Energy storage converter boosting all-in-one machine

Abstract

The utility model provides an energy storage converter boosting all-in-one machine, which realizes that an energy storage battery outputs electric energy to an alternating-current power grid or the alternating-current power grid charges the energy storage battery through an energy storage converter, a main transformer and a high-voltage cabinet, and obtains voltage between the main transformer and the high-voltage cabinet through an auxiliary transformer and reduces the voltage to obtain a power supply of a first-stage power distribution bus. The first-stage power distribution bus supplies power to the uninterruptible power supply and then supplies power to the second-stage power distribution bus, and the power supply of the third-stage power distribution bus is taken from the space between the energy storage battery and the energy storage converter and / or the second-stage power distribution bus. According to the scheme, starting from the whole system of the energy storage and boosting all-in-one machine, a new power distribution system is adopted, and three levels of power distribution buses are arranged according to the voltage level and the load importance degree. Compared with independent power distribution design of equipment such as an energy storage converter, a main transformer and a high-voltage cabinet in the prior art, the scheme not only improves the power supply reliability of the system, but also reduces the cost.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage converter and boost integrated machine. Background Art

[0002] With the rapid development of the energy storage industry, large-scale energy storage systems generally adopt the solution of energy storage converter and booster. The energy storage converter integrates energy storage converter (PCS, Power Conversion System), booster transformer, power communication cabinet, high-voltage cabinet and other equipment, and integrates the functions of inverter, rectification, boost, measurement and control to achieve an integrated solution.

[0003] At present, the PCS, power communication cabinet and battery compartment in the energy storage system inside the integrated machine are all powered separately. Specifically, the junction cabinet in the battery compartment is powered by UPS (Uninterruptible Power Supply) and station power supply, the PCS is powered by a DC switching power supply plus an AC auxiliary transformer for AC / DC redundant power supply, and the power communication cabinet is powered by an auxiliary transformer and UPS.

[0004] The above-mentioned separate power supply method not only fails to guarantee the power supply stability of the system, but also leads to repeated configuration of auxiliary transformers in the PCS and power communication cabinets, and repeated configuration of UPS in the power communication cabinet and battery compartment junction cabinet, resulting in waste of resources and increased system costs. Utility Model Content

[0005] This specification provides an energy storage converter booster integrated machine to solve the problem that the current power distribution method inside the energy storage converter booster integrated machine cannot ensure the power supply stability of the system and wastes resources.

[0006] In order to solve the above technical problems, the first aspect of this specification provides an energy storage converter booster integrated machine, including a three-level distribution bus; the energy storage converter booster integrated machine includes: an energy storage converter, used to realize the conversion of AC and DC; the DC side of the energy storage converter is used to connect to the energy storage battery; a main transformer, used to realize the conversion of high voltage level and low voltage level; the low voltage side of the main transformer is connected to the AC side of the energy storage converter; a high voltage cabinet, used to control whether the energy storage converter booster integrated machine is connected to the AC power grid; one end of the high voltage cabinet is connected to the high voltage side of the main transformer, and the other end is connected to the AC power grid; an auxiliary transformer, used to realize the conversion of high voltage level and low voltage level; the high voltage side of the auxiliary transformer is connected to Between the energy storage inverter and the main transformer, the low-voltage side is connected to the first-level distribution bus; the first-level distribution bus supplies power to the non-essential continuously powered equipment in the container of the energy storage battery and / or the energy storage inverter booster; the uninterruptible power supply is powered by the first-level distribution bus, and the output end of the uninterruptible power supply is connected to the second-level distribution bus; the second-level distribution bus supplies power to the equipment that needs to be continuously powered in the container of the energy storage battery and / or the energy storage inverter booster; the third-level distribution bus is connected to the second-level distribution bus or the DC side of the energy storage inverter; the third-level distribution bus supplies power to the control equipment in the container of the energy storage battery and / or the energy storage inverter booster.

[0007] In some embodiments, the working states of the energy storage inverter booster include: a first state, used to enable the AC power grid to charge the energy storage battery; a second state, used to enable the energy storage battery to output electrical energy to the AC power grid; accordingly, the third-level distribution bus is connected to both the second-level distribution bus and the DC side of the energy storage inverter.

[0008] In some embodiments, the energy storage inverter booster also includes: a first automatic transfer switch, whose first input end is connected to the low-voltage side of the auxiliary transformer, and whose second input end is connected to the station power of the first voltage level; the output end of the first automatic transfer switch is connected to the first-level distribution bus.

[0009] In some embodiments, the energy storage inverter booster also includes: a second automatic transfer switch, whose first input end is connected to the first-level distribution bus, and the second input end is connected to the station power of the second voltage level; the output end of the second automatic transfer switch is connected to the input end of the uninterruptible power supply.

[0010] In some embodiments, the energy storage converter booster also includes: a first step-down transformer, whose high voltage side is connected to the second-level distribution bus and whose low voltage side is connected to the third-level distribution bus; the third-level distribution bus is also connected to the DC side of the energy storage converter.

[0011] In some embodiments, the energy storage converter step-up integrated device further includes: a second step-down transformer, whose high voltage side is connected to the DC side of the energy storage converter, and whose low voltage side is connected to the third-level distribution bus.

[0012] In some embodiments, the energy storage converter booster also includes: a diode, whose positive pole is connected to the low-voltage side of the second step-down transformer and whose negative pole is connected to the third-level distribution bus; and the low-voltage side of the first step-down transformer and the low-voltage side of the second step-down transformer have the same voltage level.

[0013] In some embodiments, the energy storage inverter boost integrated machine includes at least two energy storage inverters; the energy storage inverter boost integrated machine also includes: an interlocking switch, the input end of the interlocking switch is connected to the input ends of the at least two energy storage inverters, and the output end of the interlocking switch is connected to the third-level distribution bus.

[0014] In some embodiments, the energy storage inverter boost integrated device includes: multiple current acquisition devices, which are arranged on the DC side and AC side of the energy storage inverter, and between the high-voltage cabinet and the AC power grid; a controller, which is communicated with each current acquisition device and is used to calculate the conversion efficiency of the equipment based on the measurement values ​​of each current acquisition device.

[0015] In some embodiments, the capacity of the auxiliary transformer is one of the following: 80kVA, 100kVA, 120kVA; the capacity of the uninterruptible power supply is one of the following: 3kVA, 6kVA, 10kVA.

[0016] The energy storage converter and booster integrated machine provided in this specification realizes the energy storage battery to output electric energy to the AC power grid or the AC power grid to charge the energy storage battery through the energy storage converter, the main transformer, and the high-voltage cabinet. The auxiliary transformer takes the voltage between the main transformer and the high-voltage cabinet and steps down the voltage to obtain the power supply of the first-level distribution bus. The first-level distribution bus supplies power to the uninterruptible power supply, which is then supplied by the second-level distribution bus. The power supply of the third-level distribution bus is taken from the energy storage battery and the energy storage converter and / or the second-level distribution bus. This solution starts from the entire system of the energy storage and booster integrated machine, adopts a new distribution system, and sets up three-level distribution buses according to the voltage level and the importance of the load. Compared with the prior art in which the energy storage converter, the main transformer, the high-voltage cabinet and other equipment are designed for power distribution separately, this solution not only improves the system power supply reliability, but also reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A structural schematic diagram of an energy storage converter and booster integrated machine provided in this specification;

[0019] Figure 2 A schematic diagram of a working state of an energy storage converter and booster integrated machine;

[0020] Figure 3 It is a schematic diagram of another working state of the energy storage converter booster;

[0021] Figure 4 Another structural schematic diagram of the energy storage converter booster provided in this specification;

[0022] Figure 5 A schematic diagram of a specific implementation of the energy storage converter booster provided in this specification;

[0023] Figure 6 It is a connection diagram between the controller and the current acquisition device. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0025] This specification provides an energy storage converter booster integrated machine, such as Figure 1 As shown, it includes an energy storage converter 10 , a main transformer 20 , a high-voltage cabinet 30 , an auxiliary transformer 40 and an uninterruptible power supply 50 .

[0026] The energy storage converter 10 has a DC side and an AC side for realizing the conversion between AC and DC. The DC side of the energy storage converter 10 is used to connect to the energy storage battery, and the AC side is used to connect to the AC power grid.

[0027] The main transformer 20 is used to achieve conversion between high voltage level and low voltage level. The low voltage side of the main transformer 20 is connected to the AC side of the energy storage converter 10, and the high voltage side is used to connect to the AC power grid.

[0028] The high-voltage cabinet 30 is used to control whether the energy storage converter booster is connected to the AC power grid. One end of the high-voltage cabinet 30 is connected to the high-voltage side of the main transformer 20, and the other end is connected to the AC power grid. For example, the high-voltage cabinet 30 includes a circuit breaker, and whether the energy storage converter booster is connected to the AC power grid can be controlled by controlling the opening and closing of the circuit breaker. The high-voltage cabinet 30 may only include a circuit breaker and its necessary configuration.

[0029] The auxiliary transformer 40 is used to achieve the conversion between high voltage level and low voltage level. The high voltage side of the auxiliary transformer 40 is connected between the energy storage converter 10 and the main transformer 20, and the low voltage side is connected to the first-level distribution bus. The first-level distribution bus supplies power to the container of the energy storage battery and the non-essential continuous power supply equipment in the energy storage converter booster.

[0030] The auxiliary transformer 40 is essentially a step-down transformer, which converts a voltage of the same or similar voltage level as the AC power grid into a power supply voltage level for the equipment.

[0031] Equipment that does not necessarily need to be continuously powered, such as lighting, exhaust, etc. The interruption of such equipment for a period of time will have little impact on the normal operation of the system.

[0032] The uninterruptible power supply 50 is powered by the first-level distribution bus, and the output end of the uninterruptible power supply 50 is connected to the second-level distribution bus, that is, the output of the uninterruptible power supply 50 serves as the second-level distribution bus. The second-level distribution bus supplies power to the equipment that needs continuous power supply in the energy storage battery container and / or the energy storage inverter booster.

[0033] The uninterruptible power supply 50 is an uninterruptible power supply containing an energy storage device, and is mainly used to provide uninterruptible power supply to some equipment that has high requirements for power supply stability. When the first-level distribution bus is powered, the uninterruptible power supply 50 stabilizes the voltage from the first-level distribution bus and supplies it to the load for use. At this time, the uninterruptible power supply 50 is equivalent to an AC voltage stabilizer, and also charges its own internal energy storage device; when the first-level distribution bus is powered off, the uninterruptible power supply 50 immediately inverts the DC power of its own internal energy storage device into AC power using an inverter, and continues to supply power to the load, so that the load maintains normal operation and protects the load software and hardware from damage.

[0034] It should be noted that if the first-level distribution bus is powered off, the uninterruptible power supply 50 can only continue to supply power to the load for a period of time (for example, half an hour). After the power in the internal energy storage device of the uninterruptible power supply 50 is released, the uninterruptible power supply 50 will also stop supplying power to the load.

[0035] The power supply of the third-level distribution bus is connected to the second-level distribution bus or the DC side of the energy storage converter 10. The third-level distribution bus supplies power to the control equipment in the container of the energy storage battery and / or the energy storage converter booster.

[0036] The connection of the power supply of the third-level distribution bus can be determined according to the working status of the energy storage converter booster.

[0037] The energy storage converter and booster can have two working states. The first state is used to enable the AC grid to supply power to the energy storage battery, and the second state is used to enable the energy storage battery to output power to the AC grid.

[0038] In the first state, if Figure 2 As shown, after the voltage of the AC grid passes through the high-voltage cabinet 30, it is stepped down by the main transformer 20, and then the energy storage converter 10 converts the AC power into DC power, which charges the energy storage battery. At the same time, the auxiliary transformer 40 steps down the AC power of the same level as the AC grid to the target level to supply power to the non-essential continuous power supply equipment in the energy storage battery container and the energy storage converter step-up integrated machine.

[0039] In the second state, if Figure 3 As shown, the DC power output by the energy storage battery is converted into AC power by the energy storage converter 10, and then boosted to the voltage level of the AC grid by the main transformer 20, and finally output to the AC grid through the high-voltage cabinet 30. At the same time, the auxiliary transformer 40 steps down the AC power of the same level as the AC grid to the target level to supply power to the non-essential continuous power supply equipment in the energy storage battery container and the energy storage converter booster.

[0040] The energy storage converter booster can only work in the first state or in the second state. The working state of the energy storage converter booster also includes the first state and the second state, that is, the energy storage converter works in the first state for a period of time and in the second state for another period of time.

[0041] When switching between the first state and the second state, the first-level distribution busbar will be powered off for a period of time. Therefore, it is more appropriate to use the first-level distribution busbar to supply power to equipment that does not necessarily require continuous power supply.

[0042] The first-level distribution bus supplies power to the uninterruptible power supply 50, and the second-level distribution bus is connected to the uninterruptible power supply 50. This setting method allows the second-level distribution bus to remain powered during the state switching of the energy storage inverter booster. Therefore, the second-level distribution target is suitable for powering equipment that requires continuous power supply in containers of energy storage batteries and energy storage inverter boosters.

[0043] In some embodiments, Figure 4 As shown, the working state of the energy storage converter booster includes the first state and the second state mentioned above. In this case, the third-level distribution bus is connected to both the second-level distribution bus and the DC side of the energy storage converter 10.

[0044] At the start time of the first state, after the high-voltage cabinet 30 connects the energy storage converter booster to the AC power grid, the first-level distribution bus is energized, and thus the second-level distribution bus is also energized. Since the third-level distribution bus is connected to the second-level distribution bus, the third-level distribution bus is also energized, and then the container of the energy storage battery and the various control devices in the energy storage converter booster are energized, so that the main transformer 20 and the energy storage converter 10 can be controlled to work normally. Only after these devices work normally can the energy storage battery be charged.

[0045] At the start time of the second state, since the energy storage battery is connected to the third-level distribution bus, the third-level distribution bus is powered, and then the energy storage battery container and the various control devices in the energy storage converter booster are powered, so that the main transformer 20 and the energy storage converter 10 can be controlled to work normally. After these devices work normally, the electric energy output by the energy storage battery can be normally converted into the same voltage level as the AC power grid. After that, the first-level distribution bus can be powered, and thus the second-level distribution bus can also be powered, so that the energy storage battery container and the various control devices in the energy storage converter booster can be powered normally.

[0046] The first-level distribution busbar can be 380V, the second-level distribution busbar can be 220V, and the third-level distribution busbar can be 24V. Accordingly, the voltage level between the main transformer 20 and the high-voltage cabinet 30 can be 690V. The auxiliary transformer 40 is essentially a step-down transformer, which converts the voltage level of 690V to the voltage level of 380V. The capacity of the auxiliary transformer 40 can be selected from 80kVA, 100kVA, and 120kVA.

[0047] In some embodiments, Figure 4 As shown, the energy storage converter step-up integrated machine also includes a first automatic transfer switch 60, whose first input end is connected to the low voltage side of the auxiliary transformer 40, and whose second input end is connected to the station point of the first voltage level. The output end of the first automatic transfer switch 60 is connected to the first-level distribution bus.

[0048] In some embodiments, Figure 4 As shown, the energy storage converter step-up integrated device also includes a second automatic transfer switch 70, whose first input end is connected to the first-level distribution bus, and the second input end is connected to the station power of the second voltage level. The output end of the second automatic transfer switch 70 is connected to the input end of the uninterruptible power supply 50.

[0049] The automatic transfer switch is composed of one (or several) transfer switch appliances and other necessary appliances, and is used to monitor the power circuit and automatically transfer one or several load circuits from one power source to another. In the electrical industry, it is referred to as a "dual power automatic transfer switch" or "dual power switch". The first automatic transfer switch 60 and the second automatic transfer switch 70 are two automatic transfer switches.

[0050] Station power refers to the power provided by the outside of the energy storage converter booster. Station power is not affected by the internal operating state of the energy storage converter booster. By automatically switching the station power as a backup power source, the reliability of power supply can be improved.

[0051] In some embodiments, the voltage levels of the second-level distribution bus and the third distribution bus are different. Specifically, the voltage level of the third distribution bus is lower than the voltage level of the second-level distribution bus. Accordingly, the energy storage converter step-up integrated machine also includes a first step-down transformer 80, whose high-voltage side is connected to the second-level distribution bus and whose low-voltage side is connected to the third distribution bus. The third distribution bus is also connected to the DC side of the energy storage converter 10.

[0052] Furthermore, the energy storage converter booster unit also includes a second step-down transformer 90, whose high voltage side is connected to the DC side of the energy storage converter 10, and whose low voltage side is connected to the third-level distribution bus. The output voltage of the energy storage battery can be stabilized to the voltage level of the third-level distribution bus through the second step-down transformer, thereby ensuring the stability and accuracy of the power supply voltage level of each control device.

[0053] Furthermore, the energy storage converter booster also includes a diode 100, whose positive pole is connected to the low-voltage side of the second step-down transformer and whose negative pole is connected to the third distribution bus; and the low-voltage side of the first step-down transformer 80 and the low-voltage side of the second step-down transformer 90 have the same voltage level.

[0054] Since the voltage level of the low-voltage side of the first step-down transformer 80 is the same as that of the low-voltage side of the second step-down transformer 90, when the second-level distribution bus is powered, the voltage difference across the diode 100 is very small and cannot reach the conduction voltage threshold of the diode 100, so it will not be turned on, thereby preventing the current of the third-level distribution bus from flowing back toward the energy storage battery. When the second-level distribution bus is not powered, the third-level distribution bus exhibits a low voltage feature due to the connection of the control device load, which makes the voltage difference across the diode 100 reach the conduction voltage threshold of the diode 100, so that the energy storage battery can supply power to the third-level distribution bus.

[0055] In some embodiments, the energy storage converter booster includes at least two energy storage converters 10. The energy storage converter booster also includes an interlocking switch 110, the input end of the interlocking switch 110 is connected to the input ends of at least two energy storage converters 10, and the output end of the interlocking switch 110 is connected to the third-level distribution bus.

[0056] Each of the multiple input ends of the interlock switch forms a current flow channel to the output end. The interlock switch is designed with a special internal mechanical structure so that only one current flow channel of the interlock switch is always turned on. In other words, through the setting of the interlock switch, only one of the two output ends of the energy storage battery (or the input ends of the two energy storage converters 10) supplies power to the third-level distribution bus, thereby improving the power supply reliability of the third-level distribution bus.

[0057] In some embodiments, the energy storage converter and boost integrated device further includes a plurality of current collection devices 120 and a controller 130 .

[0058] These current collection devices 120 are arranged on the DC side and AC side of the energy storage converter 10, and between the high-voltage cabinet 30 and the AC power grid. The current collection device includes a DC current collection device and an AC current collection device.

[0059] The controller 130 is in communication with each current acquisition device 120 and is used to calculate the conversion efficiency of the device according to the measurement value of each current acquisition device 120. Figure 6 shown.

[0060] Combine the following Figure 5 A specific implementation example is shown to illustrate the energy storage converter booster provided in this specification. Figure 5 In the figure, PCS corresponds to the energy storage converter 10, transformer T1 corresponds to the main transformer 20, transformer T2 corresponds to the auxiliary transformer 40, UPS corresponds to the uninterruptible power supply 50, ATS1 corresponds to the first automatic transfer switch 60, ATS2 corresponds to the second automatic transfer switch 70, the 24V power supply 3 between the second-level distribution bus and the third-level distribution bus corresponds to the first step-down transformer 80, the 24V power supply 1 and 24V power supply 2 connected to the output end of the energy storage battery correspond to the second step-down transformer 90, the diode V1 corresponds to the diode 100, and the interlocking switch KM1 corresponds to the interlocking switch 110. The DC current sensors TA1 to TA4 correspond to the DC current acquisition device, and the current transformer groups TA5 to TA9 correspond to the AC current acquisition device.

[0061] The following is attached Figure 5 Elaborate in detail.

[0062] 1. The first level of power distribution (380V): The knife switch Q1 is connected to the 690V copper busbar output by the PCS. The transformer T2 steps down the 690V to 380V. The two inputs of ATS1 are the outputs of the transformer T2, and they are connected to the external 380V station power supply.

[0063] The output of ATS1 is the first distribution bus. The loads connected to the first distribution bus include QF2 (1# battery container power supply), QF3 (2# battery container power supply), QF4 (energy storage and booster integrated cabin power supply), QF5 (power supply for power communication cabinet), and QF6 (reserved).

[0064] 2. Second-level power distribution (220V): The two inputs of ATS2 are the A-phase power supply of the first distribution bus, which is connected to the external 220V station power supply. The output of ATS2 is connected to the UPS power supply, and the UPS output is connected to the secondary distribution bus through the QF8 switch. The loads connected to the second distribution bus are QF9 (1# battery compartment control power supply), QF10 (2# battery compartment control power supply), QF11 (boost transformer temperature controller power supply), QF12 (high-voltage cabinet power supply), QF13 (box transformer measurement and control power supply), QF14 (electricity meter power supply), QF15 (fire protection power supply), QF16 (access control power supply), QF17 (maintenance socket power supply), and QF18 (reserved).

[0065] 3. Third-level power distribution (24V): 24V power supplies 1 and 2 are DC switching power supplies, and their inputs are connected to the DC positive and negative copper bars of 1#PCS and 2#PCS respectively. Their outputs are connected in parallel with the output of 24V power supply 3 through KM1 contactor and diode V1. 24V power supply 3 is an AC power supply, and its input is connected to the secondary distribution bus. 24V is connected to the third-level distribution bus through QF19. The loads connected to the third-level distribution bus include QF20 (1#PCS control power supply), QF21 (2#PCS control power supply), QF22 (local controller power supply), QF23 (switch power supply), and QF24 (reserved).

[0066] The power supply and control power supply of the battery container are provided by the primary and secondary distribution busbars of the energy storage and booster integrated distribution system, eliminating the UPS and corresponding ATS in the battery compartment and reducing the cost and size of the junction cabinet.

[0067] The control power supply of the two PCSs is provided by the three-level distribution busbar of the energy storage and booster integrated distribution system, which eliminates the DC switching power supply and auxiliary transformer in the PCS, reduces the PCS cost and the size of the PCS cabinet. At the same time, the internal heat of the PCS is reduced. When the AC and DC power are cut off at the same time, the three-level distribution busbar can also be powered by the UPS, which improves the reliability of the PCS power supply and facilitates on-site debugging.

[0068] TA1 to TA4 are DC current sensors, and TA5 to TA9 are current transformers. TA1 to TA9 are connected to meters 1 to 9. Meters 1 to 4 are DC meters, and meters 5 to 9 are AC meters. The power measured by meters 1 to 9 is P1 to P9. The total auxiliary power Pa = P3 + P4 + P7 + P8 + P9.

[0069] When the energy storage system is discharged: the conversion efficiency of the two PCS

[0070] Transformer T1 conversion efficiency

[0071] Boost converter conversion efficiency

[0072] When the energy storage system is charging: the conversion efficiency of the two PCS

[0073] Transformer T1 conversion efficiency

[0074] Boost converter conversion efficiency

[0075] The controller can calculate the auxiliary power consumption and the conversion efficiency of each part of the energy storage and boost unit in real time.

[0076] By setting up a controller and various current collection devices, the energy storage converter booster can monitor the power supply of each system in real time and calculate the conversion efficiency of each part, so as to detect abnormal operation in time.

[0077] Although the present application has been described through embodiments, those skilled in the art will appreciate that there are many modifications and variations to the present application without departing from the spirit of the present application, and it is intended that the appended claims include these modifications and variations without departing from the spirit of the present application.

Claims

1. An energy storage converter and booster integrated machine, characterized in that: It includes a three-level distribution bus; the energy storage converter booster integrated machine includes: An energy storage converter is used to realize the conversion between AC and DC; the DC side of the energy storage converter is used to connect to the energy storage battery; A main transformer, used to achieve conversion between high voltage level and low voltage level; the low voltage side of the main transformer is connected to the AC side of the energy storage converter; A high-voltage cabinet, used to control whether the energy storage converter booster is connected to the AC power grid; one end of the high-voltage cabinet is connected to the high-voltage side of the main transformer, and the other end is connected to the AC power grid; An auxiliary transformer is used to realize the conversion between high voltage level and low voltage level; the high voltage side of the auxiliary transformer is connected between the energy storage converter and the main transformer, and the low voltage side is connected to the first-level distribution bus; the first-level distribution bus supplies power to the non-essential continuous power supply equipment in the container of the energy storage battery and / or the energy storage converter booster; An uninterruptible power supply is powered by a first-level distribution bus, and the output end of the uninterruptible power supply is connected to a second-level distribution bus; the second-level distribution bus supplies power to the equipment that needs continuous power supply in the container of the energy storage battery and / or the energy storage converter booster; The third-level distribution bus is connected to the second-level distribution bus or the DC side of the energy storage converter; the third-level distribution bus supplies power to the control equipment in the container of the energy storage battery and / or the energy storage converter booster.

2. The energy storage converter and boost integrated device according to claim 1, characterized in that: The working state of the energy storage converter booster unit includes: The first state is used to enable the AC grid to charge the energy storage battery; The second state is used to enable the energy storage battery to output electric energy to the AC power grid; Correspondingly, the third-level distribution bus is connected to both the second-level distribution bus and the DC side of the energy storage converter.

3. The energy storage converter and boost integrated device according to claim 1, characterized in that: Also includes: a first automatic transfer switch, a first input end of which is connected to the low voltage side of the auxiliary transformer, and a second input end of which is connected to the station power of the first voltage level; The output end of the first automatic transfer switch is connected to the first-level power distribution bus.

4. The energy storage converter and boost integrated device according to claim 1, characterized in that: Also includes: a second automatic transfer switch, a first input end of which is connected to the first-level distribution bus, and a second input end of which is connected to the station power of the second voltage level; The output end of the second automatic transfer switch is connected to the input end of the uninterruptible power supply.

5. The energy storage converter and boost integrated device according to claim 1, characterized in that: Also includes: a first step-down transformer, a high-voltage side of which is connected to the second-level distribution bus, and a low-voltage side of which is connected to the third-level distribution bus; The third-level distribution bus is also connected to the DC side of the energy storage converter.

6. The energy storage converter and boost integrated device according to claim 5, characterized in that: Also includes: The second step-down transformer has a high voltage side connected to the DC side of the energy storage converter, and a low voltage side connected to the third-level distribution bus.

7. The energy storage converter and boost integrated device according to claim 6, characterized in that: Also includes: a diode, the positive electrode of which is connected to the low voltage side of the second step-down transformer, and the negative electrode of which is connected to the third-level power distribution bus; Furthermore, the voltage levels of the low-voltage side of the first step-down transformer and the low-voltage side of the second step-down transformer are the same.

8. The energy storage converter and boost integrated device according to claim 4, characterized in that: The energy storage converter boost integrated machine includes at least two energy storage converters; the energy storage converter boost integrated machine also includes: An interlocking switch, wherein an input end of the interlocking switch is connected to input ends of the at least two energy storage converters, and an output end of the interlocking switch is connected to the third-level power distribution bus.

9. The energy storage converter and boost integrated device according to claim 1, characterized in that: Also includes: A plurality of current collection devices are arranged on the DC side and the AC side of the energy storage converter, and between the high-voltage cabinet and the AC power grid; The controller is connected to each current collection device for calculating the conversion efficiency of the device according to the measurement value of each current collection device.

10. The energy storage converter and boost integrated device according to claim 1, characterized in that: The capacity of the auxiliary transformer is one of the following: 80kVA, 100kVA, 120kVA; The capacity of the uninterruptible power supply is one of the following: 3kVA, 6kVA, 10kVA.

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