CN108539758A - Star chain type STATCOM and control method based on alternate loop of power circuit - Google Patents
Star chain type STATCOM and control method based on alternate loop of power circuit Download PDFInfo
- Publication number
- CN108539758A CN108539758A CN201810471068.6A CN201810471068A CN108539758A CN 108539758 A CN108539758 A CN 108539758A CN 201810471068 A CN201810471068 A CN 201810471068A CN 108539758 A CN108539758 A CN 108539758A
- Authority
- CN
- China
- Prior art keywords
- phase
- chain type
- power
- star
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
- H02J3/1857—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters wherein such bridge converter is a multilevel converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/49—Combination of the output voltage waveforms of a plurality of converters
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a kind of star-like chain type STATCOM and its control method based on alternate loop of power circuit.The system includes three-phase chain type current transformer, three-phase chain type current transformer one end is connected using star-like mode, the other end passes through the ABC three-phases of an inductance connection AC network respectively, LC series resonant circuits, the inductance side of the both ends connection three-phase chain type current transformer of the LC series resonant circuits are set between the adjacent link of three-phase chain type current transformer.The present invention improves star-like chain type STATCOM imbalance reactive power compensation plannings by the way that the high-frequency ac voltage component of the half-bridge converter of three-phase chain link/full-bridge converter output is carried out energy transmission in LC series circuits；Due to adding alternate power channels star chain type STATCOM is alternate, the power density of device is improved.
Description
Technical field
The present invention relates to power electronic technique, and in particular to a kind of star chain type STATCOM based on alternate loop of power circuit
And its control method.
Background technology
Chain type STATCOM is widely used in the power quality controlling field of mesohigh power distribution network, it have modularization,
The characteristics of easily extending, can be directly incorporated into mesohigh power grid without transformer.Traditional chain type STATCOM topologys can be divided into
Hub-and-spoke configuration and triangular structure, under same voltage class, hub-and-spoke configuration can use less unit, to substantially reduce
The complexity of system.
Patent of invention CN201220674796.5 discloses a kind of star chain link formula with out-of-balance current compensation function
STATCOM device, it utilizes Industrial Frequency Transformer offer zero-sequence current circuit to realize alternate energy exchange, arbitrary to reach
Imbalance compensation, but the Industrial Frequency Transformer of the structure is sufficiently bulky, and the power density of device is not utilized to be promoted.
Patent of invention CN201510196420.6 and CN201310101371.4 disclose the side using injected zero-sequence voltage
For method to realize a small amount of alternate energy exchange, but due to the restriction of hardware topology, software approach can only carry out a small amount of injustice
Weighing apparatus reactive-load compensation, uneven reactive power compensation planning are limited.
Invention content
The purpose of the present invention is to provide a kind of star chain type STATCOM and its controlling party based on alternate loop of power circuit
Method, to solve the contradiction between uneven reactive power compensation planning and rating of set density.
Realize that the technical solution of the object of the invention is：A kind of star-like chain type STATCOM based on alternate loop of power circuit,
Including three-phase chain type current transformer, three-phase chain type current transformer one end is connected using star-like mode, and the other end passes through one respectively
LC series resonant circuits, institute is arranged in the ABC three-phases of inductance connection AC network between the adjacent link of three-phase chain type current transformer
State the inductance side of the both ends connection three-phase chain type current transformer of LC series resonant circuits.
The control method of star-like chain type STATCOM based on alternate loop of power circuit, including：
Each phase DC voltage value and each phase power module number are made quotient by step 1, and it is average to obtain each phase DC voltage
ValueDC side total voltage value and all power module numbers of DC side are made into quotient, obtain DC voltage
Average value
Step 2, by voltage instruction mean valueWithIt is poor to make, and carries out PI controls to difference, determines positive sequence active command electricity
Flow valuve
Step 3, acquisition three phase network electric current ia、ib、ic, positive-negative sequence dq decomposition is carried out, determines the positive sequence of three phase network electric current
ComponentAnd negative sequence componentWith
Step 4, acquisition three-phase power grid voltage ea、eb、ec, park transformation is carried out, determines the negative sequence component of three-phase power grid voltage
Positive sequence is active and reactive command current value for step 5, acquisitionWithWithPositive sequence decoupling control is carried out together,
Obtain the positive sequence modulation voltage under rotating coordinate system
Step 6 is incited somebody to actionRespectively withSuperposition carries out anti-park transformation to summed result, determines three-phase main-frequency
Positive sequence modulation voltage
Work(and reactive command current value are born in step 7, acquisitionWithWithNegative phase-sequence decoupling control is carried out together, is obtained
Negative phase-sequence modulation voltage under to rotating coordinate system
It is step 8, rightAnti- park transformation is carried out, determines three-phase main-frequency negative phase-sequence modulation voltage
Step 9 is incited somebody to actionRespectively withIt is poor to make, and to difference difference PI controls, determines phase shifting angle
Step 10, basisWithIt is to frequencyHigh frequency modulated wave carries out phase shift modulation, obtains three-phase high frequency
Modulation voltage uAs、uBs、uCs；
Step 11, by three-phase main-frequency positive sequence modulation voltageRespectively with corresponding power frequency negative phase-sequence modulation voltage And high frequency modulated voltage uAs、uBs、uCsIt is added, obtains final modulation voltage
Step 12, to final modulation voltageCarry out phase-shifting carrier wave modulation, then with each power cell pulse
It exchanges, determines that driving pulse drives each power module.
Compared with prior art, the present invention its remarkable advantage is：1) present invention by by the half-bridge converter of three-phase chain link/
The high-frequency ac voltage component of full-bridge converter output carries out energy transmission in LC series circuits, improves star-like chain type
STATCOM imbalance reactive power compensation plannings；2) present invention adds alternate power channels star chain type STATCOM is alternate, carries
The power density of device is risen.
Description of the drawings
Fig. 1 is that the present invention is based on the topology diagrams of the star chain type STATCOM of alternate loop of power circuit.
Fig. 2 is the topology diagram of half-bridge module.
Fig. 3 is the topology diagram of full-bridge modules.
Fig. 4 is the functional block diagram of imbalance compensation control method of the present invention.
Specific implementation mode
In the following with reference to the drawings and specific embodiments, scheme that the present invention is further explained.
As shown in Figure 1, the star-like chain type STATCOM based on alternate loop of power circuit includes three-phase chain type current transformer, described three
Every phase chain link of phase chain type current transformer includes several concatenated power modules, and one end of three-phase chain link is connected using star-like mode
It connects, the other end is respectively by the ABC three-phases of an inductance connection AC network, between the adjacent link of three-phase chain type current transformer
LC series resonant circuits, the inductance side of the both ends connection three-phase chain type current transformer of the LC series resonant circuits, to hand over are set
High fdrequency component between commutation, to balance alternate unbalanced power.
As a kind of specific implementation mode, half-bridge converter or full-bridge converter may be used in the power modules, such as
Shown in Fig. 2-3, the half-bridge module includes the circuit topology of two power switch tubes and diode reverse parallel connection, the topology string
After connection, then it is in parallel with capacitor.The full-bridge modules include the circuit topology of four power switch tubes and diode reverse parallel connection,
The topology is in parallel then in parallel with capacitor after connecting two-by-two.
As shown in Fig. 2, the half-bridge module includes the first power switch tube, the first power switch tube and capacitance, wherein the
The anode of the collector connection capacitance of one power switch tube, the emitter connection half-bridge module input terminal of the first power switch tube
The collector of anode and the second power switch tube；Second power switch tube emitter connection half-bridge module input terminal cathode and
The cathode of capacitance.As a kind of specific implementation mode, first power switch tube and the second power switch tube are imitated for field of electric force
The semiconductor switch pipe of Ying Guan, power transistor or igbt.
As shown in figure 3, the full-bridge modules include the first power switch tube, the second power switch tube, third power switch
Pipe, the 4th power switch tube and capacitance, wherein the collector of the collector connection third power switch tube of the first power switch tube
With the anode of capacitance, the emitter of the first power switch tube connects the input of the collector and full-bridge modules of the second power switch tube
End；The emitter of second power switch tube connects the cathode of the emitter and capacitance of the 4th power switch tube；Third power switch
The emitter of pipe connects the output end of the collector and full-bridge modules of the 4th power switch tube.As a kind of specific implementation mode,
First power switch tube, the second power switch tube, third power switch tube and the 4th power switch tube are electric power field-effect
The semiconductor switch pipe of pipe, power transistor or igbt.
As a kind of specific implementation mode, the power switch tube is Power MOSFET, power transistor or insulated gate
The semiconductor switch pipe of bipolar transistor.
The control method of star-like chain type STATCOM based on above-mentioned alternate loop of power circuit, control by positive-negative sequence decoupling control and
Power Exchange channel control composition, wherein power frequency pulse signal component ensure that reactive-load compensations of the STATCOM to power grid, high frequency arteries and veins
Rushing signal component makes LC series circuits generate resonance, and alternate power is flowed through in LC series resonant circuits, for alternate power
Equilibrium is as follows：
Each phase DC voltage value and each phase power module number are made quotient by step 1, and it is average to obtain each phase DC voltage
ValueDC side total voltage value and all power module numbers of DC side are made into quotient, obtain DC voltage
Average value
Step 2, by voltage instruction mean valueWithIt is poor to make, and carries out PI controls to difference, determines positive sequence active command electricity
Flow valuve
Step 3, acquisition three phase network electric current ia、ib、ic, positive-negative sequence dq decomposition is carried out, determines the positive sequence of three phase network electric current
ComponentAnd negative sequence componentWith
Step 4, acquisition three-phase power grid voltage ea、eb、ec, park transformation is carried out, determines the negative sequence component of three-phase power grid voltage
Positive sequence is active and reactive command current value for step 5, acquisitionWithWithPositive sequence decoupling control is carried out together,
Obtain the positive sequence modulation voltage under rotating coordinate system
Step 6 is incited somebody to actionRespectively withSuperposition carries out anti-park transformation to summed result, determines three-phase main-frequency
Positive sequence modulation voltage
Work(and reactive command current value are born in step 7, acquisitionWithWithNegative phase-sequence decoupling control is carried out together, is obtained
Negative phase-sequence modulation voltage under to rotating coordinate system
It is step 8, rightAnti- park transformation is carried out, determines three-phase main-frequency negative phase-sequence modulation voltage
Step 9 is incited somebody to actionRespectively withIt is poor to make, and to difference difference PI controls, determines phase shifting angle
Step 10, basisWithIt is to frequencyHigh frequency modulated wave carries out phase shift modulation, obtains three-phase high frequency
Modulation voltage uAs、uBs、uCs；
Step 11, by three-phase main-frequency positive sequence modulation voltageRespectively with corresponding power frequency negative phase-sequence modulation voltage And high frequency modulated voltage uAs、uBs、uCsIt is added, obtains final modulation voltage
Step 12, to final modulation voltageCarry out phase-shifting carrier wave modulation, then with each power cell pulse
It exchanges, determines that driving pulse drives each power module.
Claims (7)
1. a kind of star-like chain type STATCOM based on alternate loop of power circuit, including three-phase chain type current transformer, the three-phase chain type becomes
Stream device one end is connected using star-like mode, and respectively by the ABC three-phases of an inductance connection AC network, feature exists the other end
In setting LC series resonant circuits, the both ends of the LC series resonant circuits between the adjacent link of three-phase chain type current transformer
Connect the inductance side of three-phase chain type current transformer.
2. the star-like chain type STATCOM according to claim 1 based on alternate loop of power circuit, which is characterized in that described every
Phase chain link includes several concatenated power modules.
3. the star-like chain type STATCOM according to claim 2 based on alternate loop of power circuit, which is characterized in that the work(
Rate module is half-bridge module or full-bridge modules.
4. the star-like chain type STATCOM according to claim 3 based on alternate loop of power circuit, which is characterized in that described half
Bridge module includes the circuit topology of two power switch tubes and diode reverse parallel connection, after the topology series connection, then simultaneously with capacitance
Connection.
5. the star-like chain type STATCOM according to claim 3 based on alternate loop of power circuit, which is characterized in that described complete
Bridge module includes the circuit topology of four power switch tubes and diode reverse parallel connection, and the topology is in parallel after connecting two-by-two, then
It is in parallel with capacitance.
6. the star-like chain type STATCOM according to claim 4 or 5 based on alternate loop of power circuit, which is characterized in that described
Power switch tube is the semiconductor switch pipe of Power MOSFET, power transistor or igbt.
7. the control method of the star-like chain type STATCOM based on alternate loop of power circuit, which is characterized in that include the following steps：
Each phase DC voltage value and each phase power module number are made quotient by step 1, obtain each phase DC voltage average valueDC side total voltage value and all power module numbers of DC side are made into quotient, it is flat to obtain DC voltage
Mean value
Step 2, by voltage instruction mean valueWithIt is poor to make, and carries out PI controls to difference, determines positive sequence active command current value
Step 3, acquisition three phase network electric current ia、ib、ic, positive-negative sequence dq decomposition is carried out, determines the positive-sequence component of three phase network electric currentAnd negative sequence componentWith
Step 4, acquisition three-phase power grid voltage ea、eb、ec, park transformation is carried out, determines the negative sequence component of three-phase power grid voltage
Positive sequence is active and reactive command current value for step 5, acquisitionWithWithPositive sequence decoupling control is carried out together, is obtained
Positive sequence modulation voltage under rotating coordinate system
Step 6 is incited somebody to actionRespectively withSuperposition carries out anti-park transformation to summed result, determines three-phase main-frequency positive sequence
Modulation voltage
Work(and reactive command current value are born in step 7, acquisitionWithWithNegative phase-sequence decoupling control is carried out together, is revolved
Turn the negative phase-sequence modulation voltage under coordinate system
It is step 8, rightAnti- park transformation is carried out, determines three-phase main-frequency negative phase-sequence modulation voltage
Step 9 is incited somebody to actionRespectively withIt is poor to make, and to difference difference PI controls, determines phase shifting angle
Step 10, basisWithIt is to frequencyHigh frequency modulated wave carries out phase shift modulation, obtains three-phase high frequency modulated
Voltage uAs、uBs、uCs；
Step 11, by three-phase main-frequency positive sequence modulation voltageRespectively with corresponding power frequency negative phase-sequence modulation voltageAnd high frequency modulated voltage uAs、uBs、uCsIt is added, obtains final modulation voltage
Step 12, to final modulation voltagePhase-shifting carrier wave modulation is carried out, then is exchanged with each power cell pulse,
Determine that driving pulse drives each power module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810471068.6A CN108539758B (en) | 2018-05-15 | 2018-05-15 | Control method of star-shaped chain type STATCOM based on inter-phase power loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810471068.6A CN108539758B (en) | 2018-05-15 | 2018-05-15 | Control method of star-shaped chain type STATCOM based on inter-phase power loop |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108539758A true CN108539758A (en) | 2018-09-14 |
| CN108539758B CN108539758B (en) | 2021-01-26 |
Family
ID=63472026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810471068.6A Active CN108539758B (en) | 2018-05-15 | 2018-05-15 | Control method of star-shaped chain type STATCOM based on inter-phase power loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108539758B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586315A (en) * | 2018-11-26 | 2019-04-05 | 合肥科威尔电源系统有限公司 | Cascade connection type SVG system and power-less compensation control method based on double BUCK modules |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716656A (en) * | 2014-12-31 | 2015-06-17 | 哈尔滨工业大学 | Cascading static synchronous reactive compensator topology with energy exchange unit and control method thereof |
| WO2015188877A1 (en) * | 2014-06-13 | 2015-12-17 | Siemens Aktiengesellschaft | Converter for outputting reactive power, and method for controlling said converter |
| CN105720587A (en) * | 2016-03-21 | 2016-06-29 | 南京航空航天大学 | Inter-phase voltage-sharing control method for DC bus of cascaded star-connected static synchronous compensator (STATCOM) |
| CN206211542U (en) * | 2016-11-25 | 2017-05-31 | 辽宁拓新电力电子有限公司 | Idle compensating control and three-phase imbalance reactive power compensator |
| CN108011379A (en) * | 2018-01-25 | 2018-05-08 | 中国矿业大学(北京) | Advanced Static Var Compensator based on single stage shift module level parallel-type inverter |
-
2018
- 2018-05-15 CN CN201810471068.6A patent/CN108539758B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015188877A1 (en) * | 2014-06-13 | 2015-12-17 | Siemens Aktiengesellschaft | Converter for outputting reactive power, and method for controlling said converter |
| CN104716656A (en) * | 2014-12-31 | 2015-06-17 | 哈尔滨工业大学 | Cascading static synchronous reactive compensator topology with energy exchange unit and control method thereof |
| CN105720587A (en) * | 2016-03-21 | 2016-06-29 | 南京航空航天大学 | Inter-phase voltage-sharing control method for DC bus of cascaded star-connected static synchronous compensator (STATCOM) |
| CN206211542U (en) * | 2016-11-25 | 2017-05-31 | 辽宁拓新电力电子有限公司 | Idle compensating control and three-phase imbalance reactive power compensator |
| CN108011379A (en) * | 2018-01-25 | 2018-05-08 | 中国矿业大学(北京) | Advanced Static Var Compensator based on single stage shift module level parallel-type inverter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586315A (en) * | 2018-11-26 | 2019-04-05 | 合肥科威尔电源系统有限公司 | Cascade connection type SVG system and power-less compensation control method based on double BUCK modules |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108539758B (en) | 2021-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102832841B (en) | Modularized multi-level converter with auxiliary diode | |
| CN109830966B (en) | Three-phase four-wire system electric energy quality comprehensive treatment device and control method and system thereof | |
| CN105071679B (en) | The five level self-balancing inverters based on bridge switch capacitance module | |
| CN106374830A (en) | High-power and high-step-up ratio photovoltaic DC converter device and control method | |
| WO2022022213A1 (en) | Power assembly of three-level inverter, three-level inverter, and wind turbine | |
| CN111682787A (en) | Single-stage three-phase AC/DC converter based on isolation converter module and method | |
| CN112271746B (en) | Electrolytic capacitor-free MMC (modular multilevel converter) topological structure and control strategy for high-frequency chain interconnection | |
| CN113346764B (en) | Medium-voltage converter topological structure based on high-frequency magnetic coupling module | |
| CN108599183B (en) | Auxiliary power unit-based star-shaped chain type STATCOM and control method thereof | |
| CN105305843A (en) | Three-phase series half H-bridge modular multilevel DC converter and control method thereof | |
| CN104578869A (en) | Capacitance self-voltage-sharing three-phase multi-level converter circuit with direct-current bus | |
| CN116633186B (en) | Power electronic transformer power module topological structure | |
| CN108448918B (en) | A kind of single-phase grid-connected photovoltaic DC-to-AC converter of transless | |
| CN107482940B (en) | Modular multilevel converter for high-speed permanent magnet motor driving system | |
| CN102437575B (en) | Medium-and-high-voltage unified power quality controller (UPQC) without transformer | |
| CN110943634A (en) | Energy type router and soft charging control method and system thereof | |
| AU2022444490A1 (en) | Micro inverter | |
| WO2024183693A1 (en) | Positive and negative bipolar modular multilevel ac-ac converter | |
| CN102801381A (en) | Controllable transformer device capable of controlling amplitude and phase angle of voltage individually and control method for same | |
| CN109347335B (en) | Modular multilevel converter bridge arm topology suitable for current source control | |
| CN104333247A (en) | Cascaded multilevel single-phase inverter and cascaded multilevel three-phase inverter adopting novel three-terminal switching networks | |
| CN110022077A (en) | The compound modular multilevel solid-state transformer topological structure of power towards alternating current-direct current mixing power distribution network | |
| CN110336472B (en) | H3IMC topological structure with unbalanced load and boost control method thereof | |
| CN108539758A (en) | Star chain type STATCOM and control method based on alternate loop of power circuit | |
| CN112701944B (en) | Topology structure and control strategy of multi-level converter based on split power unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |