CN208638034U - Advanced Static Var Compensator based on VIENNA rectifier - Google Patents
Advanced Static Var Compensator based on VIENNA rectifier Download PDFInfo
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- CN208638034U CN208638034U CN201821215295.4U CN201821215295U CN208638034U CN 208638034 U CN208638034 U CN 208638034U CN 201821215295 U CN201821215295 U CN 201821215295U CN 208638034 U CN208638034 U CN 208638034U
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- vienna rectifier
- inductance
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- var compensator
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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
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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
Abstract
Advanced Static Var Compensator of the utility model based on VIENNA rectifier, including a variety of single-phase and three-phase main power circuit and several filter branch in series by inductance and capacitor being in parallel with main power circuit being made of the cascade of several modular units.The advantage is that: the Advanced Static Var Compensator that is proposed while having SVG rapid dynamic response speed, harmonic content is few, and device power consumption is low, small in size, simple, the cheap advantage of light-weight and SVC control.The Advanced Static Var Compensator circuit is constituted based on the VIENNA rectifier that energy one direction is transmitted, the filter branch constituted is connected in series to the capacitor by inductance with several of cascade VIENNA rectifier parallel connection, advanced First Harmonic Reactive Power can be both provided, low-order harmonic can be filtered out again, pass through the input current of control cascade VIENNA rectifier, it can be embodied as system and continuously adjustable reactive power is provided, and suppress or eliminate grid current harmonic.
Description
Technical field
The utility model relates to the novel structure methods of electric system Static Var Compensator, belong to utility power quality control skill
Dynamic passive compensation control technology field in art.
Background technique
As power electronic equipment is using increasingly extensive and electric system nonlinear load a large amount of accesses, power supply
It shows power quality problem day and protrudes, therefore in recent years, cause by the power quality control technology of core of electronic power convertor
More and more concerns.Mesh is had become for the research of the harmonic suppression apparatus and reactive power compensator applied in electric system
One of most valued research field of preceding electrical engineering field, these utility power quality control devices generally acknowledge that effect is to can be improved
The power factor of power supply system and load reduces place capacity, reduces power loss, stablizes the voltage of receiving end and power grid, mentions
High power supply quality.
According to connection type difference, electric system compensation way can be divided into shunt compensation, series compensation and mix in series and parallel
Three kinds of compensation is closed, wherein shunt compensation obtains most commonly used application due to accessing and cutting off conveniently in the power system.Simultaneously
The most common exemplary device that continuous dynamic compensation can be carried out to the reactive power in electric system in connection compensation application
It is two kinds of devices of Static Var Compensator (SVC) and static reactive generator (SVG).Wherein Static Var Compensator (SVC) is logical
It is often to be fixed capacitor (FC) by thyristor-controlled reactor (TCR) to constitute that (capacitor is usually connected in series with inductance and does simultaneously
Low-frequency harmonics filter use), its advantage is that: Continuous Compensation can be achieved, can split-phase adjust, reliable for operation, control is simple, and price is just
Preferably；Its major defect is itself to generate a large amount of harmonic waves, and necessary additional filterings device in use, in addition reactor is bulky stupid
Weight.Compared with Static Var Compensator (SVC), static reactive generator (SVG) is by full-control type Modern Power Electronic Devices structure
At while realizing continuous dynamic passive compensation, can also having to the harmonic wave of power grid using modern power electronics technology
Effect inhibits, and has dynamic responding speed faster, voltage flicker rejection ability is stronger, and harmonic content is few, and device power consumption is low, volume
Small, series of advantages, the major defect such as light-weight (not needing bulky and hulking reactor) are: expensive, control is complicated.
From the foregoing, tradition can commonly carry out two kinds of canonical parallels of continuous dynamic compensation to the reactive power in electric system
Compensation device respectively has its shortcoming.
Summary of the invention
The purpose of the utility model is to provide a kind of novel static reacances for having above two paralleling compensating device advantage concurrently
Compensator circuit.The Advanced Static Var Compensator circuit is made of VIENNA rectifier circuit, for single-phase and three-phase and
Join compensator circuit, a kind of suitable control strategy can be used, controls controlled rectifier input current to be ahead of or lag
It is run in the phase of input supply voltage, by the cooperation with capacitor, continuously adjustable reactive power is provided for system, simultaneously
The harmonic wave of power grid is inhibited.In the Advanced Static Var Compensator circuit, VIENNA rectifier and several capacitors with
The branch circuit parallel connection connection that inductance is connected in series, the branch that capacitor and inductance are connected in series can both provide advanced First Harmonic Reactive Power,
Low-order harmonic can be filtered out again, the phase by control VIENNA rectifier input current relative to network voltage, so that it may reach
To providing the purpose of continuously adjustable reactive power for system.It is generated and grid current harmonic phase by control VIENNA rectifier
The correspondence harmonic current of phase difference 180 degree, so that it may achieve the purpose that suppress or eliminate grid current harmonic.
For VIENNA rectifier, up to the present, used in the industry primarily as Unity Power Factor PWM Rectifier Based,
When the utility model patent enables its input current to be ahead of or lag behind the operation of the phase of input supply voltage, input current
Zero cross distortion will necessarily be generated, so as to cause electric current THD increase, in the parallel single-phase compensator that the utility model is proposed
In, it, can be by input current when controlling input current to be ahead of or lag behind the phase operation of input supply voltage
The reasonable injection of reference value controls and reasonably selects switching mode, presses down the zero cross distortion of input current effectively
System, can also obtain the changing rule of THD by the analysis to input current parting expression, to show that input current is super
The possibility variation range of preceding or lag input supply voltage phase, and finally obtain the range of maximum reactive compensation；And at this
In the parallel three phase compensator that utility model is proposed, by rationally control the input three phase mains midpoint of VIENNA rectifier with
Voltage between rectifier midpoint, or controlled by the reasonable injection to input current given value, current zero-crossing point can be made to distort
It is effectively suppressed or completely eliminates.The Advanced Static Var Compensator that the utility model is proposed both had had SVG dynamic response
Speed is fast, and harmonic content is few, and device power consumption is low, small in size, and light-weight (not needing bulky and hulking reactor) etc. is a series of excellent
Point, it may have SVC control is simple, the advantages of cheap (because of a small amount of full-control type power electronic switching device of only need).
In order to achieve the above objectives, the first novel static var compensation based on VIENNA rectifier provided by the utility model
Device, including main power circuit are repaid, the main power circuit includes input inductance (L) and P the first modular units (A), and wherein P is
Positive integer, first modular unit (A) include six diode (VD), an electronic power switch device (S), two it is defeated
Capacitor (C out1、C2) and load (R)；The main power circuit includes P cascade first modular units (A), wherein each
First input of second input terminal (b) of a first modular unit (A) and next first modular unit (A)
End (a) is sequentially connected, remaining two input terminals of main power circuit, i.e. and the of first first modular unit (A)
Second input terminal (b) of one input terminal (a) and P first modular units (A) is gone here and there through the input inductance (L)
Couple into AC network, it is characterised in that: the main power circuit further includes by series N number of of inductance (Lf) capacitor (Cf)
Filter branch, wherein N is positive integer, and N number of filter branch parallel connection accesses AC network.
In order to achieve the above objectives, the second provided by the utility model novel static var compensation based on VIENNA rectifier
Device, including three-phase main power circuit are repaid, the three-phase main power circuit includes three input inductance (L101-L103) and the second mould
Module unit (B), second modular unit (B) include 18 diode (VD), three electronic power switch devices (S), two
A output capacitance (C1、C2) and load (R)；Three input terminals (a, b, c) of second modular unit (B) are respectively through described defeated
Enter inductance series connection access three-phase AC grid, it is characterised in that: the three-phase main power circuit further includes M three-phase LC filtering
Device, wherein M is positive integer, and each three-phase LC filter is made of three inductance (Lf) capacitor (Cf) series arms, each
Three inductance (Lf) capacitor (Cf) series arms of the three-phase LC filter are connect in such a way that star connects with three-phase AC grid.
Second of Advanced Static Var Compensator based on VIENNA rectifier of the utility model, wherein each three-phase
Three inductance (Lf) capacitor (Cf) series arms replacement of LC filter is connect in a manner of corner connection with three-phase AC grid.
In order to achieve the above objectives, the third novel static var compensation based on VIENNA rectifier provided by the utility model
Device, including three-phase main power circuit are repaid, the three-phase main power circuit includes six input inductance (L101-L106) and third mould
Module unit (C), the third modular unit (C) is made of three the second modular unit (B) line voltage cascadeds, wherein first
Second input terminal (b) of second modular unit (B) is through the input inductance and second second modular unit (B)
Third input terminal (c) be connected, the third input terminal (c) of first second modular unit (B) is electric through the input
Feel and being connected with first input terminal (a) of third second modular unit (B), second second modular unit (B)
Second input terminal (b) phase of first input terminal (a) through the input inductance and a second modular unit (B) of third
Even；Remaining three input terminals of main power circuit, i.e., first input terminal of first second modular unit (B)
(a), the of second input terminal (b) of second second modular unit (B) and third second modular unit (B)
Three input terminals (c) connect through the input inductance access three-phase AC grid respectively, it is characterised in that: the main function of three-phase
Rate circuit further includes G three-phase LC filter, and wherein G is positive integer, and each three-phase LC filter is by three inductance (Lf)
Capacitor (Cf) series arm is constituted, and three inductance (Lf) capacitor (Cf) series arms of each three-phase LC filter are with star
Mode is connect to connect with three-phase AC grid.
The third Advanced Static Var Compensator based on VIENNA rectifier of the utility model, wherein each three-phase
Three inductance (Lf) capacitor (Cf) series arms replacement of LC filter is connect in a manner of corner connection with three-phase AC grid.
In order to achieve the above objectives, the 4th kind of novel static var compensation based on VIENNA rectifier provided by the utility model
Repay device, including three-phase main power circuit, the three-phase main power circuit includes three input inductance (L101-L103) and three the
Four modular units (D), the 4th modular unit (D) include Z cascade first modular units (A), and wherein Z is positive whole
Number, the of second input terminal (b) of each first modular unit (A) and next first modular unit (A)
One input terminal (a) is sequentially connected, remaining two input terminals of the 4th modular unit (D), i.e. first first module
Second input terminal (b) of first input terminal (a) and Z first modular unit (A) of unit (A)；The input
Inductance one end is connect with three phase network, and the other end constitutes star-like connection after connecting respectively with three the 4th modular units (D),
It is characterized by: the three-phase main power circuit further includes H three-phase LC filter, wherein H is positive integer, each three-phase
LC filter is made of three inductance (Lf) capacitor (Cf) series arms, three inductance (Lf) of each three-phase LC filter
Capacitor (Cf) series arm is connect in such a way that star connects with three-phase AC grid.
The 4th kind of Advanced Static Var Compensator based on VIENNA rectifier of the utility model, wherein each three-phase
Three inductance (Lf) capacitor (Cf) series arms replacement of LC filter is connect in a manner of corner connection with three-phase AC grid.
The 4th kind of Advanced Static Var Compensator based on VIENNA rectifier of the utility model, wherein the input inductance
One end is connect with three phase network, and the other end constitutes angle-style with replacement after three the 4th modular unit (D) series connection respectively and connect.
The 4th kind of Advanced Static Var Compensator based on VIENNA rectifier of the utility model, wherein the input inductance
One end is connect with three phase network, and the other end constitutes angle-style with replacement after three the 4th modular unit (D) series connection respectively and connect；
Three inductance (Lf) capacitor (Cf) series arms of each three-phase LC filter are replaced in a manner of corner connection and three-phase alternating current
Net connection.
The utility model based on VIENNA rectifier Advanced Static Var Compensator the advantages of and have the active effect that and mention
For a kind of novel Static Var Compensator circuit.The Advanced Static Var Compensator circuit is using VIENNA rectifier circuit as base
Plinth is constituted, in the Advanced Static Var Compensator circuit, branch that VIENNA rectifier is connected in series with several capacitors and inductance
The branch that road parallel connection, capacitor and inductance are connected in series can not only provide advanced First Harmonic Reactive Power, but also can filter out low order
Harmonic wave, by the phase for controlling VIENNA rectifier input current, so that it may be reached for system and continuously adjustable idle function is provided
The purpose of rate.By the generation of control VIENNA rectifier and the corresponding harmonic current of grid current harmonic phase phase difference 180 degree, just
It can achieve the purpose for suppressing or eliminating grid current harmonic.The Advanced Static Var Compensator that the utility model is proposed both had
There is SVG rapid dynamic response speed, harmonic content is few, and device power consumption is low, small in size, the series of advantages such as light-weight, it may have SVC
Control is simple, cheap advantage.
It is described in detail below in conjunction with embodiment referring to attached drawing.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model embodiment；
Fig. 2 is the circuit topological structure figure of the first modular unit in the utility model；
Fig. 3 is the first circuit topological structure figure of the utility model；
Fig. 4 is the circuit topological structure figure of the second modular unit in the utility model；
Fig. 5 is second of the three-phase LC filter that band is connect in such a way that star connects with three-phase AC grid in the utility model
Circuit topological structure figure；
Fig. 6 is second of the three-phase LC filter that band is connect in a manner of corner connection with three-phase AC grid in the utility model
Circuit topological structure figure；
Fig. 7 is the circuit topological structure figure of third modular unit in the utility model；
Fig. 8 is the third for the three-phase LC filter that band is connect in such a way that star connects with three-phase AC grid in the utility model
Circuit topological structure figure；
Fig. 9 is the third for the three-phase LC filter that band is connect in a manner of corner connection with three-phase AC grid in the utility model
Circuit topological structure figure；
Figure 10 is the circuit topological structure figure of the 4th modular unit in the utility model；
Figure 11 is the three-phase LC filter that band is connect in such a way that star connects with three-phase AC grid in the utility model by three
A 4th modular unit constitutes the 4th kind of circuit topological structure figure of star-like connection；
Figure 12 is the three-phase LC filter that band is connect in a manner of corner connection with three-phase AC grid in the utility model by three
A 4th modular unit constitutes the 4th kind of circuit topological structure figure of star-like connection；
Figure 13 is the three-phase LC filter that band is connect in such a way that star connects with three-phase AC grid in the utility model by three
A 4th modular unit constitutes the 4th kind of circuit topological structure figure of angle-style connection；
Figure 14 is the three-phase LC filter that band is connect in a manner of corner connection with three-phase AC grid in the utility model by three
A 4th modular unit constitutes the 4th kind of circuit topological structure figure of angle-style connection；
Figure 15 is that the utility model embodiment is in the analogous diagram that electric current is ahead of voltage ratings；
Figure 16 is that the utility model embodiment is in the analogous diagram that electric current lags behind voltage ratings.
Specific embodiment
In embodiment of the utility model based on the Advanced Static Var Compensator of VIENNA rectifier, it is based on VIENNA
The Advanced Static Var Compensator of rectifier is the circuit topology for being cascaded by several modular units and being formed a whole.
Embodiment:
Referring to Fig.1, in the embodiment of the first Advanced Static Var Compensator based on VIENNA rectifier, including main function
Rate circuit, the main power circuit include input inductance (L) and P the first modular units (A), and wherein P is taken as in the present embodiment
Positive integer one, first modular unit (A) include six diode (VD), an electronic power switch device (S), two
Output capacitance (C1、C2) and load (R)；The main power circuit includes first modular unit (A), the main power
Two input terminals of circuit, i.e., first input terminal (a) and second input terminal (b) of described first modular unit (A), warp
Input inductance (L) the series connection access AC network, it is characterised in that: the main power circuit further includes by inductance (Lf) electricity
Hold (Cf) N number of filter branch in series, wherein N is positive integer, and N number of filter branch parallel connection accesses AC network.
Referring to Fig.1 5, based under specific control strategy, VIENNA rectifier is in the work shape that electric current is ahead of voltage
State, current simulations waveform occur Severe distortion, generate a large amount of harmonic waves, seriously affect to power network current generation, will filtering at 0.3 second
Branch circuit parallel connection accesses VIENNA rectifier input side and it is good to observe that the distortion of current simulations waveform obtains by simulation waveform
Improve, alleviates influence of the input side harmonic wave to power network current.
Referring to Fig.1 6, based under specific control strategy, VIENNA rectifier is in the work shape that electric current lags behind voltage
State, current simulations waveform occur Severe distortion, generate a large amount of harmonic waves, seriously affect to power network current generation, will filtering at 0.3 second
Branch circuit parallel connection accesses VIENNA rectifier input side and it is good to observe that the distortion of current simulations waveform obtains by simulation waveform
Improve, alleviates influence of the input side harmonic wave to power network current.
The utility model based on VIENNA rectifier Advanced Static Var Compensator the advantages of and have the active effect that and mention
For a kind of novel Static Var Compensator circuit.The Advanced Static Var Compensator circuit is using VIENNA rectifier circuit as base
Plinth is constituted, in the Advanced Static Var Compensator circuit, branch that VIENNA rectifier is connected in series with several capacitors and inductance
The branch that road parallel connection, capacitor and inductance are connected in series can not only provide advanced First Harmonic Reactive Power, but also can filter out low order
Harmonic wave, by the phase for controlling VIENNA rectifier input current, so that it may be reached for system and continuously adjustable idle function is provided
The purpose of rate.By the generation of control VIENNA rectifier and the corresponding harmonic current of grid current harmonic phase phase difference 180 degree, just
It can achieve the purpose for suppressing or eliminating grid current harmonic.The Advanced Static Var Compensator that the utility model is proposed both had
There is SVG rapid dynamic response speed, harmonic content is few, and device power consumption is low, small in size, the series of advantages such as light-weight, it may have SVC
Control is simple, cheap advantage.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical to this
Novel conception and scope is defined, under the premise of not departing from the utility model design scheme, engineering technology people in this field
The all variations and modifications that member makes the technical solution of the utility model, should all fall into the protection scope of the utility model, this
The claimed technology contents of utility model, are all described in the claims.
Claims (1)
1. the Advanced Static Var Compensator based on VIENNA rectifier, including main power circuit, the main power circuit include
Inductance (L) and P the first modular units (A) are inputted, wherein P is positive integer, and first modular unit (A) includes six two poles
Manage (VD), an electronic power switch device (S), two output capacitance (C1、C2) and load (R)；The main power circuit includes
P cascade first modular units (A), wherein second input terminal (b) of each first modular unit (A) with
First input terminal (a) of next first modular unit (A) is sequentially connected, and remaining two of the main power circuit is defeated
Enter end, i.e., first input terminal (a) and P first modular unit (A) of first first modular unit (A)
Second input terminal (b) connects through the input inductance (L) and accesses AC network, it is characterised in that: the main power circuit is also
Including the N number of filter branch in series by inductance (Lf) capacitor (Cf), wherein N is positive integer, N number of filter branch parallel connection access
AC network.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821215295.4U CN208638034U (en) | 2018-07-28 | 2018-07-28 | Advanced Static Var Compensator based on VIENNA rectifier |
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| CN201821215295.4U CN208638034U (en) | 2018-07-28 | 2018-07-28 | Advanced Static Var Compensator based on VIENNA rectifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711871A (en) * | 2018-07-28 | 2018-10-26 | 中国矿业大学(北京) | Advanced Static Var Compensator based on VIENNA rectifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711871A (en) * | 2018-07-28 | 2018-10-26 | 中国矿业大学(北京) | Advanced Static Var Compensator based on VIENNA rectifier |
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