CN209608346U - A kind of low voltage dynamic reactive-power compensation system - Google Patents
A kind of low voltage dynamic reactive-power compensation system Download PDFInfo
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- CN209608346U CN209608346U CN201920510592.XU CN201920510592U CN209608346U CN 209608346 U CN209608346 U CN 209608346U CN 201920510592 U CN201920510592 U CN 201920510592U CN 209608346 U CN209608346 U CN 209608346U
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- controller
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- low voltage
- power compensation
- reactive
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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
- 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 kind of low voltage dynamic reactive-power compensation systems, the measuring unit including carrying out electric energy detection to three-phase circuit bus；It further include the controller being connect with measuring unit signal, the execution unit being connect with controller signals, several compensating units that reactive compensation is carried out to three-phase circuit, each compensating unit is connect by controllable switch with three-phase circuit bus, the controller is connect with each controllable switch signal respectively by execution unit, to form dynamic auto-reactive compensation circuit, the controller is connect with a central control room upper computer signal, thus allows for remotely controlling.By the utility model can quickly, it is accurate, carry out reactive compensation in real time, reduce operation and maintenance cost, and improve the flexibility and rapidity of integrated scheduling, the rapidity of troubleshooting.
Description
Technical field
The utility model relates to reactive compensation field more particularly to a kind of low voltage dynamic reactive-power compensation systems.
Background technique
In recent years, with the fast development of China's economy and the growth of population, sewage discharge is also increased, therefore dirty
The quantity of water treatment plant and sewage pumping station, scale are continuously improved, and power load is also increasing therewith.According to statistics, motor
Consumed electric energy accounts for 60%~80% in use, and the reactive power of consumption accounts for the specific gravity specific consumption of entire load or burden without work
Electricity also height, therefore very big harmfulness is caused to network system.
Reactive power mainly has the following aspects to the danger of power grid: reactive power increases, and total current can be made to increase, made
The loss of forming apparatus and route increases；Reactive power increases, and causes electric current to increase and increases with apparent energy, directly results in transformation
The capacity of device, conducting wire and other electrical equipments increases.Moreover, the various control equipment that use, measuring instrument instrument
Size and specification will also increase.Influence of the fluctuation of the active power of motor in use to network voltage is smaller, but
The fluctuation of reactive power is easy to cause the fluctuation of voltage, seriously affects grid supply quality sometimes.
Currently, the aggravation of energy crisis and the implementation of energy-saving policy, so that country is not inconsistent the power factor of power grid
The enterprise of standardization increases the dynamics of punishment, thus can seriously damage the productivity effect of enterprise, no matter therefore from economy
Property be still safely operated from the point of view of, reactive compensation is all very necessary, and with the gradually increasing of load in electric system
The continuous variation of long and idle intension, it is idle by being influenced the more complicated of change in system.Therefore, it needs to solve at present
Reactive compensation cannot be quick, accurate, real-time problem and cost the problem of.
Utility model content
The purpose of this utility model is to provide a kind of low voltage dynamic reactive-power compensation system, can quickly, accurately, in real time
Reactive compensation is carried out, operation and maintenance cost are reduced.
To realize the purpose, a kind of low voltage dynamic reactive-power compensation system is provided, including electricity is carried out to three-phase circuit bus
The measuring unit that can be detected；Further include the controller being connect with measuring unit signal, the execution unit being connect with controller signals,
Several compensating units of reactive compensation are carried out to three-phase circuit, each compensating unit is total by controllable switch and three-phase circuit
Line connection, the controller are connect with each controllable switch signal respectively by execution unit, to be formed dynamic automatic idle
Compensation circuit, the controller are connect with a central control room upper computer signal, thus allow for remotely controlling.
Preferably, the central control room upper computer is provided with data center's group morphotype for data to be carried out to networking publication
Block.
Preferably, data center's configuration module is provided with the failure that can be handled the real-time of troubleshooting
Message processing module.
Preferably, the compensating unit is capacitor, and the capacitor is made of three capacitors with triangle connection.
Preferably, the controllable switch is by thyristor groups at the on-off control realized to compensating unit and three-phase circuit bus
System.
Preferably, the controllable switch is attached by a breaker and three-phase circuit bus.
Preferably, the controller is provided with the control cabinet touch screen for execute-in-place control.
Preferably, the controller is connect by Ethernet with central control room upper computer signal.
The utility model compared with prior art, the beneficial effect is that:
Controller is connect with each controllable switch signal respectively by execution unit in the utility model, to be formed dynamic
Auto-reactive compensation circuit, can quickly, it is accurate, carry out reactive compensation in real time, reduce operation and maintenance cost, and improve
The flexibility and rapidity of integrated scheduling, the rapidity of troubleshooting.It can be with by central control room upper computer in the utility model
It is monitored in Central Control Room, therefore scene need not be just monitored, and can be reduced manpower cost on duty.The utility model is by improving total use
The power factor of electricity improves power supply environment, reduces the expense of enterprise's reactive loss and the reactive loss of less power supply, energy saving
Protect environment.The utility model can store data, to the entire monitoring of all dynamic passive compensations in area is pumped to totality
Scheduling, management, analysis of energy consumption etc. is beneficial, and is monitored in real time to state and data, and to needing to deposit
The data of storage are stored, and data transcription personnel are just eliminated, to reduce human cost, and real-time are allowed to be added
By force.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model.
Specific embodiment
Below with reference to embodiment, the utility model will be further described, but does not constitute to any of the utility model
Limitation, the modification of any limited times made in the utility model claims range, still in the claim of the utility model
In range.
As shown in Figure 1, the utility model provides a kind of low voltage dynamic reactive-power compensation system, including to three-phase circuit bus
Carry out the measuring unit 3 of electric energy detection；Further include the controller 2 being connect with 3 signal of measuring unit, connect with 2 signal of controller
Execution unit 4, to three-phase circuit carry out reactive compensation several compensating units 6, each compensating unit 6 pass through controllable switch K1
It is connect with three-phase circuit bus, controller 2 is connect with each controllable switch K1 signal respectively by execution unit 4, to be formed dynamic
The auto-reactive compensation circuit of state, controller 2 are connect with 1 signal of a central control room upper computer, thus allow for remotely controlling.Control
Device 2 processed is provided with the control cabinet touch screen 5 for execute-in-place control.Controller 2 and central control room upper computer 1 by Ethernet into
Row connection.
In the present embodiment, measuring unit 3 uses DTSD341-MB31.5 (6) A three-phase and four-line multifunctional electric energy meter, property
Stable, the feature-rich, strong antijamming capability of energy, and operate convenient, data safety.Simultaneously with two-way RS-485 communication interface,
Convenient for the communication with controller 2.Controller 2 and execution unit 4 using siemens PLC series PLC system, the system with
CPU element includes central processing unit, digital quantity analog input and output terminal and Ethernet in core cell as core
Expansion module CP243-1 etc..Execution unit 4 is made of the input and output and adjunct circuit for belonging to controller 2.
Central control room upper computer 1 is provided with for data to be carried out networking publication so that staff can be by networking eventually
Hold the data center's configuration module analyzed entire data.Data center's configuration module is provided with can be to troubleshooting
The faulted-phase judgment module that real-time is handled.
Compensating unit 6 is capacitor, and capacitor carries out triangle connection.Controllable switch K1 is by thyristor groups at realization pair
The on-off of compensating unit 6 and three-phase circuit bus controls.Controllable switch K1 by a circuit breaker Q F1 and three-phase circuit bus into
Row connection.
In the present embodiment, each compensating unit 6 is sufficiently being examined according to the idle progress dynamic compensation of demand of low-voltage network
It is convenient to consider economy and switching, under the premise of improving capacitor utilization rate to the greatest extent, with greater need for the safety for ensuring capacitor,
It improves the service life, the voltage rating of capacitor should be not less than 1.05 times of the voltage rating of system.It sets in the present embodiment just
Often voltage is 0.38kV when operation, but actual working voltage at capacitor access power grid must be taken into consideration in practical application, also
Consider to influence caused by current-limiting reactor, when selecting capacitor, rated capacity is considered as at least 0.43kv.Its
When middle work, the total capacity of capacitor group are as follows:
C=m × C0
In formula: C is capacitor group total capacity；C0For every condenser capacity；M is every group capacitor number；
Capacitor idle is obtained by calculation to what load issued:
QC=U2/XC
In formula: QCFor the reactive power that capacitor issues, unit kvar；U is busbar voltage；XCFor power capacitor
Capacitive reactance.
In the present embodiment, X-3 BSMJ, BCMJ, BZMJ, ASMJ0.45-that Gionee electric corporation can be selected to produce
Serial Self-healing low-voltage shunt capacitor.Wherein X is condenser capacity, and 6kvar, 12 kvar, 24kvar capacitors may be selected
Device.
In this example it is shown that unit has the form control centre of control cabinet touch screen 5 and central control room upper computer 1
WINCC composition, the performance of the SIMATIC HMI base panel of control cabinet touch screen 5 by optimization, can with controller 2 and
Powerful integration engineering configuration perfection is compatible, it can be ensured that realize simplify exploitation, quick start, accurately monitor and highest level can
The improved efficiency of small automatic system can be arrived with property so that its in work mutually cooperates with and its innovative function
One unprecedented level.WinCC has the following performance feature: it is practical, there is online guide configuration, powerful standard
The features such as interface and real-time data base use
In the workflow of the present embodiment: the collection voltages, electric current, active power, idle from controlled power grid of measuring unit 3
Power, apparent energy and power factor energy parameter and the parameter measured is sent to controller 2 in real time, controller 2 receives
It is compared with target value after real time data and calculates compensation rate, and issues switching signal, execution unit to execution unit 4
4 control the investment and excision number of compensating unit 6 by thyristor, to complete primary adjustment.3 real-time perfoming number of measuring unit
It is sent to controller 2 in real time according to acquisition and by the parameter measured, controller 2 is carried out according to current power factor and target value
Compare, then continues to adjust if it does not meet the requirements, if meeting the requirements, hold mode.Repeatedly, dynamic is completed to compensate.Simultaneously
Central control room upper computer 1 can be automatically brought into operation with setup parameter and hand, and 1 warning note of central control room upper computer runs people if breaking down
Member.
Above are merely preferred embodiments of the utility model, it should be pointed out that for those skilled in the art, In
Under the premise of not departing from the utility model structure, several modifications and improvements can also be made, it is practical new that these all will not influence this
The effect and patent practicability that type is implemented.
Claims (8)
1. a kind of low voltage dynamic reactive-power compensation system, the measuring unit (3) including carrying out electric energy detection to three-phase circuit bus；Its
It is characterized in that: further including the controller (2) being connect with measuring unit (3) signal, the execution unit that is connect with controller (2) signal
(4), several compensating units (6) of reactive compensation are carried out to three-phase circuit, each compensating unit (6) passes through controllable switch
(K1) it is connect with three-phase circuit bus, the controller (2) is connected with each controllable switch (K1) signal respectively by execution unit (4)
It connects, to form dynamic auto-reactive compensation circuit, the controller (2) connect with a central control room upper computer (1) signal, from
And it is able to carry out long-range control.
2. a kind of low voltage dynamic reactive-power compensation system according to claim 1, it is characterised in that: the central control room upper computer
(1) it is provided with data center's configuration module for data to be carried out to networking publication.
3. a kind of low voltage dynamic reactive-power compensation system according to claim 2, it is characterised in that: data center's configuration
Module is provided with can be to the faulted-phase judgment module that the real-time of troubleshooting is handled.
4. a kind of low voltage dynamic reactive-power compensation system according to claim 1, it is characterised in that: the compensating unit (6)
For capacitor, the capacitor is made of three capacitors with triangle connection.
5. a kind of low voltage dynamic reactive-power compensation system according to claim 1 or 4, it is characterised in that: the controllable switch
(K1) by thyristor groups at the on-off control realized to compensating unit (6) and three-phase circuit bus.
6. a kind of low voltage dynamic reactive-power compensation system according to claim 5, it is characterised in that: the controllable switch (K1)
It is attached by a breaker (QF1) with three-phase circuit bus.
7. a kind of low voltage dynamic reactive-power compensation system according to claim 1, it is characterised in that: the controller (2) sets
It is equipped with the control cabinet touch screen (5) for execute-in-place control.
8. a kind of low voltage dynamic reactive-power compensation system according to claim 1, it is characterised in that: the controller (2) is logical
Ethernet is crossed to connect with central control room upper computer (1) signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920510592.XU CN209608346U (en) | 2019-04-12 | 2019-04-12 | A kind of low voltage dynamic reactive-power compensation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920510592.XU CN209608346U (en) | 2019-04-12 | 2019-04-12 | A kind of low voltage dynamic reactive-power compensation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209608346U true CN209608346U (en) | 2019-11-08 |
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ID=68405948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920510592.XU Active CN209608346U (en) | 2019-04-12 | 2019-04-12 | A kind of low voltage dynamic reactive-power compensation system |
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| CN (1) | CN209608346U (en) |
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2019
- 2019-04-12 CN CN201920510592.XU patent/CN209608346U/en active Active
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