A device protection control method and device and an electric device

Abstract

The application discloses a device protection control method and device and an electric device. The device comprises at least two-stage protection circuits in parallel connection, voltage fluctuation ranges of the protection circuits are different, the method comprises the following steps: determining whether a power consumption peak period is reached; if the power consumption peak period is not reached, monitoring a bus voltage; and according to the current bus voltage and a bus voltage rising rate, determining a protection circuit to be enabled. The application enables a suitable protection circuit based on voltage fluctuation, avoids using a protection circuit with large power all the time, reduces the power consumed by the device protection circuit as a whole, effectively saves energy, prolongs the service life of the protection circuit, and solves the problem that the protection module of the electric device consumes large power.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power grid, in particular to a device protection control method, device and electric equipment. BACKGROUND

[0002] With the development of economy and technology, electronic products are more and more, and the power consumption also increases, so that the power grid voltage load increases, and the power grid voltage fluctuation also increases. In order to carry out voltage stabilization protection, a protection module is arranged between the bus and the switching power supply circuit of the electric equipment. The large power grid voltage fluctuation leads to the increase of the power consumption of the protection module of the electric equipment.

[0003] At present, no effective solution has been proposed for the problem of large power consumption of the protection module of the electric equipment in the prior art. SUMMARY

[0004] The embodiments of the present application provide a device protection control method, device and electric equipment to at least solve the problem of large power consumption of the protection module of the electric equipment in the prior art.

[0005] To solve the above technical problem, the embodiments of the present application provide a device protection control method, wherein the device includes at least two levels of protection circuits in parallel, and each level of protection circuit can withstand different voltage fluctuation ranges. The method comprises the following steps:

[0006] Determining whether it is in a power peak period;

[0007] If it is not in the power peak period, monitoring the bus voltage;

[0008] According to the current bus voltage and the bus voltage rising rate, determining the protection circuit to be enabled.

[0009] Optionally, according to the current bus voltage and the bus voltage rising rate, determining the protection circuit to be enabled, comprising:

[0010] When the current bus voltage is in a preset range, enabling a first protection circuit corresponding to the preset range, wherein the upper limit of the preset range is a first voltage warning value;

[0011] When the current bus voltage is greater than the first voltage warning value, calculating the bus voltage rising rate, if the current bus voltage is greater than a second voltage warning value and the bus voltage rising rate is greater than a rising rate limit value, enabling a protection circuit of a higher level than the first protection circuit; if the current bus voltage is less than or equal to the second voltage warning value or the bus voltage rising rate is less than or equal to the rising rate limit value, enabling the first protection circuit;

[0012] The voltage fluctuation range that the upper-stage protection circuit can withstand is greater than the voltage fluctuation range that the first protection circuit can withstand, and the second voltage early warning value is greater than the first voltage early warning value.

[0013] Optionally, before determining whether it is in the power peak period, the method further comprises:

[0014] obtaining the number of power users and the power grid load of the area where the device is located in different time periods;

[0015] For any time period, if the ratio of the number of power users in the time period to the total number of power users in the area where the device is located is greater than or equal to a first preset ratio, and the ratio of the power grid load in the time period to the preset power grid load in the area where the device is located is greater than or equal to a second preset ratio, the time period is determined to be a power peak period.

[0016] Optionally, after determining whether it is in the power peak period, the method further comprises:

[0017] If it is in the power peak period, the protection circuit with the largest voltage fluctuation range is enabled, and the device is frequency-reduced.

[0018] Optionally, frequency-reducing the device comprises:

[0019] obtaining a current specified parameter value;

[0020] determining a frequency-reduction amplitude corresponding to the current specified parameter value according to a corresponding relationship between the specified parameter value and the frequency-reduction amplitude;

[0021] After the device meets the operation requirement, the device is frequency-reduced according to the determined frequency-reduction amplitude, and then the step of obtaining the current specified parameter value is executed until a stop frequency-reduction condition is met.

[0022] Optionally, if the protection circuit with the largest voltage fluctuation range is enabled, the method further comprises:

[0023] determining whether the number of times that the current bus voltage is greater than the maximum voltage early warning value is detected within a continuous preset time reaches a preset number of times;

[0024] If yes, the protection circuit with the largest voltage fluctuation range is kept enabled until the next non-power peak period.

[0025] The embodiment of the application also provides a device protection control device, the device comprising at least two-stage protection circuits in parallel, the voltage fluctuation ranges of the protection circuits are different, and the device comprises:

[0026] a determination module configured to determine whether it is in a power peak period;

[0027] a monitoring module, configured to monitor the bus voltage if the current time is not in the power peak period;

[0028] a control module, configured to determine the protection circuit to be enabled according to the current bus voltage and the bus voltage rising rate.

[0029] The embodiment of the present application further provides a power utilization equipment, which comprises the equipment protection control device, each stage of protection circuit is connected to the equipment protection control device through a corresponding switching device, the input end of each stage of protection circuit is connected to a bus, and the output end of each stage of protection circuit is connected to an equipment operation circuit.

[0030] Optionally, the switching device comprises a switching tube and a relay.

[0031] The first pole of the switching tube is connected to the equipment protection control device.

[0032] The second pole of the switching tube is connected to the anode of a first diode, the cathode of the first diode is connected to the power supply, the relay is connected in parallel with the first diode, and the relay is further connected to the corresponding protection circuit.

[0033] The third pole of the switching tube is grounded.

[0034] Optionally, the protection circuit capable of bearing the voltage fluctuation range other than the maximum comprises a voltage stabilizing diode and a second diode, the anode of the voltage stabilizing diode is connected to the bus, the anode of the voltage stabilizing diode is further connected to the equipment operation circuit, the cathode of the voltage stabilizing diode is connected to the cathode of the second diode, and the anode of the second diode is connected to the equipment operation circuit.

[0035] The embodiment of the present application further provides a nonvolatile computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the steps of the method.

[0036] The technical scheme of the present application is applied to the equipment, at least two stages of protection circuits are arranged in parallel, the voltage fluctuation ranges capable of being borne by the protection circuits are different, if the current time is not in the power peak period, the protection circuit to be enabled in the equipment is determined according to the current bus voltage and the bus voltage rising rate. The appropriate protection circuit is enabled based on the voltage fluctuation, the power consumption of the protection circuit of the equipment is reduced, the service life of the protection circuit is prolonged, and the problem that the power consumption of the protection module of the power utilization equipment is large is solved. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a flow chart of the equipment protection control method provided by the embodiment one of the present application.

[0038] Figure 2 is a schematic diagram of the air conditioner protection control provided by the second embodiment of the present application;

[0039] Figure 3 is a schematic diagram of the air conditioner protection control provided by the second embodiment of the present application;

[0040] Figure 4 is a schematic diagram of the air conditioner protection control provided by the second embodiment of the present application;

[0041] Figure 5 is a schematic diagram of the air conditioner protection control provided by the second embodiment of the present application;

[0042] Figure 6 is a schematic diagram of the air conditioner protection control provided by the second embodiment of the present application; DETAILED DESCRIPTION

[0043] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0044] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and the drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0045] The optional embodiments of the present application will be described in detail below with reference to the drawings.

[0046] Embodiment One

[0047] The device in the embodiment of the present application comprises at least two levels of protection circuits, each level of protection circuit can withstand different voltage fluctuation ranges, and the at least two levels of protection circuits are connected in parallel. The device can be an electric device such as an air conditioner which needs to be provided with a protection circuit. The appropriate protection circuit can be enabled according to the actual power grid voltage condition. In actual application, the original protection circuit in the device can be retained as a main protection circuit, which can withstand the largest voltage fluctuation range and is suitable for the time when the voltage fluctuation is large. In addition to the main protection circuit, the other protection circuits are relatively simplified protection circuits, which are suitable for the time when the voltage fluctuation is small, and the simplified protection circuits are more energy-saving compared with the main protection circuit.

[0048] The embodiment provides a device protection control method, Figure 1 The flowchart of the device protection control method provided by the embodiment one of the present application is shown in Figure 1 The method comprises the following steps:

[0049] S101, determining whether it is in a power peak period.

[0050] S102, if it is not in the power peak period, monitoring the bus voltage.

[0051] S103, determining the protection circuit to be enabled according to the current bus voltage and the bus voltage rising rate.

[0052] The power peak period is obtained by big data processing of the power grid data of the region where the device is located. Specifically, the number of power users and the power grid load of the region where the device is located in different time periods are obtained; for any time period, if the ratio of the number of power users in the time period to the total number of power users in the region where the device is located is greater than or equal to a first preset ratio, and the ratio of the power grid load in the time period to the preset power grid load in the region where the device is located is greater than or equal to a second preset ratio, the time period is determined as the power peak period. Thus, at least one power peak period corresponding to the region where the device is located can be obtained. When the device is controlled to operate, the current time period can be compared with the at least one power peak period to determine whether the current time period is the power peak period.

[0053] The first preset ratio and the second preset ratio can be set according to the actual situation. For example, the total number of power users in city A is 2 million, the preset power grid load in city A is 10 million kilowatts, when more than 1 million power users use electricity at the same time, and the power grid load is greater than 7 million kilowatts, the time period is considered as the power peak period.

[0054] In the power peak period, due to the large increase or decrease of the power grid load, the power grid voltage fluctuates greatly. The power grid voltage in the non-power peak period is relatively stable.

[0055] The embodiment sets at least two levels of protection circuits in parallel in the device, each level of protection circuit can withstand different voltage fluctuation ranges, if not in the power peak period, according to the current bus voltage and the bus voltage rising rate to determine the protection circuit to be enabled in the device. Based on the voltage fluctuation condition, the appropriate protection circuit is enabled, avoiding using the protection circuit with large power all the time, thereby reducing the power consumed by the protection circuit of the device as a whole, effectively saving energy, prolonging the service life of the protection circuit, and solving the problem that the protection module of the power device consumes large power.

[0056] In one embodiment, according to the current bus voltage and the bus voltage rising rate, the protection circuit to be enabled is determined, comprising:

[0057] When the current bus voltage is in a preset range, a first protection circuit corresponding to the preset range is enabled, wherein the upper limit of the preset range is a first voltage warning value;

[0058] When the current bus voltage is greater than the first voltage warning value, the bus voltage rising rate is calculated, if the current bus voltage is greater than a second voltage warning value and the bus voltage rising rate is greater than a rising rate limit value, a higher level protection circuit of the first protection circuit is enabled; if the current bus voltage is less than or equal to the second voltage warning value or the bus voltage rising rate is less than or equal to the rising rate limit value, the first protection circuit is enabled.

[0059] Wherein, the voltage fluctuation range that the higher level protection circuit can withstand is greater than the voltage fluctuation range that the first protection circuit can withstand, and the second voltage warning value is greater than the first voltage warning value. The preset range, the first voltage warning value, the second voltage warning value and the rising rate limit value can be set according to the actual situation. The corresponding preset range can be set for each level of protection circuit.

[0060] In the embodiment, when the bus voltage is in an upward trend and the bus voltage rising rate is greater than the rising rate limit value, the protection circuit that can withstand the largest voltage fluctuation range is enabled, which ensures that the protection circuit is switched according to the voltage fluctuation condition, and the protection effect and the energy saving effect are considered. If the protection circuit that can withstand the largest voltage fluctuation range is enabled, the device can also be frequency-reduced to reduce the power grid load.

[0061] In one embodiment, after determining whether it is in the power peak period, it further comprises: if it is in the power peak period, the protection circuit that can withstand the largest voltage fluctuation range is enabled, and the device is frequency-reduced. In the power peak period, the protection circuit that can withstand the largest voltage fluctuation range is enabled in the embodiment, which can effectively protect the device, and control the device to run at a reduced frequency, thereby reducing the power grid load.

[0062] Further, the frequency reduction of the device comprises: obtaining a current specified parameter value; determining a frequency reduction amplitude corresponding to the current specified parameter value according to a corresponding relationship between the specified parameter value and the frequency reduction amplitude; after the device meets the operation requirement, reducing the frequency of the device according to the determined frequency reduction amplitude, and then returning to the step of obtaining the current specified parameter value until a stop frequency reduction condition is met.

[0063] If the device is an air conditioner, the device meeting the operation requirement means that the indoor environment temperature reaches a set temperature, and if the device is a refrigerator, the device meeting the operation requirement means that the chamber temperature reaches a set temperature. The stop frequency reduction condition can be: reaching a preset frequency reduction times, reducing to a minimum allowed operation frequency, or a bus voltage being less than a preset voltage.

[0064] For example, if the device is an air conditioner, the specified parameters include: the number of people in the room where the air conditioner is located, the current bus voltage, the indoor environment temperature, and the set temperature. Specifically, the frequency reduction of the air conditioner comprises: obtaining a current specified parameter value, determining a frequency reduction amplitude corresponding to the current specified parameter value according to a corresponding relationship between the specified parameter value and the frequency reduction amplitude; after the indoor environment temperature reaches the set temperature, reducing the frequency of the air conditioner according to the determined frequency reduction amplitude, and then returning to the step of obtaining the current specified parameter value until a stop frequency reduction condition is met.

[0065] The present embodiment can reduce the frequency of the device without affecting the normal operation of the device, thereby reducing the load of the power grid.

[0066] If the protection circuit with the largest tolerable voltage fluctuation range is enabled, the method further comprises: determining whether the number of times that the current bus voltage is greater than the maximum voltage warning value is detected within a preset time reaches a preset number of times; if yes, maintaining the enabled protection circuit with the largest tolerable voltage fluctuation range until the next off-peak period; and if no, enabling a next level protection circuit of the protection circuit with the largest tolerable voltage fluctuation range. The preset time and the preset number of times can be set according to actual conditions, for example, the preset time is 1 minute and the preset number of times is 3. The next level protection circuit can tolerate a smaller voltage fluctuation range. The present embodiment maintains the enabled protection circuit with the largest tolerable voltage fluctuation range in the case of large voltage fluctuation of the power grid, thereby achieving effective protection of the device.

[0067] Embodiment Two

[0068] The present embodiment takes an air conditioner as an example to illustrate the above-mentioned device protection control method, however, it is worth noting that the specific embodiment is only for better illustrating the present application and does not constitute an improper limitation on the present application. The same or corresponding term explanations as the above-mentioned embodiments are not repeated here.

[0069] As Figure 2 shown, for the principle of air conditioning protection control schematic diagram, air conditioning control module 10 and air conditioning operation circuit 20 parallel connection protection circuit 1~n, protection circuit 1~n can withstand voltage fluctuation range decreases in turn. Air conditioning control module 10 and communication module 11, infrared detection module 12, voltage detection module 13 and temperature detection module 14 are connected. Air conditioning remote controller 15 and big data processing end 16 are connected to the communication module 11.

[0070] Infrared detection module 12 is used to detect the number of people in the room. Voltage detection module 13 is used to detect the bus voltage. Temperature detection module 14 is used to detect the indoor environment temperature. Air conditioning remote controller 15 is used to transmit the set temperature input by the user to the communication module 11. Big data processing end 16 is used to transmit the relevant information of the peak period of electricity consumption to the communication module 11.

[0071] As Figure 3 shown, for the circuit structure principle diagram of air conditioning, rectifier filter circuit 30 carries on the rectification filtering to the power grid alternating current, Vbulk indicates the bus voltage after rectification filtering.

[0072] As Figure 4 shown, for the flow chart of air conditioning protection control, taking two protection circuits as an example, protection circuit 1 is the main protection circuit, which can withstand a larger voltage fluctuation range, is the original protection circuit in air conditioning, and is suitable for the moment of larger voltage fluctuation; Protection circuit 2 is a more simplified protection circuit, which can withstand a smaller voltage fluctuation range, and is suitable for the moment of smaller voltage fluctuation. It includes the following steps:

[0073] S401, big data processing end 16 combines big data processing technology to collect, analyze and process the number of electricity users and power grid load in a certain area at different time periods to determine whether it is a peak period of electricity consumption in the area at different time periods.

[0074] S402, using the communication module 11 of air conditioning and big data processing end 16 communication, the above information is transmitted to air conditioning for control.

[0075] S403, the communication module 11 transmits the above information to the air conditioning control module 10, which determines the protection circuit to be enabled according to whether it is in the peak period of electricity consumption, and enables the protection circuit. If it is in the peak period of electricity consumption, enter S408; if it is not in the peak period of electricity consumption, enter S404.

[0076] S404, voltage detection module 13 continuously detects the bus voltage (i.e. the voltage of the power input end) and sends the detection result to the air conditioning control module 10.

[0077] S405, the air conditioner control module 10 judges whether the bus voltage is greater than the first voltage warning value, if yes, enter S406, if not, enter S413.

[0078] S406, the air conditioner control module 10 calculates the bus voltage rising rate. r = dv / dt, r represents the bus voltage rising rate, dv represents the bus voltage fluctuation value, dt represents the voltage detection time.

[0079] S407, the air conditioner control module 10 judges whether the bus voltage is greater than the second voltage warning value and the bus voltage rising rate is greater than the rising rate limit value, if yes, enter S408, if not, enter S413. For example, the rising rate limit value is 70%.

[0080] S408, the protection circuit 1 is enabled, which can better cope with the challenge of large voltage fluctuation.

[0081] S409, after enabling the protection circuit 1, the infrared detection module 12, the voltage detection module 13 and the temperature detection module 14 transmit the respective detection data to the air conditioner control module 10, and the communication module 11 transmits the set temperature from the air conditioner remote controller 15 to the air conditioner control module 10.

[0082] S410, the air conditioner control module 10 controls the air conditioner to run at a reduced frequency according to the received data according to the pre-established relationship F(f) = x(P, V, K1, K2), so as to reduce the power grid load. Wherein, f represents the air conditioner running frequency, P represents the number of people in the room detected by the infrared detection module 12, V represents the bus voltage value detected by the voltage detection module 13, K1 represents the indoor environment temperature detected by the temperature detection module 14, and K2 represents the set temperature received by the communication module 11 from the air conditioner remote controller 15.

[0083] The different frequency reduction amplitudes can be set in advance according to different number of people in the room, bus voltage, indoor environment temperature and set temperature. For example, if the number of people in the room is small (1-3 people), the bus voltage is stable, K1 and K2 differ by a small amount (3-5℃), and the set temperature is reached, it can be set to reduce the frequency by 5Hz. If the number of people in the room is large (more than 5 people), the bus voltage fluctuates greatly, K1 and K2 differ greatly (more than 10℃), and the set temperature is reached, it can be set to reduce the frequency by 3Hz.

[0084] S411, the air conditioner is operated by the air conditioner operating circuit 20. At the same time, it can return to S401 to continue to judge the protection circuit to be enabled.

[0085] S412, after enabling the protection circuit 1, the voltage detection module 13 continuously detects the bus voltage, when there are three times greater than the second voltage warning value in 1min time (T time) within the bus voltage fluctuation, return to S408 to continue to maintain the working state of the protection circuit 1, at this time the protection circuit 1 will work, the working time through a power peak period, until the next non-power peak period, the air conditioning control module 10 again according to the feedback of the voltage detection module 13 to determine whether to run the protection circuit 1 or the protection circuit 2. When not meet 1min time within the bus voltage fluctuation, there are three times greater than the second voltage warning value, enter S413. That is, after enabling the protection circuit 1, the device is reduced in frequency, while continuing to monitor the fluctuation of the bus voltage to determine the working time of the protection circuit 1.

[0086] S413, enable the protection circuit 2. The simplified protection circuit can play a role in energy saving, while reducing the working time of the protection circuit 1, prolonging the service life of the protection circuit 1.

[0087] Among them, the first voltage warning value can be set to 70% of the upper limit voltage value of the protection circuit 2, and the second voltage warning value can be set to 90% of the upper limit voltage value of the protection circuit 2. The upper limit voltage value of the protection circuit 2 can be set according to the peak value of the alternating current power supply, the actual power supply and the key device withstand voltage value in the subsequent strong current circuit.

[0088] If a three-level or more than three-level protection circuit is set, that is, at least two simplified protection circuits are added, the control principle is the same as that of adding one simplified protection circuit, which will not be repeated. Exemplary, the voltage fluctuation range that can be tolerated is in turn large to small: protection circuit 1, protection circuit 2 and protection circuit 3, if the current protection circuit 3 is enabled, when the bus voltage is greater than the corresponding voltage warning value A and the bus voltage rising rate is greater than 60%, it can be switched to the protection circuit 2, if the current protection circuit 2 is enabled, when the bus voltage is greater than the corresponding voltage warning value B and the bus voltage rising rate is greater than 70%, it can be switched to the protection circuit 1, and the voltage warning value B is greater than the voltage warning value A.

[0089] At least two levels of protection circuit are set in parallel in the electrical equipment, through big data analysis of the number of power users and power grid load in a certain area in a certain period of time, the power peak period is obtained, and the corresponding protection circuit is enabled combined with big data information, which reduces the power consumption of the protection circuit and effectively saves energy. In the power peak period, the device is controlled to run at a reduced frequency to reduce the power grid load.

[0090] Example three

[0091] Based on the same inventive concept, the embodiment provides a device protection control device, which can be used to implement the device protection control device method in the above embodiment. The device can be implemented by software and / or hardware, and the device can be generally integrated into a controller of the power utilization device. The device includes at least two levels of protection circuits in parallel connection, and each level of protection circuit can withstand a different voltage fluctuation range.

[0092] Figure 5 Figure 1 is a structural block diagram of a device protection control device provided by the third embodiment of the present application, as shown in the figure, the device includes: Figure 5

[0093] A determination module 51 is configured to determine whether a power utilization peak period is present.

[0094] A monitoring module 52 is configured to monitor a bus voltage if the power utilization peak period is not present.

[0095] A control module 53 is configured to determine a protection circuit to be enabled according to a current bus voltage and a bus voltage rising rate.

[0096] Optionally, the control module 53 is specifically configured to:

[0097] when the current bus voltage is in a preset range, a first protection circuit corresponding to the preset range is enabled, wherein an upper limit of the preset range is a first voltage warning value;

[0098] when the current bus voltage is greater than the first voltage warning value, a bus voltage rising rate is calculated, if the current bus voltage is greater than a second voltage warning value and the bus voltage rising rate is greater than a rising rate limit value, a higher level protection circuit of the first protection circuit is enabled, and if the current bus voltage is less than or equal to the second voltage warning value or the bus voltage rising rate is less than or equal to the rising rate limit value, the first protection circuit is enabled.

[0099] wherein the higher level protection circuit can withstand a voltage fluctuation range greater than a voltage fluctuation range that the first protection circuit can withstand, and the second voltage warning value is greater than the first voltage warning value.

[0100] Optionally, the device can further include an acquisition module configured to acquire a number of power utilization users and a power grid load of a region where the device is located in different time periods before determining whether the power utilization peak period is present, and for any time period, if a ratio of the number of power utilization users in the time period to a total number of power utilization users of the region where the device is located is greater than or equal to a first preset ratio, and a ratio of the power grid load in the time period to a preset power grid load of the region where the device is located is greater than or equal to a second preset ratio, the time period is determined as the power utilization peak period.

[0101] ​Optionally, the device further comprises a frequency reduction module configured to enable the protection circuit with the largest voltage fluctuation range if the current time is in the power peak period, and to reduce the frequency of the device.

[0102] Optionally, the frequency reduction module is specifically configured to acquire a current specified parameter value, determine a frequency reduction range corresponding to the current specified parameter value according to a corresponding relationship between the specified parameter value and the frequency reduction range, and reduce the frequency of the device according to the determined frequency reduction range after the device meets the operation requirement, and then return to the step of acquiring the current specified parameter value until a stop frequency reduction condition is met.

[0103] Optionally, the device further comprises a maintaining module configured to, if the protection circuit with the largest voltage fluctuation range is enabled, determine whether the number of times that the current bus voltage is greater than the maximum voltage warning value within a continuous preset time reaches a preset number of times, and maintain the enabled protection circuit with the largest voltage fluctuation range until the next non-power peak period if the number of times reaches the preset number of times.

[0104] The device can execute the method provided by the embodiments of the present application, and has the corresponding function modules and beneficial effects of the method. Technical details not described in the embodiments can be referred to the method provided by the embodiments of the present application.

[0105] Embodiment Four

[0106] The embodiment provides a power utilization device, which comprises the device protection control device described in the above embodiments, each stage of protection circuit is connected to the device protection control device through a corresponding switching device, the input end of each stage of protection circuit is connected to a bus, and the output end of each stage of protection circuit is connected to a device operation circuit. Specifically, the output end of each stage of protection circuit is connected to a switching power supply circuit in the device operation circuit to realize protection of the switching power supply. The power utilization device can be an air conditioner, a refrigerator or the like.

[0107] The embodiment sets at least two stages of protection circuits in parallel in the device, the voltage fluctuation ranges of the protection circuits are different, a suitable protection circuit can be enabled based on the voltage fluctuation, and the use of a protection circuit with large power is avoided, so that the power consumed by the device protection circuit is reduced as a whole, energy is effectively saved, and the service life of the protection circuit is prolonged.

[0108] The switching device includes a switching transistor and a relay. The first terminal of the switching transistor is connected to the equipment protection and control device. The second terminal of the switching transistor is connected to the anode of a first diode, the cathode of the first diode is connected to the power supply, the relay is connected in parallel with the first diode, and the relay is also connected to the corresponding protection circuit. The third terminal of the switching transistor is grounded. The first diode is used to prevent reverse voltage and current. The switching transistor can be a transistor or a MOSFET, etc. The above switching device can effectively enable or disable the corresponding protection circuit.

[0109] The protection circuit, which can withstand voltage fluctuations within its maximum range, includes a Zener diode and a second diode. The anode of the Zener diode is connected to the busbar and also to the equipment's operating circuit. The cathode of the Zener diode is connected to the cathode of the second diode, and the anode of the second diode is connected to the equipment's operating circuit. The second diode prevents reverse voltage and current. The Zener diode operates in reverse breakdown mode; when the busbar voltage exceeds its reverse breakdown voltage, the Zener diode breaks down in reverse, stabilizing the voltage required by the subsequent operating circuit at the Zener diode's stable voltage. Using a Zener diode and a second diode to form a simplified protection circuit allows for relatively energy-efficient busbar voltage regulation.

[0110] Taking air conditioners as an example, such as Figure 6 The diagram shows the topology of the protection circuit for an air conditioner. Taking two protection circuits as examples, protection circuit 1 is the main protection circuit, which can withstand a larger range of voltage fluctuations. It is the original protection circuit in the air conditioner and is suitable for times with large voltage fluctuations. Protection circuit 2 is a more streamlined protection circuit, which can withstand a smaller range of voltage fluctuations and is suitable for times with smaller voltage fluctuations.

[0111] If protection circuit 1 is enabled, the rectified and filtered bus voltage Vbulk is divided by resistors R1 and R2 in series. The voltage of R2 is applied to the feedback terminal R of the voltage regulator module IC1 (e.g., TL431). The voltage at the feedback terminal R = Vbulk × R2 / (R1 + R2). When the voltage of R2 is less than the feedback voltage of IC1 (a fixed value), IC1 does not conduct. At this time, VCC3 supplies power to the subsequent air conditioning operation circuit 20, ensuring the normal operation of the subsequent operation circuit. When the voltage of R2 is greater than the feedback voltage of IC1, IC1 conducts, the K terminal is pulled low, the base of PNP transistor VT3 also becomes low, the emitter voltage of VT3 is greater than the base voltage, VT3 conducts, the level of VCC3 is pulled to ground, and the subsequent air conditioning operation circuit 20 stops working, realizing overvoltage protection. Capacitor C1 is a filter capacitor, and resistor R3 is a current-limiting resistor used to protect IC1.

[0112] Protection circuit 2 utilizes Zener diodes D2 and D3 to regulate Vbulk, keeping it within the required range. The appropriate diodes can be selected based on specific needs. D2 operates in reverse breakdown mode; when Vbulk exceeds its reverse breakdown voltage, D2 breaks down in reverse, stabilizing the voltage required by subsequent circuitry at the stable voltage of D2. D3 prevents reverse voltage and current flow.

[0113] Air conditioning control module 10 via Figure 4 The process shown determines the protection circuit to be activated, and sends high and low level signals to NPN transistors VT1 and VT2 respectively. Specifically, a high level signal is sent to the switching device corresponding to the protection circuit to be activated, and a low level signal is sent to the switching device corresponding to the protection circuit to be deactivated.

[0114] When VT1 receives a high-level signal, VT1 conducts, energizing relay K1 via VCC1. Relay K1 then engages, and protection circuit 2 begins operation. When VT1 receives a low-level signal, VT1 is cut off, relay K1 does not engage, protection circuit 2 is short-circuited, and it stops working.

[0115] When VT2 receives a high-level signal, VT2 conducts, energizing relay K2 via VCC2. Relay K2 then engages, and protection circuit 1 begins operation. When VT2 receives a low-level signal, VT2 is cut off, relay K2 does not engage, protection circuit 1 is short-circuited, and it stops working.

[0116] D1 and D4 are used to prevent reverse voltage and current. Relays K1 and K2 can be replaced with other suitable switching devices. Transistors VT1, VT2, and VT3 can be replaced with MOSFETs.

[0117] Example 5

[0118] This embodiment provides a non-volatile computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the method described in the above embodiment.

[0119] This embodiment also provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method described in the above embodiment.

[0120] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0121] Those skilled in the art can clearly understand the implementation of the various embodiments by means of software and necessary general hardware platforms through the above description of the embodiments, and of course, the embodiments can also be implemented by hardware. Based on such understanding, the above technical solutions, essentially or in other words, the part of the prior art that makes a contribution, can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in the various embodiments or some parts of the embodiments.

[0122] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A method for protecting and controlling equipment, characterized in that, The device includes at least two levels of protection circuits connected in parallel, each level of protection circuit having a different voltage fluctuation range to withstand; the method includes: Determine if it is during peak electricity consumption periods; If it is not during peak electricity consumption periods, monitor the bus voltage; Determine which protection circuit to activate based on the current bus voltage and the rate of rise of the bus voltage; If it is during peak electricity consumption period, the protection circuit with the largest tolerable voltage fluctuation range will be activated, and the frequency of the device will be reduced.

2. The method according to claim 1, characterized in that, Based on the current bus voltage and the rate of rise of the bus voltage, determine the protection circuits to be activated, including: When the current bus voltage is within a preset range, the first protection circuit corresponding to the preset range is activated, wherein the upper limit of the preset range is the first voltage warning value; When the current bus voltage is greater than the first voltage warning value, the bus voltage rise rate is calculated. If the current bus voltage is greater than the second voltage warning value and the bus voltage rise rate is greater than the rise rate limit, the next-level protection circuit of the first protection circuit is activated. If the current bus voltage is less than or equal to the second voltage warning value or the bus voltage rise rate is less than or equal to the rise rate limit, the first protection circuit is activated. The voltage fluctuation range that the upper-level protection circuit can withstand is greater than that that the first protection circuit can withstand, and the second voltage warning value is greater than the first voltage warning value.

3. The method according to claim 1, characterized in that, Before determining whether it is a peak electricity consumption period, the following is also included: Obtain the number of electricity users and grid load in the area where the equipment is located at different time periods; For any given time period, if the ratio of the number of electricity users in that time period to the total number of electricity users in the area where the equipment is located is greater than or equal to a first preset ratio, and the ratio of the grid load in that time period to the preset grid load in the area where the equipment is located is greater than or equal to a second preset ratio, then that time period is determined to be a peak electricity consumption period.

4. The method according to claim 1, characterized in that, The frequency reduction of the device includes: Get the current value of the specified parameter; Based on the correspondence between specified parameter values ​​and frequency reduction amplitude, determine the frequency reduction amplitude corresponding to the current specified parameter value; After the device meets the operating requirements, the frequency of the device is reduced according to the determined reduction range, and then the process returns to the step of obtaining the current specified parameter value until the condition for stopping the reduction is met.

5. The method according to any one of claims 1 to 4, characterized in that, If the protection circuit that is activated has the largest tolerable voltage fluctuation range, it also includes: Determine whether the number of times the current bus voltage is detected to be greater than the maximum voltage warning value within a consecutive preset time period has reached the preset number; If so, the protection circuit with the largest tolerable voltage fluctuation range will remain activated until the next off-peak electricity period.

6. A device for protecting and controlling equipment, characterized in that, The device includes at least two levels of protection circuits connected in parallel, each level of protection circuit having a different voltage fluctuation range to withstand. The device includes: The determination module is used to determine whether it is during peak electricity consumption periods; The monitoring module is used to monitor the bus voltage if it is not during peak electricity consumption periods; The control module is used to determine the protection circuit to be activated based on the current bus voltage and the rate of rise of the bus voltage. The frequency reduction module is used to activate the protection circuit with the largest tolerable voltage fluctuation range and reduce the frequency of the device during peak electricity consumption periods.

7. An electrical appliance, characterized in that, include: The equipment protection and control device according to claim 6, wherein each level of protection circuit is connected to the equipment protection and control device through a corresponding switching device; the input terminal of each level of protection circuit is connected to the bus, and the output terminal of each level of protection circuit is connected to the equipment operation circuit.

8. The electrical equipment according to claim 7, characterized in that, The switching devices include: switching transistors and relays; The first terminal of the switching transistor is connected to the equipment protection and control device; The second terminal of the switching transistor is connected to the positive terminal of the first diode, the negative terminal of the first diode is connected to the power supply, the relay is connected in parallel with the first diode, and the relay is also connected to the corresponding protection circuit. The third terminal of the switching transistor is grounded.

9. The electrical equipment according to claim 7, characterized in that, The protection circuit that can withstand voltage fluctuations beyond the maximum range includes: a Zener diode and a second diode; The positive terminal of the Zener diode is connected to the busbar, and the positive terminal of the Zener diode is also connected to the equipment operating circuit. The negative terminal of the Zener diode is connected to the negative terminal of the second diode, and the positive terminal of the second diode is connected to the equipment operating circuit.

10. A non-volatile computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

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