CN112859956A - Control method and device of temperature regulation equipment - Google Patents
Control method and device of temperature regulation equipment Download PDFInfo
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Abstract
The invention discloses a control method and a control device of temperature adjusting equipment. Wherein the temperature regulating device is disposed in the energy storage system for regulating a temperature within the energy storage system, the method comprising: acquiring a current electricity price corresponding to the current moment of the current time period and a preset electricity price corresponding to the next time period; comparing the current electricity price with a preset electricity price to obtain a first comparison result; acquiring a time difference value between the current time and the starting time of the next time period, and comparing the time difference value with a preset time length to obtain a second comparison result, wherein the preset time length is at least determined by the running state of the energy storage system; and controlling the running state of the temperature adjusting equipment according to the first comparison result and the second comparison result so as to minimize the energy consumption of the energy storage system. The invention solves the technical problem that the energy consumption of the energy storage system cannot be effectively reduced in the prior art.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a method and a device for controlling temperature adjusting equipment.
Background
The energy storage system is arranged in a factory of an enterprise, a workplace of an industrial and commercial user or other scenes with peak-valley electricity prices, and is mainly used for carrying out peak-valley arbitrage, namely, the user charges the energy storage system by utilizing the energy storage characteristic of the energy storage system when the electricity prices are lower; and when the electricity price is higher, discharging the energy storage system to obtain the benefit. Wherein, the electricity prices corresponding to different time periods are different.
The yield of the energy storage System is influenced by the efficiency of the energy storage System, and the influencing factors at least comprise transformer loss (such as medium voltage access), Power Conversion System (Power converter) loss, station transformer loss and battery charging and discharging loss. The loss of the temperature regulating equipment of the energy storage system is a main part of the station variable loss, so that the optimization of the temperature regulating equipment to reduce the loss is a key step for improving the energy storage system.
In the prior art, the loss of the temperature adjusting equipment is reduced by automatic judgment of the temperature adjusting equipment and a sheep-type management mode of an energy storage system, namely, the control target temperature of the temperature adjusting equipment is set to be the optimal temperature T0, the temperature adjusting equipment automatically controls the temperature according to the optimal temperature, and when the operating temperature of the energy storage system is higher than the optimal temperature, the temperature adjusting equipment is controlled to perform refrigeration operation; and when the operating temperature of the energy storage system is lower than the optimal temperature, controlling the temperature regulating equipment to perform heating operation. In the above process, the power consumption of the temperature adjustment device depends on the control logic of the temperature adjustment device itself, and has no direct association with the energy storage system, so that the energy consumption of the energy storage system cannot be effectively reduced.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a control method and a control device of temperature adjusting equipment, and at least solves the technical problem that the energy consumption of an energy storage system cannot be effectively reduced in the prior art.
According to an aspect of an embodiment of the present invention, there is provided a control method of a temperature adjustment device provided in an energy storage system for adjusting a temperature within the energy storage system, the method including: acquiring a current electricity price corresponding to the current moment of the current time period and a preset electricity price corresponding to the next time period; comparing the current electricity price with a preset electricity price to obtain a first comparison result; acquiring a time difference value between the current time and the starting time of the next time period, and comparing the time difference value with a preset time length to obtain a second comparison result, wherein the preset time length is at least determined by the running state of the energy storage system; and controlling the running state of the temperature adjusting equipment according to the first comparison result and the second comparison result so as to minimize the energy consumption of the energy storage system.
Further, the control method of the temperature adjustment apparatus further includes: and acquiring an input preset value before comparing the time difference with the preset time length to obtain a second comparison result, and determining the preset value as the preset time length.
Further, the control method of the temperature adjustment apparatus further includes: obtaining a predicted temperature variation and a specific heat capacity of the energy storage system before comparing the time difference with a preset time length to obtain a second comparison result, wherein the predicted temperature variation is the predicted variation of the internal temperature of the energy storage system within the preset time length; obtaining the heat productivity and the heat dissipation of a battery cell in an energy storage system in unit time; calculating the product of the predicted temperature variation and the specific heat capacity to obtain a first result; calculating the difference value of the heating value and the heat dissipation value to obtain a second result; and calculating the ratio of the first result to the second result to obtain the preset duration.
Further, the control method of the temperature adjustment apparatus further includes: obtaining the current temperature corresponding to the battery cell in the energy storage system and the lowest allowable temperature of the battery cell before comparing the time difference with the preset time length and obtaining a second comparison result, wherein the lowest allowable temperature is the lowest temperature corresponding to the normal operation of the battery cell; acquiring the temperature rise speed or the temperature drop speed in the energy storage system when the temperature adjusting equipment does not refrigerate; calculating the difference value between the current temperature and the lowest allowable temperature to obtain a third result; and calculating the ratio of the third result to the temperature rise speed or the temperature drop speed to obtain the preset duration.
Further, the control method of the temperature adjustment apparatus further includes: determining the corresponding safety protection level of the energy storage system; under the condition that the safety protection level is lower than a preset level, acquiring the average cell temperature of a cell in the energy storage system, and determining the average cell temperature as the current temperature; and under the condition that the safety protection grade is higher than or equal to the preset grade, acquiring the lowest cell temperature or the highest cell temperature of the cells in the energy storage system, and determining the lowest cell temperature or the highest cell temperature as the current temperature.
Further, the control method of the temperature adjustment apparatus further includes: determining the change trend of the ambient temperature in the energy storage system when the temperature adjusting equipment does not refrigerate under the condition that the current electricity price is smaller than the preset electricity price; under the condition that the environmental temperature variation trend is a cooling trend and the time difference is less than or equal to the preset time length, controlling the temperature adjusting equipment to enter a heating mode until the temperature of the battery cell in the energy storage system reaches a maximum allowable temperature, wherein the maximum allowable temperature is the highest temperature corresponding to the normal operation of the battery cell; and controlling the temperature adjusting equipment to keep the current running state under the condition that the change trend of the environmental temperature is a cooling trend and the time difference value is greater than the preset time length.
Further, the control method of the temperature adjustment apparatus further includes: determining the change trend of the ambient temperature in the energy storage system when the temperature adjusting equipment does not refrigerate under the condition that the current electricity price is smaller than the preset electricity price; under the condition that the ambient temperature variation trend is a temperature rising trend and the time difference is less than or equal to the preset time length, controlling the temperature adjusting equipment to operate in a refrigeration mode until the temperature of the battery cell in the energy storage system reaches the lowest allowable temperature, wherein the lowest allowable temperature is the lowest temperature corresponding to the normal operation of the battery cell; and controlling the temperature adjusting equipment to keep the current running state under the condition that the environment temperature change trend is a temperature rising trend and the time difference value is greater than the preset time length.
Further, the control method of the temperature adjustment apparatus further includes: determining the change trend of the ambient temperature in the energy storage system when the temperature adjusting equipment does not refrigerate under the condition that the current electricity price is greater than or equal to the preset electricity price; controlling the temperature adjusting equipment to enter a standby state under the condition that the environment temperature variation trend is a temperature rising trend and the time difference value is less than or equal to the preset time length; and controlling the temperature adjusting equipment to keep the current running state under the condition that the environment temperature change trend is a temperature rising trend and the time difference value is greater than the preset time length.
Further, the control method of the temperature adjustment apparatus further includes: determining the change trend of the ambient temperature in the energy storage system when the temperature adjusting equipment does not refrigerate under the condition that the current electricity price is greater than or equal to the preset electricity price; controlling the temperature adjusting equipment to enter a standby state under the condition that the environment temperature change trend is a cooling trend and the time difference value is less than or equal to the preset time length; and controlling the temperature adjusting equipment to keep the current running state under the condition that the change trend of the environmental temperature is a cooling trend and the time difference value is greater than the preset time length.
Further, the control method of the temperature adjustment apparatus further includes: controlling the temperature adjusting equipment to enter a standby state, and detecting whether the preset electricity price is less than the current electricity price after the energy storage system enters the next period; and under the condition that the preset electricity price is less than the current electricity price, controlling the temperature adjusting equipment to enter a heating mode or a cooling mode.
According to another aspect of the embodiments of the present invention, there is also provided a control apparatus of a temperature adjustment device provided in an energy storage system for adjusting a temperature within the energy storage system, the apparatus including: the system comprises an acquisition module, a processing module and a display module, wherein the acquisition module is used for acquiring a current electricity price corresponding to the current moment of a current time period and a preset electricity price corresponding to a next time period; the calculating module is used for calculating the time difference value between the current moment and the starting time of the next time period; the first comparison module is used for comparing the current electricity price with the preset electricity price to obtain a first comparison result; the second comparison module is used for acquiring a time difference value between the current time and the starting time of the next time period, and comparing the time difference value with a preset time length to obtain a second comparison result, wherein the preset time length is at least determined by the running state of the energy storage system; and the control module is used for controlling the running state of the temperature regulating equipment according to the first comparison result and the time difference value so as to enable the energy consumption of the energy storage system to be the lowest.
According to another aspect of the embodiments of the present invention, there is also provided a non-volatile storage medium having a computer program stored therein, wherein the computer program is configured to execute the control method of the temperature adjustment apparatus described above when running.
According to another aspect of the embodiments of the present invention, there is also provided a processor for executing a program, wherein the program is configured to execute the control method of the temperature adjustment apparatus described above when running.
In the embodiment of the invention, a mode of controlling the temperature adjusting equipment according to the electricity price pairs in different time periods is adopted, after the current electricity price corresponding to the current time of the current time period and the preset electricity price corresponding to the next time period are obtained, and the time difference between the current time and the starting time of the next time period is obtained, the current electricity price and the preset electricity price are compared to obtain a first comparison result, the time difference is compared with the preset time length to obtain a second comparison result, and finally, the operation state of the temperature adjusting equipment is controlled according to the first comparison result and the second comparison result to enable the energy consumption of the energy storage system to be the lowest, wherein the preset time length is at least determined by the operation state of the energy storage system.
In the process, the preset time is related to the running state of the energy storage system, and the preset time is related to the running state of the temperature adjusting device, so that the power consumption of the temperature adjusting device is related to the running state of the energy storage system. In addition, in the present application, the operation state of the temperature adjustment device is also related to the electricity prices at different time periods, and therefore, in the process of controlling the temperature adjustment device, the peak-valley profit of the energy storage system can be improved in consideration of the electricity prices at different time periods.
Therefore, the scheme provided by the application achieves the purpose of reducing the energy consumption of the energy storage system, the technical effect of improving the benefit of the energy storage system is achieved, and the technical problem that the energy consumption of the energy storage system cannot be effectively reduced in the prior art is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart of a control method of a temperature adjustment apparatus according to an embodiment of the present invention;
FIG. 2 is a flow chart of an alternative method of controlling a thermostat according to an embodiment of the invention;
fig. 3 is a schematic diagram of a control device of a temperature adjustment apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
In accordance with an embodiment of the present invention, there is provided an embodiment of a method of controlling a thermostat, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer-executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than presented herein.
In addition, it should be noted that, in the present embodiment, a temperature adjustment device is provided in the energy storage system for adjusting the temperature in the energy storage system. Optionally, the main controller or the cloud platform may be used as an execution main body of this embodiment to execute the control method of the temperature adjustment device, where the main controller is disposed outside the energy storage system, and the cloud platform implements remote control of the energy storage system in a network manner.
Fig. 1 is a flowchart of a control method of a temperature adjustment device according to an embodiment of the present invention, as shown in fig. 1, the method including the steps of:
step S102, obtaining the current electricity price corresponding to the current moment of the current time period and the preset electricity price corresponding to the next time period.
In step S102, a controller is disposed in the energy storage system, and the controller is configured to control a temperature adjustment device in the energy storage system, where the temperature adjustment device at least includes an air conditioning device.
Optionally, the electricity prices are different for different time periods, for example, 8: 30-11: 30 and 18: 00-23: 00 is two peak periods, and the corresponding electricity price is highest; 23: 00-7: 00 is an underestimation time period, and the corresponding electricity price is lowest; 7: 00-8: 30 and 11: 30-18: 00 is two flat periods of time, corresponding to electricity prices between the highest and lowest electricity prices.
In an alternative embodiment, the master controller or the cloud platform may determine the current electricity price corresponding to the current time period and the electricity price corresponding to the next time period by using a message related to the peak-to-valley electricity price issued by the local electricity consumption unit, for example, the current time is 7: 30, the corresponding time interval is a normal time interval, and the electricity price is A; the next time period is the peak time period 8: 30-11: 30, corresponding to a voltage of B, wherein B > a.
It should be noted that, in this embodiment, the time period may be divided based on the peak-to-valley electricity price, and may also be divided in a form customized by the user, for example, the user may regard each hour as one time period, and all the ways of dividing the time period may be applied to this embodiment, which is not limited herein.
Step S104, comparing the current electricity price with the preset electricity price to obtain a first comparison result.
In step S104, the first comparison result represents a comparison result of the current voltage and the preset electricity price, for example, the first comparison result may be that the current electricity price is greater than or equal to the preset electricity price, and the first comparison result may also be that the current electricity price is less than the preset electricity price.
And S106, acquiring a time difference value between the current time and the starting time of the next time period, and comparing the time difference value with a preset time length to obtain a second comparison result, wherein the preset time length is at least determined by the running state of the energy storage system.
In step S106, the second comparison result represents a comparison result of the time difference and the preset duration, for example, the second comparison result may be that the time difference is greater than the preset difference, and the second comparison result may also be that the time difference is smaller than or equal to the preset difference. In addition, the time difference represents a difference between the current time and the next time, for example, the current time is 7: 30, the next period is 8: 30-11: 30, the time difference is 7: 30 and 8: 30, which is 1 hour.
And S108, controlling the running state of the temperature adjusting equipment according to the first comparison result and the second comparison result so as to enable the energy consumption of the energy storage system to be the lowest.
It should be noted that, since the preset time duration is related to the operating state of the energy storage system, in this embodiment, the temperature adjustment device is controlled according to the comparison result between the electricity price and the time difference value and the preset time duration, so that an association relationship is established between the power consumption of the temperature adjustment device and the energy storage system, and therefore, by controlling the operating state of the temperature adjustment device, the energy consumption of the energy storage system can be minimized, thereby achieving the purpose of reducing the energy consumption of the energy storage system. In addition, because the operating state of the temperature regulating device is also related to the electricity prices in different periods, the peak-valley profit of the energy storage system can be improved in consideration of the electricity prices in different periods in the process of controlling the temperature regulating device.
Based on the schemes defined in steps S102 to S108, it can be known that, in the embodiment of the present invention, a manner of controlling the temperature adjustment device according to the power rate pairs in different time periods is adopted, after the current power rate corresponding to the current time of the current time period and the preset power rate corresponding to the next time period are obtained, and the time difference between the current time and the starting time of the next time period is obtained, a first comparison result is obtained by comparing the current power rate and the preset power rate, and a second comparison result is obtained by comparing the time difference with the preset time duration, and finally, the operation state of the temperature adjustment device is controlled according to the first comparison result and the second comparison result, so as to minimize the energy consumption of the energy storage system, where the preset time duration is at least determined by the operation state of the energy storage system.
It is easy to notice that, in the above-mentioned process, the preset duration is related to the operating state of the energy storage system, and the preset duration is also related to the operating state of the temperature adjusting device, so it can be seen that, in this application, there is an incidence relation between the power consumption of the temperature adjusting device and the energy storage system, and therefore, by controlling the operating state of the temperature adjusting device, the energy consumption of the energy storage system can be minimized, thereby achieving the purpose of reducing the energy consumption of the energy storage system. In addition, in the present application, the operation state of the temperature adjustment device is also related to the electricity prices at different time periods, and therefore, in the process of controlling the temperature adjustment device, the peak-valley profit of the energy storage system can be improved in consideration of the electricity prices at different time periods.
Therefore, the scheme provided by the application achieves the purpose of reducing the energy consumption of the energy storage system, the technical effect of improving the benefit of the energy storage system is achieved, and the technical problem that the energy consumption of the energy storage system cannot be effectively reduced in the prior art is solved.
In an optional embodiment, before comparing the time difference with the preset time length to obtain the second comparison result, the main controller or the cloud platform needs to determine the preset time length, and optionally, the main controller or the cloud platform may determine the preset time length in any one of the following manners:
the first method is as follows: and acquiring an input preset value, and determining the preset value as preset duration. Optionally, the user may input a preset duration to the main controller or the cloud platform according to the experience of the user.
The second method comprises the following steps: the preset time is determined according to the heat productivity and the heat dissipation capacity of the battery cell in the energy storage system. Specifically, the method includes the steps of firstly obtaining predicted temperature variation and specific heat capacity of an energy storage system, obtaining heat productivity and heat dissipation capacity of a battery cell in the energy storage system in unit time, then calculating the product of the predicted temperature variation and the specific heat capacity to obtain a first result, calculating the difference between the heat productivity and the heat dissipation capacity to obtain a second result, and finally calculating the ratio of the first result to the second result to obtain preset duration. The predicted temperature variation is a predicted variation of the internal temperature of the energy storage system within a preset time. That is, the preset time period can be calculated by the following formula:
the third method comprises the following steps: the preset time is determined according to the lowest allowable temperature of the battery cells in the energy storage system. Specifically, the current temperature corresponding to the battery cell in the energy storage system and the lowest allowable temperature of the battery cell are firstly acquired, the temperature rise speed or the temperature drop speed in the energy storage system when the temperature adjusting device does not refrigerate is acquired, then, the difference value between the current temperature and the lowest allowable temperature is calculated to obtain a third result, and finally, the ratio of the third result to the temperature rise speed or the temperature drop speed is calculated to obtain the preset duration. And the lowest allowable temperature is the lowest temperature corresponding to the normal operation of the battery cell. That is, the preset time period can be calculated by the following formula:
or,
it should be noted that the weather forecast information may be obtained indirectly through an EMS (Energy Management System)/BMS (Battery Management System), directly collected through a sensor (e.g., a temperature sensor), or determined by obtaining the local weather forecast information through a cloud. Wherein, in the mode of using the temperature sensor to collect, what the temperature sensor collected is the ambient temperature in the energy storage system.
In an alternative embodiment, the current temperature may be determined based on the level of safety protection of the energy storage system. Specifically, the main controller or the cloud platform determines a safety protection level corresponding to the energy storage system, wherein under the condition that the safety protection level is lower than a preset level, an average cell temperature of a cell in the energy storage system is obtained, and the average cell temperature is determined as a current temperature; and under the condition that the safety protection grade is higher than or equal to the preset grade, acquiring the lowest cell temperature or the highest cell temperature of the cells in the energy storage system, and determining the lowest cell temperature or the highest cell temperature as the current temperature.
Optionally, the energy storage system includes a BMS system, which can collect temperature data of the battery cells, RACK, and PACK batteries in the energy storage system, and collect the temperature data to obtain the lowest battery cell temperature, the highest battery cell temperature, and the average battery cell temperature in the energy storage system.
Further, after the preset time duration is determined, the current electricity price and the preset electricity price are compared to obtain a first comparison result, the time difference value and the preset time duration are compared to obtain a second comparison result, and finally the operation state of the temperature adjusting device is controlled according to the first comparison result and the second comparison result. Fig. 2 is a flowchart illustrating an alternative control method of the temperature adjustment device, and in fig. 2, the preset time period is determined by the third method.
Specifically, under the condition that the current electricity price is less than the preset electricity price, determining the change trend of the ambient temperature in the energy storage system when the temperature adjusting equipment does not refrigerate, and under the condition that the change trend of the ambient temperature is a cooling trend and the time difference is less than or equal to the preset time length, controlling the temperature adjusting equipment to enter a heating mode until the temperature of the battery cell in the energy storage system reaches the maximum allowable temperature; and controlling the temperature adjusting equipment to keep the current running state under the condition that the change trend of the environmental temperature is a cooling trend and the time difference value is greater than the preset time length. And the maximum allowable temperature is the maximum temperature corresponding to the normal operation of the battery cell.
Optionally, in fig. 2, the main controller or the cloud platform first obtains a current time (i.e., a current time), and detects whether the user issues a control instruction for controlling the temperature adjustment device in a current time period, and if the user issues the control instruction, the main controller or the cloud platform performs judgment after entering a next time period; if the user does not issue the control instruction, comparing the current electricity price with the preset electricity price, if the current electricity price is smaller than the preset electricity price, continuously judging the ambient temperature change trend of the temperature adjusting device in the energy storage system when the temperature adjusting device does not refrigerate, and if the ambient temperature change trend is a cooling trend, further detecting whether the time difference value is smaller than or equal to the preset duration. And if the time difference is less than or equal to the preset time length, controlling the temperature regulating equipment to heat according to the temperature data of the battery cell so as to reach the maximum allowable temperature of the battery cell. If the time difference is greater than the preset time length, the main controller or the cloud platform control controller does not issue any control instruction, and at the moment, the temperature adjusting device keeps the current running state.
Optionally, under the condition that the current electricity price is less than the preset electricity price, if the ambient temperature variation trend is a temperature rising trend and the time difference is less than or equal to the preset time length, controlling the temperature adjusting device to operate in the refrigeration mode until the temperature of the battery cell in the energy storage system reaches the lowest allowable temperature; and if the change trend of the environmental temperature is a heating trend, and the time difference is greater than the preset time length, controlling the temperature adjusting equipment to keep the current running state. And the lowest allowable temperature is the lowest temperature corresponding to the normal operation of the battery cell. For example, in fig. 2, if the ambient temperature variation trend is a temperature rising trend, and the time difference is less than or equal to the preset time period, the temperature adjustment device is controlled to perform cooling according to the temperature data of the battery cell so as to reach the lowest allowable temperature of the battery cell. If the time difference is greater than the preset time length, the main controller or the cloud platform control controller does not issue any control instruction, and at the moment, the temperature adjusting device keeps the current running state.
Optionally, when the current electricity price is greater than or equal to the preset electricity price, determining an ambient temperature variation trend in the energy storage system when the temperature adjustment device is not refrigerating. Controlling the temperature adjusting equipment to enter a standby state under the condition that the environment temperature variation trend is a temperature rising trend and the time difference value is less than or equal to the preset time length; and controlling the temperature adjusting equipment to keep the current running state under the condition that the environment temperature change trend is a temperature rising trend and the time difference value is greater than the preset time length. For example, in fig. 2, if the current electricity price is greater than or equal to the preset electricity price, the trend of the ambient temperature change in the energy storage system when the temperature adjustment device is not cooling is continuously determined, and if the trend of the ambient temperature change is a temperature rising trend, it is further detected whether the time difference is less than or equal to the preset time duration. And if the time difference is less than or equal to the preset time length, enabling the temperature adjusting equipment to be in a standby state. If the time difference is greater than the preset time length, the main controller or the cloud platform control controller does not issue any control instruction, and at the moment, the temperature adjusting device keeps the current running state.
Optionally, under the condition that the current electricity price is greater than or equal to the preset electricity price, if the ambient temperature variation trend is a cooling trend and the time difference is less than or equal to the preset time length, controlling the temperature adjusting device to enter a standby state; and if the change trend of the environmental temperature is a cooling trend and the time difference value is greater than the preset time length, controlling the temperature adjusting equipment to keep the current running state.
It should be noted that, after the temperature adjustment device is controlled to enter the standby state and the energy storage system enters the next period, it is detected whether the preset electricity price is less than the current electricity price, wherein, in the case that the preset electricity price is less than the current electricity price, the temperature adjustment device is controlled to enter the heating mode or the cooling mode. Namely, when the current electricity price is greater than or equal to the preset electricity price, the main controller or the cloud platform stops the action of the temperature adjusting device, so that the temperature in the energy storage system is increased or reduced to the maximum or minimum allowable temperature, and the refrigeration or heating is carried out after the electricity price is changed and reduced at equal time intervals.
Further, as shown in fig. 2, after the control of the operating state of the temperature adjustment device is completed, the main controller or the cloud platform issues a corresponding control instruction to the energy storage system, and the controller in the energy storage system controls the temperature adjustment device to execute an operation corresponding to the control instruction, and enter the next detection cycle.
It should be noted that, in the process of controlling the temperature adjustment device to enter the heating mode/the cooling mode so as to make the temperature of the battery cell in the energy storage system reach the minimum allowable temperature/the maximum allowable temperature, for the safe operation of the energy storage system, a certain margin is usually set for the minimum allowable temperature/the maximum allowable temperature, for example, the temperature of the battery cell in the energy storage system reaches tmin+δ1To make the temperature of the battery cell in the energy storage system reach tmax-δ2Wherein, tminIs the lowest permissible temperature, delta1A margin corresponding to the lowest allowable temperature, tmaxTo the maximum allowable temperature, delta2The allowance corresponding to the maximum allowable temperature. In addition, the above-described minimum allowable temperature/maximum allowable temperature can be achieved by setting the temperature range allowed by the temperature adjusting device.
In addition, it should be noted that, in this embodiment, the operation state of the temperature adjustment device is adjusted based on the peak-to-valley electricity price difference, which can also be extended to the electricity purchasing cost, for example, when the photovoltaic power generation is excessive, part of the strategy can be changed, and the generated photovoltaic power is fully used to control the cooling or heating of the temperature adjustment device.
In addition, the efficiency of the current energy storage system can be about 86%, namely the loss is about 14% through the scheme provided by the embodiment, so that the cost of the energy storage system loss is reduced, the partial loss of the temperature regulation equipment can be reduced by about 5%, and the efficiency of the energy storage system is improved by 0.5%.
Based on the above, the scheme provided by the application controls the temperature adjusting equipment through the controller, and the adjusting strategy is formulated according to the peak-valley electricity price difference and the temperature rise of the energy storage system, so that the total electricity fee is reduced.
Example 2
There is also provided, according to an embodiment of the present invention, an embodiment of a control apparatus of a temperature adjustment device, in which the temperature adjustment device is provided in an energy storage system for adjusting a temperature within the energy storage system, wherein fig. 3 is a schematic diagram of the control apparatus of the temperature adjustment device according to the embodiment of the present invention, as shown in fig. 3, the apparatus includes: an obtaining module 301, a first comparing module 303, a second comparing module 305 and a control module 307.
The obtaining module 301 is configured to obtain a current electricity price corresponding to a current time of a current time period and a preset electricity price corresponding to a next time period; the first comparison module 303 is configured to compare the current electricity price with a preset electricity price to obtain a first comparison result; a second comparison module 305, configured to obtain a time difference between a current time and a starting time of a next time period, and compare the time difference with a preset time length to obtain a second comparison result, where the preset time length is at least determined by an operating state of the energy storage system; and the control module 307 is configured to control the operation state of the temperature adjustment device according to the first comparison result and the time difference value, so that the energy consumption of the energy storage system is the lowest.
It should be noted that the obtaining module 301, the first comparing module 303, the second comparing module 305 and the control module 307 correspond to steps S102 to S108 in the above embodiment 1, and the four modules are the same as the corresponding steps in the implementation example and the application scenario, but are not limited to the disclosure in the above embodiment 1.
Optionally, the control device of the temperature adjustment apparatus further includes: and the first determining module is used for acquiring the input preset value before the time difference value is compared with the preset time length to obtain a second comparison result, and determining the preset value as the preset time length.
Optionally, the control device of the temperature adjustment apparatus further includes: the device comprises a first acquisition module, a second acquisition module, a first calculation module, a second calculation module and a third calculation module. The first obtaining module is used for obtaining a predicted temperature variation and the specific heat capacity of the energy storage system before comparing the time difference with a preset time length to obtain a second comparison result, wherein the predicted temperature variation is the predicted variation of the internal temperature of the energy storage system within the preset time length; the second acquisition module is used for acquiring the heat productivity and the heat dissipation of the battery cell in the energy storage system in unit time; the first calculation module is used for calculating the product of the predicted temperature variation and the specific heat capacity to obtain a first result; the second calculation module is used for calculating the difference value between the heating value and the heat dissipation value to obtain a second result; and the third calculating module is used for calculating the ratio of the first result to the second result to obtain the preset time length.
Optionally, the control device of the temperature adjustment apparatus further includes: the device comprises a third acquisition module, a fourth calculation module and a fifth calculation module. The third obtaining module is configured to obtain a current temperature corresponding to the battery cell in the energy storage system and a lowest allowable temperature of the battery cell before comparing the time difference with a preset time length and obtaining a second comparison result, where the lowest allowable temperature is a lowest temperature corresponding to normal operation of the battery cell; the fourth acquisition module is used for acquiring the temperature rise speed or the temperature drop speed in the energy storage system when the temperature adjusting equipment does not refrigerate; the fourth calculation module is used for calculating the difference value between the current temperature and the lowest allowable temperature to obtain a third result; and the fifth calculation module is used for calculating the ratio of the third result to the temperature rise speed or the temperature drop speed to obtain the preset time length.
Optionally, the third obtaining module includes: the device comprises a second determination module, a third determination module and a fourth determination module. The second determining module is used for determining the corresponding safety protection level of the energy storage system; the third determining module is used for acquiring the average cell temperature of the cell in the energy storage system under the condition that the safety protection level is lower than the preset level, and determining the average cell temperature as the current temperature; and the fourth determining module is used for acquiring the lowest cell temperature or the highest cell temperature of the cells in the energy storage system under the condition that the safety protection level is higher than or equal to the preset level, and determining the lowest cell temperature or the highest cell temperature as the current temperature.
Optionally, the control module includes: the device comprises a fifth determination module, a first control module and a second control module. The fifth determining module is used for determining the change trend of the ambient temperature in the energy storage system when the temperature adjusting equipment does not refrigerate under the condition that the current electricity price is smaller than the preset electricity price; the first control module is used for controlling the temperature adjusting equipment to enter a heating mode under the condition that the environmental temperature change trend is a cooling trend and the time difference value is less than or equal to the preset time length until the temperature of the battery cell in the energy storage system reaches the highest allowable temperature, wherein the highest allowable temperature is the highest temperature corresponding to the normal operation of the battery cell; and the second control module is used for controlling the temperature adjusting equipment to keep the current running state under the condition that the change trend of the ambient temperature is a cooling trend and the time difference value is greater than the preset time length.
Optionally, the control module includes: the device comprises a sixth determination module, a third control module and a fourth control module. The sixth determining module is used for determining the change trend of the ambient temperature in the energy storage system when the temperature adjusting equipment does not refrigerate under the condition that the current electricity price is smaller than the preset electricity price; the third control module is used for controlling the temperature adjusting equipment to operate in a refrigeration mode under the condition that the ambient temperature variation trend is a temperature rising trend and the time difference is less than or equal to the preset time length until the temperature of the battery cell in the energy storage system reaches the lowest allowable temperature, wherein the lowest allowable temperature is the lowest temperature corresponding to the normal operation of the battery cell; and the fourth control module is used for controlling the temperature adjusting equipment to keep the current running state under the condition that the ambient temperature change trend is a heating trend and the time difference value is greater than the preset time length.
Optionally, the control module includes: the device comprises a seventh determination module, a fifth control module and a sixth control module. The seventh determining module is used for determining the change trend of the ambient temperature in the energy storage system when the temperature adjusting equipment does not refrigerate under the condition that the current electricity price is greater than or equal to the preset electricity price; the fifth control module is used for controlling the temperature adjusting equipment to enter a standby state under the condition that the environment temperature change trend is a temperature rising trend and the time difference value is less than or equal to the preset time length; and the sixth control module is used for controlling the temperature adjusting equipment to keep the current running state under the condition that the ambient temperature change trend is a temperature rising trend and the time difference value is greater than the preset time length.
Optionally, the control module includes: the device comprises an eighth determining module, a seventh controlling module and an eighth controlling module. The eighth determining module is used for determining the ambient temperature change trend in the energy storage system when the temperature adjusting equipment does not refrigerate under the condition that the current electricity price is greater than or equal to the preset electricity price; the seventh control module is used for controlling the temperature adjusting equipment to enter a standby state under the condition that the change trend of the ambient temperature is a cooling trend and the time difference value is less than or equal to the preset time length; and the eighth control module is used for controlling the temperature adjusting equipment to keep the current running state under the condition that the change trend of the ambient temperature is a cooling trend and the time difference value is greater than the preset time length.
Optionally, the control device of the temperature adjustment apparatus further includes: the device comprises a detection module and a ninth control module. The detection module is used for detecting whether the preset electricity price is less than the current electricity price or not after the temperature adjusting equipment is controlled to enter a standby state and the energy storage system enters the next time period; and the ninth control module is used for controlling the temperature adjusting equipment to enter a heating mode or a cooling mode under the condition that the preset electricity price is smaller than the current electricity price.
Example 3
According to another aspect of embodiments of the present invention, there is also provided a nonvolatile storage medium having a computer program stored therein, wherein the computer program is configured to execute the control method of the temperature adjustment apparatus in embodiment 1 described above when running.
Example 4
According to another aspect of embodiments of the present invention, there is also provided a processor for executing a program, wherein the program is configured to execute the control method of the temperature adjustment apparatus in embodiment 1 described above when running.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (11)
1. A control method of a temperature adjustment device provided in an energy storage system for adjusting a temperature within the energy storage system, the method comprising:
acquiring a current electricity price corresponding to the current moment of the current time period and a preset electricity price corresponding to the next time period;
comparing the current electricity price with the preset electricity price to obtain a first comparison result;
acquiring a time difference value between the current time and the starting time of the next time period, and comparing the time difference value with a preset time length to obtain a second comparison result, wherein the preset time length is at least determined by the running state of the energy storage system;
and controlling the running state of the temperature adjusting equipment according to the first comparison result and the second comparison result so as to enable the energy consumption of the energy storage system to be the lowest.
2. The method according to claim 1, wherein before comparing the time difference with a preset time duration to obtain a second comparison result, the method further comprises:
and acquiring an input preset value, and determining the preset value as the preset duration.
3. The method according to claim 1, wherein before comparing the time difference with a preset time duration to obtain a second comparison result, the method further comprises:
acquiring a predicted temperature variation and the specific heat capacity of the energy storage system, wherein the predicted temperature variation is the predicted variation of the internal temperature of the energy storage system within the preset time;
obtaining the heat productivity and the heat dissipation capacity of the battery cell in the energy storage system in unit time;
calculating the product of the predicted temperature variation and the specific heat capacity to obtain a first result;
calculating the difference value between the heating value and the heat dissipation value to obtain a second result;
and calculating the ratio of the first result to the second result to obtain the preset duration.
4. The method according to claim 1, wherein before comparing the time difference with a preset time duration to obtain a second comparison result, the method further comprises:
acquiring a current temperature corresponding to a battery cell in the energy storage system and a lowest allowable temperature of the battery cell, wherein the lowest allowable temperature is a lowest temperature corresponding to the normal operation of the battery cell;
acquiring the temperature rise speed or the temperature drop speed in the energy storage system when the temperature adjusting equipment does not refrigerate;
calculating the difference value between the current temperature and the lowest allowable temperature to obtain a third result;
and calculating the ratio of the third result to the temperature rise speed or the temperature drop speed to obtain the preset duration.
5. The method of claim 4, wherein obtaining the current temperature corresponding to the cells in the energy storage system comprises:
determining a safety protection level corresponding to the energy storage system;
under the condition that the safety protection level is lower than a preset level, acquiring the average cell temperature of a cell in the energy storage system, and determining that the average cell temperature is the current temperature;
and under the condition that the safety protection grade is higher than or equal to the preset grade, acquiring the lowest cell temperature or the highest cell temperature of the cells in the energy storage system, and determining that the lowest cell temperature or the highest cell temperature is the current temperature.
6. The method of claim 1, wherein controlling the operating state of the temperature regulating device according to the first comparison result and the second comparison result comprises:
determining the trend of the change of the ambient temperature in the energy storage system when the temperature adjusting equipment does not refrigerate under the condition that the current electricity price is smaller than the preset electricity price;
when the ambient temperature variation trend is a temperature reduction trend and the time difference is less than or equal to the preset time, controlling the temperature adjusting equipment to enter a heating mode until the temperature of the battery cell in the energy storage system reaches a maximum allowable temperature, wherein the maximum allowable temperature is a maximum temperature corresponding to normal operation of the battery cell;
and controlling the temperature adjusting equipment to keep the current running state under the condition that the environment temperature change trend is the cooling trend and the time difference value is greater than the preset time length.
7. The method of claim 1, wherein controlling the operating state of the temperature regulating device according to the first comparison result and the second comparison result comprises:
determining the trend of the change of the ambient temperature in the energy storage system when the temperature adjusting equipment does not refrigerate under the condition that the current electricity price is smaller than the preset electricity price;
when the ambient temperature variation trend is a temperature rising trend and the time difference is less than or equal to the preset time, controlling the temperature adjusting device to operate in a refrigeration mode until the temperature of the battery cell in the energy storage system reaches a lowest allowable temperature, wherein the lowest allowable temperature is a lowest temperature corresponding to the normal operation of the battery cell;
and controlling the temperature adjusting equipment to keep the current running state under the condition that the environment temperature change trend is the temperature rising trend and the time difference value is greater than the preset time length.
8. The method of claim 1, wherein controlling the operating state of the temperature regulating device according to the first comparison result and the second comparison result comprises:
determining the trend of the change of the ambient temperature in the energy storage system when the temperature adjusting equipment does not refrigerate under the condition that the current electricity price is greater than or equal to the preset electricity price;
controlling the temperature adjusting equipment to enter a standby state under the condition that the environment temperature change trend is a temperature rising trend and the time difference is less than or equal to the preset time length;
and controlling the temperature adjusting equipment to keep the current running state under the condition that the environment temperature change trend is the temperature rising trend and the time difference value is greater than the preset time length.
9. The method of claim 1, wherein controlling the operating state of the temperature regulating device according to the first comparison result and the second comparison result comprises:
determining the trend of the change of the ambient temperature in the energy storage system when the temperature adjusting equipment does not refrigerate under the condition that the current electricity price is greater than or equal to the preset electricity price;
controlling the temperature adjusting equipment to enter a standby state under the condition that the environment temperature change trend is a cooling trend and the time difference value is less than or equal to the preset time length;
and controlling the temperature adjusting equipment to keep the current running state under the condition that the environment temperature change trend is the cooling trend and the time difference value is greater than the preset time length.
10. The method according to claim 8 or 9, characterized in that the method further comprises:
detecting whether the preset electricity price is less than the current electricity price after the controlling the temperature adjusting device to enter the standby state and the energy storage system enters the next period;
and controlling the temperature adjusting equipment to enter a heating mode or a cooling mode under the condition that the preset electricity price is less than the current electricity price.
11. A control apparatus of a temperature adjustment device, characterized in that the temperature adjustment device is provided in an energy storage system for adjusting a temperature within the energy storage system, the apparatus comprising:
the system comprises an acquisition module, a processing module and a display module, wherein the acquisition module is used for acquiring a current electricity price corresponding to the current moment of a current time period and a preset electricity price corresponding to a next time period;
the first comparison module is used for comparing the current electricity price with the preset electricity price to obtain a first comparison result;
the second comparison module is used for acquiring a time difference value between the current time and the starting time of the next time period, and comparing the time difference value with a preset time length to obtain a second comparison result, wherein the preset time length is at least determined by the running state of the energy storage system;
and the control module is used for controlling the running state of the temperature regulating equipment according to the first comparison result and the time difference value so as to enable the energy consumption of the energy storage system to be the lowest.
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