CN2852486Y - Automatic compensation device for full-automatic high-voltage parallel capacitor - Google Patents
Automatic compensation device for full-automatic high-voltage parallel capacitor Download PDFInfo
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- CN2852486Y CN2852486Y CN 200520106250 CN200520106250U CN2852486Y CN 2852486 Y CN2852486 Y CN 2852486Y CN 200520106250 CN200520106250 CN 200520106250 CN 200520106250 U CN200520106250 U CN 200520106250U CN 2852486 Y CN2852486 Y CN 2852486Y
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Abstract
The utility model relates to an automatic compensation device for full-automatic high-voltage parallel capacitors, wherein a main body is a compensation cabinet; a cabinet body is composed of two individual compartments; a casing of the cabinet body is made of thin aluminum coating zinc steel plates or cold roll steel plates which are assembled after multiple edge folding via a CNC machine tool; a discharge coil and a capacitor (5) in the cabinet body are connected in parallel together; a vacuum contactor (1), a fuse (3), the capacitor (5) and a reactor (10) are connected in series together; a controller (11) is connected with a voltage transformer and a current transformer through sampling ports; the controller is connected with a relay of the controller through a control port. The opening and the closing of the relay control the opening and the closing of the vacuum contactor (1), so a capacitor set with different electric capacities is connected into a power network according to different power factors. The utility model has the advantage of high safety, completely realizes full-automatic operation, has the functions of voice prompt, operation record, etc.
Description
Technical field
This use is novel to relate to a kind of full-automatic high-pressure shunt capacitor autocompensation installation, and belonging to rated voltage specifically is 3.6kV～12kV, the indoor high-voltage controller switching equipment field of three-phase alternating current 50Hz.
Background technology
Transformer station particularly such as in the place of industrial and mining enterprises, power factor deficiency in order to satisfy the power system reactive power equilibrium of supply and demand, improves the supply power voltage quality, reduces the loss of electric energy, and often needs to adopt compensation and voltage regulating device.In compensation and voltage regulating device in the past, mostly adopt the switching action of manual control capacitor group, very inconvenience of operation for this reason.Now mostly based on the full-automatic device of automatic Regulation, as domestic first-elected specialized high-pressure reactive compensation and voltage regulating device.
Our company is engaged in the research and development and the production of high-tension distribution equipment for many years, know very well in practice because the computer of control centre is different from general electronic circuit, when being interfered, can cause the program confusion, so computer equipment all has " a resetting " key, when " deadlock " occurring, need manually click " resetting " key.But transformer station's control device can produce the output relay misoperation if " deadlock " occur, causes the accident.Traditional solution is to strengthen the isolation of computer circuits and external circuit, but this can not thoroughly solve the problem of reliability and distribution precision.The product of our company has solved all from theory and practice and has caused insecure reason.The compensation arrangement that is proposed by at the most 8 groups can automatic switching capacitor group constitute, can carry out the automatic Regulation of the power factor compensation and the main transformer of electrical network simultaneously.
Summary of the invention
The purpose of this utility model provides the full-automatic power capacitor reactive compensation installation that a kind of capacitance of each capacitor group does not wait;
Another purpose of the present utility model provides a kind of reliability height, can guarantee safe power capacitor reactive compensation installation;
Another purpose of the present utility model provides a kind of full automation and regulates and general wide, practical full-automatic high-pressure shunt capacitor autocompensation installation;
Another purpose of the present utility model provides a kind of full-automatic compensation arrangement that adopts advanced electric capacity control algolithm and have statistics, record, failure diagnosis and sound prompt function.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions:
A kind of full-automatic high-pressure shunt capacitor autocompensation installation, this apparatus main body is a compensating cabinet, cabinet is made of 2 independent compartments, and the shell of cabinet is selected for use aluminizing zinc sheet metal or cold-rolled steel sheet to assemble behind CNC (Computerized Numerical Control computer Numerical Control) the multiple flanging of lathe and made; There is the display floater of controller 11 in the front of cabinet, instrument door 13, cabinet body door 12, observation window 14 and electromagnetic lock 15; Be connected in parallel with capacitor group 5 at cabinet internal discharge coil, vacuum contactor 1, fuse 3, capacitor group 5 and reactor 10 are connected in the mode of polyphone; It is characterized in that controller 11 is connected with the voltage transformer summation current transformer by its sample port; The relay of controller by its control port and controller self is connected, relay deciliter control vacuum contactor 1 deciliter; Controller also is connected with warning system by the warning port.
This device comprises a plurality of control ports, and each control port all connects the switching that a relay is controlled a group capacitor.
The controller 11 of this device can connect and control the capacitor group 5 that 1-8 group can automatic switching, and each capacitor group all places independent cabinet, and each capacitor volume does not wait.Controller 11 is by warning port output alarm signal, and this alarm signal is that voice or picture and text show.
Warning system comprises loud speaker.Controller 11 also has big screen LCD.Its middle controller 11 also comprises the control computer.
Transformer on-load voltage regulating shunting switch in its middle controller 11 and the electrical network is electrically connected.
This device also includes the manual control button of capacitor panel switching, and the manual control button of this capacitor panel switching also is installed on the guidance panel of first cabinet of capacitor group.
This device has the security reliability height, realizes the beneficial effect of fully automatic operation fully.
Description of drawings
Fig. 1 is this compensation arrangement private side view;
Fig. 2 is the front view of compensation arrangement;
The voltage power-less comprehensive criterion figure of Fig. 3 for adopting in the electric capacity control algolithm;
Fig. 4 is the workflow diagram of controller;
Fig. 5 is a controller panel;
Fig. 6 is the shown function of tonic chord menu of controller display screen;
Fig. 7 is the shown logout interface of controller display screen;
Fig. 8 is the shown wrong display interface of controller display screen;
The compensation arrangement of Fig. 9 for can automatic switching capacitor group constituting by 3 groups.
Embodiment
To describe full-automatic high-pressure shunt capacitor autocompensation installation of the present utility model hereinafter in conjunction with the accompanying drawings in detail.
This device for its operation principle of autocompensation installation is: the voltage transformer summation current transformer is set on bus, accept the secondary voltage signal summation current transformer secondary current signal of bus-bar potential transformer by the controller in this capacitor autocompensation installation, and calculate reactive power according to recording the result, reactive power, magnitude of voltage and reactive voltage criterion are compared, determine whether controlling one or more groups Shunt Capacitor Unit branch road of switching, come steady line voltage.
As shown in Figure 1, the main body of this full-automatic high-pressure shunt capacitor autocompensation installation is a compensating cabinet, has main bus bar 6 to import on the top of cabinet, and main bus bar 6 is fixed on the crossbeam through insulator 7.Vacuum contactor 1 places the rear portion upside of cabinet, and is electrically connected with fuse 3, capacitor 5 and reactor 10 successively, also disposes lightning arrester 8, discharge coil 9 and wall bushing 2 in addition and is flexible coupling 4.Discharge coil keeps in parallel with capacitor.The discharge coil effect mainly is when capacitor and electrical network disconnection the residual charge in the capacitor to be discharged.The reactor effect is a threshold currents, the harmonic elimination ripple.The fuse effect is fusing when element short circuit of cabinet inner high voltage or overload, guarantees power grid security.Voltage transformer or current transformer also are installed on the corresponding component in cabinet,, in Fig. 1, just are not shown specifically because the instrument transformer technology is well known to those skilled in the art.
Fig. 2 is the front view of this compensation arrangement, mainly is made up of the door and the observation window etc. of cabinet.At the top is the display floater of controller 11 and the instrument door 13 of each Displaying Meter, and the bottom is the observation window 14 and the electromagnetic lock on door 12 and door 12 next doors.
The operation principle of coming description control device 11 below in conjunction with Fig. 3 and Fig. 4.The voltage transformer summation current transformer of above mentioning all is connected on the controller 11, controller 11 at first detects the secondary voltage signal of voltage transformer, at the secondary current signal that detects current transformer, calculate reactive power according to detected secondary voltage value and secondary current value, again the reactive power that calculates and magnitude of voltage are placed in the reactive voltage comprehensive criterion and compare, and send throwing, cut instruction, thereby stablize line voltage according to comparative structure.
The capacitor group that the utility model adopts capacitance not wait, improved control precision greatly in the situation that adopts the same electrical capacity, illustrate below by concrete example: the capacitor in each cabinet is called an independent capacitor group, cabinet is compared with cabinet, capacity of capacitor bank wherein can be identical, also can be different.Both 1# cabinet capacity was 1000kvar, and the 2# cabinet can be 1000kvar, also can be 300var, and remaining cabinet capacity also is like this, can be consistent, also can be inconsistent, and such benefit is: compensation precision is higher.
For example: 4 capacitor panels, the cabinet capacity is respectively 1#:1000kvar, 2#:800kvar, 3#:400kvar, 4#:200kvar.If the result who obtains after the controller sampling is calculated is: need to drop into 2000kvar, control 1# so, 2#, the contactor of 4# cabinet moves and inserts, and just can meet the demands.If it all is 600kvar that 4 cabinet capacity of this moment equate, controller only can drop into the wherein capacitor group of 3 cabinets in order only to mend so.Compensation capacity is 1800kvar so.
Above example though the capacity of 2 compensation arrangement capacitor groups all is 2400kvar, does not wait the compensation arrangement compensation precision height that holds as can be seen.
In order to realize the switching operation to a plurality of capacitor panels, selected controller has several ports: 1 sample port, 2 control ports, 3 warning ports
1 sample port: with the voltage transformer summation current transformer adopt voltage and current signal input, calculate by controller, whether the power factor of confirming electrical network in prescribed limit.
2 control ports: the relay by controller self closes the branch that closes of assigning to control high voltage connector, the connection and the disconnection of control high voltage reactor and high-voltage capacitor group and electrical network.If power factor is not in prescribed limit, it makes high voltage connector close the branch action action, and contactor closes a floodgate will make capacitor group or reactor input, and separating brake will make capacitor group or reactor excision electrical network, and power factor is remained in the prescribed limit.
3 warning ports: when the fault of controller own or electrical network breaks down or compensation arrangement in electric elements output alarm signal when breaking down, can be voice and dry contact.
Reactive voltage comprehensive criterion figure below in conjunction with Fig. 3 further describes the process that controller is judged.Reactive power is expressed as Q among the figure, and the Q upper limit and Q lower limit are respectively two broken lines, and magnitude of voltage is expressed as U in addition, and the U upper limit and U lower limit are respectively two straight lines, and these four lines will be divided into nine zones, and a kind of system running state is all represented in each zone.And the principle of control is to regulate the load tap changer and the switched capacitor of carrying arranged, and systems attempt is run in the zone zero.Each regional control law is as follows:
1) zone zero: idle all qualified with voltage, do not regulate;
2) zone one: the idle upper limit more, voltage is got over lower limit, throws the capacitor group; When the capacitor group all drops into, send out the instruction of boosting; When on load tap changer is in upper limit position, send out the strong capacitor group instruction of throwing;
3) zone two: the idle upper limit more, voltage is qualified, throws the capacitor group;
4) zone three: the idle upper limit more, voltage is got over the upper limit, sends out the step-down instruction; When loaded switch is in the lower position, sends out and cut the instruction of capacitor group by force;
5) zone four: idle qualified, voltage is got over the upper limit, sends out the step-down instruction; When loaded switch is in the lower position, sends out and cut the instruction of capacitor group by force;
6) zone five: idle lower limit more, voltage is got over the upper limit, sends out and cuts the instruction of capacitor group; When capacitor group complete resection, send out the step-down instruction;
7) zone six: idle lower limit more, voltage is qualified, sends out and cuts the instruction of capacitor group;
8) zone seven: idle lower limit more, voltage is got over lower limit, sends out the instruction of boosting; When loaded switch is in upper limit position, send out the strong capacitor group instruction of throwing;
9) zone eight: idle qualified, voltage is got over lower limit, sends out the instruction of boosting; When loaded switch is in upper limit position, send out the strong capacitor group instruction of throwing.
Also have a kind of voltage power-less simplex criteria:
Simplex criteria is applicable to and do not use on load tap changer, but the operational mode by the indirect pressure regulation of switched capacitor.:
1) zone zero: voltage and idle all qualified, do not regulate;
2) zone seven, eight: voltage is got over lower limit, throws the capacitor group by force;
3) zone five, four, three: voltage is got over the upper limit, cuts the capacitor group by force;
4) zone six: idle lower limit more, voltage is qualified, sends out and cuts the instruction of capacitor group;
5) zone two: the idle upper limit more, voltage is qualified, sends out the instruction of throwing capacitor group.
Can also use the power factor criterion in addition:
1)L_V+L_ΔU≤U≤H_V-H_ΔU
2)cosf1＜L_PF
3)cosf2＜H_PF
4)I＞L_I
Wherein, L_V is under-voltage definite value,
H_V is the overvoltage definite value,
L_ Δ U is under-voltage return difference,
H_ Δ U is the overvoltage return difference,
L_PF is the input definite value,
H_PF is the excision definite value,
L_I is the undercurrent definite value,
U, I are actual voltage, electric current,
Cosf1 is the measured power factor before electric capacity drops into,
Cosf2 is the calculated value of the power factor behind the input next stage electric capacity under the current load condition.
When satisfying following arbitrary condition, electric capacity excision (Q1: the reactive power of actual measurement)
A) U≤L_V or U 〉=H_V
b)Q1≤0
c)I≤L_I
d)cosf1≥H_PF
When satisfying following arbitrary condition, electric capacity drops into function locking (can excise electric capacity this moment)
a)L_U＜U＜L_U+L_ΔU
B) H_U＞U＞H_U-H_ Δ U (meaning of each parameter is the same)
Capacitor is not suitable for above-mentioned condition when throwing by force or cutting by force.
Also have the on-load voltage regulation criterion in addition:
The criterion of boosting is as follows:
a)80％V＜U＜L_V
b)MAX(I1，I2)＜Id
The criterion of step-down is as follows:
a)H_V＜U＜120％V
b)MAX(I1，I2)＜Id
I1, I2 are respectively one, two main transformer running currents,
Id is a pressure regulation latching current definite value.
High reliability is one of purpose of this device, reliability problems is owing to computer causes, computer is different from general electronic circuit, when being interfered, can cause the program confusion, so computer equipment all has " a resetting " key, when " deadlock " occurring, need manually click " resetting " key.Transformer station's control device can produce the output relay misoperation if " deadlock " occur, causes the accident.Traditional solution is to strengthen the isolation of computer circuits and external circuit, but this can not thoroughly solve integrity problem.This product has solved all from theory and practice and has caused insecure reason.
Control circuit at this device has high antijamming capability, stops interference signal to enter computer to greatest extent, installs all external binding posts and all can bear the voltge surge of kilovolt and not influence operate as normal.Used distinctive " software cyberdog " circuit and fault-toleranr technique, automatically discovery procedure run-time error and moment the computer that automatically resets, thoroughly solved " deadlock " problem, so this product does not have " resetting " key.In order to prevent also may to produce the phenomenon that the output relay misoperation causes the accident after electronic circuit itself from damaging; this machine is equipped with exclusive " hardware circuit fault secure circuit ", guarantees that the interior circuit arbitrarily of microcomputer damages the back or " deadlock " moment can not caused the output misoperation.Above-mentioned technology also be ability in the technical staff be familiar with, just give unnecessary details no longer one by one once more.
Microcomputerized controller adopts big screen LCD, and graphical interfaces, Chinese show and operation indicating that menu mode is selected, six button operations, and use is simple, and operating personnel need not training.The design style of " user-friendly camera ", simple, practical individual character.Do not need human intervention fully when moving automatically, the loud speaker of configuration can automatic speech prompting when going wrong.
The part working interface of controller display illustrates respectively in Fig. 6, Fig. 7 and Fig. 8, Figure 6 shows that the interface of main menu of controller; Figure 7 shows that the record interface of controller to Action Events; Fig. 8 then is the miscue interface, has fully represented the function that this device detects automatically to mistake.
Figure 9 shows that the situation of these device configuration 3 tunnel capacitance group, certainly this full-automatic high-pressure shunt capacitor autocompensation installation can install and control the controller (not shown) of No. 8 capacitor groups at most, used controller be used in the electrical network to Shunt Capacitor Unit, shunt reactor group, transformer on-load voltage regulating shunting switch control separately or Comprehensive Control to satisfy the power system reactive power equilibrium of supply and demand, improve the supply power voltage quality, reduce the automatic regulating equipment of electric energy loss.The switching of the every road of control device capacitor group all is to be finished automatically by controller, if the controller set-up mode is manually, then can manually carry out the switching action of capacitor group.In general, the manual control button of capacitor automatic control equipment (controller 11) and capacitor panel switching all is installed on the guidance panel of capacitor group first cabinet, and this device is to realize full-automatic compensation arrangement certainly.
Above-listed detailed description is specifying at part possible embodiments of the present utility model, only this embodiment is not in order to limit claim of the present invention, allly do not break away from equivalent embodiment or the change that skill spirit of the present invention is made, for example, equivalence embodiment Deng changing all should be contained in the claim of this case.
Claims (6)
1, a kind of full-automatic high-pressure shunt capacitor autocompensation installation, this apparatus main body is a compensating cabinet, and cabinet is made of 2 independent compartments, and the shell of cabinet selects for use the assembly unit behind the multiple flanging of CNC lathe of aluminizing zinc sheet metal or cold-rolled steel sheet to make; There is the display floater of controller (11) in the front of cabinet, instrument door (13), cabinet body door (12), observation window (14) and electromagnetic lock (15); Be connected in parallel with capacitor (5) at cabinet internal discharge coil; Vacuum contactor (1), fuse (3), capacitor (5) and reactor (10) are connected in the mode of polyphone; It is characterized in that:
Controller (11) is connected with the voltage transformer summation current transformer by its sample port; The relay of controller by its control port and controller self is connected, relay deciliter control vacuum contactor (1) deciliter; Controller also is connected with warning system by the warning port.
2, according to the full-automatic high-pressure shunt capacitor autocompensation installation of claim 1, wherein this device comprises a plurality of control ports, and each control port all connects the switching that a relay is controlled a group capacitor group (5).
3, according to the full-automatic high-pressure shunt capacitor autocompensation installation of claim 1, wherein the controller of this device (11) can connect and control the capacitor group (5) that 1-8 group can automatic switching, each capacitor group all places independent cabinet, and the capacity of each capacitor group can equate or unequal.
4, according to the full-automatic high-pressure shunt capacitor autocompensation installation of claim 1 or 2, its middle controller (11) is by warning port output alarm signal, and this alarm signal is that voice or picture and text show or switching value.
5, according to the full-automatic high-pressure shunt capacitor autocompensation installation of claim 1 or 2, the transformer on-load voltage regulating shunting switch in its middle controller (11) and the electrical network is electrically connected.
6, according to the full-automatic high-pressure shunt capacitor autocompensation installation of claim 1 or 2, wherein this device also includes the manual control button of capacitor panel switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520106250 CN2852486Y (en) | 2005-08-26 | 2005-08-26 | Automatic compensation device for full-automatic high-voltage parallel capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520106250 CN2852486Y (en) | 2005-08-26 | 2005-08-26 | Automatic compensation device for full-automatic high-voltage parallel capacitor |
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| Publication Number | Publication Date |
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| CN2852486Y true CN2852486Y (en) | 2006-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520106250 Expired - Lifetime CN2852486Y (en) | 2005-08-26 | 2005-08-26 | Automatic compensation device for full-automatic high-voltage parallel capacitor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082438A (en) * | 2009-11-26 | 2011-06-01 | 珠海市伏安达电子科技有限公司 | Intelligent automatic reactive power compensation cabinet |
| CN102157947A (en) * | 2010-12-10 | 2011-08-17 | 广东电网公司佛山供电局 | Application of capacitor integrated online monitoring technology in high-voltage reactive power compensation device |
| CN108418227A (en) * | 2018-05-18 | 2018-08-17 | 核工业理化工程研究院 | A kind of autocompensation installation and its compensation method based on PLC controls |
-
2005
- 2005-08-26 CN CN 200520106250 patent/CN2852486Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082438A (en) * | 2009-11-26 | 2011-06-01 | 珠海市伏安达电子科技有限公司 | Intelligent automatic reactive power compensation cabinet |
| CN102157947A (en) * | 2010-12-10 | 2011-08-17 | 广东电网公司佛山供电局 | Application of capacitor integrated online monitoring technology in high-voltage reactive power compensation device |
| CN108418227A (en) * | 2018-05-18 | 2018-08-17 | 核工业理化工程研究院 | A kind of autocompensation installation and its compensation method based on PLC controls |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150826 Granted publication date: 20061227 |
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| EXPY | Termination of patent right or utility model |