CN210007409U - box-type substation and microgrid connection structure - Google Patents
box-type substation and microgrid connection structure Download PDFInfo
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- CN210007409U CN210007409U CN201920882201.7U CN201920882201U CN210007409U CN 210007409 U CN210007409 U CN 210007409U CN 201920882201 U CN201920882201 U CN 201920882201U CN 210007409 U CN210007409 U CN 210007409U
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Abstract
The utility model discloses a box-type substation and microgrid connection structure, the utility model belongs to the technical field of defeated power supply system, include the switch power transformation cabinet through high-power relay and grid bus connection, switch power transformation cabinet still includes a plurality of branches of being connected through branch circuit breaker and microgrid alternating current bus including main circuit breaker and the switch that is incorporated into the power networks that sets up between grid bus and microgrid alternating current bus, high-power relay's normally closed contact end and normally open contact end cross-over respectively at main circuit breaker's upper and lower both ends, and high-power relay's common port passes through load circuit breaker and connects the alternating current load end, still be connected with AC transformer between switch that is incorporated into the power networks and the microgrid alternating current bus, pass through low-voltage inlet wire cabinet and connect low-voltage distribution cabinet on at least branches, low-voltage distribution cabinet is through the AC load line connection who has load circuit breaker the microgrid direct current load end still connects microgrid direct current bus simultaneously through contravariant/cabinet, be connected with direct current.
Description
Technical Field
The utility model belongs to the technical field of defeated power supply system, concretely relates to box-type substation and microgrid connection structure.
Background
Nowadays, the box-type substation technology commonly adopted by the intermediate node of the power transmission and transformation line is greatly developed, how to efficiently utilize electric energy and improve the utilization rate become important subjects in the presence of the current energy dilemma and the increasing energy demand, and the microgrid system has the characteristics of flexibility and high efficiency in the technical field of power transmission and transformation, and the design concept of the microgrid system is very suitable for being combined with the box-type substation, so that box-type substations with higher efficiency and better applicability are formed.
The box-type transformer substation is a prefabricated substation or a prefabricated substation, comprising high-voltage switchgear, distribution transformer and low-voltage distribution equipment, and is a factory prefabricated indoor and outdoor compact distribution equipment which is arranged into bodies according to a fixed wiring scheme, namely, the functions of transformer voltage reduction, low-voltage distribution and the like are organically combined at , and the box-type transformer substation is installed at steel structure boxes which are damp-proof, rust-proof, dust-proof, rat-proof, fire-proof, theft-proof, heat-proof, totally-closed and movable, is particularly suitable for urban network construction and transformation, and is brand-new transformer substations rising after civil transformer substations.
The Micro-Grid system is also called a Micro-Grid (Micro-Grid) and can be translated into a Micro-Grid, and refers to a small power generation and distribution system consisting of a distributed power supply, an energy storage device, an energy conversion device, a load, a monitoring and protecting device and the like.
Disclosure of Invention
The utility model aims at providing box-type substation and microgrid system based on microgrid system design theory that are applicable to in the electric wire netting.
The utility model discloses an box-type substation, which is characterized by comprising a switch substation cabinet connected with a power grid bus through a high-power relay, wherein the switch substation cabinet comprises a main circuit breaker and a grid-connected switch which are arranged between the power grid bus and a microgrid alternating current bus, and a plurality of branches connected with the microgrid alternating current bus through branch circuit breakers;
the normally closed contact end and the normally open contact end of the high-power relay are respectively bridged at the upper end and the lower end of the main circuit breaker, and the common end of the high-power relay is connected with an alternating current load end through a load circuit breaker;
the microgrid grid-connected system comprises a grid-connected switch, a microgrid alternating-current bus, at least branch circuits, a low-voltage power distribution cabinet, an inverter/rectifier cabinet, a microgrid direct-current bus and a direct-current load end, wherein the grid-connected switch and the microgrid alternating-current bus are connected through an alternating-current transformer, the at least branch circuits are connected with the low-voltage power distribution cabinet through the low-voltage power distribution cabinet, the low-voltage power distribution cabinet is connected with the alternating-current load end through an alternating-current load circuit.
The coil of the high-power relay automatically switches the normally open and normally closed contact circuits of the relay according to the voltage state of the microgrid alternating current bus, so that the conversion of an alternating current load power supply between a power grid bus and the microgrid bus is realized, and the power supply stability of a power distribution load is ensured.
When the power grid is normal and the grid-connected switch is not closed, the micro-grid bus is not electrified, the normally closed contact of the high-power relay is closed, and the alternating-current load end is directly powered by the power grid; when the power grid is normal and the grid-connected switch is closed, the micro-grid bus is electrified, the high-power relay is automatically switched to a normally open contact to be closed, the alternating-current load end is switched to be powered by the micro-grid alternating-current bus and the low-voltage power distribution cabinet, and meanwhile, the micro-grid direct-current bus provides a direct-current power supply for the direct-current load end;
when the power grid fails, the switch is switched off, the energy storage unit continuously supplies power to the microgrid direct-current bus, alternating current is supplied to the microgrid alternating-current bus through the inverter/rectifier cabinet, the normally open contact of the high-power relay still keeps closed, and the load end is still supplied with power by the microgrid alternating-current bus and the microgrid direct-current bus.
The coil power supply voltage of the high-power relay is alternating current 210-230 VAC, and the load capable of connecting the contact of the high-power relay is large.
A bidirectional DC/DC charging and discharging cabinet, a photovoltaic control cabinet and a fan control cabinet are further connected below the micro-grid direct-current bus; the energy storage unit is connected below the bidirectional DC/DC charging and discharging cabinet.
The alternating current transformer is a multi-split transformer, namely, a plurality of parallel branches are connected behind the alternating current transformer.
The photovoltaic control cabinet comprises a photovoltaic power generation device for supplying power to the microgrid direct-current bus.
A fan control cabinet is also connected below the micro-grid alternating current bus; and the wind power generation device is connected with the microgrid direct-current bus and/or the microgrid alternating-current bus in a power supply mode through the wire inlet end of the fan control cabinet.
Based on above-mentioned box-type substation's technical scheme, the utility model discloses still provide kinds of microgrid connection structure, its characterized in that, foretell box-type substation still include with photovoltaic power generation device, wind power generation set and the energy memory that box-type substation meets.
The utility model has the advantages of, distribution auto-change over device constitute by high-power relay, can realize the conversion of distribution load power supply between electric wire netting and microgrid busbar, high-power relay's action response is fast, the contact load is big, conversion time tens of ms level guarantees the power supply stability of distribution load, avoids adopting the second level switching time of automatic change over switch to send out the power supply interrupt.
steps are carried out, a low-voltage incoming line cabinet in the box-type substation is connected with a low-voltage alternating-current bus, and the low-voltage alternating-current bus is led out from a transformer cabinet of the box-type substation, so that the box-type substation can be applied to occasions without high-voltage access for directly processing the accessed low voltage or occasions needing high-voltage power transformation.
The utility model provides a box-type substation can also include high-pressure inlet wire cabinet, high-pressure measurement cabinet and transformer cabinet, can be provided with many split transformers in this transformer cabinet to form stranded alternating current generating line, thereby effectively reduced electromagnetic interference and circulation influence between the branch road, make the electric current harmonic of output less, effectively improved the electric energy quality of output.
Drawings
The foregoing and following detailed description of the invention will be apparent when read in conjunction with the following drawings, in which:
fig. 1 is a schematic structural diagram of the present invention;
in the figure:
1. a high power relay; 2. a main circuit breaker; 3. a grid-connected switch; 4. an AC transformer; 5. an alternating current load end; 6. a low-voltage incoming cabinet; 7. a low-voltage power distribution cabinet; 8. an inverter/rectifier cabinet; 9. a direct current load end; 10. an energy storage unit; 11. fan switch board.
Detailed Description
The following steps are performed by using several specific embodiments to illustrate the technical solution for achieving the objectives of the present invention, and it should be noted that the technical solution claimed in the present invention includes but is not limited to the following embodiments.
Example 1
The embodiment discloses box-type substations, as shown in fig. 1, the substation comprises a switch substation cabinet connected with a power grid bus through a high-power relay 1, the switch substation cabinet comprises a main circuit breaker 2 and a grid-connected switch 3 which are arranged between the power grid bus and a microgrid alternating current bus, and further comprises a plurality of branches connected with the microgrid alternating current bus through branch circuit breakers, normally closed contact ends and normally open contact ends of the high-power relay 1 are respectively bridged at the upper end and the lower end of the main circuit breaker 2, a common end of the high-power relay 1 is connected with an alternating current load end 5 through a load circuit breaker, an alternating current transformer 4 is further connected between the grid-connected switch 3 and the microgrid alternating current bus, at least branches are connected with a low-voltage power distribution cabinet 7 through a low-voltage incoming cabinet 6, the low-voltage power distribution cabinet 7 is connected with the alternating current load end 5 through an alternating current load circuit with the load circuit breaker, and is connected with the microgrid direct current bus through an inverter/.
The coil of the high-power relay 1 automatically switches the normally open and normally closed contact circuits of the relay according to the voltage state of the microgrid alternating-current bus, so that the conversion of an alternating-current load power supply between a power grid bus and the microgrid bus is realized, and the power supply stability of a power distribution load is ensured.
The utility model has the advantages of, distribution auto-change over device constitute by high-power relay 1, can realize the conversion of distribution load power supply between electric wire netting and microgrid bus, high-power relay 1's action response is fast, the contact load is big, conversion time tens of ms grades, guarantee distribution load's power stability, avoid adopting the power supply interruption that automatic change over switch's second level switching time caused, go into steps, box-type substation medium and low voltage inlet wire cabinet 6 meets with low pressure alternating current bus, this low pressure alternating current bus is drawn forth by box-type substation's transformer cabinet, therefore this box-type substation both can use and need not the occasion of high pressure access and directly handle the low pressure of access, also can use the occasion that needs high pressure transformer.
Example 2
, based on the technical scheme of the embodiment 1, as shown in fig. 1, when the grid is normal and the grid-connected switch 3 is not closed, the micro-grid bus is not powered on, the normally closed contact of the high-power relay 1 is closed, and the alternating-current load end 5 is directly powered by the grid;
when the power grid fails, the switch is switched off, the energy storage unit 10 continuously supplies power to the microgrid direct-current bus, alternating current is supplied to the microgrid alternating-current bus through the inverter/rectifier cabinet 8, the normally open contact of the high-power relay 1 is still closed, and the load end is still supplied with power by the microgrid alternating-current bus and the microgrid direct-current bus.
The coil power supply voltage of the high-power relay 1 is alternating current 210-230 VAC, and the load capable of connecting the contact of the high-power relay 1 is large.
A bidirectional DC/DC charging and discharging cabinet, a photovoltaic control cabinet and a fan control cabinet 11 are also connected below the micro-grid direct-current bus; the energy storage unit 10 is connected below the bidirectional DC/DC charging and discharging cabinet.
The alternating current transformer 4 is a multi-split transformer, namely, the back of the alternating current transformer 4 is connected with a plurality of parallel branches; the photovoltaic control cabinet comprises a photovoltaic power generation device for supplying power to the microgrid direct-current bus; a fan control cabinet 11 is also connected below the micro-grid alternating current bus; and the wind power generation device is connected with the microgrid direct-current bus and/or the microgrid alternating-current bus in a power supply mode through the wire inlet end of the fan control cabinet 11.
Based on above-mentioned box-type substation's technical scheme, the utility model discloses still provide kinds of microgrid connection structure, its characterized in that, foretell box-type substation still include with photovoltaic power generation device, wind power generation set and the energy memory that box-type substation meets.
The utility model has the advantages of, distribution auto-change over device constitute by high-power relay 1, can realize the conversion of distribution load power supply between electric wire netting and microgrid busbar, high-power relay 1's action response is fast, the contact load is big, conversion time tens of ms level guarantees the power supply stability of distribution load, avoids adopting the second level switching time of automatic change-over switch to send the power supply interrupt.
steps are carried out, the low-voltage incoming line cabinet 6 in the box-type substation is connected with a low-voltage alternating-current bus, and the low-voltage alternating-current bus is led out from a transformer cabinet of the box-type substation, so the box-type substation can be applied to occasions without high-voltage access for directly processing the accessed low voltage or occasions requiring high-voltage transformation.
The utility model provides a box-type substation can also include high-pressure inlet wire cabinet, high-pressure measurement cabinet and transformer cabinet, can be provided with many split transformers in this transformer cabinet to form stranded alternating current generating line, thereby effectively reduced electromagnetic interference and circulation influence between the branch road, make the electric current harmonic of output less, effectively improved the electric energy quality of output.
Claims (9)
- The box-type transformer substations are characterized by comprising a switch transformer substation connected with a power grid bus through a high-power relay (1), wherein the switch transformer substation comprises a main circuit breaker (2) and a grid-connected switch (3) which are arranged between the power grid bus and a microgrid alternating-current bus, and a plurality of branches connected with the microgrid alternating-current bus through branch circuit breakers;the normally closed contact end and the normally open contact end of the high-power relay (1) are respectively bridged at the upper end and the lower end of the main circuit breaker (2), and the common end of the high-power relay (1) is connected with an alternating current load end (5) through a load circuit breaker;an alternating current transformer (4) is connected between the grid-connected switch (3) and the microgrid alternating current bus, the at least branch circuits are connected with a low-voltage power distribution cabinet (7) through a low-voltage incoming cabinet (6), the low-voltage power distribution cabinet (7) is connected with the alternating current load end (5) through an alternating current load circuit with a load circuit breaker, and is also connected with a microgrid direct current bus through an inversion/rectifier cabinet (8), and a direct current load end (9) and an energy storage unit (10) are connected below the microgrid direct current bus.
- 2. The kinds of box-type substations of claim 1, wherein the coil of the high power relay (1) switches the power supply of the ac load end (5) between the grid bus and the microgrid ac bus by automatically switching the normally open and normally closed contact circuits of the relay.
- 3. A box substation according to claim 1 or 2, characterized in that:when the power grid is normal and the grid-connected switch (3) is not closed, the micro-grid bus is not electrified, the normally closed contact of the high-power relay (1) is closed, and the alternating-current load end (5) is directly powered by the power grid;when the power grid is normal and the grid-connected switch (3) is closed, the micro-grid bus is electrified, the high-power relay (1) is automatically switched to a normally open contact to be closed, the alternating-current load end (5) is switched to be powered by the micro-grid alternating-current bus and the low-voltage power distribution cabinet (7), and meanwhile, the micro-grid direct-current bus provides a direct-current power supply for the direct-current load end (9);when the power grid fails, the switch is switched off, the energy storage unit (10) continuously supplies power to the microgrid direct-current bus, alternating current is supplied to the microgrid alternating-current bus through the inversion/rectifier cabinet (8), the normally open contact of the high-power relay (1) is still kept closed, and the load end is still supplied with power by the microgrid alternating-current bus and the microgrid direct-current bus.
- 4. The kinds of box-type substations of claim 1, wherein the coil supply voltage of the high power relay (1) is AC 210-230 VAC, and the load through which the contacts of the high power relay (1) can be connected is large.
- 5. kinds of box-type substations according to claim 1, characterized in that the AC transformer (4) is a multi-split transformer, i.e. the AC transformer (4) is connected with a plurality of parallel branches.
- 6. The kinds of box-type substations of claim 1, wherein a bidirectional DC/DC charging and discharging cabinet, a photovoltaic control cabinet and a fan control cabinet (11) are further connected below the microgrid direct current bus, and the energy storage unit (10) is connected below the bidirectional DC/DC charging and discharging cabinet.
- 7. The box-type substations of claim 6, wherein said photovoltaic control cabinets include photovoltaic power generation devices for supplying power to the microgrid direct current buses.
- 8. The kinds of box-type substations of claim 6, wherein a fan control cabinet (11) is also connected below the microgrid alternating current bus, and the wind power generation device is connected with the microgrid direct current bus and/or the microgrid alternating current bus through a line inlet end of the fan control cabinet (11) for power supply.
- The microgrid connection structure of 9 and is characterized by comprising the box-type substation of any items in claims 1, 2, 4, 5, 6, 7 and 8, and further comprising a photovoltaic power generation device, a wind power generation device and an energy storage device which are connected with the box-type substation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920882201.7U CN210007409U (en) | 2019-06-13 | 2019-06-13 | box-type substation and microgrid connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920882201.7U CN210007409U (en) | 2019-06-13 | 2019-06-13 | box-type substation and microgrid connection structure |
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| Publication Number | Publication Date |
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| CN210007409U true CN210007409U (en) | 2020-01-31 |
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| CN201920882201.7U Active CN210007409U (en) | 2019-06-13 | 2019-06-13 | box-type substation and microgrid connection structure |
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| CN (1) | CN210007409U (en) |
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Effective date of registration: 20211028 Address after: Room 1001, 10th floor, no.336, Songling Road, Laoshan District, Qingdao City, Shandong Province 266000 Patentee after: Qingdao teltel New Energy Technology Co.,Ltd. Address before: 614000 No. 2, Cha Shan Road, hi tech Zone, Sichuan, Leshan Patentee before: LESHAN ELECT ELECTRIFIED WIRE NETTING AUTOMATION Co.,Ltd. |