CN105811422A - Automatic reactive compensation controller - Google Patents
Automatic reactive compensation controller Download PDFInfo
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- CN105811422A CN105811422A CN201610153424.0A CN201610153424A CN105811422A CN 105811422 A CN105811422 A CN 105811422A CN 201610153424 A CN201610153424 A CN 201610153424A CN 105811422 A CN105811422 A CN 105811422A
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- 239000003990 capacitor Substances 0.000 claims abstract description 36
- 238000013480 data collection Methods 0.000 claims abstract description 17
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 51
- 238000004891 communication Methods 0.000 claims description 10
- 230000000052 comparative effect Effects 0.000 claims description 3
- 230000001932 seasonal effect Effects 0.000 abstract description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 241001269238 Data Species 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229960001296 zinc oxide Drugs 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 229950000845 politef Drugs 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- 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
-
- 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)
- Control Of Electrical Variables (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses an automatic reactive compensation controller, which comprises a DSP processor, a voltage sampling circuit, a current sampling circuit and a memory, wherein the DSP processor is provided with a threshold presetting module and a data processing module; a delay threshold and a voltage switching threshold are preset through the threshold presetting module and are stored into the memory; the voltage sampling circuit carries out voltage data collection according to the preset delay threshold; and the data processing module compares the collected voltage data with the preset voltage switching threshold and controls intelligent capacitors to act according to the comparison result. The preset delay threshold on the DSP processor can be freely set according to the characteristics of actual rural public variable load and seasonal changes, so that the mean value calculated by five-times voltage or current data collection of each fluctuation is relatively accurate; and the problem that the automatic reactive compensation controller frequently transmits intelligent capacitor switching instructions due to volatile value data fluctuation is solved.
Description
Technical field
The present invention relates to reactive power compensation technology.
Background technology
Automatic reactive compensated controller in the market utilizes voltage threshold to control the method that idle switching all adopts time delay, but in rural area, owing to power load distributing is unbalanced, seaonal load changes greatly, it is arranged on the reactive power compensator that line side compensates as line sectionalizing, it is frequently encountered by delay time and arranges short, just frequently, if delay time arranges long, side, rural line just can not get timely increase line trackside quality of voltage when there is of short duration " low-voltage " to idle switching.
Therefore, how to adopt effective determination methods, make automatic reactive compensated controller send instruction timely, be avoided that again Intelligent capacitor switching action frequently simultaneously, be problem currently in the urgent need to address.
Summary of the invention
The technical problem to be solved is just to provide a kind of automatic reactive compensated controller, improves the accuracy rate in idle switching process, it is to avoid because voltage pulsation makes Intelligent capacitor frequent movement.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that a kind of automatic reactive compensated controller, including dsp processor, voltage sample circuit, current sampling circuit, memorizer, described dsp processor is provided with threshold values presetting module and data processing module, preset time delay threshold values and voltage switching threshold values by threshold values presetting module and store in memory, described voltage sample circuit carries out voltage data collection according to default time delay threshold values, the voltage data of collection is compared with the voltage switching threshold values preset and controls Intelligent capacitor action according to comparative result by described data processing module；
The auto-reactive compensation switching control method of described automatic reactive compensated controller comprises the steps:
Step 1: be sequentially carried out 5 voltage data collections according to default time delay threshold values, the meansigma methods calculating 5 voltage values obtains first time average voltage, whether compares voltage switching threshold values × 1.05 less than first time average voltage；It is judged as "No", exits reactive compensation switching and control process；It is judged as that "Yes" then enters step 2；
Step 2: be sequentially carried out 5 voltage data collections according to default time delay threshold values, the meansigma methods calculating 5 voltage values obtains second time average voltage, relatively whether voltage switching threshold values × 1.02 are less than second time average voltage, if it is determined that "No", determine whether that whether second time average voltage is more than first time average voltage, if the judgment is Yes, exit reactive compensation switching and control process；Otherwise enter step 3；
Step 3: automatic reactive compensated controller sends the 1st group of Intelligent capacitor and puts into operation instruction, it is sequentially carried out 5 voltage data collections further according to default time delay threshold values simultaneously, the meansigma methods calculating 5 voltage values obtains third time average voltage, whether compares voltage switching threshold values × 0.99 less than third time average voltage；It is judged as "No", relatively whether third time average voltage is more than second time average voltage, if the judgment is Yes, relatively whether third time average voltage is more than first time average voltage, if the judgment is Yes, automatic reactive compensated controller sends the 1st group of Intelligent capacitor instruction of excision, exits reactive compensation switching and controls process；Otherwise enter step 4；
Step 4: be sequentially carried out 5 voltage data collections according to default time delay threshold values, the meansigma methods calculating 5 voltage values obtains the 4th average voltage, and whether rate of exchange voltage switching threshold values × 0.97 is less than the 4th average voltage；Being judged as NO, whether compare the 4th average voltage more than third time average voltage, if the judgment is No, automatic reactive compensated controller sends the 2nd group of intelligent capacitor and puts into operation instruction；Otherwise enter step 5；
Step 5: be sequentially carried out 5 voltage data collections according to default time delay threshold values, calculates 5 average voltages, whether compares voltage switching threshold values × 1.02 less than the 5th average voltage；Being judged as NO, compare the 5th average voltage more than whether second time average voltage is set up, if the judgment is Yes, automatic reactive compensated controller sends excision the 1st group and the 2nd group of Intelligent capacitor instruction, exits reactive compensation switching and controls to judge；Otherwise perform circulation step 4.
As preferably, described automatic reactive compensated controller is provided with RS485 communication interface, and described RS485 communication connector is connected with Intelligent capacitor communication by connection.
The technical solution used in the present invention, it has the beneficial effect that:
1, default time delay threshold values on dsp processor is utilized, can according to the feature of actual rural area public affairs varying duty Yu seasonal variations, freely set, the voltage of every ripple 5 times or current data is made to gather calculated meansigma methods more accurate, it is to avoid value data fluctuations is indefinite and causes that automatic reactive compensated controller frequently sends Intelligent capacitor switching instruction.
2, by the cycle-criterion of 5 times, 5 measured datas of delay number are added, it is possible to accomplishing that the data of switching instruction are more accurate, switching action is more correct.
3, by criterion, Intelligent capacitor is performed step-by-step switch, it is possible to avoid line side to mend the generation of phenomenon without merits and demerits, Intelligent capacitor excessively frequent switching during voltage prompt drop when also solving motor or user's starting of air conditioner in summer simultaneously.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is automatic reactive compensator inner member mounting structure schematic diagram；
Fig. 2 is the structural representation of automatic reactive compensated controller；
Fig. 3 is the auto-reactive compensation switching control method flow graph of auto-reactive compensation device；
Fig. 4 is the scheme of installation of automatic reactive compensator；
Fig. 5 is the fixed structure schematic diagram of automatic reactive compensator；
Fig. 6 is the structural representation into line clamping device.
Detailed description of the invention
The electric pole of rural area low-voltage circuit branch line or user's end is installed portable many adaptation pressure regulation automatic reactive compensators.
nullAs shown in Figure 1，The portable pressure regulation automatic reactive compensator that adapts to includes casing more，Current transformer is installed in casing、Automatic reactive compensated controller、RCD、Chopper、Intelligent capacitor、Zinc-Oxide Arrester，Casing internal upper part installs 3 × 25 copper bars，Turnover binding post is connected with copper bar，Copper bar downlead is through A、B、C phase current mutual inductor is connected with RCD upper end，RCD upper end first via lead-in wire is connected with automatic reactive compensated controller voltage sampling end，Second pass line is connected with Zinc-Oxide Arrester，3rd pass line is then connected with corresponding Intelligent capacitor through chopper，Current Transformer Secondary line is connected with automatic reactive compensated controller current sampling end，485 connections of at least 2 group Intelligent capacitors are connected with 485 connections of automatic compensating controller，RCD lower prop lead-in wire is connected with outlet binding post，Casing is connected to grounding body.
Specific works principle is as follows:
Automatic reactive compensated controller is accessed by gathering low-voltage circuit A, B, C phase current and voltage data, automatic reactive compensated controller controls Intelligent capacitor again and realizes three-phase separate or mend switching action altogether, when low-voltage circuit voltage is lower than automatic reactive compensated controller pre-set threshold value, the method controlled by auto-reactive compensation switching by automatic reactive compensated controller performs cycle criterion, throws successively according to criterion step or cuts Intelligent capacitor.Zinc-Oxide Arrester is to solve to carry out voltage clamping when circuit bears overvoltage; protection device can be dragged down do not burnt by thunderbolt when too high voltage occurs; earth terminal is connected with earthing rod through wire; RCD can realize protection cabinet electric leakage and low-voltage circuit line electrical leakage after outlet, it is achieved low-voltage circuit electric leakage buffer action.
As in figure 2 it is shown, automatic reactive compensated controller is provided with dsp processor, memorizer, gsm communication module, voltage sample circuit, current sampling circuit, interactive keyboard, LED data show and RS485 communication interface forms.
Dsp processor is provided with threshold values presetting module and data processing module, preset time delay threshold values and voltage switching threshold values by threshold values presetting module and store in memory, voltage sample circuit carries out voltage data collection according to default time delay threshold values, and the voltage data of collection is compared with the voltage switching threshold values preset and controls Intelligent capacitor action according to comparative result by data processing module.
By interactive keyboard predeterminated voltage switching threshold values, time delay in dsp processor, threshold values and power factor (PF) switching threshold values are set.Automatic reactive compensated controller adopts voltage sampling circuit to access and current sampling circuit accesses, voltage segment then adopts and is directly accessed, then undertaken converting voltage value to by automatic reactive compensated controller built-in voltage sample circuit, and the method execution cycle criterion of auto-reactive compensation switching control is carried out in the built-in default threshold values of dsp processor, chance judgement provides when needing to put into Intelligent capacitor, sent event by dsp processor and push to corresponding Intelligent capacitor through RS485 communication interface, Intelligent capacitor accepts instruction and puts into operation, dsp processor retransmits instruction simultaneously, the SMS that Intelligent capacitor puts into operation is sent through GSM communication module；Current sampling circuit is by current transformer measured data transmission, amplify through current sampling circuit and process, push data into dsp processor, by dsp processor through electric current, power factor, the COMPREHENSIVE CALCULATING such as idle, under determining idle deficient benefit state, perform the method cycle criterion that auto-reactive compensation switching controls, reach condition, dsp processor send instruction and put into Intelligent capacitor.
As it is shown on figure 3, the method that auto-reactive compensation switching controls is as follows:
Criterion 1: threshold values 5 realities of calculating are set according to the time delay of dsp processor and adopt the speed of data, and it is sequentially carried out 5 voltage data collections, the average calculating 5 magnitudes of voltage obtains first time meansigma methods, is calculated by voltage switching threshold values × 1.05 of dsp processor simultaneously and judges whether less than first time measured data meansigma methods；Being judged as "No", actual measurement magnitude of voltage belongs to normal range, exits reactive compensation switching and controls to judge；It is judged as that "Yes" then enters criterion 2；
Criterion 2: gather 5 voltage datas according to above method more successively, calculate meansigma methods and voltage switching threshold values × 1.02 with dsp processor are calculated contrast, if less than second time measured data meansigma methods；Being judged as "No", second time measured data meansigma methods judged with first time measured data meansigma methods contrast, if greater than establishment, actual measurement magnitude of voltage belongs to normal range, exits reactive compensation switching and controls to judge；Otherwise enter criterion 3；
Criterion 3: automatic reactive compensated controller sends the 1st group of Intelligent capacitor and puts into operation instruction, gathers 5 voltage datas simultaneously more successively, calculates meansigma methods, contrast with pre-set threshold value × 0.99, if less than third time measured data meansigma methods；It is judged as "No", third time measured data meansigma methods is judged with second time measured data meansigma methods contrast, if greater than establishment, third time measured data meansigma methods carries out contrast again with first time measured data meansigma methods and judges, for another example more than establishment, actual measurement magnitude of voltage belongs to normal range, and automatic reactive compensated controller sends the 1st group of Intelligent capacitor instruction of excision, exits reactive compensation switching and controls to judge；Otherwise enter criterion 4；
Criterion 4: gather 5 voltage datas successively, calculate meansigma methods, contrast with pre-set threshold value × 0.97, if less than the 4th measured data meansigma methods；Being judged as "No", the 4th measured data meansigma methods judged with third time measured data meansigma methods contrast, if greater than being false, automatic reactive compensated controller sends the 2nd group of intelligent capacitor and puts into operation instruction；Otherwise enter criterion 5；
Criterion 5: gather 5 voltage datas successively, calculate meansigma methods, contrast with pre-set threshold value × 1.02, if less than the 5th measured data meansigma methods；It is judged as "No", 5th measured data meansigma methods being judged with second time measured data meansigma methods contrast, if greater than establishment, actual measurement magnitude of voltage belongs to normal range, automatic reactive compensated controller sends excision the 1st group and the 2nd group of Intelligent capacitor instruction, exits reactive compensation switching and controls to judge；Otherwise perform cycle-criterion 4.
It is above control method when Intelligent capacitor occurs needing putting in factors of voltage, the switching control method of power factor (PF) is similar to it, namely it is sequentially carried out 5 voltages and current data collection according to default time delay threshold values, and calculate power factor (PF) respectively, finally calculate the meansigma methods of 5 power factor (PF) numerical value, going to compare judgement with power factor (PF) switching threshold values, decision is to exit reactive compensation switching to control process, still determines whether again.But when Intelligent capacitor occur needing to put in voltage and power factor (PF), with the high priority data that voltage sample circuit records simultaneously.
As shown in Figure 4 and Figure 5, automatic reactive compensator includes casing 1 and is located at the electric elements in casing 1, and the back side of casing is fixed with installation arm 11, installs arm 11 and holds tightly fixing by anchor ear 21 and electric pole 2.
Electric pole 2 is cylindrical, installing arm 11 can adopt steel plate or iron plate to make, U-shaped, the base installing arm is horizontally disposed with, the first side of installation arm is welded with box back surface or bolt is fixed, the second side installing arm is being provided with a pair L-type locating piece 23 on electric pole side plane, and described L-type locating piece is positioned on electric pole periphery.The two ends, second side installing arm are provided with anchor ear bolt 22, and anchor ear is fixed by anchor ear bolt 22 with vertical arm second side of installing.L-type locating piece 23 adopts angle steel to make, and is welded and fixed with installing arm, due to the effect of L-type locating piece, therefore installs the location between arm 11 and electric pole 2 and fixed effect is better, more stable.
Additionally, casing is connected with support 12, for steel design, support two sides are triangular structure of right angle, are provided with gripper shoe 13 on the upside of support, and tank floor is placed in gripper shoe, it is provided with top board 14 at the top of casing, top board highlights forward, and on top board, plane is by the inclined-plane of rear side forward side inclined downward, in order to overboard.
As shown in Figure 6, the bottom of casing 1 is provided with a Wiinding cartridge 3, is provided with bobbin winoler in described Wiinding cartridge 3, and the base plate of described Wiinding cartridge is provided with line inlet port 30, and the downside of described line inlet port is connected to into wire terminal 31, described in enter wire terminal and be connected to into line clamping device.
Wherein, described enter line clamping device include interior gripping sleeve 32 and outer actuating sleeve 33, the endoporus of described outer actuating sleeve is provided with inner conical surface, the outer surface of described interior gripping sleeve is provided with male cone (strobilus masculinus), described male cone (strobilus masculinus) and inner conical surface are slidably matched, the outer surface of described outer actuating sleeve is provided with external screw thread, described in enter wire terminal and be provided with internal thread hole, described external screw thread engages with internal thread hole.Described enter wire terminal and box body be carbon steel structure, described outer actuating sleeve adopts carbon steel to make, and described interior gripping sleeve adopts politef to make.The structural strength of carbon steel and wearability are good, and politef deformation performance is good, to facilitate clamping optical cable.The outer surface of described outer actuating sleeve is provided with two parallel driving planes, with convenient wrench effect.
Claims (2)
1. an automatic reactive compensated controller, it is characterized in that: include dsp processor, voltage sample circuit, current sampling circuit, memorizer, described dsp processor is provided with threshold values presetting module and data processing module, preset time delay threshold values and voltage switching threshold values by threshold values presetting module and store in memory, described voltage sample circuit carries out voltage data collection according to default time delay threshold values, and the voltage data of collection is compared with the voltage switching threshold values preset and controls Intelligent capacitor action according to comparative result by described data processing module；
The auto-reactive compensation switching control method of described automatic reactive compensated controller comprises the steps:
Step 1: be sequentially carried out 5 voltage data collections according to default time delay threshold values, the meansigma methods calculating 5 voltage values obtains first time average voltage, whether compares voltage switching threshold values × 1.05 less than first time average voltage；It is judged as "No", exits reactive compensation switching and control process；It is judged as that "Yes" then enters step 2；
Step 2: be sequentially carried out 5 voltage data collections according to default time delay threshold values, the meansigma methods calculating 5 voltage values obtains second time average voltage, relatively whether voltage switching threshold values × 1.02 are less than second time average voltage, if it is determined that "No", determine whether that whether second time average voltage is more than first time average voltage, if the judgment is Yes, exit reactive compensation switching and control process；Otherwise enter step 3；
Step 3: automatic reactive compensated controller sends the 1st group of Intelligent capacitor and puts into operation instruction, it is sequentially carried out 5 voltage data collections further according to default time delay threshold values simultaneously, the meansigma methods calculating 5 voltage values obtains third time average voltage, whether compares voltage switching threshold values × 0.99 less than third time average voltage；It is judged as "No", relatively whether third time average voltage is more than second time average voltage, if the judgment is Yes, relatively whether third time average voltage is more than first time average voltage, if the judgment is Yes, automatic reactive compensated controller sends the 1st group of Intelligent capacitor instruction of excision, exits reactive compensation switching and controls process；Otherwise enter step 4；
Step 4: be sequentially carried out 5 voltage data collections according to default time delay threshold values, the meansigma methods calculating 5 voltage values obtains the 4th average voltage, and whether rate of exchange voltage switching threshold values × 0.97 is less than the 4th average voltage；Being judged as NO, whether compare the 4th average voltage more than third time average voltage, if the judgment is No, automatic reactive compensated controller sends the 2nd group of intelligent capacitor and puts into operation instruction；Otherwise enter step 5；
Step 5: be sequentially carried out 5 voltage data collections according to default time delay threshold values, calculates 5 average voltages, whether compares voltage switching threshold values × 1.02 less than the 5th average voltage；Being judged as NO, compare the 5th average voltage more than whether second time average voltage is set up, if the judgment is Yes, automatic reactive compensated controller sends excision the 1st group and the 2nd group of Intelligent capacitor instruction, exits reactive compensation switching and controls to judge；Otherwise perform circulation step 4.
2. a kind of automatic reactive compensated controller according to claim 1, it is characterised in that: described automatic reactive compensated controller is provided with RS485 communication interface, and described RS485 communication connector is connected with Intelligent capacitor communication by connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610153424.0A CN105811422B (en) | 2016-03-17 | 2016-03-17 | A kind of automatic reactive compensated controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610153424.0A CN105811422B (en) | 2016-03-17 | 2016-03-17 | A kind of automatic reactive compensated controller |
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| CN105811422A true CN105811422A (en) | 2016-07-27 |
| CN105811422B CN105811422B (en) | 2018-07-27 |
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| CN201610153424.0A Active CN105811422B (en) | 2016-03-17 | 2016-03-17 | A kind of automatic reactive compensated controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107212751A (en) * | 2017-07-28 | 2017-09-29 | 成都华津时代科技股份有限公司 | A kind of intelligence drinking-water terminal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001051734A (en) * | 1999-08-10 | 2001-02-23 | Hitachi Ltd | Reactive power compensation system |
| CN101924369A (en) * | 2010-09-07 | 2010-12-22 | 沈阳博来德滋电子科技有限公司 | Dynamic reactive power compensation method of intelligent low-pressure meter reading |
-
2016
- 2016-03-17 CN CN201610153424.0A patent/CN105811422B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001051734A (en) * | 1999-08-10 | 2001-02-23 | Hitachi Ltd | Reactive power compensation system |
| CN101924369A (en) * | 2010-09-07 | 2010-12-22 | 沈阳博来德滋电子科技有限公司 | Dynamic reactive power compensation method of intelligent low-pressure meter reading |
Non-Patent Citations (1)
| Title |
|---|
| 吴宇红等: "多适应调压自动无功补偿装置的设计与研究", 《上海电力学院学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107212751A (en) * | 2017-07-28 | 2017-09-29 | 成都华津时代科技股份有限公司 | A kind of intelligence drinking-water terminal |
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