TWI685179B - power supply system - Google Patents

Abstract

The present invention discloses a power supply system. The power supply system comprises a power supply integration, an auxiliary power circuit and a control unit. The power supply integration converts an input power source into a first DC power when the input power source is normal. At least one power storage unit of the auxiliary power circuit provides a second DC power. At least one first power converter of the auxiliary power circuit is electronically connected between the at least one power storage unit and a load. The at least one first power converter converts the second DC power into an individual auxiliary power. The auxiliary power circuit provides an overall auxiliary power through the at least one individual auxiliary power. When the input power source is normal and an instantaneous power demanded for the load is bigger than a normal rated upper value of an output power of the power supply integration, the control unit drives the auxiliary power circuit to output the overall auxiliary power. The overall auxiliary power is used to compensate the difference between the instantaneous power demanded and the normal rated upper value.

Description

power supply system

This case relates to a power supply system, especially a power supply system that uses an auxiliary power circuit to compensate the instantaneous power required by the load.

In response to the increased demand for large data centers, in order to avoid the possibility of serious data damage in large data centers, a stable and continuous power supply system that can supply power to large data centers is necessary.

Uninterruptible power systems are different from emergency power systems or backup generators. Usually, they are mainly powered by power supplies, and combined with energy stored in energy storage devices to provide instantaneous protection when the input power source is interrupted. When the AC/DC power supply is normal (such as the stable output of the mains), the power supply provides stable power to the load (such as the data center), and when the AC/DC power fails (such as the mains power failure), it needs to be equipped with another energy storage device , To provide the energy required by the load.

In the uninterruptible power system composed of the combination of the traditional power supply and the backup device, the maximum energy output of the power supply and the backup device has been limited, so when the system is loaded, the power supply is required to provide an instantaneous power that is greater than the power supply The power that the device can usually provide will cause the power supply to shut down due to overload, and then the backup device begins to supply overload current, resulting in shortened battery life, and because the backup device has no converter current sharing design, the backup device is accelerated Imbalance and aging factors. In order to solve this problem, the traditional design must increase the output power of the power supply and the cost of more backup device configurations to improve the problem of insufficient energy.

Therefore, it is necessary to provide an improved power supply system to solve the problems faced by the aforementioned prior art.

The purpose of this case is to provide a power supply system that uses an auxiliary power circuit to compensate for the instantaneous power required by the load, thereby avoiding the integrated overload of the power supply without increasing the production cost, thereby improving the battery power in the auxiliary power circuit life.

To achieve the above purpose, one of the broader implementation aspects of this case is to provide a power supply system, including power supply integration, a first auxiliary power circuit, and a control unit. The power supply is integrated and electrically connected between the input power and the load, and converts the input power to the first DC power when the input power is normal. The first auxiliary power circuit is electrically connected between the power supply integration and the load, and includes at least one first energy storage unit and at least one first power converter. At least one first energy storage unit provides second DC electrical energy. At least one first power converter is electrically connected between the at least one first energy storage unit and the load, and converts the second DC power to the first individual auxiliary power, so that the first auxiliary power circuit can pass at least one first individual auxiliary The electrical energy provides the first total auxiliary electrical energy. When the input power is normal and the first instantaneous power required by the load is greater than the first rated upper limit of the output power of the integrated output of the power supply, the control unit drives the first auxiliary power circuit to output the first total auxiliary power to compensate the first A difference between the instantaneous power and the first rated upper limit value.

To achieve the above purpose, another broader implementation of the present case is to provide a power supply system including: power supply integration, a first auxiliary power circuit, a second auxiliary power circuit, and a control unit. The power supply is integrated and electrically connected between the input power and the load, and converts the input power to the first DC power when the input power is normal. The first auxiliary power circuit is electrically connected between the integrated power supply and the load to provide the first total auxiliary power. The second auxiliary power circuit is electrically connected between the integrated power supply and the load to provide the second total auxiliary power. The control unit selectively drives at least the first auxiliary power circuit and the second auxiliary power circuit when the input power is normal and the first instantaneous power required by the load is greater than the first rated upper limit value of the output power of the integrated output of the power supply One corresponds to outputting at least one of the first total auxiliary electrical energy and the second total auxiliary electrical energy to compensate for the difference between the first instantaneous power and the first rated upper limit value.

Some typical embodiments embodying the characteristics and advantages of this case will be described in detail in the description in the following paragraphs. It should be understood that this case can have various changes in different forms, and it does not deviate from the scope of this case, and the descriptions and illustrations therein are essentially used for explanation, rather than being structured to limit this case.

Please refer to FIG. 1, which is a schematic diagram of the circuit structure of the power supply system of the first preferred embodiment of the present case. As shown in the figure, the power supply system 2 in this case is electrically connected between the input power supply P and the load L, where the input power supply P is, for example, commercial power to provide AC power, but not limited to this. In some embodiments, the input power P may be selected from any one or a combination of any two or more of solar panels, fuel cells, flywheels, generators, and renewable energy sources to provide DC power. The power supply system 2 includes a power supply integrated 21, an auxiliary power circuit 22 and a control unit 23. The power supply integrated 21 is electrically connected to the input power P, and is electrically connected to the load L via the DC bus D, for receiving the input power P when the input power P is normal, and converting the input power P to output the first DC power To load L to drive load L to operate.

The auxiliary power circuit 22 is electrically connected to the power supply integration 21 and the load L via the DC bus D. It can provide total auxiliary power to the load L during operation, and the auxiliary power circuit 22 includes at least one energy storage unit 221 and at least In this embodiment, a power converter 222 is a plurality, but it is not limited thereto. Each energy storage unit 221 is used to provide a second DC power. Each power converter 222 is electrically connected between the corresponding energy storage unit 221 and the load L, and is used to receive and convert the second DC power provided by the corresponding energy storage unit 221 into an auxiliary power during operation. The auxiliary power circuit 22 provides the total auxiliary power to the load L through the individual auxiliary power output by the power converter 222. In some embodiments, each energy storage unit 221 has a rated power. The energy storage unit 221 may be a battery or a super capacitor, but not limited thereto. In some embodiments, the energy storage unit 221 may be a plurality of sets of serial/parallel circuit structures (such as but not limited to, any energy storage unit 221 constitutes a matrix structure).

The control unit 23 is electrically connected to the power supply integration 21 and the load L via the DC bus D, and is electrically connected to the auxiliary power circuit 22. In some embodiments, the number of energy storage units 221 and power converters 222 included in the auxiliary power circuit 22 is a plurality of control units 23 for driving a plurality of power converters 222 to operate when the input power P is abnormal, and output corresponding The plurality of individual auxiliary powers enables the auxiliary power circuit 22 to use the individual auxiliary powers output by the plurality of power converters 222 to generate total auxiliary power to the load L to provide a backup effect.

In addition, the control unit 23 is further used to determine whether the instantaneous power required by the load L is greater than the rated upper limit of the output power output by the power supply integrated 21 when the power supply integrated 21 is operated (that is, the input power P is normal), According to the judgment result, it is judged whether to drive the auxiliary power circuit 22 or not. When the instantaneous power required by the load L is greater than the rated upper limit of the output power output from the power supply integrated 21, the control unit 23 drives the auxiliary power circuit 22 to operate, and at the same time, the control unit 23 further The size of the difference between the rated upper limit values is judged to calculate how many energy storage units 221 the difference must be compensated for, whereby the control unit 23 drives the corresponding number of power converters 222 to operate, so that The operating power converters 222 respectively convert the corresponding energy storage units 221 into individual auxiliary power, whereby the auxiliary power supply circuit 22 can use the total auxiliary power generated by the individual auxiliary power output by the operating power converters 222 to generate The difference between the instantaneous power required to compensate load L and the rated upper limit.

In some embodiments, the power supply system further includes a detection circuit 231 for detecting the output power output by the power supply integrated 21 and the energy parameters of the load L, such as the voltage, current, or power required by the load L, To obtain the instantaneous power required by the load L, and transmit the detected data to the control unit 23 as a basis for control or judgment.

Further, when the input power P is normal, for example, the mains grid provides power stably, the power supply integrated 21 operates to use the power supply integrated 21 to output the first DC power to supply power to the load L. When the control unit 23 determines from the detection result of the detection circuit 231 that the instantaneous power required by the load L is greater than the rated upper limit value of the output power that the power supply integrated 21 can output, the control unit 23 drives the auxiliary power circuit 22 Output total auxiliary energy to use the total auxiliary energy to compensate the difference between the instantaneous power required by the load L and the rated upper limit value. In some embodiments, the control unit 23 drives the corresponding number of power converters 222 to operate according to the difference between the instantaneous power required by the load L and the rated upper limit value, thereby utilizing the corresponding number of power converters 222 The individual auxiliary power output during operation generates the total auxiliary power output by the auxiliary power circuit 22.

On the other hand, when the input power P is normal and the power supply integrated 21 is operating, if the control unit 23 determines that the instantaneous power required by the load L is less than or equal to the rated upper limit value of the output power output from the power supply integrated 21, At this time, the power supply integrated 21 can supply the power required by the load L, so the control unit 23 does not need to further drive the auxiliary power circuit 22 to output the total auxiliary power. In addition, when the energy stored in the energy storage unit 221 of the auxiliary power circuit 22 is not saturated, the control unit 23 can control the power converter 222 to convert the first DC power provided by the power supply integrated 21 into the second DC power to the energy storage unit 221 is charged until the energy stored in the energy storage unit 221 is saturated.

When the input power P is abnormal, for example, when there is a power outage, voltage drop, surge, continuous undervoltage/overvoltage, line noise, etc. in the mains power grid, the power supply integration 21 stops operating, and at the same time, the control unit 23 drives at least one energy conversion The generator 222 operates to output the total auxiliary power to the load L until the input power P returns to normal, and then restart the power supply integration 21 to selectively drive the auxiliary power circuit 22 according to the power required by the load L.

As can be seen from the above, the auxiliary power circuit 22 of the power supply system 2 of the present case can enable the power converter 222 to operate when the instantaneous power required by the load L is greater than the rated upper limit value of the output power output from the power supply integrated 21 The total auxiliary electric energy output by the auxiliary power supply circuit 22 can compensate the difference between the instantaneous power required by the load L and the rated upper limit value. In this way, without increasing the power that the power supply integrated 21 can output or increasing the number of energy storage units 221 in the auxiliary power supply circuit 22, the power supply integrated 21 will not overload and shut down to cause auxiliary power The energy storage unit 221 in the circuit 22 must supply overload electric energy to the load L, so the service life of the energy storage unit 221 can be extended, and the production cost of the power supply system 2 in this case does not need to increase.

In some embodiments, the power converter 222 is a bidirectional converter. In other words, the auxiliary power circuit 22 can convert the first DC power output by the power supply integrated 21 into the second DC power by the power converter 222 and store it in the energy storage unit 221, and the power converter 222 can store the The second DC power in the energy storage unit 221 is converted into individual auxiliary power to be supplied to the load L.

In some embodiments, the power supply integration 21 may include at least one power supply 211. In this embodiment, there are a plurality of power supplies 211, but it is not limited thereto. A plurality of power supplies 211 are connected in parallel, and each power supply 211 includes a current sharing circuit 214, a switch 215, and a power converter 216. The power converter 216 is used to convert the input power P into first DC power. In this embodiment, the power converter 216 includes an AC/DC converter 212 and a DC/DC converter 213. The AC/DC converter 212 is electrically connected to the input power P, and is used to receive and convert AC power into DC transient power when the input power P provides AC power. The DC/DC converter 213 is electrically connected to the AC/DC converter 212 for receiving and converting DC transient electrical energy to output first DC electrical energy. In some embodiments, the power converter 216 may not include the DC/DC converter 213, and only directly converts the received AC power into the first DC power through the AC/DC converter 212. In some embodiments, if the input power P provides DC power, the power supply 211 may not include the AC/DC converter 212, and only directly converts the received DC power into the first DC power through the DC/DC converter 213.

The current sharing circuit 214 is electrically connected to the power converter 216 to adjust the current value output by the corresponding power converter 216 to be equal to the current value output by other power converters 216, thereby the plurality of power supplies 211 The current sharing circuit 214 is used to achieve current sharing. Each switch 215 is electrically connected between the corresponding current sharing circuit 214 and the load L, and is used to turn off when the power supply 211 stops operating, and to turn on when the power supply 211 operates, so that each power supply 211 The output first DC power can be transmitted to the load L via the corresponding switch 215.

Please continue to refer to FIG. 1. In other embodiments, the auxiliary power circuit 22 may further include at least one switch 223, and each switch 223 is electrically connected between the corresponding power converter 222 and the load L, and is controlled by the control unit 23 Control to switch on or off. When the power converter 222 operates to charge the energy storage unit 221 or output individual auxiliary power through the energy storage unit 221, the control unit 23 controls the corresponding switch 223 to conduct.

In some embodiments, the auxiliary power circuit 22 further includes at least one current sharing circuit 224, and each current sharing circuit 224 is electrically connected between the corresponding power converter 222 and the corresponding switch 223 to adjust the corresponding power conversion The current value of the individual auxiliary power output by the converter 222 is equal to the current value of the individual auxiliary power output by the other power converters 222, and the current is equalized, whereby the individual auxiliary power output by the power converter 222 of any operation The current value of is equal to the current value of the individual auxiliary power output by the other power converters 222, so as to achieve the effect of current sharing.

In some embodiments, when the load L has an instantaneous high power demand (ie, the power supply integrated 21 cannot meet the power required by the load L), the output current provided by each current sharing unit 214 and each current sharing The total output current provided by the unit 224 is shared. That is, the current value output by the current sharing unit 214 may be substantially equal to the current value output by the current sharing unit 224, so that the two can share the output current drawn by the load L together. In some embodiments, the current sharing unit 224 may also adjust the current value of the output current according to the load pumping size of the load L. That is, the current value output by the current sharing unit 214 may be different from the current value output by the current sharing unit 224.

Please refer to FIG. 2, which is a schematic diagram of the circuit structure of the power supply system according to the second preferred embodiment of the present invention. The element structure and function of the power supply system 3 in this embodiment are similar to the power supply system 2 shown in FIG. 1, and the same element numbers represent similar element structures and functions, which will not be repeated here. The power supply system 3 includes a first auxiliary power circuit 32a and a second auxiliary power circuit 32b. The first auxiliary power circuit 32a and the second auxiliary power circuit 32b are electrically connected to the load L and the power supply integration 31 via the DC bus D. The first auxiliary power circuit 32a includes at least one first energy storage unit 321 and a power converter 322 connected to the corresponding first energy storage unit 321. In this embodiment, there are a plurality of them, but it is not limited thereto. Each first energy storage unit 321 provides a first individual auxiliary power through the corresponding power converter 322, so that the first auxiliary power circuit 32a generates the first individual auxiliary power through the first individual auxiliary power output by the at least one power converter 322 The total auxiliary energy to the load L. Similarly, the second auxiliary power circuit 32b includes at least one second energy storage unit 323 and a power converter 324 connected to the corresponding second energy storage unit 323. In this embodiment, it is a plurality, but it is not limit. Each second energy storage unit 323 provides a second individual auxiliary power through the corresponding power converter 324, so that the second auxiliary power circuit 32b generates the second by the second individual auxiliary power output by the at least one power converter 324 The total auxiliary energy to the load L.

In some embodiments, the power density of the first energy storage unit 321 is greater than the power density of the second energy storage unit 323. In some embodiments, the energy density of the first energy storage unit 321 is less than the energy density of the second energy storage unit 323. For example, the first energy storage unit 321 may be, for example, but not limited to a super capacitor; the second energy storage unit 323 may be, for example, but not limited to a battery.

When the input power P is normally powered, the power supply integrated 31 operates and outputs the first DC power to supply power to the load L. The circuit structure and operation of the power supply integration 31 are similar to the power supply integration 21 of FIG. 1 and will not be repeated here. When the control unit 33 determines that the instantaneous power required by the load L is greater than the rated upper limit value of the output power that the power supply integrated 31 can output (for example, based on the detection result of the detection circuit 331), the control unit 33 may The power converter 322 of the first auxiliary power supply circuit 32a of the first energy storage unit 321 with a larger power density is preferentially driven to output the first total auxiliary power to compensate for the instantaneous power required by the load L and the rated upper limit value The difference.

In addition, after a period of time, the power required by the load L continues to exceed the rated upper limit value that the power supply integrated 31 can output, and the energy output by the first auxiliary power circuit 32a is not sufficient to compensate for the power and rated power required by the load When the difference of the upper limit value is reached, the second auxiliary power circuit 32b can provide the second total auxiliary power by driving the power converter 324 to make up for the insufficient part provided by the first auxiliary power circuit 32a.

When the input power P is abnormal, the power supply integration 31 stops functioning. At this time, the control unit 33 can preferentially drive the power converter 324 of the second auxiliary power circuit 32b of the second energy storage unit 323 with a larger energy density to output the second Total auxiliary electrical energy to meet the energy required by load L. On the other hand, when the input power P is abnormal and the second total auxiliary power provided by the second auxiliary power circuit 32b is insufficient to supply the load L (that is, the input power P is abnormal and the instantaneous power required by the load L is greater than the second auxiliary The rated upper limit of the power of the second total auxiliary power provided by the power supply circuit 32b), the control unit 33 can further drive the first auxiliary power supply circuit 32a to operate simultaneously, so that the first auxiliary power supply circuit 32a uses the first total auxiliary power The electric energy compensates the additional power required by the load L.

Specifically, since the energy density (such as the amount of stored electricity) of the second energy storage unit 323 is greater than that of the first energy storage unit 321, when the input power supply P is abnormal and the backup circuit is required to provide energy, the second auxiliary power supply may be preferentially selected The circuit 32b is provided, whereby the duration of the power supply system 3 satisfying the demand power of the load L can be extended. In addition, the power density of the first energy storage unit 321 is greater than that of the second energy storage unit 323, so an additional power supply can be provided to the load L more quickly. Therefore, in the case where the load L requires additional power, the first auxiliary power circuit 32a may be preferentially provided.

However, the present invention is not limited to the above embodiment. In some embodiments, when the input power P is normal and the load L has an instantaneous high power demand, it may also be preferred to drive the second auxiliary power circuit 32b or to drive the first auxiliary power circuit 32a and the second auxiliary power circuit 32b at the same time , To compensate for the additional power demand of the load L. Similarly, when the input power P is abnormal, the first auxiliary power circuit 32a may be preferentially driven or the first auxiliary power circuit 32a and the second auxiliary power circuit 32b may be simultaneously driven to maintain the energy requirement of the load L.

In some embodiments, the first auxiliary power circuit 32a or/and the second auxiliary power circuit 32b may also include a current sharing unit (not shown), the function and operation of which are similar to the current sharing unit 224 of FIG. 2, here No longer. In some embodiments, the first auxiliary power circuit 32a and/or the second auxiliary power circuit 32b may also include at least one switch 325, the function and operation of which are similar to the current sharing unit 223 of FIG. 2 and will not be repeated here. .

In summary, the auxiliary power circuit of the power supply system of this case can operate the power converter to actively enable the auxiliary power when the instantaneous power required by the load is greater than the rated upper limit of the output power of the integrated output of the power supply The total auxiliary energy output by the circuit can compensate for the difference between the instantaneous power required by the load and the rated upper limit. In this way, without increasing the output power of the power supply integration or increasing the number of energy storage units in the auxiliary power supply circuit, the power supply integration will not be overloaded and shut down to cause storage in the auxiliary power supply circuit The energy unit must supply overload electric energy to the load, so the service life of the energy storage unit can be prolonged, and the production cost of the power supply system in this case does not need to increase.

P‧‧‧Input power

L‧‧‧load

2. 3‧‧‧Power supply system

21.31‧‧‧Power supply integration

211、311‧‧‧Power supply

212, 312‧‧‧AC/DC converter

213、313‧‧‧DC/DC converter

214, 224, 314‧‧‧ current sharing circuit

215, 223, 315, 325‧‧‧ switch

216, 222, 316, 322, 324

22‧‧‧Auxiliary power circuit

32a‧‧‧First auxiliary power circuit

321‧‧‧The first energy storage unit

323‧‧‧Second Energy Storage Unit

32b‧‧‧Second auxiliary power supply circuit

221‧‧‧Energy storage unit

23, 33‧‧‧ control unit

231, 331‧‧‧ detection circuit

D‧‧‧DC bus

Figure 1 is a schematic diagram of the circuit structure of the power supply system according to the first preferred embodiment of the present invention. FIG. 2 is a schematic diagram of the circuit structure of the power supply system of the second preferred embodiment of the present case.

P‧‧‧Input power

L‧‧‧load

2‧‧‧Power supply system

21‧‧‧Power supply integration

211‧‧‧Power supply

212‧‧‧AC/DC converter

213‧‧‧DC/DC converter

214, 224‧‧‧ Current sharing circuit

215, 223‧‧‧ switch

216, 222‧‧‧electric energy converter

22‧‧‧Auxiliary power circuit

221‧‧‧Energy storage unit

23‧‧‧Control unit

231‧‧‧ detection circuit

D‧‧‧DC bus

Claims (16)

A power supply system includes: a power supply integrated, electrically connected between an input power supply and a load, and converting the input power supply to a first DC power when the input power supply is normal; a first auxiliary power circuit, electrically connected Between the integration of the power supply and the load, it includes: at least a first energy storage unit to provide a second DC power; and at least a first power converter electrically connected to the at least a first energy storage unit And the load; and a control unit that drives the input power when the input power supply is normal and a first instantaneous power required by the load is greater than a first rated upper limit value of the output power of the integrated output of the power supply At least one first power converter converts the second DC power into a first individual auxiliary power according to the first instantaneous power, so that the first auxiliary power circuit outputs a first through the at least one first individual auxiliary power The total auxiliary electrical energy to compensate for a difference between the first instantaneous power and the first rated upper limit value. The power supply system according to claim 1, further comprising a detection circuit that detects the output power of the integrated output of the power supply and an electrical energy parameter of the load, and the control unit determines according to the detection result of the detection circuit Whether the first instantaneous power required by the load is greater than the first rated upper limit value. The power supply system according to claim 2, wherein the electric energy parameter includes the magnitude of voltage, current, or power required by the load. The power supply system according to claim 1, wherein the first auxiliary power circuit includes a plurality of the first energy storage units and a plurality of the first power converters, each of the first power converters is electrically connected to a corresponding Between the first energy storage unit and the load, and the control unit drives a corresponding amount of the first electrical energy according to the magnitude of the difference between the first instantaneous power required by the load and the first rated upper limit value The converter operates. The power supply system according to claim 4, wherein the auxiliary power circuit includes a plurality of first current sharing circuits, and each of the first current sharing circuits is electrically connected to the corresponding first power converter to adjust the corresponding The current value output by the first power converter is equal to the current value output by other first power converters. The power supply system according to claim 1, wherein the power supply integrated includes a plurality of power supplies, and the plurality of power supplies are connected in parallel, and each of the power supplies includes: a second power converter, Convert the input power to the first DC power; and a second current-sharing circuit electrically connected to the second power converter to adjust the current value output by the second power converter for output with other power supplies The current values are equal. The power supply system according to claim 1, wherein when the input power is abnormal, the power supply integration stops, and the control unit drives the at least one first power converter to convert the second DC power to the first individual auxiliary Electrical energy, so that the first auxiliary power supply circuit supplies the first total auxiliary electrical energy to the load through the at least one first individual auxiliary electrical energy. The power supply system according to claim 1, wherein the first power converter is a bidirectional converter. The power supply system according to claim 1, further comprising a second auxiliary power circuit electrically connected between the power supply integration and the load to provide a second total auxiliary power, and the second auxiliary power circuit includes at least A second energy storage unit, wherein the power density of the at least one first energy storage unit is greater than the power density of the at least one second energy storage unit and/or the energy density of the at least one second energy storage unit is greater than the at least one first energy storage unit The energy density of an energy storage unit. The power supply system according to claim 9, wherein when the input power is abnormal, the power supply integration stops operating, the control unit drives the second auxiliary power circuit to provide the second total auxiliary power to power the load, and When a second instantaneous power required by the load is greater than a second rated upper limit value of the output power output by the second auxiliary power supply circuit, the control unit drives the first auxiliary power supply The circuit provides the first total auxiliary electric energy to compensate the difference between the second instantaneous power and the second rated upper limit value. A power supply system includes: a power supply integrated, electrically connected between an input power supply and a load, and converting the input power supply to a first DC power when the input power supply is normal; a first auxiliary power circuit, electrically connected A first total auxiliary power is provided between the power supply integration and the load; a second auxiliary power circuit is electrically connected between the power supply integration and the load to provide a second total auxiliary power; and A control unit that selectively drives the first auxiliary power supply circuit when the input power supply is normal and a first instantaneous power required by the load is greater than a first rated upper limit value of the output power of the integrated output of the power supply Corresponding to at least one of the second auxiliary power supply circuit to output at least one of the first total auxiliary electrical energy and the second total auxiliary electrical energy to compensate between the first instantaneous power and the first rated upper limit value A difference. The power supply system according to claim 11, wherein the first auxiliary power circuit and the second auxiliary power circuit respectively include at least one first energy storage unit and at least one second energy storage unit, and the at least one first energy storage unit The power density of is greater than the power density of the at least one second energy storage unit and/or the energy density of the at least one second energy storage unit is greater than the energy density of the at least one first energy storage unit. The power supply system according to claim 12, wherein the control unit drives the first auxiliary power circuit to provide the first power supply circuit according to the magnitude of the difference between the first instantaneous power required by the load and the rated upper limit value A total auxiliary electric energy compensates the difference between the first instantaneous power and the first rated upper limit value. The power supply system according to claim 13, wherein when the first total auxiliary power is insufficient to compensate for the difference between the first instantaneous power and the first rated upper limit value, the second auxiliary power circuit is Drive to provide the second total auxiliary electric energy to compensate the insufficient part of the first total auxiliary electric energy. The power supply system according to claim 12, wherein when the input power is abnormal, the power supply integration is stopped, and the control unit drives the second auxiliary power circuit to provide the second total auxiliary power required to maintain the load energy. The power supply system according to claim 15, wherein when the input power supply is abnormal and a second instantaneous power required by the load is greater than a second rated upper limit value of the output power output by the second auxiliary power supply circuit, the control The unit drives the first auxiliary power circuit to provide the first total auxiliary power to compensate for the difference between the second instantaneous power and the second rated upper limit value.

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