CN209150729U - A kind of Comprehensive Reactive Power Compensation system based on PLC control - Google Patents
A kind of Comprehensive Reactive Power Compensation system based on PLC control Download PDFInfo
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- CN209150729U CN209150729U CN201920100753.8U CN201920100753U CN209150729U CN 209150729 U CN209150729 U CN 209150729U CN 201920100753 U CN201920100753 U CN 201920100753U CN 209150729 U CN209150729 U CN 209150729U
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- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model discloses a kind of Comprehensive Reactive Power Compensation systems based on PLC control, including PLC controller, high-voltage dynamic reactive compensation device, load A, transformer DB1, transformer DB2, low pressure silicon controlled switching reactive power compensator, load B and load C.The Comprehensive Reactive Power Compensation system controlled based on PLC, the voltage and current signal of power supply system where acquiring each high-voltage dynamic reactive compensation device and low pressure silicon controlled switching reactive power compensator, pass through the operation of PLC internal algorithm, export analog quantity and on-off model, it goes to control the switching of each high-voltage dynamic reactive compensation device and low pressure silicon controlled switching reactive power compensator or the size of compensation rate, realizes optimal compensation effect.
Description
Technical field
The utility model relates to reactive compensation system technical field, specially a kind of idle benefit of synthesis based on PLC control
Repay system.
Background technique
In the reactive compensation application of industrial factories and miness, idle benefit is installed in 6~35kV of high-pressure side or low-voltage distribution system
Device is repaid, has plenty of through the power factor at artificial observation system busbar and carries out manual switching, is had plenty of female by detection
The voltage and current of line calculates the power factor automatic switching at bus, controls relatively independent (isolated), is being installed in this way
Variation that is not prompt enough, quickly responding power factor or do not installing when more set reactive power compensator or reactive compensation
It just cannot effectively be compensated when underfill that the load of device is idle.
Such as there are the following problems:
1. high-pressure side dynamic reactive compensation device (SVC) is when load is smaller, reactive compensation requirement very little, if SVC is filled
Matched filtering compensation device cannot exit in right amount in setting, and the Controlled Reactor device in SVC still exports biggish perceptual nothing
Function offsets the capacitive reactive power of filtering compensation device, causes the loss very big in this way；
2. high voltage bus is furnished with more power transformers, some Circuit Fault on Secondary Transformer are equipped with low-voltage reactive compensator, have
Do not have.When the transformer load equipped with low-voltage reactive compensator is smaller, low-voltage reactive compensator can be cut off automatically；And
Do not have the load of the transformer of low-voltage reactive compensator it is larger when, then need reactive compensation, thus the power of high voltage bus because
Number is lower.
Based on the above issues, a kind of Comprehensive Reactive Power Compensation system based on PLC control is proposed.
Utility model content
The purpose of this utility model is to provide a kind of Comprehensive Reactive Power Compensation systems based on PLC control, have performance steady
Control that is fixed reliable, can synthesizing and coordinating to the high-low pressure dynamic reactive compensation device of dispersion, the efficiently accurate advantage of control, solves
The problems of the prior art.
To achieve the above object, the utility model provides the following technical solutions: a kind of idle benefit of synthesis based on PLC control
Repay system, including PLC controller, high-voltage dynamic reactive compensation device, load A, transformer DB1, transformer DB2, low pressure are controllable
Silicon switching reactive compensator, load B and load C, the high-voltage dynamic reactive compensation device and load A and PLC controller connect
Composition Comprehensive Reactive Power Compensation system A together is met, low pressure silicon controlled switching reactive power compensator, load B and load C and PLC are controlled
Device, which connects, constitutes Comprehensive Reactive Power Compensation system B；
The high-voltage dynamic reactive compensation device includes several FC branches and a TCR branch, several FC branches point
It is not denoted as branch FC1, branch FC2-- branch FCn, several FC branches are composed in series by reactor and capacitor, several FC branch
Road and a TCR branch are controlled by PLC controller, and several FC branches and TCR branch are connected to power supply grid 6 by switch K
On~35kV bus；
The input terminal of the PLC controller connects 1 voltage signal of voltage transformer pt, on power supply grid 6~35kV bus
It is connected to load A, 1 current signal of Current Transmit accesses PLC controller (1)；
Low pressure silicon controlled switching reactive power compensator includes a plurality of thuristor throw-in and throw-off branch TSC, a plurality of thuristor throw-in and throw-off branch
Road TSC be denoted as respectively thuristor throw-in and throw-off branch TSC1, thuristor throw-in and throw-off branch TSC2, -- thuristor throw-in and throw-off branch TSCn, it is a plurality of
Thuristor throw-in and throw-off branch TSC connects on power supply system low-voltage bus bar, and the control terminal of a plurality of thuristor throw-in and throw-off branch connects PLC control
Device processed, loads B and load C connects on power supply system low-voltage bus bar, and load B connects transformer DB1,2 voltage of voltage transformer pt
Signal accesses PLC controller, and load C meets transformer DB2, and 2 current signal of Current Transmit accesses PLC controller.
Preferably, several FC branches are denoted as branch FC1, branch FC2-- branch FCn respectively, several FC branches by
Reactor and capacitor are composed in series.
Preferably, the TCR branch routing Controlled Reactor, thyristor controlled series compensation unit composition, Controlled Reactor, thyristor valve
Group unit is sequentially connected in series.
Preferably, the low pressure silicon controlled switching reactive power compensator is formed by a plurality of thuristor throw-in and throw-off branch circuit parallel connection, often
A pair of of thyristor, capacitor and the reactor of one thuristor throw-in and throw-off branch routing reverse parallel connection are connected in series.
Compared with prior art, the beneficial effects of the utility model are as follows:
Based on the Comprehensive Reactive Power Compensation system that PLC is controlled, PLC controller controls each control switch K and cut-offs, and control is each
The switching control loop of reactive compensation unit, PLC controller calculate the size of active and reactive load, as the small Mr. Yu of active power
When setting value, a FC branch is cut off, and so on；It in this way can be according to the size switching part filtering compensation branch of burden with power
Road reduces the output of Controlled Reactor inductive reactive power, can effectively reduce the loss of the part TCR；PLC controller acquisition is on high-tension side
Voltage and total current signal calculate the power factor of high pressure examination point, according to switching the case where the power factor of high pressure examination point
Low pressure silicon controlled switching reactive power compensator needs reactive compensation load C load is larger, and load B load it is smaller when, investment
Low-voltage reactive compensator meets the requirement of power factor compensation；PLC controller detects that high-pressure side inductive reactive power is greater than or small
When the 1/2 of a compensation branch compensating fundamental wave capacity, the compensation branch is put into or cuts off, and appropriate threshold value is set and avoids switching
Excessively frequently；Entirely through each high-voltage dynamic reactive compensation device of PLC controller and low pressure silicon controlled switching reactive power compensator
The voltage and current signal of place power supply system exports analog quantity and on-off model, goes to control by the operation of PLC internal algorithm
The switching of each high-voltage dynamic reactive compensation device and low pressure silicon controlled switching reactive power compensator or the size of compensation rate are made, is realized
Optimal compensation effect.
Detailed description of the invention
Fig. 1 is the working circuit diagram of the utility model.
In figure: 1, PLC controller；2, high-voltage dynamic reactive compensation device；3, A is loaded；4, transformer DB1；5, transformer
DB2；6, low pressure silicon controlled switching reactive power compensator；7, B is loaded；8, load C.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, a kind of Comprehensive Reactive Power Compensation system based on PLC control, including PLC controller 1, high pressure dynamic nothing
Reactive power compensation installations 2, load A3, transformer DB1-4, transformer DB2-5, low pressure silicon controlled switching reactive power compensator 6, load B7
With load C 8, high-voltage dynamic reactive compensation device 2 and load A3 and PLC controller 1, which connect, constitutes Comprehensive Reactive Power Compensation system
Unite A, and low pressure silicon controlled switching reactive power compensator 6, load B7 and load C 8 and PLC controller 1 connect the comprehensive nothing of composition
Function compensation system B；
High-voltage dynamic reactive compensation device 2 includes several FC branches and a TCR branch, and several FC branches are remembered respectively
For branch FC1, branch FC2-- branch FCn, several FC branches are composed in series by reactor and capacitor, several FC branches and
One TCR branch is controlled by PLC controller 1, several FC branches and TCR branch by switch K be connected to power supply grid 6~
On 35kV bus；
The input terminal of PLC controller 1 connects 1 voltage signal of voltage transformer pt, is connected on power supply grid 6~35kV bus
A3 is loaded, 1 current signal of Current Transmit accesses PLC controller 1；
Low pressure silicon controlled switching reactive power compensator 6 includes a plurality of thuristor throw-in and throw-off branch TSC, a plurality of thuristor throw-in and throw-off branch
Road TSC is denoted as thuristor throw-in and throw-off branch TSC1, thuristor throw-in and throw-off branch TSC2, thuristor throw-in and throw-off branch TSCn, a plurality of crystalline substance respectively
Brake tube switching branch TSC connects on power supply system low-voltage bus bar, and the control terminal of a plurality of thuristor throw-in and throw-off branch accesses PLC control
Device 1 processed, loads B7 and load C 8 connects on power supply system low-voltage bus bar, and load B7 connects transformer DB1-4, voltage transformer
PT2 voltage signal accesses PLC controller 1, and load C 8 meets transformer DB2-5, and 2 current signal of Current Transmit accesses PLC control
Device 1 processed.
Several FC branches are denoted as branch FC1, branch FC2-- branch FCn respectively, and several FC branches are by reactor and capacitor
Device is composed in series.
TCR branch routes Controlled Reactor and thyristor controlled series compensation unit composition, Controlled Reactor and thyristor controlled series compensation unit according to
Secondary series connection.
Low pressure silicon controlled switching reactive power compensator 6 is formed by a plurality of thuristor throw-in and throw-off branch circuit parallel connection, each thyristor
A pair of of thyristor, capacitor and the reactor of switching branch routing reverse parallel connection are connected in series.
The Comprehensive Reactive Power Compensation system based on PLC control, FC branch provide fixed idle output, and TCR branch provides
Adjustable inductive reactive power output；At work, the voltage of power-feed section and total current are introduced respectively by Comprehensive Reactive Power Compensation system A
The analog input of PLC controls each control switch K by PLC controller 1 and cut-offs, controls the switching control of each reactive compensation unit
Circuit processed, on the basis of the power factor put by high pressure examination reaches target value, PLC controller 1 calculates the big of active and reactive load
It is small, when the small Mr. Yu's setting value of active power, a FC branch is cut off, and so on；It in this way can be according to the big of burden with power
Small switching part filtering compensation branch reduces the output of Controlled Reactor inductive reactive power, can effectively reduce the loss of the part TCR；
At work, PLC controller 1 acquires on high-tension side voltage and total current signal to Comprehensive Reactive Power Compensation system B, calculates high pressure examination
The switching of the power factor of point, the control of PLC controller 1 output to each branch of low pressure silicon controlled switching reactive power compensator 6 controls
Circuit, in this way can according to high pressure examine point power factor the case where, switching low-voltage silicon controlled switching reactive power compensator 6,
8 load of load C is larger to need reactive compensation, and load B7 load it is smaller when, put into low pressure silicon controlled switching reactive power compensator
6, meet the requirement of power factor compensation；PLC controller 1 detects that high-pressure side inductive reactive power is more than or less than a compensation branch
Compensating fundamental wave capacity 1/2 when, put into or cut off the compensation branch, and appropriate threshold value is set and avoids switching excessively frequent；It is whole
It is powerful based on PLC, the characteristics of programming is simple, using flexible, the electric quantity signal of power supply system is acquired, simulation algorithm is passed through
It calculates, output control signal coordinates high-low pressure reactive power compensator independent by PLC controller 1, unified
Control, according to the practical operation situation of customer power supply system loading, controls the working condition of each high-low pressure reactive power compensator, reaches
To optimal compensation effect.
In summary: the Comprehensive Reactive Power Compensation system controlled based on PLC, PLC controller 1 control each control switch K
It cut-offs, controls the switching control loop of each reactive compensation unit, PLC controller 1 calculates the size of active and reactive load, when having
When the small Mr. Yu's setting value of function power, a FC branch is cut off, and so on；It in this way can be according to the size switching portion of burden with power
Divide filtering compensation branch, reduces the output of Controlled Reactor inductive reactive power, the loss of the part TCR can be effectively reduced；PLC controller
1 acquires on high-tension side voltage and total current signal, calculates the power factor of high pressure examination point, and the control of PLC controller 1 is exported to low
The switching control loop of each branch of silicon controlled switching reactive power compensator 6 is pressed, the power factor of point can be examined according to high pressure in this way
The case where, switching low-voltage silicon controlled switching reactive power compensator 6 needs reactive compensation 8 load of load C is larger, and loads B7
When load is smaller, low pressure silicon controlled switching reactive power compensator 6 is put into, the requirement of power factor compensation is met；PLC controller 1
When detecting that high-pressure side inductive reactive power is more than or less than the 1/2 of a compensation branch compensating fundamental wave capacity, the benefit is put into or cut off
Branch is repaid, and appropriate threshold value is set and avoids switching excessively frequent；It is filled entirely through each high-voltage dynamic reactive power compensation of PLC controller 1
The voltage and current signal for setting 2 and 6 place power supply system of low pressure silicon controlled switching reactive power compensator, passes through PLC internal algorithm
Operation exports analog quantity and on-off model, goes to control each high-voltage dynamic reactive compensation device 2 and low pressure silicon controlled switching is idle
The switching of compensation device 6 or the size of compensation rate, realize optimal compensation effect.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of Comprehensive Reactive Power Compensation system based on PLC control, including PLC controller (1), high-voltage dynamic reactive compensation device
(2), A (3), transformer DB1 (4), transformer DB2 (5), low pressure silicon controlled switching reactive power compensator (6), load B (7) are loaded
With load C (8), it is characterised in that: the high-voltage dynamic reactive compensation device (2) and load A (3) and PLC controller (1) connection
Together constitute Comprehensive Reactive Power Compensation system A, low pressure silicon controlled switching reactive power compensator (6), load B (7) and load C (8) and
PLC controller (1), which connects, constitutes Comprehensive Reactive Power Compensation system B；
The high-voltage dynamic reactive compensation device (2) includes several FC branches and a TCR branch, several FC branch difference
It is denoted as branch FC1, branch FC2-- branch FCn, several FC branches are composed in series by reactor and capacitor, several FC branches
With TCR branch routing PLC controller (1) control, several FC branches and TCR branch by switch K be connected to power supply grid 6~
On 35kV bus；
The input terminal of the PLC controller (1) connects 1 voltage signal of voltage transformer pt, connects on power supply grid 6~35kV bus
Have load A (3), 1 current signal of Current Transmit accesses PLC controller (1)；
Low pressure silicon controlled switching reactive power compensator (6) includes a plurality of thuristor throw-in and throw-off branch TSC, a plurality of thuristor throw-in and throw-off branch
TSC be denoted as respectively thuristor throw-in and throw-off branch TSC1, thuristor throw-in and throw-off branch TSC2, -- thuristor throw-in and throw-off branch TSCn, a plurality of crystalline substance
Brake tube switching branch TSC connects on power supply system low-voltage bus bar, and the control terminal of a plurality of thuristor throw-in and throw-off branch connects PLC control
Device (1), loads B (7) and load C (8) connects on power supply system low-voltage bus bar, and load B (7) connects transformer DB1 (4) secondary side
Low-voltage bus bar, 2 voltage signal of voltage transformer pt access PLC controller (1), and it is low that load C (8) connects transformer DB2 (5) secondary side
Bus is pressed, 2 current signal of Current Transmit accesses PLC controller (1).
2. a kind of Comprehensive Reactive Power Compensation system based on PLC control according to claim 1, it is characterised in that: if described
Dry FC branch is denoted as branch FC1, branch FC2-- branch FCn respectively, and several FC branches are by reactor and capacitor series connection group
At.
3. a kind of Comprehensive Reactive Power Compensation system based on PLC control according to claim 1, it is characterised in that: the TCR
Branch routes Controlled Reactor and thyristor controlled series compensation unit composition, and Controlled Reactor and thyristor controlled series compensation unit are sequentially connected in series.
4. a kind of Comprehensive Reactive Power Compensation system based on PLC control according to claim 1, it is characterised in that: described low
Pressure silicon controlled switching reactive power compensator (6) is formed by a plurality of thuristor throw-in and throw-off branch circuit parallel connection, each thuristor throw-in and throw-off branch
It is connected in series by a pair of of thyristor, capacitor and the reactor of reverse parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920100753.8U CN209150729U (en) | 2019-01-21 | 2019-01-21 | A kind of Comprehensive Reactive Power Compensation system based on PLC control |
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| CN201920100753.8U CN209150729U (en) | 2019-01-21 | 2019-01-21 | A kind of Comprehensive Reactive Power Compensation system based on PLC control |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355245A (en) * | 2019-12-25 | 2020-06-30 | 南通市海王电气有限公司 | Dual-control dynamic compensation transformer |
| CN115800305A (en) * | 2023-02-02 | 2023-03-14 | 东方博沃（北京）科技有限公司 | Combined type high-voltage reactive power compensation method and system |
-
2019
- 2019-01-21 CN CN201920100753.8U patent/CN209150729U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355245A (en) * | 2019-12-25 | 2020-06-30 | 南通市海王电气有限公司 | Dual-control dynamic compensation transformer |
| CN115800305A (en) * | 2023-02-02 | 2023-03-14 | 东方博沃（北京）科技有限公司 | Combined type high-voltage reactive power compensation method and system |
| CN115800305B (en) * | 2023-02-02 | 2023-04-18 | 东方博沃（北京）科技有限公司 | Combined type high-voltage reactive power compensation method and system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200509 Address after: 210000 No. 18 east the Fuchun River street, Jianye District, Jiangsu, Nanjing Patentee after: HUATIAN NANJING ENGINEERING & TECHNOLOGY CORPORATION, MCC Address before: 210019 No. 18 east the Fuchun River street, Jianye District, Jiangsu, Nanjing Patentee before: MCC HUATIAN NANJING ELECTRICAL ENGINEERING & TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |