CN208112234U - Advanced Static Var Compensator based on cascade diode H bridge - Google Patents
Advanced Static Var Compensator based on cascade diode H bridge Download PDFInfo
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- CN208112234U CN208112234U CN201820472315.XU CN201820472315U CN208112234U CN 208112234 U CN208112234 U CN 208112234U CN 201820472315 U CN201820472315 U CN 201820472315U CN 208112234 U CN208112234 U CN 208112234U
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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
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Abstract
Advanced Static Var Compensator of the utility model based on cascade diode H bridge controlled rectifier, it is a variety of single-phase and three-phase star connects, corner connection or double star connect main power circuit and several branches in series by inductance and capacitor being in parallel with main power circuit including being made of the cascade of several modular units.It the advantage is that：Advanced Static Var Compensator that the utility model is proposed while there is 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 controlled rectifier circuit that energy one direction is transmitted, the branch constituted is connected in series to the capacitor by inductance with several of controlled rectifier parallel connection, advanced First Harmonic Reactive Power can be both provided, low-order harmonic can be filtered out again, by the input current for controlling controlled 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.
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 controlled rectifier circuit of Advanced Static Var Compensator electricity routing energy one direction transmission is constituted, for
Single-phase and three-phase shunt compensator circuit can use a kind of suitable control strategy, control controlled rectifier input current
To be ahead of or lag behind the phase operation of input supply voltage, by the cooperation with capacitor, provided for system continuously adjustable
Reactive power, while the harmonic wave of power grid is inhibited.In the Advanced Static Var Compensator circuit, energy one direction is passed
Defeated controlled rectifier couples with several capacitors with the branch circuit parallel connection that inductance is connected in series, and the branch that capacitor and inductance are connected in series was both
Advanced First Harmonic Reactive Power can be provided, and low-order harmonic can be filtered out, pass through the controllable whole of control energy one direction transmission
Flow phase of the device input current relative to network voltage, so that it may be reached for system and the mesh of continuously adjustable reactive power is provided
's.It is generated by the controlled rectifier of control energy one direction transmission corresponding humorous with grid current harmonic phase phase difference 180 degree
Wave electric current, so that it may achieve the purpose that suppress or eliminate grid current harmonic.
For the controlled rectifier of energy one direction transmission, up to the present, in the industry primarily as unit power
Factory rectifier uses, when the utility model patent enables its input current to be ahead of or lag behind the phase of input supply voltage
When operation, input current will necessarily generate zero cross distortion, so as to cause electric current THD increase, be proposed in the utility model
It, can be with when controlling input current to be ahead of or lag behind the phase operation of input supply voltage in parallel single-phase compensator
It is controlled by the reasonable injection to input current reference value and reasonably selects switching mode, keep the zero crossing of input current abnormal
Change is effectively suppressed, and can also obtain the changing rule of THD by the analysis to input current parting expression, thus
Input current is advanced out or lags the possibility variation range of the phase of input supply voltage, and finally obtains maximum reactive compensation
Range；And in the parallel three phase compensator that the utility model is proposed, by the three-phase for rationally controlling the transmission of energy one direction
Voltage between the input three phase mains midpoint and rectifier midpoint of controlled rectifier, or by the reasonable of input current given value
Injection control can make current zero-crossing point distortion be effectively suppressed or completely eliminate.The novel static that the utility model is proposed
Only reactive-load compensator had both had SVG rapid dynamic response speed, and harmonic content is few, and device power consumption is low, small in size, light-weight (to be not required to
Want bulky and hulking reactor) etc. series of advantages, it may have SVC control is simple, cheap (because of a small amount of full-control type of only need
Electronic power switch device) the advantages of.
Utility model content
In order to achieve the above objectives, the first novel static reacance based on cascade diode H bridge provided by the utility model
Compensator, including main power circuit, the main power circuit include input inductance, single-phase diode rectifier bridge and N number of first mould
Module unit, wherein N be positive integer, first modular unit include switching device, fast recovery diode, output DC capacitor and
It loads, cascade next first module of the second terminals and institute of the switching device in N number of first modular unit
First terminals of the switching device in unit are sequentially connected, remaining two free ends after the first modular unit cascade,
That is the first terminals of the switching device in first the first modular unit and the direct current positive output end of single-phase diode rectifier bridge
It is connected, the second terminals of the switching device in the first modular unit of n-th and the direct current negative output of single-phase diode rectifier bridge
End is connected, and constitutes the second modular unit, and the second modular unit accesses AC network, the main power electricity after connecting with input inductance
Road further includes by inductance (Lfk) capacitor (Cfk) K filter branches in series, wherein K is positive integer, K filter branch
Road parallel connection accesses AC network.
In order to achieve the above objectives, the second provided by the utility model novel static reacance based on cascade diode H bridge
Compensator, including main power circuit, the main power circuit include input inductance, single-phase diode rectifier bridge and several first
Modular unit, wherein N is positive integer, and first modular unit includes switching device, fast recovery diode, output DC capacitor
And load, cascade next first mould of the second terminals and institute of the switching device in N number of first modular unit
First terminals of the switching device in module unit are sequentially connected, remaining two freedom after the first modular unit cascade
It holds, i.e. the first terminals of the switching device in first the first modular unit and the direct current positive output of single-phase diode rectifier bridge
End is connected, and the second terminals of the switching device in the first modular unit of n-th and the direct current of single-phase diode rectifier bridge are born defeated
Outlet is connected, the second modular unit of composition, and second of each single-phase diode rectifier bridge in M second modular units
First ac input end of ac input end and next single-phase diode rectifier bridge is sequentially connected, the M the second moulds
Remaining two free ends, i.e., the first ac input end and m-th list of first single-phase diode rectifier bridge after module unit cascade
Second ac input end of diode phase rectifier bridge, cascade second modular unit constitute third modular unit, and wherein M is
Positive integer, third modular unit access AC network after connecting with input inductance, and the main power circuit further includes by inductance
(Lfk) capacitor (Cfk) K filter branches in series, wherein K is positive integer, and K filter branches parallel connection access exchanges
Power grid.
In order to achieve the above objectives, the third novel static reacance based on cascade diode H bridge provided by the utility model
Compensator, including three-phase main power circuit, the three-phase main power circuit is including 3 input inductance and by several the first modules
3 third modular units that unit respectively constitutes, 3 input inductance one end are connect with three phase network, the other end respectively with 3
Three modular units series connection after constitute star-like connection, wherein first modular unit include switching device, fast recovery diode,
DC capacitor and load are exported, the second terminals of the switching device in each first modular unit and institute are cascade next
First terminals of the switching device in first modular unit are sequentially connected, remaining after the first modular unit cascade
Two free ends, i.e. the first terminals of the switching device in first the first modular unit are straight with single-phase diode rectifier bridge
It flows positive output end to be connected, the second terminals and the single-phase diode rectifier bridge of the switching device in the first modular unit of n-th
Direct current negative output terminal is connected, and constitutes second modular unit；Each single-phase diode in M second modular units
Second ac input end of rectifier bridge and the first ac input end of next single-phase diode rectifier bridge are sequentially connected, institute
State remaining two free ends after the cascade of the second modular unit, i.e., the first ac input end of first single-phase diode rectifier bridge and
Second ac input end of m-th single-phase diode rectifier bridge cascades second modular unit and constitutes third modular unit,
Middle N, M are positive integer；The three-phase main power circuit further includes K three-phase LC filter, and wherein K is positive integer, each described
Three-phase LC filter is by three inductance (Lfk) capacitor (Cfk) series arm composition, three electricity of each three-phase LC filter
Feel (Lfk) capacitor (Cfk) series arm connect in such a way that star connects with three-phase AC grid.
The third Advanced Static Var Compensator based on cascade diode H bridge of the utility model, wherein 3 inputs
The one end inductance (L101-L103) is connect with three phase network, and the other end replaces structure after connecting respectively with 3 third modular units (C)
At Angle connection.
The third Advanced Static Var Compensator based on cascade diode H bridge of the utility model, wherein the three-phase master
Power circuit replacement includes 3 input inductance, 6 bridge arm inductance, 6 third modular units and DC capacitor, 6 bridge arms
Inductance, 6 third modular units and DC capacitor constitute double star and connect, the common point of same two bridge arm inductance of phase totally three
A, one end that three common points input inductance with 3 respectively is connected, and the other end of 3 input inductance is connected to three phase network.
In order to achieve the above objectives, the 4th kind of novel static reacance based on cascade diode H bridge provided by the utility model
Compensator, including three-phase main power circuit, the three-phase main power circuit is including 3 input inductance and by several the first modules
3 third modular units that unit respectively constitutes, 3 input inductance one end are connect with three phase network, the other end respectively with 3
Three modular units series connection after constitute star-like connection, wherein first modular unit include switching device, fast recovery diode,
DC capacitor and load are exported, the second terminals of the switching device in each first modular unit and institute are cascade next
First terminals of the switching device in first modular unit are sequentially connected, remaining after the first modular unit cascade
Two free ends, i.e. the first terminals of the switching device in first the first modular unit are straight with single-phase diode rectifier bridge
It flows positive output end to be connected, the second terminals and the single-phase diode rectifier bridge of the switching device in the first modular unit of n-th
Direct current negative output terminal is connected, and constitutes second modular unit；Each single-phase diode in M second modular units
Second ac input end of rectifier bridge and the first ac input end of next single-phase diode rectifier bridge are sequentially connected, institute
State remaining two free ends after the cascade of the second modular unit, i.e., the first ac input end of first single-phase diode rectifier bridge and
Second ac input end of m-th single-phase diode rectifier bridge cascades second modular unit and constitutes third modular unit,
Middle N, M are positive integer；The three-phase main power circuit further includes K three-phase LC filter, and wherein K is positive integer, each described
Three-phase LC filter is by three inductance (Lfk) capacitor (Cfk) series arm composition, three electricity of each three-phase LC filter
Feel (Lfk) capacitor (Cfk) series arm connect in a manner of corner connection with three-phase AC grid.
The 4th kind of Advanced Static Var Compensator based on cascade diode H bridge of the utility model, wherein 3 inputs
Inductance one end is connect with three phase network, and replacement constitutes Angle connection after the other end is connected with 3 third modular units respectively.
The 4th kind of Advanced Static Var Compensator based on cascade diode H bridge of the utility model, wherein the three-phase master
Power circuit replacement includes 3 input inductance, 6 bridge arm inductance, 6 third modular units and DC capacitor, 6 bridge arms
Inductance, 6 third modular units and DC capacitor constitute double star and connect, the common point of same two bridge arm inductance of phase totally three
A, one end that three common points input inductance with 3 respectively is connected, and the other end of 3 input inductance is connected to three phase network.
A kind of the advantages of Advanced Static Var Compensator based on cascade diode H bridge of the utility model and good effect exist
In：A kind of novel Static Var Compensator circuit is provided.The Advanced Static Var Compensator circuit is with the transmission of energy one direction
Controlled rectifier circuit based on constitute, in the Advanced Static Var Compensator circuit, energy one direction transmission it is controllable
Rectifier couples with several capacitors with the branch circuit parallel connection that inductance is connected in series, and the branch that capacitor is connected in series with inductance can both provide
Advanced First Harmonic Reactive Power, and low-order harmonic can be filtered out, it is inputted by the controlled rectifier of control energy one direction transmission
The phase of electric current, so that it may be reached for system and the purpose of continuously adjustable reactive power is provided.It is passed by control energy one direction
Defeated controlled rectifier generates and the corresponding harmonic current of grid current harmonic phase phase difference 180 degree, so that it may reach inhibit or
Eliminate the purpose of grid current harmonic.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, the series of advantages such as light-weight, it may have SVC control is simple, price
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 first modular unit in Advanced Static Var Compensator of the utility model based on cascade diode H bridge
Circuit diagram；
Fig. 2 is the electricity of first embodiment in Advanced Static Var Compensator of the utility model based on cascade diode H bridge
Road topology diagram；
Fig. 3 is the second modular unit in Advanced Static Var Compensator of the utility model based on cascade diode H bridge
Circuit diagram；
Fig. 4 is the electricity of second embodiment in Advanced Static Var Compensator of the utility model based on cascade diode H bridge
Road topology diagram；
Fig. 5 is third modular unit in Advanced Static Var Compensator of the utility model based on cascade diode H bridge
Circuit diagram；
Fig. 6 is the electricity of 3rd embodiment in Advanced Static Var Compensator of the utility model based on cascade diode H bridge
Road topological diagram；
Fig. 7 is the electricity of fourth embodiment in Advanced Static Var Compensator of the utility model based on cascade diode H bridge
Road topological diagram；
Fig. 8 is the electricity of the 5th embodiment in Advanced Static Var Compensator of the utility model based on cascade diode H bridge
Road topological diagram；
Fig. 9 is the electricity of sixth embodiment in Advanced Static Var Compensator of the utility model based on cascade diode H bridge
Road topological diagram；
Figure 10 is the electricity of the 7th embodiment in Advanced Static Var Compensator of the utility model based on cascade diode H bridge
Road topological diagram；
Figure 11 is the electricity of the 8th embodiment in Advanced Static Var Compensator of the utility model based on cascade diode H bridge
Road topological diagram；
Specific embodiment
In view of the voltage rating of diode can not be very high, when being used for higher voltage occasion, just there is still a need for adopt
With the cascade mode of diode rectifier bridge.For this purpose, in a kind of novel static reacance based on cascade diode H bridge of the utility model
In the embodiment of compensator, cascade diode H bridge unit power factor rectifier is cascaded by several modular units and is formed
The circuit topology of one entirety.
Fig. 2 referring to Fig.1, the of a kind of Advanced Static Var Compensator based on cascade diode H bridge of the utility model
In one embodiment, main power circuit includes K filter branches, inputs inductance (L), single-phase diode rectifier bridge and N number of first
Modular unit (A), wherein K, N are positive integer.
First modular unit (A) includes switching device, fast recovery diode, output DC capacitor and load.N number of first mould
Second terminals d of the switching device in module unit (A) with switching device in cascade next first modular unit (A)
The first terminals c be sequentially connected, the first modular unit (A) cascade after remaining two free ends, i.e. first the first module
First terminals c of the switching device in unit (A) is connected with the direct current positive output end of single-phase diode rectifier bridge, n-th
Second terminals d of the switching device in one modular unit (A) is connected with the direct current negative output terminal of single-phase diode rectifier bridge, structure
At the second modular unit B, the second modular unit (B) accesses AC network after connecting with input inductance (L).
Each branch routes an inductance (L in K filter branchesfk) and a capacitor (Cfk) in series, K filter
Wave device branch circuit parallel connection accesses AC network.
Referring to Fig.1, Fig. 3, Fig. 4, in a kind of Advanced Static Var Compensator based on cascade diode H bridge of the utility model
Second embodiment in, main power circuit includes input inductance (L), single-phase diode rectifier bridge and several first modular units
(A), wherein N is positive integer.
N number of first modular unit (A) cascade constitutes second modular unit (B).In M the second modular units (B)
Second ac input end b of each single-phase diode rectifier bridge and the first ac input end a of next single-phase diode rectifier bridge
It is sequentially connected, remaining two free ends after the second modular unit (B) cascade, i.e., the first of first single-phase diode rectifier bridge is handed over
Flow the second ac input end b of input terminal a and m-th single-phase diode rectifier bridge, cascade second modular unit (B) constitutes the
Three modular units (C), wherein M is positive integer.Third modular unit (C) accesses AC network after connecting with input inductance (L).
Each branch routes an inductance (L in K filter branchesfk) and a capacitor (Cfk) in series, K filter
Wave device branch circuit parallel connection accesses AC network.
Referring to Fig. 5, Fig. 6, the of a kind of Advanced Static Var Compensator based on cascade diode H bridge of the utility model
In three embodiments, including three-phase main power circuit, three-phase main power circuit include K three-phase LC filter, and wherein K is positive whole
Number, 3 inputs inductance (L101-L103) and the 3 third modular units respectively constituted by several first modular units (A)
(C), 3 input inductance (L101-L103) one end are connect with three phase network, the other end respectively with 3 third modular units (C)
Star-like connection is constituted after series connection.
Wherein, the first modular unit (A) includes switching device, fast recovery diode, output DC capacitor and load.It is N number of
Second terminals d of the switching device in the first modular unit (A) with opening in cascade next first modular unit (A)
The the first terminals c for closing device is sequentially connected, remaining two free ends after the first modular unit (A) cascade, i.e., and first the
First terminals c of the switching device in one modular unit (A) is connected with the direct current positive output end of single-phase diode rectifier bridge, the
The direct current negative output terminal phase of second terminals d of the switching device in N number of first modular unit (A) and single-phase diode rectifier bridge
Even, the second modular unit (B) is constituted.
Second ac input end b of each single-phase diode rectifier bridge in M the second modular units (B) with it is next single-phase
First ac input end a of diode rectifier bridge is sequentially connected, remaining two free ends after the second modular unit (B) cascade, i.e.,
First ac input end a of first single-phase diode rectifier bridge exchanges input with the second of m-th single-phase diode rectifier bridge
B is held, cascade second modular unit (B) constitutes third modular unit (C), and wherein M is positive integer.
Each three-phase LC filter is by three inductance (L in K three-phase LC filterfk) capacitor (Cfk) series arm composition,
Three inductance (L in each three-phase LC filterfk) capacitor (Cfk) series arm in such a way that star connects with three-phase AC grid connect
It connects.
Referring to Fig. 5, Fig. 7, the of a kind of Advanced Static Var Compensator based on cascade diode H bridge of the utility model
In four embodiments, 3 input inductance (L101-L103) one end are connect with three phase network in 3rd embodiment, the other end respectively with
Replacement constitutes Angle connection after 3 third modular unit (C) series connection.
Referring to Fig. 5, Fig. 8, the of a kind of Advanced Static Var Compensator based on cascade diode H bridge of the utility model
In five embodiments, the replacement of three-phase main power circuit includes 3 input inductance L101-L103,6 bridge arm electricity in 3rd embodiment
Feel L104-L109,6 third modular unit C and DC capacitor C10,6 bridge arm inductance (L104-L109), 6 the
Three modular units (C) constitute double star with DC capacitor (C10) and connect, the common point of same two bridge arm inductance of phase totally three,
One end that three common points input inductance (L101-L103) with 3 respectively is connected, and 3 input the another of inductance (L101-L103)
One end is connected to three phase network.
Referring to Fig. 5, Fig. 9, the of a kind of Advanced Static Var Compensator based on cascade diode H bridge of the utility model
In six embodiments, including three-phase main power circuit, three-phase main power circuit include K three-phase LC filter, and wherein K is positive whole
Number, 3 input inductance L101-L103 and the 3 third modular units respectively constituted by several first modular units (A)
(C), 3 input inductance (L101-L103) one end are connect with three phase network, the other end respectively with 3 third modular units (C)
Star-like connection is constituted after series connection.
Wherein, the first modular unit (A) includes switching device, fast recovery diode, output DC capacitor and load.It is N number of
Second terminals d of the switching device in the first modular unit (A) with opening in cascade next first modular unit (A)
The the first terminals c for closing device is sequentially connected, remaining two free ends after the first modular unit (A) cascade, i.e., and first the
First terminals c of the switching device in one modular unit (A) is connected with the direct current positive output end of single-phase diode rectifier bridge, the
The direct current negative output terminal phase of second terminals d of the switching device in N number of first modular unit (A) and single-phase diode rectifier bridge
Even, the second modular unit (B) is constituted.
Second ac input end b of each single-phase diode rectifier bridge in M the second modular units (B) with it is next single-phase
First ac input end a of diode rectifier bridge is sequentially connected, remaining two free ends after the second modular unit (B) cascade, i.e.,
First ac input end a of first single-phase diode rectifier bridge exchanges input with the second of m-th single-phase diode rectifier bridge
B is held, cascade second modular unit (B) constitutes third modular unit (C), and wherein M is positive integer.
Each three-phase LC filter is by three inductance (L in K three-phase LC filterfk) capacitor (Cfk) series arm composition,
Three inductance (L in each three-phase LC filterfk) capacitor (Cfk) series arm in a manner of corner connection with three-phase AC grid connect
It connects.
Referring to Fig. 5, Figure 10, in a kind of Advanced Static Var Compensator based on cascade diode H bridge of the utility model
In 7th embodiment, 3 input inductance (L101-L103) one end are connect with three phase network in sixth embodiment, other end difference
Replacement constitutes Angle connection after connecting with 3 third modular units (C).
Referring to Fig. 5, Figure 11, in a kind of Advanced Static Var Compensator based on cascade diode H bridge of the utility model
In 8th embodiment, the replacement of three-phase main power circuit includes 3 input inductance L101-L103,6 bridge arms in sixth embodiment
Inductance L104-L109,6 third modular unit C and DC capacitor C10,6 bridge arm inductance (L104-L109), 6
Third modular unit (C) and DC capacitor (C10) constitute double star and connect, the common point of same two bridge arm inductance of phase totally three
A, one end that three common points input inductance (L101-L103) with 3 respectively is connected, 3 input inductance (L101-L103)
The other end be connected to three phase network.
A kind of the advantages of Advanced Static Var Compensator based on cascade diode H bridge of the utility model and good effect exist
In：A kind of novel Static Var Compensator circuit is provided.The Advanced Static Var Compensator circuit is with the transmission of energy one direction
Controlled rectifier circuit based on constitute, in the Advanced Static Var Compensator circuit, energy one direction transmission it is controllable
Rectifier couples with several capacitors with the branch circuit parallel connection that inductance is connected in series, and the branch that capacitor is connected in series with inductance can both provide
Advanced First Harmonic Reactive Power, and low-order harmonic can be filtered out, it is inputted by the controlled rectifier of control energy one direction transmission
The phase of electric current, so that it may be reached for system and the purpose of continuously adjustable reactive power is provided.It is passed by control energy one direction
Defeated controlled rectifier generates and the corresponding harmonic current of grid current harmonic phase phase difference 180 degree, so that it may reach inhibit or
Eliminate the purpose of grid current harmonic.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, the series of advantages such as light-weight, it may have SVC control is simple, price
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 (8)
1. based on the Advanced Static Var Compensator of cascade diode H bridge, including main power circuit, main power circuit include input
Inductance (L), single-phase diode rectifier bridge and N number of first modular unit (A), wherein N is positive integer, the first modular unit (A) packet
Switching device, fast recovery diode, output DC capacitor and load are included, the of the switching device in N number of first modular unit (A)
Two terminals (d) with switching device in cascade next first modular unit (A) the first terminals (c) successively phase
Connect, remaining two free ends after the first modular unit (A) cascade, i.e. switching device in first the first modular unit (A)
The first terminals (c) be connected with the direct current positive output end of single-phase diode rectifier bridge, in the first modular unit of n-th (A)
Second terminals (d) of switching device are connected with the direct current negative output terminal of single-phase diode rectifier bridge, constitute the second modular unit
(B), the second modular unit (B) accesses AC network after connecting with input inductance (L), it is characterised in that：Main power circuit also wraps
It includes by inductance (Lfk) capacitor (Cfk) K filter branches in series, wherein K is positive integer, K filter branches parallel connection
Access AC network.
2. based on the Advanced Static Var Compensator of cascade diode H bridge, including main power circuit, main power circuit include input
Inductance (L), single-phase diode rectifier bridge and several first modular units (A), wherein N is positive integer, the first modular unit (A)
Including switching device, fast recovery diode, DC capacitor and load are exported, the switching device in N number of first modular unit (A)
Second terminals (d) with switching device in cascade next first modular unit (A) the first terminals (c) successively phase
Connect, remaining two free ends after the first modular unit (A) cascade, i.e. switching device in first the first modular unit (A)
The first terminals (c) be connected with the direct current positive output end of single-phase diode rectifier bridge, in the first modular unit of n-th (A)
Second terminals (d) of switching device are connected with the direct current negative output terminal of single-phase diode rectifier bridge, constitute the second modular unit
(B)；The second ac input end (b) and next single-phase two of each single-phase diode rectifier bridge in M the second modular units (B)
First ac input end (a) of pole pipe rectifier bridge is sequentially connected, remaining two free ends after the second modular unit (B) cascade, i.e.,
First ac input end (a) of first single-phase diode rectifier bridge exchanges defeated with the second of m-th single-phase diode rectifier bridge
Enter end (b), cascade second modular unit (B) constitutes third modular unit (C), and wherein M is positive integer, third modular unit
(C) AC network is accessed after connecting with input inductance (L), it is characterised in that：Main power circuit further includes by inductance (Lfk) capacitor
(Cfk) K filter branches in series, wherein K is positive integer, K filter branches parallel connection access AC network.
3. based on the Advanced Static Var Compensator of cascade diode H bridge, including three-phase main power circuit, three-phase main power circuit
The 3 third modular units (C) for inputting inductance including 3 and being respectively constituted by several first modular units (A), 3 inputs
The one end inductance (L101-L103) is connect with three phase network, and the other end constitutes star after connecting respectively with 3 third modular units (C)
Shape connection, wherein the first modular unit (A) includes switching device, fast recovery diode, output DC capacitor and load, and each the
Second terminals (d) of the switching device in one modular unit (A) with opening in cascade next first modular unit (A)
The first terminals (c) for closing device are sequentially connected, remaining two free ends after the first modular unit (A) cascade, i.e., and first
First terminals of the switching device in the first modular unit (A) are connected with the direct current positive output end of single-phase diode rectifier bridge,
Second terminals of the switching device in the first modular unit of n-th (A) and the direct current negative output terminal of single-phase diode rectifier bridge
It is connected, constitutes the second modular unit (B)；Second exchange of each single-phase diode rectifier bridge in M the second modular units (B) is defeated
The first ac input end (a) for entering end (b) and next single-phase diode rectifier bridge is sequentially connected, the second modular unit (B) grade
Remaining two free ends, i.e., the first ac input end (a) of first single-phase diode rectifier bridge and single-phase two pole of m-th after connection
Second ac input end (b) of pipe rectifier bridge, cascade second modular unit (B) constitute third modular unit (C), wherein N, M
For positive integer, it is characterised in that：Three-phase main power circuit further includes K three-phase LC filter, and wherein K is positive integer, Mei Gesan
Phase LC filter is by three inductance (Lfk) capacitor (Cfk) series arm composition, three inductance (L of each three-phase LC filterfk)
Capacitor (Cfk) series arm connect in such a way that star connects with three-phase AC grid.
4. the Advanced Static Var Compensator according to claim 3 based on cascade diode H bridge, it is characterised in that：Wherein 3
Input one end inductance (L101-L103) is connect with three phase network, and the other end replaces after connecting respectively with 3 third modular units (C)
Change composition Angle connection.
5. the Advanced Static Var Compensator according to claim 3 based on cascade diode H bridge, it is characterised in that：Wherein three
The replacement of phase main power circuit includes 3 input inductance (L101-L103), 6 bridge arm inductance (L104-L109), 6 third moulds
Module unit (C) and DC capacitor (C10), 6 bridge arm inductance (L104-L109), 6 third modular units (C) and direct current
Hold (C10) and constitute double star connection, the common point of same two bridge arm inductance of phase totally three, three common points are defeated with 3 respectively
The one end for entering inductance (L101-L103) is connected, and the other end of 3 inputs inductance (L101-L103) is connected to three phase network.
6. based on the Advanced Static Var Compensator of cascade diode H bridge, including three-phase main power circuit, three-phase main power circuit
The 3 third modular units (C) for inputting inductance including 3 and being respectively constituted by several first modular units (A), 3 inputs
The one end inductance (L101-L103) is connect with three phase network, and the other end constitutes star after connecting respectively with 3 third modular units (C)
Shape connection, wherein the first modular unit (A) includes switching device, fast recovery diode, output DC capacitor and load, and each the
Second terminals (d) of the switching device in one modular unit (A) with opening in cascade next first modular unit (A)
The first terminals (c) for closing device are sequentially connected, remaining two free ends after the first modular unit (A) cascade, i.e., and first
First terminals of the switching device in the first modular unit (A) are connected with the direct current positive output end of single-phase diode rectifier bridge,
Second terminals of the switching device in the first modular unit of n-th (A) and the direct current negative output terminal of single-phase diode rectifier bridge
It is connected, constitutes the second modular unit (B)；Second exchange of each single-phase diode rectifier bridge in M the second modular units (B) is defeated
The first ac input end (a) for entering end (b) and next single-phase diode rectifier bridge is sequentially connected, the second modular unit (B) grade
Remaining two free ends, i.e., the first ac input end (a) of first single-phase diode rectifier bridge and single-phase two pole of m-th after connection
Second ac input end (b) of pipe rectifier bridge, cascade second modular unit (B) constitute third modular unit (C), wherein N, M
For positive integer, it is characterised in that：Three-phase main power circuit further includes K three-phase LC filter, and wherein K is positive integer, Mei Gesan
Phase LC filter is by three inductance (Lfk) capacitor (Cfk) series arm composition, three inductance (L of each three-phase LC filterfk)
Capacitor (Cfk) series arm connect in a manner of corner connection with three-phase AC grid.
7. the Advanced Static Var Compensator according to claim 6 based on cascade diode H bridge, it is characterised in that：Wherein 3
Input one end inductance (L101-L103) is connect with three phase network, and the other end replaces after connecting respectively with 3 third modular units (C)
Change composition Angle connection.
8. the Advanced Static Var Compensator according to claim 6 based on cascade diode H bridge, it is characterised in that：Wherein three
The replacement of phase main power circuit includes 3 input inductance (L101-L103), 6 bridge arm inductance (L104-L109), 6 third moulds
Module unit (C) and DC capacitor (C10), 6 bridge arm inductance (L104-L109), 6 third modular units (C) and DC capacitor
(C10) double star connection, the common point of same two bridge arm inductance of phase totally three are constituted, three common points are inputted with 3 respectively
One end of inductance (L101-L103) is connected, and the other end of 3 inputs inductance (L101-L103) is connected to three phase network.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306310A (en) * | 2018-01-24 | 2018-07-20 | 中国矿业大学(北京) | Advanced Static Var Compensator based on cascade diode H bridges |
| CN112671253A (en) * | 2021-03-15 | 2021-04-16 | 四川华泰电气股份有限公司 | Cascaded H-bridge converter, open-circuit fault redundancy processing method, medium, and apparatus |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108306310A (en) * | 2018-01-24 | 2018-07-20 | 中国矿业大学(北京) | Advanced Static Var Compensator based on cascade diode H bridges |
| CN112671253A (en) * | 2021-03-15 | 2021-04-16 | 四川华泰电气股份有限公司 | Cascaded H-bridge converter, open-circuit fault redundancy processing method, medium, and apparatus |
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