Power stability adjusting device for new energy access power grid

Abstract

The utility model relates to the technical field of power stabilizing devices, and discloses a power stabilizing and adjusting device for new energy access to a power grid, which comprises a local sensor module, a control module and a power stabilizing module, the local sensor module is used for collecting the output power of the new energy power generation unit, the charging and discharging current of the energy storage unit and the frequency and voltage fluctuation data of the power grid side in real time. According to the utility model, after the local sensor module acquires data, the data is processed by the edge computing unit, the FPGA chip sends accurate control signals to the power electronic converter according to the received data, and meanwhile, the multi-core processor performs data interaction with the FPGA chip through the network switch and performs complex decisions in combination with a real-time database, such as regulation and control of a power distribution switch. The cooperative control mode can quickly respond to the change of the power grid, realizes the accurate and stable adjustment of the new energy access power grid power, and guarantees the electric energy quality.

Description

Technical Field

[0001] This utility model relates to the field of power stabilization device technology, specifically a power stabilization and regulation device for new energy access to the power grid. Background Technology

[0002] In the process of integrating new energy sources into the power grid, power stabilization devices play a crucial role. These devices are mainly used to regulate the unstable electrical energy generated by new energy power generation, ensuring that it can be connected to the grid with a stable power output, maintaining the normal operation of the grid, and avoiding instability in grid parameters such as voltage and frequency caused by fluctuations in the power generation of new energy sources, thereby ensuring the safe and reliable power supply of the power system.

[0003] In existing technologies, while regulation devices based on traditional energy storage (such as lithium batteries and supercapacitors) can achieve power compensation, their core drawback lies in the contradiction between dynamic response speed and regulation accuracy. For example, mechanical energy storage systems are limited by charge and discharge rates and cycle life, making it difficult to adapt to the second- or millisecond-level fluctuations in new energy power; while regulation strategies relying on fixed thresholds or single control algorithms lack the ability to adapt to complex operating conditions and are prone to regulation lag or overcompensation problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the prior art, this utility model provides a power stabilization and regulation device for new energy grid access, which has the advantages of improving the regulation capability of new energy grid access power, effectively coping with the rapid fluctuation of new energy power, and improving the stability and reliability of the grid, thus solving the above-mentioned technical problems.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a power stabilization and regulation device for new energy grid access, comprising a local sensor module, which consists of a current transformer, a voltage sensor and a power analyzer, and the local sensor module is used to collect in real time the output power of the new energy power generation unit, the charging and discharging current of the energy storage unit and the frequency and voltage fluctuation data of the grid side.

[0008] An edge computing unit, comprising an embedded microcontroller and an FPGA chip, is used to receive data from the local sensor module;

[0009] A power electronic converter, comprising a bidirectional converter and a static synchronous compensator, wherein the DC side of the bidirectional converter is connected to an energy storage unit and the AC side is coupled to the power grid, and the static synchronous compensator is connected in parallel with the power grid bus to perform reactive power compensation.

[0010] A hybrid energy storage unit comprises a lithium battery pack, a supercapacitor, and a flywheel energy storage device connected in parallel. The lithium battery pack, supercapacitor, and flywheel energy storage device are connected to the bidirectional converter through independent converters, and a power distribution switch is provided between the DC bus of the lithium battery pack and the supercapacitor.

[0011] The decision module includes a multi-core processor and a real-time database, wherein the multi-core processor is connected to the real-time database via a data cable;

[0012] The communication module comprises a network switch and an optical fiber ring network. The network switch is directly connected to the FPGA chip, and the optical fiber ring network is coupled between the decision module and the network switch.

[0013] Preferably, the current transformer, voltage sensor, and power analyzer are electrically connected in sequence, and together they transmit the collected data to the embedded microcontroller via wired transmission.

[0014] Preferably, the FPGA chip is connected to the embedded microcontroller via a high-speed data bus, the control signal input terminal of the bidirectional converter is connected to the output terminal of the FPGA chip, and the control signal input terminal of the static synchronous compensator is also connected to the output terminal of the FPGA chip.

[0015] Preferably, the input terminals of the converter are electrically connected to the lithium battery pack, the supercapacitor, and the flywheel energy storage device respectively, the output terminal of the converter is electrically connected to the DC side of the bidirectional converter, the power distribution switch is connected in series between the DC bus of the lithium battery pack and the supercapacitor, and the control terminal of the power distribution switch is connected to the output terminal of the multi-core processor.

[0016] Preferably, the multi-core processor interacts with the FPGA chip via a network switch, and the two ends of the fiber optic ring network are respectively connected to the fiber optic interfaces of the multi-core processor and the network switch.

[0017] Preferably, the AC side of the bidirectional converter is connected to the grid bus via a filter reactor, the static synchronous compensator is directly connected in parallel to the grid bus via a connecting cable, and an overcurrent protection circuit is provided between the hybrid energy storage unit and the bidirectional converter.

[0018] Compared with the prior art, this utility model provides a power stabilization and regulation device for new energy grid access, which has the following beneficial effects:

[0019] 1. This utility model features a lithium battery pack with high energy density, capable of storing large amounts of electrical energy for extended periods; a supercapacitor with fast response speed, allowing for rapid charging and discharging to adapt to instantaneous power changes; a flywheel energy storage device with high power density and long lifespan; and a connection to a bidirectional converter via an independent converter, along with flexible control via a power distribution switch. This allows for optimization of the energy management of the energy storage system based on power fluctuations in new energy generation and grid load demands, enhancing the ability to regulate the power of new energy connected to the grid, effectively addressing rapid fluctuations in new energy power, and improving the stability and reliability of the grid.

[0020] 2. This utility model collects data through a local sensor module, processes it through an edge computing unit, and sends precise control signals to the power electronic converter based on the received data. At the same time, the multi-core processor interacts with the FPGA chip through a network switch and makes complex decisions in conjunction with a real-time database, such as adjusting the power distribution switch. This collaborative control method can quickly respond to changes in the power grid, achieve precise and stable regulation of the power of new energy sources connected to the power grid, ensure power quality, and reduce the adverse effects of power fluctuations on the power grid. Attached Figure Description

[0021] Figure 1 This is a logic block diagram of the present invention.

[0022] The components include: 1. Local sensor module; 11. Current transformer; 12. Voltage sensor; 13. Power analyzer; 2. Edge computing unit; 21. Embedded microcontroller; 22. FPGA chip; 3. Power electronic converter; 31. Bidirectional converter; 32. Static synchronous compensator; 4. Hybrid energy storage unit; 41. Lithium battery pack; 42. Supercapacitor; 43. Flywheel energy storage device; 44. Converter; 45. Power distribution switch; 5. Decision module; 51. Multi-core processor; 52. Real-time database; 6. Communication module; 61. Network switch; 62. Fiber optic ring network. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1A power stabilization and regulation device for new energy grid access includes a local sensor module 1, which consists of a current transformer 11, a voltage sensor 12 and a power analyzer 13. The local sensor module 1 is used to collect the output power of the new energy power generation unit, the charging and discharging current of the energy storage unit and the frequency and voltage fluctuation data of the grid side in real time.

[0025] The edge computing unit 2 comprises an embedded microcontroller 21 and an FPGA chip 22, and the edge computing unit 2 is used to receive data from the local sensor module 1.

[0026] The power electronic converter 3 comprises a bidirectional converter 31 and a static synchronous compensator 32. The DC side of the bidirectional converter 31 is connected to the energy storage unit, and the AC side is coupled to the power grid. The static synchronous compensator 32 is connected in parallel with the power grid bus to perform reactive power compensation.

[0027] The hybrid energy storage unit 4 comprises a lithium battery pack 41, a supercapacitor 42 and a flywheel energy storage device 43 connected in parallel. The lithium battery pack 41, the supercapacitor 42 and the flywheel energy storage device 43 are connected to the bidirectional converter 31 through an independent converter 44, and a power distribution switch 45 is provided between the DC bus of the lithium battery pack 41 and the supercapacitor 42.

[0028] Decision module 5 includes a multi-core processor 51 and a real-time database 52, with the multi-core processor 51 connected to the real-time database 52 via a data cable;

[0029] The communication module 6 consists of a network switch 61 and an optical fiber ring network 62. The network switch 61 is directly connected to the FPGA chip 22, and the optical fiber ring network 62 is coupled between the decision module 5 and the network switch 61.

[0030] Specifically, the current transformer 11, voltage sensor 12, and power analyzer 13 are electrically connected in sequence, and together they transmit the collected data to the embedded microcontroller 21 via wired transmission.

[0031] The advantages are that the current transformer 11 acquires the current signal in real time by measuring the output current of the new energy power generation unit, providing basic data for subsequent power calculation; the voltage sensor 12 synchronously collects voltage fluctuation data from the grid side, ensuring accurate monitoring of voltage parameters; the power analyzer 13 receives the input from the current transformer 11 and the voltage sensor 12, comprehensively calculates key indicators such as active power, reactive power, power factor, and harmonic components, fully reflecting the output characteristics and power quality of the new energy power generation; the sequential electrical connection design ensures the timing and consistency of data acquisition, avoiding errors caused by signal asynchrony; Line transmission methods (such as RS-485 or Ethernet) can effectively avoid the problems of delay, packet loss and electromagnetic interference in wireless communication, ensuring high real-time performance and integrity of data. After receiving the integrated data, the embedded microcontroller 21 can quickly determine the power fluctuation amplitude, voltage over-limit or current abnormality, and trigger the subsequent control logic of the edge computing unit 2. The overall design provides high-precision input for the coordinated control of the power electronic converter 3 and the hybrid energy storage unit 4, while supporting the decision module 5 to adaptively optimize complex operating conditions, ultimately realizing efficient power stability regulation and improved dynamic response capability of new energy grid access.

[0032] Specifically, the FPGA chip 22 is connected to the embedded microcontroller 21 via a high-speed data bus, the control signal input terminal of the bidirectional converter 31 is connected to the output terminal of the FPGA chip 22, and the control signal input terminal of the static synchronous compensator 32 is also connected to the output terminal of the FPGA chip 22.

[0033] The advantages are that the FPGA chip 22 is connected to the embedded microcontroller 21 via a high-speed data bus, building an efficient data transmission bridge between the two, enabling the large amount of acquired data processed by the embedded microcontroller 21 to be quickly and accurately transmitted to the FPGA chip 22; the control signal input terminal of the bidirectional converter 31 is connected to the output terminal of the FPGA chip 22, allowing the FPGA chip 22 to precisely control the bidirectional converter 31, realizing the bidirectional flow of electrical energy between the energy storage unit and the grid, and regulating the power of new energy connected to the grid; the control signal input terminal of the static synchronous compensator 32 is also connected to the output terminal of the FPGA chip 22, enabling the FPGA chip 22 to control the static synchronous compensator 32 to perform reactive power compensation according to the grid conditions, stabilizing the grid voltage.

[0034] Specifically, the input terminal of the converter 44 is electrically connected to the lithium battery pack 41, the supercapacitor 42 and the flywheel energy storage device 43 respectively, the output terminal of the converter 44 is electrically connected to the DC side of the bidirectional converter 31, the power distribution switch 45 is connected in series between the DC bus of the lithium battery pack 41 and the supercapacitor 42, and the control terminal of the power distribution switch 45 is connected to the output terminal of the multi-core processor 51.

[0035] The advantages are that the lithium battery pack 41 has high energy density and long energy storage time, the supercapacitor 42 can charge and discharge quickly and has a fast response speed, and the flywheel energy storage device 43 has the advantages of high power density and long life. The converter 44 can convert and adapt the electrical energy of different energy storage devices, so that they can be connected to the grid with appropriate voltage, current and other parameters through the bidirectional converter 31, giving full play to the characteristics of various energy storage devices and improving the performance and stability of the entire energy storage system. The power distribution switch 45 is connected in series between the DC bus of the lithium battery pack 41 and the supercapacitor 42, and its control terminal is connected to the output terminal of the multi-core processor 51. The interconnectedness allows the system to flexibly adjust the power distribution between the lithium battery pack 41 and the supercapacitor 42 according to actual needs. The multi-core processor 51 can precisely control the on / off state and working status of the power distribution switch 45 based on the power fluctuations of new energy generation and the load demand of the power grid. For example, when the power of new energy generation suddenly increases, the power distribution switch 45 can be controlled to allow the supercapacitor 42 to quickly absorb excess energy. When a continuous and stable power supply is required, the power is then distributed to the lithium battery pack 41 for release, thereby optimizing the energy management of the energy storage system and improving the power stability and power quality of new energy connected to the power grid.

[0036] Specifically, the multi-core processor 51 interacts with the FPGA chip 22 through the network switch 61, and the two ends of the fiber optic ring network 62 are connected to the fiber optic interfaces of the multi-core processor 51 and the network switch 61, respectively.

[0037] The advantages are that after the FPGA chip 22 performs rapid calculations based on the collected power grid electrical parameters, it can transmit the relevant data to the multi-core processor 51 in a timely manner via the network switch 61. The multi-core processor 51 can then perform more complex analysis and decisions based on this data, such as formulating a better power allocation strategy. At the same time, the two ends of the fiber optic ring network 62 are connected to the fiber optic interfaces of the multi-core processor 51 and the network switch 61, respectively. The fiber optic ring network 62 has advantages such as high bandwidth, low loss, and strong anti-interference ability, providing a high-speed and reliable channel for data transmission between the multi-core processor 51 and the network switch 61.

[0038] Specifically, the AC side of the bidirectional converter 31 is connected to the grid bus via a filter reactor, the static synchronous compensator 32 is directly connected in parallel to the grid bus via a connecting cable, and an overcurrent protection circuit is provided between the hybrid energy storage unit 4 and the bidirectional converter 31.

[0039] The advantages are that the AC side of the bidirectional converter 31 is connected to the grid bus via a filter reactor, which filters the AC output of the bidirectional converter 31, reducing harmonic components and making the power flowing into the grid cleaner, while also reducing interference to other equipment in the grid; the static synchronous compensator 32 is directly connected in parallel to the grid bus via a connecting cable, which can quickly respond to changes in the reactive power of the grid, adjust the reactive power in real time, stabilize the grid voltage, and enhance the stability and reliability of the grid; an overcurrent protection circuit is provided between the hybrid energy storage unit 4 and the bidirectional converter 31. When an overcurrent occurs in the circuit, the overcurrent protection circuit can act quickly, cut off the circuit or take other protective measures to prevent damage to the bidirectional converter 31 and the hybrid energy storage unit 4 due to excessive current, ensuring the safe operation of the equipment, and thus ensuring the continuous and reliable operation of the entire power stabilization and regulation device for new energy grid access.

[0040] In use, the current transformer 11, voltage sensor 12, and power analyzer 13 of the local sensor module 1 are electrically connected in sequence to collect real-time data on the output power of the new energy power generation unit, the charging and discharging current of the energy storage unit, and the frequency and voltage fluctuation data of the grid side. This data is then transmitted via wired connection to the embedded microcontroller 21. The embedded microcontroller 21 transmits the data to the FPGA chip 22 via a high-speed data bus. The FPGA chip 22 then sends control signals to the bidirectional converter 31 and the static synchronizing compensator 32. The bidirectional converter 31 connects to the hybrid energy storage unit 4 on its DC side and to the grid on its AC side via a filter reactor, achieving bidirectional energy conversion. The static synchronizing compensator 32... The step compensator 32 is directly connected in parallel to the grid bus for reactive power compensation; the lithium battery pack 41, supercapacitor 42 and flywheel energy storage device 43 in the hybrid energy storage unit 4 are connected to the bidirectional converter 31 through the converter 44; the power distribution switch 45, under the control of the multi-core processor 51, flexibly distributes the power of the lithium battery pack 41 and the supercapacitor 42; the multi-core processor 51 interacts with the FPGA chip 22 through the network switch 61, and the fiber optic ring network 62 ensures reliable data transmission; in addition, the overcurrent protection circuit between the hybrid energy storage unit 4 and the bidirectional converter 31 protects the equipment safety, and all parts work together to achieve stable regulation of the power of new energy access to the grid.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A power stabilization and regulation device for new energy grid connection, characterized in that: include, The local sensor module (1) is composed of a current transformer (11), a voltage sensor (12) and a power analyzer (13), and the local sensor module (1) is used to collect the output power of the new energy power generation unit, the charging and discharging current of the energy storage unit and the frequency and voltage fluctuation data of the grid side in real time. An edge computing unit (2) is composed of an embedded microcontroller (21) and an FPGA chip (22), and the edge computing unit (2) is used to receive data from the local sensor module (1); The power electronic converter (3) comprises a bidirectional converter (31) and a static synchronous compensator (32). The DC side of the bidirectional converter (31) is connected to the energy storage unit, and the AC side is coupled to the power grid. The static synchronous compensator (32) is connected in parallel with the power grid bus to perform reactive power compensation. The hybrid energy storage unit (4) comprises a lithium battery pack (41), a supercapacitor (42) and a flywheel energy storage device (43) connected in parallel. The lithium battery pack (41), the supercapacitor (42) and the flywheel energy storage device (43) are connected to the bidirectional converter (31) through an independent converter (44), and a power distribution switch (45) is provided between the DC bus of the lithium battery pack (41) and the supercapacitor (42). The decision module (5) includes a multi-core processor (51) and a real-time database (52), wherein the multi-core processor (51) is connected to the real-time database (52) via a data line; The communication module (6) consists of a network switch (61) and an optical fiber ring network (62). The network switch (61) is directly connected to the FPGA chip (22), and the optical fiber ring network (62) is coupled between the decision module (5) and the network switch (61).

2. The power stabilization and regulation device for new energy grid access according to claim 1, characterized in that: The current transformer (11), voltage sensor (12) and power analyzer (13) are electrically connected in sequence, and together they transmit the collected data to the embedded microcontroller (21) via wired transmission.

3. The power stabilization and regulation device for new energy grid access according to claim 1, characterized in that: The FPGA chip (22) is connected to the embedded microcontroller (21) via a high-speed data bus. The control signal input terminal of the bidirectional converter (31) is connected to the output terminal of the FPGA chip (22). The control signal input terminal of the static synchronous compensator (32) is also connected to the output terminal of the FPGA chip (22).

4. The power stabilization and regulation device for new energy grid access according to claim 1, characterized in that: The input terminal of the converter (44) is electrically connected to the lithium battery pack (41), the supercapacitor (42) and the flywheel energy storage device (43) respectively. The output terminal of the converter (44) is electrically connected to the DC side of the bidirectional converter (31). The power distribution switch (45) is connected in series between the DC bus of the lithium battery pack (41) and the supercapacitor (42), and the control terminal of the power distribution switch (45) is connected to the output terminal of the multi-core processor (51).

5. The power stabilization and regulation device for new energy grid access according to claim 1, characterized in that: The multi-core processor (51) interacts with the FPGA chip (22) through the network switch (61), and the two ends of the optical fiber ring network (62) are connected to the optical fiber interfaces of the multi-core processor (51) and the network switch (61), respectively.

6. The power stabilization and regulation device for new energy grid access according to claim 1, characterized in that: The bidirectional converter (31) is connected to the grid bus via a filter reactor on its AC side. The static synchronous compensator (32) is directly connected to the grid bus via a connecting cable. An overcurrent protection circuit is provided between the hybrid energy storage unit (4) and the bidirectional converter (31).

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