Transformer regulation and control method and device and electronic equipment

Abstract

The embodiment of the invention discloses a transformer regulation and control method and device and electronic equipment, the method is applied to a server of a transformer regulation and control system, and the transformer regulation and control system further comprises a transformer and a cooling module; the method comprises the following steps: acquiring first electric heating data of a transformer in a current acquisition period and second electric heating data of the transformer in a previous acquisition period; according to the first electric heating data and the second electric heating data, the temperature change index of the transformer in the next collection period is predicted, and the temperature change index is used for indicating whether the temperature of the transformer in the next collection period rises or not; acquiring a safe operation temperature threshold value of the transformer; and regulating and controlling a cooling module according to the temperature change index, the temperature of the transformer in the current collection period and a safe operation temperature threshold, so as to cool the transformer through the cooling module. By adopting the embodiment of the invention, the transformer can be regulated and controlled before the fault evolution, the fault evolution process is prevented, and the operation efficiency of a power system is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer regulation, and particularly to a transformer regulation method, device and electronic equipment. Background Art

[0002] As an important device in the power system, the operating state of a transformer directly affects the stability and reliability of the entire system. At present, in order to ensure the safe and stable operation of the transformer, relay protection equipment is configured for it. Configuring relay protection can ensure that when a fault occurs in the transformer, the faulty part can be quickly cut off, preventing the short-circuit current from burning out the transformer or affecting its lifespan.

[0003] However, relay protection can only act on fault cutting, that is, cutting off the circuit after a fault occurs, which reduces the operating efficiency of the power system. Summary of the Invention

[0004] In order to solve the above problems, embodiments of the present invention provide a transformer regulation method, device and electronic equipment, which can perform transformer regulation before the evolution of a fault, prevent the process of fault evolution, and thus improve the operating efficiency of the power system.

[0005] In a first aspect, an embodiment of the present invention provides a transformer regulation method, which is applied to a server of a transformer regulation system. The transformer regulation system further includes a transformer and a cooling module; the method includes:

[0006] Obtain first electrothermal data of the transformer in the current acquisition period and second electrothermal data of the previous acquisition period;

[0007] According to the first electrothermal data and the second electrothermal data, predict a temperature change index of the transformer in the next acquisition period, where the temperature change index is used to indicate whether the temperature of the transformer will rise in the next acquisition period;

[0008] Obtain the safe operating temperature threshold of the transformer;

[0009] According to the temperature change index, the temperature of the transformer in the current acquisition period and the safe operating temperature threshold, regulate the cooling module to dissipate heat from the transformer through the cooling module.

[0010] In a second aspect, an embodiment of the present invention provides a transformer regulation device, which is applied to a server of a transformer regulation system. The transformer regulation system further includes a transformer and a cooling module; the device includes an acquisition unit and a processing unit;

[0011] The acquisition unit is used to obtain first electrothermal data of the transformer in the current acquisition period and second electrothermal data of the previous acquisition period;

[0012] The processing unit is configured to predict a temperature change index of the transformer in the next acquisition period according to the first electrothermal data and the second electrothermal data, where the temperature change index is used to indicate whether the temperature of the transformer will rise in the next acquisition period;

[0013] Obtain the safe operating temperature threshold of the transformer;

[0014] Regulate the cooling module according to the temperature change index, the temperature of the transformer in the current acquisition period, and the safe operating temperature threshold, so as to dissipate heat from the transformer through the cooling module.

[0015] In a third aspect, an embodiment of the present invention provides an electronic device, which includes a processor and a memory. The processor is connected to the memory. The memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the electronic device executes the method described in the first aspect.

[0016] Implementing the embodiments of the present application has the following beneficial effects:

[0017] In the implementation manner of the present application, first obtain the first electrothermal data of the transformer in the current acquisition period and the second electrothermal data of the previous acquisition period. Then, according to the first electrothermal data and the second electrothermal data, predict the temperature change index of the transformer in the next acquisition period, where the temperature change index is used to indicate whether the temperature of the transformer will rise in the next acquisition period. Next, obtain the safe operating temperature threshold of the transformer. Finally, regulate the cooling module according to the temperature change index, the temperature of the transformer in the current acquisition period, and the safe operating temperature threshold, so as to dissipate heat from the transformer through the cooling module. Thus, by predicting the temperature change index of the transformer in the next acquisition period and regulating the cooling module according to the temperature change index to dissipate heat from the transformer, the process of fault evolution can be blocked before the fault evolves, thereby improving the operating efficiency of the power system. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background art, the following will describe the drawings required to be used in the embodiments of the present invention or the background art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of the architecture of a transformer regulation system provided by an embodiment of the present application;

[0020] Figure 2It is a unit structure diagram of a transformer regulation method provided by an embodiment of the present application;

[0021] Figure 3 It is a flowchart of a transformer regulation method provided by an embodiment of the present application;

[0022] Figure 4 It is a schematic diagram of a target temperature change curve provided by an embodiment of the present application;

[0023] Figure 5 It is a schematic diagram of a reference slope and a measured slope provided by an embodiment of the present application;

[0024] Figure 6 It is a regulation flowchart based on a cooling module and a host computer provided by an embodiment of the present application;

[0025] Figure 7 It is a schematic structural diagram of a transformer regulation device provided by an embodiment of the present application;

[0026] Figure 8 It is a schematic structural diagram of an electronic device provided by an embodiment of the present application. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments in the present application belong to the scope of protection of the present application.

[0028] The terms "first", "second", "third", and "fourth", etc. in the specification and claims of the present application and the accompanying drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or modules is not limited to the listed steps or modules, but optionally further includes steps or modules that are not listed, or optionally further includes other steps or modules inherent to these processes, methods, products, or devices.

[0029] Referring to "embodiment" herein means that a specific feature, result, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0030] Refer to Figure 1 , Figure 1 which is a schematic structural diagram of a transformer regulation system provided by an embodiment of the present application. As shown in Figure 1 , an embodiment of the present application provides a transformer regulation method, which is applied to a server of a transformer regulation system. The transformer regulation system further includes a transformer and a cooling module. The server collects data from the transformer and controls the cooling module to dissipate heat from the transformer. Refer to Figure 2 , Figure 2 which is a unit structure diagram of a transformer regulation method provided by an embodiment of the present application. The transformer regulation system can implement functions such as Figure 2 shown in electric - heat data collection, thermal evolution analysis, and operating parameter regulation

[0031] Refer to Figure 3 , Figure 3 which is a flowchart of a transformer regulation method provided by an embodiment of the present application. As shown in Figure 3 , the transformer regulation method provided by an embodiment of the present application includes but is not limited to the following steps:

[0032] Step S101: Obtain first electric - heat data of the transformer in the current collection period and second electric - heat data of the previous collection period;

[0033] Step S102: Predict the temperature change index of the transformer in the next collection period according to the first electric - heat data and the second electric - heat data;

[0034] wherein, the temperature change index is used to indicate whether the temperature of the transformer will rise in the next collection period;

[0035] Step S103: Obtain the safe operating temperature threshold of the transformer;

[0036] Step S104: Regulate the cooling module according to the temperature change index, the temperature of the transformer in the current collection period, and the safe operating temperature threshold, so as to dissipate heat from the transformer through the cooling module.

[0037] In a possible embodiment, the first electric - heat data of the transformer in the current collection period and the second electric - heat data of the previous collection period are obtained through electric - heat sensors. The electric - heat sensors include temperature sensors and electrical collection devices. The first electric - heat data includes first electrical data and first thermal data, and the second electric - heat data includes second electrical data and second thermal data. The first electrical data and the second electrical data include but are not limited to the input voltage, output voltage, input current, output current, and power factor of the transformer. The first thermal data and the second thermal data include but are not limited to the transformer winding temperature, transformer core temperature, and temperature of the environment where the transformer is located.

[0038] In a possible embodiment, the time lengths of the current acquisition period, the previous acquisition period, and the next acquisition period are the same, all being a unit time.

[0039] In a possible embodiment, based on the first electro-thermal data and the second electro-thermal data, a temperature change index of the transformer in the next acquisition period is predicted, where the temperature change index is used to indicate whether the temperature of the transformer will rise in the next acquisition period. When predicting the temperature change index of the transformer in the next acquisition period, first, thermal evolution analysis is performed on the obtained first electrical data, second electrical data, first thermal data, and second thermal data to calculate the heat generation amount of the transformer under the current electrical operating parameters, and calculate the thermal evolution trend in the current environment. The thermal evolution trend includes temperature rise, temperature drop, and constant temperature, and the thermal evolution trend is used as the temperature change index.

[0040] In a possible embodiment, a safe operating temperature threshold of the transformer is obtained. The safe operating temperature threshold can be one or more. When the safe operating temperature threshold includes two thresholds, it is not only used to indicate the highest safe operating limit temperature of the transformer but also can be used to reflect the safe parameter range of the transformer. For example, the safe operating temperature threshold includes a first safe operating temperature threshold and a second safe operating temperature threshold. The first safe operating temperature threshold is higher than the second safe operating temperature threshold. The first safe operating temperature threshold corresponds to the maximum temperature in the safe parameter range, and the second safe operating temperature threshold corresponds to the minimum temperature in the safe parameter range.

[0041] In a possible embodiment, the safe operating temperature threshold can be determined by the insulating material of the transformer. Different insulating materials correspond to different insulating material grades, and the insulating material grade is the classification of the insulating material according to the limit temperature. By the temperature of the environment where the transformer is located and the transformer temperature data, the maximum temperature difference between the current transformer temperature and the environment temperature is obtained, and this maximum difference is the temperature rise of the current transformer operation. By the environment temperature and the transformer temperature data, the maximum temperature difference between the current transformer temperature and the environment temperature is obtained, which is the safe operating limit of the prediction curve of the transformer thermal evolution.

[0042] Exemplarily, the insulating material grades involved in the embodiments of the present application include but are not limited to: Class A, Class E, Class B, Class F, Class H. The maximum working temperature limits and maximum temperature rise limits of transformers with different insulating material grades are as follows.

[0043] Insulating material of Class A: The maximum working temperature is 105 °C, and the maximum temperature rise should be less than 60 K.

[0044] Insulating material of Class E: The maximum working temperature is 120 °C, and the maximum temperature rise should be less than 75 K.

[0045] Class B insulation material: The maximum operating temperature is 130 °C, and the maximum temperature rise should be less than 80 K.

[0046] Class F insulation material: The maximum operating temperature is 155 °C, and the maximum temperature rise should be less than 100 K.

[0047] Class H insulation material: The maximum operating temperature is 180 °C, and the maximum temperature rise should be less than 125 K.

[0048] In a possible embodiment, according to the temperature change index, the temperature of the transformer in the current acquisition period, and the safe operating temperature threshold, the cooling module is regulated to dissipate heat from the transformer through the cooling module. After thermal evolution analysis, the thermal evolution trend is judged by the safe operating temperature threshold of the transformer. When it is judged that thermal control is required, the cooling module is regulated to accelerate the heat dissipation of the transformer, and the load can also be regulated through the upper computer of the electrical dispatching module where the transformer is located to reduce the load rate of the transformer and achieve the purpose of reducing the current.

[0049] In the embodiment of the present application, it mainly includes electrothermal data acquisition, thermal evolution analysis, and operation parameter regulation; electrothermal data is obtained through thermal sensors and electrical acquisition devices, the thermal evolution trend of the transformer operation is obtained through analysis, the thermal evolution situation of the transformer is grasped, the regulation content is judged according to the safe parameter range of the transformer, and the regulation of the transformer is completed through the transformer cooling module and the upper computer control module, improving the stability during the operation of the transformer, extending the service life of the transformer, and being able to self-regulate within the safe operation limit value, reducing the occurrence of faults, and thus improving the operation efficiency of the power system.

[0050] Optionally, step S102, predicting the temperature change index of the transformer in the next acquisition period according to the first electrothermal data and the second electrothermal data may include the following steps:

[0051] Step S201: Determine the first temperature change value and the first heat generation amount of the transformer in the current acquisition period according to the first electrothermal data.

[0052] Specifically, the first electrothermal data includes first electrical data and first thermal data; step S201, determining the first temperature change value and the first heat generation amount of the transformer in the current acquisition period according to the first electrothermal data may include the following steps:

[0053] Step S301: Determine the first temperature change value based on the first thermal data.

[0054] In a possible embodiment, the first thermal data can be represented by the target temperature change curve of the transformer. Refer to Figure 4 , Figure 4 which is a schematic diagram of a target temperature change curve provided by the embodiment of the present application. As Figure 4As shown, the x-axis of the target temperature change curve is time, and the y-axis is temperature. First, determine the time length Δt1 of the current acquisition period on the target temperature change curve, and then the first temperature change value ΔT1 can be determined on the target temperature change curve, where Δt1 = t b -t a , ΔT1 = T b -T a .

[0055] In a possible embodiment, Δt1 can be a unit of time, and the first temperature change value can be used to characterize the temperature change per unit time in the current acquisition period.

[0056] Step S302: Determine the first heating power of the transformer in the current acquisition period based on the first electrical data.

[0057] Specifically, step S302 of determining the first heating power of the transformer in the current acquisition period based on the first electrical data may include the following steps:

[0058] Step S401: Determine the output power, input power, output apparent power, transformer rated capacity, power factor, and transformer power of the transformer in the current acquisition period based on the first electrical data.

[0059] Among them, the apparent power is equal to the product of the effective value of voltage and the effective value of current, and multiplying the power factor is equal to the active power, which is also equal to the square root of the sum of the square of the active power and the square of the reactive power. The input power and output power include active power and reactive power. The transformer efficiency refers to the ratio of the output power to the input power. The losses of the transformer mainly include iron loss and copper loss, and the losses result in the efficiency not reaching 100%. The magnitudes of the input current and output current directly affect the working state and efficiency of the transformer, thus affecting the input and output powers. The transformer power refers to the output active power. Due to the existence of reactive power, the apparent power is always greater than the active power. These parameters can be directly obtained at the current stage, or the calculation steps are completed by the acquisition device.

[0060] Step S402: Determine the first transformer efficiency according to the ratio of the output power to the input power.

[0061] Specifically, the first transformer efficiency = output power / input power × 100%.

[0062] Step S403: Determine the first transformer load rate according to the ratio of the output apparent power to the transformer rated capacity.

[0063] Step S404: Determine the first heating power according to the heating power calculation formula, power factor, first transformer efficiency, and first transformer load rate.

[0064] Among them, the calculation formula for the heating power is: P1 = (1 - η1) * η2 * φ * W, where P1 is the first heating power, η1 is the efficiency of the first transformer, η2 is the load factor of the first transformer, φ is the power factor, and W is the transformer power.

[0065] Step S303: Determine the first heat quantity according to the first heating power and the time length of the current acquisition period.

[0066] In a possible embodiment, when the time length of the previous acquisition period is the length of a unit time, the magnitude of the first heat quantity is equal to the magnitude of the first heating power.

[0067] Specifically, the first heating power represents the heat quantity per unit time, indicating the first heat quantity of the current acquisition period. Through the heat quantity formula: First heat quantity = specific heat capacity × mass × target temperature change, the target temperature change represents the change in the future transformer temperature, that is, the change in the transformer temperature in the next acquisition period. However, due to different heat dissipation environments, the actual temperature change will not be the same as the calculation result of the heat quantity formula. The transformer regulation method of the present invention uses the heat quantity of the previous acquisition period and the actual temperature change to obtain the transformer temperature change coefficient as the target temperature change coefficient. This coefficient represents the influence of the current heat dissipation environment on the temperature change, and this coefficient is equivalent to the reference slope of the temperature prediction curve. By regulating the cooling device, the heat dissipation environment can be changed, thereby changing the magnitude of the coefficient and affecting the trend of the transformer temperature change. The specific determination method of the target temperature change coefficient is as follows.

[0068] Step S202: Determine the second temperature change value and the second heating power of the transformer in the previous acquisition period according to the second electrothermal data.

[0069] In a possible embodiment, the second electrothermal data includes second thermal data and second electrical data. Based on the second thermal data, the second temperature change value is determined, and based on the second electrical data, the second heating power of the transformer in the previous acquisition period is determined. The second thermal data can be represented by the target temperature change curve of the transformer. The x-axis of the target temperature change curve is time, and the y-axis is temperature. First, determine the time length Δt2 of the previous acquisition period on the target temperature change curve, and then the second temperature change value ΔT2 can be determined on the target temperature change curve.

[0070] In a possible embodiment, Δt2 can be a unit time, and the second temperature change value can be used to characterize the temperature change per unit time in the previous acquisition period.

[0071] In a possible embodiment, the second heating power = (1 - the efficiency of the second transformer) × the load factor of the second transformer × the power factor of the transformer in the previous acquisition period × the transformer power of the transformer in the previous acquisition period, where the efficiency of the second transformer is the efficiency of the transformer in the previous acquisition period, and the load factor of the second transformer is the load factor of the transformer in the previous acquisition period.

[0072] Step S203: Determine the target temperature change coefficient according to the second temperature change value and the second heating power; wherein, the target temperature change coefficient is used to reflect the heat dissipation capacity of the heat exchange system composed of the transformer and the environment where the transformer is located.

[0073] Specifically, step S203, determining the target temperature change coefficient according to the second temperature change value and the second heating power, may include the following steps:

[0074] Step S501: Determine the second heat generation amount according to the second temperature change value and the temperature conversion heat formula;

[0075] Specifically, the temperature conversion heat formula is: Q2 = c * m * ΔT2, where Q2 is the second heat generation amount, c is the specific heat capacity, m is the mass, and ΔT2 is the second temperature change value.

[0076] Step S502: Construct an equation relationship among the second heat generation amount, the second heating power, and the target temperature change coefficient;

[0077] Specifically, the equation relationship is: the second heat generation amount per unit time = the heat generated by the second heating power per unit time × the target temperature change coefficient, which is expressed by the formula: c * m * δT2 = P2 * k, where k is the target temperature change coefficient, P2 is the second heating power, δT2 is the second temperature change value per unit time, and when Δt2 corresponding to ΔT2 takes the unit time, δT2 = ΔT2.

[0078] Step S503: Determine the target temperature change coefficient according to the equation relationship.

[0079] Specifically, k = c * m * δT2 / P2 can be obtained.

[0080] Step S204: Determine the temperature change index according to the target temperature change coefficient, the first temperature change value, and the first heat generation amount.

[0081] Specifically, step S204, determining the temperature change index according to the target temperature change coefficient, the first temperature change value, and the first heat generation amount, may include the following steps:

[0082] Step S601: Determine the reference temperature change value of the current acquisition period according to the target temperature change coefficient and the first heat generation amount.

[0083] Specifically, refer to the temperature change value where ΔT1 ′ is the reference temperature change value, δt1 is the unit time, k is the target temperature change coefficient, Q1 is the first heat generation amount per unit time, c is the specific heat capacity, m is the mass, and P1 is the first heat generation power.

[0084] Step S602: Determine the reference slope of the temperature prediction curve for the current acquisition period according to the reference temperature change value.

[0085] Specifically, the reference slope where k is the target temperature change coefficient, which is calculated from the electrothermal data of the previous acquisition period, and P1 is the first heat generation power, which is calculated from the electrical data of the current acquisition period.

[0086] Step S603: Determine the measured slope of the temperature measured curve for the current acquisition period according to the first temperature change value.

[0087] Specifically, the measured slope k2 = δT1 / δt1, where δT1 is the first temperature change value per unit time, which is also the directly measured temperature change value of the current acquisition period. When the Δt1 corresponding to ΔT1 takes the unit time δt1, δT1 = ΔT1.

[0088] Step S604: Compare the reference slope and the measured slope to obtain a comparison result.

[0089] Specifically, since the temperature change per unit time satisfies a linear function, by comparing the reference slope k1 and the measured slope k2, the temperature change trend can be judged, and then the temperature change index can be obtained.

[0090] Step S605: Determine the temperature change index according to the comparison result.

[0091] In a possible embodiment, when the comparison result is that k2 is greater than k1, that is, the slope of the temperature measured curve per unit time is greater than the slope of the temperature prediction curve per unit time, then the temperature change trend of the transformer in the next acquisition period is that the temperature rise slows down or the temperature drop speeds up, and the temperature change index is determined to be rising or falling according to k2.

[0092] In a possible embodiment, when the comparison result is that k2 is less than k1, then the temperature change trend of the transformer in the next acquisition period is that the temperature rise speeds up or the temperature drop slows down, and the temperature change index is determined to be rising or falling according to k2.

[0093] Further, among the two indicators of the rise and fall of the temperature change indicator, it is further subdivided. The rise includes a slower rise and a faster rise, and the fall includes a slower fall and a faster fall. If k2 is greater than k1 and k2 is greater than 0, the temperature change indicator is a slower rise. If k2 is greater than k1 and k2 is less than or equal to 0, the temperature change indicator is a faster fall. If k2 is less than k1 and k2 is greater than 0, the temperature change indicator is a faster rise. If k2 is less than k1 and k2 is less than or equal to 0, the temperature change indicator is a slower fall. Refer to Figure 5 , Figure 5 is a schematic diagram of a reference slope and a measured slope provided by an embodiment of the present application. As Figure 5 shown, the measured slope k2 is greater than the reference slope k1, and k2 is greater than 0. At this time, the temperature change indicator is a slower rise.

[0094] Optionally, in step S104, according to the temperature change indicator, the temperature of the transformer in the current acquisition period, and the safe operating temperature threshold, the cooling module can be regulated, which may include the following steps:

[0095] Step S701: If the temperature change indicator is rising and the temperature of the transformer in the current acquisition period is greater than or equal to the first warning temperature, increase the working power of the cooling module in the current acquisition period to obtain the first working power, and control the cooling module to cool at the first working power, where the first warning temperature is less than the safe operating temperature threshold, and the first working power is greater than the rated working power of the cooling module and less than or equal to the full-load working power of the cooling module;

[0096] Step S702: If the temperature change indicator is falling and the temperature of the transformer in the current acquisition period is less than the second warning temperature, reduce the working power of the cooling module in the current acquisition period to obtain the second working power, and control the cooling module to cool at the second working power, where the second warning temperature is less than the first warning temperature, and the second working power is less than the rated working power.

[0097] In a possible embodiment, when the value of the rated working power is 200 and the value of the full-load working power is 300, the value of the first working power can be any value greater than 200 and less than or equal to 300, and the value of the second working power can be any value less than 200 and greater than or equal to 0.

[0098] In a possible embodiment, when the increase in the temperature change index includes a slower increase and a faster increase, if the temperature of the transformer in the current acquisition cycle is greater than or equal to the first warning temperature, the value of the first operating power when the temperature change index is a faster increase can be greater than the value of the first operating power when the temperature change index is a slower increase. The target operating power increase value of the cooling module in the current acquisition cycle can also be determined according to the difference between the temperature of the transformer in the current acquisition cycle and the first warning temperature. The greater the difference, the greater the target operating power increase value.

[0099] In a possible embodiment, when the decrease in the temperature change index includes a slower decrease and a faster decrease. If the temperature of the transformer in the current acquisition cycle is less than the second warning temperature, the value of the second operating power when the temperature change index is a faster decrease can be less than the value of the second operating power when the temperature change index is a slower decrease. The target operating power decrease value of the cooling module in the current acquisition cycle can also be determined according to the difference between the temperature of the transformer in the current acquisition cycle and the second warning temperature. The smaller the difference, the greater the target operating power decrease value.

[0100] In a possible embodiment, the cooling module includes an internal cooling module and an external cooling module. Among them, the internal cooling module is used to ensure that the heat of the winding and iron core is dissipated into the surrounding medium, and the external cooling module is used to ensure that the heat in the medium is dissipated outside the transformer. According to the size of the transformer capacity and the different types of media and cycles, different cooling methods are adopted for the transformer. The server can control the cooling intensity of the cooling system according to requirements to achieve the purpose of changing the thermal conductivity of the transformer and adjusting the thermal evolution trend of the transformer.

[0101] In a possible embodiment, the cooling method of the dry-type transformer is air self-cooling, and the transformer can be cooled by installing a fan. When controlling the cooling module to cool at the first operating power, the rotation speed of the fan will increase compared with when the cooling module cools at the rated operating power.

[0102] In a possible embodiment, the cooling methods of the oil-immersed transformer include oil-immersed self-cooling, oil-immersed air-cooling, forced oil circulation air-cooling or forced guide oil circulation air-cooling, forced oil circulation water-cooling or forced guide oil circulation water-cooling. When controlling the cooling module to cool at the first operating power, the temperature of the liquid cooling medium will decrease compared with when the cooling module cools at the rated operating power.

[0103] In a possible embodiment, the layout form of the cooling module is divided into two types. One is that the cooling module is fixed on the transformer oil tank, and the other is that the cooling module is fixed nearby and concentrated on the bracket type.

[0104] In a possible embodiment, refer to Figure 6 ,Figure 6 This is a regulation flowchart based on a cooling module and a host computer provided by an embodiment of the present application. As Figure 6 shown, first, electrothermal data is collected through an electrothermal sensor to obtain electrical data and thermal data. Then, comprehensive heat source analysis is performed based on the electrical data and thermal data, and heat evolution analysis is combined with the safe operation limit. When it is analyzed through heat evolution that the heating power of the transformer is too high or the temperature evolution curve may break through the safe operation limit, first, the regulation system enhances the cooling capacity of the cooling module to make the transformer temperature change curve deviate from the predicted curve of the transformer heat evolution, that is, to make the slope of the transformer temperature change curve decrease and make the transformer temperature change curve tend to a stable state, so that the transformer operates in a thermal equilibrium state. However, the regulation performed through the cooling module is local regulation, and there may be a situation where the maximum regulation capacity is reached. When the local regulation capacity is limited and cannot meet the regulation requirements, the regulation purpose can be achieved through remote regulation. The remote regulation is performed by the host computer according to the electrical system to be regulated, so as to prevent the transformer from continuing to operate in the current state and causing a failure. This kind of failure will cause a power outage, which may be a trip for protecting the power grid or an accidental power outage not detected.

[0105] In a possible embodiment, the transformer regulation system further includes an electrical dispatching module; if the temperature change index is rising and the temperature of the transformer in the current collection period is greater than or equal to the third warning temperature, control the electrical dispatching module to regulate the load rate of the transformer to reduce the load rate of the transformer, where the third warning temperature is greater than the first warning temperature and less than the safe operation temperature threshold.

[0106] Exemplarily, the electrical dispatching module can be the host computer of the electrical dispatching system where the transformer is located. The load regulation is performed according to the host computer of the electrical dispatching system where the transformer is located to reduce the load rate of the transformer to achieve the purpose of reducing the current. When the maximum output of the cooling module cannot control the predicted curve within the safe operation limit, a regulation request is sent to the host computer through the communication device, and the host computer performs the regulation according to the electrical system to be regulated.

[0107] In a possible embodiment, the transformer includes two windings and an iron core. The two windings are a high-voltage winding and a low-voltage winding respectively. When performing temperature regulation on the transformer, temperature prediction calculations and temperature regulation can be performed on the high-voltage winding, low-voltage winding, and iron core respectively.

[0108] In summary, in the embodiments of the present application, first, the first electrothermal data of the transformer in the current acquisition period and the second electrothermal data of the previous acquisition period are obtained. Then, based on the first electrothermal data and the second electrothermal data, the temperature change index of the transformer in the next acquisition period is predicted, where the temperature change index is used to indicate whether the temperature of the transformer will rise in the next acquisition period. Next, the safe operating temperature threshold of the transformer is obtained. Finally, based on the temperature change index, the temperature of the transformer in the current acquisition period, and the safe operating temperature threshold, the cooling module is regulated to dissipate heat from the transformer through the cooling module. Thus, by predicting the temperature change index of the transformer in the next acquisition period and regulating the cooling module according to the temperature change index to dissipate heat from the transformer, the process of fault evolution can be blocked before the fault evolves, thereby improving the operating efficiency of the power system.

[0109] The method of the embodiments of the present invention is described in detail above. The device of the embodiments of the present invention is provided below.

[0110] Refer to Figure 7 , Figure 7 FIG. Figure 7 is a schematic structural diagram of a transformer regulation device provided by an embodiment of the present application. As

[0111] shown, the transformer regulation device 800 is applied to the server of the transformer regulation system, and the transformer regulation system further includes a transformer and a cooling module; it includes an acquisition unit 801 and a processing unit 802;

[0112] The acquisition unit 801 is configured to acquire the first electrothermal data of the transformer in the current acquisition period and the second electrothermal data of the previous acquisition period;

[0113] The processing unit 802 is configured to predict the temperature change index of the transformer in the next acquisition period according to the first electrothermal data and the second electrothermal data, and the temperature change index is used to indicate whether the temperature of the transformer will rise in the next acquisition period;

[0114] Obtain the safe operating temperature threshold of the transformer;

[0115] In a possible embodiment, in terms of predicting the temperature change index of the transformer in the next acquisition period according to the first electrothermal data and the second electrothermal data, the processing unit 802 is specifically configured to:

[0116] Determine the first temperature change value and the first heat generation amount of the transformer in the current acquisition period according to the first electrothermal data;

[0117] Determine the second temperature change value and the second heat generation power of the transformer in the previous acquisition period according to the second electrothermal data;

[0118] Determine a target temperature change coefficient according to the second temperature change value and the second heat generation power; the target temperature change coefficient is used to reflect the heat dissipation capacity of the heat exchange system composed of the transformer and the environment where the transformer is located;

[0119] Determine a temperature change index according to the target temperature change coefficient, the first temperature change value and the first heat generation amount.

[0120] In a possible embodiment, the first electrothermal data includes first electrical data and first thermal data; in determining the first temperature change value and the first heat generation amount of the transformer in the current acquisition period according to the first electrothermal data, the processing unit 802 is specifically configured to:

[0121] Determine the first temperature change value based on the first thermal data;

[0122] Determine the first heat generation power of the transformer in the current acquisition period based on the first electrical data;

[0123] Determine the first heat generation amount according to the first heat generation power and the time length of the current acquisition period.

[0124] In a possible embodiment, in determining the first heat generation power of the transformer in the current acquisition period based on the first electrical data, the processing unit 802 is specifically configured to:

[0125] Determine the output power, input power, output apparent power, transformer rated capacity, power factor and transformer power of the transformer in the current acquisition period based on the first electrical data;

[0126] Determine the first transformer efficiency according to the ratio of the output power to the input power;

[0127] Determine the first transformer load rate according to the ratio of the output apparent power to the transformer rated capacity;

[0128] Determine the first heat generation power according to the heat generation power calculation formula, power factor, first transformer efficiency and first transformer load rate;

[0129] The heat generation power calculation formula is: P1 = (1 - η1) * η2 * φ * W, where P1 is the first heat generation power, η1 is the first transformer efficiency, η2 is the first transformer load rate, φ is the power factor, and W is the transformer power.

[0130] In a possible embodiment, in determining the target temperature change coefficient according to the second temperature change value and the second heat generation power, the processing unit 802 is specifically configured to:

[0131] Determine the second calorific value according to the second temperature change value and the temperature conversion heat formula;

[0132] The temperature conversion heat formula is: Q2 = c * m * ΔT2, where Q2 is the second calorific value, c is the specific heat capacity, m is the mass, and ΔT2 is the second temperature change value;

[0133] Construct an equation relationship among the second calorific value, the second heating power, and the target temperature change coefficient;

[0134] Determine the target temperature change coefficient according to the equation relationship.

[0135] In a possible embodiment, in terms of determining the temperature change index according to the target temperature change coefficient, the first temperature change value, and the first calorific value, the processing unit 802 is specifically configured to:

[0136] Determine the reference temperature change value of the current acquisition period according to the target temperature change coefficient and the first calorific value;

[0137] Determine the reference slope of the temperature prediction curve of the current acquisition period according to the reference temperature change value;

[0138] Determine the measured slope of the temperature measured curve of the current acquisition period according to the first temperature change value;

[0139] Compare the reference slope and the measured slope to obtain a comparison result;

[0140] Determine the temperature change index according to the comparison result.

[0141] In a possible embodiment, in terms of regulating the cooling module according to the temperature change index, the temperature of the transformer in the current acquisition period, and the safe operating temperature threshold, the processing unit 802 is specifically configured to:

[0142] If the temperature change index is rising and the temperature of the transformer in the current acquisition period is greater than or equal to the first warning temperature, increase the working power of the cooling module in the current acquisition period to obtain the first working power, and control the cooling module to cool at the first working power, where the first warning temperature is less than the safe operating temperature threshold, and the first working power is greater than the rated working power of the cooling module and less than or equal to the full-load working power of the cooling module;

[0143] If the temperature change index is falling and the temperature of the transformer in the current acquisition period is less than the second warning temperature, reduce the working power of the cooling module in the current acquisition period to obtain the second working power, and control the cooling module to cool at the second working power, where the second warning temperature is less than the first warning temperature, and the second working power is less than the rated working power.

[0144] In a possible embodiment, the transformer regulation system further includes an electrical dispatching module; the processing unit 802 is further configured to:

[0145] If the temperature change index is an increase and the temperature of the transformer in the current acquisition period is greater than or equal to the third warning temperature, control the electrical dispatching module to regulate the load rate of the transformer to reduce the load rate of the transformer, where the third warning temperature is greater than the first warning temperature and less than the safe operating temperature threshold.

[0146] Refer to Figure 8 , Figure 8 is a schematic structural diagram of an electronic device provided by an embodiment of the present application. As Figure 8 shown, the electronic device 900 includes a transceiver 901, a processor 902, and a memory 903, which are connected to each other through a bus 904. The memory 903 is used to store computer programs and data, and can transmit the data stored in the memory 903 to the processor 902. Among them, the electronic device 900 may be the above-mentioned transformer regulation device 800, and the processor 902 may be the above-mentioned acquisition unit 801 and processing unit 802.

[0147] The processor 902 is configured to read the computer program in the memory 903 and perform the following operations:

[0148] Obtain the first electrothermal data of the transformer in the current acquisition period and the second electrothermal data of the previous acquisition period;

[0149] According to the first electrothermal data and the second electrothermal data, predict the temperature change index of the transformer in the next acquisition period, where the temperature change index is used to indicate whether the temperature of the transformer in the next acquisition period will increase;

[0150] Obtain the safe operating temperature threshold of the transformer;

[0151] According to the temperature change index, the temperature of the transformer in the current acquisition period, and the safe operating temperature threshold, regulate the cooling module to dissipate heat from the transformer through the cooling module.

[0152] In a possible embodiment, in terms of predicting the temperature change index of the transformer in the next acquisition period according to the first electrothermal data and the second electrothermal data, the processor 902 is specifically configured to perform the following operations:

[0153] According to the first electrothermal data, determine the first temperature change value and the first heat generation amount of the transformer in the current acquisition period;

[0154] According to the second electrothermal data, determine the second temperature change value and the second heat generation power of the transformer in the previous acquisition period;

[0155] Determine a target temperature change coefficient according to the second temperature change value and the second heat generation power; the target temperature change coefficient is used to reflect the heat dissipation capacity of the heat exchange system composed of the transformer and the environment where the transformer is located;

[0156] Determine a temperature change index according to the target temperature change coefficient, the first temperature change value, and the first heat generation amount.

[0157] In a possible embodiment, the first electro-thermal data includes first electrical data and first thermal data; in determining the first temperature change value and the first heat generation amount of the transformer in the current acquisition period according to the first electro-thermal data, the processor 902 is specifically configured to perform the following operations:

[0158] Determine the first temperature change value based on the first thermal data;

[0159] Determine the first heat generation power of the transformer in the current acquisition period based on the first electrical data;

[0160] Determine the first heat generation amount according to the first heat generation power and the time length of the current acquisition period.

[0161] In a possible embodiment, in determining the first heat generation power of the transformer in the current acquisition period based on the first electrical data, the processor 902 is specifically configured to perform the following operations:

[0162] Based on the first electrical data, determine the output power, input power, output apparent power, transformer rated capacity, power factor, and transformer power of the transformer in the current acquisition period;

[0163] Determine the first transformer efficiency according to the ratio of the output power to the input power;

[0164] Determine the first transformer load rate according to the ratio of the output apparent power to the transformer rated capacity;

[0165] Determine the first heat generation power according to the heat generation power calculation formula, power factor, first transformer efficiency, and first transformer load rate;

[0166] The heat generation power calculation formula is: P1 = (1 - η1) * η2 * φ * W, where P1 is the first heat generation power, η1 is the first transformer efficiency, η2 is the first transformer load rate, φ is the power factor, and W is the transformer power.

[0167] In a possible embodiment, in determining the target temperature change coefficient according to the second temperature change value and the second heat generation power, the processor 902 is specifically configured to perform the following operations:

[0168] Determine the second heat generation amount according to the second temperature change value and the temperature conversion heat formula;

[0169] The temperature conversion heat formula is: Q2 = c * m * ΔT2, where Q2 is the second calorific value, c is the specific heat capacity, m is the mass, and ΔT2 is the second temperature change value;

[0170] Construct an equation relationship among the second calorific value, the second heating power, and the target temperature change coefficient;

[0171] Determine the target temperature change coefficient according to the equation relationship.

[0172] In a possible embodiment, in terms of determining the temperature change index according to the target temperature change coefficient, the first temperature change value, and the first calorific value, the processor 902 is specifically configured to perform the following operations:

[0173] Determine the reference temperature change value of the current acquisition period according to the target temperature change coefficient and the first calorific value;

[0174] Determine the reference slope of the temperature prediction curve of the current acquisition period according to the reference temperature change value;

[0175] Determine the measured slope of the temperature measured curve of the current acquisition period according to the first temperature change value;

[0176] Compare the reference slope and the measured slope to obtain a comparison result;

[0177] Determine the temperature change index according to the comparison result.

[0178] In a possible embodiment, in terms of regulating the cooling module according to the temperature change index, the temperature of the transformer in the current acquisition period, and the safe operating temperature threshold, the processor 902 is specifically configured to perform the following operations:

[0179] If the temperature change index is rising and the temperature of the transformer in the current acquisition period is greater than or equal to the first warning temperature, increase the working power of the cooling module in the current acquisition period to obtain the first working power, and control the cooling module to cool at the first working power, where the first warning temperature is less than the safe operating temperature threshold, and the first working power is greater than the rated working power of the cooling module and less than or equal to the full-load working power of the cooling module;

[0180] If the temperature change index is falling and the temperature of the transformer in the current acquisition period is less than the second warning temperature, reduce the working power of the cooling module in the current acquisition period to obtain the second working power, and control the cooling module to cool at the second working power, where the second warning temperature is less than the first warning temperature, and the second working power is less than the rated working power.

[0181] In a possible embodiment, the transformer regulation system further includes an electrical dispatching module; the processor 902 is further configured to perform the following operations:

[0182] If the temperature change index is an increase, and the temperature of the transformer in the current acquisition period is greater than or equal to the third warning temperature, control the electrical dispatching module to adjust the load rate of the transformer to reduce the load rate of the transformer, where the third warning temperature is greater than the first warning temperature and less than the safe operating temperature threshold.

[0183] The embodiments of the present application also provide a computer-readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement part or all of the steps of any one of the transformer control methods described in the above method embodiments.

[0184] The embodiments of the present application also provide a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute part or all of the steps of any one of the transformer control methods described in the above method embodiments.

[0185] It should be noted that for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0186] In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0187] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or module can be in an electrical or other form.

[0188] The modules described as separate components may or may not be physically separated. The components displayed as modules may or may not be physical modules, that is, they can be located in one place, or they can be distributed to multiple network modules. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0189] In addition, each functional module in various embodiments of the present application may be integrated into one processing module, may exist physically as individual modules, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software program modules.

[0190] If the above-mentioned integrated module is implemented in the form of a software program module and sold or used as an independent product, it may be stored in a computer-readable memory. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned memory includes various media that can store program codes, such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs.

[0191] The above has introduced the embodiments of the present application in detail. Specific examples are used in this article to elaborate on the principles and implementation manners of the present application. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A transformer regulation method, characterized in that, A server applied to a transformer regulation system, the transformer regulation system further including a transformer and a cooling module; the method includes: Obtain first electrothermal data of the transformer in the current acquisition period and second electrothermal data of the previous acquisition period; According to the first electrothermal data and the second electrothermal data, predict a temperature change index of the transformer in the next acquisition period, the temperature change index being used to indicate whether the temperature of the transformer will rise in the next acquisition period; Obtain the safe operating temperature threshold of the transformer; According to the temperature change index, the temperature of the transformer in the current acquisition period, and the safe operating temperature threshold, regulate the cooling module to dissipate heat from the transformer through the cooling module.

2. The method according to claim 1, wherein, The predicting the temperature change index of the transformer in the next acquisition period according to the first electrothermal data and the second electrothermal data includes: According to the first electrothermal data, determine a first temperature change value and a first heat generation amount of the transformer in the current acquisition period; According to the second electrothermal data, determine a second temperature change value and a second heat generation power of the transformer in the previous acquisition period; According to the second temperature change value and the second heat generation power, determine a target temperature change coefficient; the target temperature change coefficient is used to reflect the heat dissipation ability of the heat exchange system composed of the transformer and the environment where the transformer is located; According to the target temperature change coefficient, the first temperature change value, and the first heat generation amount, determine the temperature change index.

3. The method according to claim 2, wherein The first electrothermal data includes first electrical data and first thermal data; the determining the first temperature change value and the first heat generation amount of the transformer in the current acquisition period according to the first electrothermal data includes: Based on the first thermal data, determine the first temperature change value; Based on the first electrical data, determine the first heat generation power of the transformer in the current acquisition period; According to the first heat generation power and the time length of the current acquisition period, determine the first heat generation amount.

4. The method according to claim 3, characterized in that, The determining the first heat generation power of the transformer in the current acquisition period based on the first electrical data includes: Based on the first electrical data, determine the output power, input power, output apparent power, transformer rated capacity, power factor, and transformer power of the transformer in the current acquisition period; According to the ratio of the output power to the input power, determine a first transformer efficiency; According to the ratio of the output apparent power to the transformer rated capacity, determine a first transformer load rate; According to the heat generation power calculation formula, the power factor, the first transformer efficiency, and the first transformer load rate, determine the first heat generation power; The heat generation power calculation formula is: P1=(1 - η1)*η2*φ*W, where P1 is the first heat generation power, η1 is the first transformer efficiency, η2 is the first transformer load rate, φ is the power factor, and W is the transformer power.

5. The method according to claim 2, wherein The determining the target temperature change coefficient according to the second temperature change value and the second heat generation power includes: Determine the second calorific value according to the second temperature change value and the temperature conversion heat formula; The temperature conversion heat formula is: Q2 = c * m * ΔT2, where Q2 is the second calorific value, c is the specific heat capacity, m is the mass, and ΔT2 is the second temperature change value; Construct an equation relationship between the second calorific value, the second heating power, and the target temperature change coefficient; Determine the target temperature change coefficient according to the equation relationship.

6. The method according to claim 2, wherein The determining the temperature change index according to the target temperature change coefficient, the first temperature change value, and the first calorific value includes: Determine the reference temperature change value of the current acquisition period according to the target temperature change coefficient and the first calorific value; Determine the reference slope of the temperature prediction curve of the current acquisition period according to the reference temperature change value; Determine the measured slope of the temperature measured curve of the current acquisition period according to the first temperature change value; Compare the reference slope and the measured slope to obtain a comparison result; Determine the temperature change index according to the comparison result.

7. The method according to claim 1, wherein The regulating the cooling module according to the temperature change index, the temperature of the transformer in the current acquisition period, and the safe operation temperature threshold includes: If the temperature change index is rising, and the temperature of the transformer in the current acquisition period is greater than or equal to the first warning temperature, increase the working power of the cooling module in the current acquisition period to obtain the first working power, and control the cooling module to cool at the first working power, where the first warning temperature is less than the safe operation temperature threshold, and the first working power is greater than the rated working power of the cooling module and less than or equal to the full-load working power of the cooling module; If the temperature change index is falling, and the temperature of the transformer in the current acquisition period is less than the second warning temperature, reduce the working power of the cooling module in the current acquisition period to obtain the second working power, and control the cooling module to cool at the second working power, where the second warning temperature is less than the first warning temperature, and the second working power is less than the rated working power.

8. The method according to claim 7, wherein The transformer regulation system further includes an electrical dispatching module; the method further includes: If the temperature change index is rising, and the temperature of the transformer in the current acquisition period is greater than or equal to the third warning temperature, control the electrical dispatching module to regulate the load rate of the transformer to reduce the load rate of the transformer, where the third warning temperature is greater than the first warning temperature and less than the safe operation temperature threshold.

9. A transformer regulation device, characterized in that, Applied to the server of the transformer regulation system, the transformer regulation system further includes a transformer and a cooling module; the device includes an acquisition unit and a processing unit; The acquisition unit is used to acquire the first electrothermal data of the transformer in the current acquisition period and the second electrothermal data of the previous acquisition period; The processing unit is configured to predict a temperature change index of the transformer in the next acquisition period according to the first electrothermal data and the second electrothermal data, where the temperature change index is used to indicate whether the temperature of the transformer will rise in the next acquisition period; Obtain the safe operating temperature threshold of the transformer; Regulate the cooling module according to the temperature change index, the temperature of the transformer in the current acquisition period, and the safe operating temperature threshold, so as to dissipate heat from the transformer through the cooling module.

10. An electronic device, characterized in that, It includes: A processor and a memory. The processor is connected to the memory. The memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the electronic device executes the method according to any one of claims 1-8.

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