Thermal safety management method, system, medium and equipment for energy storage power station

Abstract

The invention discloses a thermal safety management method and system for an energy storage power station, a medium and equipment. The thermal safety management method comprises the steps that a refrigeration target is obtained; according to the refrigeration target, PID parameters corresponding to the refrigeration target are obtained; according to the PID parameters, the target compression frequency of the compressor is determined; and driving the compressor to refrigerate according to the target compression frequency. According to the method, P, I and D in the PID algorithm can be adaptively adjusted according to different refrigeration targets, compared with a traditional fixed parameter type temperature control strategy, the advantages of improving the refrigeration efficiency and being free of maintenance are achieved, and the refrigeration efficiency and environment adaptability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal safety management of energy storage power stations, and in particular to a thermal safety management method, system, medium and equipment for energy storage power stations. Background Art

[0002] The thermal safety management system is a system that regulates the temperature generated by the battery charging and discharging in the energy storage station. Most existing thermal safety management systems regulate temperature based on the PID control algorithm, but there are some limitations, such as weak adaptability to the dynamic characteristics of the system and insufficient anti-interference. Summary of the invention

[0003] In order to solve the technical problems existing in the background technology, the present invention proposes a thermal safety management method, system, medium and equipment for an energy storage power station.

[0004] The present invention proposes a thermal safety management method for an energy storage power station, comprising:

[0005] Obtaining a cooling target; wherein the cooling target includes a cooling target temperature and a preset cooling time;

[0006] According to the cooling target, a PID parameter corresponding to the cooling target is obtained;

[0007] According to the PID parameters, the target compression frequency of the compressor is determined;

[0008] The compressor is driven to perform cooling according to the target compression frequency.

[0009] Preferably, according to the refrigeration target, a PID parameter corresponding to the refrigeration target is obtained, specifically including:

[0010] S1, initialize PID parameters;

[0011] S2. Determine the target compression frequency of the compressor according to the PID parameters;

[0012] S3, obtaining the temperature of the energy storage power station in real time;

[0013] S4. When the temperature of the energy storage power station is greater than the cooling target temperature, the compressor is driven to start cooling according to the target compression frequency of the compressor;

[0014] When the temperature of the energy storage power station stabilizes at the cooling target temperature, the cooling is stopped, and the actual cooling time from the start of cooling to the stop of cooling and the temperature data of the energy storage power station are obtained;

[0015] S5. Update PID parameters according to the actual cooling time and the temperature data of the energy storage power station;

[0016] S6. Repeat S2-S5 until the actual cooling time meets the preset cooling time and the temperature data of the energy storage power station meets the preset cooling conditions, and use the updated PID parameters as the PID parameters under the cooling target.

[0017] The preset cooling condition is that the cooling amplitude of the energy storage power station during the actual cooling time meets the preset range and its temperature-time curve is smooth.

[0018] Preferably, in S5, the PID parameters are updated according to the actual cooling time and the temperature data of the energy storage power station, specifically including:

[0019] Compare the actual cooling time with the preset cooling time;

[0020] When the actual cooling time is greater than the preset cooling time, increase the P value in the PID parameter;

[0021] When the actual cooling time is less than the preset cooling time, the P value in the PID parameter is adjusted to a smaller value;

[0022] When the actual cooling time is equal to the preset cooling time, the cooling speed is obtained according to the temperature data of the energy storage power station, and the cooling speed is compared with the preset range;

[0023] If the cooling speed is higher than the preset range, the I value in the PID parameter is adjusted to a smaller value;

[0024] If the cooling speed is lower than the preset range, increase the I value in the PID parameter;

[0025] If the cooling speed is within the preset range, a temperature-time curve is generated based on the temperature data of the energy storage power station;

[0026] Determine whether the temperature-time curve is smooth;

[0027] If not, the P, I and D in the PID parameters are scaled as a whole.

[0028] The present invention also proposes a thermal safety management system for an energy storage power station, comprising:

[0029] An acquisition module, used for acquiring a cooling target;

[0030] A control module, used for obtaining a PID parameter corresponding to the cooling target according to the cooling target;

[0031] According to the PID parameters, the target compression frequency of the compressor is determined;

[0032] The compressor is driven to perform cooling according to the target compression frequency.

[0033] The present invention also proposes a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the thermal safety management method for an energy storage power station as described in any one of the above is implemented.

[0034] The present invention also proposes an electronic device, comprising: a processor and a memory, the memory being used to store one or more programs; when the one or more programs are executed by the processor, the thermal safety management method for an energy storage power station as described in any one of the above is implemented.

[0035] In the present invention, the proposed thermal safety management method, system, medium and equipment for energy storage power station first obtain the PID parameters corresponding to the refrigeration target according to the refrigeration target; determine the target compression frequency of the compressor according to the PID parameters; and drive the compressor to perform refrigeration according to the target compression frequency. The present invention can adaptively adjust P, I and D in the PID algorithm for different refrigeration targets (i.e. different application scenarios), solves the problem of relatively traditional fixed parameter temperature control strategy, improves the advantages of refrigeration efficiency and maintenance-free, and improves refrigeration efficiency and environmental adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic flow chart of a thermal safety management method for an energy storage power station in one embodiment of the present invention.

[0037] Figure 2 FIG. 1 is a temperature-time curve in one embodiment of the present invention.

[0038] Figure 3 This is a temperature-time curve in another embodiment of the present invention.

[0039] Figure 4 This is a temperature-time curve in another embodiment of the present invention. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] Reference Figure 1 The present invention proposes a thermal safety management method for an energy storage power station, comprising:

[0042] Obtaining a cooling target; wherein the cooling target includes a cooling target temperature and a preset cooling time;

[0043] According to the cooling target, a PID parameter corresponding to the cooling target is obtained;

[0044] According to the PID parameters, the target compression frequency of the compressor is determined;

[0045] The compressor is driven to perform cooling according to the target compression frequency.

[0046] When the present invention is implemented, firstly, according to the refrigeration target, a PID parameter corresponding to the refrigeration target is obtained; according to the PID parameter, a target compression frequency of the compressor is determined; and according to the target compression frequency, the compressor is driven to perform refrigeration. The present invention can adaptively determine the target compression power of the compressor for different refrigeration targets, effectively improve the refrigeration effect, and improve the adaptability to the dynamic characteristics of the energy storage power station.

[0047] In a further embodiment, according to the cooling target, a PID parameter corresponding to the cooling target is obtained, specifically including:

[0048] S1, initialize PID parameters;

[0049] S2. Determine the target compression frequency of the compressor according to the PID parameters;

[0050] S3, obtaining the temperature of the energy storage power station in real time;

[0051] S4. When the temperature of the energy storage power station is greater than the cooling target temperature, the compressor is driven to start cooling according to the target compression frequency of the compressor;

[0052] When the temperature of the energy storage power station stabilizes at the cooling target temperature, the cooling is stopped, and the actual cooling time from the start of cooling to the stop of cooling and the temperature data of the energy storage power station are obtained;

[0053] S5. Update PID parameters according to the actual cooling time and the temperature data of the energy storage power station;

[0054] S6. Repeat S2-S5 until the actual cooling time meets the preset cooling time and the temperature data of the energy storage power station meets the preset cooling conditions, and use the updated PID parameters as the PID parameters under the cooling target.

[0055] The preset cooling condition is that the cooling amplitude of the energy storage power station during the actual cooling time meets the preset range and its temperature-time curve is smooth.

[0056] In this embodiment, the PID parameters are adaptively adjusted according to the cooling target of the energy storage power station (i.e., different application scenarios), so as to adaptively determine the target compression power of the compressor corresponding to the cooling target of the energy storage power station; and the adjustment of the PID parameters is combined with the adjustment of factors such as machine aging, ambient temperature difference and user target value, which solves the problem of relatively traditional fixed parameter temperature control strategy, improves the cooling efficiency and maintenance-free advantages, and improves the cooling efficiency and environmental adaptability.

[0057] Of course, the cooling target temperature in this embodiment is a range value.

[0058] In order to be able to adaptively adjust the PID parameters according to the cooling target of the energy storage power station, in a further embodiment, in S5, the PID parameters are updated according to the actual cooling time and the temperature data of the energy storage power station, specifically including:

[0059] Compare the actual cooling time with the preset cooling time;

[0060] When the actual cooling time is greater than the preset cooling time, increase the P value in the PID parameter;

[0061] When the actual cooling time is less than the preset cooling time, the P value in the PID parameter is adjusted to a smaller value;

[0062] When the actual cooling time is equal to the preset cooling time, the cooling speed is obtained according to the temperature data of the energy storage power station, and the cooling speed is compared with the preset range;

[0063] If the cooling speed is higher than the preset range, the I value in the PID parameter is adjusted to a smaller value;

[0064] If the cooling speed is lower than the preset range, increase the I value in the PID parameter;

[0065] If the cooling speed is within the preset range, a temperature-time curve is generated based on the temperature data of the energy storage power station;

[0066] Determine whether the temperature-time curve is smooth;

[0067] If not, the P, I and D in the PID parameters are scaled as a whole.

[0068] This embodiment is configured so that the PID parameters can be adaptively adjusted according to the refrigeration target, and is more robust and adaptable to different refrigeration systems, and is also suitable for refrigeration systems with performance degradation, and does not require a large amount of manpower and time costs when performing automatic PID parameter correction.

[0069] It should be noted that in the process of adjusting the PID parameters, the larger the coefficient P, the faster the cooling speed, and the higher the oscillation speed of the refrigeration system; the larger the coefficient I, the faster the cooling rise speed, and the more oscillation times; the larger the coefficient D, the faster the reaction time of the refrigeration system, and the slower the temperature rise rate.

[0070] Among the three parameters of PID parameters, P should be adjusted first, because this parameter directly determines the performance of the compressor. A rising speed that is too fast will affect the service life of the compressor, so the P parameter should be determined first. The I parameter determines the cooling speed of the compressor. This is the second parameter that should be considered under the premise of ensuring system safety, in order to maximize the performance of the refrigerator and meet customer requirements. The D parameter should be considered last. This parameter determines the smoothness of the temperature of the thermal safety system. The smoother the system cooling, the better the temperature-time curve.

[0071] The present invention also proposes a thermal safety management system for an energy storage power station, comprising:

[0072] An acquisition module, used for acquiring a cooling target;

[0073] A control module, used for obtaining a PID parameter corresponding to the cooling target according to the cooling target;

[0074] According to the PID parameters, the target compression frequency of the compressor is determined;

[0075] The compressor is driven to perform cooling according to the target compression frequency.

[0076] In this embodiment, a temperature acquisition module for acquiring the temperature of the energy storage power station is also included;

[0077] The process of obtaining the PID parameters corresponding to the cooling target according to the cooling target specifically includes:

[0078] S1, initialize PID parameters;

[0079] S2. Determine the target compression frequency of the compressor according to the PID parameters;

[0080] S3, obtaining the temperature of the energy storage power station in real time;

[0081] S4. When the temperature of the energy storage power station is greater than the cooling target temperature, the compressor is driven to start cooling according to the target compression frequency of the compressor;

[0082] When the temperature of the energy storage power station stabilizes at the cooling target temperature, the cooling is stopped, and the actual cooling time from the start of cooling to the stop of cooling and the temperature data of the energy storage power station are obtained;

[0083] S5. Update PID parameters according to the actual cooling time and the temperature data of the energy storage power station;

[0084] S6. Repeat S2-S5 until the actual cooling time meets the preset cooling time and the temperature data of the energy storage power station meets the preset cooling conditions, and use the updated PID parameters as the PID parameters under the cooling target.

[0085] The preset cooling condition is that the cooling amplitude of the energy storage power station during the actual cooling time meets the preset range and its temperature-time curve is smooth.

[0086] In S5, the PID parameters are updated according to the actual cooling time and the temperature data of the energy storage power station, including:

[0087] Compare the actual cooling time with the preset cooling time;

[0088] When the actual cooling time is greater than the preset cooling time, increase the P value in the PID parameter;

[0089] When the actual cooling time is less than the preset cooling time, the P value in the PID parameter is adjusted to a smaller value; the maximum value is adjusted;

[0090] When the actual cooling time is equal to the preset cooling time, the cooling speed is obtained according to the temperature data of the energy storage power station, and the cooling speed is compared with the preset range;

[0091] If the cooling speed is higher than the preset range, the I value in the PID parameter is adjusted to a smaller value;

[0092] If the cooling speed is lower than the preset range, increase the I value in the PID parameter;

[0093] If the cooling speed is within the preset range, a temperature-time curve is generated based on the temperature data of the energy storage power station;

[0094] Determine whether the temperature-time curve is smooth;

[0095] If not, the P, I and D in the PID parameters are scaled as a whole.

[0096] The present invention also proposes a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the thermal safety management method for an energy storage power station as described in any one of the above.

[0097] The present invention also proposes an electronic device, characterized in that it includes: a processor and a memory, the memory is used to store one or more programs; when the one or more programs are executed by the processor, the thermal safety management method of the energy storage power station as described in any one of the above is implemented.

[0098] The effects of the present invention can be further illustrated by the following examples.

[0099] Example 1

[0100] The cooling target in this embodiment is: the cooling target temperature is 50° C., and the preset cooling time is 200 s.

[0101] In order to obtain the PID parameters corresponding to the cooling target, this embodiment sets the initial PID parameters; wherein, P=10, I=10, D=10; then, heating is performed by discharging or other heating facilities to obtain the temperature of the energy storage power station in real time, and when the temperature of the energy storage power station is greater than 50°C, cooling is performed according to the target compression frequency corresponding to the PID parameters. The temperature-time curve of the energy storage power station is as follows: Figure 2 shown.

[0102] from Figure 2 It can be seen that the cooling time meets the preset cooling time, but the vibration speed (the speed at which the curve drops and rises) is too fast.

[0103] Therefore, the row I parameter is reduced by 10 times, that is, the updated PID is: P = 10, I = 1, D = 10; then, the temperature of the energy storage power station is obtained in real time through discharge or other heating facilities, and when the temperature of the energy storage power station is greater than 50°C, cooling is performed according to the target compression frequency corresponding to the PID parameter. The temperature-time curve of the energy storage power station is as follows: Figure 3 shown.

[0104] from Figure 3 It can be seen that the cooling time meets the preset cooling time, but there is obvious over-regulation (the cusp in the curve is too high), that is, it meets the regulation requirements, but the curve is not smooth and has cusps.

[0105] Therefore, the PID parameters are scaled by the overall coefficient to achieve the purpose of smoothing, that is, the updated PID parameters are: P = 1, I = 0.1, D = 1; then, the temperature of the energy storage power station is obtained in real time through discharge or other heating facilities, and when the temperature of the energy storage power station is greater than 50°C, cooling is performed according to the target compression frequency corresponding to the PID parameters. The temperature-time curve of the energy storage power station is as follows: Figure 4 shown.

[0106] from Figure 4 It can be seen that the refrigeration time meets the preset refrigeration time, the temperature-time curve is smooth, and the temperature-time curve changes steadily.

[0107] Therefore, the PID parameters (P=1, I=0.1, D=1) are used as the PID parameters corresponding to the cooling target.

[0108] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A thermal safety management method for an energy storage power station, characterized in that: include: Obtaining a cooling target; wherein the cooling target includes: a cooling target temperature and a preset cooling time; According to the cooling target, a PID parameter corresponding to the cooling target is obtained; According to the PID parameters, the target compression frequency of the compressor is determined; The compressor is driven to perform cooling according to the target compression frequency.

2. The thermal safety management method for energy storage power station according to claim 1, characterized in that: According to the cooling target, the PID parameters corresponding to the cooling target are obtained, including: S1, initialize PID parameters; S2. Determine the target compression frequency of the compressor according to the PID parameters; S3, obtaining the temperature of the energy storage power station in real time; S4. When the temperature of the energy storage power station is greater than the cooling target temperature, the compressor is driven to start cooling according to the target compression frequency of the compressor; When the temperature of the energy storage power station stabilizes at the cooling target temperature, the cooling is stopped, and the actual cooling time from the start of cooling to the stop of cooling and the temperature data of the energy storage power station are obtained; S5. Update PID parameters according to the actual cooling time and the temperature data of the energy storage power station; S6. Repeat S2-S5 until the actual cooling time meets the preset cooling time and the temperature data of the energy storage power station meets the preset cooling conditions, and use the updated PID parameters as the PID parameters under the cooling target; The preset cooling condition is that the cooling amplitude of the energy storage power station during the actual cooling time meets the preset range and its temperature-time curve is smooth.

3. The thermal safety management method for energy storage power station according to claim 2, characterized in that: In S5, the PID parameters are updated according to the actual cooling time and the temperature data of the energy storage power station, including: Compare the actual cooling time with the preset cooling time; When the actual cooling time is greater than the preset cooling time, increase the P value in the PID parameter; When the actual cooling time is less than the preset cooling time, the P value in the PID parameter is adjusted to a smaller value; the maximum value is adjusted; When the actual cooling time is equal to the preset cooling time, the cooling speed is obtained according to the temperature data of the energy storage power station, and the cooling speed is compared with the preset range; If the cooling speed is higher than the preset range, the I value in the PID parameter is adjusted to a smaller value; If the cooling speed is lower than the preset range, increase the I value in the PID parameter; If the cooling speed is within the preset range, a temperature-time curve is generated based on the temperature data of the energy storage power station; Determine whether the temperature-time curve is smooth; If not, the P, I and D in the PID parameters are scaled as a whole.

4. A thermal safety management system for an energy storage power station, characterized in that: include: An acquisition module, used for acquiring a cooling target; A control module, used for obtaining a PID parameter corresponding to the cooling target according to the cooling target; According to the PID parameters, the target compression frequency of the compressor is determined; The compressor is driven to perform cooling according to the target compression frequency.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the thermal safety management method for an energy storage power station as described in any one of claims 1 to 3 is implemented.

6. An electronic device, characterized in that: include: A processor and a memory, the memory being used to store one or more programs; When one or more programs are executed by a processor, the thermal safety management method for an energy storage power station as described in any one of claims 1 to 3 is implemented.

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