CN117353442B - Switching control method of dual-power auxiliary switching device - Google Patents
Switching control method of dual-power auxiliary switching device Download PDFInfo
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- CN117353442B CN117353442B CN202311645137.8A CN202311645137A CN117353442B CN 117353442 B CN117353442 B CN 117353442B CN 202311645137 A CN202311645137 A CN 202311645137A CN 117353442 B CN117353442 B CN 117353442B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/102—Parallel operation of dc sources being switching converters
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Abstract
The invention provides a switching control method of a dual-power auxiliary switching device. The dual-power auxiliary switching device comprises a load, a switch power supply group, a switch, a signal detection device, a controller and a dual-power auxiliary switching circuit; the power supply control signal output end of the signal detection device is electrically connected with the power supply control signal input end of the switch power supply group through a switch; the detection signal output end of the signal detection device is electrically connected with the detection signal input end of the controller; the switching control instruction output end of the controller is electrically connected with the switching instruction signal input end of the dual-power auxiliary switching circuit; the switching control signal output end of the dual-power auxiliary switching circuit is electrically connected with the control signal input end of the switch; and the power signal output end of the switch power supply group is respectively and electrically connected with the controller and the load. The invention can reduce the influence of transient current and voltage fluctuation and improve the efficiency and stability of power supply switching.
Description
Technical Field
The invention relates to the technical field of power auxiliary switching, in particular to a switching control method of a dual-power auxiliary switching device.
Background
In many important systems, such as medical devices, industrial control systems, safety systems, etc., it is necessary to ensure a continuous supply of power to ensure stable operation of the system. These systems need to be able to switch seamlessly to the backup power source when the primary power source fails, to prevent any possible interruption. However, the existing power switching device is often complicated in structure and high in cost, and transient current or voltage fluctuation may be generated in the power switching process, which may adversely affect the system performance.
In addition, some power switching devices can automatically switch power, but may not guarantee the quality and stability of the power during the switching process due to the limitations of the internal structure or control method thereof. This problem may be more pronounced, especially when handling high power or critical loads.
Therefore, it is necessary to study an auxiliary switching device and a switching control method that have a simple structure, are easy to control, and are capable of smoothly switching between the dual power supplies. Such an apparatus and method should be able to reduce the effects of transient current and voltage fluctuations while improving the efficiency and stability of power switching.
Disclosure of Invention
The invention provides a switching control method of a dual-power auxiliary switching device, which is used for solving the problems of poor power reliability, insufficient power switching stability, insufficient continuous power supply capability of a system and insufficient intelligent management degree in a power system in the prior art:
In a first aspect, the present invention provides a switching control method for a dual-power auxiliary switching device, where the dual-power auxiliary switching device includes a load, a switching power supply group, a first switch, a signal detection device, a controller, and a dual-power auxiliary switching circuit; the power control signal output end of the signal detection device is electrically connected with the power control signal input end of the switch power supply group through a first switch; the detection signal output end of the signal detection device is electrically connected with the detection signal input end of the controller; the switching control instruction output end of the controller is electrically connected with the switching instruction signal input end of the dual-power auxiliary switching circuit; the switching control signal output end of the dual-power auxiliary switching circuit is electrically connected with the control signal input end of the first switch; and the power signal output end of the switch power supply group is respectively and electrically connected with the controller and the load.
Further, the switching power supply group comprises a first switching power supply and a second switching power supply; the power supply control signal input ends of the first switching power supply and the second switching power supply are the power supply control signal input ends of the switching power supply group.
Further, the signal detection device comprises a transformer set, a voltage detection device set and a voltage comparator; the voltage signal output end of the transformer group is connected with the control signal input end of the switch power supply group through a switch, and the voltage signal output end of the transformer group is the power supply control signal output end of the signal detection device; the voltage signal output end of the transformer set is connected with the detection signal input end of the voltage detection device set; the detection signal output end of the voltage detection device group is connected with the signal input end of the voltage comparator; the signal output end of the voltage comparator is connected with the detection signal input end of the controller; the signal output end of the voltage comparator is the detection signal output end of the signal detection device.
Further, the transformer group comprises a first transformer and a second transformer; the first transformer and the second transformer correspond to a first switching power supply and a second switching power supply in the switching power supply group.
Further, the voltage detection device group comprises a first voltage detection device and a second voltage detection device; the signal input end of the first voltage detection device is connected with the voltage signal output end of a first transformer of the transformer group; the signal input end of the second voltage detection device is connected with the voltage signal output end of the second transformer of the transformer group.
Further, the dual-power auxiliary switching device further comprises a second switch and a virtual load; the voltage signal output ends of the first transformer and the second transformer of the transformer group are connected with the power signal input end of the virtual load through a second switch; the control signal input end of the virtual load is connected with the control signal output end of the controller.
In a second aspect, the present invention provides a switching control method of a dual-power auxiliary switching device, where the method includes:
s1: supplying power to the load through a first switching power supply or a second switching power supply contained in the switching power supply group;
s2: determining parameters of the virtual load through output voltage signals of a transformer in the load power supply process, and adjusting the parameters of the virtual load through a controller;
s3: after the virtual load is regulated, controlling a second switch power supply or a first switch power supply which does not supply power to the load to supply power to the virtual load at regular time through a double-power auxiliary switching circuit;
s4: and in the process of simultaneously supplying power to the load and the virtual load, comparing output voltage signals of the first transformer and the second transformer in the process of simultaneously supplying power through the signal detection device, and controlling the dual-power auxiliary switching circuit to switch the switching power supply of the load through a comparison result.
Further, determining parameters of the virtual load through output voltage signals of the transformer in the load power supply process, and adjusting the parameters of the virtual load through the controller, wherein the method comprises the following steps:
s21: detecting voltage signals output by a transformer corresponding to a first switching power supply or a second switching power supply in the load power supply process through a signal acquisition device, and acquiring parameters of a load through a controller; wherein the parameters of the load include voltage, current, power, resistance, inductance and capacitance;
s22: the controller adjusts the virtual load by utilizing the parameters of the load, so that the parameters of the virtual load are consistent with the parameters of the load.
Further, after the adjustment of the virtual load is completed, controlling the second switching power supply or the first switching power supply which does not provide power for the load to supply power to the virtual load by controlling the second switch through the dual-power auxiliary switching circuit, including:
s31: after the virtual load adjustment is completed, setting a power supply time period and a non-power supply time period through a controller;
s32: the controller controls the dual-power auxiliary switching circuit to perform switching control on the second switch at the starting moment of the power supply time period, so that the second switch is connected with a second switching power supply which does not supply power to the load or a passage between the first switching power supply and the virtual load in the power supply time period;
S33: the controller controls the dual-power auxiliary switching circuit to switch and control the second switch at the starting time of the non-power-supply time period, so that the second switch cuts off a path between the second switch power supply or the first switch power supply which does not supply power to the load and the virtual load in the non-power-supply time period.
Further, in the process of simultaneously supplying power to the load and the virtual load, comparing output voltage signals of the first transformer and the second transformer in the process of simultaneously supplying power by using the signal detection device, and controlling the dual-power auxiliary switching circuit to switch the switching power supply of the load by using the comparison result, the switching power supply comprises:
s41: in the process of supplying power to a load and a virtual load simultaneously, detecting voltage signals output by a first transformer and a second transformer through a first voltage detection device and a second voltage detection device;
s42: inputting the voltage signals obtained by detection of the first voltage detection device and the second voltage detection device into a voltage comparator to obtain a voltage difference value between the voltage signals output by the first transformer and the second transformer;
s43: the voltage comparator inputs the voltage difference value into the controller in real time to judge the difference value, and when the voltage difference value between the voltage signals output by the first transformer and the second transformer exceeds a preset voltage difference threshold value, the controller acquires the operation parameters of the switching power supply by utilizing the power supply output signals of the first switching power supply or the second switching power supply which are acquired in real time and are used for supplying power to the load; the operation parameters of the switching power supply are obtained through the following formula:
；
Wherein,Qrepresenting the operating parameters of the switching power supply;Pthe rated output power of the switching power supply for supplying power to the load is represented;P 0 the method comprises the steps of representing the actual power output by a switching power supply for supplying power to a load when the voltage difference between voltage signals output by a first transformer and a second transformer exceeds a preset voltage difference threshold;nrepresenting the voltages output by the first and second transformersThe number of unit time which is passed before the voltage difference value between the signals exceeds the preset voltage difference threshold value moment, and the unit time is 1s;P i represent the firstiThe output power of the switching power supply corresponding to each unit time;U e a rated output voltage of a switching power supply that supplies power to a load;U 0 the output voltage of the switching power supply for supplying power to the load at the moment when the voltage difference between the voltage signals output by the first transformer and the second transformer exceeds the preset voltage difference threshold value is represented;U c representing a voltage difference between the voltage signals output by the first and second transformers;U c0 representing a preset voltage difference threshold;U ref a reference voltage representing a switching power supply that supplies power to a load;R c andR f the resistances of the frequency dividing resistor and the sampling resistor of the switching power supply for supplying power to the load are respectively represented; U max A maximum allowable voltage magnitude value representing the switching power supply output voltage that powers the load; lambda (lambda) 01 And lambda (lambda) 02 The first coefficient and the second coefficient are represented respectively, and are obtained by the following formula:
；
wherein,Lrepresenting the probability of failure of a switching power supply supplying power to a virtual load;
s44: when the operation parameters of the switch power supply exceed the preset parameter threshold, the controller controls the dual-power auxiliary switching circuit to switch and control the first switch, and a second switch power supply which does not provide power for the load or a passage between the first switch power supply and the load is connected.
The invention has the beneficial effects that: the auxiliary switching device of the double power supplies can switch to the standby power supply in time under the condition of main power supply failure or abnormality, so that stable power supply of a load is ensured, and equipment failure or data loss caused by power supply interruption is avoided; the voltage detection device in the device monitors the voltage output by the power supply in real time, and judges and switches the difference value through the comparator and the controller. Therefore, the abnormal voltage can be detected rapidly, and the standby power supply can be switched to in time when the voltage difference exceeds the threshold value, so that continuous power supply of the load is ensured; the switching control method in the device combines the calculation and judgment of the operation parameters of the switching power supply, and dynamically adjusts the switching strategy according to the operation parameters of the power supply acquired in real time. Therefore, the switching process is more intelligent, the switching time and mode can be flexibly controlled according to the conditions of voltage, power and the like, and the stability and reliability of the system are improved; by considering the output power and voltage conditions of the power supply, the switching control method can optimize the operation parameters of the switching power supply, improve the energy efficiency and reduce the energy waste. This helps to reduce energy costs and environmental impact.
Drawings
FIG. 1 is a block diagram of a dual power auxiliary switching device according to an embodiment of the present invention;
fig. 2 is a step diagram of a switching control method of a dual-power auxiliary switching device according to an embodiment of the invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
Example 1: fig. 1 is a connection diagram of a module of a dual-power auxiliary switching device according to an embodiment of the present invention, as shown in fig. 1, a dual-power auxiliary switching device includes a switching power supply group, a first switch, a signal detection device, a controller, and a dual-power auxiliary switching circuit; the power control signal output end of the signal detection device is electrically connected with the power control signal input end of the switch power supply group through a first switch; the detection signal output end of the signal detection device is electrically connected with the detection signal input end of the controller; the switching control instruction output end of the controller is electrically connected with the switching instruction signal input end of the dual-power auxiliary switching circuit; the switching control signal output end of the dual-power auxiliary switching circuit is electrically connected with the control signal input end of the first switch; and the power signal output end of the switch power supply group is electrically connected with the controller.
The working principle of the technical scheme is as follows: in the working state, the switch power supply group provides power for the signal detection device, the controller and the dual-power auxiliary switching circuit; the signal detection device monitors the power state in real time, and when detecting power abnormality, such as unstable voltage, power failure and the like, the signal detection device outputs a power control signal; the power supply control signal is connected with the power supply control signal input end of the switch power supply group through the first switch, so that the switch power supply group enters a standby state, namely, is switched to a standby power supply; meanwhile, a detection signal output end of the signal detection device is connected with a detection signal input end of the controller, and the controller sends out a switching control instruction after receiving a power supply abnormal signal; the switching control instruction is connected with the switching instruction signal input end of the dual-power auxiliary switching circuit through the switching control instruction output end, so that the dual-power auxiliary switching circuit starts to work; the dual-power auxiliary switching circuit controls the switching of the first switch according to the received switching instruction, so that the normal switching of the power supply is realized; after the switching is finished, the power signal output end of the switch power supply group is electrically connected with the controller, and the controller resumes normal operation after receiving the power normal signal.
The technical scheme has the effects that: the working state of the power supply is monitored in real time through the signal detection device, once one of the power supplies is found to be faulty or abnormal, the controller can make a switching decision in time, the continuous and stable power supply of the system is ensured, and the reliability of the system is improved. Under the abnormal condition of the power supply, such as unstable voltage, power failure and the like, the device can detect and switch to the standby power supply in real time, so that the normal operation of the equipment is ensured; the automatic switching is realized through the controller, so that the necessity of manual intervention is reduced, and the stability and usability of the system are improved; the dual-power auxiliary switching circuit can realize rapid and accurate control in the power switching process, so that the utilization rate of the power is improved; the device has a relatively simple structure, and the modular design enables expansion and maintenance to be more convenient; through the optimized management of the switch power supply group, the energy waste is reduced, and the utilization efficiency of the whole energy is improved; the signal detection device monitors the power state in real time, timely finds and processes power abnormality, and reduces the risk of equipment failure; the device is suitable for various power supply environments, and has strong adaptability and universality.
Example 2: in this embodiment, the switching power supply group includes a first switching power supply and a second switching power supply; the power supply control signal input ends of the first switching power supply and the second switching power supply are the power supply control signal input ends of the switching power supply group.
The working principle of the technical scheme is as follows: the switching power supply group comprises a first switching power supply and a second switching power supply which are respectively used as two standby power supplies; the power supply control signal input ends of the first switching power supply and the second switching power supply are the power supply control signal input ends of the switching power supply group, and the controller can control the working states of the two switching power supplies through the input ends. The power supply control signal output end of the signal detection device is connected with the power supply control signal input ends of the first switch and the second switch power supply, and the states of the two power supplies are monitored and controlled. The detection signal output end is connected with the detection signal input end of the controller, and the controller obtains the information of the current power supply working state through the detection signal. The switching control instruction output end of the controller is connected with the switching instruction signal input end of the dual-power auxiliary switching circuit, and the controller can send a switching instruction to the dual-power auxiliary switching circuit through the output end. The switching control signal output end of the dual-power auxiliary switching circuit is connected with the control signal input end of the first switch, and the dual-power auxiliary switching circuit can control the state of the first switch through the connection. The power signal output end of the switch power supply group is connected with the controller, so that the controller can acquire the working state information of each power supply.
The technical scheme has the effects that: by adopting the first switching power supply and the second switching power supply to form the switching power supply group, the redundant backup of the power supply is realized. When one of the power supplies fails, the other power supply can take over immediately, so that the normal operation of the equipment is ensured; the signal detection device monitors the power state in real time, can rapidly send out a control signal when the power is abnormal, realizes normal switching of the power, and improves the stability of the system; the controller automatically sends out a switching control instruction according to the detection signal of the signal detection device, so that the automatic switching of the power supply is realized, and the necessity of manual intervention is reduced; when the first switching power supply and the second switching power supply work normally, load balancing can be achieved, and the utilization rate of the power supplies is improved; by optimizing the management of the switching power supply, the energy waste is reduced, and the utilization efficiency of the whole energy is improved; the power state is monitored in real time, the power abnormality is found and processed in time, and the equipment fault risk is reduced.
Example 3: in this embodiment, the signal detection device includes a transformer set, a voltage detection device set, and a voltage comparator; the voltage signal output end of the transformer group is connected with the control signal input end of the switch power supply group through a switch, and the voltage signal output end of the transformer group is the power supply control signal output end of the signal detection device; the voltage signal output end of the transformer set is connected with the detection signal input end of the voltage detection device set; the detection signal output end of the voltage detection device group is connected with the signal input end of the voltage comparator; the signal output end of the voltage comparator is connected with the detection signal input end of the controller; the signal output end of the voltage comparator is the detection signal output end of the signal detection device.
The transformer group comprises a first transformer and a second transformer; the first transformer and the second transformer correspond to a first switching power supply and a second switching power supply in the switching power supply group.
The voltage detection device group comprises a first voltage detection device and a second voltage detection device; the signal input end of the first voltage detection device is connected with the voltage signal output end of a first transformer of the transformer group; the signal input end of the second voltage detection device is connected with the voltage signal output end of the second transformer of the transformer group.
The working principle of the technical scheme is as follows: the transformer group is composed of a first transformer and a second transformer. Which correspond to the first and second switching power supplies in the switching power supply group. The voltage signal output end of the transformer group is connected with the control signal input end of the switching power supply group through a switch. Meanwhile, the voltage signal output end of the transformer group is also the power supply control signal output end of the signal detection device; the voltage detection device group comprises a first voltage detection device and a second voltage detection device. The signal input end of the first voltage detection device is connected with the voltage signal output end of a first transformer of the transformer bank, and the signal input end of the second voltage detection device is connected with the voltage signal output end of a second transformer of the transformer bank; the detection signal output end of the voltage detection device group is connected with the signal input end of the voltage comparator. The voltage comparator is used for comparing the received voltage signals and judging whether the power supply state is normal or abnormal according to the set threshold value; the signal output end of the voltage comparator is connected with the detection signal input end of the controller. The controller receives the signal of the voltage comparator and performs corresponding control operation, such as switching to a standby power supply, according to the judgment result.
The technical scheme has the effects that: through the organic combination of the transformer group, the voltage detection device group and the voltage comparator, the reliable monitoring and control of the power supply state can be realized, so that the stability and the reliability of the system are ensured; the components are matched with each other, so that the power state can be monitored in real time, and the system can be ensured to be switched to the standby power supply in the shortest time when abnormal conditions are detected and the influence of faults on the normal operation of the system is reduced; the components involved in the scheme are relatively simple, easy to realize and maintain, and the complexity and maintenance cost of the system are reduced; by timely monitoring the power state and automatically switching, the stability of the system can be effectively improved, and the risk of downtime of the system caused by power failure is reduced; the scheme can be customized and adjusted according to actual requirements, is suitable for power supply systems of different scales and types, and has strong universality and flexibility.
Example 4: in this embodiment, the dual-power auxiliary switching device further includes a second switch and a virtual load; the voltage signal output ends of the first transformer and the second transformer of the transformer group are connected with the power signal input end of the virtual load through a second switch; the control signal input end of the virtual load is connected with the control signal output end of the controller.
The working principle of the technical scheme is as follows: the voltage signal output ends of the first transformer and the second transformer of the transformer group are connected to the power signal input end of the virtual load through the second switch, and the controller sends a control signal to the virtual load; when the main power supply fails or needs to be switched to the standby power supply, the controller detects the abnormal state of the power supply and triggers the switching operation; once the switching operation is triggered, the controller sends a control signal to the virtual load to simulate a certain load to ensure that the standby power supply is in a normal working state; meanwhile, the controller also controls the first switch and the second switch to connect the standby power supply to the actual load, and the power supply switching process is completed.
The technical scheme has the effects that: through the double-power auxiliary switching device, when the power supply fails, the automatic switching to the standby power supply can be realized, and the normal operation of the load is ensured; the second switch is connected with the virtual load, so that the first transformer and the second transformer can automatically adjust output voltage according to load requirements, load balancing is realized, and power supply utilization efficiency is improved; the control signal input end of the virtual load is connected with the control signal output end of the controller, so that dynamic adjustment of the virtual load can be realized according to the control signal sent by the controller, and different load demands can be met; by adopting the second switch and the virtual load, the system structure is simplified, the complexity of the equipment is reduced, and the installation, maintenance and management are convenient; the double-power auxiliary switching device can automatically adjust power supply according to load requirements, so that unnecessary energy waste is avoided, and the energy utilization efficiency is improved; the power state is monitored in real time, the power abnormality is found and processed in time, and the equipment fault risk is reduced.
Example 5: fig. 2 is a step diagram of a switching control method of a dual-power auxiliary switching device according to an embodiment of the present invention, as shown in fig. 2, where the switching control method of the dual-power auxiliary switching device is applied to the dual-power auxiliary switching device according to the foregoing embodiment, and the method includes:
s1: supplying power to the load through a first switching power supply or a second switching power supply contained in the switching power supply group;
s2: determining parameters of the virtual load through output voltage signals of a transformer in the load power supply process, and adjusting the parameters of the virtual load through a controller;
s3: after the virtual load is regulated, controlling a second switch power supply or a first switch power supply which does not supply power to the load to supply power to the virtual load at regular time through a double-power auxiliary switching circuit;
s4: and in the process of simultaneously supplying power to the load and the virtual load, comparing output voltage signals of the first transformer and the second transformer in the process of simultaneously supplying power through the signal detection device, and controlling the dual-power auxiliary switching circuit to switch the switching power supply of the load through a comparison result.
The working principle of the technical scheme is as follows: supplying the load by the first switching power supply or the second switching power supply, which is an initial power supply state; when the load is powered, the output voltage signal of the transformer may be used to determine parameters of the virtual load. The controller can carry out parameter adjustment on the virtual load according to the parameters so as to ensure that the virtual load can accurately simulate the characteristics of the actual load; after the adjustment of the virtual load is completed, the controller controls the second switch through the dual-power auxiliary switching circuit, so that the second switch power supply or the first switch power supply which does not supply power to the load supplies power to the virtual load at regular time. Thus, the virtual load can be ensured to be in a correct working state; and comparing output voltage signals of the first transformer and the second transformer in the process of simultaneously supplying power through a signal detection device. And controlling the dual-power auxiliary switching circuit to switch the switching power supply of the load according to the comparison result, thereby realizing the switching of the actual load.
The technical scheme has the effects that: by the switching control method, double power supplies for loads can be realized, and reliability and stability of a power supply system are improved. Once one of the power supplies fails, the system can be automatically switched to the other power supply, so that continuous power supply of the load is ensured; the parameters of the virtual load are ensured to be consistent with the parameters of the actual load by monitoring the output voltage signal of the transformer and carrying out parameter adjustment on the virtual load by the controller, so that the simulation precision of the system on the actual load is improved; after the adjustment of the virtual load is not completed, the power supply which does not provide power for the load is controlled to supply power for the virtual load at regular time by controlling the second switch, so that the virtual load can be ensured to obtain continuous power supply before the parameter adjustment is completed, and the stable operation of the system is ensured; the output voltage signals of the two transformers in the simultaneous power supply process are compared through the signal detection device, and the double-power auxiliary switching circuit is controlled to switch the switching power supply of the load through the comparison result, so that the real-time monitoring and control of the power supply process can be realized, and the stability and reliability of power supply are ensured. On the other hand, according to the technical scheme, the virtual load with the same real parameters as the load and the voltage comparison result between the corresponding timing detection of the switching power supply operation and the real load are set to serve as the triggering condition of the load power supply operation assessment, so that the problem that the power supply controller is subjected to larger rechecking and energy consumption in the traditional real-time load power supply operation assessment can be avoided, meanwhile, the data redundancy corresponding to the minimum system of the controller can be reduced to the greatest extent, and further the service life and the operation stability of the power supply are effectively improved.
Example 6: in this embodiment, determining parameters of a virtual load by using an output voltage signal of a transformer in a load power supply process, and performing parameter adjustment on the virtual load by using a controller includes:
s21: detecting voltage signals output by a transformer corresponding to a first switching power supply or a second switching power supply in the load power supply process through a signal acquisition device, and acquiring parameters of a load through a controller; wherein the parameters of the load include voltage, current, power, resistance, inductance and capacitance;
s22: the controller adjusts the virtual load by utilizing the parameters of the load, so that the parameters of the virtual load are consistent with the parameters of the load.
The working principle of the technical scheme is as follows: the signal acquisition device detects voltage signals output by a transformer corresponding to the first switching power supply or the second switching power supply in the load power supply process, and transmits the detected signals to the controller. The controller acquires the parameter information of the load through detecting parameters such as voltage, current, power, resistance, inductance, capacitance and the like; the controller adjusts the virtual load by using the obtained load parameter information, so that the parameters of the virtual load are consistent with the parameters of the actual load. Therefore, the working state of the actual load can be simulated, and the virtual load can accurately reflect the requirement of the actual load.
The technical scheme has the effects that: through the detection of the voltage signal output by the transformer, the parameters of the actual load, including voltage, current, power, resistance, inductance, capacitance and the like, can be accurately obtained. Therefore, the parameters of the virtual load are ensured to be consistent with the parameters of the actual load, and the accuracy of the parameters is improved; by adjusting the parameters of the virtual load to be consistent with the parameters of the actual load, the stability of the system in the power supply process can be maintained. The adjusted virtual load can better simulate the working state of an actual load, ensure stable power supply in the power supply process and avoid the influence of voltage fluctuation on equipment; the controller is used for carrying out parameter adjustment on the virtual load, so that the accurate control on the parameters in the load power supply process can be realized. Therefore, the virtual load can be adjusted according to actual requirements so as to meet the load requirements under different working states, and the accuracy and adaptability of power supply are improved; by accurately controlling the parameters of the virtual load, the waste of energy can be avoided, and the energy efficiency of power supply can be improved. The adjusted virtual load can be more accurately matched with the requirement of an actual load, excessive power supply or insufficient power supply in the power supply process is avoided, and therefore the energy utilization efficiency is improved.
Example 7: in this embodiment, after the adjustment of the virtual load is completed, the controlling to make the second switching power supply or the first switching power supply that does not provide power to the load provide power to the virtual load by controlling the second switch through the dual-power auxiliary switching circuit includes:
s31: after the virtual load adjustment is completed, setting a power supply time period and a non-power supply time period through a controller;
s32: the controller controls the dual-power auxiliary switching circuit to perform switching control on the second switch at the starting moment of the power supply time period, so that the second switch is connected with a second switching power supply which does not supply power to the load or a passage between the first switching power supply and the virtual load in the power supply time period;
s33: the controller controls the dual-power auxiliary switching circuit to switch and control the second switch at the starting time of the non-power-supply time period, so that the second switch cuts off a path between the second switch power supply or the first switch power supply which does not supply power to the load and the virtual load in the non-power-supply time period.
The working principle of the technical scheme is as follows: the controller sets a power supply period and a non-power supply period. The power supply period refers to a period in which the virtual load needs to receive power supply, and the non-power supply period is a period in which the virtual load does not need to receive power supply. By the arrangement, the power supply time of the virtual load can be accurately controlled so as to meet the system requirement; and at the starting moment of the power supply time period, the controller starts the dual-power auxiliary switching circuit to perform switching control on the second switch, so that the second switch is connected with a second switching power supply which does not supply power to the load or a path between the first switching power supply and the virtual load in the power supply time period. In this way, the virtual load can receive power supply from the second switching power supply or the first switching power supply, and normal operation of the virtual load is ensured; and at the starting time of the non-power supply time period, the controller controls the dual-power auxiliary switching circuit to perform switching control on the second switch, so that the second switch cuts off a path between the second switching power supply or the first switching power supply which does not supply power to the load and the virtual load in the non-power supply time period.
The technical scheme has the effects that: by setting the power supply period and the non-power supply period, accurate power supply control can be realized according to the demands of the virtual load. Thus, unnecessary energy waste can be avoided, and the energy utilization efficiency is improved; in the non-power supply time period, the second switching power supply or the first switching power supply which does not provide power for the load is disconnected from the virtual load, so that energy can be effectively saved. This is particularly important for systems that operate for long periods of time, which can reduce energy costs; the second switch is switched and controlled by the dual-power auxiliary switching circuit, so that stable power supply of the virtual load in the power supply time period can be ensured. The influence of power interruption on the system operation can be reduced, and the reliability and stability of the system are improved; in the non-power supply time period, the power supply path with the virtual load is disconnected, so that potential power supply problems can be effectively prevented from affecting the safety of the virtual load. This helps to protect the normal operation of the virtual load and reduces the occurrence of faults.
Example 8: in this embodiment, in a process of simultaneously supplying power to a load and a virtual load, output voltage signals of a first transformer and a second transformer in the process of simultaneously supplying power are compared by a signal detection device, and a dual-power auxiliary switching circuit is controlled to switch a switching power supply of the load by a comparison result, including:
S41: in the process of supplying power to a load and a virtual load simultaneously, detecting voltage signals output by a first transformer and a second transformer through a first voltage detection device and a second voltage detection device;
s42: inputting the voltage signals obtained by detection of the first voltage detection device and the second voltage detection device into a voltage comparator to obtain a voltage difference value between the voltage signals output by the first transformer and the second transformer;
s43: the voltage comparator inputs the voltage difference value into the controller in real time to judge the difference value, and when the voltage difference value between the voltage signals output by the first transformer and the second transformer exceeds a preset voltage difference threshold value, the controller acquires the operation parameters of the switching power supply by utilizing the power supply output signals of the first switching power supply or the second switching power supply which are acquired in real time and are used for supplying power to the load; wherein the voltage difference threshold is obtained by the following formula:
；
wherein,U c0 representing a voltage difference threshold, and when the voltage difference threshold is a negative value, carrying out power supply abnormality alarm; deltaEAn absolute value representing a difference value of an actual output voltage between the first transformer and the second transformer in a steady power supply condition; U smax01 An actual maximum voltage amplitude value representing the switching power supply output voltage that powers the virtual load;U smax02 an actual maximum voltage amplitude value representing the switching power supply output voltage that powers the load;U max a maximum allowable voltage magnitude value representing the switching power supply output voltage that powers the load;xrepresenting the compensation adjustment coefficient;P sd a floating average value of output power of a switching power supply for supplying power to a virtual load;P d a floating average value of output power of a switching power supply for supplying power to a load;
by the mode, the voltage difference threshold value can be set according to the actual running condition of the switching power supply for supplying power to the virtual load, the setting rationality of the voltage difference threshold value can be effectively improved, and the voltage difference threshold value and the transformer of the switching power supply generate self-adaptive adjustment of parameter change caused by aging along with the increase of the service time. Meanwhile, the voltage difference threshold obtained through the mode can effectively improve the sensitivity of differential pressure judgment, prevent the situation that the sensitivity is lower due to overlarge threshold setting, and further judge that the operation is abnormal in time, and simultaneously prevent the problem that the sensitivity is too high due to overlarge threshold setting, so that the switching power supply is averagely switched.
The operation parameters of the switching power supply are obtained through the following formula:
；
wherein,Qrepresenting the operating parameters of the switching power supply;Pthe rated output power of the switching power supply for supplying power to the load is represented;P 0 the method comprises the steps of representing the actual power output by a switching power supply for supplying power to a load when the voltage difference between voltage signals output by a first transformer and a second transformer exceeds a preset voltage difference threshold;nthe number of unit time which is passed before the voltage difference value between the voltage signals output by the first transformer and the second transformer exceeds the preset voltage difference threshold value moment is represented, and the unit time is 1s;P i represent the firstiThe output power of the switching power supply corresponding to each unit time;U e a rated output voltage of a switching power supply that supplies power to a load;U 0 the output voltage of the switching power supply for supplying power to the load at the moment when the voltage difference between the voltage signals output by the first transformer and the second transformer exceeds the preset voltage difference threshold value is represented;U c representing a voltage difference between the voltage signals output by the first and second transformers;U c0 representing a preset voltage difference threshold;U ref a reference voltage representing a switching power supply that supplies power to a load; R c AndR f the resistances of the frequency dividing resistor and the sampling resistor of the switching power supply for supplying power to the load are respectively represented;U max a maximum allowable voltage magnitude value representing the switching power supply output voltage that powers the load; lambda (lambda) 01 And lambda (lambda) 02 The first coefficient and the second coefficient are represented respectively, and are obtained by the following formula:
；
wherein,Lrepresenting the probability of failure of a switching power supply supplying power to a virtual load;
s44: when the operation parameters of the switch power supply exceed the preset parameter threshold, the controller controls the dual-power auxiliary switching circuit to switch and control the first switch, and a second switch power supply which does not provide power for the load or a passage between the first switch power supply and the load is connected.
The working principle of the technical scheme is as follows: in the process of supplying power to a load and a virtual load simultaneously, detecting voltage signals output by a first transformer and a second transformer through a first voltage detection device and a second voltage detection device; inputting the voltage signals obtained by detection of the first voltage detection device and the second voltage detection device into a voltage comparator to obtain a voltage difference value between the voltage signals output by the first transformer and the second transformer; the voltage comparator inputs the voltage difference value into the controller in real time to judge the difference value, and when the voltage difference value between the voltage signals output by the first transformer and the second transformer exceeds a preset voltage difference threshold value, the controller acquires the operation parameters of the switching power supply by utilizing the power supply output signals of the first switching power supply or the second switching power supply which are acquired in real time and are used for supplying power to the load; when the operation parameters of the switch power supply exceed the preset parameter threshold, the controller controls the dual-power auxiliary switching circuit to switch and control the first switch, and a second switch power supply which does not provide power for the load or a passage between the first switch power supply and the load is connected.
The technical scheme has the effects that: by using the first voltage detecting means and the second voltage detecting means, the voltage signals output from the first transformer and the second transformer can be detected in real time and compared with each other by the input voltage comparator. Thus, the difference value between the two voltage signals can be accurately obtained to determine whether the power supply switching is needed or not; the voltage difference value is input into the controller in real time to be judged, and when the voltage difference value exceeds a preset voltage difference threshold value, the controller can quickly respond. The controller can acquire the operation parameters of the switching power supply, and if the operation parameters are found to exceed the preset parameter threshold, the controller indicates that the switching power supply is abnormal. Therefore, the power supply problem can be found in time and measures can be taken to ensure the stable power supply of the load; when the operation parameters of the switching power supply are abnormal, the controller can perform switching control on the dual-power auxiliary switching circuit. By switching on the path between the main switching power supply or the standby switching power supply that does not supply power to the load and the load, smooth switching of the power supply to the load can be achieved. This avoids power supplyThe voltage fluctuation at the switching moment affects the load, so that the stable operation of the load is ensured; by implementing the redundant backup of the dual-power auxiliary switching circuit and the standby power, the power supply can be rapidly switched to the standby power supply when one power supply fails or is abnormal. Therefore, the reliability of the system can be improved, the risk of shutdown is reduced, and the continuous power supply of the load is ensured. The above-described switching power supply operating parameter formula evaluates the actual power of the switching power supply supplied by the load by calculating the operating parameters of the switching power supply. By adjusting the coefficients in the formula, the accuracy and adaptability of the formula can be improved. Therefore, the running condition of the switching power supply can be monitored in real time, stable power supply of a load is ensured, and the reliability and stability of the system are improved. Meanwhile, the operation parameters of the switching power supply are calculated in real time QThe actual power condition of the switching power supply can be known in time. Therefore, whether power supply switching is needed or not can be rapidly judged, so that continuous power supply of a load is ensured; the equation takes into account a number of factors, including the output power of the switching power supplyPTime interval when the voltage difference exceeds a thresholdnOutput per unit timeP i Etc. By comprehensively calculating the factors, the actual power value of the switching power supply is obtained more accurately than simple sampling, and lambda 01 and lambda 02 in the formula are adjustable coefficients. And calculating a formula through the first coefficient and the second coefficient, and adjusting the coefficients in the formula to adapt to different application scenes and system characteristics. Therefore, the decision can be optimized, the reliability and the efficiency of load power supply are improved, and the risk of system faults is reduced. Meanwhile, by adjusting the values of the first coefficient and the second coefficient, the fault probability can be quantitatively evaluated according to actual requirements and system characteristics. Therefore, the method can flexibly adapt to different application scenes and operation conditions, and improves the accuracy of fault prediction and management; the probability of failure in the equation indicates the probability of failure of the switching power supply. Through the evaluation of the fault probability, corresponding measures can be timely taken, potential problems are prevented, and the influence of faults on load power supply is reduced. This helps to reduce the risk of system failure, ensuring reliable operation of the system; through the calculated fault probability, the risk and the reliability of different switching power supply schemes can be evaluated. Root of Chinese character According to the evaluation results, an optimized load power supply decision can be made, and the most suitable switching power supply configuration and backup scheme are selected. Therefore, the efficiency and the reliability of the system can be improved, and the operation and maintenance cost and risk are reduced.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The switching control method of the dual-power auxiliary switching device is characterized in that the dual-power auxiliary switching device comprises a load, a switching power supply group, a first switch, a signal detection device, a controller and a dual-power auxiliary switching circuit; the power control signal output end of the signal detection device is electrically connected with the power control signal input end of the switch power supply group through a first switch; the detection signal output end of the signal detection device is electrically connected with the detection signal input end of the controller; the switching control instruction output end of the controller is electrically connected with the switching instruction signal input end of the dual-power auxiliary switching circuit; the switching control signal output end of the dual-power auxiliary switching circuit is electrically connected with the control signal input end of the first switch; the power signal output end of the switch power supply group is respectively and electrically connected with the controller and the load;
The switching control method of the dual-power auxiliary switching device comprises the following steps:
supplying power to the load through a first switching power supply or a second switching power supply contained in the switching power supply group;
determining parameters of the virtual load through output voltage signals of a transformer in the load power supply process, and adjusting the parameters of the virtual load through a controller;
after the virtual load is regulated, controlling a second switch power supply or a first switch power supply which does not supply power to the load to supply power to the virtual load at regular time through a double-power auxiliary switching circuit;
the method comprises the steps that output voltage signals of a first transformer and a second transformer in the simultaneous power supply process are compared through a signal detection device in the simultaneous power supply process of a load and a virtual load, and a double-power auxiliary switching circuit is controlled to switch a switching power supply of the load through a comparison result;
the switching power supply comprises a first transformer, a second transformer, a signal detection device, a double-power auxiliary switching circuit, a switching power supply, a power supply control device and a control device, wherein the output voltage signals of the first transformer and the second transformer in the simultaneous power supply process are compared through the signal detection device in the simultaneous power supply process for a load and a virtual load, and the double-power auxiliary switching circuit is controlled to switch the power supply of the load through a comparison result, and the switching power supply comprises:
In the process of supplying power to a load and a virtual load simultaneously, detecting voltage signals output by a first transformer and a second transformer through a first voltage detection device and a second voltage detection device;
inputting the voltage signals obtained by detection of the first voltage detection device and the second voltage detection device into a voltage comparator to obtain a voltage difference value between the voltage signals output by the first transformer and the second transformer;
the voltage comparator inputs the voltage difference value into the controller in real time to judge the difference value, and when the voltage difference value between the voltage signals output by the first transformer and the second transformer exceeds a preset voltage difference threshold value, the controller acquires the operation parameters of the switching power supply by utilizing the power supply output signals of the first switching power supply or the second switching power supply which are acquired in real time and are used for supplying power to the load; the operation parameters of the switching power supply are obtained through the following formula:
；
wherein,Qrepresenting the operating parameters of the switching power supply;Pthe rated output power of the switching power supply for supplying power to the load is represented;P 0 representing the actual work output by the switching power supply for supplying power to the load when the voltage difference between the voltage signals output by the first transformer and the second transformer exceeds the preset voltage difference threshold value A rate;nthe number of unit time which is passed before the voltage difference value between the voltage signals output by the first transformer and the second transformer exceeds the preset voltage difference threshold value moment is represented, and the unit time is 1s;P i represent the firstiThe output power of the switching power supply corresponding to each unit time;U e a rated output voltage of a switching power supply that supplies power to a load;U 0 the output voltage of the switching power supply for supplying power to the load at the moment when the voltage difference between the voltage signals output by the first transformer and the second transformer exceeds the preset voltage difference threshold value is represented;U c representing a voltage difference between the voltage signals output by the first and second transformers;U c0 representing a preset voltage difference threshold;U ref a reference voltage representing a switching power supply that supplies power to a load;R c andR f the resistances of the frequency dividing resistor and the sampling resistor of the switching power supply for supplying power to the load are respectively represented;U max a maximum allowable voltage magnitude value representing the switching power supply output voltage that powers the load; lambda (lambda) 01 And lambda (lambda) 02 The first coefficient and the second coefficient are represented respectively, and are obtained by the following formula:
；
wherein,Lrepresenting the probability of failure of a switching power supply supplying power to a virtual load;
When the operation parameters of the switch power supply exceed the preset parameter threshold, the controller controls the dual-power auxiliary switching circuit to switch and control the first switch, and a second switch power supply which does not provide power for the load or a passage between the first switch power supply and the load is connected.
2. The switching control method of the dual power auxiliary switching device according to claim 1, wherein the switching power supply group includes a first switching power supply and a second switching power supply; the power supply control signal input ends of the first switching power supply and the second switching power supply are the power supply control signal input ends of the switching power supply group.
3. The switching control method of the dual power auxiliary switching device according to claim 2, wherein the signal detection device includes a transformer group, a voltage detection device group, and a voltage comparator; the voltage signal output end of the transformer group is connected with the control signal input end of the switch power supply group through a switch, and the voltage signal output end of the transformer group is the power supply control signal output end of the signal detection device; the voltage signal output end of the transformer set is connected with the detection signal input end of the voltage detection device set; the detection signal output end of the voltage detection device group is connected with the signal input end of the voltage comparator; the signal output end of the voltage comparator is connected with the detection signal input end of the controller; the signal output end of the voltage comparator is the detection signal output end of the signal detection device.
4. A switching control method of a dual power auxiliary switching device according to claim 3, wherein the transformer group includes a first transformer and a second transformer; the first transformer and the second transformer correspond to a first switching power supply and a second switching power supply in the switching power supply group.
5. The switching control method of the dual power auxiliary switching device according to claim 4, wherein the voltage detection device group includes a first voltage detection device and a second voltage detection device; the signal input end of the first voltage detection device is connected with the voltage signal output end of a first transformer of the transformer group; the signal input end of the second voltage detection device is connected with the voltage signal output end of the second transformer of the transformer group.
6. The switching control method of the dual power auxiliary switching device according to claim 5, wherein the dual power auxiliary switching device further comprises a second switch and a dummy load; the voltage signal output ends of the first transformer and the second transformer of the transformer group are connected with the power signal input end of the virtual load through a second switch; the control signal input end of the virtual load is connected with the control signal output end of the controller.
7. The switching control method of a dual power auxiliary switching device according to claim 1, wherein determining parameters of the virtual load by an output voltage signal of a transformer during power supply of the load, and performing parameter adjustment of the virtual load by a controller, comprises:
detecting voltage signals output by a transformer corresponding to a first switching power supply or a second switching power supply in the load power supply process through a signal acquisition device, and acquiring parameters of a load through a controller; wherein the parameters of the load include voltage, current, power, resistance, inductance and capacitance;
the controller adjusts the virtual load by utilizing the parameters of the load, so that the parameters of the virtual load are consistent with the parameters of the load.
8. The switching control method of the dual power auxiliary switching device according to claim 1, wherein controlling to supply power to the virtual load by controlling the second switching power supply or the first switching power supply which does not supply power to the load to be timed by the dual power auxiliary switching circuit by controlling the second switch after the adjustment of the virtual load is completed, comprises:
after the virtual load adjustment is completed, setting a power supply time period and a non-power supply time period through a controller;
The controller controls the dual-power auxiliary switching circuit to perform switching control on the second switch at the starting moment of the power supply time period, so that the second switch is connected with a second switching power supply which does not supply power to the load or a passage between the first switching power supply and the virtual load in the power supply time period;
the controller controls the dual-power auxiliary switching circuit to switch and control the second switch at the starting time of the non-power-supply time period, so that the second switch cuts off a path between the second switch power supply or the first switch power supply which does not supply power to the load and the virtual load in the non-power-supply time period.
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| CN115473328A (en) * | 2022-11-02 | 2022-12-13 | 东方博沃（北京）科技有限公司 | Dual power supply switching system and method, electronic equipment and storage medium |
| CN218678533U (en) * | 2022-06-22 | 2023-03-21 | 成都芯海创芯科技有限公司 | Power automatic switching circuit, power supply system, chip and electronic equipment |
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| WO2014073787A1 (en) * | 2012-11-08 | 2014-05-15 | 주식회사 오키 | Emergency bypass changeover circuit of uninterruptible power supply |
| CN218678533U (en) * | 2022-06-22 | 2023-03-21 | 成都芯海创芯科技有限公司 | Power automatic switching circuit, power supply system, chip and electronic equipment |
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