Secondary system of energy storage transformer

Abstract

This application relates to the field of energy storage transformer substation technology. Specifically, an embodiment discloses a secondary system for an energy storage transformer substation, comprising: an input terminal of an auxiliary transformer T01 connected to the transformer substation; an output terminal of the auxiliary transformer T01 connected to the first input terminal of a dual power switching device (ATS) and the input terminal of the energy storage container's power supply; a second input terminal of the dual power switching device (ATS) connected to the client-side energy storage power supply; and an output terminal of the dual power switching device (ATS) connected to the internal power input terminal of the energy storage container's UPS power supply, the power input terminal of the transformer substation's high-voltage compartment, the power input terminal of the transformer substation's temperature controller, the power input terminal of the transformer substation's transformer compartment, and the power input terminal of the transformer substation's low-voltage compartment; and an internal power output terminal of the energy storage container's UPS power supply connected to the power input terminal of the low-voltage side switch control, the power input terminal of the high-voltage side switch control, the power input terminal of the transformer substation's electrical interlock, the power input terminal of the measurement and control device, and the power input terminal of the switch.

Description

Technical Field

[0001] This application relates to the field of energy storage transformer substation technology, specifically to a secondary system for an energy storage transformer substation. Background Technology

[0002] In energy storage power station systems, prefabricated substations (PGS) serve as key nodes connecting energy storage battery units to the power grid, undertaking core functions such as voltage transformation, power distribution, and protection control. The reliability and independence of their secondary systems (control, protection, monitoring, and auxiliary power systems) are crucial for the safe and stable operation of the entire energy storage power station.

[0003] Therefore, there is an urgent need for a secondary system power supply solution specifically designed for energy storage transformer substations, which can seamlessly switch to a reliable backup power supply when the main power supply fails, and ensure continuous and stable power supply to the entire secondary system (including core control and all necessary auxiliary equipment), significantly improving the system's availability, security and intelligence level. Summary of the Invention

[0004] The purpose of this application is to provide a secondary system for energy storage transformer substations to solve the problems in the prior art.

[0005] To achieve the above objectives, this application provides a secondary system for an energy storage transformer substation, comprising: an auxiliary transformer T01, a dual power supply switching device (ATS), and an energy storage box UPS power supply, wherein...

[0006] The input terminal of the auxiliary transformer T01 is connected to the transformer of the box-type substation, and the output terminal of the auxiliary transformer T01 is connected to the first input terminal of the dual power switching device ATS and the input terminal of the power supply of the energy storage container, respectively.

[0007] The second input terminal of the dual power switching device ATS is connected to the client's energy storage power supply, and the output terminal of the dual power switching device ATS is connected to the internal power input terminal of the energy storage box UPS power supply, the power input terminal of the high-voltage compartment of the transformer substation, the power input terminal of the transformer temperature controller of the transformer substation, the power input terminal of the transformer compartment of the transformer substation, and the power input terminal of the low-voltage compartment of the transformer substation, respectively.

[0008] The internal power output terminals of the UPS power supply in the energy storage box are respectively connected to the low-voltage side switch control power input terminal, the high-voltage side switch control power input terminal, the transformer electrical interlock power input terminal, the measurement and control device power input terminal, and the switch power input terminal.

[0009] Optionally, the power output terminal of the transformer substation high-voltage compartment is connected to the power input terminal of the lighting lamp EA11 via a limit switch BG12. The power output terminal of the transformer substation high-voltage compartment is also connected to the power input terminal of the temperature and humidity controller BZ11. The temperature and humidity controller BZ11 is connected to the temperature sensor B011. The neutral wire of the power output terminal of the transformer substation high-voltage compartment is also connected to one end of the heater EB11. The other end of the heater EB11 is connected to the temperature and humidity controller BZ11.

[0010] Optionally, the output terminal of the power supply of the transformer temperature controller is connected to the power input terminal of the transformer temperature controller ST, and the output terminal of the transformer temperature controller ST is connected to temperature sensor B001, temperature sensor B002, and temperature sensor B003 respectively.

[0011] The output terminal of the power supply of the transformer temperature controller is also connected to the power input terminal of the transformer cooling fan via AC contactor K021.

[0012] Optionally, the output terminal of the transformer compartment power supply is connected to the power input terminal of the temperature and humidity controller BZ22, and the output terminal of the temperature and humidity controller BZ22 is connected to the temperature and humidity sensor B021 and the temperature and humidity sensor B022.

[0013] The output terminal of the transformer compartment power supply is also connected to the power input terminal of the transformer compartment cooling fan via AC contactor K022;

[0014] The output terminal of the transformer compartment power supply is also connected to the power input terminals of lighting lamps EA21, EA22, and EA23 via limit switches BG21 and BG22.

[0015] Optionally, the output terminal of the power supply of the low-pressure compartment of the transformer substation is connected to the power input terminal of the lighting lamp EA31 through the limit switch BG32. The output terminal of the power supply of the low-pressure compartment of the transformer substation is also connected to the power input terminal of the temperature and humidity controller BZ31. The output terminal of the temperature and humidity controller BZ31 is connected to the temperature and humidity sensor B031.

[0016] The output terminal of the power supply for the low-pressure compartment of the transformer substation is also connected to the input terminal of the switching power supply T11. The output terminal of the switching power supply T11 is connected to the power input terminals of the smoke sensor PB11, the smoke sensor PB21, the fan EC31, and the fan EC32, respectively.

[0017] A relay K031 is provided between the power input terminal of the fan EC31 and the output terminal of the switching power supply T11, and a relay K041 is provided between the power input terminal of the fan EC32 and the output terminal of the switching power supply T11.

[0018] The output terminal of the power supply for the low-pressure compartment of the transformer substation is also connected to the maintenance socket XD01.

[0019] The output terminal of the power supply of the low-pressure compartment of the transformer substation is also connected to the power input terminal of the temperature and humidity controller BZ41 through the relay K041, and the output terminal of the temperature and humidity controller BZ41 is connected to the temperature and humidity controller B041.

[0020] Optionally, a circuit breaker F101 is provided between the input terminal of the auxiliary transformer T01 and the transformer box;

[0021] A circuit breaker F102 is provided between the output terminal of the auxiliary transformer T01 and the first input terminal of the dual power supply switching device ATS;

[0022] The output terminal of the dual power supply switching device ATS is connected to a circuit breaker F103.

[0023] A circuit breaker F108 is provided between the output terminal of the circuit breaker F103 and the internal power input terminal of the UPS power supply of the energy storage box.

[0024] Circuit breakers F104, F105, F106, and F107 are respectively installed between the output terminal of circuit breaker F103 and the power input terminal of the high-voltage compartment of the transformer substation, the power input terminal of the transformer temperature controller of the transformer substation, the power input terminal of the transformer compartment of the transformer substation, and the power input terminal of the low-voltage compartment of the transformer substation.

[0025] Optionally, the internal power output terminal of the UPS power supply in the energy storage box is connected to a circuit breaker F109;

[0026] Circuit breakers F114, F113, F112, F111, and F110 are respectively installed between the output terminal of circuit breaker F109 and the low-voltage side switch control power input terminal, the high-voltage side switch control power input terminal, the transformer substation electrical interlock power input terminal, the measurement and control device power input terminal, and the switch power input terminal.

[0027] Optionally, the second input terminal of the dual power supply switching device ATS is connected to a surge protector FA01.

[0028] The embodiments of this application have the following advantages:

[0029] Compared with existing technologies, the energy storage transformer secondary system provided by the above technical solution, through its innovative dual-power architecture and systematic design, effectively solves the problems of low power reliability and insufficient coverage of traditional solutions, and has the following significant beneficial effects:

[0030] High reliability with seamless dual power supply switching:

[0031] An auxiliary transformer (T01) is installed, drawing power from the transformer within the transformer substation as the primary power source. A dual power switching system (ATS) is also installed, with its second input connected to the client-side energy storage power source (such as the energy storage unit's own DC system via an inverter or reliable station power from the energy storage power station) as a highly reliable backup power source. When the primary power source (auxiliary transformer output) fails or loses power, the ATS can automatically, quickly, and seamlessly switch to the backup power source (client-side energy storage power source), ensuring the continuity of power supply to the entire transformer substation's secondary system and preventing system paralysis due to a single power source failure. This is particularly suitable for energy storage applications with extremely high power reliability requirements.

[0032] Enhance the reliability of the core control power supply:

[0033] The UPS power supply in the energy storage box receives stable input power from the ATS to charge its internal battery, and provides highly reliable UPS power with backup time to the most critical control, protection and communication equipment such as low-voltage side switch control power supply, high-voltage side switch control power supply, transformer electrical interlock power supply, measurement and control device power supply, and switch power supply. Even if there is a momentary interruption during ATS switching or both input power supplies experience extreme failures, the UPS can immediately start to provide uninterrupted power supply to the core equipment, ensuring that switching operation, protection action and communication are not interrupted.

[0034] Enhance environmental control and equipment safety:

[0035] By providing reliable power to the temperature and humidity controllers, temperature sensors, heaters, and cooling fans in each compartment (high-voltage compartment, transformer compartment, and low-pressure compartment), the internal environment of the transformer substation is always kept in a suitable state, effectively preventing condensation and overheating, significantly extending the service life of major equipment such as transformers and switchgear, reducing the failure rate, and ensuring the normal operation of smoke sensors and improving the early warning capability of fire.

[0036] Multiple electrical protections:

[0037] The system is equipped with multi-level circuit breakers (F101-F114) at key nodes (input, output, and branch circuits) to provide comprehensive overload and short-circuit protection, ensuring safe system operation. The surge protector (FA01) effectively suppresses surge overvoltages introduced from the customer's energy storage power supply side, protecting downstream equipment. Attached Figure Description

[0038] To more clearly illustrate the embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0039] Figure 1 A circuit diagram of a secondary system for an energy storage transformer substation is provided for at least one embodiment of this application;

[0040] Figure 2 A circuit diagram of the power supply for the high-voltage compartment of a transformer substation secondary system provided in at least one embodiment of this application;

[0041] Figure 3 A circuit diagram of the power supply for the transformer temperature controller of a secondary system of an energy storage transformer substation, provided for at least one embodiment of this application;

[0042] Figure 4 A circuit diagram of the power supply for the transformer compartment of an energy storage transformer substation secondary system provided for at least one embodiment of this application;

[0043] Figure 5 The circuit diagram of the power supply for the low-pressure compartment of the energy storage transformer substation secondary system provided in at least one embodiment of this application. Detailed Implementation

[0044] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0046] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0047] This application provides an energy storage transformer substation secondary system, referencing... Figures 1 to 5 This includes: auxiliary transformer T01, dual power switching device ATS, and energy storage box UPS power supply.

[0048] The input terminal of the auxiliary transformer T01 is connected to the transformer of the box-type substation, and the output terminal of the auxiliary transformer T01 is connected to the first input terminal of the dual power switching device ATS and the input terminal of the power supply of the energy storage container, respectively.

[0049] The second input terminal of the dual power switching device ATS is connected to the client's energy storage power supply, and the output terminal of the dual power switching device ATS is connected to the internal power input terminal of the energy storage box UPS power supply, the power input terminal of the high-voltage compartment of the transformer substation, the power input terminal of the transformer temperature controller of the transformer substation, the power input terminal of the transformer compartment of the transformer substation, and the power input terminal of the low-voltage compartment of the transformer substation, respectively.

[0050] The internal power output terminals of the UPS power supply in the energy storage box are respectively connected to the low-voltage side switch control power input terminal, the high-voltage side switch control power input terminal, the transformer electrical interlock power input terminal, the measurement and control device power input terminal, and the switch power input terminal.

[0051] Specifically, the auxiliary transformer T01 is installed inside the transformer compartment of the transformer substation.

[0052] refer to Figure 2 In some embodiments, the power output terminal of the transformer substation high-voltage compartment is connected to the power input terminal of the lighting lamp EA11 via a limit switch BG12. The power output terminal of the transformer substation high-voltage compartment is also connected to the power input terminal of the temperature and humidity controller BZ11. The temperature and humidity controller BZ11 is connected to the temperature sensor B011. The neutral wire of the power output terminal of the transformer substation high-voltage compartment is also connected to one end of the heater EB11. The other end of the heater EB11 is connected to the temperature and humidity controller BZ11.

[0053] Specifically, the limit switch BG12 is installed inside the transformer compartment door of the transformer substation, the lighting EA11 is installed on the upper side of the high-voltage compartment side wall of the transformer substation, the temperature and humidity controller BZ11 is installed on the inner door panel of the high-voltage compartment of the transformer substation, the temperature sensor B011 is installed at the external cable inlet of the high-voltage compartment of the transformer substation, and the heater EB11 is installed at the external cable inlet of the high-voltage compartment of the transformer substation.

[0054] refer to Figure 3 In some embodiments, the output terminal of the power supply of the transformer temperature controller is connected to the power input terminal of the transformer temperature controller ST, and the output terminal of the transformer temperature controller ST is connected to temperature sensor B001, temperature sensor B002, and temperature sensor B003 respectively.

[0055] The output terminal of the power supply of the transformer temperature controller is also connected to the power input terminal of the transformer cooling fan via AC contactor K021.

[0056] Specifically, the temperature controller ST of the transformer substation is installed on the control cabinet door panel, and temperature sensors B001, B002, and B003 are installed in the A-phase, B-phase, and C-phase windings of the transformer substation, respectively.

[0057] refer to Figure 4 In some embodiments, the output terminal of the transformer compartment power supply is connected to the power input terminal of the temperature and humidity controller BZ22, and the output terminal of the temperature and humidity controller BZ22 is connected to the temperature and humidity sensor B021 and the temperature and humidity sensor B022.

[0058] The output terminal of the transformer compartment power supply is also connected to the power input terminal of the transformer compartment cooling fan via AC contactor K022;

[0059] The output terminal of the transformer compartment power supply is also connected to the power input terminals of lighting lamps EA21, EA22, and EA23 via limit switches BG21 and BG22.

[0060] Specifically, the temperature and humidity controller BZ22 is installed on the control cabinet door panel of the transformer substation, the humidity sensor B021 and the temperature and humidity sensor B022 are installed on the side wall of the transformer compartment, the transformer compartment cooling fan is installed on the side wall of the transformer compartment, the limit switches BG21 and BG22 are installed on the inside of the transformer compartment door, and the lighting lamps EA21, EA22, and EA23 are installed on the upper side of the transformer compartment side wall.

[0061] refer to Figure 5 In some embodiments, the output terminal of the power supply of the low-pressure compartment of the transformer substation is connected to the power input terminal of the lighting lamp EA31 through the limit switch BG32. The output terminal of the power supply of the low-pressure compartment of the transformer substation is also connected to the power input terminal of the temperature and humidity controller BZ31. The output terminal of the temperature and humidity controller BZ31 is connected to the temperature and humidity sensor B031.

[0062] The output terminal of the power supply for the low-pressure compartment of the transformer substation is also connected to the input terminal of the switching power supply T11. The output terminal of the switching power supply T11 is connected to the power input terminals of the smoke sensor PB11, the smoke sensor PB21, the fan EC31, and the fan EC32, respectively.

[0063] A relay K031 is provided between the power input terminal of the fan EC31 and the output terminal of the switching power supply T11, and a relay K041 is provided between the power input terminal of the fan EC32 and the output terminal of the switching power supply T11.

[0064] The output terminal of the power supply for the low-pressure compartment of the transformer substation is also connected to the maintenance socket XD01.

[0065] The output terminal of the power supply of the low-pressure compartment of the transformer substation is also connected to the power input terminal of the temperature and humidity controller BZ41 through the relay K041, and the output terminal of the temperature and humidity controller BZ41 is connected to the temperature and humidity controller B041.

[0066] Specifically, the temperature and humidity controller BZ31 is installed on the cabinet door panel of the transformer substation control cabinet, the smoke sensor PB11 and the smoke sensor PB21 are respectively installed on the upper side of the high-voltage compartment and the upper side of the transformer compartment of the transformer substation, and the fan EC31 and the fan EC32 are respectively installed on the upper side of the transformer substation control cabinet in the low-voltage compartment and on the side of the auxiliary transformer in the transformer compartment of the transformer substation.

[0067] In some embodiments, a circuit breaker F101 is provided between the input terminal of the auxiliary transformer T01 and the transformer box;

[0068] A circuit breaker F102 is provided between the output terminal of the auxiliary transformer T01 and the first input terminal of the dual power supply switching device ATS;

[0069] The output terminal of the dual power supply switching device ATS is connected to a circuit breaker F103.

[0070] A circuit breaker F108 is provided between the output terminal of the circuit breaker F103 and the internal power input terminal of the UPS power supply of the energy storage box.

[0071] Circuit breakers F104, F105, F106, and F107 are respectively installed between the output terminal of circuit breaker F103 and the power input terminal of the high-voltage compartment of the transformer substation, the power input terminal of the transformer temperature controller of the transformer substation, the power input terminal of the transformer compartment of the transformer substation, and the power input terminal of the low-voltage compartment of the transformer substation.

[0072] In some embodiments, the internal power output terminal of the UPS power supply in the energy storage box is connected to a circuit breaker F109;

[0073] Circuit breakers F114, F113, F112, F111, and F110 are respectively installed between the output terminal of circuit breaker F109 and the low-voltage side switch control power input terminal, the high-voltage side switch control power input terminal, the transformer substation electrical interlock power input terminal, the measurement and control device power input terminal, and the switch power input terminal.

[0074] In some embodiments, the second input terminal of the dual power supply switching device ATS is connected to a surge protector FA01.

[0075] Note that, unless otherwise explicitly stated, all features disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by alternative features for achieving the same, equivalent, or similar purpose. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features. Where used, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments, the combination of which with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment constitutes yet another embodiment.

[0076] In the implementation of functions and steps, the corresponding functions and steps in the various embodiments may occur in a different order than those shown. For example, two consecutive functions and steps may actually be executed or implemented substantially in parallel, and they may sometimes be executed or implemented in reverse order, depending on the functions involved.

[0077] Although this application has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this application fall within the scope of protection claimed in this application.

Claims

1. An energy storage tank variable secondary system, characterized by, include: Auxiliary transformer T01, dual power supply switching device ATS, and energy storage box UPS power supply, among which, The input terminal of the auxiliary transformer T01 is connected to the transformer of the box-type substation, and the output terminal of the auxiliary transformer T01 is connected to the first input terminal of the dual power switching device ATS and the input terminal of the power supply of the energy storage container, respectively. The second input terminal of the dual power switching device ATS is connected to the client's energy storage power supply, and the output terminal of the dual power switching device ATS is connected to the internal power input terminal of the energy storage box UPS power supply, the power input terminal of the high-voltage compartment of the transformer substation, the power input terminal of the transformer temperature controller of the transformer substation, the power input terminal of the transformer compartment of the transformer substation, and the power input terminal of the low-voltage compartment of the transformer substation, respectively. The internal power output terminals of the UPS power supply in the energy storage box are respectively connected to the low-voltage side switch control power input terminal, the high-voltage side switch control power input terminal, the transformer electrical interlock power input terminal, the measurement and control device power input terminal, and the switch power input terminal.

2. The energy storage transformer secondary system according to claim 1, characterized in that, The power output terminal of the transformer substation high-voltage compartment is connected to the power input terminal of the lighting lamp EA11 via limit switch BG12. The power output terminal of the transformer substation high-voltage compartment is also connected to the power input terminal of the temperature and humidity controller BZ11. The temperature and humidity controller BZ11 is connected to the temperature sensor B011. The neutral wire of the power output terminal of the transformer substation high-voltage compartment is also connected to one end of the heater EB11. The other end of the heater EB11 is connected to the temperature and humidity controller BZ11.

3. The energy storage transformer secondary system according to claim 1, characterized in that, The output terminal of the power supply of the transformer temperature controller is connected to the power input terminal of the transformer temperature controller ST. The output terminal of the transformer temperature controller ST is connected to temperature sensor B001, temperature sensor B002, and temperature sensor B003 respectively. The output terminal of the power supply of the transformer temperature controller is also connected to the power input terminal of the transformer cooling fan via AC contactor K021.

4. The energy storage transformer secondary system according to claim 1, characterized in that, The output terminal of the transformer compartment power supply is connected to the power input terminal of the temperature and humidity controller BZ22, and the output terminal of the temperature and humidity controller BZ22 is connected to the temperature and humidity sensor B021 and temperature and humidity sensor B022. The output terminal of the transformer compartment power supply is also connected to the power input terminal of the transformer compartment cooling fan via AC contactor K022; The output terminal of the transformer compartment power supply is also connected to the power input terminals of lighting lamps EA21, EA22, and EA23 via limit switches BG21 and BG22.

5. The energy storage transformer secondary system according to claim 1, characterized in that, The output terminal of the power supply of the low-pressure compartment of the transformer substation is connected to the power input terminal of the lighting lamp EA31 through the limit switch BG32. The output terminal of the power supply of the low-pressure compartment of the transformer substation is also connected to the power input terminal of the temperature and humidity controller BZ31. The output terminal of the temperature and humidity controller BZ31 is connected to the temperature and humidity sensor B031. The output terminal of the power supply for the low-pressure compartment of the transformer substation is also connected to the input terminal of the switching power supply T11. The output terminal of the switching power supply T11 is connected to the power input terminals of the smoke sensor PB11, the smoke sensor PB21, the fan EC31, and the fan EC32, respectively. A relay K031 is provided between the power input terminal of the fan EC31 and the output terminal of the switching power supply T11, and a relay K041 is provided between the power input terminal of the fan EC32 and the output terminal of the switching power supply T11. The output terminal of the power supply for the low-pressure compartment of the transformer substation is also connected to the maintenance socket XD01. The output terminal of the power supply of the low-pressure compartment of the transformer substation is also connected to the power input terminal of the temperature and humidity controller BZ41 through the relay K041, and the output terminal of the temperature and humidity controller BZ41 is connected to the temperature and humidity controller B041.

6. The energy storage transformer secondary system according to claim 1, characterized in that, A circuit breaker F101 is provided between the input terminal of the auxiliary transformer T01 and the transformer box; A circuit breaker F102 is provided between the output terminal of the auxiliary transformer T01 and the first input terminal of the dual power supply switching device ATS; The output terminal of the dual power supply switching device ATS is connected to a circuit breaker F103. A circuit breaker F108 is provided between the output terminal of the circuit breaker F103 and the internal power input terminal of the UPS power supply of the energy storage box. Circuit breakers F104, F105, F106, and F107 are respectively installed between the output terminal of circuit breaker F103 and the power input terminal of the high-voltage compartment of the transformer substation, the power input terminal of the transformer temperature controller of the transformer substation, the power input terminal of the transformer compartment of the transformer substation, and the power input terminal of the low-voltage compartment of the transformer substation.

7. The energy storage transformer secondary system according to claim 6, characterized in that, The internal power output terminal of the UPS power supply in the energy storage box is connected to a circuit breaker F109. Circuit breakers F114, F113, F112, F111, and F110 are respectively installed between the output terminal of circuit breaker F109 and the low-voltage side switch control power input terminal, the high-voltage side switch control power input terminal, the transformer substation electrical interlock power input terminal, the measurement and control device power input terminal, and the switch power input terminal.

8. The energy storage transformer secondary system according to claim 1, characterized in that, The second input terminal of the dual power supply switching device ATS is connected to a surge protector FA01.

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