Substation operation management method and system based on super capacitor energy storage

Abstract

The invention discloses a transformer substation operation management method and system based on super capacitor energy storage, and the system comprises a super capacitor module disposed in a transformer substation, and also comprises a data collection unit, a state monitoring unit, an environment monitoring unit, a DC guarantee unit, an early warning unit and an energy management unit which are disposed in the transformer substation. The data acquisition unit is used for acquiring operation state data of a super capacitor module in the transformer substation, and the operation state data comprises voltage and current data; the state monitoring unit is used for monitoring equipment in the transformer substation in real time; the environment monitoring unit is used for monitoring environment parameters in the substation; the energy management unit is used for adjusting a charging and discharging strategy of the super capacitor module according to a load demand; the direct current guarantee unit is connected with a direct current bus of the transformer substation in parallel and used for charging when alternating current is normal, the direct current guarantee unit is not only used for supplying power to a load, but also used for supplementing electric energy for the super-capacitor module, and the scheme is used for improving the operation efficiency of the super-capacitor module.

Description

Technical Field

[0001] The present invention belongs to the technical field of substation operation management, and in particular relates to a substation operation management method and system based on supercapacitor energy storage. Background Art

[0002] Supercapacitor, also known as electrochemical capacitor, double-layer capacitor, golden capacitor or farad capacitor, is a new type of energy storage device between traditional capacitors and rechargeable batteries; supercapacitor refers to a new type of energy storage device between traditional capacitors and rechargeable batteries. It has both the characteristics of fast charging and discharging of capacitors and the energy storage characteristics of batteries. The working principle of supercapacitor is based on the principle of charge separation and electric field storage. It consists of two electrodes and electrolyte. When an external power supply is connected to the two electrodes of the supercapacitor, the positive electrode attracts negative charges and the negative electrode attracts positive charges, causing the ions in the electrolyte to begin to move toward the electrodes, forming charge separation. In this process, the ions in the electrolyte form a charge layer on the surface of the electrode, generating an electric field for storing electrical energy. When the electrical energy needs to be released, the external circuit connects the current to the two electrodes of the capacitor, the charge begins to flow out of the electrodes, and the ions in the electrolyte return to a uniformly distributed state, completing the discharge process.

[0003] Chinese invention patent CN118677093A discloses a method and system for operating and managing a DC power supply of a substation based on supercapacitor energy storage. The method includes: connecting a DC protection device based on supercapacitor energy storage in parallel to a DC bus; when AC power is supplied normally, the DC protection device supplies power to the load while replenishing the discharged electric energy to the supercapacitor; when AC power cannot be supplied normally, the DC protection module provides power supply demand for the DC bus; when the voltage of the supercapacitor cannot meet the requirements of the DC bus, the voltage of the supercapacitor is increased by a boost unit to meet the requirements of the DC bus; the scheme utilizes a DC protection device based on supercapacitor energy storage to realize uninterrupted and reliable DC power supply to the DC bus, thereby improving the safety and reliability of the operation of the DC system. The operation strategy efficiency of the operation management method of the scheme is not high.

[0004] Therefore, the present invention provides a substation operation management method and system based on supercapacitor energy storage to solve the problems raised by the above background technology. Summary of the invention

[0005] In view of the problems raised by the above background technology, the purpose of the present invention is to provide a substation operation management method and system based on supercapacitor energy storage, so as to improve the operating efficiency of the supercapacitor module.

[0006] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0007] A substation operation management method and system based on supercapacitor energy storage, comprising a supercapacitor module arranged in the substation, characterized in that: it also comprises a data acquisition unit, a state monitoring unit, an environment monitoring unit and a DC protection unit, an early warning unit and an energy management unit arranged in the substation;

[0008] The data acquisition unit is used to collect the operating status data of the supercapacitor module in the substation, and the operating status data includes voltage and current data;

[0009] The state monitoring unit is used to monitor the equipment in the substation in real time;

[0010] The environmental monitoring unit is used to monitor environmental parameters in the substation;

[0011] The energy management unit is used to adjust the charging and discharging strategy of the supercapacitor module according to load demand;

[0012] The DC protection unit is connected in parallel with the DC bus of the substation, and is used to charge when the AC power is normal, and provide power support when the AC power is interrupted. The DC protection unit is used not only to supply power to the load, but also to supplement power for the supercapacitor module;

[0013] The early warning unit is respectively connected to the data acquisition unit, the state monitoring unit, the environment monitoring unit and the energy management unit for communication.

[0014] It is further defined that the DC protection unit includes a charging unit, a capacitor module and a boost unit, the charging unit is used for charging and discharging, the capacitor module is used for storing current, and the boost unit is used for boosting voltage to meet the needs of the substation bus.

[0015] It is further defined that the equipment in the substation includes a transformer, a switchgear and a capacitor bank.

[0016] It is further defined that the environmental parameters within the substation include temperature and humidity data.

[0017] It is further defined that the supercapacitor module includes a plurality of supercapacitor cells, a circuit board and a housing;

[0018] Each of the plurality of supercapacitor cells has a capacitance value and an internal resistance;

[0019] A plurality of the supercapacitor monomers are connected in series or in parallel to form a supercapacitor series connection piece or a supercapacitor parallel connection piece, one end of the circuit board is connected to the supercapacitor parallel connection piece or the supercapacitor series connection piece, and the other end is connected to an external circuit;

[0020] The shell is the external structure of the supercapacitor module and is used to protect various components inside the supercapacitor module from damage by the external environment.

[0021] It is further defined that the supercapacitor module also includes a sealing cover, the shell is a sealed shell, and the sealing cover is connected to the opening part of the closed shell to prevent moisture and dust from entering the interior of the supercapacitor module.

[0022] It is further defined that the supercapacitor module also includes a balancing circuit, which is connected to the supercapacitor module and is used to monitor the voltage status of each supercapacitor cell in the supercapacitor module.

[0023] A substation operation management method based on supercapacitor energy storage comprises the following steps:

[0024] S1: installing a DC protection unit in the substation, and connecting the DC protection unit to the DC bus of the substation;

[0025] S2: Connect the supercapacitor module to the DC protection unit of the substation;

[0026] S3: When the AC power is supplied normally, the DC protection unit is used to supply power to the load and to supplement power to the supercapacitor module. When the AC power cannot be supplied normally, the DC protection unit starts to provide power to the DC bus of the substation;

[0027] S4: If the voltage of the supercapacitor module cannot meet the requirement of the DC bus, the boost unit will intervene to increase the voltage of the supercapacitor module;

[0028] S5: Setting a data acquisition unit to monitor the operation data of the supercapacitor module in real time, setting a status monitoring unit, the status monitoring unit is used to monitor the equipment in the substation in real time, and setting an environment monitoring unit, the environment monitoring unit is used to monitor the environmental parameters in the substation;

[0029] S6: Setting an early warning unit, the operation data of the supercapacitor module collected by the data acquisition unit is sent to the early warning unit, and the early warning unit is used to analyze the operation data;

[0030] S7: Setting an energy management unit, wherein the energy management unit is used to adjust the charging and discharging strategy of the supercapacitor module according to the load demand, specifically including: during the peak period of grid demand, the supercapacitor module discharges efficiently to supplement the power demand of the grid, and during the low period of grid demand or when there is excess power generation from renewable energy, the supercapacitor module is charged to store excess power.

[0031] It is further defined that the operating data of the supercapacitor module in S5 includes voltage, current and temperature data.

[0032] It is further defined that it also includes an optimized operation strategy unit, which is used to optimize the operation strategy of the supercapacitor module through simulation analysis and experimental verification.

[0033] Beneficial effects of the present invention:

[0034] The present solution provides a substation operation management method and system based on supercapacitor energy storage, which adjusts the charging and discharging strategy of the supercapacitor module according to load demand by setting an energy management unit. During the peak period of grid demand, the supercapacitor module discharges efficiently to supplement the power demand of the grid. During the low period of grid demand or when there is excess power generation from renewable energy, the supercapacitor module is charged to store excess power.

[0035] The data acquisition unit monitors the operating data of the supercapacitor module in real time, the early warning unit analyzes and warns the operating data, and the operation strategy optimization unit is used to optimize the operation strategy of the supercapacitor module through simulation analysis and experimental verification, thereby maximizing the potential of the energy storage system.

[0036] Then, by connecting the DC protection unit in parallel with the DC bus of the substation, it is used to charge when the AC power is normal and provide power support when the AC power is interrupted. The DC protection unit is not only used to supply power to the load, but also to supplement power for the supercapacitor module. This solution improves the overall operating efficiency of the supercapacitor energy storage substation by optimizing the operating strategy of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0038] Figure 1 A system module diagram of a substation operation management method and system embodiment based on supercapacitor energy storage according to the present invention;

[0039] Figure 2 The present invention is a flowchart of a method and system embodiment of substation operation management based on supercapacitor energy storage.

[0040] The main component symbols are described as follows:

[0041] A DC protection unit 9 , a supercapacitor module 10 , a data acquisition unit 101 , a state monitoring unit 102 , an environment monitoring unit 103 , an energy management unit 104 , and an early warning unit 105 . DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] like Figure 1 As shown, a substation operation management method and system based on supercapacitor energy storage of the present invention includes a supercapacitor module 10 arranged in the substation, characterized in that: it also includes a data acquisition unit 101, a state monitoring unit 102, an environment monitoring unit 103 and a DC protection unit 9, an early warning unit 105 and an energy management unit 104 arranged in the substation;

[0046] The data acquisition unit 101 is used to collect the operating status data of the supercapacitor module 10 in the substation, and the operating status data includes voltage and current data;

[0047] The state monitoring unit 102 is used to monitor the equipment in the substation in real time;

[0048] The environmental monitoring unit is used to monitor environmental parameters in the substation;

[0049] The energy management unit 104 is used to adjust the charging and discharging strategy of the supercapacitor module 10 according to load demand;

[0050] The DC protection unit 9 is connected in parallel with the DC bus of the substation, and is used for charging when the AC power is normal, and providing power support when the AC power is interrupted. The DC protection unit 9 is not only used to supply power to the load, but also used to supplement power for the supercapacitor module 10;

[0051] The early warning unit 105 is respectively connected to the data acquisition unit 101 , the state monitoring unit 102 , the environment monitoring unit and the energy management unit 104 in communication.

[0052] Preferably, the DC protection unit 9 includes a charging unit, a capacitor module and a boost unit, the charging unit is used for charging and discharging, the capacitor module is used for storing current, and the boost unit is used for boosting voltage to meet the needs of the substation bus.

[0053] In practical applications, the boost unit includes capacitor C1, inductor L1, resistor R1, diode D1 and gate drive chip. Capacitor C1 is a super capacitor, which plays the role of energy storage and boosting in the boost unit. It can store a large amount of energy in a relatively small volume and release it quickly when needed.

[0054] Inductor L1 is used to store and release energy in the boost unit, and works together with capacitor C1 to achieve the boost function; resistors are used in the boost unit to limit current, divide voltage, and provide stable voltage output; diode D1 is used as a unidirectional conductive element in the boost unit to ensure that current can only flow in one direction, thereby protecting other components in the circuit.

[0055] The connection of the above-mentioned boost unit is specifically as follows: one end of the capacitor C1 is grounded, and the other end is connected to the output end of the inductor L1, forming a part of the energy storage circuit; the input end of the inductor receives electric energy from the substation bus, and its output end is connected to the capacitor C1; the positive electrode of the diode D1 is connected to the output end of the inductor L1, and the negative electrode is connected to the capacitor C1; the input end of the gate drive chip receives a signal from the control circuit, and the output end is connected to the gate of the switching element.

[0056] Preferably, the equipment in the substation includes a transformer, a switchgear and a capacitor bank.

[0057] Preferably, the environmental parameters within the substation include temperature and humidity data.

[0058] Preferably, the supercapacitor module 10 includes a plurality of supercapacitor cells, a circuit board and a housing;

[0059] The plurality of supercapacitor cells each have a capacitance value and an internal resistance; these supercapacitor cells are combined in series or in parallel to meet specific capacitance and voltage requirements.

[0060] A plurality of the supercapacitor monomers are connected in series or in parallel to form a supercapacitor series connection piece or a supercapacitor parallel connection piece, one end of the circuit board is connected to the supercapacitor parallel connection piece or the supercapacitor series connection piece, and the other end is connected to an external circuit;

[0061] In practical applications, series connections can increase the voltage of the module, while parallel connections can increase the capacitance of the module. The circuit board plays a role in connection, control and protection in the supercapacitor module. It can connect each supercapacitor monomer and external circuit, and realize the monitoring and control of current and voltage. At the same time, the circuit board can also provide over-current, over-voltage and other protection functions to ensure the safe operation of the module.

[0062] The housing is the external structure of the supercapacitor module 10 and is used to protect various components inside the supercapacitor module 10 from being damaged by the external environment.

[0063] In practical applications, the housing is made of strong and durable materials, such as metal or plastic. The design of the housing also needs to consider the heat dissipation performance, so multiple heat dissipation holes are evenly opened on the outside of the housing. This hole design ensures that the module can effectively dissipate heat during operation.

[0064] Preferably, the supercapacitor module 10 further includes a sealing cover, the shell is a sealed shell, and the sealing cover is connected to an opening portion of the sealed shell to prevent moisture and dust from entering the interior of the supercapacitor module 10 .

[0065] In practical applications, the sealing cover provides a certain mechanical strength to enhance the overall structural stability of the supercapacitor module 10 .

[0066] Preferably, the supercapacitor module 10 further includes a balancing circuit, which is connected to the supercapacitor module 10 and is used to monitor the voltage state of each supercapacitor cell in the supercapacitor module 10. The balancing circuit is composed of a balancing capacitor and a switch array.

[0067] In practical applications, the balancing circuit can monitor the voltage status of each supercapacitor cell in the supercapacitor module 10 and perform energy transfer when necessary to eliminate the imbalance between cells and improve the overall performance and stability of the module.

[0068] A substation operation management method based on supercapacitor energy storage comprises the following steps:

[0069] S1: a DC protection unit 9 is provided in the substation, and the DC protection unit 9 is connected to the DC bus of the substation;

[0070] S2: Connect the supercapacitor module 10 to the DC protection unit 9 of the substation;

[0071] S3: When the AC power is supplied normally, the DC protection unit 9 is used to supply power to the load and to supplement the power for the super capacitor module 10. When the AC power cannot be supplied normally, the DC protection unit 9 starts to provide power for the DC bus of the substation;

[0072] S4: If the voltage of the supercapacitor module 10 cannot meet the requirement of the DC bus, the boost unit will intervene to increase the voltage of the supercapacitor module 10;

[0073] S5: Setting a data acquisition unit 101 to monitor the operation data of the supercapacitor module 10 in real time, setting a state monitoring unit 102, the state monitoring unit 102 is used to monitor the equipment in the substation in real time, and setting an environment monitoring unit, the environment monitoring unit is used to monitor the environmental parameters in the substation;

[0074] S6: Setting an early warning unit 105, the operation data of the super capacitor module 10 collected by the data collection unit 101 is sent to the early warning unit 105, and the early warning unit 105 is used to analyze the operation data;

[0075] S7: An energy management unit 104 is set, and the energy management unit 104 is used to adjust the charging and discharging strategy of the supercapacitor module 10 according to the load demand, specifically including: during the peak period of grid demand, the supercapacitor module 10 performs efficient discharge to supplement the power demand of the grid, and during the low period of grid demand or when there is excess power generation from renewable energy, the supercapacitor module 10 is charged to store excess power.

[0076] Preferably, the operating data of the supercapacitor module 10 in S5 includes voltage, current and temperature data.

[0077] Preferably, it also includes an operation strategy optimization unit, which is used to optimize the operation strategy of the supercapacitor module 10 through simulation analysis and experimental verification.

[0078] This solution adjusts the charging and discharging strategy of the supercapacitor module 10 according to the load demand by setting the energy management unit 104. During the peak period of grid demand, the supercapacitor module 10 discharges efficiently to supplement the power demand of the grid. During the low period of grid demand or when there is excess power generation from renewable energy, the supercapacitor module 10 is charged to store excess power.

[0079] The data acquisition unit 101 monitors the operation data of the supercapacitor module 10 in real time, the early warning unit 105 analyzes and warns the operation data, and then the operation strategy optimization unit is used to optimize the operation strategy of the supercapacitor module through simulation analysis and experimental verification, so as to maximize the potential of the energy storage system.

[0080] Then, by connecting the DC protection unit 9 in parallel with the DC bus of the substation, it is used for charging when the AC power is normal and providing power support when the AC power is interrupted. The DC protection unit 9 is not only used to supply power to the load, but also used to supplement electric energy for the supercapacitor module 10. This solution improves the overall operating efficiency of the supercapacitor energy storage substation by optimizing the operating strategy of the energy storage system.

[0081] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A substation operation management system based on supercapacitor energy storage, comprising a supercapacitor module (10) arranged in the substation, characterized in that: It also includes a data acquisition unit (101), a state monitoring unit (102), an environment monitoring unit (103), a DC protection unit (9), an early warning unit (105), and an energy management unit (104) arranged in the substation; The data acquisition unit (101) is used to collect operating status data of the supercapacitor module (10) in the substation, wherein the operating status data includes voltage and current data; The state monitoring unit (102) is used to perform real-time monitoring of equipment in the substation; The environmental monitoring unit is used to monitor environmental parameters in the substation; The energy management unit (104) is used to adjust the charging and discharging strategy of the supercapacitor module (10) according to load demand; The DC protection unit (9) is connected in parallel with the DC busbar of the transformer substation and is used for charging when the AC power is normal and providing power support when the AC power is interrupted. The DC protection unit (9) is used not only to supply power to the load but also to supplement electric energy for the super capacitor module (10); The early warning unit (105) is respectively connected to the data collection unit (101), the state monitoring unit (102), the environment monitoring unit and the energy management unit (104) in communication.

2. A substation operation management system based on supercapacitor energy storage according to claim 1, characterized in that: The DC protection unit (9) comprises a charging unit, a capacitor module and a boost unit, wherein the charging unit is used for charging and discharging, the capacitor module is used for storing current, and the boost unit is used for boosting voltage to meet the needs of the substation bus.

3. A substation operation management system based on supercapacitor energy storage according to claim 1, characterized in that: The equipment in the substation includes transformers, switchgear and capacitor banks.

4. A substation operation management system based on supercapacitor energy storage according to claim 1, characterized in that: The environmental parameters in the substation include temperature and humidity data.

5. A substation operation management system based on supercapacitor energy storage according to claim 1, characterized in that: The supercapacitor module (10) comprises a plurality of supercapacitor cells, a circuit board and a housing; Each of the plurality of supercapacitor cells has a capacitance value and an internal resistance; A plurality of the supercapacitor monomers are connected in series or in parallel to form a supercapacitor series connection piece or a supercapacitor parallel connection piece, one end of the circuit board is connected to the supercapacitor parallel connection piece or the supercapacitor series connection piece, and the other end is connected to an external circuit; The shell is the external structure of the supercapacitor module (10) and is used to protect various components inside the supercapacitor module (10) from damage by the external environment.

6. A substation operation management system based on supercapacitor energy storage according to claim 5, characterized in that: The supercapacitor module (10) further comprises a sealing cover, the shell is a sealed shell, and the sealing cover is connected to the opening portion of the sealed shell to prevent moisture and dust from entering the interior of the supercapacitor module (10).

7. A substation operation management system based on supercapacitor energy storage according to claim 5, characterized in that: The supercapacitor module (10) further comprises a balancing circuit, which is connected to the supercapacitor module (10) and is used to monitor the voltage state of each supercapacitor cell in the supercapacitor module (10).

8. A substation operation management method based on supercapacitor energy storage, characterized in that: The steps include: S1: a DC protection unit (9) is arranged in the substation, and the DC protection unit (9) is connected to a DC busbar of the substation; S2: Connecting the supercapacitor module (10) to the DC protection unit (9) of the substation; S3: When the AC power is supplied normally, the DC protection unit (9) is used to supply power to the load and to supplement electric energy for the super capacitor module (10); when the AC power cannot be supplied normally, the DC protection unit (9) is started to provide electric energy for the DC bus of the substation; S4: If the voltage of the supercapacitor module (10) cannot meet the requirements of the DC bus, the boost unit will intervene to increase the voltage of the supercapacitor module (10); S5: setting a data acquisition unit (101) to monitor the operation data of the supercapacitor module (10) in real time, setting a status monitoring unit (102), the status monitoring unit (102) being used to monitor the equipment in the substation in real time, and setting an environment monitoring unit, the environment monitoring unit being used to monitor the environmental parameters in the substation; S6: setting an early warning unit (105), wherein the operation data of the supercapacitor module (10) collected by the data collection unit (101) is sent to the early warning unit (105), and the early warning unit (105) is used to analyze the operation data; S7: An energy management unit (104) is provided, wherein the energy management unit (104) is used to adjust the charging and discharging strategy of the supercapacitor module (10) according to load demand, specifically including: during the peak period of grid demand, the supercapacitor module (10) performs high-efficiency discharge to supplement the power demand of the grid, and during the low period of grid demand or when there is excess power generation from renewable energy, the supercapacitor module (10) is charged to store excess power.

9. A substation operation management method based on supercapacitor energy storage according to claim 8, characterized in that: The operating data of the supercapacitor module (10) in S5 includes voltage, current and temperature data.

10. A substation operation management method based on supercapacitor energy storage according to claim 8, characterized in that: It also includes an optimized operation strategy unit, which is used to optimize the operation strategy of the supercapacitor module (10) through simulation analysis and experimental verification.

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