CN107248700B - Box-type substation and micro-grid system - Google Patents
Box-type substation and micro-grid system Download PDFInfo
- Publication number
- CN107248700B CN107248700B CN201710690591.3A CN201710690591A CN107248700B CN 107248700 B CN107248700 B CN 107248700B CN 201710690591 A CN201710690591 A CN 201710690591A CN 107248700 B CN107248700 B CN 107248700B
- Authority
- CN
- China
- Prior art keywords
- cabinet
- voltage
- low
- box
- current bus
- 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
- 238000007599 discharging Methods 0.000 claims description 36
- 230000002457 bidirectional effect Effects 0.000 claims description 34
- 238000010248 power generation Methods 0.000 claims description 26
- 238000004146 energy storage Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- 230000009466 transformation Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000012806 monitoring device Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
-
- H02J3/386—
-
- 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
Abstract
The invention provides a box-type transformer substation and a micro-grid system, which relate to the technical field of electric power and comprise a low-voltage wire inlet cabinet, a low-voltage power distribution cabinet and a four-quadrant inverter cabinet; the wire inlet end of the low-voltage wire inlet cabinet is connected with a low-voltage alternating current bus in the box-type transformer substation, and the wire outlet end of the low-voltage wire inlet cabinet is connected with the wire inlet end of the low-voltage power distribution cabinet; the first outgoing line end of the low-voltage power distribution cabinet is used for being connected with an alternating current load, and the second outgoing line end of the low-voltage power distribution cabinet is connected with the incoming line end of the four-quadrant inverter cabinet; a direct current bus is led out from an outlet end of the four-quadrant inverter cabinet; the low-voltage alternating current bus is led in from the outside of the box-type substation or led out from a transformer cabinet arranged on the box-type substation; the direct current bus connection equipment comprises one or more of the following components: direct current load, two-way DC/DC charge-discharge cabinet, photovoltaic control cabinet and fan control cabinet. The invention can make the application of the box-type transformer station in the micro-grid system more flexible and better promote the utilization efficiency of electric energy.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a box-type transformer substation and a micro-grid system.
Background
The micro-grid system (also called micro-grid) refers to a small power generation and distribution system which is formed by collecting a distributed new power supply (such as photovoltaic, wind power and the like), an energy storage device, an energy conversion device, a monitoring device, a protection device and the like. Along with the development of electric power, a micro-grid system becomes an important component in a smart grid, so that energy flows more flexibly, and the energy utilization rate is improved.
The box-type transformer substation is used as an important component in a micro-grid system and has the functions of voltage transformation, low-voltage power distribution and the like. The traditional box-type transformer substation generally comprises high-voltage switch equipment, a transformer and a low-voltage power generation and distribution device, wherein the high-voltage is only converted into low voltage and distributed, and the application scene is single; moreover, such a box-type substation can be used only for unidirectional energy flow, and if a conventional box-type substation is applied to a micro-grid system, the electric energy utilization efficiency is low.
Disclosure of Invention
In view of the above, the invention aims to provide a box-type transformer substation and a micro-grid system, which can make the application of the box-type transformer substation in the micro-grid system more flexible and better promote the utilization efficiency of electric energy.
In order to achieve the above object, the technical scheme adopted by the embodiment of the invention is as follows:
in a first aspect, an embodiment of the present invention provides a box-type substation, where the box-type substation is applied to a micro-grid system and includes at least one set of low-voltage chambers, and the low-voltage chambers include a low-voltage inlet cabinet, a low-voltage power distribution cabinet, and a four-quadrant inverter cabinet; the wire inlet end of the low-voltage wire inlet cabinet is connected with a low-voltage alternating current bus in the box-type transformer substation, and the wire outlet end of the low-voltage wire inlet cabinet is connected with the wire inlet end of the low-voltage power distribution cabinet; the first outgoing line end of the low-voltage power distribution cabinet is used for being connected with an alternating current load, and the second outgoing line end of the low-voltage power distribution cabinet is connected with the incoming line end of the four-quadrant inverter cabinet; a direct current bus is led out from an outlet end of the four-quadrant inverter cabinet; the low-voltage alternating current bus is led in from the outside of the box-type substation or led out from a transformer cabinet arranged on the box-type substation; the direct current bus connection equipment comprises one or more of the following components: direct current load, two-way DC/DC charge-discharge cabinet, photovoltaic control cabinet and fan control cabinet.
With reference to the first aspect, the embodiment of the present invention provides a first possible implementation manner of the first aspect, where the box-type substation further includes a high-voltage incoming line cabinet, a high-voltage metering cabinet and a transformer cabinet that are sequentially connected; the wire inlet end of the high-voltage wire inlet cabinet is connected with a high-voltage alternating current bus introduced from the outside of the box-type transformer substation, and the wire outlet end of the high-voltage wire inlet cabinet is connected with the wire inlet end of the high-voltage metering cabinet; the outlet end of the high-voltage metering cabinet is connected with the inlet end of the transformer cabinet; and a low-voltage alternating current bus is led out from an outlet end of the transformer cabinet.
With reference to the first possible implementation manner of the first aspect, the embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein a double split transformer is disposed in the transformer cabinet, and two symmetrical low-voltage ac buses are formed by the double split transformer in a mode of expanding unit wiring.
With reference to the second possible implementation manner of the first aspect, the embodiment of the present invention provides a third possible implementation manner of the first aspect, where the box-type substation further includes a bidirectional DC/DC charging and discharging cabinet; the wire inlet end of the bidirectional DC/DC charging and discharging cabinet is connected with the direct current bus, and the wire outlet end of the bidirectional DC/DC charging and discharging cabinet is used for being connected with a charging and discharging load; the charging and discharging load comprises an electric vehicle and/or an energy storage device; the outlet end of the bidirectional DC/DC charging and discharging cabinet is also used for being connected with a direct current load.
With reference to the first aspect or the second or third possible implementation manner of the first aspect, the embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the box-type substation further includes a photovoltaic control cabinet; the incoming line end of the photovoltaic control cabinet is connected with the direct current bus, and the outgoing line end of the photovoltaic control cabinet is used for being connected with the photovoltaic power generation device.
With reference to the first aspect or the second or third possible implementation manner of the first aspect, the embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the box-type substation further includes a fan control cabinet; the inlet wire end of the fan control cabinet is connected with the direct current bus and/or the low-voltage alternating current bus, and the outlet wire end of the fan control cabinet is used for being connected with the wind power generation device.
With reference to the first aspect, the embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the box-type substation includes a bidirectional DC/DC charging and discharging cabinet, a photovoltaic control cabinet and a fan control cabinet, which are all connected to a direct current bus.
With reference to the second possible implementation manner of the first aspect, the embodiment of the present invention provides a seventh possible implementation manner of the first aspect, wherein the box-type substation includes two groups of low-voltage chambers; the inlet wire end of the low-voltage inlet wire cabinet of each group of low-voltage chambers is respectively connected with a group of low-voltage alternating current buses formed by the double-split transformers.
With reference to the seventh possible implementation manner of the first aspect, the embodiment of the present invention provides an eighth possible implementation manner of the first aspect, where the box-type substation includes two sets of devices respectively connected to dc buses led out from two sets of low-voltage chambers; each set of equipment includes one or more of the following: bidirectional DC/DC charging and discharging cabinet, photovoltaic control cabinet and fan control cabinet.
In a second aspect, an embodiment of the present invention further provides a micro-grid system, including the box-type substation provided in any one of the possible implementation manners of the first aspect, and further including a photovoltaic power generation device, a wind power generation device, an electric vehicle, and an energy storage device connected to the box-type substation.
The embodiment of the invention provides a box-type transformer substation and a micro-grid system, wherein a wire inlet end of a low-voltage wire inlet cabinet is connected with a low-voltage alternating current bus, and the low-voltage alternating current bus can be led in from the outside of the box-type transformer substation or led out from a transformer cabinet of the box-type transformer substation; therefore, the box-type transformer substation can be applied to the occasion without high-voltage access to directly process the accessed low voltage; the power supply can also be applied to occasions requiring high-voltage power transformation. In addition, the direct current bus connection equipment led out from the wire outlet end of the four-quadrant inverter cabinet comprises one or more of a direct current load, a bidirectional DC/DC charging and discharging cabinet, a photovoltaic control cabinet and a fan control cabinet, and the bidirectional DC/DC charging and discharging cabinet, the photovoltaic control cabinet and the fan control cabinet can be flexibly selected according to actual occasions so as to realize bidirectional flow of energy, so that the electric energy utilization efficiency is further improved.
Furthermore, the box-type transformer substation provided by the embodiment of the invention can further comprise a high-voltage wire inlet cabinet, a high-voltage metering cabinet and a transformer cabinet, wherein a double-split transformer can be arranged in the transformer cabinet, and symmetrical double alternating current buses are formed, so that electromagnetic interference and circulation influence among branches are effectively reduced, output current harmonic waves are smaller, and output electric energy quality is effectively improved.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part will be obvious from the description, or may be learned by practice of the techniques of the disclosure.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic structural diagram of a first box-type substation according to an embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a second box-type substation according to an embodiment of the present invention;
fig. 3 shows a schematic structural diagram of a third box-type substation according to an embodiment of the present invention;
fig. 4 shows a schematic structural diagram of a fourth box-type substation according to an embodiment of the present invention;
fig. 5 shows a schematic structural diagram of a fifth box-type substation according to an embodiment of the present invention;
fig. 6 shows a schematic structural diagram of a micro-grid system according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Considering that the traditional box-type substation in the prior art has single application scene and low electric energy utilization efficiency, the method cannot be well applied to a micro-grid system. In order to improve the problems, the embodiment of the invention provides a box-type transformer substation and a micro-grid system. Embodiments of the present invention are described in detail below.
Embodiment one:
referring to the schematic structural diagram of a first box-type substation shown in fig. 1, the box-type substation is applied to a micro-grid system and comprises at least one group of low-voltage chambers, wherein the low-voltage chambers comprise a low-voltage wire inlet cabinet 10, a low-voltage power distribution cabinet 20 and a four-quadrant inverter cabinet 30;
the wire inlet end of the low-voltage wire inlet cabinet 10 is used for being connected with a low-voltage alternating current bus in the box-type substation, wherein the low-voltage alternating current bus is led in from the outside of the box-type substation or led out from a transformer cabinet arranged in the box-type substation; the wire outlet end of the low-voltage wire inlet cabinet 10 is connected with the wire inlet end of the low-voltage power distribution cabinet 20; the first outlet end of the low-voltage power distribution cabinet 20 is used for being connected with an alternating current load L ac The second wire outlet end of the low-voltage power distribution cabinet 20 is connected with the wire inlet end of the four-quadrant inverter cabinet 30; a direct current bus is led out from the outlet end of the four-quadrant inverter cabinet 30; in fig. 1, a dc bus is shown simultaneously with a dc load L dc The bidirectional DC/DC charging and discharging cabinet 40a, the photovoltaic control cabinet 40b and the fan control cabinet 40c are connected. In addition, an ac bus is also shown interfacing with the fan control cabinet 40c. It should be noted that, the fan control cabinet 40c integrating inversion rectification and switching control may include an AC-DC-AC double inversion device therein to process the AC generated by the fan power generation device and then transfer the processed AC to the AC bus, or may include an AC-DC inversion rectification device to invert the AC generated by the fan power generation device into DC and then transfer the DC to the DC bus. During specific implementation, the corresponding function of the fan control cabinet can be selected according to actual conditions, and the fan power generation device can be flexibly connected to the alternating current bus and/or the direct current bus. In practical application, the high-voltage wire inlet cabinet and the high-voltage metering cabinet can be assembled in parallel and are connected with the transformer cabinet through cables;
the wire inlet end of the bidirectional DC/DC charging and discharging cabinet 40a is connected with a direct current bus, and the wire outlet end of the bidirectional DC/DC charging and discharging cabinet 40a is used for being connected with a charging and discharging load; the charge-discharge load comprises an electric vehicle and/or an energy storage device; in addition, the outlet terminal of the bidirectional DC/DC charging/discharging cabinet 40a is also used for connection to a DC load. The incoming line end of the photovoltaic control cabinet 40b is connected with the direct current bus, and the outgoing line end of the photovoltaic control cabinet 40b is used for being connected with a photovoltaic power generation device. The inlet end of the fan control cabinet 40c is connected with the direct current bus and the alternating current bus, and the outlet end of the fan control cabinet 40c is used for being connected with a wind power generation device. In practical applications, since the wind power generation device generates ac power, the fan control cabinet 40c may be selected to be connected to only the ac bus for simplicity.
In practical application, the equipment connected with the direct current bus can comprise one or more of a direct current load, a bidirectional DC/DC charging and discharging cabinet, a photovoltaic control cabinet and a fan control cabinet, and the equipment is flexibly arranged according to the practical application occasion that the box-type transformer station is arranged in the micro-grid system. One or more of the bidirectional DC/DC charging and discharging cabinet, the photovoltaic control cabinet and the fan control cabinet can be arranged in the box-type substation as required to form a component part of the box-type substation.
The inlet end of the low-voltage inlet cabinet is connected with the low-voltage alternating current bus, and the low-voltage alternating current bus can be led in from the outside of the box-type substation or led out from the transformer cabinet of the box-type substation; therefore, the box-type transformer substation can be applied to the occasion without high-voltage access to directly process the accessed low voltage; the power supply can also be applied to occasions requiring high-voltage power transformation. In addition, the direct current bus connection equipment led out from the wire outlet end of the four-quadrant inverter cabinet comprises one or more of a direct current load, a bidirectional DC/DC charging and discharging cabinet, a photovoltaic control cabinet and a fan control cabinet, and the bidirectional DC/DC charging and discharging cabinet, the photovoltaic control cabinet and the fan control cabinet can be flexibly selected according to actual occasions so as to realize bidirectional flow of energy, so that the electric energy utilization efficiency is further improved.
The first box-type substation shown in fig. 1 can be directly applied to occasions without high-voltage access. In order to make the box-type substation apply to the occasion that needs the high voltage transformation, see the structure schematic diagram of the second box-type substation shown in fig. 2, on the basis of fig. 1, the box-type substation may further include a high voltage incoming line cabinet 50, a high voltage metering cabinet 60 and a transformer cabinet 70 that are connected in sequence; the transformer cabinet may include a circuit breaker, an isolating switch, a current transformer, a transformer, and the like, and will not be described herein.
The wire inlet end of the high-voltage wire inlet cabinet 50 is used for being connected with a high-voltage alternating current bus introduced from the outside of the box-type transformer substation, and the wire outlet end of the high-voltage wire inlet cabinet 50 is connected with the wire inlet end of the high-voltage metering cabinet 60; the outlet end of the high-voltage metering cabinet 60 is connected with the inlet end of the transformer cabinet 70; the outlet end of the transformer cabinet 70 leads out a low-voltage alternating current bus. In the concrete implementation, the transformer cabinet and the low-voltage wire inlet cabinet can be connected through the busbar.
The high-voltage power transformation equipment such as the high-voltage wire inlet cabinet, the high-voltage metering cabinet and the transformer cabinet is added to the box-type transformer substation, so that the box-type transformer can be well applied to a scene requiring high voltage access in a micro-grid system.
In order to further improve the electric energy quality, preferably, a double-split transformer is arranged in the transformer cabinet, and two groups of symmetrical low-voltage alternating current buses are formed by the double-split transformer in an expanding unit wiring mode. Referring to the schematic structural diagram of the third box-type substation shown in fig. 3, on the basis of fig. 2, fig. 3 shows that symmetrical double ac buses are led out of a transformer cabinet 70, namely a first low-voltage ac bus and a second low-voltage ac bus, each group of low-voltage ac buses is connected with a group of low-voltage chambers, specifically, is connected with the inlet wire end of a low-voltage inlet wire cabinet of the low-voltage chamber, each group of four-quadrant inverter cabinet of the low-voltage chamber is led out of a group of direct-current buses, namely a first direct-current bus and a second direct-current bus, wherein fig. 3 shows that the first low-voltage ac bus and the second low-voltage ac bus are connected with a fan control cabinet 40c, and the first direct-current bus and the second direct-current bus are connected with a direct-current load L dc A bi-directional DC/DC charge-discharge cabinet 40a, a photovoltaic control cabinet 40b and a fan control cabinet 40c. In practical application, each group of alternating current buses can be selectively connected with a fan control cabinet, and each group of direct current buses can be selectively connected with a direct current load, a bidirectional DC/DC charging and discharging cabinet, a photovoltaic control cabinet and fan controlOne or more of the cabinets. The types of the devices connected with the first direct current bus and the second direct current bus can be the same or different.
The box-type transformer substation adopts the double-split transformer, realizes electric isolation between the two inverters by means of the structural advantage of the double-split transformer, reduces electromagnetic interference and circulation influence between the two branches, can enable output current harmonic waves to be smaller, and effectively improves output electric energy quality.
Referring to the structural schematic diagram of the fourth box-type substation shown in fig. 4, one energy flow direction of the box-type substation is shown, and on the basis of fig. 3, it is also shown that the bidirectional DC/DC charging and discharging cabinet 40a includes a plurality of DC/DC modules for respectively mixing with the direct current load L dc The electric vehicle 501a is connected to the energy storage device 502a. The electric vehicle 501a belongs to a mobile energy storage device, and is controlled by the bidirectional DC/DC charging and discharging cabinet 40a to realize bidirectional flow of energy through charging and discharging of a battery of the electric vehicle, so that electric energy can be obtained from the micro-grid system when the electric quantity is insufficient, and electric energy can be provided for the micro-grid system when the electric quantity is sufficient and the micro-grid system needs electric energy scheduling. The energy storage device may include an energy storage battery, and the like, and similarly, bidirectional flow of energy can be realized through charge and discharge under the control of the bidirectional DC/DC charge and discharge cabinet 40 a. Further, a photovoltaic power generation device 50b connected to the photovoltaic control cabinet 40b, and a wind power generation device 50c connected to the wind turbine control cabinet 40c are shown. The photovoltaic power generation device 50b generates AC power, and the photovoltaic control cabinet 40b may be used to perform AC-DC-AC double inversion to connect the processed AC power to the AC bus, or the photovoltaic control cabinet 40b may be used to perform AC-DC inversion rectification to connect the processed DC power to the DC bus. The box-type transformer substation processes the electric energy generated by the photovoltaic power generation device and the wind power generation device and provides the electric energy for the micro-grid system, so that the energy utilization rate of the micro-grid system is further improved.
Referring to the schematic structural diagram of the fifth box-type substation shown in fig. 5, the box-type substation comprises a low-voltage chamber consisting of a low-voltage wire inlet cabinet, a low-voltage power distribution cabinet and a four-quadrant inverter cabinet, and optional modules; the selectable modules comprise high-voltage power transformation equipment consisting of a high-voltage wire inlet cabinet, a high-voltage metering cabinet and a transformer, and modules such as a photovoltaic control cabinet, a fan control cabinet, a bidirectional DC/DC charging and discharging cabinet and the like. In practical application, one or more of the selectable modules can be flexibly selected. That is, the internal structure of the box-type substation can be modularly selected according to different compositions of the actual micro-grid system.
For example, when high-voltage connection is not needed in the micro-grid system, a high-voltage part is not needed to be arranged in the box-type transformer substation, and low-voltage alternating current is directly connected into the low-voltage wire inlet cabinet. When the micro-grid system comprises a wind power generation device, a fan control cabinet can be added in the box-type transformer substation. When the micro-grid system comprises a photovoltaic power generation device, a photovoltaic control cabinet can be added in the box-type transformer substation. When the electric vehicle is taken as a mobile energy storage end in the micro-grid system, and energy interaction can be carried out between the electric vehicle and the electric vehicle through charging and discharging of the electric vehicle, a bidirectional DC/DC charging and discharging cabinet can be added in the box-type transformer substation. Of course, if no vehicle charge and discharge needs exist in the microgrid system, a bidirectional DC/DC charge and discharge cabinet is not required to be arranged in the box-type transformer substation.
It should be noted that when the transformer in the selected high voltage transformation apparatus is a double split transformer, then the box-type substation should comprise two sets of low voltage compartments, namely two low voltage inlet cabinets, two low voltage distribution cabinets and two four-quadrant inverter cabinets; the box-type transformer station comprises two sets of equipment connected with two groups of direct current buses led out by two four-quadrant inverter cabinets; each set of equipment includes one or more of the following: bidirectional DC/DC charging and discharging cabinet, photovoltaic control cabinet and fan control cabinet. That is, the equipment associated with each low voltage chamber (such as the direct current load, photovoltaic control cabinet, fan control cabinet, and bi-directional DC/DC charging and discharging cabinet) may be the same or different.
According to the box-type substation provided by the embodiment, the equipment in the box body is configured in a modularized manner, so that the internal equipment of the box-type substation can be increased or decreased according to the actual situation of the micro-grid system, the box-type substation can be flexibly applied to different occasions in the micro-grid system, the modules are selected according to the actual situation of the micro-grid, and the electric energy utilization efficiency can be effectively improved.
Embodiment two:
the present embodiment provides a micro-grid system, referring to a schematic structural diagram of a micro-grid system shown in fig. 6, which includes any of the box-type substations 100 provided in the foregoing embodiment, and further includes a photovoltaic power generation device 50b, a wind power generation device 50c, an electric vehicle 501a, and an energy storage device 502a connected to the box-type substations.
The foregoing is merely an implementation of a micro-grid system in this embodiment, and it is understood that the micro-grid system may have various implementations, such as that some micro-grid systems are not provided with wind power generation devices, and should not be considered as limiting. In addition, the micro-grid system may further include other devices such as a monitoring device, a protection device, etc., which are not shown in fig. 6 for brevity.
It will be clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the system described above may refer to the corresponding process in the foregoing embodiment, which is not described in detail herein.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The box-type transformer substation is characterized by being applied to a micro-grid system and at least comprising a group of low-voltage chambers, wherein each low-voltage chamber comprises a low-voltage wire inlet cabinet, a low-voltage power distribution cabinet and a four-quadrant inverter cabinet;
the wire inlet end of the low-voltage wire inlet cabinet is used for being connected with a low-voltage alternating current bus in the box-type transformer substation, and the wire outlet end of the low-voltage wire inlet cabinet is connected with the wire inlet end of the low-voltage power distribution cabinet; the first outgoing line end of the low-voltage power distribution cabinet is used for being connected with an alternating current load, and the second outgoing line end of the low-voltage power distribution cabinet is connected with the incoming line end of the four-quadrant inverter cabinet; a direct current bus is led out from an outlet end of the four-quadrant inverter cabinet;
the low-voltage alternating current bus is led in from the outside of the box-type substation or led out from a transformer cabinet arranged on the box-type substation; the direct current bus connection equipment comprises one or more of the following components: direct current load, two-way DC/DC charge-discharge cabinet, photovoltaic control cabinet and fan control cabinet.
2. The box-type substation according to claim 1, further comprising a high-voltage inlet wire cabinet, a high-voltage metering cabinet and a transformer cabinet connected in sequence;
the wire inlet end of the high-voltage wire inlet cabinet is used for being connected with a high-voltage alternating current bus introduced from the outside of the box-type transformer substation, and the wire outlet end of the high-voltage wire inlet cabinet is connected with the wire inlet end of the high-voltage metering cabinet; the outgoing line end of the high-voltage metering cabinet is connected with the incoming line end of the transformer cabinet; and a low-voltage alternating current bus is led out from an outlet end of the transformer cabinet.
3. The box-type substation according to claim 2, characterized in that a double split transformer is arranged in the transformer cabinet, from which two sets of low-voltage ac buses are formed symmetrically in a manner of enlarged cell wiring.
4. A box-type substation according to claim 3, characterized in that it further comprises a bidirectional DC/DC charging and discharging cabinet; the wire inlet end of the bidirectional DC/DC charging and discharging cabinet is connected with the direct current bus, and the wire outlet end of the bidirectional DC/DC charging and discharging cabinet is used for being connected with a charging and discharging load; the charging and discharging load comprises an electric vehicle and/or an energy storage device;
the outlet end of the bidirectional DC/DC charging and discharging cabinet is also used for being connected with a direct current load.
5. The box-type substation according to claim 1 or 3 or 4, characterized in that it further comprises a photovoltaic control cabinet; the incoming line end of the photovoltaic control cabinet is connected with the direct current bus, and the outgoing line end of the photovoltaic control cabinet is used for being connected with the photovoltaic power generation device.
6. The box-type substation according to claim 1 or 3 or 4, characterized in that it further comprises a fan control cabinet; the inlet wire end of the fan control cabinet is connected with the direct current bus and/or the low-voltage alternating current bus, and the outlet wire end of the fan control cabinet is used for being connected with a wind power generation device.
7. The box-type substation according to claim 1, characterized in that it comprises a bidirectional DC/DC charging and discharging cabinet, a photovoltaic control cabinet and a fan control cabinet, all of which are connected to the direct current bus.
8. A box-type substation according to claim 3, characterized in that it comprises two sets of said low-voltage chambers;
and the inlet wire ends of the low-voltage inlet wire cabinets of each group of low-voltage chambers are respectively connected with a group of low-voltage alternating current buses formed by the double-split transformers.
9. The box-type substation according to claim 8, characterized in that it comprises two sets of equipment respectively connected to two sets of direct-current buses led out from the low-voltage chambers; each set of said devices comprises one or more of the following: bidirectional DC/DC charging and discharging cabinet, photovoltaic control cabinet and fan control cabinet.
10. A microgrid system comprising the box-type substation according to any one of claims 1-9, and further comprising a photovoltaic power generation device, a wind power generation device, an electric vehicle and an energy storage device connected to the box-type substation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710690591.3A CN107248700B (en) | 2017-08-14 | 2017-08-14 | Box-type substation and micro-grid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710690591.3A CN107248700B (en) | 2017-08-14 | 2017-08-14 | Box-type substation and micro-grid system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107248700A CN107248700A (en) | 2017-10-13 |
| CN107248700B true CN107248700B (en) | 2023-09-19 |
Family
ID=60013458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710690591.3A Active CN107248700B (en) | 2017-08-14 | 2017-08-14 | Box-type substation and micro-grid system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107248700B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108206531A (en) * | 2017-12-28 | 2018-06-26 | 深圳市科陆电子科技股份有限公司 | Circuit and middle buckling stream case applied to energy storage frequency modulation system |
| CN108964007B (en) * | 2018-07-31 | 2020-07-07 | 珠海格力电器股份有限公司 | Direct-current power distribution method, device and system |
| CN110224432A (en) * | 2019-06-13 | 2019-09-10 | 乐山一拉得电网自动化有限公司 | A kind of box-type substation and its microgrid system control method |
| CN110233479A (en) * | 2019-06-13 | 2019-09-13 | 乐山一拉得电网自动化有限公司 | A kind of transformer substation system control method with micro-grid system |
| CN113890007B (en) * | 2020-07-02 | 2023-11-21 | 中国移动通信集团设计院有限公司 | Preassembled power supply and distribution system |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570455A (en) * | 2012-01-12 | 2012-07-11 | 天津市电力公司 | Intelligent microgrid power-supply system |
| CN103407383A (en) * | 2013-07-29 | 2013-11-27 | 华北电力大学（保定） | Bidirectional interactive type DC (direct-current) traction power supply system base on new energy |
| CN103448573A (en) * | 2013-07-29 | 2013-12-18 | 华北电力大学（保定） | High-voltage direct-current tractive power supply system of bidirectional interactive electrified railway |
| WO2014101497A1 (en) * | 2012-12-31 | 2014-07-03 | 国家电网公司 | Alternating current-direct current hybrid micro-grid system and control method therefor |
| CN103996986A (en) * | 2014-06-09 | 2014-08-20 | 安徽赛瑞储能设备有限公司 | Box type energy storage transformer substation structure |
| CN103997046A (en) * | 2014-06-09 | 2014-08-20 | 安徽赛瑞储能设备有限公司 | Switching control method of energy storage unit of box-type energy storage substation |
| CN104701883A (en) * | 2015-03-25 | 2015-06-10 | 国家电网公司 | Concentrated monitoring type light-storing micro-grid solar photovoltaic generating system |
| CN204741286U (en) * | 2015-04-02 | 2015-11-04 | 南京旷森电气技术有限公司 | Little electric wire netting electrical connection mode |
| CN205176917U (en) * | 2015-10-22 | 2016-04-20 | 国网吉林省电力有限公司电力科学研究院 | Take into account microgrid energy storage power station system of economic nature aassessment |
| CN206135505U (en) * | 2016-11-07 | 2017-04-26 | 三峡大学 | Little electric wire netting suitable for electric automobile difference demand of charging |
| CN206992498U (en) * | 2017-08-14 | 2018-02-09 | 青岛特来电新能源有限公司 | Box-type substation and micro-grid system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9136732B2 (en) * | 2011-10-15 | 2015-09-15 | James F Wolter | Distributed energy storage and power quality control in photovoltaic arrays |
-
2017
- 2017-08-14 CN CN201710690591.3A patent/CN107248700B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570455A (en) * | 2012-01-12 | 2012-07-11 | 天津市电力公司 | Intelligent microgrid power-supply system |
| WO2014101497A1 (en) * | 2012-12-31 | 2014-07-03 | 国家电网公司 | Alternating current-direct current hybrid micro-grid system and control method therefor |
| CN103407383A (en) * | 2013-07-29 | 2013-11-27 | 华北电力大学（保定） | Bidirectional interactive type DC (direct-current) traction power supply system base on new energy |
| CN103448573A (en) * | 2013-07-29 | 2013-12-18 | 华北电力大学（保定） | High-voltage direct-current tractive power supply system of bidirectional interactive electrified railway |
| CN103996986A (en) * | 2014-06-09 | 2014-08-20 | 安徽赛瑞储能设备有限公司 | Box type energy storage transformer substation structure |
| CN103997046A (en) * | 2014-06-09 | 2014-08-20 | 安徽赛瑞储能设备有限公司 | Switching control method of energy storage unit of box-type energy storage substation |
| CN104701883A (en) * | 2015-03-25 | 2015-06-10 | 国家电网公司 | Concentrated monitoring type light-storing micro-grid solar photovoltaic generating system |
| CN204741286U (en) * | 2015-04-02 | 2015-11-04 | 南京旷森电气技术有限公司 | Little electric wire netting electrical connection mode |
| CN205176917U (en) * | 2015-10-22 | 2016-04-20 | 国网吉林省电力有限公司电力科学研究院 | Take into account microgrid energy storage power station system of economic nature aassessment |
| CN206135505U (en) * | 2016-11-07 | 2017-04-26 | 三峡大学 | Little electric wire netting suitable for electric automobile difference demand of charging |
| CN206992498U (en) * | 2017-08-14 | 2018-02-09 | 青岛特来电新能源有限公司 | Box-type substation and micro-grid system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107248700A (en) | 2017-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107248700B (en) | Box-type substation and micro-grid system | |
| EP3508371B1 (en) | Charging post | |
| CN103606943A (en) | Microgrid nickel-metal hydride battery energy storage system | |
| US10284115B2 (en) | Inverter system | |
| CN105262436A (en) | Photovoltaic power system and communication base station electric power all-in-one machine | |
| CN112421679A (en) | Electrical wiring structure based on hybrid micro-grid and energy flowing method thereof | |
| CN102208825A (en) | Solar photovoltaic power generation system with energy networking function | |
| Mägi | Utilization of electric vehicles connected to distribution substations for peak shaving of utility network loads | |
| CN107769189B (en) | DC micro-grid structure | |
| CN109672260A (en) | A kind of energy-storage system of high-frequency isolation transformation | |
| CN202076961U (en) | Solar photovoltaic power system with energy networking function | |
| CN206992498U (en) | Box-type substation and micro-grid system | |
| CN204794118U (en) | Domestic energy storage system with from adaptability | |
| Rai et al. | Review of DC Microgrid system with Various Power Quality Issues in “Real Time Operation of DC Microgrid Connected System | |
| CN210183012U (en) | Power transmission system | |
| CN112564174A (en) | Intelligent photovoltaic combined net cage and system | |
| CN208015378U (en) | Distribution type photovoltaic energy storage system and solar photovoltaic generation system | |
| CN103326453B (en) | Megawatt converting technique research and development platform | |
| CN208094203U (en) | A kind of container load distributed battery accumulation power supply system | |
| CN207304020U (en) | Distribution system and low-voltage distribution system | |
| Vadhera | Comparative analysis between SMES and BESS in application of VSC-HVDC system | |
| Liu et al. | A resilient hybrid energy power system | |
| CN220711123U (en) | Micro-grid system | |
| CN220382766U (en) | Integrated energy source integrated module and integrated energy source system | |
| CN109474004A (en) | Photovoltaic Building Integration micro-capacitance sensor architectural schemes |
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 | ||
| CB02 | Change of applicant information |
Address after: 266000 Shandong Province, Qingdao city Laoshan District Songling Road No. 336 Applicant after: Telai New Energy Co.,Ltd. Applicant after: QINGDAO TGOOD ELECTRIC Co.,Ltd. Address before: 266000 Shandong Province, Qingdao city Laoshan District Songling Road No. 336 Applicant before: QINGDAO TELD NEW ENERGY Co.,Ltd. Applicant before: QINGDAO TGOOD ELECTRIC Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201016 Address after: 266000 Shandong Province, Qingdao city Laoshan District Songling Road No. 336 Applicant after: QINGDAO TGOOD ELECTRIC Co.,Ltd. Address before: 266000 Shandong Province, Qingdao city Laoshan District Songling Road No. 336 Applicant before: Telai New Energy Co.,Ltd. Applicant before: QINGDAO TGOOD ELECTRIC Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211213 Address after: Room 1001, 10th floor, no.336, Songling Road, Laoshan District, Qingdao City, Shandong Province 266000 Applicant after: Qingdao teltel New Energy Technology Co.,Ltd. Address before: 266000 No. 336 Songling Road, Laoshan District, Qingdao City, Shandong Province Applicant before: QINGDAO TGOOD ELECTRIC Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |