CN108418227A - A kind of autocompensation installation and its compensation method based on PLC controls - Google Patents
A kind of autocompensation installation and its compensation method based on PLC controls Download PDFInfo
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- CN108418227A CN108418227A CN201810481748.6A CN201810481748A CN108418227A CN 108418227 A CN108418227 A CN 108418227A CN 201810481748 A CN201810481748 A CN 201810481748A CN 108418227 A CN108418227 A CN 108418227A
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- Prior art keywords
- group
- relay
- contactor
- compensation
- controller
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Classifications
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- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
-
- 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
Include acquisition module the invention discloses a kind of autocompensation installation based on PLC controls and its compensation method, with the controller of acquisition module communication connection, and the execution module controlled by the controller, wherein, the controller is PLC controller, the compensation capacitor group that the execution module includes relay group and matches the contactor group of connection with the relay group and be correspondingly arranged with the contactor group, compensation capacitor group can be cut by circuit using the compensation method automatically, it is easy to use.
Description
Technical field
The invention belongs to electric power network technical fields, and in particular to it is a kind of based on PLC control autocompensation installation and its
Compensation method.
Background technology
Frequency converter is as motor driving apparatus, and more than the number of motors and when running frequency is relatively low, frequency converter needs additional compensation
Reactive power improves the power-factor of load, promotes the operational efficiency of frequency converter.It is typically employed in load end parallel connection certain capacity electricity
Container realizes the compensation of reactive power, and needs artificially to cut capacitance manually, when motor rises to certain rotating speed, to cut off compensation electricity
Hold.The input of compensating electric capacity and excision there are larger hysteresis quality and need operating personnel voluntarily to judge, reliability and safety
It is relatively low.
The above-mentioned prior art has the following disadvantages；
1, it when frequency converter needs additional increase compensating power, needs to be manually operated, manual switching capacitance, response speed
Degree is slow.
2, it during increasing compensating electric capacity, needs operating personnel to judge to increase compensating electric capacity, easy tos produce prodigious mistake
Difference.
3, increase compensating electric capacity manually, the personal safety of operating personnel cannot guarantee that.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of autocompensation installations based on PLC controls.
It is a further object of the invention to provide a kind of autocompensation installation based on PLC controls and its compensation methodes.
The present invention is achieved by the following technical solutions：
It is a kind of based on PLC control autocompensation installation include：Acquisition module, the control with acquisition module communication connection
Device processed, and the execution module by controller control, wherein the controller is PLC controller, the execution module packet
The compensation for including relay group and matching the contactor group of connection with the relay group and being correspondingly arranged with the contactor group
Capacitor group.
In the above-mentioned technical solutions, the acquisition module includes the A/D converter that collecting unit is connected with series connection with it, institute
It states A/D converter and is connected to the controller.
In the above-mentioned technical solutions, the relay group includes multiple relays, and the multiple relay is connected in parallel
On the controller, the contactor group includes multiple and the one-to-one contactor of relay.
In the above-mentioned technical solutions, the compensation capacitor group includes multiple and the one-to-one compensating electric capacity of contactor
Device, wherein the compensation capacitor LB3 is by three compensating electric capacity LB3-C1 being connected in parallel respectively in triple line, compensation electricity
Hold LB3-C2 and compensating electric capacity LB3-C3 compositions.
In the above-mentioned technical solutions, further include protection circuit contactor QR1, inductor, capacitance group and reverse-blocking tetrode thyristor group.
In the above-mentioned technical solutions, the capacitance group includes the capacitor LB1 being connected in parallel and capacitor LB2, the electricity
Container LB1 is made of three the capacitance LB1-C1 being connected in triple line, capacitance LB1-C2 and capacitance LB1-C3, the electricity
Container LB2 is made of three the capacitance LB2-C1 being connected in triple line, capacitance LB2-C2 and capacitance LB2-C3.
In the above-mentioned technical solutions, the inductor includes three the inductance L4 being connected in triple line, inductance L5
With inductance L6, the inductor is arranged between the protection circuit contactor QR1 and the capacitance group, the reverse-blocking tetrode thyristor
Group includes three the reverse-blocking tetrode thyristor S10 being connected in triple line, reverse-blocking tetrode thyristor S11 and reverse-blocking tetrode thyristor S12.
In the above-mentioned technical solutions, further include power module XT2, the power module XT2 for providing DC voltage
For ups power.
In the above-mentioned technical solutions, six feet that the relay of the relay group is connected to by three in triple line after
Electric appliance forms, and the relay is powered by power module XT2, wherein the pin 5 and pin 6 of each six feet relay
It is connected with power module XT2, the pin 1 and pin 2 of the six feet relay are normally-closed contact, and the six feet relay draws
Foot 3 and pin 4 are normally opened contact, and multiple contactors of the contactor group are powered by 220V AC voltage source TX5, wherein
It is controlled by the pin 3 and pin 4 of the six feet relay between the 220V AC voltage source TX5 and the contactor QR3
Connection, the contactor QR3 are eight contact devices.
In the above-mentioned technical solutions, the compensation capacitor LB3, the contactor QR3 and the relay form main benefit
Repay circuit, wherein the both ends of the compensating electric capacity LB3-C1, the both ends of the compensating electric capacity LB3-C2 and the compensating electric capacity
The both ends of LB3-C3 are connected in parallel multiple secondary compensation circuits, and the pair compensation circuit is the compensation capacitor and the benefit
The relay of the contactor and the control contactor of repaying capacitor connection corresponds the circuit of composition.
A kind of compensation method of autocompensation installation based on PLC controls includes the following steps：
1) voltage-frequency signal on the power grid of acquisition module acquisition frequency converter output, and the voltage-frequency signal is transmitted
To PLC controller；
2) PLC controller judges whether to need compensation capacitor group；
3) PLC controller control relay group work, relay group control corresponding contactor group work, and will compensation electricity
Container group accesses.
The advantages of the present invention are：
1, a kind of autocompensation installation and its compensation method based on PLC controls of the invention can realize automatic compensation electricity
The switching of container, fast response time.
2, a kind of autocompensation installation and its compensation method based on PLC controls of the invention are judged using controller
Increase compensation capacitor, the application condition of generation is small.
3, a kind of autocompensation installation and its compensation method based on PLC controls of the invention can increase compensation electricity automatically
Container, safe operation, easy disassembly are easy to use.
Description of the drawings
Fig. 1 is a kind of circuit structure diagram of autocompensation installation based on PLC controls of the present invention.
Fig. 2 is a kind of work flow diagram of the controller of autocompensation installation based on PLC controls of the present invention.
Fig. 3 is a kind of circuit structure diagram of autocompensation installation based on PLC controls of the present invention.
It for those of ordinary skill in the art, without creative efforts, can be according to above attached
Figure obtains other relevant drawings.
Specific implementation mode
In order to enable those skilled in the art to better understand the solution of the present invention, furtherly with reference to specific embodiment
Bright technical scheme of the present invention.
Embodiment one
As shown in Figs. 1-3, a kind of autocompensation installation based on PLC controls includes acquisition module, is communicated with acquisition module
The controller of connection, and the execution module that is controlled by the controller, wherein controller is PLC controller, execution module include after
Electric appliance group and the compensation capacitor group for matching the contactor group of connection with relay group and being correspondingly arranged with contactor group.
A kind of autocompensation installation based on PLC controls of the present invention acquires the output voltage of frequency converter using acquisition module
Signal, and transmitting the signal in controller, the output voltage signal of the frequency converter that controller is acquired according to acquisition module from
It is dynamic to judge whether to need compensating power, and by the judgement signal transmission to execution module, execution module is acted, automatically
Compensation capacitor acts, fast response time, can realize the operation for completing to automatically control compensation capacitor in 200ms, realize
The dynamic of power factor compensates.
Further, acquisition module includes the A/D converter that collecting unit is connected with series connection with it, and A/D converter is connected to
Controller, wherein collecting unit can collect three single phase ac frequency signals on the power grid of frequency converter output, and should
A-c cycle signal is converted into sine squared pulse signal, which is passed to A/D and converted by collecting unit
Device, the sine squared pulse signal of acquisition calculate and result of calculation is transmitted to controller by A/D converter, for controller
Judge whether to increase compensation capacitor group and increase the amount of compensation capacitor to adopt in addition, collecting unit is AC voltage sensor
It is used cooperatively with collecting unit and A/D converter, so that collected a-c cycle signal is directly changed into controller and identify
Signal, it is easy to use.
Further, relay group includes multiple relays, and multiple relays are connected in parallel on the controller, contactor group
Including multiple with the one-to-one contactor of relay, the relay of relay group by three be connected in triple line six
Foot relay forms, and relay is powered by power module XT2, wherein the pin 5 and pin 6 of each six foot relay and electricity
Source module XT2 is connected, and the pin 1 and pin 2 of six foot relays are normally-closed contact, and the pin 3 and pin 4 of six foot relays are
Multiple contactors of normally opened contact, contactor group are powered by 220V AC voltage source TX5, wherein 220V AC voltage source TX5
It being controlled and is connected by the pin 3 and pin 4 of six foot relays between contactor QR3, contactor QR3 is eight contact devices,
Wherein, relay is connected by the DC-voltage supply of 24V, wherein six contacts (QR3-T1-L1, QR3-T2-L2 of contactor
And QR3-T3-L3) be connected in triple line with compensation capacitor respectively, other two contact portion coil and difference of relay
It is connected with the pin 3 of six foot relays and pin 4.Further, multiple relays are all connected on the controller, and are controlled
Device controls and selects a selection, each relay matches with each contactor and each relay controls each and contacts
Device is disconnected or is accessed using contactor control compensation capacitor, realizes the function of automatic compensating electric capacity.
Further, compensation capacitor group is made of multiple compensation capacitors, wherein each contactor corresponds to control one
Compensation capacitor, wherein compensation capacitor LB3 is by three compensating electric capacity LB3-C1 being connected in parallel respectively in triple line, benefit
Repay capacitance LB3-C2 and compensating electric capacity LB3-C3 compositions, compensating electric capacity LB3-C1, compensating electric capacity LB3-C2 and compensating electric capacity LB3-
C3 is connected in series in six contacts (QR3-T1-L1, QR3-T2-L2 and QR3-T3-L3) of contactor in triple line respectively,
In, the capacitance of compensation capacitor LB3 is 30u F, in addition, the compensating electric capacity LB3-C1 of compensation capacitor LB3, compensating electric capacity
LB3-C2, compensating electric capacity LB3-C3, contactor and relay form main compensation circuit, wherein the both ends of compensating electric capacity LB3-C1,
The both ends of compensating electric capacity LB3-C2 and the both ends of compensating electric capacity LB3-C3 are connected in parallel multiple secondary compensation circuits, secondary compensation circuit
The relay of the contactor and control contactor that are connect for compensation capacitor, with compensation capacitor corresponds the electricity of composition
Road.Further, controller can carry out judging whether to need to increase compensation electricity according to the result of calculation of the A/D converter received
Container and the amount for increasing compensation capacitor, controller select a relay startup or multiple relays according to judging result
Start, i.e., selection increases main compensation circuit or main compensation circuit and multiple secondary compensation circuits meet the need of compensating power
It asks, realizes the function of compensating automatically, it is easy to use.
Embodiment two
As shown in Figs. 1-3, based on embodiment one, it is a kind of based on PLC control autocompensation installation include relay
Group, contactor group and compensation capacitor group, specific implementation mode are as follows：
One end of acquisition module is connected on the power grid of the voltage of frequency converter output, and the other end of acquisition module is connected to control
On device processed, wherein collecting unit acquires three single phase frequency signals on power grid, and three-phase frequency signal is converted to three sines
Square-wave pulse signal, and by three sine squared pulse signal transmissions to A/D converter, A/D converter is by collected three
A sine squared pulse signal carries out software and calculates operation and operation result is transmitted to controller, and controller is according to receiving
Operation result judges whether to need to increase the power voltage supply machine normal use that reactive power ensures frequency converter output, and controller
It is calculated by software program and needs increased reactive power amount, need to increase compensating electric capacity when needing to increase reactive power
Device, when needing to increase compensation capacitor (starting main compensation circuit) by software program calculating, controller controls relay
A relay power in device group starts, and the coil that matched contactor is controlled after relay power is powered, contactor
Six contacts connection, make three compensating electric capacity LB3-C1, compensating electric capacity LB3-C2 and the benefits being connected in parallel of compensation capacitor
It repays capacitance LB3-C3 to be connected in triple line, capacitance LB1-C1, capacitance LB2-C1 and compensating electric capacity LB3-C1 is made to form one group of star
Type compensating electric capacity, capacitance LB1-C2, capacitance LB2-C2 and compensating electric capacity LB3-C2 form one group of star-like compensating electric capacity, capacitance LB1-
C3, capacitance LB2-C3 and compensating electric capacity LB3-C3 form one group of star-like compensating electric capacity, realize the function of automatic compensating electric capacity, reach
The effect of additional increase compensating power is arrived.
When controller needs to increase multiple compensation capacitors by software program calculating, i.e. controller control starts multiple
Secondary compensation circuit is used cooperatively with main compensation circuit, has achieved the purpose that control accesses different compensating electric capacity amounts.
The present invention it is a kind of based on PLC control autocompensation installation using relay control contactor coil be powered into
And control access and disconnect compensation capacitor, whether need to increase compensation capacitor using controller automatic decision, and calculate and sentence
The disconnected amount for needing to increase compensation capacitor, by the work(for being automatically replenished capacitance with the use of realization with acquisition module and execution module
Can, main compensation circuit is controlled using controller or secondary compensation circuit realization increases the mesh of different additional compensation capacitances automatically
, it ensure that frequency converter can automatically compensate for reactive power, improve the power-factor of load, improve the operation effect of frequency converter
Rate, and the fast response time of the device ensure that the voltage of frequency converter output can meet the need of motor normal operation always
It wants, is not necessarily to staff in the process and operates, it can be ensured that power supply system safe operation.
Embodiment three
As shown in Figs. 1-3, a kind of autocompensation installation based on PLC controls further includes protection circuit contactor QR1, inductance
Device, capacitance group, reverse-blocking tetrode thyristor group and the power module XT2 for providing DC voltage, wherein power module XT2 is UPS electricity
Source can provide the DC voltage of lasting 24V for relay group, and is electrically connected with the pin of relay 5 and pin 6, ensure
Relay group continues normal use.Further, capacitance group includes that two capacitor LB1 in parallel and capacitor LB2 are formed, described
Capacitor LB1 is made of three the capacitance LB1-C1 being connected in triple line, capacitance LB1-C2 and capacitance LB1-C3, described
Capacitor LB2 is made of three the capacitance LB2-C1 being connected in triple line, capacitance LB2-C2 and capacitance LB2-C3, inductance
Device includes three the inductance L4 being connected in triple line, inductance L5 and inductance L6, and further, inductor respectively and is connected in parallel on
Capacitor LB1 and capacitor LB2 in triple line constitute harmonic circuit, can be used in inhibiting the harmonic circuit in triple line and use
In the reactive power for the voltage for compensating frequency converter output, further, reverse-blocking tetrode thyristor group is arranged in capacitance group and alternating voltage
Between the XT5 of source, reverse-blocking tetrode thyristor group includes three reverse-blocking tetrode thyristor S10, the reverse-blocking tetrode thyristors being connected in triple line
S11 and reverse-blocking tetrode thyristor S12, for preventing the late-class circuit of power output end XT3 and 220V AC power TX5 from powering off production suddenly
Raw back-emf causes to impact to the PLC autocompensation installations controlled and frequency converter, wherein reverse-blocking tetrode thyristor is by DSP (at signal
Manage device) control, it can realize that the action for automatically controlling reverse-blocking tetrode thyristor group, PLC controller are also communicated to connect with DSP, PLC controls
Device is controlled by DSP, wherein the capacitance of capacitor LB1 is 12u F, and the capacitance of capacitance LB2 is 30u F.
Further, which is connected by the sub- XT1 in mains electricity input end with inverter output terminal, the alternating current
Input terminal XT1 is the connecting terminal of plug form, which is connected to the motor by power output terminal XT3
It connects, power output terminal XT3 is the connecting terminal of plug traveling, easy to use, wherein the sub- XT1 in mains electricity input end and protection
Connecting valve fuse group F1 in triple line between circuit contactor QR1, including three be connected to opening in triple line
Close fuse, for preventing from short-circuit overcurrent occur in triple line, overvoltage is influenced caused by entire circuit, ensure circuit with
Circuit is normal, prevents accident, wherein protection circuit contactor QR1 is used to control the autocompensation installation and frequency converter
Connection disconnects.
A kind of autocompensation installation based on PLC controls of the present invention uses the power supply of mains electricity input end and output voltage
Leading-out terminal can plug use, easy to use, and entire circuit is protected using switch fuse group, prevent circuit in overvoltage
When entire circuit is impacted, the harmonic circuit formed using inductance group and capacitance group is not only inhibited harmonic current, also had
There is inactive power compensation, the break-make of the system is controlled using protection circuit contactor, relay is capable of providing using ups power
The power supply for continuing 24 hours ensure that relay can continue to work normally.
Further, it is separately connected current transformer in the triple line between alternating-current voltage source TX5 and power output terminal XT3
TA4, current transformer TA5 and current transformer TA6 are convenient electric current in triple line to be measured and played protective loop
Effect.
Example IV
As shown in Figs. 1-3, a kind of compensation method of the autocompensation installation based on PLC controls, steps are as follows：
1) voltage-frequency signal on the power grid of acquisition module acquisition frequency converter output, and the voltage-frequency signal is transmitted
To PLC controller；
2) PLC controller judges whether to need compensation capacitor group；
3) PLC controller control relay group work, relay group control the work of corresponding contactor, and by compensating electric capacity
Device group is electrically connected.
Specific implementation mode, the collecting unit of acquisition module acquire the voltage-frequency signal on the power grid of frequency converter output,
And the voltage-frequency signal is converted into sine squared pulse signal, which passes to A/D converter, should
The sinusoidal impulse signal of acquisition is carried out count operation by A/D converters, and operation result is transmitted to PLC controller, PLC controls
Device judges whether to need compensation capacitor according to operation result, needs compensating electric capacity tolerance, and select a relay or more
A relay (i.e. main compensation circuit or main compensation circuit and multiple secondary compensation circuits) action, makes the coil of contactor be powered,
And access compensation capacitor, when the voltage-frequency signal of frequency converter output restores normal, PLC controller controls relay,
Stop, to the coil blackout of contactor, compensation capacitor being removed.
A kind of compensation method of autocompensation installation based on PLC controls of the present invention is automatically controlled using PLC controller
Compensating capacitance group accesses or cut-out, completes the compensation of additional reactive power, simple operation, it is ensured that power supply system safe operation.
It is a kind of based on PLC control autocompensation installation controller workflow step (when frequency converter output electricity
Voltage-frequency rate be more than 0HZ and less than 100HZ when be normal work)：
S1：Initialization：Main program entrance, the program in PLC controller start to initialize；
S2：Frequency converter is whether normal operation：The internal processes of PLC controller detect frequency converter first after initialization
No normal operation；
S3：0<Real-time frequency<100Hz：PLC controller judges the frequency detected whether in 0Hz to 100Hz, such as in real time
It is then returned in frequency no longer range and continues to detect frequency converter operating status；
S4：Whether capacitance has been compensated for：If real-time frequency meets area requirement, system continues to judge whether capacitance has been mended
It repays, if having been compensated for, returns and continue determination frequency value；
S5：Input compensation capacitance group：As detect capacitance do not compensate also or compensating electric capacity amount deficiency if input compensation electricity
Appearance group.
The spatially relative terms such as "upper", "lower", "left", "right" have been used in embodiment for ease of explanation, have been used for
Relationship of the elements or features relative to another elements or features shown in definition graph.It should be understood that in addition to figure
Shown in except orientation, spatial terminology is intended to include the different direction of device in use or operation.For example, if in figure
Device be squeezed, the element for being stated as being located at other elements or feature "lower" will be located into other elements or feature "upper".
Therefore, exemplary term "lower" can include both upper and lower orientation.Device, which can be positioned in other ways, (to be rotated by 90 ° or position
In other orientation), it can be interpreted accordingly used herein of the opposite explanation in space.
Moreover, the relational terms of such as " first " and " second " or the like are used merely to one with another with identical
The component of title distinguishes, without necessarily requiring or implying between these components there are any this actual relationship or
Sequentially.
Illustrative description has been done to the present invention above, it should explanation, the case where not departing from core of the invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent replacement of creative work equal
Fall into protection scope of the present invention.
Claims (11)
1. a kind of autocompensation installation based on PLC controls, which is characterized in that including：Acquisition module is logical with the acquisition module
Believe the controller of connection, and the execution module controlled by the controller, wherein the controller is PLC controller, described
Execution module include relay group and with the relay group matching connection contactor group and with the contactor group it is corresponding
The compensation capacitor group of setting.
2. a kind of autocompensation installation based on PLC controls according to claim 1, which is characterized in that the acquisition mould
Block includes the A/D converter that collecting unit is connected with series connection with it, and the A/D converter is connected to the controller.
3. a kind of autocompensation installation based on PLC controls according to claim 1, which is characterized in that the relay
Group includes multiple relays, and the multiple relay is connected in parallel on the controller, and the contactor group includes multiple
With the one-to-one contactor of relay.
4. a kind of autocompensation installation based on PLC controls according to claim 1, which is characterized in that the compensation electricity
Container group includes multiple with the one-to-one compensation capacitor of contactor, wherein the compensation capacitor LB3 by three difference simultaneously
Connection is connected to compensating electric capacity LB3-C1, compensating electric capacity LB3-C2 and compensating electric capacity LB3-C3 compositions in triple line.
5. a kind of autocompensation installation based on PLC controls according to claim 1, which is characterized in that further include protection
Circuit contactor QR1, inductor, capacitance group and reverse-blocking tetrode thyristor group.
6. a kind of autocompensation installation based on PLC controls according to claim 5, which is characterized in that the capacitance group
Including the capacitor LB1 being connected in parallel and capacitor LB2, the electricity that the capacitor LB1 is connected to by three in triple line
Hold LB1-C1, capacitance LB1-C2 and capacitance LB1-C3 compositions, the electricity that the capacitor LB2 is connected to by three in triple line
Hold LB2-C1, capacitance LB2-C2 and capacitance LB2-C3 compositions.
7. a kind of autocompensation installation based on PLC controls according to claim 5, which is characterized in that the inductor
Including three the inductance L4 being connected in triple line, inductance L5 and inductance L6, the inductor setting is in protection electricity
Between road contactor QR1 and the capacitance group, the reverse-blocking tetrode thyristor group include three be connected to it is controllable in triple line
Transwitch S10, reverse-blocking tetrode thyristor S11 and reverse-blocking tetrode thyristor S12.
8. a kind of autocompensation installation based on PLC controls according to claim 1, which is characterized in that further include being used for
The power module XT2, the power module XT2 for providing DC voltage are ups power.
9. a kind of autocompensation installation based on PLC controls according to claim 1, which is characterized in that the relay
The six foot relays that the relay of group is connected to by three in triple line form, and the relay is supplied by power module XT2
Electricity, wherein the pin 5 and pin 6 of each six feet relay are connected with power module XT2, the six feet relay
Pin 1 and pin 2 be normally-closed contact, the pin 3 and pin 4 of the six feet relay are normally opened contact, the contactor group
Multiple contactors powered by 220V AC voltage source TX5, wherein the 220V AC voltage source TX5 and the contactor
It is controlled and is connected by the pin 3 and pin 4 of the six feet relay between QR3, the contactor QR3 is eight contact devices.
10. a kind of autocompensation installation based on PLC controls according to claim 4, which is characterized in that the compensation electricity
Container LB3, the contactor QR3 and the relay form main compensation circuit, wherein the two of the compensating electric capacity LB3-C1
The both ends at end, the both ends of the compensating electric capacity LB3-C2 and the compensating electric capacity LB3-C3 are connected in parallel multiple secondary compensation electricity
Road, the contactor and control institute that the pair compensation circuit connect for the compensation capacitor, with the compensation capacitor
The relay for stating contactor corresponds the circuit of composition.
11. a kind of compensation method of the autocompensation installation based on PLC controls, which is characterized in that include the following steps：
1) voltage-frequency signal on the power grid of acquisition module acquisition frequency converter output, and the voltage-frequency signal is transferred to
PLC controller；
2) PLC controller judges whether to need compensation capacitor group；
3) PLC controller control relay group work, relay group control the work of corresponding contactor group, and by compensation capacitor
Group access.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113410848A (en) * | 2021-05-24 | 2021-09-17 | 核工业理化工程研究院 | Touch reactive power compensation device |
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