A storage energy router with hierarchical control of energy flow

Abstract

The present invention discloses an energy storage type energy router with hierarchical control of energy flow, including: a three-phase rectifier bridge, whose AC end is connected to the power grid, and the DC end of the three-phase rectifier bridge is the high-voltage side DC bus; a DC converter, whose first end is connected to the high-voltage side DC bus, and the second end of the DC converter is the low-voltage side DC bus; a transmission interface, which is connected to the low-voltage side DC bus, and a bidirectional inverter circuit is arranged on the transmission interface; an energy storage stabilizing capacitor C1, whose negative electrode is selectively connected to the positive or negative electrode of the low-voltage side DC bus, and the positive electrode of the energy storage stabilizing capacitor C1 is selectively connected to the input end or output end of the bidirectional inverter circuit, and the negative electrode of the energy storage stabilizing capacitor C1 is connected to the positive electrode of the low-voltage side DC bus and the positive electrode of the energy storage stabilizing capacitor C1 is connected to the input end of the bidirectional inverter circuit. The energy flow of the energy router of the present invention can achieve a balance between each interface device, the DC bus and the power grid, thereby improving the utilization rate of electric energy.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy internet, and in particular to an energy storage type energy router with hierarchical control of energy flow. Background Art

[0002] Energy Internet is based on the power grid. It uses power electronics technology, information technology and intelligent control technology to integrate multiple networks that generate or consume energy, such as the power grid, fossil fuel network, renewable energy network, distributed energy storage network, etc., to form an energy exchange and sharing network with efficient energy utilization and two-way energy flow. Among them, the power grid is an important carrier and key hub for the energy Internet to realize energy exchange and sharing.

[0003] The so-called energy router refers to a new type of intelligent electrical equipment that can connect two or more AC or DC power network nodes and can perform real-time regulation, distribution and active control of electric energy between different connected power grid nodes. It is one of the most core devices in the energy Internet.

[0004] There are many types of power supplies in energy routers, with different controllability levels. At the same time, the microgrid part of the distribution network also has multiple operating states such as grid-connected operation, island operation, and black start. Therefore, it is required to implement a hierarchical coordination control strategy for each power supply and load in the DC distribution network. At the energy distribution level, it is necessary to clarify the balance relationship between the power of each energy interface unit and the DC bus voltage, so as to sort out the working mode of the energy router to maintain the power balance inside the router. At the port access level, customized port access strategies are implemented for the working characteristics of batteries, supercapacitors, wind power generation, and photovoltaic panels, so that each port can maintain stable operation and work in the optimal range of performance and efficiency.

[0005] At present, energy routers have many problems in allocating energy flow between multiple interfaces, which is mainly reflected in the impact of multi-interface energy flow on the DC bus. The energy flow cannot be effectively consumed internally between the interfaces, causing voltage interference and impact on the power grid. Summary of the invention

[0006] In view of the above technical problems, the present invention discloses an energy storage type energy router with hierarchical control of energy flow, which buffers the electric energy generated on each interface to the energy storage and voltage stabilizing capacitor C1 on the low-voltage side DC bus, and then stably demonstrates the stored energy to the low-voltage side DC bus by charging in series and discharging in parallel through the energy storage and voltage stabilizing capacitor C1. If the electric energy released by the energy storage and voltage stabilizing capacitor C1 is greater than the electric energy consumption on the interface device, the DC converter and the three-phase rectifier bridge are controlled to operate, and the electric energy released by the energy storage and voltage stabilizing capacitor C1 is transmitted to the power grid or the first energy storage capacitor C2. Through the energy flow hierarchical control strategy of the present invention, the voltage on the DC bus of the router is stabilized in a balanced and controllable range, thereby reducing energy loss and improving the on-site use and efficiency of energy flow.

[0007] In order to achieve the purpose of the present invention, a storage energy router with hierarchical energy flow control is provided, comprising:

[0008] A three-phase rectifier bridge, whose AC end is connected to the power grid, and whose DC end is a high-voltage side DC bus;

[0009] A DC converter, a first end of which is connected to the high-voltage side DC bus, and a second end of which is the low-voltage side DC bus;

[0010] a transmission interface connected to the low-voltage side DC bus, wherein a bidirectional inverter circuit is provided on the transmission interface; and

[0011] The energy storage and voltage stabilizing capacitor C1 has a negative electrode selectively connected to the positive electrode or negative electrode of the low-voltage side DC bus, and the positive electrode of the energy storage and voltage stabilizing capacitor C1 is selectively connected to the input end or the output end of the bidirectional inverter circuit, and the negative electrode of the energy storage and voltage stabilizing capacitor C1 connected to the positive electrode of the low-voltage side DC bus and the positive electrode of the energy storage and voltage stabilizing capacitor C1 connected to the input end of the bidirectional inverter circuit cannot occur at the same time.

[0012] Preferably, the three-phase rectifier bridge is a bidirectional full-bridge rectifier circuit, a first energy storage capacitor C2 is arranged between the high-voltage side DC bus bars, and a second energy storage capacitor C3 is arranged between the low-voltage side DC bus bars.

[0013] Preferably, the DC converter adopts a bidirectional DC conversion unit, and a zero voltage soft switching circuit is provided on the DC converter. The high voltage side of the DC converter includes MOS tubes S1 to S4 and a first inductor L1. Capacitors and diodes are respectively connected in parallel at both ends of the MOS tubes S1 to S4. The first end of the first inductor L1 is connected to the center of the bridge arm of the MOS tube S1 and the MOS tube S2, and the second end of the first inductor L1 is connected to the high voltage side of the transformer TR.

[0014] Preferably, the transmission interface includes at least one single-phase transmission port and one three-phase transmission port, the single-phase transmission port includes a single-phase inverter circuit, the three-phase transmission port includes a three-phase inverter circuit, and the DC ends of the single-phase inverter circuit and the three-phase inverter circuit are connected to the low-voltage side DC bus.

[0015] Preferably, it also includes an input interface for accessing external input electrical energy, the input interface is connected to the low-voltage side DC bus, and a buck-boost circuit is arranged on the input interface; the buck-boost circuit is one of buck and boost switching circuits or a combination of both.

[0016] Preferably, the center of the first bridge arm of the three-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through the first diode D1, the center of the second bridge arm of the three-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through the second diode D2, and the center of the third bridge arm of the three-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through the third diode D3, wherein the cathodes of the first diode D1 to the third diode D3 are connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1.

[0017] Preferably, the center of the first bridge arm of the single-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through a fourth diode D4, and the center of the second bridge arm of the three-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through a fifth diode D5, wherein the cathodes of the fourth diode D4 to the fifth diode D5 are connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1.

[0018] Preferably, the negative electrode of the energy storage and voltage stabilizing capacitor C1 is connected to the positive electrode of the low-voltage side DC bus through a MOS tube S9, and the negative electrode of the energy storage and voltage stabilizing capacitor C1 is connected to the negative electrode of the low-voltage side DC bus through a MOS tube S8.

[0019] Preferably, the positive electrode of the energy storage and voltage stabilizing capacitor C1 is connected to the positive electrode of the low-voltage side DC bus through a MOS tube S7, and a second inductor L2 is connected between the cathodes of the first diode D1 to the fifth diode D5 and the positive electrode of the energy storage and voltage stabilizing capacitor C1;

[0020] Among them, the MOS transistor S9 and the MOS transistor S7 cannot be turned on at the same time.

[0021] Preferably, the negative pole of the low-voltage side DC bus is connected to a seventh diode D7, the anode of the seventh diode D7 is connected to the negative pole of the low-voltage side DC bus, the cathode of the seventh diode D7 is connected to a plurality of connection terminals, the connection terminals are combined with the AC end of the single-phase inverter circuit to form the single-phase transmission port, the connection terminals are combined with the AC end of the three-phase inverter circuit to form the three-phase transmission port, and the connection terminals are connected to the induction coil of the device connected to the transmission interface.

[0022] The present invention has at least the following beneficial effects:

[0023] 1. The energy flow of the energy router of the present invention can achieve a balance between various interface devices, DC bus and power grid, thereby improving the utilization rate of electric energy;

[0024] 2. By transferring, absorbing, storing and reusing the electric energy on the low-voltage DC bus, the DC bus voltage is stabilized, the stability of the voltage of each interface is improved, and the local utilization rate of the energy flow is improved, reducing the energy loss caused by long-distance transmission, multiple charging and discharging, etc.;

[0025] 3. The present invention constructs an energy Internet system with an energy storage energy router as the core.

[0026] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a circuit diagram of the present invention;

[0028] Figure 2 It is the circuit diagram of DC converter;

[0029] Figure 3 This is the schematic diagram of the energy storage and voltage stabilizing capacitor connection circuit

[0030] Figure 4 It is a schematic diagram of three-phase transmission port. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0032] It should be understood that terms such as “having”, “including” and “comprising” used herein do not specify the existence or addition of one or more other elements or combinations thereof.

[0033] like Figure 1-4 What is shown is an implementation form of an energy storage type energy router with hierarchical energy flow control according to the present invention, which includes: a three-phase rectifier bridge, a DC converter, a transmission interface, an input interface, an access device and an energy storage voltage stabilizing capacitor C1, etc.

[0034] The AC end of the three-phase rectifier bridge is connected to the power grid, the DC end of the three-phase rectifier bridge is the high-voltage side DC bus, the three-phase rectifier bridge is a bidirectional full-bridge rectifier circuit, a first energy storage capacitor C2 is arranged between the high-voltage side DC bus, and a second energy storage capacitor C3 is arranged between the low-voltage side DC bus. The first energy storage capacitor C2 and the second energy storage capacitor C3 are used to store electric energy on the high- and low-voltage side DC buses to stabilize the DC bus voltage. When the first energy storage capacitor C2 and the second energy storage capacitor C3 are saturated, the electric energy can be connected to the power grid after inversion by the three-phase rectifier bridge to realize power generation, and at the same time, compensation is performed for the power grid to promote the stability of the power grid voltage.

[0035] The DC converter is connected between the high-voltage side DC bus and the low-voltage side DC bus, and a zero-voltage soft switching circuit is provided on the DC converter. Specifically, the DC converter adopts a bidirectional DC conversion unit, which is a prior art and is not specifically introduced in the present invention. The high-voltage side of the DC converter includes MOS tubes S1 to S4, a first inductor L1, and capacitors and diodes are connected in parallel at both ends of the MOS tubes S1 to S4, respectively. The first end of the first inductor L1 is connected to the center of the bridge arm of the MOS tube S1 and the MOS tube S2. The first inductor L1, the MOS tubes S1 to S4, and the capacitors and diodes connected in parallel at both ends respectively constitute a zero-voltage soft switching circuit, and the zero-voltage switch conversion process is realized by program-controlling the circuit freewheeling state, the resonance process of converting from the freewheeling state to the output power, and the resonance process of converting from the output power state to the freewheeling state, thereby reducing the switching loss. Among them, the second end of the first inductor L1 is connected to the high-voltage side of the transformer TR.

[0036] The input interface is connected to the low-voltage side DC bus, and a step-up and step-down circuit is arranged on the input interface. The step-up and step-down circuit is one of buck and boost switching circuits or a combination of both. Energy storage and power generation equipment such as batteries, capacitors, and solar cells can be connected to the low-voltage side DC bus through the step-up and step-down circuit to distribute and use electric energy locally, and excess electric energy can be connected to the power grid through a DC converter and a bidirectional full-bridge rectifier circuit.

[0037] The transmission interface is connected to the low-voltage side DC bus, and a bidirectional inverter circuit is arranged on the transmission interface; specifically, the transmission interface includes at least one single-phase transmission port and one three-phase transmission port, the single-phase transmission port includes a single-phase inverter circuit, the three-phase transmission port includes a three-phase inverter circuit, and the DC ends of the single-phase inverter circuit and the three-phase inverter circuit are connected to the low-voltage side DC bus. Energy storage and power generation equipment such as batteries, capacitors, and solar cells can be connected to the low-voltage DC bus through a single-phase inverter circuit. Three-phase inductive equipment such as three-phase motors can be connected to the low-voltage DC bus through a three-phase inverter circuit. The energy flow is stored and redistributed on the low-voltage DC bus. The energy flow can be balanced between each interface device and the DC bus and the power grid, thereby improving the utilization rate of electric energy. At the same time, an energy Internet system with an energy storage energy router as the core is constructed. By transferring, absorbing, storing, and reusing the electric energy on the low-voltage DC bus, the DC bus voltage is stabilized, the stability of the voltage of each interface is improved, and the local utilization rate of the energy flow is improved, reducing the energy loss caused by long-distance transmission and multiple charging and discharging.

[0038] The center of the first bridge arm of the three-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through the first diode D1, the center of the second bridge arm of the three-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through the second diode D2, and the center of the third bridge arm of the three-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through the third diode D3, wherein the cathodes of the first diode D1 to the third diode D3 are connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1.

[0039] The arrangement of the first diode D1 to the third diode D3 provides an energy flow feedback loop for the three-phase inverter circuit. When each phase of the three-phase device generates electric energy, the feedback electric energy is transmitted through the corresponding diode and stored in the energy storage and voltage stabilizing capacitor C1. The energy storage and voltage stabilizing capacitor C1 plays the role of electric energy absorption, storage and redistribution, and stabilizes the DC bus voltage.

[0040] The center of the first bridge arm of the single-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through the fourth diode D4, and the center of the second bridge arm of the three-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through the fifth diode D5, wherein the cathodes of the fourth diode D4 to the fifth diode D5 are connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1. The single-phase inductive device can also be connected to the output end of the single-phase inverter circuit, and when the single-phase inductive device generates electric energy, the feedback electric energy is transmitted and stored in the energy storage and voltage stabilizing capacitor C1 through the fourth diode D4.

[0041] The negative electrode of the energy storage and voltage stabilizing capacitor C1 is selectively connected to the positive electrode or negative electrode of the low-voltage side DC bus, and the positive electrode of the energy storage and voltage stabilizing capacitor C1 is selectively connected to the input end or the output end of the bidirectional inverter circuit. The negative electrode of the energy storage and voltage stabilizing capacitor C1 connected to the positive electrode of the low-voltage side DC bus and the positive electrode of the energy storage and voltage stabilizing capacitor C1 connected to the input end of the bidirectional inverter circuit cannot occur at the same time.

[0042] In a specific embodiment, the negative electrode of the energy storage and voltage stabilizing capacitor C1 is connected to the positive electrode of the low-voltage DC bus through a MOS tube S9, and the negative electrode of the energy storage and voltage stabilizing capacitor C1 is connected to the negative electrode of the low-voltage DC bus through a MOS tube S8. The positive electrode of the energy storage and voltage stabilizing capacitor C1 is connected to the positive electrode of the low-voltage DC bus through a MOS tube S7, and a second inductor L2 is connected between the cathodes of the first diode D1 to the fifth diode D5 and the positive electrode of the energy storage and voltage stabilizing capacitor C1, and the second inductor L2 plays a buffering role. Among them, the MOS tube S9 and the MOS tube S7 cannot be turned on at the same time to avoid short-circuiting the energy storage and voltage stabilizing capacitor C1.

[0043] The negative pole of the DC busbar on the low voltage side is connected to a seventh diode D7, the anode of the seventh diode D7 is connected to the negative pole of the DC busbar on the low voltage side, the cathode of the seventh diode D7 is connected to a plurality of connection terminals, the connection terminal is combined with the AC end of the single-phase inverter circuit to form the single-phase transmission port, the connection terminal is combined with the AC end of the three-phase inverter circuit to form the three-phase transmission port, the connection terminal is connected to the induction coil of the device connected to the transmission interface, specifically connected to the neutral point of the induction coil, the three-phase induction device or the single-phase induction device connected to the transmission interface transmits the electric energy to the positive pole of the DC busbar through the negative pole of the DC busbar, the seventh diode D7, the connection terminal, the induction coil, the corresponding first diode D1 to the fifth diode D5, the second inductor L2, and the energy storage and voltage stabilizing capacitor C1, so as to form an energy flow loop. If the energy storage device, capacitor, etc. are connected to the transmission interface, there is no need to flow through the seventh diode D7, and the energy flow loop can be formed directly by opening any lower bridge arm of the corresponding three-phase inverter circuit or single-phase inverter circuit.

[0044] The working process is as follows:

[0045] The device is plugged into the transmission interface. When the inductive device generates electricity or the inductive coil of the inductive device generates electric energy due to resonance, short circuit fault, etc., an energy loop is formed through diodes D1 to D5, the second inductor L2, the energy storage and voltage stabilizing capacitor C1, the MOS tube S9, the positive electrode of the low-voltage side DC bus, the second energy storage capacitor C3, the negative electrode of the low-voltage side DC bus, and the diode D7. The feedback electric energy is stored in the energy storage and voltage stabilizing capacitor C1, and the feedback capacitance is stored in the energy storage and voltage stabilizing capacitor C1 and the second energy storage capacitor C3. The energy storage and voltage stabilizing capacitor C1 and the second energy storage capacitor C3 are charged in series, which improves the withstand voltage value of the capacitor. Especially when the voltage of the feedback electric energy is high, the safety of the entire circuit and the device can be effectively protected.

[0046] After the feedback electric energy is completely absorbed by the energy storage and voltage stabilizing capacitor C1 and the second energy storage capacitor C3, the MOS tube S7 is controlled to be turned on, the MOS tube S9 is turned off, and the MOS tube S8 is turned on, so that the energy storage and voltage stabilizing capacitor C1 and the second energy storage capacitor C3 are connected in parallel between the low-voltage side DC bus, and the electric energy on the energy storage and voltage stabilizing capacitor C1 and the second energy storage capacitor C3 is released to the DC bus in an orderly and stable manner, and finally consumed on-site by the terminal equipment. It can be seen that the electric energy generated on each interface is buffered to the energy storage and voltage stabilizing capacitor C1 on the low-voltage side DC bus, and then The energy storage and voltage stabilizing capacitor C1 is charged in series and discharged in parallel to stably store energy on the low-voltage DC bus. If the electric energy released by the energy storage and voltage stabilizing capacitor C1 is greater than the electric energy consumption of the interface device, the DC converter and the three-phase rectifier bridge are controlled to operate, and the electric energy released by the energy storage and voltage stabilizing capacitor C1 is transmitted to the power grid or the first energy storage capacitor C2. Through the energy flow hierarchical control strategy of the present invention, the voltage on the DC bus of the router is stabilized in a balanced and controllable range, thereby reducing energy loss and improving the local use and efficiency of energy flow.

[0047] The energy flow of the energy router of the present invention can achieve a balance between various interface devices, the DC bus and the power grid, thereby improving the utilization rate of electric energy; the present invention constructs an energy Internet system with an energy storage type energy router as the core, which stabilizes the DC bus voltage and improves the stability of the use of individual interface voltages by transferring-absorbing-storing-reusing the electric energy on the low-voltage side DC bus, while improving the on-site utilization rate of the energy flow and reducing the energy loss caused by long-distance transmission, multiple charging and discharging, etc.

[0048] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An energy storage type energy router with hierarchical control of energy flow, characterized in that: include: A three-phase rectifier bridge, whose AC end is connected to the power grid, and whose DC end is a high-voltage side DC bus; A DC converter, a first end of which is connected to the high-voltage side DC bus, and a second end of which is the low-voltage side DC bus; A transmission interface connected to the low-voltage DC bus, wherein a bidirectional inverter circuit is provided on the transmission interface; and The energy storage and voltage stabilizing capacitor C1 has a negative electrode selectively connected to the positive electrode or negative electrode of the low-voltage side DC bus, and the positive electrode of the energy storage and voltage stabilizing capacitor C1 is selectively connected to the input end or the output end of the bidirectional inverter circuit, and the negative electrode of the energy storage and voltage stabilizing capacitor C1 connected to the positive electrode of the low-voltage side DC bus and the positive electrode of the energy storage and voltage stabilizing capacitor C1 connected to the input end of the bidirectional inverter circuit cannot occur at the same time.

2. The energy storage type energy router with hierarchical energy flow control as claimed in claim 1, characterized in that: The three-phase rectifier bridge is a bidirectional full-bridge rectifier circuit. A first energy storage capacitor C2 is arranged between the high-voltage side DC busbars, and a second energy storage capacitor C3 is arranged between the low-voltage side DC busbars.

3. The energy storage type energy router with hierarchical energy flow control as claimed in claim 2, characterized in that: The DC converter adopts a bidirectional DC conversion unit, and a zero voltage soft switching circuit is provided on the DC converter. The high voltage side of the DC converter includes MOS transistors S1 to S4 and a first inductor L1. Capacitors and diodes are respectively connected in parallel at both ends of the MOS transistors S1 to S4. A first end of the first inductor L1 is connected to the center of the bridge arm of the MOS transistors S1 and S2, and a second end of the first inductor L1 is connected to the high voltage side of the transformer TR.

4. The energy storage type energy router with hierarchical energy flow control as claimed in claim 3, characterized in that: The transmission interface includes at least one single-phase transmission port and one three-phase transmission port, the single-phase transmission port includes a single-phase inverter circuit, the three-phase transmission port includes a three-phase inverter circuit, and the DC ends of the single-phase inverter circuit and the three-phase inverter circuit are connected to the low-voltage side DC bus.

5. The energy storage type energy router with hierarchical energy flow control as claimed in claim 1, characterized in that: It also includes an input interface for accessing external input electrical energy, the input interface is connected to the low-voltage side DC bus, and a buck-boost circuit is arranged on the input interface; the buck-boost circuit is one of buck and boost switching circuits or a combination of both.

6. The energy storage type energy router with hierarchical energy flow control as claimed in claim 4, characterized in that: The center of the first bridge arm of the three-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through the first diode D1, the center of the second bridge arm of the three-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through the second diode D2, and the center of the third bridge arm of the three-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through the third diode D3, wherein the cathodes of the first diode D1 to the third diode D3 are connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1.

7. The energy storage type energy router with hierarchical energy flow control as claimed in claim 6, characterized in that: The center of the first bridge arm of the single-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through the fourth diode D4, and the center of the second bridge arm of the three-phase inverter circuit is connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1 through the fifth diode D5, wherein the cathodes of the fourth diode D4 to the fifth diode D5 are connected to the positive electrode of the energy storage and voltage stabilizing capacitor C1.

8. The energy storage type energy router with hierarchical energy flow control as claimed in claim 7, characterized in that: The negative electrode of the energy storage and voltage stabilizing capacitor C1 is connected to the positive electrode of the low-voltage side DC bus through the MOS tube S9, and the negative electrode of the energy storage and voltage stabilizing capacitor C1 is connected to the negative electrode of the low-voltage side DC bus through the MOS tube S8.

9. The energy storage type energy router with hierarchical energy flow control as claimed in claim 8, characterized in that: The positive electrode of the energy storage and voltage stabilizing capacitor C1 is connected to the positive electrode of the low-voltage DC bus through a MOS tube S7, and a second inductor L2 is connected between the cathodes of the first diode D1 to the fifth diode D5 and the positive electrode of the energy storage and voltage stabilizing capacitor C1; Among them, the MOS transistor S9 and the MOS transistor S7 cannot be turned on at the same time.

10. The energy storage type energy router with hierarchical energy flow control as claimed in claim 9, characterized in that: The negative pole of the low-voltage side DC bus is connected to a seventh diode D7, the anode of the seventh diode D7 is connected to the negative pole of the low-voltage side DC bus, the cathode of the seventh diode D7 is connected to a plurality of connection terminals, the connection terminals are combined with the AC end of the single-phase inverter circuit to form the single-phase transmission port, the connection terminals are combined with the AC end of the three-phase inverter circuit to form the three-phase transmission port, and the connection terminals are connected to the induction coil of the device connected to the transmission interface.

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