CN-122026239-A - Disaster-resistant multi-microgrid low-voltage interconnection device and control method thereof

CN122026239ACN 122026239 ACN122026239 ACN 122026239ACN-122026239-A

Abstract

The invention relates to a disaster-resistant multi-microgrid low-voltage interconnection device and a control method thereof, wherein the disaster-resistant multi-microgrid low-voltage interconnection device comprises a cabinet body, a first bearing frame, a second bearing frame, a low-voltage interconnection component, an external bearing frame, a floating unit, a detection unit and a guide rail, the low-voltage interconnection component is arranged in the cabinet body, the guide rail is arranged on the external bearing frame, the first bearing frame and the second bearing frame are both arranged on the guide rail, the cabinet body is arranged between the first bearing frame and the second bearing frame, the floating unit is arranged between the first bearing frame and the external bearing frame, the detection unit is arranged in the first bearing frame and the cabinet body, the low-voltage interconnection component is respectively connected with the floating unit and the detection unit, and the low-voltage interconnection component is used for receiving circuit signals between the detection units and water level signals of the detection unit and judging whether alarm signals are sent or not. When the flood level reaches the early warning condition, the floating unit provides upward buoyancy, so that the floating unit is lifted to be quickly separated from the flood inundation area.

Inventors

YE YING
XU BINGYAN
CHEN YUNFENG
ZHANG YING
GUO LEI
TANG HENG
CHEN LONG
CAO CHUN

Assignees

国网上海市电力公司

Dates

Publication Date: 20260512
Application Date: 20251230

Claims (10)

1. The utility model provides an anti-disaster multi-microgrid low-voltage interconnection device which is characterized by comprising a cabinet body (1), a first bearing frame (11), a second bearing frame (12), a low-voltage interconnection component (2), an external bearing frame (3), a floating unit (4), a detection unit and a guide rail (31), wherein the low-voltage interconnection component (2) is installed in the cabinet body (1), the guide rail (31) is installed on the external bearing frame (3), the first bearing frame (11) and the second bearing frame (12) are both installed on the guide rail (31), the cabinet body (1) is installed between the first bearing frame (11) and the second bearing frame (12), the floating unit (4) is installed between the first bearing frame (11) and the external bearing frame (3), the detection unit is installed in the first bearing frame (11) and the cabinet body (1), and the low-voltage interconnection component (2) is respectively connected with the floating unit (4) and the detection unit; The low-voltage interconnection component (2) is used for receiving the circuit signals between the detection units and the water level signals of the detection units and judging whether to send alarm signals or not.
2. The disaster-resistant multi-microgrid low-voltage interconnection device according to claim 1, wherein the floating unit (4) comprises a base (42), an air bag body (43) and a gas generator (44), the base (42) is mounted on the first bearing frame (12), the air bag body (43) is respectively connected with the base (42) of the external bearing frame (3), and the gas generator (44) is mounted on the base (42) and is located in the air bag body (43).
3. The disaster resistant multi-microgrid low voltage interconnection device according to claim 2, wherein the detection unit comprises a water containing cavity, a floating member (52), a conductive ring (53) and a diversion hole (55), wherein the water containing cavity and the diversion hole (55) are both arranged in the first bearing frame (11), the floating member (52) is placed in the water containing cavity, the diversion hole (55) is communicated with the water containing cavity, and the conductive ring (53) is installed on the floating member (52).
4. A disaster resistant multi-microgrid low voltage interconnection device according to claim 3, wherein the diversion holes (55) are obliquely arranged, and one end of the diversion holes (55) communicated with the water containing cavity is higher than the other end of the diversion holes (55).
5. A disaster-resistant multi-microgrid low-voltage interconnection device according to claim 3, further comprising a power take-off guide rod (45) and a guide sleeve, wherein the guide sleeve is mounted on the first carrying frame (11) and the cabinet body (1), and the power take-off guide rod (45) is mounted in the guide sleeve and connected with the floating member (52).
6. A disaster-resistant multi-microgrid low-voltage interconnection device according to claim 3, characterized in that the detection unit further comprises a detection groove (51) and an electrical contact (54), the detection groove (51) is arranged at the bottom of the cabinet (1), the electrical contact (54) is arranged in the detection groove (51), and the electrical contact (54) and the conductive ring (53) are aligned.
7. A disaster-resistant multi-microgrid low-voltage interconnection device according to claim 3, characterized in that the detection unit further comprises a first water level sensor (41) having a sensing end, the first water level sensor (41) being mounted on the first carrier (11), the sensing end protruding a predetermined height and being close to the external carrier (3).
8. The disaster resistant multi-microgrid low voltage interconnection device according to claim 1, wherein the second carrier (12) comprises a sliding sleeve and a positioning pin (6) with a fracture ring groove (61), the sliding sleeve is slidably connected with the guide rail (31), the sliding sleeve and the guide rail (31) are fixed through the positioning pin (6), and the fracture ring groove (61) is located at a contact position of the sliding block and the guide rail (31).
9. The disaster-resistant multi-microgrid low-voltage interconnection device according to claim 1, further comprising an anchor rod (32) and an anchor cable (33), wherein one end of the anchor cable (33) is connected with the guide rail (31), and the other end of the anchor cable (33) and the external bearing frame (3) are fixed through the anchor rod (32).
10. A control method for the disaster resistant multi-microgrid low voltage interconnection device as claimed in any one of claims 1 to 9, wherein the judging process includes: The low-voltage interconnection assembly (2) detects circuit signals of the detection unit every first preset time, judges whether the circuit fails, and sends out a first alarm signal if the circuit fails; if the low-voltage interconnection assembly (2) receives the signal of the detection unit, starting the floating unit (4) and sending a second alarm signal, wherein the cabinet body (1) slides along the guide rail (31) under the action of the floating unit (4); if the low-voltage interconnection component (2) still receives the signal of the detection unit and continues for the second preset time after the floating unit (4) is started, the low-voltage interconnection component (2) sends a third alarm signal and emergently cuts off the power; and if the low-voltage interconnection component (2) does not receive the signal of the detection unit and lasts for a third preset time after the floating unit (4) is started, the low-voltage interconnection component (2) sends a safety signal.

Description

Disaster-resistant multi-microgrid low-voltage interconnection device and control method thereof Technical Field The invention relates to the technical field of disaster-resistant power equipment, in particular to a disaster-resistant multi-microgrid low-voltage interconnection device and a control method thereof. Background The multi-microgrid system is used for guaranteeing regional power supply reliability, the multi-microgrid low-voltage interconnection device serves as a system core hub and plays important roles of low-voltage power connection, electric energy scheduling and operation control among a plurality of microgrids, and the multi-microgrid low-voltage interconnection device is widely applied to rural areas, industrial parks, remote communities and other areas which are easily affected by extreme weather. The existing multi-micro-grid interconnection device is usually fixedly installed, a cabinet body of the existing multi-micro-grid interconnection device is directly fixed on the ground or a foundation frame, when the existing multi-micro-grid interconnection device faces natural disasters such as flood, the existing multi-micro-grid low-voltage interconnection device is extremely easy to be submerged by flood, internal electric equipment such as a switch and a control unit are caused to be short-circuited, damaged or even exploded due to water inflow, huge economic loss is caused, interconnection supporting functions among micro-grids are interrupted, and the existing multi-micro-grid low-voltage interconnection device is lost in a critical disaster-resistant and electricity-protecting period. The invention patent with the publication number of CN118842407A discloses outdoor disaster-resistant photovoltaic power generation equipment, which comprises a buried frame, a surrounding stop limiting structure connected with the buried frame, a floating photovoltaic power generation structure movably connected with the connecting rod, and an electric clamping jaw movably connected with the connecting rod, wherein the electric clamping jaw is fixedly connected with a floating platform through the connecting frame, a flood sensing part is fixedly arranged on the floating platform, a deflection mechanism is arranged on the flood sensing part, a photovoltaic panel is fixedly arranged on the deflection mechanism, a controller is fixedly arranged on one side of the deflection mechanism, and a water drive power supply structure is arranged on the lower part of the floating platform. When the patent encounters flood, the limit structure of the enclosing baffle is matched with the floating photovoltaic power generation structure, so that the photovoltaic panel is prevented from being immersed, protection is provided for the photovoltaic panel, although flood prevention can be realized, the floating process is slower by the buoyancy of water, meanwhile, the floating process is not well guided, and if water flow is larger, the floating process is easy to topple. Therefore, how to quickly detach the device from the flood is an urgent problem to be solved at present. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide an anti-disaster multi-microgrid low-voltage interconnection device and a control method thereof. The aim of the invention can be achieved by the following technical scheme: According to one aspect of the invention, there is provided a disaster resistant multi-microgrid low-voltage interconnection device, comprising a cabinet body, a first bearing frame, a second bearing frame, a low-voltage interconnection assembly, an external bearing frame, a floating unit, a detection unit and a guide rail, wherein the low-voltage interconnection assembly is installed in the cabinet body, the guide rail is installed on the external bearing frame, the first bearing frame and the second bearing frame are both installed on the guide rail, the cabinet body is installed between the first bearing frame and the second bearing frame, the floating unit is installed between the first bearing frame and the external bearing frame, the detection unit is installed in the first bearing frame and the cabinet body, and the low-voltage interconnection assembly is respectively connected with the floating unit and the detection unit; the low-voltage interconnection component is used for receiving the circuit signals between the detection units and the water level signals of the detection units and judging whether to send alarm signals or not. As a preferred technical scheme, the floating unit comprises a base, an air bag main body and a gas generator, wherein the base is arranged on the first bearing frame, the air bag main body is respectively connected with an external bearing frame base, and the gas generator is arranged on the base and is positioned in the air bag main body. As the preferable technical scheme, the detection unit comprises a water containing cavity, a floating piece, a