Distributed integrated power supply

Abstract

The utility model relates to the technical field of distributed power supplies, in particular to a distributed integrated power supply, which comprises a direct-current battery I, a direct-current battery II, an alternating-current inverter, a direct-current converter, a series-parallel switching circuit, a power supply control module and a monitoring communication module, the first direct-current battery is electrically connected with the alternating-current inverter, the second direct-current battery is electrically connected with the direct-current converter, the first direct-current battery and the second direct-current battery are electrically connected through the series-parallel connection switching circuit, and the power supply control module is electrically connected with the first direct-current battery, the second direct-current battery and the series-parallel connection switching circuit. Series-parallel switching of the first direct-current battery and the second direct-current battery is realized through the series-parallel switching circuit, so that voltage and current output of the distributed integrated power supply can be adjusted according to actual needs, and flexibility and adaptability of the power supply are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of distributed power supplies, in particular to a distributed integrated power supply. Background Art

[0002] As the power generation of renewable energy technologies such as photovoltaics and wind power continues to increase, the demand for renewable energy storage has become increasingly prominent. Directly connecting the power generation of renewable energy to the power grid will seriously affect the stability of the power grid due to the intermittent and instability of new energy. Therefore, the introduction of energy storage technology has become the key to solving this problem.

[0003] New energy storage systems can help the power system better digest and access new energy. During the peak period of new energy generation, excess electricity can be stored and released during the peak period of electricity consumption to meet the needs of the power system. At present, most new energy storage systems use energy storage batteries to store and transmit electricity, and the energy storage battery monomers are directly connected in series. The problem of single-cell failure affecting the entire group is prominent. The series structure of energy storage batteries requires that the electrical parameters of each energy storage battery maintain strict consistency. Partial battery damage cannot be solved by adding new batteries. When most batteries are intact, the entire group will be scrapped; and the series structure of energy storage batteries only supports direct and alternating current conversion through energy storage inverters to achieve AC grid-connected output. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a distributed integrated power supply, including a DC battery 1, a DC battery 2, an AC inverter, a DC converter, a series-parallel switching circuit, a power control module and a monitoring communication module; the DC battery 1 is electrically connected to the AC inverter, the DC battery 2 is electrically connected to the DC converter, the DC battery 1 is electrically connected to the DC battery 2 through the series-parallel switching circuit, and the power control module is electrically connected to the DC battery 1, the DC battery 2 and the series-parallel switching circuit respectively;

[0005] The power control module includes an AC input module, a rectifier module, a main control unit, and a battery management module. The AC input module is electrically connected to DC battery 1 and DC battery 2 respectively through the rectifier module, the battery management module is electrically connected to DC battery 1 and DC battery 2 respectively, and the main control unit is electrically connected to the battery management module.

[0006] To achieve series-parallel switching of DC batteries one and two, the series-parallel switching circuit includes a single-pole three-throw radio frequency switch one and a single-pole three-throw radio frequency switch two. The single-pole three-throw radio frequency switch one is electrically connected to DC battery one, and the single-pole three-throw radio frequency switch two is electrically connected to DC battery two.

[0007] The series ends of the single-pole three-throw radio frequency switch 1 and the single-pole three-throw radio frequency switch 2 are connected through a wire, the parallel end of the single-pole three-throw radio frequency switch 1 is connected to the positive electrode of the DC battery 2, and the parallel end of the single-pole three-throw radio frequency switch 2 is connected to the negative electrode of the DC battery 1.

[0008] The distributed integrated power supply also includes an insulation detection module, and the insulation detection module is electrically connected to the DC battery 1 and the DC battery 2 respectively.

[0009] Circuit breakers are provided between the DC battery 1 and the AC inverter, and between the DC battery 2 and the DC converter.

[0010] In order to realize remote monitoring of the distributed integrated power supply, the monitoring communication module is wirelessly connected to the remote interaction center.

[0011] In a specific implementation, the main control unit uses a STM32F303RBT6 processor.

[0012] The single-pole triple-throw radio frequency switch model is SKY13317-373LF.

[0013] Beneficial effects: The utility model is a distributed integrated power supply, which realizes the series-parallel switching of DC battery 1 and DC battery 2 through a series-parallel switching circuit, so that the voltage and current output of the distributed integrated power supply can be adjusted according to actual needs, thereby improving the flexibility and adaptability of the power supply. At the same time, the power control module can control the charging and discharging of DC battery 1 and DC battery 2, thereby ensuring the stability and reliability of the power supply. In addition, the provision of an insulation detection module can timely detect insulation faults, improve the safety of the power supply, and remotely monitor the operating status of the power supply in real time, thereby improving the maintenance efficiency of the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a distributed integrated power supply;

[0015] Figure 2 This is the series-parallel switching circuit diagram. DETAILED DESCRIPTION

[0016] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0017] See also Figure 1 This embodiment provides a distributed integrated power supply, which stores new energy electric energy by independently arranging the distributed integrated power supply on the renewable new energy side and connecting its input end to the electric energy output end of the renewable new energy.

[0018] The distributed integrated power supply specifically includes a DC battery 1, a DC battery 2, an AC inverter, a DC converter, a series-parallel switching circuit, a power control module and a monitoring communication module, wherein the DC battery 1 is electrically connected to the AC inverter, the DC battery 1 can transmit the stored electric energy to the AC inverter, the AC inverter can convert the stored electric energy into AC, and realize the AC output of the distributed integrated power supply; the DC battery 2 is electrically connected to the DC converter, and the DC battery 2 performs a DC voltage step-up conversion through the DC converter to realize the DC voltage output; the DC battery 1 and the DC battery 2 are electrically connected through a series-parallel switching circuit, and when the distributed integrated power supply is used normally, the series-parallel switching circuit can block the electrical connection relationship between the DC battery 1 and the DC battery 2, and realize the normal output operation of the DC battery 1 and the DC battery 2. At the same time, when the DC battery 1 and the DC battery 2 need to be used in combination, the series-parallel connection of the DC battery 1 and the DC battery 2 is realized through the series-parallel switching circuit.

[0019] The power control module is electrically connected to DC battery 1, DC battery 2 and the series-parallel switching circuit respectively. The power control module can collect the power and terminal voltage signals of DC battery 1 and DC battery 2 in real time, and transmit the switching signal to the series-parallel switching circuit. The monitoring communication module is connected to the power control module by serial communication. The power control module can transmit the collected data signal to the monitoring communication module. The monitoring communication module can be connected to the remote interaction center by wireless communication, and the operating status of the distributed integrated power supply is fed back to the remote interaction center in real time, so that the operation and maintenance personnel can monitor and maintain it conveniently.

[0020] As a preferred implementation, the power control module includes an AC input module, a rectifier module, a main control unit, and a battery management module. The input end of the AC input module is connected to the electric energy output end of renewable energy, and its output end is electrically connected to DC battery 1 and DC battery 2 respectively through the rectifier module. The battery is charged through the AC input module to store the new energy electric energy; the battery management module is connected to DC battery 1 and DC battery 2 respectively, and can detect the remaining electric energy of DC battery 1 and DC battery 2, and detect the terminal voltage signal of DC battery 1 and DC battery 2 in the electric energy output state; the main control unit is electrically connected to the battery management module, and its main control unit adopts the STM32F303RBT6 chip.

[0021] like Figure 2As shown, in order to realize the series-parallel switching of the battery pack when needed by the distributed integrated power supply, the DC battery 1 and the DC battery 2 can be operated independently in other states to realize the common use of AC output and DC output, the series-parallel switching circuit includes a single-pole three-throw RF switch 1 and a single-pole three-throw RF switch 2, and the single-pole three-throw RF switch model is SKY13317-373LF. The single-pole three-throw RF switch 1 is electrically connected to the DC battery 1, and the single-pole three-throw RF switch 2 is electrically connected to the DC battery 2. The series ends of the single-pole three-throw RF switch 1 and the single-pole three-throw RF switch 2 are connected by wires, the parallel end of the single-pole three-throw RF switch 1 is connected to the positive electrode of the DC battery 2, and the parallel end of the single-pole three-throw RF switch 2 is connected to the negative electrode of the DC battery 1.

[0022] In order to ensure the safety of the distributed integrated power supply when releasing stored energy, an insulation detection module is also provided. The insulation detection module is electrically connected to the output ends of each DC battery, respectively, and can detect the leakage state of the battery output end in real time to prevent leakage from occurring during use, thereby causing damage to various devices inside the distributed integrated power supply.

[0023] When the insulation detection module detects the presence of leakage, the distributed integrated power supply uses a circuit breaker to cut off the power as a whole. Circuit breakers are provided between the DC battery 1 and the AC inverter, and between the DC battery 2 and the DC converter. When the insulation detection module detects the presence of an insulation fault in the distributed integrated power supply, the circuit breaker switch can be disconnected to cut off the power output of the DC batteries 1 and 2, thereby improving the safety of the power supply.

Claims

1. A distributed integrated power supply, characterized in that: It includes a DC battery 1, a DC battery 2, an AC inverter, a DC converter, a series-parallel switching circuit, a power control module and a monitoring communication module; the DC battery 1 is electrically connected to the AC inverter, the DC battery 2 is electrically connected to the DC converter, the DC battery 1 is electrically connected to the DC battery 2 through the series-parallel switching circuit, and the power control module is electrically connected to the DC battery 1, the DC battery 2 and the series-parallel switching circuit respectively; The power control module includes an AC input module, a rectifier module, a main control unit, and a battery management module. The AC input module is electrically connected to DC battery 1 and DC battery 2 respectively through the rectifier module, the battery management module is electrically connected to DC battery 1 and DC battery 2 respectively, and the main control unit is electrically connected to the battery management module.

2. The distributed integrated power supply according to claim 1, characterized in that: The series-parallel switching circuit includes a single-pole three-throw radio frequency switch 1 and a single-pole three-throw radio frequency switch 2. The single-pole three-throw radio frequency switch 1 is electrically connected to a direct current battery 1, and the single-pole three-throw radio frequency switch 2 is electrically connected to a direct current battery 2.

3. The distributed integrated power supply according to claim 2, characterized in that: The series ends of the single-pole three-throw radio frequency switch 1 and the single-pole three-throw radio frequency switch 2 are connected through a wire, the parallel end of the single-pole three-throw radio frequency switch 1 is connected to the positive electrode of the DC battery 2, and the parallel end of the single-pole three-throw radio frequency switch 2 is connected to the negative electrode of the DC battery 1.

4. The distributed integrated power supply according to claim 1, characterized in that: It also includes an insulation detection module, which is electrically connected to the DC battery 1 and the DC battery 2 respectively.

5. The distributed integrated power supply according to claim 1, characterized in that: Circuit breakers are provided between the DC battery 1 and the AC inverter, and between the DC battery 2 and the DC converter.

6. The distributed integrated power supply according to claim 1, characterized in that: The monitoring communication module is connected to the remote interaction center by wireless communication.

7. The distributed integrated power supply according to claim 1, characterized in that: The main control unit adopts STM32F303RBT6 chip.

8. The distributed integrated power supply according to claim 2, characterized in that: The single-pole triple-throw radio frequency switch model is SKY13317-373LF.

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