CN105406493A - Low voltage three-phase load balancing control method based on on-load commutation technology - Google Patents
Low voltage three-phase load balancing control method based on on-load commutation technology Download PDFInfo
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Abstract
The invention discloses a low voltage three-phase load balancing control method based on the on-load commutation technology. According to the method, each outgoing topology structure at a low voltage side of a distribution transformer on an outgoing wire is taken as a model, a control load capacity and a switch position of a commutation switch on the outgoing wire are acquired, a three-phase load unbalancing degree is detected and calculated in real time, if the three-phase load unbalancing degree surpasses a given value, an adjustment-needing load is calculated through a mean value iterative method, a motion-needing commutation switch number and a commutation switch adjustment phase sequence are acquired through utilizing the multi-target optimization principle, and three-phase load balancing is realized. According to the method, factors such as the switch motion frequency and the three-phase load unbalancing degree are fully considered, when the three-phase load unbalancing degree is guaranteed to reach a standard value scope, the smallest switch motion frequency and the lowest commutation cost are realized, moreover, uninterrupted user power supply requirements are realized during load transfer, namely the on-load commutation technology.
Description
Technical field
The present invention relates generally to power distribution network low-voltage circuit three-phrase burden balance and controls, and based on three-phrase burden balance theory of algorithm, realizing load has a year commutation, belongs to control technology field.
Background technology
In the city dweller and countryside low-voltage electric distribution network of three-phase four-wire system, user mostly is single-phase load or single three-phase load is used with, asymmetric due to the unbalanced of load and system component parameter, three alternate objective ubiquities of unsymmetrical current.Simultaneously the irregularities of customer charge unbalance condition and unpredictability, cause the imbalance of low-voltage network threephase load chronicity.GB/T15543-2008 " quality of power supply three-phase voltage allows degree of unbalance " clear stipulaties, the tri-phase unbalance factor of electrical network negative sequence voltage is not more than 2% under normal circumstances, is no more than 4% in short-term; The negative sequence voltage degree of unbalance that each user causes at points of common connection more than 1.3%, must not be no more than 2.6% in short-term.Three-phase imbalance will cause the additional heating of electric rotating machine and vibration, and stray transformer flux increases and local overheating, and grid line loss increases and multiple protection and automatics malfunction etc.According to statistics; there is the low-voltage platform area existence three-phase imbalance situation in various degree more than 85% in the current whole nation; as far as possible reasonably effective solution almost not being had except distribution load except utilizing experience to this power department, the potential safety hazard that some bring to reduce the excessive imbalance of three-phase as increased the safeguard measures such as neutral line cross section can only being taked.
Tradition adjustment three load unbalanced methods are the data according to " distribution transformer platform area circuit single-phase load distribution condition table ", with reference to low-voltage platform area electricity account nearly half a year, according to branched line adjustment platform district user distribution after Xian Tai district end, realize three-phrase burden balance.Large along line adjustment workload, efficiency is low; Have a power failure and affect user's normal electricity consumption, cause power supply enterprise's economic loss.
For the unbalanced situation of low voltage three-phase, domestic and international many producers develop three-phase imbalance and adjust benefit device, all adopt capacitor to adjust and mend principle.This product category is various, and its operation principle is similar.Such as have to adjust and mend the power capacitor of device built with 12 single-phase 400V, every platform capacitor, under the control of control terminal, both can be connected between phase line and phase line, also can be connected between phase line and zero line; Both can realize dihedral electric capacity entirely to throw, also can entirely throw by star connection electric capacity.The electric capacity often organizing dihedral and star connection has 5 kinds of different connections: 1. electric capacity is thrown entirely; 2. electric capacity is not thrown entirely; 3. the alternate throwing of A, B one group; 4. the alternate throwing of B, C one group; 5. the alternate throwing of A, C one group; Have 2 groups of dihedrals and 2 groups of star-star connection modes in this device, have 625 kinds of switching modes according to the method for permutation and combination; And for the distribution transforming of different capabilities, Capacitor banks can increase or reduce Capacitor banks.By rightly between phase and phase and each mutually and between zero line, access the method for varying number capacitor, make use of the awareness character of load, achieve the object adjusting uneven active current while compensation power factor, its compensation rate finally dropped into is identical with the reactive power compensation amount of system actual needs.
And device mended in the idle tune of relevant manufacturers research and development, because the inductive load operating condition in low-voltage network is complicated and changeable, make relatively-stationary capacitor compensation be difficult to reach ideal effect, also often cause the problem of reactive power releasing system, saving energy and decreasing loss effect is not obvious.On the other hand, in traditional SVC, TCR branch road adopts 6 pulsation connection types, containing 6k ± 1 subharmonic (k is positive integer) in its line current, needs to install filter additional, adds cost.According to STATCOM technology advanced at present, cost is too high, adopts unreasonable in low-pressure system.3rd aspect, benefit device is adjusted only to tell at the mains side of installation site, and this product is generally arranged on distribution transforming outlet, there is huge potential faults and fall the low-voltage circuit damaging space and then there is no effect, therefore there is significant limitation in this method, is not the development trend that three-phase imbalance administers direction research.
1. administer for three-phase imbalance and there is much technical and economical problems:
2. low-pressure side load has randomness and dynamic, and load has obvious asymmetry, is difficult to Accurate Prediction;
3. switched capacitor mode compensate three load unbalanced, capacitor switching is frequent, and useful life is short;
4.SVC has constant-resistance resistance, and produce harmonic current, compensation ability is limited; Advanced SVG complex structure, cost is high, maintenance is inconvenient, but both to improve imbalance limited in one's ability, be mainly used in reactive power compensation;
In sum, realize three-phrase burden balance by reactive power compensation comparatively difficult, and economy is not high.And traditional Load adjustment balance method, can not meet the needs of the safe and reliable electricity consumption of active user.How to utilize the balanced low-voltage load of reversing arrangement, realize the main research that low-voltage platform area three-phrase burden balance operation is this patent.
Summary of the invention
For the deficiency that prior art exists, the present invention seeks to be to provide a kind of based on there being three, the low-voltage distribution transformer platform district load balancing control method of carrying reverse flow technique, solve idle tune and mend the no thoroughness that device administers three-phase imbalance, with the least number of times that commutates for constraints, utilize change over switch device to adjust power load distributing situation in triple line, economical and efficient to realize low-pressure side three-phase load balanced.
To achieve these goals, the present invention realizes by the following technical solutions:
Based on there being low pressure three load balancing control methods of carrying reverse flow technique, comprising:
(1) topology data and load data is read; Return back out line topological structure for model with one of low-voltage platform area, gather the position of the real-time running data of each monitoring point, meter data and reversing switch;
(2) three-phase load unbalance degree is calculated; Three-phase load unbalance degree is detected in real time, and with calculate, can accurate Calculation three-phase four-wire system, three-phase three-line system tri-phase unbalance factor.
(3) judge whether three-phase load unbalance degree exceeds set-point, if exceed set-point, then calculated the load needing adjustment by mean iterative method, enter step (4); Otherwise then terminate, namely three-phase load unbalance degree reaches in standard value range;
(4) judge whether iterations is greater than N, wherein N is set point, and iterations is on-load switch number; If be not more than N, then continue through mean iterative method and calculate, perform commutation command, reversing switch adjustment be converted to and carried commutation control instruction, iterations returns step (1) for n+1 time;
Once, a reversing switch once commutates (do not commutate during iteration, iteration terminates rear commutation) iteration, and iterations is determined by three-phase imbalance rate, when three-phase imbalance rate is less than set-point, stops iteration; Iterations maximum is this branch road reversing switch number.
If be greater than N, then calculated the load needing adjustment by mean iterative method, then multiple-objection optimization principle draws the phase sequence of reversing switch number and the reversing switch adjustment needing action, selects optimum phase sequence adjustment result, realizes three-phrase burden balance.
A kind of low pressure of the present invention three load balancing control methods, comprise the tri-phase unbalance factor calculation procedure that CIGER recommends.Its feature is: can accurate Calculation three-phase four-wire system, three-phase three-line system tri-phase unbalance factor.
A kind of low pressure of the present invention three load balancing control methods, comprise three the load balancing models built based on mean value iterative method, its feature is: take reversing switch as computing unit, with phase sequence residing for switch and control load set up computation model for variable.
A kind of low pressure of the present invention three load balancing control methods, comprise mean value iterative algorithm and realize and the adjustment of reversing switch phase sequence.Its feature is: in limited iterations, by calculating phase sequence adjustment result, realizes maximizing three-phrase burden balance.
A kind of low pressure of the present invention three load balancing control methods, comprise and select multiple-objection optimization phase sequence adjustment result.Its feature is: consider commutation number of times and three-phase load unbalance degree, selects optimum phase sequence adjustment result.
A kind of low pressure of the present invention three load balancing control methods, comprise and reversing switch adjustment have been converted to a year commutation control instruction.
Of the present invention a kind of based on there being low pressure three load balancing control methods of carrying reverse flow technique have the following advantages and give prominence to effect: the topological structure Modling model often returning back out line according to low-voltage platform area, with reversing switch in outlet for node.
The present invention often returns back out line for model with distribution transformer low-pressure side, gather and often return back out load that reversing switch is controlled and the position of the switch on line, real-time detection computations is carried out to three-phase load unbalance degree, if tri-phase unbalance factor exceeds set-point, the load needing adjustment is calculated by mean iterative method, then multiple-objection optimization principle draws the phase sequence of reversing switch number and the reversing switch adjustment needing action, realizes three-phrase burden balance.This algorithm has taken into full account the factors such as switch motion number of times, tri-phase unbalance factor, reach in standard value range at guarantee three load unbalanced degree, realize switch motion least number of times, commutation cost is minimum, simultaneously, realize the requirement of load transfer plan user uninterrupted power supply, namely have and carry reverse flow technique, solve idle tune and mend the no thoroughness that device administers three-phase imbalance, with the least number of times that commutates for constraints, utilize change over switch device to adjust power load distributing situation in triple line, economical and efficient to realize low-pressure side three-phase load balanced.Based on distributed, the multilayered structure of low-voltage three-phase load, utilize mean value iterative method to build three-phase load unbalance Optimized model, upgrade the power load distributing in A, B, C, triple line by loop iteration, realize load equalization in triple line.
Accompanying drawing explanation
The present invention is described in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is the topology diagram that low-voltage platform area one of the present invention returns back out line;
Fig. 2 is flow chart of the present invention;
Fig. 3 is mean value iterative method calculation flow chart of the present invention.
Embodiment
The technological means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
See Fig. 1-Fig. 3, a kind of low pressure three load balancing control methods based on there being year reverse flow technique of the present embodiment, line is often returned back out for model with distribution transformer low-pressure side, gather and often return back out load that reversing switch is controlled and the position of the switch on line, real-time detection computations is carried out to three-phase load unbalance degree, if tri-phase unbalance factor exceeds set-point, the load needing adjustment is calculated by mean iterative method, then multiple-objection optimization principle draws the phase sequence of reversing switch number and the reversing switch adjustment needing action, realizes three-phrase burden balance.This algorithm has taken into full account the factors such as switch motion number of times, tri-phase unbalance factor, reach in standard value range at guarantee three load unbalanced degree, realize switch motion least number of times, commutation cost is minimum, simultaneously, realize the requirement of load transfer plan user uninterrupted power supply, namely have and carry reverse flow technique, solve idle tune and mend the no thoroughness that device administers three-phase imbalance, with the least number of times that commutates for constraints, utilize change over switch device to adjust power load distributing situation in triple line, economical and efficient to realize low-pressure side three-phase load balanced.
For introducing the present invention in detail, its concrete steps are as follows:
(1) topology data and load data is read; Return back out line topological structure for model with one of low-voltage platform area, gather the position of the real-time running data of each monitoring point, meter data and reversing switch;
(2) three-phase load unbalance degree is calculated; Three-phase load unbalance degree is detected in real time, and with calculate, can accurate Calculation three-phase four-wire system, three-phase three-line system tri-phase unbalance factor.The step calculating tri-phase unbalance factor is as follows:
Three-phase imbalance degree is represented, namely with zero line average load electric current and three-phase load total current ratio
Wherein, I
athe A phase load electric current represented, I
bfor B phase load electric current, I
cfor C phase load electric current, the appropriate expression formula of load current and zero line load current is
neutral line current size is
Three-phase load unbalance degree represents with three-phase current size form, as follows
(3) judge whether three-phase load unbalance degree exceeds set-point, if exceed set-point, then calculated the load needing adjustment by mean iterative method, enter step (4); Otherwise then terminate, namely three-phase load unbalance degree reaches in standard value range;
Based on there being low pressure three load balancing control methods of carrying reverse flow technique, comprising:
(1) topology data and load data is read; Return back out line topological structure for model with one of low-voltage platform area, gather the position of the real-time running data of each monitoring point, meter data and reversing switch;
(2) three-phase load unbalance degree is calculated; Three-phase load unbalance degree is detected in real time, and with calculate, can accurate Calculation three-phase four-wire system, three-phase three-line system tri-phase unbalance factor.
(3) judge whether three-phase load unbalance degree exceeds set-point, if exceed set-point, then calculated the load needing adjustment by mean iterative method, enter step (4); Otherwise then terminate, namely three-phase load unbalance degree reaches in standard value range;
Because the computational methods of degree of unbalance are different, its uneven set-point can not according in specification given 2%.According to regulation in " overhead distribution and equipment operating standard ", neutral current should not exceed 25% of rated current.The unbalanced value calculating this kind of method is thus about 10%.
(4) judge whether iterations is greater than N, wherein N is set point, and iterations is on-load switch number; If be not more than N, then continue through mean iterative method and calculate, perform commutation command, reversing switch adjustment be converted to and carried commutation control instruction, iterations returns step (1) for n+1 time;
Once, a reversing switch once commutates (do not commutate during iteration, iteration terminates rear commutation) iteration, and iterations is determined by three-phase imbalance rate, when three-phase imbalance rate is less than set-point, stops iteration; Iterations maximum is this branch road reversing switch number.
If be greater than N, then calculated the load needing adjustment by mean iterative method, then multiple-objection optimization principle draws the phase sequence of reversing switch number and the reversing switch adjustment needing action, selects optimum phase sequence adjustment result, realizes three-phrase burden balance.
A kind of low pressure of the present invention three load balancing control methods, comprise CIGER recommend tri-phase unbalance factor calculation procedure, can accurate Calculation three-phase four-wire system, three-phase three-line system tri-phase unbalance factor.And comprise three the load balancing models built based on mean value iterative method, take reversing switch as computing unit, with phase sequence residing for switch and control load set up computation model for variable.
Mean value iterative algorithm of the present invention realizes and the adjustment of reversing switch phase sequence, in limited iterations, by calculating phase sequence adjustment result, realizes maximizing three-phrase burden balance; It adopts selects multiple-objection optimization phase sequence adjustment result, considers commutation number of times and three-phase load unbalance degree, selects optimum phase sequence adjustment result.
In addition, reversing switch adjustment has been converted to and has carried commutation control instruction by the present invention, often returns back out the topological structure Modling model of line, with reversing switch in outlet for node according to low-voltage platform area.
The present invention is based on distributed, the multilayered structure of low-voltage three-phase load, utilize mean value iterative method to build three-phase load unbalance Optimized model, upgrade the power load distributing in A, B, C, triple line by loop iteration, realize load equalization in triple line.
See Fig. 3, mean value iterative method computational methods of the present invention are: first according to measurement data, calculate every current value, and this every current value computing formula is:
I
φ=sum (I
φ t), φ is a phase in ABC three-phase, and t represents the reversing switch being numbered t in φ phase, I
φ tbe the size of current that in φ phase, t numbering device controls; Select current best value I
Φ max, I
Φ min=find (sum (I
Φ t));
Finally calculate the position needing reversing switch, this computing formula is:
Wherein, I
n Δthe electric current of maximal phase and the difference of mean value in three-phase current during n-th iteration.φ represents the phase that t reversing switch should change, the phase that namely in three-phase, current value is minimum; I
φ nmaxthe current value of the phase that electric current is maximum in three-phase when being n-th iteration.I
navethe mean value of three-phase current.
Of the present invention a kind of based on there being low pressure three load balancing control methods of carrying reverse flow technique have the following advantages and give prominence to effect: the topological structure Modling model often returning back out line according to low-voltage platform area, calculate tri-phase unbalance factor, with reversing switch in outlet for node carries out load transfer plan; Realize reversing switch action frequency by mean value alternative manner minimum, customer power supply is uninterrupted, improves power supply safety reliability, reduces the line loss that three characteristics of the middle term imbalance causes.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (5)
1., based on there being low pressure three load balancing control methods of carrying reverse flow technique, it is characterized in that, its method step is as follows:
(1) topology data and load data is read; Often return back out line topological structure for model with low-voltage platform area, with reversing switch in outlet for node, gather the position of the real-time running data of each monitoring point, meter data and reversing switch;
(2) three-phase load unbalance degree is calculated; Three-phase load unbalance degree δ is detected in real time, and to calculate;
(3) judge whether three-phase load unbalance degree exceeds set-point, if exceed set-point, then calculated the load needing adjustment by mean iterative method, enter step (4); Otherwise then terminate, namely three-phase load unbalance degree reaches in standard value range.
(4) optimum phase sequence adjustment result is selected; In limited iterations, reversing switch adjustment is converted to and has carried commutation control instruction, the load of adjustment is gone out to need by mean iterative method Continuous plus, then show that optimum needs the reversing switch number of action and the phase sequence of reversing switch adjustment according to multiple-objection optimization principle, realize maximizing three-phrase burden balance.
2. low pressure according to claim 1 three load balancing control methods, is characterized in that, in described step (2), the step calculating tri-phase unbalance factor is as follows:
Three-phase imbalance degree is represented, namely with zero line average load electric current and three-phase load total current ratio
Wherein, I
athe A phase load electric current represented, I
bfor B phase load electric current, I
cfor C phase load electric current, the appropriate expression formula of load current and zero line load current is
neutral line current size is
Three-phase load unbalance degree represents with three-phase current size form, as follows
3. low pressure according to claim 1 three load balancing control methods, it is characterized in that, in described step (4), first be three the load balancing models built based on mean value iterative method, take reversing switch as computing unit, with phase sequence residing for switch and control load set up computation model for variable.
4. low pressure according to claim 1 three load balancing control methods, is characterized in that, the set-point in described step (3) is 10%.
5. low pressure according to claim 1 three load balancing control methods, it is characterized in that, in described step (4), mean value iterative method computational methods are: first according to measurement data, calculate every current value, this every current value computing formula is:
I
φ=sum (I
φ t), φ is a phase in ABC three-phase, and t represents the reversing switch being numbered t in φ phase, I
φ tbe the size of current that in φ phase, t numbering device controls;
Then three-phase average current value I is calculated
ave, select current maxima I
φ maxwith current minimum I
φ min, finally calculate the position needing reversing switch, this computing formula is:
Wherein, I
n Δthe electric current of maximal phase and the difference of mean value in three-phase current during n-th iteration; φ represents the phase that t reversing switch should change, the phase that namely in three-phase, current value is minimum; I
φ nmaxthe current value of the phase that electric current is maximum in three-phase when being n-th iteration, I
navethe mean value of three-phase current.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649592A (en) * | 2018-06-07 | 2018-10-12 | 安徽南瑞中天电力电子有限公司 | A kind of multi-functional automatic commutation system of mid ＆ low-voltage line and its phase change method |
| CN108695866A (en) * | 2018-07-13 | 2018-10-23 | 珠海英泰利电力技术有限公司 | It is a kind of to wait zero phase-change switch type three-phase load Automatic adjustment method and device |
| CN109103890A (en) * | 2018-09-27 | 2018-12-28 | 云南电网有限责任公司临沧供电局 | Voltage adjusting method and system in a kind of low-voltage network |
| CN109167376A (en) * | 2018-10-25 | 2019-01-08 | 贵州电网有限责任公司 | A kind of load side three-phase imbalance controlling device and its administering method |
| CN110112760A (en) * | 2019-06-12 | 2019-08-09 | 南方电网科学研究院有限责任公司 | A kind of three-phase imbalance adjusting method, system and central controller based on phase-change switch |
| CN111509742A (en) * | 2020-05-13 | 2020-08-07 | 广东电网有限责任公司 | Commutation method for three-phase unbalance |
| CN112152237A (en) * | 2020-09-03 | 2020-12-29 | 国电南瑞科技股份有限公司 | Transformer area power quality management method and system based on multi-DFACTS device coordination control |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| UA96244C2 (en) * | 2010-12-23 | 2011-10-10 | Винницкий Национальный Технический Университет | Device for the automatic balancing of current and voltage of a three-phase system |
| CN103337867A (en) * | 2013-06-28 | 2013-10-02 | 国家电网公司 | Low voltage load online phase modulation device and phase modulation method thereof |
| CN103368190A (en) * | 2013-07-17 | 2013-10-23 | 国家电网公司 | Method for controlling low-voltage load on-line phasing |
| CN104092229A (en) * | 2014-07-14 | 2014-10-08 | 山东卓尔电气有限公司 | Distributed type power supply zone branch circuit three-phase load current balance monitoring method and device |
| JP5645864B2 (en) * | 2012-03-19 | 2014-12-24 | 三菱電機株式会社 | Three-phase unbalance suppression system |
-
2015
- 2015-10-14 CN CN201510665595.7A patent/CN105406493B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| UA96244C2 (en) * | 2010-12-23 | 2011-10-10 | Винницкий Национальный Технический Университет | Device for the automatic balancing of current and voltage of a three-phase system |
| JP5645864B2 (en) * | 2012-03-19 | 2014-12-24 | 三菱電機株式会社 | Three-phase unbalance suppression system |
| CN103337867A (en) * | 2013-06-28 | 2013-10-02 | 国家电网公司 | Low voltage load online phase modulation device and phase modulation method thereof |
| CN103368190A (en) * | 2013-07-17 | 2013-10-23 | 国家电网公司 | Method for controlling low-voltage load on-line phasing |
| CN104092229A (en) * | 2014-07-14 | 2014-10-08 | 山东卓尔电气有限公司 | Distributed type power supply zone branch circuit three-phase load current balance monitoring method and device |
Non-Patent Citations (1)
| Title |
|---|
| 李峻等: "低压三相不平衡调整优选方案的计算机实现", 《电气应用》 * |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130130B (en) * | 2018-06-07 | 2021-02-12 | 安徽南瑞中天电力电子有限公司 | Multifunctional automatic phase changing system and method for medium and low voltage line |
| CN111130129B (en) * | 2018-06-07 | 2021-03-02 | 安徽南瑞中天电力电子有限公司 | Multifunctional automatic phase-changing system for medium and low voltage line |
| CN111276985A (en) * | 2018-06-07 | 2020-06-12 | 安徽南瑞中天电力电子有限公司 | Multifunctional automatic phase changing system and method for medium and low voltage line |
| CN111181180B (en) * | 2018-06-07 | 2021-07-27 | 安徽南瑞中天电力电子有限公司 | Multifunctional automatic phase changing system and method for medium and low voltage line |
| CN111276985B (en) * | 2018-06-07 | 2021-05-14 | 安徽南瑞中天电力电子有限公司 | Multifunctional automatic phase changing system and method for medium and low voltage line |
| CN111130129A (en) * | 2018-06-07 | 2020-05-08 | 安徽南瑞中天电力电子有限公司 | Multifunctional automatic phase-changing system for medium and low voltage line |
| CN111130130A (en) * | 2018-06-07 | 2020-05-08 | 安徽南瑞中天电力电子有限公司 | Multifunctional automatic phase changing system and method for medium and low voltage line |
| CN111181180A (en) * | 2018-06-07 | 2020-05-19 | 安徽南瑞中天电力电子有限公司 | Multifunctional automatic phase changing system and method for medium and low voltage line |
| CN108649592A (en) * | 2018-06-07 | 2018-10-12 | 安徽南瑞中天电力电子有限公司 | A kind of multi-functional automatic commutation system of mid ＆ low-voltage line and its phase change method |
| CN108695866A (en) * | 2018-07-13 | 2018-10-23 | 珠海英泰利电力技术有限公司 | It is a kind of to wait zero phase-change switch type three-phase load Automatic adjustment method and device |
| CN109103890A (en) * | 2018-09-27 | 2018-12-28 | 云南电网有限责任公司临沧供电局 | Voltage adjusting method and system in a kind of low-voltage network |
| CN109103890B (en) * | 2018-09-27 | 2022-07-26 | 云南电网有限责任公司临沧供电局 | Voltage regulation method and system in low-voltage distribution network |
| CN109167376A (en) * | 2018-10-25 | 2019-01-08 | 贵州电网有限责任公司 | A kind of load side three-phase imbalance controlling device and its administering method |
| CN110112760A (en) * | 2019-06-12 | 2019-08-09 | 南方电网科学研究院有限责任公司 | A kind of three-phase imbalance adjusting method, system and central controller based on phase-change switch |
| CN110112760B (en) * | 2019-06-12 | 2020-11-03 | 南方电网科学研究院有限责任公司 | Three-phase unbalance adjusting method and system based on phase change switch and centralized controller |
| CN111509742B (en) * | 2020-05-13 | 2021-07-13 | 广东电网有限责任公司 | Commutation method for three-phase unbalance |
| CN111509742A (en) * | 2020-05-13 | 2020-08-07 | 广东电网有限责任公司 | Commutation method for three-phase unbalance |
| CN112152237A (en) * | 2020-09-03 | 2020-12-29 | 国电南瑞科技股份有限公司 | Transformer area power quality management method and system based on multi-DFACTS device coordination control |
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Address after: 210036 No. 243 Fenghuang West Street, Jiangsu, Nanjing Patentee after: State Grid Corporation of China Patentee after: JIANGSU ELECTRIC POWER Co. Patentee after: JIANGSU ELECTRIC POWER COMPANY Research Institute Patentee after: NARI Intelligent Distribution Technology Co.,Ltd. Address before: 210036 No. 243 Fenghuang West Street, Jiangsu, Nanjing Patentee before: State Grid Corporation of China Patentee before: JIANGSU ELECTRIC POWER Co. Patentee before: JIANGSU ELECTRIC POWER COMPANY Research Institute Patentee before: BEIJING DIANYAN HUAYUAN ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. |