CN2924883Y - Three-phase unbalance adjusting and reactive power compensation device - Google Patents
Three-phase unbalance adjusting and reactive power compensation device Download PDFInfo
- Publication number
- CN2924883Y CN2924883Y CNU2006200759022U CN200620075902U CN2924883Y CN 2924883 Y CN2924883 Y CN 2924883Y CN U2006200759022 U CNU2006200759022 U CN U2006200759022U CN 200620075902 U CN200620075902 U CN 200620075902U CN 2924883 Y CN2924883 Y CN 2924883Y
- Authority
- CN
- China
- Prior art keywords
- phase
- combination switch
- reactive power
- controller
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 230000005611 electricity Effects 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000008901 benefit Effects 0.000 abstract description 9
- 150000001875 compounds Chemical class 0.000 abstract description 5
- 238000004891 communication Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 5
- 230000007812 deficiency Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Control Of Electrical Variables (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model discloses an unbalanced three phase adjusts and reactive power compensator. The method is applied to a power distribution system for reactive compensation and three-phase unbalance adjustment. It is composed of controller, compound switch and capacitor. The controller controls the compound switch, and the compound switch realizes capacitor switching. The utility model has the advantages that can realize load balance adjustment and reactive compensation effectively.
Description
Technical field
The utility model relates to a kind of power electronic equipment that distribution system is carried out reactive power compensation and three-phase imbalance adjusting that is applied to.Specifically a kind of three-phase imbalance is regulated and reactive power compensator.
Background technology
Reactive power is the part energy that flows back and forth between electric power system power supply and load, it is not to the load acting, but its mobile meeting causes the energy loss on the circuit, and has increased the voltage landing of circuit, therefore, carry out reactive power compensation and have good economic benefits; Low-voltage network is the end of electric power system, low-voltage network adopts the three-phase four-wire system mode, the distribution transformer low-pressure side adopts the Yn0 wiring, and the imbalance of electrical network can increase the loss of circuit and transformer, reduces exerting oneself of transformer, influence the power supply quality of electrical network, even can influence the precision of electric energy meter, cause the metering system loss of chargeing, because the three-phase load imbalance causes current in middle wire to increase, can reduce the reliability of electric power system, influence distribution system and safe operation.Because the sharing of load inequality, load character is also inconsistent, causes the idle deficiency of low-voltage power supply system, and is load unbalanced.Especially the comparatively flourishing area of economic level shows more obvious.Idle deficiency, load unbalanced these two problems have become two hang-ups of distribution system.Problem at idle deficiency, the way of domestic solution is: the reasonable disposition low-voltage reactive power compensation capacitor, the principle majority of its compensation is that common benefit combines with dividing benefit, and technology mode and the auxiliary voltage mass monitoring system of taking controllable silicon switching, contactor to move, it takes means to be mostly to go to realize by far infrared or GPRS communication system.This technology is mature on the whole at present, but it does not consider situation how to remove to improve distribution low-pressure system three-phase imbalance.Therefore, the problem of three-phase imbalance has become current distribution system problem demanding prompt solution, also is the technological gap of distribution system.Research for the three-phase imbalance compensation, all be confined to the medium voltage distribution network of three-phase three-wire system, adopt leg-of-mutton susceptance network, compensation negative-sequence current and harmonic current, and, all do not take effective indemnifying measure for the compensation of the zero-sequence current component in the low-voltage network of three-phase four-wire system.
Chinese patent CN88202441, it discloses an implementation that carries out reactive power compensation, and its control circuit part is made of discrete component, its advantage is that circuit is simple, and cost is lower, realizes easily, but weak point is a function singleness, can not realize senior calculation function.
Chinese patent CN98223360, it discloses a kind of novel reactive power compensator, its advantage is that controller is made of single-chip microcomputer, and have the intelligent operation/cutting algorithm, still have only reactive power compensation, the transless status monitoring function but its weak point is its allomeric function, no communication function, be not suitable for the communication of electrical power distribution automatization system, can't realize overall monitor distribution transformer
Chinese patent CN2468202Y discloses the low-voltage comprehensive reactive power compensator, just further improves at traditional reactive power compensator, has increased communication, the function of Transformer's Condition Monitoring.The switching of capacitor also is traditional mode of passing through controller control A.C. contactor, fail safe, and reliability is limited.
Summary of the invention
The purpose of this utility model provides a kind of three-phase imbalance and regulates and reactive power compensator, and overcoming in the prior art reactive power compensator can only compensating reactive power, the shortcoming that can not adjust the three-phase imbalance state.
The utility model is achieved by the following technical solution: a kind of three-phase imbalance is regulated and reactive power compensator, and it comprises microcomputerized controller, combination switch, capacitor, it is characterized in that employing 485 is communicated by letter between controller and each combination switch; Alternate electric capacity and phase earth capacitance are respectively triangle and are connected with star-like and are connected, and are connected across respectively between the two-phase phase meritorious transferred to another mutually idle being compensated; Utilize combination switch to capacitor switching, promptly A, B, C three-phase are organized combination switch and three combined combination switches mutually by the single-pole switch order respectively, and A, B, C three-phase electricity that single-phase group of combination switch comes out connect the phase earth capacitance respectively; A, B, C three-phase electricity that three-phase group combination switch comes out connect alternate electric capacity respectively.
The utlity model has following characteristics and advantage:
1, one of critical piece of this device has adopted intelligent compound switch, according to different capacity requirements, and total many groups.Have the advantage of silicon control zero-cross switching in the moment of switching, during normal the connection, have the advantage that contactor does not have power consumption again.Remedy controllable silicon and A.C. contactor deficiency in the low-pressure reactive compensation application facet.All combination switches all have the communication interface, can control by communication.
2, alternate electric capacity is the critical piece of this device with earth capacitance mutually, and when system need regulate, the switching by combination switch was with the capacitor input or withdraw from, and changed the operational factor of system, thereby reached the purpose of adjustment, the technical indicator of raising system operation.
● alternate AB capacitance group number can be selected configuration by 0-4
● alternate BC capacitance group number can be selected configuration by 0-4
● alternate CA capacitance group number can be selected configuration by 0-4
● single-phase group of group number can each selection configuration of three-phase 0-4
● three-phase group group number can be selected configuration by 0-3
3. the basic principle adjusted of this device is " balance " three-phase load (not being the balanced power factor), this device can make the reactive power trend be controlled at a three-phase capacitor pool-size+0.75 ~-0.4 times in.Therefore also have certain load or burden without work under the situation of power flow less (gently), but under the bigger situation of power flow, compensativity is just considerable, power factor can reach 0.999.For the transformer that is in underrun for a long time, improve power factor, select to mend the less capacitor of capacity altogether and get final product.
4, best mode is handled capacitor, and the adjustment of single-phase electricity container mainly is used for adjusting three alternate uneven reactive loads, but also is the total idle part of three-phase, and this device can be handled the effect of alternate phase earth capacitance well well.Handle capacitor input quantity well and be in low amount, middle amount, the action behavior of a large amount three phases.
Description of drawings
Be described in further detail scheme of the present utility model below in conjunction with drawings and Examples.
Accompanying drawing 1 is a principle of compositionality schematic diagram of the present utility model;
Accompanying drawing 2 is the utility model control principle figure.
1, controller; 2 USB (universal serial bus); 3, analog quantity input interface; 4,485 interfaces; 5, single-phase group of combination switch; 6, phase earth capacitance; 7, alternate electric capacity; 8, three-phase group combination switch; 9, single-pole switch; 10, lightning rod; 11, three-phase breaker; 12,0.4KV bus binding post; 13, sampling unit; 14, isolated location; 15, central processing unit; 16, communication module; 17, display module; 18, keyboard.
Embodiment
As shown in Figure 1, the utility model is made of a plurality of parts that are installed in the casing, mainly comprise controller (1), combination switch (5) (8), can be equipped with the capacitor group of right quantity in the capacitor group (6) (7), casing as required, condenser capacity, alternate electric capacity is respectively the star-like wiring of trigonometric sum with earth capacitance group mutually, therefore can carry out the expansion of capacity at an easy rate.
As shown in Figure 2, controller of the present utility model (1) is made of a plurality of built-in functions unit.Mainly comprise central processing unit (15), sampling unit (13), isolated location (14), communication module (16), comprise USB (universal serial bus) (2), 485 interfaces (4), display module (17), keyboard compositions such as (18).
In conjunction with the accompanying drawings 1, accompanying drawing 2, user side UA, UB, UC three-phase phase voltage and IA, IB, IC, each phase current provides current transformer through the user, enters by this device analog quantity interface (3), through controller sampling unit (13), isolated location (14) enters central processing unit (15), forms controller (1) work and judges necessary parameter.Calculate the capacity of capacitor bank that needs compensation, provide compensation scheme, controller carries out switching by 485 total line traffic control combination switches to the capacitor group.The low-pressure side power supply of transformer enters three-phase breaker (11) through 0.4KV bus binding post.After coming out from circuit breaker, bus connects lightning rod (10).A, B, C, three-phase organize combination switch (5) mutually by single-pole switch (9) order respectively, and three-phase group combination switch (8) is assigned to respectively on the capacitor of each rank capacity through combination switch.From the A that single-phase group of combination switch (5) comes out, B, the C three-phase electricity connects phase earth capacitance (6) respectively.From the A that three-phase group combination switch (8) comes out, B, the C three-phase electricity connects alternate electric capacity (7) respectively.
The central processing unit (15) of device middle controller is made up of two CPU, is the center processing mechanism of whole measurement device, demonstration, computing, communication and execution.Controller (1) passes through the transformer three-phase voltage, three-phase current is monitored, it can be according to the amplitude of the amplitude of electrical network three-phase voltage, uneven degree and neutral point displacement voltage and phase place etc., condenser capacity that computing system need compensate and group, thereby send instruction accurately, transformer is carried out imbalance regulate and reactive power compensation.Controller adopts and the secondary source technology can be resisted various electromagnetic interference, and all acquisition interface all adopt light/electricity isolation, can eliminate the interference of primary system to controller, and controller also is provided with the watchdog self-resetting circuit, the automatically reseting of feasible system.Controller is provided with communication module (16), and a substation that can be used as distribution automation system is inserted in the automated system.Controller (1) simultaneously three-phase imbalance regulate, the Comprehensive Control of reactive power compensation, reduce the cost of investment of equipment effectively.Controller keyboard (18) is easy to operate, can browse electric current, voltage power, power factor, clock, harmonic wave data such as (3 ~ 15 times) with keyboard operation, and can be provided with operation clock, parameter, and Chinese character shows.
The utility model utilizes system controlled by computer, intelligent compound switch and capacitor group etc. to form a cover automatic regulating equipment.This device is articulated in step down side, device is at first according to user load situation, idle situation, parameters such as current in middle wire, the switching situation of the combination switch in the adjusting device, by the alternate and organic assembling of electric capacity relatively, the active load of the three-phase of balance adjustment transformer, compensator transformer power factor, make transformer operate in rational state, have effectively load balancing and regulate and no-power compensation function.Can be widely used in the distribution system.
Claims (1)
1, a kind of three-phase imbalance is regulated and reactive power compensator, and it comprises microcomputerized controller, combination switch, capacitor, it is characterized in that employing 485 is communicated by letter between controller and each combination switch; Alternate electric capacity and phase earth capacitance are respectively triangle and are connected with star-like and are connected, and are connected across respectively between the two-phase phase meritorious transferred to another mutually idle being compensated; Utilize combination switch to capacitor switching, be that A, B, C three-phase are organized combination switch (5) and three combined combination switches (8) mutually by single-pole switch (9) order respectively, A, the B that single-phase group of combination switch (5) comes out, C three-phase electricity connect phase earth capacitance (6) respectively; A, the B that three-phase group combination switch (8) comes out, C three-phase electricity connect alternate electric capacity (7) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200759022U CN2924883Y (en) | 2006-07-19 | 2006-07-19 | Three-phase unbalance adjusting and reactive power compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200759022U CN2924883Y (en) | 2006-07-19 | 2006-07-19 | Three-phase unbalance adjusting and reactive power compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2924883Y true CN2924883Y (en) | 2007-07-18 |
Family
ID=38261310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200759022U Expired - Fee Related CN2924883Y (en) | 2006-07-19 | 2006-07-19 | Three-phase unbalance adjusting and reactive power compensation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2924883Y (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055202A (en) * | 2011-01-21 | 2011-05-11 | 浙江浙大网新能源技术有限公司 | Three-phase balancing power-supply energy-saving control management system |
| CN102130462A (en) * | 2011-03-18 | 2011-07-20 | 杭州得诚电力科技有限公司 | Intelligent electrical load unbalance compensation device |
| CN103066606A (en) * | 2011-10-22 | 2013-04-24 | 徐州上若伏安电气有限公司 | 485-bus-based cutting machine control technology |
| CN103178531A (en) * | 2013-04-16 | 2013-06-26 | 南通能达电力科技有限公司 | Active power transfer type intelligent combined capacitor |
| CN103280807A (en) * | 2013-06-07 | 2013-09-04 | 济南拉斐叶电力科技有限公司 | Distribution network power quality comprehensive compensator |
| CN103354361A (en) * | 2013-06-19 | 2013-10-16 | 国家电网公司 | Low-voltage three-phase load automation balancing device |
| CN103368189A (en) * | 2013-06-28 | 2013-10-23 | 洛阳恒光特种变压器有限公司 | Method for solving capacitance unbalance of transformer |
| CN103837752A (en) * | 2014-02-26 | 2014-06-04 | 广州供电局有限公司 | Method and system for monitoring three-phase imbalance of electric system |
| CN103986168A (en) * | 2014-05-08 | 2014-08-13 | 北京德威特继保自动化科技股份有限公司 | Reactive compensation control method, device and system |
| CN104167749A (en) * | 2014-07-24 | 2014-11-26 | 广东电网公司电力科学研究院 | Inhibition method for three-phase imbalance voltages of power distribution network |
| CN104934993A (en) * | 2014-03-19 | 2015-09-23 | 罗宇凡 | Balance controller of high potential phase in single-phase electrically automatically switch three phases |
| CN105098977A (en) * | 2014-12-18 | 2015-11-25 | 华北电力大学 | Intelligent capacitor group operation state and parameter monitoring device |
| CN105656062A (en) * | 2016-04-01 | 2016-06-08 | 江苏盐开电气有限公司 | Power distribution network triphase load automatic adjusting device and control method thereof |
| CN106169758B (en) * | 2016-08-01 | 2018-07-17 | 北京燕能电气技术有限公司 | A kind of device and method of automatic raising low voltage three-phase line end voltage |
-
2006
- 2006-07-19 CN CNU2006200759022U patent/CN2924883Y/en not_active Expired - Fee Related
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055202B (en) * | 2011-01-21 | 2012-12-12 | 浙江浙大网新能源技术有限公司 | Three-phase balancing power-supply energy-saving control management system |
| CN102055202A (en) * | 2011-01-21 | 2011-05-11 | 浙江浙大网新能源技术有限公司 | Three-phase balancing power-supply energy-saving control management system |
| CN102130462A (en) * | 2011-03-18 | 2011-07-20 | 杭州得诚电力科技有限公司 | Intelligent electrical load unbalance compensation device |
| CN102130462B (en) * | 2011-03-18 | 2013-11-27 | 杭州得诚电力科技有限公司 | Intelligent electrical load unbalance compensation device |
| CN103066606A (en) * | 2011-10-22 | 2013-04-24 | 徐州上若伏安电气有限公司 | 485-bus-based cutting machine control technology |
| CN103178531A (en) * | 2013-04-16 | 2013-06-26 | 南通能达电力科技有限公司 | Active power transfer type intelligent combined capacitor |
| CN103280807A (en) * | 2013-06-07 | 2013-09-04 | 济南拉斐叶电力科技有限公司 | Distribution network power quality comprehensive compensator |
| CN103354361A (en) * | 2013-06-19 | 2013-10-16 | 国家电网公司 | Low-voltage three-phase load automation balancing device |
| CN103368189A (en) * | 2013-06-28 | 2013-10-23 | 洛阳恒光特种变压器有限公司 | Method for solving capacitance unbalance of transformer |
| CN103837752A (en) * | 2014-02-26 | 2014-06-04 | 广州供电局有限公司 | Method and system for monitoring three-phase imbalance of electric system |
| CN103837752B (en) * | 2014-02-26 | 2016-08-17 | 广州供电局有限公司 | The monitoring method of the tri-phase unbalance factor of power system and system |
| CN104934993A (en) * | 2014-03-19 | 2015-09-23 | 罗宇凡 | Balance controller of high potential phase in single-phase electrically automatically switch three phases |
| CN103986168A (en) * | 2014-05-08 | 2014-08-13 | 北京德威特继保自动化科技股份有限公司 | Reactive compensation control method, device and system |
| CN104167749B (en) * | 2014-07-24 | 2016-05-11 | 广东电网有限责任公司电力科学研究院 | A kind of power distribution network three-phase imbalance voltage inhibition method |
| CN104167749A (en) * | 2014-07-24 | 2014-11-26 | 广东电网公司电力科学研究院 | Inhibition method for three-phase imbalance voltages of power distribution network |
| CN105098977A (en) * | 2014-12-18 | 2015-11-25 | 华北电力大学 | Intelligent capacitor group operation state and parameter monitoring device |
| CN105098977B (en) * | 2014-12-18 | 2017-10-27 | 华北电力大学 | Intelligent capacitor group running status and parameter monitoring device |
| CN105656062A (en) * | 2016-04-01 | 2016-06-08 | 江苏盐开电气有限公司 | Power distribution network triphase load automatic adjusting device and control method thereof |
| CN105656062B (en) * | 2016-04-01 | 2018-05-08 | 江苏盐开电气有限公司 | Power distribution network three-phase load self-checking device and its control method |
| CN106169758B (en) * | 2016-08-01 | 2018-07-17 | 北京燕能电气技术有限公司 | A kind of device and method of automatic raising low voltage three-phase line end voltage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2924883Y (en) | Three-phase unbalance adjusting and reactive power compensation device | |
| CN101807799B (en) | Super capacitor energy storage type power quality compensator | |
| CN103501058B (en) | Based on the energy efficiency management system of Intelligent platform zone | |
| CN103852663A (en) | Energy feedback type distributed photovoltaic power inverter integrated test system | |
| CN102856920B (en) | Three-phase unbalanced load compensation device and method | |
| CN206850445U (en) | A kind of low-voltage platform area power quality harnessed synthetically power distribution equipment | |
| CN201548670U (en) | DC power comprehensive test instrument | |
| CN202231434U (en) | Intelligent power saver | |
| CN207625296U (en) | A kind of active and passive combination power load three-phase imbalance regulating device | |
| CN111446739A (en) | Power distribution station distribution system with distributed energy storage devices and control method thereof | |
| CN105720590A (en) | Flexible control device and method for reactive compensation of distribution station area | |
| CN104698379A (en) | Ground aero-generator power supply testing based load management system | |
| CN103645363A (en) | Two-way metering three-phase intelligent electric energy meter | |
| CN111969605A (en) | Energy-saving loss-reducing system and method for distribution line | |
| CN207218249U (en) | A kind of intelligent balance pressure regulation harmonic elimination comprehensive treatment device | |
| CN201518419U (en) | High-voltage, medium-voltage and low-voltage comprehensive compensation control system for arc furnace | |
| CN101577432A (en) | Reactive power compensation method and control device adopting same | |
| CN102646986B (en) | Magnetically controlled reactor controller and method thereof | |
| CN201601492U (en) | Optional-adjustment automatic tracing compensation arc extinction control device | |
| CN102055199A (en) | Reactive demand second order prediction algorithm suitable for automatic control of unequal capacity capacitor bank and application thereof | |
| CN201887483U (en) | Reactive compensation intelligent monitoring manager | |
| CN203014683U (en) | Household circuit structure capable of converting three-phase power into single-phase power | |
| CN203504191U (en) | Low-voltage reactive power compensation controller | |
| CN202602298U (en) | Voltage-regulating capacitance-regulating type reactive compensation complete device of high voltage line | |
| Tikar et al. | Enhancement of voltage stability by using FACTS device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |