CN111600332A - 10kV medium-voltage direct-hanging type direct-current micro-grid system - Google Patents
10kV medium-voltage direct-hanging type direct-current micro-grid system Download PDFInfo
- Publication number
- CN111600332A CN111600332A CN202010363601.4A CN202010363601A CN111600332A CN 111600332 A CN111600332 A CN 111600332A CN 202010363601 A CN202010363601 A CN 202010363601A CN 111600332 A CN111600332 A CN 111600332A
- Authority
- CN
- China
- Prior art keywords
- direct
- current
- medium
- hanging type
- 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.)
- Withdrawn
Links
Images
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
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- 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
-
- 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
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a 10kV medium-voltage direct-hanging type direct-current micro-grid system. The system comprises a 10kV direct-current microgrid charging station front stage and an energy storage, photovoltaic, charging pile, direct-current load and wind power generation system, wherein the input end of the 10kV direct-current microgrid charging station front stage is directly connected with a 10kV power grid, the output end of the 10kV direct-current microgrid charging station front stage is a public direct-current bus for the access of the energy storage, photovoltaic, charging pile, direct-current load, wind power generation system and the like, and the energy storage, photovoltaic, charging pile, direct-current load and wind power generation system are connected into a large power grid in a two. The method has the advantages of low harmonic content, high-low voltage fault isolation, easiness in maintenance, bidirectional energy transmission and the like. The invention can construct an intelligent microgrid, is adjustable and controllable, realizes energy routing and ordered charging, and reduces the impact on the power grid.
Description
Technical Field
The invention relates to the field of direct-current microgrid design, in particular to a 10kV medium-voltage direct-hanging direct-current microgrid system.
Background
A10 kV medium-voltage direct-hanging type direct-current micro-grid system is mainly applied to a direct-current micro-grid design scheme. The 10kV medium-voltage direct-hanging type direct-current micro-grid is a novel intelligent direct-current micro-grid which realizes voltage transformation and energy transfer in a power system based on a power electronic transformation technology and an electromagnetic induction principle, and can realize a plurality of functions such as reactive compensation, harmonic wave treatment, power grid interconnection and the like compared with the traditional direct-current micro-grid.
Conventional dc microgrid is generally of the following structure: the industrial frequency transformer converts 10kV alternating current into 380V alternating current, and then converts the 380V alternating current into direct current voltage required by the direct current micro-grid. In order to reduce harmonic interference and reactive power increase of the direct current microgrid to a power grid, harmonic suppression and reactive power compensation equipment is required. Therefore, the defects of large standby and no-load loss, large non-ferrous metal consumption, environmental pollution, no isolation of high and low voltage faults, complex construction, poor electric energy quality, high maintenance cost and the like are brought.
Disclosure of Invention
In order to solve the problems, the invention provides a 10kV medium-voltage direct-hanging type direct-current microgrid system, which provides the following technical scheme: the utility model provides a 10kV middling pressure direct current microgrid system of hanging directly, including 10kV direct current microgrid preceding stage and energy storage, photovoltaic, DC/DC fills electric pile, direct current load, wind power generation system, 10kV direct current microgrid preceding stage input lug connection 10kV electric wire netting, 10kV direct current microgrid preceding stage output is public direct current generating line, supply the access of energy storage, photovoltaic, fill electric pile, direct current load, wind power generation system etc, energy storage, photovoltaic, fill electric pile, direct current load, wind power generation system two-stage transformation access big electric wire netting.
Preferably, the system provides a common low-voltage direct-current bus interface for the access of energy storage, photovoltaic, charging pile, direct-current load, wind power generation system and the like, so that the new energy can be consumed on the spot, and the utilization efficiency of the new energy can be improved.
Preferably, the system does not have a power frequency transformer; the passive device is subverted into an intelligent controllable active device and is used for realizing self-detection, self-diagnosis, self-protection and self-recovery of the whole machine; the 10kV direct-hanging type direct-current micro-grid front stage adopts a cascade H-bridge topology, is used for solving the problem of insufficient voltage resistance of a single power electronic device (IGBT), and can realize functions of reactive compensation, harmonic wave treatment and the like.
Preferably, the relay protection device of the system adopts a two-stage lightning protection design; the power module N-2 is designed in a redundant mode, and a redundant mode is seamlessly switched; monitoring the online insulation of key devices; the double isolation is safer, the state of the whole system is sensed, and the state maintenance is changed from the timing maintenance.
Preferably, the system comprises: the intelligent speed regulation fan system intelligently regulates speed, and the fan wheel patrols the work; the power module unit is in modular design, is installed in a drawer mode, and is inserted and pulled out of a contact finger; safety protection measures, condensation prevention and humidity control; and low-loss standby, the power is partially dormant when in standby, and the standby power consumption is less than 500W.
Compared with the prior art, the invention has the beneficial effects that: and the energy routing topology is adopted, so that the size and the weight of the whole machine are reduced, and the functions of self-detection, self-diagnosis, self-protection, self-recovery and the like of the whole machine are realized. Safe and reliable, and the state perception of the whole system is changed from 'timing maintenance' to 'state maintenance'. High efficiency, greatly reducing the capital recovery time of operators and improving the return on investment. An intelligent microgrid can be built, and the intelligent microgrid is adjustable and controllable, so that energy routing and ordered charging are realized, and the impact on a power grid is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a 10kV medium-voltage direct-hanging direct-current micro-grid topology structure diagram;
fig. 2 is an appearance structure diagram of a 10kV medium-voltage direct-hanging direct-current micro-grid;
fig. 3 is a design diagram of a 10kV medium-voltage direct-hanging direct-current micro-grid scheme.
Detailed Description
Hereinafter, embodiments of the present invention will be further described with reference to the accompanying drawings.
The invention provides a 10kV medium-voltage direct-hanging type direct-current microgrid system which can be used in the field of design of 10kV medium-voltage direct-hanging type direct-current microgrids and has the advantages of low harmonic content, high-low voltage fault isolation, easiness in maintenance, energy bidirectional transmission and the like.
The 10kV medium-voltage direct-hanging direct-current microgrid topology structure chart applied by the invention is shown in fig. 1, the appearance structure chart is shown in fig. 2, the scheme design chart is shown in fig. 3, and the scheme in fig. 3 is as follows:
the utility model provides a 10kV middling pressure direct current microgrid system of hanging directly, including 10kV direct current microgrid preceding stage and energy storage, photovoltaic, DC/DC fills electric pile, direct current load, wind power generation system, 10kV direct current microgrid preceding stage input lug connection 10kV electric wire netting, 10kV direct current microgrid preceding stage output is public direct current generating line, supply the access of energy storage, photovoltaic, fill electric pile, direct current load, wind power generation system etc, energy storage, photovoltaic, fill electric pile, direct current load, wind power generation system two-stage transformation access big electric wire netting.
The system provides a public low-voltage direct-current bus interface for the access of energy storage, photovoltaic, charging piles, direct-current loads, wind power generation systems and the like, new energy is consumed on the spot, and the utilization efficiency of the new energy is improved.
The system has no power frequency transformer; the passive device is subverted into an intelligent controllable active device and is used for realizing self-detection, self-diagnosis, self-protection and self-recovery of the whole machine; the 10kV direct-hanging type direct-current micro-grid front stage adopts a cascade H-bridge topology, is used for solving the problem of insufficient voltage resistance of a single power electronic device (IGBT), and can realize functions of reactive compensation, harmonic wave treatment and the like.
The relay protection device of the system adopts a two-stage lightning protection design; the power module N-2 is designed in a redundant mode, and a redundant mode is seamlessly switched; monitoring the online insulation of key devices; the double isolation is safer, the state of the whole system is sensed, and the state maintenance is changed from the timing maintenance.
The system comprises: the intelligent speed regulation fan system intelligently regulates speed, and the fan wheel patrols the work; the power module unit is in modular design, is installed in a drawer mode, and is inserted and pulled out of a contact finger; safety protection measures, condensation prevention and humidity control; and low-loss standby, the power is partially dormant when in standby, and the standby power consumption is less than 500W.
The system has no power frequency transformer in the aspect of energy routing topology, and the size and the weight of the whole machine are reduced; the passive device is subverted into an intelligent controllable active device, so that the functions of self-detection, self-diagnosis, self-protection, self-recovery and the like of the whole machine are realized; the cascade H-bridge topology is adopted to solve the problem of insufficient voltage resistance of a single power electronic device (IGBT), and the topology is mature and applied to products such as direct-current power transmission and distribution, high-voltage SVG (scalable vector graphics), high-voltage frequency converter and the like.
The safety and reliability are high, the relay protection device is complete and reliable, and the two-stage lightning protection design is adopted; the power module N-2 is designed in a redundant mode, and a redundant mode is seamlessly switched; an AFDD chip is developed autonomously, and key devices are subjected to online insulation monitoring; the double isolation is safer, the state of the whole system is sensed, and the state maintenance is changed from the timing maintenance.
In the aspect of high efficiency, the conversion efficiency of the 10kV direct-hanging charging station can reach more than 95.5 percent, the capital recovery time of operators is greatly shortened, and the investment return rate is improved.
In the aspect of high power density, no power frequency transformer is used, and the volume of the whole machine is reduced; the design of a standardized container occupies less land and is convenient to install; a high-frequency transformer is designed autonomously, so that the power density is improved; the mature heat dissipation air channel design improves the heat dissipation efficiency; the power density is 2-3 times of that of the traditional charging station scheme.
In the aspect of power grid friendliness, 25-level modulation technology can achieve THD less than 2% under half load, which is far lower than the national standard requirement; an intelligent microgrid can be built, and the intelligent microgrid is adjustable and controllable, so that energy routing and ordered charging are realized, and the impact on a power grid is reduced; the low voltage ride through function is realized; the reactive power compensation and harmonic suppression device has the functions of active reactive power compensation and harmonic suppression, and can realize 13-order internal harmonic suppression.
The energy routing is convenient for new energy access. A flexible direct current interface is provided, and access of new energy resources such as photovoltaic, wind power, energy storage and the like is facilitated; the new energy can be consumed on the spot without multi-stage conversion, and the utilization efficiency of the new energy can be improved; an intelligent micro-grid system can be conveniently constructed, energy routing is realized, and the defects of intermittent new energy, poor volatility, poor controllability and the like are overcome; the functions are flexibly configured on specific occasions (such as high-speed service areas and the like), and the utilization rate of the charging station is improved.
The specific embodiments are given above, but the present invention is not limited to the above-described embodiments. The basic idea of the present invention is similar to the above basic scheme, and it is obvious to those skilled in the art that the design of various modified models, formulas and parameters according to the guidance of the present invention does not require creative labor. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
Claims (5)
1. The utility model provides a 10kV middling pressure direct current microgrid system of hanging directly, a serial communication port, including 10kV direct current microgrid preceding stage and energy storage, photovoltaic, fill electric pile, direct current load, wind power generation system, 10kV direct current microgrid preceding stage input lug connection 10kV electric wire netting, 10kV direct current microgrid preceding stage output is public direct current generating line, supply the access of energy storage, photovoltaic, fill electric pile, direct current load, wind power generation system etc. energy storage, photovoltaic, fill electric pile, direct current load, wind power generation system two-stage transformation access big electric wire netting.
2. The 10kV medium-voltage direct-hanging type direct-current microgrid system according to claim 1, characterized in that the 10kV medium-voltage direct-hanging type direct-current microgrid system provides a common low-voltage direct-current bus interface for accessing energy storage, photovoltaics, charging piles, direct-current loads, wind power generation systems and the like, so that new energy is consumed on site, and the utilization efficiency of the new energy is improved.
3. The 10kV medium-voltage direct-hanging type direct-current microgrid system according to claim 1, characterized in that the 10kV medium-voltage direct-hanging type direct-current microgrid system is free of a power frequency transformer; the passive device is subverted into an intelligent controllable active device and is used for realizing self-detection, self-diagnosis, self-protection and self-recovery of the whole machine; the 10kV direct-hanging type direct-current micro-grid front stage adopts a cascade H-bridge topology, is used for solving the problem of insufficient voltage resistance of a single power electronic device (IGBT), and can realize functions of reactive compensation, harmonic wave treatment and the like.
4. The 10kV medium-voltage direct-hanging type direct-current microgrid system according to claim 1, characterized in that a two-stage lightning protection design is adopted for a relay protection device of the 10kV medium-voltage direct-hanging type direct-current microgrid system; the power module N-2 is designed in a redundant mode, and a redundant mode is seamlessly switched; monitoring the online insulation of key devices; the double isolation is safer, the state of the whole system is sensed, and the state maintenance is changed from the timing maintenance.
5. The 10kV medium-voltage direct-hanging type direct-current microgrid system according to claim 1, wherein the 10kV medium-voltage direct-hanging type direct-current microgrid system comprises:
the intelligent speed regulation fan system intelligently regulates speed, and the fan wheel patrols the work;
the power module unit is in modular design, is installed in a drawer mode, and is inserted and pulled out of a contact finger;
safety protection measures, condensation prevention and humidity control;
and low-loss standby, the power is partially dormant when in standby, and the standby power consumption is less than 500W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010363601.4A CN111600332A (en) | 2020-04-30 | 2020-04-30 | 10kV medium-voltage direct-hanging type direct-current micro-grid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010363601.4A CN111600332A (en) | 2020-04-30 | 2020-04-30 | 10kV medium-voltage direct-hanging type direct-current micro-grid system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111600332A true CN111600332A (en) | 2020-08-28 |
Family
ID=72186891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010363601.4A Withdrawn CN111600332A (en) | 2020-04-30 | 2020-04-30 | 10kV medium-voltage direct-hanging type direct-current micro-grid system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111600332A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578166A (en) * | 2015-01-29 | 2015-04-29 | 国家电网公司 | Alternating current-direct current micro-grid system on basis of electricity energy collector |
| CN205544337U (en) * | 2016-04-20 | 2016-08-31 | 三峡大学 | City direct -current power distribution system suitable for new forms of energy and electric automobile insert |
| CN109066822A (en) * | 2018-07-18 | 2018-12-21 | 清华大学 | A kind of multi-point dispersion formula distribution system dispatching method based on electric power electric transformer |
| CN109347357A (en) * | 2018-10-09 | 2019-02-15 | 特变电工新疆新能源股份有限公司 | A kind of four port electric power electric transformers |
| CN110690731A (en) * | 2019-08-20 | 2020-01-14 | 东南大学 | Power electronic transformer applicable to hybrid micro-grid and coordination control and mode switching method thereof |
-
2020
- 2020-04-30 CN CN202010363601.4A patent/CN111600332A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578166A (en) * | 2015-01-29 | 2015-04-29 | 国家电网公司 | Alternating current-direct current micro-grid system on basis of electricity energy collector |
| CN205544337U (en) * | 2016-04-20 | 2016-08-31 | 三峡大学 | City direct -current power distribution system suitable for new forms of energy and electric automobile insert |
| CN109066822A (en) * | 2018-07-18 | 2018-12-21 | 清华大学 | A kind of multi-point dispersion formula distribution system dispatching method based on electric power electric transformer |
| CN109347357A (en) * | 2018-10-09 | 2019-02-15 | 特变电工新疆新能源股份有限公司 | A kind of four port electric power electric transformers |
| CN110690731A (en) * | 2019-08-20 | 2020-01-14 | 东南大学 | Power electronic transformer applicable to hybrid micro-grid and coordination control and mode switching method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101697418B (en) | Photovoltaic inversion grid-connection and harmonic suppression hybrid system for micro grid and composite control method thereof | |
| CN112421670B (en) | Intermediate-frequency flexible direct-current power transmission system suitable for sending out wind power from open sea and control method thereof | |
| CN110829478A (en) | Low-frequency alternating-current uncontrolled rectification power transmission system of offshore wind power plant | |
| CN110829479A (en) | High-frequency uncontrolled rectification direct-current power transmission system of offshore wind farm | |
| CN103023344B (en) | A kind of general intelligent grid power electronic equipment | |
| CN111600321A (en) | 10kV medium-voltage direct-hanging type energy storage power station system | |
| CN203027153U (en) | Universal smart power grid power electronic device | |
| CN102148501B (en) | Disturbance generation device for wind power station | |
| CN202353232U (en) | High-voltage cascaded inverter power unit grid-connection feedback device | |
| CN105958528B (en) | A kind of zero transition dynamic combination method of Wind turbines and device | |
| CN111987725A (en) | Flexible compensation system of distribution network | |
| CN102496950A (en) | Power unit grid-connected and feedback device for high-voltage concatenated frequency converter | |
| CN203289107U (en) | Multi-access-point photovoltaic grid-connected system electrical energy quality and reactive power voltage coordination control device | |
| CN108347067A (en) | A kind of microgrid framework and control method containing battery energy storage and generator | |
| CN203589824U (en) | Renewable energy power generation, power transmission and transformation and power grid access integration system | |
| Zhao et al. | Summary and prospect of technology development of MVDC and LVDC distribution technology | |
| CN105429462B (en) | The control system of the multi-functional grid-connection converter of a kind of twin-stage and method thereof | |
| CN113036800A (en) | Flexible interconnected transformer substation structure and control method | |
| CN111600333A (en) | 10kV medium-voltage direct-hanging type photovoltaic power station system | |
| CN111600332A (en) | 10kV medium-voltage direct-hanging type direct-current micro-grid system | |
| Liu et al. | Current Status and Key Issues of HVDC Transmission Research: A Brief Review | |
| CN111591162A (en) | 10kV medium-voltage direct-hanging electric vehicle charging station system | |
| CN210074787U (en) | High-power converter circuit topological structure for offshore wind power | |
| CN208158135U (en) | A kind of microgrid framework containing battery energy storage and generator | |
| CN203466568U (en) | Energy-saving intelligent filtering compensation measurement comprehensive protection wave optimization cabinet |
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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200828 |