CN207459731U - Five level SVG devices - Google Patents
Five level SVG devices Download PDFInfo
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- CN207459731U CN207459731U CN201721446436.9U CN201721446436U CN207459731U CN 207459731 U CN207459731 U CN 207459731U CN 201721446436 U CN201721446436 U CN 201721446436U CN 207459731 U CN207459731 U CN 207459731U
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- control unit
- generation module
- pulse generation
- sampling unit
- electrically connected
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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
- Y02E40/40—Arrangements for reducing harmonics
-
- 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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The utility model is related to Technique of Compensating Capacitance for Reactive fields, more particularly to a kind of five level SVG devices, including filter circuit, control unit, sampling unit, five-electrical level inverter and pulse generation module, one end connection power grid of the filter circuit, the other end connects five-electrical level inverter and sampling unit, the five-electrical level inverter transmission signal is to sampling unit, control unit and pulse generation module, the sampling unit connection load, and the sampling unit transmits feedback signal to control unit, described control unit transmission signal is to pulse generation module, the pulse generation module transmission signal is to five-electrical level inverter.The utility model have many advantages, such as control flexibly, safety and stability, noise is small for operation, fast response time, it is whole to use all-digitized demodulator technology, good operation stability, the utility model is operated mainly under 1200V voltage class, and main compensation harmonic wave, idle and three-phase imbalance, the response time is within 10ms, more existing SVG device, reactive-load compensation effect is good, and cost is lower, capacity higher.
Description
Technical field
The utility model is related to Technique of Compensating Capacitance for Reactive field more particularly to a kind of five level SVG devices.
Background technology
Low pressure SVG is mainly 690V and its following currently on the market, and main topology is three level, this structure institute
Need that IGBT units are less, and cost is relatively low, but using three level, be limited by IGBT technology restrictions, can be used only in 690V and with
Lower voltage class can not then be applied in mesohigh occasion.And be mainly more than 10kV in high pressure field, topological structure is chain type H
Structure is resided abroad, IGBT units are more needed for this structure, and cost is higher, in 1200V occasions and do not apply to.
Utility model content
The technical problem to be solved by the present invention is to provide one kind can the reactive-load compensation in high pressure, production cost it is low five
Level SVG device.
In order to solve the above-mentioned technical problem, technical solution is used by the utility model solves its technical problem：
A kind of five level SVG devices, including filter circuit, control unit, sampling unit, five-electrical level inverter and pulse
Generation module, one end connection power grid of the filter circuit, other end connection five-electrical level inverter and sampling unit, described five
Electrical level inverter transmission signal to sampling unit, control unit and pulse generation module, the sampling unit connection loads, and
The sampling unit transmits feedback signal to control unit, described control unit transmission signal to pulse generation module, the arteries and veins
Generation module transmission signal is rushed to five-electrical level inverter.
Described control unit include voltage controller, limiter, current control electric appliance, the input terminal of the limiter with
2r/3s modules are electrically connected, and output terminal is electrically connected with 3s/2r modules, the output terminal and current control of the 3s/2r modules
Device is electrically connected, and the output terminal of the current controller is electrically connected with the input terminal of 2r/3s modules.
3P4W zero axle controllers, the 3P4W zero axles control are connected between the pulse generation module and control unit
The input terminal of device is electrically connected with control unit, and the input terminal of output terminal and pulse generation module is electrically connected.
Further include a feedback control unit, the output terminal of the feedback control unit input terminal and sampling unit electrically connects
It connects, the input terminal of device output terminal and control unit is electrically connected.
The feedback control unit is phaselocked loop, to gather the level angle of network voltage.
It can be seen from the above technical scheme that the utility model have control flexibly, safety and stability, operation noise it is small,
The advantages that fast response time, entirety are operated mainly in using all-digitized demodulator technology, good operation stability, the utility model
Under 1200V voltage class, main compensation harmonic wave, idle and three-phase imbalance, the response time, more existing SVG was filled within 10ms
It puts, reactive-load compensation effect is good, and cost is lower, capacity higher, substantially increases the reliability of SVG device work, realizes power grid
The continuous accurate compensation of reactive power.
Description of the drawings
Fig. 1 is a kind of five level SVG device circuit diagrams of the utility model.
Fig. 2 is the utility model governor circuit schematic diagram.
Fig. 3 is the circuit diagram of the utility model.
Fig. 4 is the operation schematic diagram of the utility model.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, so that those skilled in the art
The utility model may be better understood and can be practiced, but illustrated embodiment is not as the restriction to the utility model.
Refering to Fig. 1, Fig. 2, Fig. 3, a kind of five level SVG devices, including filter circuit, control unit, sampling unit, five electricity
Flat inverter and pulse generation module, the filter circuit one end connection power grid, the other end connect five-electrical level inverter with
And sampling unit, the five-electrical level inverter transmission signal to sampling unit, control unit and pulse generation module are described to adopt
The connection load of sample unit, and the sampling unit transmits feedback signal to control unit, described control unit transmission signal to arteries and veins
Rush generation module, the pulse generation module transmission signal to five-electrical level inverter.
Described control unit include voltage controller, limiter, current control electric appliance, the input terminal of the limiter with
2r/3s modules are electrically connected, and output terminal is electrically connected with 3s/2r modules, the output terminal and current control of the 3s/2r modules
Device is electrically connected, and the output terminal of the current controller is electrically connected with the input terminal of 2r/3s modules.
By the input, output end of limiter and 2r/3s modules electrically, 3s/2r modules be electrically connected, can effectively limit
The peak current of powered on moment processed prevents the excessive damage circuit components of electric current, ensures the volume operation stability of SVG device.
Described control unit uses double -loop control, and inner ring is transient current ring, ensures the accuracy of output compensation electric current；Outside
Ring is Voltage loop, ensures the stabilization of Active Power Filter-APF DC voltage,
3P4W zero axle controllers, the 3P4W zero axles control are connected between the pulse generation module and control unit
The input terminal of device is electrically connected with control unit, and the input terminal of output terminal and pulse generation module is electrically connected.
Further include a feedback control unit, the output terminal of the feedback control unit input terminal and sampling unit electrically connects
It connects, the input terminal of device output terminal and control unit is electrically connected.
The feedback control unit is phaselocked loop, and to gather the level angle of network voltage, above-mentioned level angle is defeated
Send 2r/3s modules to control unit, 3s/2r modules, in 3s/2r modules.
Phaselocked loop is to be based on converging on network voltage d axis components on three-phase power grid voltage synthetic vector, makes network voltage q
Axis component levels off to 0；In view of actual electric network operating mode is, it is necessary to positive-sequence component in network voltage be separated with negative sequence component, to reach
Lock phase output angle accurately reflects grid voltage fundamental wave positive sequence phase angle.
The sampling unit is responsible for the voltage signal of sampling three-phase power grid, the current signal of threephase load and three-phase SVG
Device output current signal, 2r/3s modules, 3s/2r modules, 3s/2r modules conversion altogether including threephase load current signal,
And the current signal of three-phase SVG device output, nurse one's health electric circuit using load signal, power network signal nurses one's health electric circuit, defeated
After going out the operational amplifier circuit conditioning that signal conditioning circuit carries out respectively, sampled signal conversion is carried out.
Main circuit breaker is used for the switching of control loop, and intelligence device acts on the peak current of major limitation powered on moment, LCL
Wave filter mainly filters out the ripple current of inverter generation；Control unit is counted by sampling load current and device output current
Calculate harmonic current, reactive current and the active unbalanced component of entire power supply branch at present.
SVG DC voltages are maintained by PWM inverter, so have SVG to be not only operated in rectification state but also be operated in inverse
Change state.Its control unit is double -loop control, and inner ring is transient current ring, ensures the accuracy of output compensation electric current；Outer shroud is
Voltage loop ensures the stabilization of Active Power Filter-APF DC voltage.
The effect of pulse generation module be control unit after calculation process, generate processed electric current and voltage letter
Number, three-phase current is changed into pulse signal and is delivered to five-electrical level inverter by pulse generation module,
Control unit uses TMS320F28335 as main control chip, and TMS320F28335 is under the jurisdiction of DelfinoMCU series
Product member, running frequency may be up to 300MHZ, be highly integrated, high-performance solution party for the stringent control application of requirement
Case, harmonic current, the idle electricity of entire power supply branch at present can be calculated by sampling load current and device output current by rising
It flows and active unbalanced component, dsp chip completes sampled signal processing, controls calculating, protection and pwm signal output etc. main
Function.
Refering to Fig. 4, SVG systems include control system and display module.Control module includes system main program, interrupt processing
Program and protection processing routine.System main program includes system register initialization, universal I/O port initializes, peripheral hardware initializes,
Interrupt vector table initialization, the instruction of system mode, startup and the control for stopping logical signal.
Interrupt handling routine is the chief component of control unit, it includes voltage and current sample unit, DC side
Voltage charhing unit, A phase network voltages phase locked-loop unit, instruction current extraction unit, thermal compensation signal output unit are (including voltage
Feedforward compensation, dead area compensation, PWM pulsewidths calculate and control PWM is generated), the detection of switching value and driving unit and intermodule lead to
Believe unit.
Processing routine is protected to include network voltage phase-lacking protective unit, network voltage phase sequence unit, DC voltage
Protection location, system over-current protecting unit, network voltage overvoltage and under-voltage protection unit, the effect for protecting circuit are protection SVG
Failure-free operation, when SVG output circuits capacitance voltage detects that SVG DC capacitor voltages are excessively high or upper and lower capacitance voltage
Difference is excessive, and network voltage is abnormal, and when the temperature is excessively high, protection circuit becomes generates protection signal to power device, cut-out PWM output letters
Number, close SVG.
The utility model have many advantages, such as control flexibly, safety and stability, noise is small for operation, fast response time, whole to use
All-digitized demodulator technology, good operation stability, the utility model are operated mainly under 1200V voltage class, main compensation harmonic wave,
Idle and three-phase imbalance, the response time, more existing SVG device, reactive-load compensation effect was good, and cost is lower within 10ms, held
Higher is measured, the reliability of SVG device work is substantially increased, realizes the continuous accurate compensation of power system reactive power.
Embodiment described above is only the preferred embodiment to absolutely prove the utility model and being lifted, the utility model
Protection domain it is without being limited thereto.The equivalent substitute or change that those skilled in the art are made on the basis of the utility model
It changes, within the scope of protection of the utility model.The scope of protection of the utility model is subject to claims.
Claims (5)
1. a kind of five level SVG devices, which is characterized in that including filter circuit, control unit, sampling unit, five level inverse conversions
Device and pulse generation module, one end connection power grid of the filter circuit, other end connection five-electrical level inverter and sampling
Unit, the five-electrical level inverter transmission signal to sampling unit, control unit and pulse generation module, the sampling unit
Connection load, and the sampling unit transmits feedback signal to control unit, described control unit transmission signal to pulse generates
Module, the pulse generation module transmission signal to five-electrical level inverter.
2. five level SVG device as described in claim 1, which is characterized in that described control unit includes voltage controller, limit
Device processed, current control electric appliance, input terminal and the 2r/3s modules of the limiter are electrically connected, output terminal and 3s/2r modules electricity
Property connection, the output terminals of the 3s/2r modules is electrically connected with current controller, the output terminal and 2r/ of the current controller
The input terminal of 3s modules is electrically connected.
3. five level SVG device as described in claim 1, which is characterized in that the pulse generation module and control unit it
Between be connected with 3P4W zero axle controllers, input terminal and the control unit of the 3P4W zero axles controller are electrically connected, output terminal
It is electrically connected with the input terminal of pulse generation module.
4. five level SVG device as described in claim 1, which is characterized in that further include a feedback control unit, the feedback
The output terminal of control unit input terminal and sampling unit is electrically connected, and the input terminal of device output terminal and control unit is electrically connected.
5. five level SVG device as claimed in claim 4, which is characterized in that the feedback control unit is phaselocked loop, to
Gather the level angle of network voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721446436.9U CN207459731U (en) | 2017-11-02 | 2017-11-02 | Five level SVG devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721446436.9U CN207459731U (en) | 2017-11-02 | 2017-11-02 | Five level SVG devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207459731U true CN207459731U (en) | 2018-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721446436.9U Active CN207459731U (en) | 2017-11-02 | 2017-11-02 | Five level SVG devices |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320414A (en) * | 2018-12-14 | 2019-10-11 | 特变电工西安电气科技有限公司 | It is a kind of applied to the precharge Phase sequence detection of single-phase SVG and guard method and device |
-
2017
- 2017-11-02 CN CN201721446436.9U patent/CN207459731U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320414A (en) * | 2018-12-14 | 2019-10-11 | 特变电工西安电气科技有限公司 | It is a kind of applied to the precharge Phase sequence detection of single-phase SVG and guard method and device |
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