CN105932719B - A kind of tandem type high-voltage large-capacity energy storage virtual synchronous machine system - Google Patents
A kind of tandem type high-voltage large-capacity energy storage virtual synchronous machine system Download PDFInfo
- Publication number
- CN105932719B CN105932719B CN201610166413.6A CN201610166413A CN105932719B CN 105932719 B CN105932719 B CN 105932719B CN 201610166413 A CN201610166413 A CN 201610166413A CN 105932719 B CN105932719 B CN 105932719B
- Authority
- CN
- China
- Prior art keywords
- voltage
- energy storage
- energy
- module
- way
- 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.)
- Active
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 70
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 40
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
-
- 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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of tandem type high-voltage large-capacity energy storage virtual synchronous machine system and its submodules, belong to power electronics field.The present invention is based on virtual synchronous generator (VSG) principles, realize high-voltage large-capacity energy accumulation current converter topological structure, the topology has the ability by step-up transformer access higher level's high-voltage fence, control system has taken into account the good characteristic of virtual synchronous generator techniques simultaneously, good to solve the problems, such as current new-energy grid-connected.Power conversion unit realizes that large capacity high-voltage energy storage virtual synchronous machine technology, modular design are easily achieved low pressure small-power by cascade mode, and facilitates System Expansion upgrading, industrialization assembling configuration and the maintenance of system replacement.
Description
Technical field
The invention belongs to power electronics fields, relate generally to a kind of tandem type high-voltage large-capacity energy storage virtual synchronous machine
System.
Background technique
With the development of society, demand of the mankind to the energy is growing day by day.However, due to grid-connected power generation system and tradition
Power generator has very big difference, and large-scale promotion can also face problems.
Power electronic equipment plays key player in power grid transmission & distribution in recent years, has a wide range of application, and controls quickly spirit
Living, energy conversion efficiency is high.Aiming at the problem that new energy resources system output-power fluctuation, more research at present is filled using energy storage is installed additional
The mode set inhibits output-power fluctuation, and energy accumulation current converter system is obtained due to power swing when solving the problems, such as new energy access
Wide popularization and application.It is new however although energy storage device applies the problem of can solve its output pulsation in new energy
Energy resource system, which lacks the characteristics of inertia still, makes it not make due contribution to maintenance power grid dynamic stability.
Synchronous generator has to the natural friendly advantage of power grid, can be realized automatic frequency in Operation of Electric Systems
It adjusts, automatic voltage is adjusted, idle automatic equalization, the functions such as failure reactive power support.Virtual synchronous generator (Virtual
Synchronous Generator, VSG) technology proposition for solve new-energy grid-connected characteristic issues provide one have grind
Study carefully the solution of value, proposed earliest by European VSYNC project, basic thought is based on Mathematical Models of Synchronous Machine
It realizes the control to distributed generation resource, achievees the purpose that the fundamental characteristics for making it simulate synchronous generator.Specifically, main logical
The characteristics such as ontology model, active frequency modulation and the idle pressure regulation of simulation synchronous generator are crossed, make gird-connected inverter from operating mechanism
With can be comparable with conventional synchronization generator in external characteristics.
If using for reference conventional electric power system operating experience, the operation for making energy accumulation current converter system have similar synchronous generator is special
Property, then it is expected to realize that the friendly of new energy resources system is accessed and improve stability of power system.
Summary of the invention
Object of the present invention is to: in conjunction with the characteristics of energy accumulation current converter and synchronous generator, propose a kind of tandem type high pressure great Rong
Energy storage virtual synchronous machine system is measured, which passes through the high-voltage large-capacity energy accumulation current converter system based on virtual synchronous generator principle
System topological realization.The present invention also provides the system sub-modules of the system simultaneously, which can pass through cascade mode
Realize aforementioned tandem type high-voltage large-capacity energy storage virtual synchronous machine system.
Specifically, the technical solution used in the present invention is: a kind of high-voltage large-capacity energy storage virtual synchronous machine system is sub
Module, including energy-storage units and power conversion unit, energy-storage units are made of more piece energy-storage battery, the power conversion unit packet
Include energy storage unsteady flow interface module, two-way H bridging flow module and control unit, wherein energy storage unsteady flow interface module is for connecting storage
Energy unit and two-way H bridging flow module, one side connect with energy-storage units, the DC side of the other side and two-way H bridging flow module
It is connected；Two-way H bridging flow module is two-way H bridge current transformer, and exchange side is for connecting high-voltage fence；Control unit passes through PWM
The two-way H bridging flow module of drive control comprising VSG Body Control Module, VSG excitation con-trol module and traditional Bidirectional variable-flow
Control module, wherein VSG Body Control Module is used for according to synchronous generator rotary inertia and input mechanical output, electromagnetic power
With the relationship of electromotive force and stator terminal voltage and stator resistance reactance in the relationship and stator of damped coefficient and rotor angular frequency
It is replaced with power grid control variable and establishes corresponding VSG governing equation, VSG excitation con-trol module is used to be sent out according to synchronous
The active frequency droop characteristic and reactive voltage droop characteristic of motor establish corresponding network system state modulator, the two-way change of tradition
Flow control module is for realizing conventional voltage outer ring current inner loop Variable flow control.
Above-mentioned energy storage unsteady flow interface module includes two kinds of specific structures, and one kind is non-isolated precharge structure, another
For isolated DC-DC two-way changing structure.
Non-isolated precharge structure may include LCL filter unit, switching device and the resistance in parallel with switching device,
Switching device and the resistance in parallel with switching device constitute pre-charge circuit, LCL filter unit be used for high order direct current harmonic wave into
Row filtering, two-way H bridging flow module are connected by LCL filter unit with the side of pre-charge circuit, energy-storage units and precharge
The other side of circuit connects.Isolated DC-DC two-way changing structure can add three phase transformations for diode clamp bit-type NPC three-level topology
Depressor structure.
Non-isolated precharge structure due to without direct current conversion links to energy-storage units output DC voltage require compared with
Height, but direct current conversion links are omitted, loss can be reduced and simplify control.And isolated DC-DC two-way changing structure due to
DC voltage can be converted, therefore this structure is relatively small to the requirement of energy-storage units output voltage, and due to it
Containing transformer, the isolation of energy-storage units and two-way H bridging flow module voltage can be realized.
It is empty that the energy storage of tandem type high-voltage large-capacity is set up using above-mentioned high-voltage large-capacity energy storage virtual synchronous machine system sub-modules
The technical solution of quasi- Synchronous Motor System is: virtual including step-up transformer, transmission inductance and multiple above-mentioned high-voltage large-capacity energy storage
Synchronous Motor System submodule, by transmission inductance direct screening high-voltage fence after each system sub-modules cascade, using step-up transformer
Access higher level's high-voltage fence.
Beneficial effects of the present invention are as follows: tandem type high-voltage large-capacity energy storage virtual synchronous machine system of the invention, due to
It is cascaded using multiple system sub-modules, the energy-storage system larger capacity that is content with very little, the design requirement of higher voltage, it is especially suitable
Close high-power applications.And independent four-quadrant power output may be implemented in each system sub-modules, functionally
It ensure that the realization of energy " balance " control of energy storage device in each energy storage chain link, and the chain topology etc. of multi-stage cascade
Effect switching frequency is very high, and harmonic distortion is small.It is designed using modular assembly structure, there is easily extension, can cascade, maintain easily
Application characteristic.Control unit has taken into account the good characteristic of virtual synchronous generator techniques simultaneously, good to solve current new energy
The grid-connected problem in source.
Detailed description of the invention
Fig. 1 is tandem type high-voltage large-capacity energy storage virtual synchronous machine system topology figure of the invention.
Fig. 2 is a kind of topology diagram of isolated DC-DC two-way changing structure.
Fig. 3 is a kind of topology diagram of non-isolated precharge structure.
Fig. 4 is the structure chart of two-way H bridge current transformer.
Fig. 5 is the system block diagram of control unit of the present invention.
Specific embodiment
Below with reference to embodiment and referring to attached drawing, present invention is further described in detail.
Embodiment 1:
Embodiment 1 is a kind of tandem type high-voltage large-capacity energy storage virtual synchronous machine system, and topological structure is as shown in Figure 1.
As shown, the system includes step-up transformer, transmission inductance and multiple system sub-modules, pass through after each system sub-modules cascade
Inductance direct screening high-voltage fence (being 10kV power grid in Fig. 1) is transmitted, using step-up transformer access higher level's high-voltage fence (in Fig. 1
For 35kV power grid).
Cascade submodule is made of four parts: energy-storage units, energy storage unsteady flow interface module, two-way H bridging flow module
And control unit.Energy-storage units have more piece energy-storage battery to compose in series, i.e. energy-storage battery group.Energy storage unsteady flow interface module, two-way H
Bridging flow module and control unit collectively form power conversion unit.
Energy storage unsteady flow interface module is for connecting energy-storage units and two-way H bridging flow module, one side and energy-storage units phase
It connects, the other side is connected with the DC side of two-way H bridging flow module.
The specific structure of energy storage unsteady flow interface module as shown in Fig. 2, it is a kind of isolated DC-DC two-way changing structure,
Three-phase transformer structure is added to realize using diode clamp bit-type (NPC) three-level topology, which is intermediate-frequency transformer.
Compared to single-phase H bridge and single-phase transformer mode, NPC three-level topology structure have switching loss is small, output current harmonics are small,
Work efficiency is high and can obtain the advantage of higher modulation frequency and control method maturation, and avoiding is needed using single-phase transformer
Want the difficulty of larger transmission inductance and capacitance and the more difficult type selecting of big inductance capacitance.When energy-storage battery connection is using isolated
When the energy storage unsteady flow interface module of DC-DC two-way changing structure, due to the energy storage unsteady flow interface module can to DC voltage into
Row transformation, therefore this structure is relatively small to the requirement of energy-storage battery group output voltage, and due to wherein containing intermediate-frequency transformer,
Also it is able to achieve the isolation of energy-storage battery group and two-way H bridging flow module voltage.
The specific structure of two-way H bridging flow module is as shown in figure 4, it is two-way H bridge current transformer, and exchange side is for connecting
High-voltage fence, DC side are connected with energy storage unsteady flow interface module.Due to being become using the energy storage of isolated DC-DC two-way changing structure
Stream interface module and two-way H bridging flow module are Bidirectional variable-flow unit, and energy may be implemented from energy-storage battery group to high-voltage electricity
The propagation and transformation of net, and can realize the energy flow from high-voltage fence to energy-storage battery group.
The system block diagram of control unit is as shown in figure 5, it is one kind in conventional voltage outer ring current inner loop Variable flow control base
The control system for having virtual synchronous machine principle is added on plinth, passes through the two-way H bridging flow module of PWM drive control, including VSG sheet
Body control module, VSG excitation con-trol module and traditional Bidirectional variable-flow control module.
VSG excitation con-trol module is used for active frequency droop characteristic and reactive voltage droop characteristic according to synchronous generator
Corresponding network system state modulator is established, as shown, it is active and idle according to system nominal and power grid calculates instantaneously
The active and active and voltage of idle calculating.VSG Body Control Module is used for mechanical according to synchronous generator rotary inertia and input
Electromotive force and stator terminal voltage and stator electricity in the relationship and stator of power, electromagnetic power and damped coefficient and rotor angular frequency
The relationship of resistance reactance is replaced with power grid control variable and establishes corresponding VSG governing equation, as shown, it combines meter
It calculates active and voltage and power grid detects instantaneous three-phase voltage current and obtains two-phase static coordinate.Traditional Bidirectional variable-flow control module
For realizing conventional voltage outer ring current inner loop Variable flow control, as shown, it combines two-phase static coordinate and power grid to detect
Instantaneous three-phase voltage current obtains PWM driving wave, then is controlled by device drive port two-way H bridging flow module.
It can be seen from the above description that the present embodiment passes through corresponding units block combiner into cascade system sub-modules reality
Existing two-way flow of the energy from energy-storage battery to power grid.It is this to realize that large capacity is high by the way that multiple cascade submodules are connected in series
The design for pressing energy storage virtual synchronous machine makes whole system have easily extension, easy upgrading, can cascade, the application characteristic maintained easily.
The topology has the ability by step-up transformer access 35KV power grid, while control system has taken into account virtual synchronous generator skill
The good characteristic of art, it is good to solve the problems, such as current new-energy grid-connected.
Embodiment 2:
The present embodiment and embodiment 1 are in addition to the specific structure of energy storage unsteady flow interface module, remaining and the basic phase of embodiment 1
Together.
The specific structure is shown in FIG. 3 for the energy storage unsteady flow interface module of the present embodiment, is a kind of non-isolated precharge
Structure, specifically including LCL filter unit, switching device and the resistance in parallel with switching device, (resistance can be resistance string
Form), switching device and the resistance in parallel with switching device constitute pre-charge circuit, and LCL filter unit is used for straight to high order
Stream harmonic wave is filtered, and two-way H bridging flow module is connected by LCL filter unit with the side of pre-charge circuit, energy-storage units
Connect with the other side of pre-charge circuit.It solves the problems, such as the floating ground of high pressure linked network in this way, while having also filtered out DC side high order electricity
Stream/voltage harmonic, it is suppressed that high frequency ripple.Due to requiring energy-storage units output DC voltage without direct current conversion links
It is higher, but direct current conversion links are omitted, loss can be reduced and simplify control, be suitble to require relatively high occasion to loss.
Although the present invention has been described by way of example and in terms of the preferred embodiments, embodiment is not for the purpose of limiting the invention.Not
It is detached from the spirit and scope of the present invention, any equivalent change or retouch done also belongs to the protection scope of the present invention.Cause
This protection scope of the present invention should be based on the content defined in the claims of this application.
Claims (5)
1. a kind of tandem type high-voltage large-capacity energy storage virtual synchronous machine system, it is characterised in that: including step-up transformer, transmission electricity
Sense and multiple system sub-modules, by transmission inductance direct screening high-voltage fence after each system sub-modules cascade, using boosting transformation
Device accesses higher level's high-voltage fence；
The system sub-modules, including energy-storage units and power conversion unit, energy-storage units are made of more piece energy-storage battery, special
Sign is that the power conversion unit includes energy storage unsteady flow interface module, two-way H bridging flow module and control unit, in which:
Energy storage unsteady flow interface module is for connecting energy-storage units and two-way H bridging flow module, and one side connects with energy-storage units, separately
Side is connected with the DC side of two-way H bridging flow module；
Two-way H bridging flow module is two-way H bridge current transformer, and exchange side is for connecting high-voltage fence；
Control unit passes through the two-way H bridging flow module of PWM drive control comprising VSG Body Control Module, VSG excitation con-trol
Module and traditional Bidirectional variable-flow control module, wherein VSG Body Control Module be used for according to synchronous generator rotary inertia with
Input electromotive force and stator terminal voltage in the relationship and stator of mechanical output, electromagnetic power and damped coefficient and rotor angular frequency
It is replaced with the relationship of stator resistance reactance with power grid control variable and establishes corresponding VSG governing equation, had in conjunction with calculating
Function and voltage and power grid detect instantaneous three-phase voltage current and obtain two-phase static coordinate, and VSG excitation con-trol module is used for basis
The active frequency droop characteristic and reactive voltage droop characteristic of synchronous generator establish corresponding network system state modulator, according to
System nominal is active and idle and power grid calculates instantaneous active and the active and voltage of idle calculating, and traditional Bidirectional variable-flow controls mould
Block detects instantaneous three-phase electricity for realizing conventional voltage outer ring current inner loop Variable flow control, in conjunction with two-phase static coordinate and power grid
Current voltage obtains PWM driving wave, then is controlled by device drive port two-way H bridging flow module.
2. tandem type high-voltage large-capacity energy storage virtual synchronous machine system as described in claim 1, it is characterised in that: each system
The energy storage unsteady flow interface module of system submodule is non-isolated precharge structure.
3. tandem type high-voltage large-capacity energy storage virtual synchronous machine system as claimed in claim 2, it is characterised in that: it is described it is non-every
Include LCL filter unit, switching device and the resistance in parallel with switching device from formula precharge structure, switching device and with open
The resistance for closing device parallel connection constitutes pre-charge circuit, and LCL filter unit is for being filtered high order direct current harmonic wave, two-way H bridge
Unsteady flow module is connected by LCL filter unit with the side of pre-charge circuit, the other side phase of energy-storage units and pre-charge circuit
It connects.
4. tandem type high-voltage large-capacity energy storage virtual synchronous machine system as described in claim 1, it is characterised in that: each system
The energy storage unsteady flow interface module of system submodule is isolated DC-DC two-way changing structure.
5. tandem type high-voltage large-capacity energy storage virtual synchronous machine system as claimed in claim 4, it is characterised in that: the isolation
Formula DC-DC two-way changing structure is that diode clamp bit-type NPC three-level topology adds three-phase transformer structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610166413.6A CN105932719B (en) | 2016-03-22 | 2016-03-22 | A kind of tandem type high-voltage large-capacity energy storage virtual synchronous machine system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610166413.6A CN105932719B (en) | 2016-03-22 | 2016-03-22 | A kind of tandem type high-voltage large-capacity energy storage virtual synchronous machine system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105932719A CN105932719A (en) | 2016-09-07 |
| CN105932719B true CN105932719B (en) | 2018-12-11 |
Family
ID=56840434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610166413.6A Active CN105932719B (en) | 2016-03-22 | 2016-03-22 | A kind of tandem type high-voltage large-capacity energy storage virtual synchronous machine system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105932719B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849141B (en) * | 2016-10-28 | 2019-11-05 | 许继集团有限公司 | A kind of large capacity centralization virtual synchronous machine control method, apparatus and system |
| CN107863786B (en) * | 2017-11-22 | 2021-03-26 | 太原理工大学 | Bidirectional power converter control method based on virtual synchronous motor |
| CN108306320A (en) * | 2017-12-11 | 2018-07-20 | 广州智光电气股份有限公司 | A kind of energy accumulation current converter and energy storage converter system |
| CN108258707A (en) * | 2017-12-16 | 2018-07-06 | 西安翌飞核能装备股份有限公司 | A kind of hanging energy storage inverter system of middle straightening with peak-frequency regulation and its control method |
| CN108306321A (en) * | 2017-12-20 | 2018-07-20 | 广州智光电气股份有限公司 | A kind of energy-storage system |
| CN108599216B (en) * | 2018-05-16 | 2020-07-28 | 上海交通大学 | Chain type battery energy storage working method |
| CN113630012A (en) * | 2020-06-15 | 2021-11-09 | 株洲中车时代电气股份有限公司 | Double-active-bridge converter and converter |
| CN112039131B (en) * | 2020-08-07 | 2022-01-25 | 国电南瑞南京控制系统有限公司 | Virtual synchronous machine-based dual-machine parallel system power distribution method and system |
| CN113839577A (en) * | 2021-09-26 | 2021-12-24 | 湘潭大学 | Three-level NPC inverter structure virtual synchronous generator based on fuzzy control |
| CN116470558B (en) * | 2023-05-18 | 2024-02-06 | 中国华能集团清洁能源技术研究院有限公司 | Energy storage system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204597511U (en) * | 2015-03-02 | 2015-08-26 | 沃太能源南通有限公司 | A kind of novel battery pre-charge circuit |
| DE102014009954A1 (en) * | 2014-07-07 | 2016-01-07 | LichtBlick SE | System and method for determining the power of several electric producers and consumers operating in a network as a virtual power plant |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6126499B2 (en) * | 2013-08-30 | 2017-05-10 | 株式会社東芝 | Power conversion apparatus, cooperative control method, and program |
-
2016
- 2016-03-22 CN CN201610166413.6A patent/CN105932719B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014009954A1 (en) * | 2014-07-07 | 2016-01-07 | LichtBlick SE | System and method for determining the power of several electric producers and consumers operating in a network as a virtual power plant |
| CN204597511U (en) * | 2015-03-02 | 2015-08-26 | 沃太能源南通有限公司 | A kind of novel battery pre-charge circuit |
Non-Patent Citations (1)
| Title |
|---|
| 基于虚拟同步发电机的光伏逆变器;郑燕;《中国优秀硕士学位论文全文数据库 工程科技II辑》;20150715(第7期);C042-330 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105932719A (en) | 2016-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105932719B (en) | A kind of tandem type high-voltage large-capacity energy storage virtual synchronous machine system | |
| CN108111045A (en) | External Parallel Time-sharing selecting switch voltage-type single-stage multi input low frequency link inverter | |
| CN101316074B (en) | Back-to-back three-power level midpoint clamping current transformer of wind power generation system | |
| CN102522906B (en) | Voltage balance and power balance control method of cascaded H bridge converter | |
| CN110380626A (en) | The single-phase Cascade H bridge rectifier of high power density, control method and control system | |
| CN102780226B (en) | Direct-current-side voltage control method of cascaded STATCOM based on chopping-control voltage sharing and control circuit | |
| CN104158211B (en) | Based on many power grids system control method of Modular multilevel converter | |
| CN205141697U (en) | Scene integration high -power topological structure of converter system that is incorporated into power networks | |
| CN107645178B (en) | Virtual synchronous machine control system and method based on power electronic transformer | |
| CN106712084A (en) | Wind power generation system for direct current (DC) series connection of offshore wind farm | |
| WO2015143744A1 (en) | Multi-port dc-dc autotransformer and application therefor | |
| Bayhan et al. | Power electronic converters and control techniques in AC microgrids | |
| CN106410932A (en) | Chained battery energy storage converter suitable for medium-voltage DC power distribution network and control method | |
| CN203251228U (en) | Bidirectional energy storage converter | |
| CN107046297B (en) | DC series permanent magnetism wind power plant topological structure and its control method | |
| CN105932720A (en) | High-voltage high-capacity energy storage virtual synchronous machine system | |
| Alotaibi et al. | Three-phase inverter based on isolated SEPIC/CUK converters for large-scale PV applications | |
| CN201528280U (en) | Full power direct-drive type flexible grid-connection current transformer for wind turbine | |
| CN205811562U (en) | A kind of high-voltage large-capacity energy storage virtual synchronous machine system sub-modules and system | |
| CN203278264U (en) | Wind power generator group energy transmission device | |
| CN108111044A (en) | External Parallel Time-sharing selecting switch isolation flyback week wave mode single-stage multi input inverter | |
| CN108448923A (en) | A kind of method for controlling frequency conversion for realizing three-phase inverter Sofe Switch | |
| CN208890652U (en) | A kind of new energy interface system based on double active bridge dcdc converters | |
| CN108364549A (en) | A kind of power converter integrated system for scientific research and teaching | |
| CN108023497A (en) | Series connection while normal shock cycle changing type single-stage multi input annulus inverter in high frequency of powering |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |