CN203536971U - Series connection compensation device for intelligent distribution network - Google Patents
Series connection compensation device for intelligent distribution network Download PDFInfo
- Publication number
- CN203536971U CN203536971U CN201320751287.2U CN201320751287U CN203536971U CN 203536971 U CN203536971 U CN 203536971U CN 201320751287 U CN201320751287 U CN 201320751287U CN 203536971 U CN203536971 U CN 203536971U
- Authority
- CN
- China
- Prior art keywords
- voltage
- capacitor group
- compensation device
- 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 69
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000002955 isolation Methods 0.000 claims abstract description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 15
- 229910052710 silicon Inorganic materials 0.000 claims description 15
- 239000010703 silicon Substances 0.000 claims description 15
- 238000013016 damping Methods 0.000 claims description 12
- 230000005622 photoelectricity Effects 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000004044 response Effects 0.000 abstract description 3
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000008901 benefit Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013497 data interchange Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001131 transforming effect Effects 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
Abstract
The utility model discloses a series connection compensation device for an intelligent distribution network. The series connection compensation device for the intelligent distribution network has the effects of improving the voltage distribution along a distribution line, reducing the voltage drop and increasing the transmission capacity of the distribution line, and has the characteristics of load-adaptive voltage regulation and real-time response. In order to achieves the effects, the series connection compensation device for the intelligent distribution network comprises a capacitor bank, a thyristor, a controller, an integral reactor/ resistor, a circuit breaker, a contactor, an isolation switch, a sensor and the like. Due to adoption of the structure, when a system works normally, voltage compensated by a series connection capacitor can automatically respond to change of load current in real time under the condition of no control; when the system fails, the controller can achieve alarm, short bypass and protection of the series connection compensation device by operating the switch.
Description
Technical field
The utility model belongs to distribution network voltage field of quality control, is specifically related to a kind of intelligent distribution series compensation device for 10kV distribution line.
Background technology
As everyone knows, distribution quality of voltage is to weigh the whether standard compliant important indicator of power supply quality, the quality of its quality is directly connected to the safety and economic operation of power consumption equipment and the normal operation of production, and along with social development, grid company and power consumer improve increasingly to the requirement of quality of voltage.Yet, the relative power transmission network of China's distribution network construction seriously lags behind, its rack is weak, facility is aging, wire diameter is little, circuit is long---especially mountain village circuit---, and distribution transformer quantity is many, even compared with multi-line with many jumbo motor or change industrial load rapidly, cause that line end voltage is low, voltage falls seriously.
The solution of in the past taking mainly contains: change load tap changer, change the wire that wire diameter is larger and adopt distributing reactive power compensation in parallel.Wherein, first method is the most conventional, but the method adjustable extent is little, can not solve the voltage problem of whole piece long transmission line; The investment cost of second method is high and to reclaim benefit low, is not suitable for solving the problem of this generality of distribution low-voltage; Often quantity is many for the parallel reactive power compensator that the third method adopts, and maintenance is large, and switch motion is frequent, and noise is large, and response speed is slow, and tends to cause the problem of when low, the underloading of voltage " during heavy duty voltage high ".
Along with the development of technology, in prior art, start to adopt Series Compensation.The Series Compensation of AC transmission system be by capacitor series in transmission line, the impedance-compensated mode that compensates transmission line induction reactance by capacitive reactance capacitor shortens the equivalent electrical distance of circuit, reduce voltage drop and merit angular difference that power delivery causes, thereby raising stability of power system, increases circuit transmission capacity.Series Compensation can significantly improve transmission line utilization ratio in power transmission network, promotes to realize the long distance of electric power, large capacity, high-efficiency transfer; Being applied to the radial distribution line that voltage is lower can improve voltage distribution situation, reduce voltage flicker.Its structure is relative simple with control, is very suitable for improving the long situation on the low side apart from distribution line terminal voltage.But several problems below the practical engineering application of Series Compensation in distribution line exists:
(1) between the distribution transformer on circuit and series capacitor, likely produce ferro resonance, jeopardize the electric equipment safety on distribution line.Existing solution is at capacitor two ends resistors in parallel, yet the method exists the excessive problem of resistor power consumption.
(2) protection of existing distribution string benefit device generally adopts the mode of metal oxide piezo-resistance (MOV) and triggered gap.Yet such protection equipment is realized complexity, volume is larger, expensive, difficult in maintenance.
(3) if string is mended device capacitor group, there are one or some capacitors damages, thereby can cause that the variation of this phase voltage and electric current causes circuit three-phase imbalance.This phenomenon can cause such as electric energy loss increase, power consumption equipment and move the problems such as influenced.
(4) can produce distribution transformer magnetizing inrush current phenomenon during line charging, this magnetizing inrush current can reach 6～10 times of transformer rated current.The magnetizing inrush current that the reclosing phenomenon of distribution line causes can cause series capacitor compensation overvoltage, thereby affects safe operation and the useful life of equipment.
(5) operating condition that existing string is mended device lacks the means of Real-time Obtaining information, comprise inputs/bypass, switch and capacitor equipment whether normally, whether secondary device normal etc.
The utility model relates to a kind of micro-electrical network and large electrical network high-voltage intelligent flexible transmission series compensation device and control method thereof.Publication number is: in the micro-electrical network of utility model patent < < of CN103050972A and greatly electrical network high-voltage intelligent flexible transmission series compensation device and control method > > thereof, also disclose a kind of series compensation device, this utility model is mainly the technical problem in the unified trend of solution, low voltage crossing ability to bear weakness that solves existing shunt compensation control device existence.The technical scheme of this utility model is: micro-electrical network and the flexible transmission of large electrical network high-voltage intelligent series compensation device, it comprises the circuit such as micro-grid side mixed active electric power dynamic filter circuit, micro-grid side parameter detecting circuit, IGCT five-level switch magnetic topological circuit, IGCT switch driving circuit, intelligent flexible transmission series compensation device DSP control circuit, wherein: it also comprises the series compensation capacitor circuit that micro-grid side and large grid side bidirectional thyristor switch are controlled.This control method is: according to detecting from micro-grid side and large grid side the parameter information obtaining, form active power regulation controlled quentity controlled variable Δ P (t)=Δ Ps (t)-Δ Pr (t) and reactive power and regulate controlled quentity controlled variable Δ Q (t)=Δ Qs (t)-Δ Qr (t), realize the control to flexible active-power P s (t) and flexible reactive power power Qs (t).Such device effect is pretty good, but structure is too complicated.
Utility model content
The purpose of this utility model is a kind of intelligent distribution series compensation device, this device has and improves distribution line voltage along the line and distribute, reduce the effect that voltage falls and improve circuit transmission capacity, and has the feature of load " self adaptation " voltage-regulation and real-time response.
In order to realize described object, a kind of intelligent distribution series compensation device of the utility model, comprise switching console switch, transducer, capacitor group, protection equipment, photo-translating system and controller, described switching console switch comprises: switching circuit breaker, and described switching circuit breaker two ends connect respectively the first isolating switch and the second isolating switch; Described transducer comprises line voltage distribution instrument transformer, current transformer and the capacitor group voltage transformer linking together; Described capacitor group is three-phase capacitor; Described protection equipment comprises: three-phase high-voltage thyristor valve, integrated damping X-bridge device and bypass contactor; described photo-translating system comprises optical-electrical converter; and be connected to controller by Transmission Fibers; described controller comprises programmable logic chip; programmable logic chip input and output side all connects level translator; wherein on the level translator of input, be connected with photoelectricity isolation and AD sampling A/D chip; the level translator of output connects photoelectricity isolation, and controller is also connected to control centre.
Preferably, described line voltage distribution instrument transformer is installed near switching console switch one end, and current transformer is connected with capacitor group, and capacitor group voltage transformer is in parallel with capacitor group.
Preferably, the main body of the every phase of three-phase high-voltage thyristor valve of described protection equipment is a pair of antiparallel controllable silicon, and every phase controllable silicon externally has two electrical connection rows; After integrated damping X-bridge device is connected respectively at three-phase high-voltage thyristor valve, be connected in the two ends of capacitor group in parallel; Bypass contactor belongs to the mechanical switch of realizing protection, is connected in equally the two ends of capacitor group in parallel.
Preferably, described integrated damping X-bridge device adopts the aluminium dilval wire coiling of high resistivity.Such structure guarantees to make integrated damping X-bridge device both to have certain resistance value, has again certain reactance value, climbing speed and the peak value of capacitor discharge current when limiting controlled silicon conducting.
Compared with prior art, the feature of the utility model device is presented as: the state that 1) controller can real-time monitoring device, comprises capacitor, protected location, each analog quantity of system and digital quantity etc.; 2) can carry out real-time communication with dispatching control center, transmission appointed information is also accepted a distant place and is controlled; 3) protection of distribution series capacitor adopts the method that controllable silicon is combined with bypass contactor, when circuit or device break down, thereby controller can trigger controlled silicon conducting by the instantaneous bypass protection of capacitor, the strings such as this protection design and MOV, triggered gap are mended protection and are compared and realize simple, economical reliable, easy to maintenance and possess the advantage that can monitor; 4) possess bypass functionality in short-term, can auto by pass capacitor group, automatically drop into again capacitor after waiting for setting-up time, can be applicable to multiple situation, as hide distribution transforming magnetizing inrush current, thereby substantially eliminate the impact of unfavorable phenomenon on device; 5) detection line light condition by series capacitor bypass, to reduce the possibility of resonance; 6) variation of Detection capacitance device capacitance in real time, sends alarm or guard signal during capacitor faults; 7) damping resistance and damping reactance are carried out to integrated design.
Accompanying drawing explanation
Fig. 1 is the integrally-built structure chart of the utility model distribution series compensation device;
Fig. 2 is the concrete structure schematic diagram of the utility model distribution series compensation device controller;
Embodiment
Take 10kV distribution as example, as shown in Figure 1, a kind of intelligent distribution series compensation device, comprise switching console switch 1, transducer 2, capacitor group 3, protection equipment 4, photo-translating system 5 and controller 6, it is characterized in that: described switching console switch 1 comprises: switching circuit breaker 1.1, described switching circuit breaker 1.1 two ends connect respectively the first isolating switch 1.2 and the second isolating switch 1.3; Described transducer 2 comprises line voltage distribution instrument transformer 2.1, current transformer 2.2 and the capacitor group voltage transformer 2.3 linking together; Described capacitor group 3 is three-phase capacitor; Described protection equipment 4 comprises: three-phase high-voltage thyristor valve 4.1, integrated damping X-bridge device 4.2 and bypass contactor 4.3, described photo-translating system 5 comprises optical-electrical converter 5.2, and is connected to controller 6 by Transmission Fibers 5.1.As shown in Figure 2, described controller 6 comprises programmable logic chip 6.1, programmable logic chip 6.1 input and output sides all connect level translator 6.2, wherein on the level translator 6.2 of input, be connected with photoelectricity isolation 6.3 and AD sampling A/D chip 6.4, the level translator 6.2 of output connects photoelectricity isolation 6.3, and controller 6 is also connected to control centre 7.Described line voltage distribution instrument transformer 2.1 is installed near switching console switch 1 one end, and current transformer 2.2 is connected with capacitor group 3, and capacitor group voltage transformer 2.3 is in parallel with capacitor group 3.The main body of three-phase high-voltage thyristor valve 4.1 every phases of described protection equipment 4 is a pair of antiparallel controllable silicon, and every phase controllable silicon externally has two electrical connection rows; After integrated damping X-bridge device 4.2 is connected respectively at three-phase high-voltage thyristor valve, be connected in the two ends of capacitor group 3 in parallel; Bypass contactor 4.3 belongs to the mechanical switch of realizing protection, is connected in equally the two ends of capacitor group 3 in parallel.Described integrated damping X-bridge device 4.2 adopts the aluminium dilval wire coiling of high resistivity.
During work, when the isolation knife of the first isolating switch 1.2 and the second isolating switch 1.3, close a floodgate, when capacitor group 3 pre-casts enter circuit, control switching circuit breaker 1.1 separating brakes, thereby make capacitor group 3 drop into circuit operation to cancel the bypass condition of capacitor group 3, line voltage distribution instrument transformer 2.1 is for measuring the line voltage of distribution line and providing energy for ups power, current transformer 2.2 is for measuring the electric current of the capacitor group of flowing through, described capacitor group voltage transformer 2.3 is in parallel with capacitor group 3, for measuring the voltage at capacitor group 3 two ends, the discharge circuit of the capacitor group 3 of also holding concurrently, three-phase high-voltage thyristor valve 4.1 carries out information interaction by photo-translating system 5 and controller 6, thereby controller 6 sends silicon controlled trigger signal by Transmission Fibers 5.1 and receives return state through gathering controllable silicon both end voltage state with judgement controlled silicon conducting state, photoelectric conversion unit 5.2 is converted to the signal of telecommunication to reach the effect of photoelectricity isolation by light signal, prevent electromagnetic interference, improve reliability and the insulating properties of the work of three-phase high-voltage thyristor valve, controller 6 is accepted analog quantity and digital quantity signal by sensing equipment 2 and photo-translating system 5, mechanical switch is closed to electronic power switch to be controlled.
Described controller part, its function specifically comprises: when the automatic switching of device, line outage or fault power-off protection, line charging, hide protection, capacitor group overvoltage protection, the monitoring of capacitor group capacitance, the resonance detection of magnetizing inrush current and protection, underloading detect and protection, send state information and alarm/guard signal, with the data interchange of control centre 7.
The fault type of device is divided into alarm, bypass in short-term, protection three classes.Wherein, alarm represents that this event does not affect device operation, and such as the auxiliary contact change of capacitor capacitance minor variations, the normal reason dead electricity of circuit, isolating switch etc., controller 6 only provides signal prompt and do not do practical operation, after bypass in short-term represents when this fault produces capacitor group to be carried out to the bypass of certain hour---can setup times setting value---, automatically put into operation again, with protection device security, circuit dead electricity for example, resonance, circuit underloading etc., when controller 6 detects after the satisfied bypass occurrence condition in short-term of device operating mode, controlling bypass contactor 4.3 closes a floodgate with by 3 bypasses of capacitor group, delay time T subsequently---can arrange, minimum 1 second, when T judges whether to reach the condition that drops into again again after the time, if satisfied control bypass contactor 4.3 separating brakes to drop into capacitor group, if do not meet, do not continue judgement until system drops into capacitor group after meeting input condition again, so can hide impulse current and the impact of overvoltage on device that reclosing or resonance produce.Protection represents that this fault degree is serious; having affected device normally works; capacitor group 3 is carried out to bypass operation; wait for that engineering staff carries out reparing fault; such as capacitor lost efficacy, controllable silicon triggers abnormal etc.; controllable silicon triggering, bypass contactor, switching circuit breaker all have the function of by-pass capacitor, and generally operating process is after triggering controlled silicon conducting, close a floodgate bypass contactor and switching circuit breaker.Protection to protected location itself, by three-phase high-voltage thyristor valve 4.1, bypass contactor 4.3, switching circuit breaker 1.1 is realized protection by set control flow.
By capacitor group voltage transformer 2.3 summation current transformers 2.2, gather by the electric current of capacitor group and the voltage at capacitor group two ends, controller is according to the capacitance of the real-time calculable capacitor group of data and monitor.If damaging, capacitor cause capacitance to change, according to amplitude of variation controller outputting alarm or guard signal.Controller has the communication module based on Modbus agreement that RS485 is interface, device is by optical cable and Surveillance center's intercommunication, real-time Data Transmission is carried out with the parameters such as running status, analog quantity and digital quantity of acquisition device in Ke Yu Surveillance center or backstage, switching order that again can receiving remote.
The foregoing is only specific embodiment of the utility model, but technical characterictic of the present utility model is not limited to this, any those skilled in the art is in field of the present utility model, and the variation of doing or modification are all encompassed among the scope of the claims of the present utility model.
Claims (4)
1. an intelligent distribution series compensation device, comprise switching console switch (1), transducer (2), capacitor group (3), protection equipment (4), photo-translating system (5) and controller (6), it is characterized in that: described switching console switch (1) comprising: switching circuit breaker (1.1), described switching circuit breaker (1.1) two ends connect respectively the first isolating switch (1.2) and the second isolating switch (1.3), described transducer (2) comprises line voltage distribution instrument transformer (2.1), current transformer (2.2) and the capacitor group voltage transformer (2.3) linking together, described capacitor group (3) is three-phase capacitor, described protection equipment (4) comprising: three-phase high-voltage thyristor valve (4.1), integrated damping X-bridge device (4.2) and bypass contactor (4.3), described photo-translating system (5) comprises optical-electrical converter (5.2), and be connected to controller (6) by Transmission Fibers (5.1), described controller (6) comprises programmable logic chip (6.1), programmable logic chip (6.1) input and output side all connects level translator (6.2), wherein on the level translator of input (6.2), be connected with photoelectricity isolation (6.3) and AD sampling A/D chip (6.4), the level translator of output (6.2) connects photoelectricity isolation (6.3), controller (6) is also connected to control centre (7).
2. a kind of intelligent distribution series compensation device as claimed in claim 1, it is characterized in that: described line voltage distribution instrument transformer (2.1) is installed near switching console switch (1) one end, current transformer (2.2) is connected with capacitor group (3), and capacitor group voltage transformer (2.3) is in parallel with capacitor group (3).
3. a kind of intelligent distribution series compensation device as claimed in claim 1, it is characterized in that: the main body of the every phase of three-phase high-voltage thyristor valve (4.1) of described protection equipment (4) is a pair of antiparallel controllable silicon, every phase controllable silicon externally has two electrical connection rows; After integrated damping X-bridge device (4.2) is connected with three-phase high-voltage thyristor valve respectively, be connected in the two ends of capacitor group (3) in parallel; Bypass contactor (4.3) belongs to the mechanical switch of realizing protection, is connected in equally the two ends of capacitor group (3) in parallel.
4. a kind of intelligent distribution series compensation device as claimed in claim 1, is characterized in that: described integrated damping X-bridge device (4.2) adopts the aluminium dilval wire coiling of high resistivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320751287.2U CN203536971U (en) | 2013-11-25 | 2013-11-25 | Series connection compensation device for intelligent distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320751287.2U CN203536971U (en) | 2013-11-25 | 2013-11-25 | Series connection compensation device for intelligent distribution network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203536971U true CN203536971U (en) | 2014-04-09 |
Family
ID=50423147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320751287.2U Expired - Fee Related CN203536971U (en) | 2013-11-25 | 2013-11-25 | Series connection compensation device for intelligent distribution network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203536971U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701135A (en) * | 2013-11-25 | 2014-04-02 | 国家电网公司 | Intelligent series compensation device for distribution network and use method of compensation device |
| CN104269859A (en) * | 2014-09-26 | 2015-01-07 | 国家电网公司 | Compensation device for distributed series capacitor |
| CN104701853A (en) * | 2014-12-31 | 2015-06-10 | 国家电网公司 | 10kV distribution network serial compensation device and control method |
| CN106230001A (en) * | 2016-09-27 | 2016-12-14 | 上海北堃电力科技有限公司 | A kind of controller of series compensation device |
| CN110460066A (en) * | 2019-08-30 | 2019-11-15 | 常州博瑞电力自动化设备有限公司 | A kind of box distribution series compensation device |
-
2013
- 2013-11-25 CN CN201320751287.2U patent/CN203536971U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701135A (en) * | 2013-11-25 | 2014-04-02 | 国家电网公司 | Intelligent series compensation device for distribution network and use method of compensation device |
| CN104269859A (en) * | 2014-09-26 | 2015-01-07 | 国家电网公司 | Compensation device for distributed series capacitor |
| CN104701853A (en) * | 2014-12-31 | 2015-06-10 | 国家电网公司 | 10kV distribution network serial compensation device and control method |
| CN106230001A (en) * | 2016-09-27 | 2016-12-14 | 上海北堃电力科技有限公司 | A kind of controller of series compensation device |
| CN106230001B (en) * | 2016-09-27 | 2019-07-02 | 上海北堃电力科技有限公司 | A kind of controller of series compensation device |
| CN110460066A (en) * | 2019-08-30 | 2019-11-15 | 常州博瑞电力自动化设备有限公司 | A kind of box distribution series compensation device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103701135A (en) | Intelligent series compensation device for distribution network and use method of compensation device | |
| CN101807799B (en) | Super capacitor energy storage type power quality compensator | |
| CN202103478U (en) | Comprehensive intelligent distribution box | |
| CN203536971U (en) | Series connection compensation device for intelligent distribution network | |
| CN202652141U (en) | Coal feeder frequency converter low voltage crossover device | |
| CN101873010A (en) | Intelligent monitoring terminal of electric distribution system | |
| CN104701853A (en) | 10kV distribution network serial compensation device and control method | |
| CN106655218A (en) | Hybrid filtering compensation device | |
| CN101299541B (en) | Supervoltage magnetic-controlled shunt reactor excitation equipment | |
| CN105552928A (en) | Series-connection/parallel-connection hybrid capacitor compensation apparatus for 10kV power distribution line | |
| CN205565727U (en) | Hoisting device is synthesized to rural power grids low -voltage on post | |
| CN203243056U (en) | High/middle-voltage reactive compensation composite structure | |
| CN201345506Y (en) | Intellectualized power distribution cabinet | |
| CN203014389U (en) | High-voltage reactive power automatic compensation device | |
| CN202159979U (en) | Intelligent reactive power adjustment and compensation device | |
| CN206850446U (en) | A kind of intelligent load-balancing regulator | |
| CN2938505Y (en) | Intelligent reactive compensation distribution box | |
| CN103280793B (en) | Based on the electrical network earthing compensation device of arc suppression transformer | |
| CN103326373B (en) | Dynamic reactive power compensation device suitable for multiple-direct-current feed-in grid and control method of dynamic reactive power compensation device | |
| CN206194030U (en) | High pressure prepayment device and system | |
| CN204271652U (en) | 10kV distribution series compensation device | |
| CN103166249B (en) | A kind of rapid combination system safety stable control method | |
| CN201742167U (en) | Intelligent monitoring terminal of power distribution system | |
| CN203813519U (en) | Centralized-control intelligent power distribution cabinet | |
| CN201838536U (en) | Self-power supply type digital relay |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20191125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |