize by built-in ARM chip; Its operation principle is as shown in Figure 1:
Resistance R in Fig. 1 is connected across between A phase with B phase, and resistance R two ends are line voltage.From A phase, the electric current of resistance is Ira, Ira and line voltage U ab same-phase, advanced A phase voltage Ua 30 °, and Ira can resolve into two parts, and a part is the capacity current Iac of advanced Ua 90 °, and a part is the active current Iar identical with Ua direction.From B phase, the electric current of resistance is Irb, Irb and line voltage U ba same-phase, delayed B phase voltage Ub 30 °, and Ibr can resolve into two parts, and a part is the inductance current IbL of delayed Ub 90 °, and a part is the active current Ibr identical with Ub direction.Thus can determine that resistance R has transferred to B phase by idle for a part for A phase, so A is phase-changed into capacitive, B is phase-changed into perception.
Therefore we can say, cross-over connection resistance between A phase with B phase, not only occurs active current in A phase and B phase, and can by a part of reactive current from A phase transfer to B phase.
1.2) the composite sync switch (1) that this built-in ARM chip comes adjusted in concert resistance, electric capacity and inductance regulates the inductance of cross-over connection between two-phase or electric capacity to realize in two alternate transfer active power by built-in ARM chip; Its operation principle is as shown in Figures 2 and 3:
Electric capacity C in Fig. 2 is connected across between A phase with B phase, and electric capacity C two ends are line voltage.From A phase, the advanced line voltage U ab of electric current I ca 90 ° of electric capacity C, Ica can resolve into two parts, and a part is the capacity current Iac of advanced Ua 90 °, and a part is the active current Iar contrary with Ua direction, means that the active current of A phase reduces.From B phase, the advanced line voltage U ba of electric current I cb 90 ° of electric capacity C, Icb can resolve into two parts, and a part is the capacity current Ibc of advanced Ub 90 °, and a part is the active current Ibr identical with Ub direction, means that the active current of B phase increases.Therefore we can say, flying capcitor between A phase with B phase, not only occur capacitive reactive power electric current in A phase and B phase, and can by a part of active current from A phase transfer to B phase.
Inductance in Fig. 3 can be gained merit in two alternate transfers, and inductance L is connected across between A phase with B phase, and inductance L two ends are line voltage.From A phase, the delayed line voltage U ab of electric current I La 90 ° of inductance L, ILa can resolve into two parts, and a part is the inductance current IaL of delayed Ua 90 °, and a part is the active current Iar identical with Ua direction, means that the active current of A phase increases.From B phase, the delayed line voltage U ba of electric current I Lb 90 ° of inductance L, ILb can resolve into two parts, and a part is the inductance current IbL of delayed Ub 90 °, and a part is the active current Ibr contrary with Ub direction, means that the active current of B phase reduces.Therefore we can say, cross-over connection inductance between A phase with B phase, not only occurs perceptual reactive current in A phase and B phase, and can by a part of active current from B phase transfer to A phase.
2) the intelligently encoding switch (2) of built-in ARM chip, the marshalling of the resistance of needs, electric capacity and inductance element intelligence is connected on different phase lines between zero line by built-in ARM chip by it, can offset neutral line current.No matter what situation load is, the neutral line current vector that to be exactly angle be between 0 ~ 360 °, offset neutral line current just needs a vector contrary with its equal and opposite in direction direction.
If A phase voltage vector is 0 ° of direction, B phase voltage vector is 120 ° of directions, and C phase voltage vector is 240 ° of directions.When use two resistance, if resistance 1 being connected on resistance 2 between A phase with zero line is connected between B phase and zero line, due to electric current and the arc in phase of resistance, therefore resistance 1 produces the current vector in 0 ° of direction, resistance 2 produces the current vector in 120 ° of directions, according to plane vector Local Theorem 1: the resistance selecting these two resistance, then can synthesize any current vector in 0 ~ 120 ° of direction, therefore can be used for the neutral line current in counteracting 180 ~ 300 ° of directions.If resistance 1 being connected on resistance 2 between B phase with zero line is connected between C phase and zero line, then select the resistance of these two resistance can synthesize any current vector in 120 ~ 240 ° of directions, therefore can be used for the neutral line current in counteracting 300 ~ 60 ° of directions.If resistance 1 being connected on resistance 2 between C phase with zero line is connected between A phase and zero line, then select the resistance of these two resistance can synthesize any current vector in 240 ~ 0 ° of directions, therefore can be used for the neutral line current in counteracting 60 ~ 180 ° of directions.Therefore, the value of selected two resistance is appropriately adjusted by the composite sync switch (1) of built-in ARM chip, and by these two resistance by the intelligently encoding switch (2) of built-in ARM chip appropriate be connected on different phase lines between zero line, namely can offset neutral line current.
When use two electric capacity, if electric capacity 1 being connected on electric capacity 2 between A phase with zero line is connected between B phase and zero line, due to the electric current leading voltage 90 ° of electric capacity, therefore electric capacity 1 produces the current vector in 270 ° of directions, electric capacity 2 produces the current vector in 30 ° of directions, according to plane vector Local Theorem 1: the capacity selecting these two electric capacity, then can synthesize any current vector in 270 ~ 30 ° of directions, therefore can be used for the neutral line current in counteracting 90 ~ 210 ° of directions.If electric capacity 1 being connected on electric capacity 2 between B phase with zero line is connected between C phase and zero line, then select the capacity of these two electric capacity can synthesize any current vector in 30 ~ 150 ° of directions, therefore can be used for the neutral line current in counteracting 210 ~ 330 ° of directions.If electric capacity 1 being connected on electric capacity 2 between C phase with zero line is connected between A phase and zero line, then select the capacity of these two electric capacity can synthesize any current vector in 150 ~ 270 ° of directions, therefore can be used for the neutral line current in counteracting 330 ~ 90 ° of directions.Therefore, the capacity of selection two electric capacity adjusted by the composite sync switch (1) of built-in ARM chip, and by these two electric capacity by the intelligently encoding switch (2) of built-in ARM chip appropriate be connected on different phase lines between zero line, namely can offset neutral line current.
3) IGBT idle compensating control (3), it is by the monitoring to change in voltage, in good time switching reactive power compensation, and form effective compensation to voltage, when concentrated electric load is directly powered from power circuit, typical wiring and vectogram are as Fig. 4:
The simplification of line electricity pressure drop △ U calculates such as formula (1-1).
When not having reactive power compensator, line voltage distribution reduces to △ U
1:
△U
1=(PR+QX)/U（1-1）
In formula: P, Q are respectively load and gain merit and reactive power; R, X are respectively equivalent line resistance and reactance; U is circuit rated voltage.
Reactive power compensator Q is installed
cafter, line voltage distribution reduces to △ U
2
△U
2=(PR+(Q-Q
C)X)/U （1-2）
Obvious U
2<U
1, generally, because of X>>R, QX>>PR, therefore reactive power compensator Q is installed
cafter, cause the steady state voltage of bus raise be:
△U=△U
1－△U
2= Q
CX/U （1-3）
If compensation arrangement junction bus three-phase shortcircuit capacity is S
k, then X=U
2/ S
k, in substitution:
△U/U= Q
C / S
K（1-4）
In formula: the voltage lift-off value of △ U-input parallel capacitor device, kV;
Busbar voltage when U-parallel capacitor device does not drop into, kV;
Q
c-parallel capacitor device capacity, MVAR;
S
k-parallel capacitor device junction bus three-phase shortcircuit capacity, MVA.
From above formula, Q
clarger, S
kless, △ U is larger, and effect of namely boosting is more remarkable, and with the active power of load, reactive power relation is little.Therefore more close to line end, system short circuit capacity S
kless occasion, the effect of installing parallel capacitor device is more remarkable.Statistics shows, utilization voltage raises 1%, on average can increase production 0.5%; Line voltage raises 1%, and transmitting and transforming equipment capacity can be made to increase by 1.5%, reduces line and throws 2%; Generator voltage raises 1%, can excavate power supply and export 1%.
4) data and group-net communication module (4) is sent a duplicate to for long-range, this part is prior art, it receives the data processed result of data acquisition module and raw sensory data and by network, signal is passed out to handheld computer and carries out pair analysis and exception/fault diagnosis to data, forms report.
Core of the present utility model is: regulated the elements such as alternate resistance, electric capacity, inductance to realize alternate meritorious and idle intelligence transfer by ARM chip intelligent, rural power grids branch line end three-phase/individual event voltage optimization and three-phase imbalance are regulated, when not increasing 10kV circuit, do not newly increase distribution transformer, when not transforming low-voltage circuit, the problem of the defective and three-phase imbalance of end three-phase/individual event voltage in effective solution Distribution Transformer in Rural Area platform district low-voltage circuit, effectively supplementing as existing low-voltage solution.
Installation Considerations: traditional three-phase imbalance adjusting device is generally installed on transformer side, not branch line end, and this device must be installed on branch line end.
Mount scheme 1: to cause backend user can not the platform district of normal electricity consumption because circuit is oversize for some, in period peak times of power consumption, terminal temperature difference voltage may be low to moderate 110 ~ 150V, now can not ensure user's basic electricity demand, as illumination, sees TV, startup water pumper and rice mill etc.For this situation, the position that peak period voltage is 140 ~ 160V can be arranged on by of the present utility model, after boosting of the present utility model, the voltage of this position can be brought up to 200 ~ 230V by 140 original ~ 160V, line end voltage also can bring up to 170 ~ 210V from 110 original ~ 150V, and then ensure that the basic household electrical appliance of user can normally use in peak times of power consumption.
Mount scheme 2: be not very long for circuit after the upgrading of rural power grids, but the reason such as new Electronating device is more, make line load strengthen, cause terminal temperature difference peak times of power consumption voltage be only 160 ~ 190V, make power quality deviation, rate of qualified voltage reduction.For this situation, the utility model can be arranged on the place of voltage lower than qualified voltage 198V, as the point between 180 ~ 198V is installed, after boosting of the present utility model, voltage can be risen to 230V, ensure the power quality of terminal temperature difference and improve rate of qualified voltage.
Above-described embodiment; that further detailed description has been done to the purpose of this utility model, technical scheme, range of application and beneficial effect; be only embodiment of the present utility model; and be not used in restriction protection range of the present utility model; all within spirit of the present utility model and principle; any amendment of doing, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (1)
1. the rural power grids branch line terminal voltage intelligent optimization bascule of a built-in ARM chip, it is characterized in that, be installed on branch line end, this device comprises built-in ARM chip and comes the composite sync switch (1) of adjusted in concert resistance, electric capacity and inductance, the intelligently encoding switch (2) of built-in ARM chip and IGBT idle compensating control (3);
Described built-in ARM chip is connected with IGBT idle compensating control (3) after coming the composite sync switch (1) of adjusted in concert resistance, electric capacity and inductance and intelligently encoding switch (2) parallel connection of built-in ARM chip, and forms loop;
The composite sync switch (1) that described built-in ARM chip comes adjusted in concert resistance, electric capacity and inductance regulates the realization of the resistance of cross-over connection between two-phase idle in two alternate transfers by built-in ARM chip;
The composite sync switch (1) that described built-in ARM chip comes adjusted in concert resistance, electric capacity and inductance regulates the inductance of cross-over connection between two-phase or electric capacity to realize in two alternate transfer active power by built-in ARM chip;
The marshalling of the resistance of needs, electric capacity and inductance element intelligence is connected on different phase lines between zero line by built-in ARM chip by the intelligently encoding switch (2) of described built-in ARM chip, can offset neutral line current;
Described IGBT idle compensating control (3) is by the monitoring to change in voltage, and in good time switching reactive power compensation, forms effective compensation to voltage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420396337.4U CN204103491U (en) | 2014-04-14 | 2014-07-18 | The rural power grids branch line terminal voltage intelligent optimization bascule of built-in ARM chip |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420175768.8 | 2014-04-14 | ||
| CN201420175768 | 2014-04-14 | ||
| CN201420396337.4U CN204103491U (en) | 2014-04-14 | 2014-07-18 | The rural power grids branch line terminal voltage intelligent optimization bascule of built-in ARM chip |
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|---|---|
| CN204103491U true CN204103491U (en) | 2015-01-14 |
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ID=52271892
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111555301A (en) * | 2020-05-26 | 2020-08-18 | 上海广吉电气有限公司 | Intelligent active filter and reactive power phase shifter |
| CN111600312A (en) * | 2020-05-09 | 2020-08-28 | 青岛鼎信通讯股份有限公司 | Power supply station area terminal low-voltage distributed treatment method based on reactive compensation |
-
2014
- 2014-07-18 CN CN201420396337.4U patent/CN204103491U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111600312A (en) * | 2020-05-09 | 2020-08-28 | 青岛鼎信通讯股份有限公司 | Power supply station area terminal low-voltage distributed treatment method based on reactive compensation |
| CN111555301A (en) * | 2020-05-26 | 2020-08-18 | 上海广吉电气有限公司 | Intelligent active filter and reactive power phase shifter |
| CN111555301B (en) * | 2020-05-26 | 2021-11-09 | 上海广吉电气有限公司 | Intelligent active filter and reactive power phase shifter |
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