Centralized energy storage, current conversion and voltage boosting all-in-one machine adaptive to 1 / 6 C multiplying power charging and discharging energy storage container

Abstract

The utility model discloses a centralized energy storage, conversion and boosting all-in-one machine adaptive to a 1 / 6C multiplying power charging and discharging energy storage container, and belongs to the technical field of new energy power station power distribution equipment. Comprising a box transformer substation box body and three 1250kW energy storage converters, the interior of the box transformer substation body is divided into a transformer chamber, a high-voltage chamber and a low-voltage chamber. The six energy storage battery containers on the direct-current side are connected with the energy storage converter through cables, the energy storage converter is connected with the low-voltage side of the transformer through copper bars, the high-voltage side of the transformer is connected with the high-voltage switch through copper bars, and a cable hole is formed in the lower portion of the high-voltage switch and connected into a local power grid. An SCB13 type dry-type transformer is mounted in the transformer chamber; a circuit breaker switch, a lightning arrester, a current transformer and other electrical elements are installed in the high-voltage chamber. The low-voltage chamber is provided with a low-voltage frame cabinet composed of low-voltage elements and an auxiliary transformer. The device is higher in integration level, better in heat dissipation effect, lower in cost and capable of meeting the requirement for large capacity at present.

Description

Technical Field

[0001] The present invention relates to a centralized energy storage, current conversion and voltage boosting integrated machine adapted to a 1 / 6C rate charging and discharging energy storage container, belonging to the technical field of power distribution equipment of new energy power stations. Background Art

[0002] The description of the background technology in the present invention belongs to the related technology related to the present invention, which is only used to illustrate and facilitate the understanding of the invention content of the present invention, and should not be understood as the applicant explicitly believes or inferred that the applicant believes that it is the prior art of the present invention on the filing date of the first application.

[0003] With the development of new energy, the demand for energy storage configuration is increasing. At present, electrochemical energy storage batteries are widely used in my country. Electrochemical energy storage batteries generate direct current, which requires current conversion equipment and voltage conversion equipment to convert between the power grid. At present, the energy storage converter and the traditional box transformer are integrated into an energy storage converter and booster in one machine on the market. The most widely used is the centralized energy storage converter and booster in one machine, which is mostly used in new energy power stations and grid-side energy storage stations. At present, the charge and discharge rate is mostly 0.5C, and a few are 1C and 0.25C. With the development of the market, an energy storage power station for large factories or communities has been proposed. This type of power station has a small footprint, large capacity, and a charge and discharge rate of 1 / 6C. The energy storage batteries are integrated in multiple clusters in the container. There is an urgent need for a converter and booster device equipped with energy storage batteries.

[0004] For energy storage power stations in large factories or communities, the remaining available open space is small, while the demand for energy storage battery capacity is large and the charge and discharge rate requirement is small. When industrial and commercial energy storage cabinets are used, the overall project occupies a larger area than the centralized solution at the same capacity, and the price of industrial and commercial energy storage cabinets is higher. The project also requires more accessories such as cables, and the economy is poor. There is currently a 1 / 6C rate energy storage container solution. If it is paired with a string energy storage converter and booster, the cost is too high. If a centralized solution is used, it is more difficult to select and arrange the energy storage converter. Summary of the invention

[0005] The purpose of the embodiment of the present invention is to provide a centralized energy storage converter and booster integrated machine adapted to a 1 / 6C rate charging and discharging energy storage container. Compared with conventional centralized methods and products, the centralized energy storage converter and booster integrated machine adapted to a 1 / 6C rate charging and discharging energy storage container of the present invention has greater power, higher integration, better heat dissipation effect, and lower cost per integrated machine, which meets the current demand for energy storage power stations with large capacity and a charging and discharging rate of 1 / 6C. The space utilization rate is more efficient by designing a circuit breaker switch integrated frame and a low-voltage cabinet frame, and the installation is more modular. The appropriate copper busbar connection design ensures safety and reduces costs. The layout design of reasonable air ducts and heat dissipation devices makes the heat dissipation effect better and avoids safety problems caused by overheating. Various sensors are arranged in the integrated machine to link with the system, and identification, processing and control are performed through AI intelligent algorithms to ensure safety.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A centralized energy storage converter and booster integrated machine adapted for 1 / 6C rate charge and discharge energy storage container, comprising: a box transformer and three 1250kW energy storage converters;

[0008] The box-type transformer is divided into transformer room, high voltage room and low voltage room;

[0009] The six energy storage battery containers on the DC side are connected to the energy storage inverter through cables. The energy storage inverter is connected to the low-voltage side of the transformer through copper busbars. The high-voltage side of the transformer is connected to the high-voltage switch through copper busbars. A cable hole is opened under the high-voltage switch to access the local power grid. An SCB13 dry-type transformer is installed in the transformer room. Electrical components such as circuit breakers, lightning arresters and current transformers are installed in the high-voltage room. A low-voltage frame cabinet and an auxiliary transformer composed of low-voltage components are installed in the low-voltage room.

[0010] Furthermore, the transformer box and three 1250kW energy storage converters are installed on a base.

[0011] Furthermore, a SCB13 dry-type transformer is installed in the transformer room, an axial flow fan is installed at the bottom of the transformer coil, an air inlet is opened on the bottom base of the transformer, and a fan is installed above the side panel of the transformer room; a temperature probe is installed in each coil of the transformer to monitor the temperature change of the transformer in real time and feed back to the temperature controller, and a temperature and humidity sensor is installed on the side panel of the transformer room to monitor the environment of the transformer room; a smoke alarm and an explosion-proof lamp are installed on the top of the transformer room, and the smoke alarm is connected to the trip signal.

[0012] Furthermore, a 12kV indoor high-voltage AC vacuum circuit breaker is installed in the high-voltage room, and a frame is built to fix the circuit breaker, wherein the circuit breaker isolating knife is on the lower side, the grounding knife is on the upper side, and a copper busbar is led out from the three phases of the lower part of the circuit breaker to connect the incoming cable and the lightning arrester. The lightning arrester is also fixed under the frame, and the upper part of the circuit breaker is connected to the current transformer through the copper busbar. The current transformer is installed on the base of the high-voltage room, and each phase of the current transformer is connected to the high-voltage side of the transformer through the copper busbar; voltage transformers and live displays are installed on the upper and lower ends of the circuit breaker, and electromagnetic locks and pressure plates are installed on the frame door to ensure five-protection interlocking; smoke alarms and explosion-proof lights are installed on the top of the high-voltage room, and the smoke alarm is connected to the trip signal.

[0013] Furthermore, a low-voltage cabinet and an auxiliary transformer with integrated low-voltage components are installed in the low-voltage room. The 690V side of the auxiliary transformer is connected to the lower port of the molded case circuit breaker in the low-voltage cabinet through a cable, and the upper port of the molded case circuit breaker is connected to the low-voltage side of the main transformer through a cable to draw power. The 380V side of the auxiliary transformer is connected to the switching power supply in the low-voltage cabinet, the dual power switching conversion switch and the control miniature circuit breaker switch are connected in parallel to the switching power supply, the UPS and the lead-acid battery are connected to the control miniature circuit breaker, and the surge protector is connected to the circuit in the low-voltage cabinet through a fuse-type isolating switch; the box transformer measurement and control device and the transformer temperature control device are installed on the low-voltage cabinet panel, wherein the high-voltage switch control signal, smoke sensor signal, temperature control signal, and door lock signal are connected to the box transformer measurement and control device, and the transformer temperature control device is used to monitor and control the transformer coil temperature; the heater is installed at the bottom of the low-voltage cabinet, the temperature and humidity sensor is installed on the inner panel of the low-voltage cabinet, and an exhaust fan is installed on the side panel of the low-voltage room.

[0014] The embodiments of the present invention have the following beneficial effects:

[0015] Compared with conventional centralized methods and products, the centralized energy storage converter and booster integrated machine adapted to 1 / 6C rate charging and discharging energy storage containers of the present invention has greater power, higher integration, better heat dissipation effect, and lower cost. It meets the current demand for energy storage power stations with large capacity and a charging and discharging rate of 1 / 6C. The space utilization rate is more efficient through the design of the circuit breaker switch integrated frame and the low-voltage cabinet frame, and the installation is more modular. The appropriate copper busbar connection design ensures safety and reduces costs. The layout design of reasonable air ducts and heat dissipation devices makes the heat dissipation effect better and avoids safety problems caused by overheating. Various sensors are arranged in the integrated machine to link with the system, and identification, processing and control are performed through AI intelligent algorithms to ensure safety.

[0016] In the present invention, the energy storage converter is connected to the box body through a bridge. Since the transformer and the energy storage converter are connected through a copper bar, the bridge has a variable interval of 18 mm, which increases the production and assembly fault tolerance, and the bridge has good waterproof performance. A reasonable frame is designed to integrate high-voltage switches and lightning arresters, making installation more convenient, and the frame structure has higher accuracy. Low-voltage components are also integrated in a reasonable frame cabinet, which has higher versatility, more convenient installation, and lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a primary scheme in a centralized energy storage, current conversion and boosting integrated machine adapted to a 1 / 6C rate charging and discharging energy storage container of the present invention;

[0018] Figure 2 A top view of an integrated energy storage and current conversion and boosting machine in a centralized energy storage and current conversion and boosting machine adapted to a 1 / 6C rate charging and discharging energy storage container according to the present invention;

[0019] Figure 3 It is a front view of an integrated energy storage and current conversion and boosting machine in a centralized energy storage and current conversion and boosting integrated machine adapted to a 1 / 6C rate charge and discharge energy storage container of the present invention;

[0020] Figure 4 It is a rear view of an integrated energy storage and current conversion and boosting machine in a centralized energy storage and current conversion and boosting machine adapted to a 1 / 6C rate charging and discharging energy storage container of the present invention;

[0021] Figure 5 It is a side view of an integrated energy storage, current conversion and boosting unit in a centralized energy storage, current conversion and boosting unit adapted to a 1 / 6C rate charging and discharging energy storage container according to the present invention. DETAILED DESCRIPTION

[0022] The present application is further described below in conjunction with embodiments.

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, in the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. Different embodiments can be replaced or combined, and for ordinary technicians in this field, other implementation methods can be obtained based on these embodiments without creative work.

[0024] Combined with Figure 1-5 , a centralized energy storage converter and booster integrated machine adapted for 1 / 6C rate charging and discharging energy storage container, comprising: a box transformer box and three 1250kW energy storage converters 1;

[0025] The box-type transformer is divided into transformer room 2, high voltage room 4 and low voltage room 3;

[0026] The 6 energy storage battery containers on the DC side are connected to the energy storage converter 1 through cables, and the energy storage converter 1 is connected to the low-voltage side of the transformer 22 through the copper busbar 21. The high-voltage side of the transformer 22 is connected to the high-voltage switch through the copper busbar 25. A cable hole is opened under the high-voltage switch to access the local power grid. A SCB13 dry-type transformer 22 is installed in the transformer room 2; the circuit breaker 43 switch, lightning arrester and current transformer 41 and other electrical components are installed in the high-voltage room 4; the low-voltage frame 42 cabinet composed of low-voltage components and the auxiliary transformer 32 are installed in the low-voltage room 3.

[0027] In some embodiments of the utility model, the transformer box (with a top cover 5 on the top) and three 1250kW energy storage converters 1 are installed on a base 6 (with a suspension rod 61 and a grounding copper bus 62 on the base 6).

[0028] In some embodiments of the utility model, a SCB13 dry-type transformer 22 is installed in the transformer chamber 2, and 6 axial flow fans are installed at the bottom of the transformer 22 coil for forced heat dissipation. There are enough air inlets on the bottom base of the transformer 22, and dust nets are installed on the air inlets. Six fans are installed above the side panels of the transformer chamber 2 for exhaust, forming a good heat dissipation cycle with the transformer 22 body fan to avoid overheating of the transformer 22 during operation. A temperature probe is installed in each coil of the transformer 22 to monitor the temperature change of the transformer 22 in real time and feed back to the temperature controller. When the temperature of a certain coil of the transformer 22 reaches 100°C, the transformer 22 body fan and the exhaust fan are started. When the temperature of the three coils of the transformer 22 drops below 80°C, the fan is stopped. When the temperature of a certain coil of the transformer 22 reaches 140°C, an alarm trip is performed to protect the safe operation of the components in the integrated machine. A temperature and humidity sensor is installed on the side panel of the transformer room 2 to monitor the environment of the transformer room 2. When the temperature and humidity of the transformer room 2 exceed the limit value, the exhaust fan is started to cool down and dehumidify. A smoke alarm and an explosion-proof lamp are installed on the top of the transformer room 2. The smoke alarm is connected to the trip signal. When a fire occurs, it senses and trips. The explosion-proof lamp ensures the lighting in the transformer room 2.

[0029] In some embodiments of the utility model, the high-voltage chamber 4 is equipped with a 12kV indoor high-voltage AC vacuum circuit breaker 43, and a frame 42 is built with profiles to fix the circuit breaker 43, wherein the isolating knife of the circuit breaker 43 is on the lower side, the grounding knife is on the upper side, and a copper bar is led out from the lower part of the circuit breaker 43 for each of the three phases, and the incoming cable and the lightning arrester are connected. The lightning arrester is also fixed below the frame 42, and the upper part of the circuit breaker 43 is connected to the current transformer 41 through the copper bar, and the current transformer 41 is installed on the base of the high-voltage chamber 4, and each phase of the current transformer 41 is connected to the high-voltage side of the transformer 22 through the copper bar; the upper and lower ends of the circuit breaker 43 are equipped with voltage transformers and live displays, and the electromagnetic lock and pressure plate are installed on the door of the frame 42 to ensure the five-protection interlocking. A smoke alarm and an explosion-proof lamp are installed on the top of the high-voltage chamber 4, and the smoke alarm is connected to the trip signal. When a fire occurs, it senses and trips, and the explosion-proof lamp ensures the lighting in the high-voltage chamber 4.

[0030] In some embodiments of the utility model, a low-voltage cabinet 31 and an auxiliary transformer 32 with integrated low-voltage components are installed in the low-voltage room 3. The 690V side of the auxiliary transformer 32 is connected to the lower port of the molded case circuit breaker 43 in the low-voltage cabinet 31 through a cable, and the upper port of the molded case circuit breaker 43 is connected to the low-voltage side of the main transformer 22 through a cable to draw power. The 380V side of the auxiliary transformer 32 is connected to the switching power supply in the low-voltage cabinet 31. The dual power switching conversion switch and the control miniature circuit breaker 43 of each component are connected in parallel to the switching power supply. The UPS and the lead-acid battery are connected to the control miniature circuit breaker 43, and the surge protector is connected to the circuit in the low-voltage cabinet 31 through a fuse-type isolating switch. The box transformer measurement and control device and the transformer 22 temperature control device are installed on the panel of the low-voltage cabinet 31, wherein the high-voltage switch control signal, smoke sensor signal, temperature control signal, and door lock signal are connected to the box transformer measurement and control device, and the transformer 22 temperature control device is used to monitor and control the transformer 22 coil temperature. The heater is installed at the bottom of the low-voltage cabinet 31, the temperature and humidity sensor is installed on the inner panel of the low-voltage cabinet 31, and the exhaust fan 23 (external exhaust port 24) is installed on the side panel of the low-voltage chamber 3. When the temperature in the low-voltage chamber 3 is detected to be greater than 40 degrees Celsius, the exhaust fan 24 will be started for heat dissipation. When it is lower than 30 degrees Celsius, the fan will stop running. When the humidity is detected to be greater than the set value, the heater will be started to increase the dryness in the low-voltage chamber 3. Since the lead-acid battery is heavy, the lead-acid battery and UPS are placed in the lower part of the low-voltage cabinet 31, and the components such as the micro-breaker are fixed to the mounting plate in the low-voltage cabinet 31 through the card slot and self-tapping screws.

[0031] A control method for a centralized energy storage converter and booster integrated device adapted to a 1 / 6C rate charge and discharge energy storage container comprises the following steps:

[0032] The energy storage battery box is connected to the integrated energy storage converter 1 side through a cable, and the lower port of the integrated high-voltage switch is connected to the local power grid through a cable, thereby integrating the energy storage system into the power grid system. Before the energy storage battery box is charged and discharged, the energy storage system needs to be connected to the local power grid to ensure that the high-voltage switch is closed and the transformer 22 is in a no-load state.

[0033] When the energy storage battery box is charging and discharging, the control room gives a remote signal, first controls the circuit breaker 43 in the energy storage battery box to close, and then the energy storage converter 1 works to close. At this time, the energy storage battery is charged and discharged at a certain power, the main transformer 22 enters the load state, and the components in the integrated machine are also working. The transformer 22 will generate a lot of heat when working. When it is monitored that the temperature of a certain coil of the transformer 22 reaches 100°C, the transformer 22 main body fan and the exhaust fan are started for forced heat dissipation. At this time, the heat in the transformer room 2 is taken away to the environment. When the temperature of the three coils of the transformer 22 drops below 80°C, the fan is stopped. The components in the low-voltage cabinet 31 generate a certain amount of heat when they heat up. When the temperature is monitored to exceed 40°C, the exhaust fan of the low-voltage room 3 is started for forced heat dissipation. When the heat is dissipated to a temperature below 30°C, the fan is stopped. When the energy storage battery box is fully charged or discharged, the energy storage converter 1 will automatically reduce the charging and discharging power to 0, and the main transformer 22 will return to the no-load state.

[0034] The present invention relates to a centralized energy storage converter and booster integrated machine adapted to a 1 / 6C rate charge and discharge energy storage container. Compared with conventional centralized methods and products, a single integrated machine has greater power, higher integration, better heat dissipation effect, and lower cost, and meets the current demand for energy storage power stations with large capacity and a charge and discharge rate of 1 / 6C. By designing a circuit breaker switch integrated frame and a low-voltage cabinet frame, space utilization is more efficient, and the installation is more modular. The appropriate copper busbar connection design ensures safety and reduces costs. The layout design of reasonable air ducts and heat dissipation devices makes the heat dissipation effect better and avoids safety problems caused by overheating. Various sensors are arranged in the integrated machine to link with the system, and identification, processing and control are performed through AI intelligent algorithms to ensure safety.

[0035] It should be noted that the above embodiments can be freely combined as needed. The above description is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A centralized energy storage, current conversion and boosting integrated machine adapted to 1 / 6C rate charging and discharging energy storage container, characterized in that: include: Box transformer box and three 1250kW energy storage converters; The box-type transformer is divided into transformer room, high voltage room and low voltage room; The six energy storage battery containers on the DC side are connected to the energy storage inverter through cables. The energy storage inverter is connected to the low-voltage side of the transformer through a copper busbar. The high-voltage side of the transformer is connected to the high-voltage switch through a copper busbar. A cable hole is opened under the high-voltage switch to access the local power grid. An SCB13 dry-type transformer is installed in the transformer room. Circuit breakers, lightning arresters and current transformers are installed in the high-voltage room. A low-voltage frame cabinet composed of low-voltage components and an auxiliary transformer are installed in the low-voltage room.

2. The centralized energy storage, current conversion and boosting integrated machine adapted for 1 / 6C rate charging and discharging energy storage container according to claim 1 is characterized in that: The box-type transformer box and three 1250kW energy storage converters are installed on the base.

3. The centralized energy storage, current conversion and boosting integrated machine adapted for 1 / 6C rate charging and discharging energy storage container according to claim 1 is characterized in that: A SCB13 dry-type transformer is installed in the transformer room, an axial flow fan is installed at the bottom of the transformer coil, an air inlet is opened on the bottom base of the transformer, and a fan is installed above the side panel of the transformer room; a temperature probe is installed in each coil of the transformer to monitor the temperature change of the transformer in real time and feed it back to the temperature controller, and a temperature and humidity sensor is installed on the side panel of the transformer room to monitor the environment of the transformer room; a smoke alarm and an explosion-proof lamp are installed on the top of the transformer room, and the smoke alarm is connected to a trip signal.

4. The centralized energy storage, current conversion and voltage boosting integrated machine adapted for 1 / 6C rate charge and discharge energy storage container according to claim 1 is characterized in that: A 12kV indoor high-voltage AC vacuum circuit breaker is installed in the high-voltage room, and a frame is built to fix the circuit breaker, wherein the circuit breaker isolating knife is on the lower side, the grounding knife is on the upper side, and a copper busbar is led out from the three phases of the lower part of the circuit breaker to connect the incoming cable and the lightning arrester. The lightning arrester is also fixed under the frame, and the upper part of the circuit breaker is connected to the current transformer through the copper busbar. The current transformer is installed on the base of the high-voltage room, and each phase of the current transformer is connected to the high-voltage side of the transformer through the copper busbar; voltage transformers and live displays are installed on the upper and lower ends of the circuit breaker, and electromagnetic locks and pressure plates are installed on the frame door to ensure five-protection interlocking; smoke alarms and explosion-proof lights are installed on the top of the high-voltage room, and the smoke alarm is connected to the trip signal.

5. The centralized energy storage, current conversion and boosting integrated machine adapted for 1 / 6C rate charging and discharging energy storage container according to claim 1 is characterized in that: A low-voltage cabinet and an auxiliary transformer with integrated low-voltage components are installed in the low-voltage room. The 690V side of the auxiliary transformer is connected to the lower port of the molded case circuit breaker in the low-voltage cabinet through a cable, and the upper port of the molded case circuit breaker is connected to the low-voltage side of the main transformer through a cable to draw power. The 380V side of the auxiliary transformer is connected to the switching power supply in the low-voltage cabinet, the dual power switching conversion switch and the control miniature circuit breaker switch are connected in parallel to the switching power supply, the UPS and the lead-acid battery are connected to the control miniature circuit breaker, and the surge protector is connected to the circuit in the low-voltage cabinet through a fuse-type isolating switch; the box transformer measurement and control device and the transformer temperature control device are installed on the low-voltage cabinet panel, wherein the high-voltage switch control signal, smoke sensor signal, temperature control signal, and door lock signal are connected to the box transformer measurement and control device, and the transformer temperature control device is used to monitor and control the transformer coil temperature; the heater is installed at the bottom of the low-voltage cabinet, the temperature and humidity sensor is installed on the inner panel of the low-voltage cabinet, and an exhaust fan is installed on the side panel of the low-voltage room.

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