CN115498685A - Power supply terminal, power supply control method, control device and storage medium - Google Patents

Abstract

The invention relates to the technical field of power supply, and discloses a power supply terminal, a power supply control method, a control device and a storage medium. In the present invention, when the output of the mains unit is abnormal, the energy unit and the energy storage unit are used to supply power to the load, so as to realize the uninterrupted power supply of multiple power sources. When the output of the mains unit is normal, if the operating power of the load does not exceed the preset peak-shaving power threshold, the dynamic peak-shaving mode is used to supply power to the load, that is, the mains unit and the energy unit are used to supply power to the load. If the operating power of the load exceeds the preset peak-shaving power threshold, the fixed peak-shaving mode is used to supply power The load is powered, that is, the utility unit, the energy unit and the energy storage unit are used to supply power to the load. Peak, improve the utilization rate of mains power, reduce the load of the grid, thereby improving the efficiency of power supply.

Description

Power supply terminal, power supply control method, control device and storage medium

technical field

The present invention relates to the technical field of power supply, in particular to a power supply terminal, a power supply control method, a control device and a storage medium.

Background technique

An Internet data center is a complex set of facilities. It not only includes computer systems and other supporting equipment, but also includes various infrastructure systems such as power distribution systems, refrigeration systems, fire protection systems, and monitoring systems. Among them, the refrigeration system is a large power consumer in the data center, accounting for about 30-45% of the energy consumption of the entire data center. At present, the data center refrigeration system usually uses an uninterruptible power supply (UPS) to ensure power supply. The UPS not only connects to the mains but also carries an energy storage battery. Usually, the data center is powered by the mains. When the mains fails, it is activated in an emergency. Energy storage battery to achieve uninterrupted power supply.

Usually, the higher the outdoor temperature, the greater the power consumption of the cooling load, and the stronger the sunlight, the more electricity generated by photovoltaic power generation. In the prior art, if the photovoltaic power generation is directly combined with the UPS, it is difficult to configure the power capacity among multiple power sources, resulting in low power supply efficiency and heavy grid load.

Contents of the invention

The invention provides a power supply terminal, a power supply control method, a control device and a storage medium, which can realize uninterrupted power supply from multiple power sources and improve power supply efficiency.

In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a power supply control method, which is applied to a power supply system for uninterrupted power supply to loads, wherein the power supply system includes a power supply terminal, and the power supply terminal Connected power supply and load, the power supply includes: a commercial power unit, an energy unit, and an energy storage unit; the power supply control method includes:

judging whether the output of the mains unit is normal;

If not, controlling the energy unit and the energy storage unit to jointly supply power to the load;

If so, then determine whether the operating power of the load exceeds a preset peak-shaving power threshold;

If not, start a dynamic peak-shaving mode, and control the utility power unit and the energy unit to jointly supply power to the load;

If so, start the fixed peak-shaving mode when the capacity value of the energy storage unit is not lower than the preset first capacity threshold, and control the combination of the utility power unit, the energy unit and the energy storage unit The load is powered.

According to an embodiment of the present invention, the power supply control method includes the step of judging whether the capacity value of the energy storage unit is lower than the preset first capacity threshold:

If not, start the fixed peak-shaving mode, and control the utility power unit, the energy unit and the energy storage unit to jointly supply power to the load;

If so, start the dynamic peak-shaving mode, and control the mains unit and the energy unit to jointly supply power to the load.

According to an embodiment of the present invention, before the judging whether the output of the mains unit is normal, it also includes:

The output power of the mains unit, the operating power of the load, the generated power of the energy unit, the capacity value of the energy storage unit, the charging power and the discharging power are acquired.

According to an embodiment of the present invention, the starting of the dynamic peak-shaving mode, and controlling the mains unit and the energy unit to jointly supply power to the load include:

judging whether the capacity value of the energy storage unit is higher than a preset second capacity threshold;

If so, then judge whether the generating power is greater than the operating power;

If the generated power is greater than the operating power, control the energy unit to supply power to the load, and at the same time control the energy unit to feed power to the mains unit;

If the generated power is less than or equal to the operating power, the energy unit and the utility power unit are controlled to jointly supply power to the load.

According to an embodiment of the present invention, after the judging whether the capacity value of the energy storage unit is higher than the preset second capacity threshold, further includes:

If not, then judging that the generating power is greater than the charging power;

If not, the charging power is adjusted according to the generated power, and the energy unit is controlled to charge the energy storage unit according to the charging power.

According to an embodiment of the present invention, after the judging that the generating power is greater than the charging power, further includes:

If so, control the energy unit to charge the energy storage unit according to the charging power, calculate the difference between the generated power and the charging power, and determine whether the difference calculation result is greater than the operating power;

If so, controlling the energy unit to supply power to the load, and at the same time controlling the energy unit to feed power to the mains unit;

If not, control the energy unit and the utility power unit to jointly supply power to the load.

According to an embodiment of the present invention, the starting the fixed peak-shaving mode, and controlling the power unit, the energy unit and the energy storage unit to jointly supply power to the load includes:

calculating the difference between the operating power and the peak clipping power threshold;

judging whether the generated power is greater than the difference calculation result;

If not, control the utility power unit, the energy unit and the energy storage unit to jointly supply power to the load.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a power supply control device, including:

A judging module, used to judge whether the output of the mains unit is normal;

The first execution module is configured to, if not, control the energy unit and the energy storage unit to jointly supply power to the load;

The second execution module is used to judge whether the operating power of the load exceeds a preset peak-shaving power threshold if it is true;

The third execution module is configured to, if not, start a dynamic peak-shaving mode, and control the mains unit and the energy unit to jointly supply power to the load;

The fourth execution module is configured to start the fixed peak-shaving mode when it is judged that the capacity value of the energy storage unit is not lower than the preset first capacity threshold, and control the mains unit, the energy unit and all The three energy storage units jointly supply power to the load.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a power supply terminal, including:

An AC busbar, the AC busbar includes an AC input terminal for connecting to a mains unit and an AC output terminal for connecting to a load;

A DC busbar, the DC busbar includes a first DC input terminal for connecting the energy unit, a second DC input terminal and a DC output terminal for connecting the energy storage unit;

A bidirectional inverter, the bidirectional inverter includes a DC side and an AC side, the DC side is connected to the DC output end, and the AC side is connected to the AC output end;

a first converter unit connected to the first DC input end;

a second converter unit connected to the second DC input end;

A power supply control device is connected to the bidirectional inverter, the first converter unit, and the second converter unit respectively, wherein the power supply control device is configured to implement the power supply control method.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a computer storage medium on which a computer program is stored, and when the computer program is executed by a processor, the above power supply control method is realized.

The beneficial effects of the present invention are: when the output of the mains unit is abnormal, the energy unit and the energy storage unit are used to supply power to the load to realize the uninterrupted power supply of multiple power sources. When the output of the mains unit is normal, if the operating power of the load If the preset peak-shaving power threshold is not exceeded, the dynamic peak-shaving mode is used to supply power to the load, that is, the mains unit and the energy unit are used to supply power to the load. If the operating power of the load exceeds the preset peak-shaving power threshold, the load is powered by The fixed peak-shaving mode supplies power to the load, that is, the combination of the mains unit, the energy unit and the energy storage unit supplies power to the load. In the dynamic peak-shaving mode and the fixed peak-shaving mode, the energy unit and the energy storage unit act as the mains power It can realize peak shaving, improve the utilization rate of mains power, reduce the load of the grid, and thus improve the efficiency of power supply.

Description of drawings

Fig. 1 is a schematic structural diagram of a power supply system according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a power supply terminal according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a power supply terminal according to another embodiment of the present invention;

4 is a schematic flowchart of a power supply control method according to an embodiment of the present invention;

5 is a schematic flowchart of a power supply control method according to another embodiment of the present invention;

6 is a schematic flowchart of a power supply control method according to another embodiment of the present invention;

Fig. 7 is a schematic flow chart of a dynamic peak clipping mode according to an embodiment of the present invention;

Fig. 8 is a schematic flow chart of a fixed peak clipping mode according to an embodiment of the present invention;

Figure 9 is an effect curve diagram of the dynamic peak-shaving mode according to an embodiment of the present invention, wherein Figure a is the operating power curve diagram of the load, Figure b is the power generation curve diagram of the energy unit, and Figure c is the output power of the mains unit Graph;

Fig. 10 is an effect curve diagram of a fixed peak clipping mode according to an embodiment of the present invention;

11 is a schematic structural diagram of a power supply control device according to an embodiment of the present invention;

Fig. 12 is a schematic structural diagram of a computer storage medium according to an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The terms "first", "second", and "third" in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, features defined as "first", "second", and "third" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship between the components in a certain posture (as shown in the accompanying drawings) , sports conditions, etc., if the specific posture changes, the directional indication also changes accordingly. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

Fig. 1 is a power supply system according to an embodiment of the present invention. Please refer to Fig. 1. The power supply system 100 includes a power supply terminal 200, a power supply 101 connected to the power supply terminal 200, and a load 102. The power supply 101 includes a mains unit 1011, an energy unit 1012 and an energy storage unit 1013.

Specifically, the operating power of the load 102 in this embodiment can vary according to time and changes in the application environment, for example, the load of refrigeration equipment. When the load of refrigeration equipment is in spring, autumn or winter of the year, due to the low outdoor The operating power is relatively low, and in summer, due to the high outdoor temperature, the operating power is relatively high.

The energy unit 1012 can be thermal energy, wind energy, electric energy, light energy, etc., preferably a photovoltaic unit.

The energy storage unit 1013 may be an energy storage battery, and the number of the energy storage battery may be one or more, and the specific number is not limited here. The capacity of the energy storage unit 1013 can be configured according to the actual application environment.

The mains unit 1011 is a power grid that can provide alternating current. In one embodiment, the mains unit 1011 is connected to the power supply terminal 200 through a transformer.

FIG. 2 is a power supply terminal according to an embodiment of the present invention. Please refer to FIG. Flow unit 60 and power supply control device 70.

Among them, the AC busbar 10 includes an AC input end for connecting the mains unit 1011 and an AC output end for connecting the load 102; the DC busbar 20 includes a first DC input end for connecting the energy unit 1012 and an AC output end for connecting the energy storage The second DC input terminal and DC output terminal of the unit 1013; the switch unit 30 is arranged between the AC input terminal and the AC output terminal, and is used to control the on-off between the AC input terminal and the AC output terminal; the bidirectional inverter 40 includes The DC side and the AC side, the DC side is connected to the DC output terminal, and the AC side is connected to the AC output terminal; the first converter unit 50 is connected to the first DC input terminal; the second converter unit 60 is connected to the second DC input terminal; power supply The control device 70 is respectively connected with the switch unit 30 , the bidirectional inverter 40 , the first converter unit 50 and the second converter unit 60 .

In a practicable embodiment, the switch unit 30 is a static switch (silicon controlled rectifier), which is a non-contact switch. It is an AC switch formed by connecting two thyristors in reverse parallel. ON is controlled by the power supply control device 70 . In this embodiment, the static switch is used as the control switch of the AC input, which can reduce the equipment cost. Under normal circumstances, the load 102 is directly supplied by the mains. When the mains is directly supplied, the bidirectional inverter 40 can be used as an active filter to reduce harmonics and compensate reactive power, which can improve the system efficiency to More than 99%, while solving the harmonics generated by the load inverter.

In a practicable embodiment, the power supply control device 70 may be a controller, such as a single-chip microcomputer or a PLC. For the control method of the power supply control device 70 , please refer to FIGS. 4-6 .

In a practicable embodiment, the first converter unit 50 may be a DC/DC converter, which is set corresponding to the energy unit 1012, and the energy unit 1012 is connected to the first DC input end through the first converter unit 50 . The first converter unit 50 converts the DC voltage fluctuating within a certain range generated by the energy unit 1012 into a stable output DC voltage by boosting the voltage.

In a realizable embodiment, the second converter unit 60 can be a bidirectional DC/DC converter, which is set corresponding to the energy storage unit 1013, and the energy storage unit 1013 is connected to the second DC input through the second converter unit 60 end connection. The function of the second converter unit 60 is to realize bidirectional DC voltage conversion, voltage stabilization and charge-discharge conversion. If the energy storage unit 1013 includes multiple energy storage batteries, the number of bidirectional DC/DC converters included in the second converter unit 60 is consistent with the number of energy storage batteries.

Fig. 3 is a power supply terminal according to another embodiment of the present invention. Please refer to Fig. 3. The power supply terminal 200 includes an AC bus 10, a DC bus 20, a switch unit 30, a rectifier unit 80, a bidirectional inverter 40, and a first converter unit. 50 , the second converter unit 60 and the power supply control device 70 .

Among them, the AC busbar 10 includes an AC input end for connecting the mains unit 1011 and an AC output end for connecting the load 102; the DC busbar 20 includes a first DC input end for connecting the energy unit 1012 and an AC output end for connecting the energy storage The second DC input terminal and DC output terminal of the unit 1013; the switch unit 30 is arranged between the AC input terminal and the AC output terminal, and is used to control the on-off between the AC input terminal and the AC output terminal; the rectification unit 80 includes a DC side and the AC side, the bidirectional inverter 40 includes a DC side and an AC side, the AC side of the rectifier unit 80 is connected to the AC input end, the DC side of the rectifier unit 80 is connected to the DC side of the bidirectional inverter 40, and the bidirectional inverter 40 The AC side of the bidirectional inverter 40 is connected to the AC output terminal, and the DC side of the bidirectional inverter 40 is also connected to the DC output terminal; the first converter unit 50 is connected to the first DC input terminal; the second converter unit 60 is connected to the second DC input terminal terminal connection; the power supply control device 70 is respectively connected with the switch unit 30 , the bidirectional inverter 40 , the rectifier unit 80 , the first converter unit 50 and the second converter unit 60 .

Wherein, when the rectification unit 80 is in the dynamic peak-shaving mode or the fixed peak-shaving mode, the input current can be limited. For the control method of the power supply control device 70 , please refer to FIGS. 4-8 .

FIG. 4 is a schematic flowchart of a power supply control method according to an embodiment of the present invention. It should be noted that, if substantially the same result is obtained, the method of the present invention is not limited to the flow sequence shown in FIG. 4 . As shown in Figure 4, the method includes:

Step S401: Determine whether the output of the mains unit is normal.

In step S401, the abnormality of the mains unit will affect the output power, voltage or current of the mains unit. In this embodiment, it can be judged whether the output of the mains unit is normal according to the output power, voltage or current. Abnormal conditions of the mains unit include but are not limited to power surges, high voltage breakthroughs, transient overvoltages, voltage sags, low voltages, mains interruptions, noise interference, etc.

In an embodiment of the present invention, please refer to FIG. 5, before step S401, it also includes:

Step S400: Obtain the output power of the mains unit, the operating power of the load, the generated power of the energy unit, the capacity value of the energy storage unit, the charging power and the discharging power.

In step S400, the operating power of the load can be changed according to the time and the application environment, such as the load of the refrigeration equipment. The power is relatively low. In summer, due to the high outdoor temperature, the operating power of the load is relatively high. The energy unit can be thermal energy, wind energy, electric energy, light energy, etc., preferably a photovoltaic unit. The energy storage unit can be an energy storage battery, and the capacity value is the SOC (State of charge) value, which refers to the state of charge of the energy storage unit and can indicate the remaining power of the energy storage unit, that is, the remaining capacity after a period of use or long-term storage. The ratio of its capacity in a fully charged state.

Step S402: If not, control the energy unit and the energy storage unit to jointly supply power to the load.

In step S402, if the output of the mains unit is abnormal, the control switch unit is turned off, and the energy unit and the energy storage unit are controlled to jointly supply power to the load. Generally, the voltage output from the energy unit to the DC bus is slightly higher than the voltage output from the energy storage unit to the DC bus. Specifically, compare the operating power with the generated power. If the operating power is less than the generated power, control the energy unit Supply power to the load, and when the energy storage unit is not fully charged, control the energy unit to charge the energy storage unit according to the charging power, or the energy unit adjusts the output voltage and power through the first converter unit so as to meet the requirements of the load Power dynamic matching; if the generated power is less than the operating power, the energy unit and the energy storage unit are controlled to supply power to the load together, and the discharge power of the energy storage unit is the difference between the generated power and the operating power.

In this embodiment, when the output of the mains unit is abnormal, the energy unit and the energy storage unit are controlled to supply power to the load, so as to realize uninterrupted power supply.

Step S403: If yes, determine whether the operating power of the load exceeds the preset peak-shaving power threshold.

In step S403, if the output of the mains unit is normal, the control switch unit is turned on, and the operating power is compared with the preset peak-shaving power threshold, and the optimal peak-shaving mode (dynamic peak-shaving mode) is selected based on the comparison result. , fixed peak-shaving mode) to realize the power supply to the load, so as to improve the power supply efficiency and reduce the grid load. The preset peak-shaving power threshold is the maximum output power of the mains unit.

Step S404: If not, start the dynamic peak-shaving mode, and control the mains unit and the energy unit to jointly supply power to the load.

In step S404, if the operating power of the load is less than or equal to the preset peak-shaving power threshold, the dynamic peak-shaving mode is started. The dynamic peak-shaving mode is to control the mains unit and the energy unit to supply power to the load. The dynamic peak-shaving mode For the effect curve, please refer to Figure 9 (where Figure a is the operating power curve of the load, Figure b is the power generation curve of the energy unit, and Figure c is the output power curve of the mains unit). In this embodiment, the energy unit serves as a supplement to the mains unit to realize dynamic peak shaving, which can make full use of the mains, improve the utilization rate of the mains, and reduce the load of the power grid.

Step S405: If yes, start the fixed peak-shaving mode when the capacity value of the energy storage unit is not lower than the preset first capacity threshold, and control the utility power unit, the energy unit and the energy storage unit to jointly supply power to the load.

In step S405, because the capacity value of the energy storage unit is too low, it cannot be discharged. Therefore, it is required that the capacity value of the energy storage unit cannot be too low. The minimum capacity value for load discharge.

When the operating power of the load is greater than the preset peak-shaving power threshold, if the capacity value is greater than or equal to the preset first capacity threshold, it means that the energy storage unit can supply power to the load. supply power to the load. See Figure 10 for the effect curve of the fixed peak clipping mode. In this embodiment, the mains unit, the energy unit and the energy storage unit are jointly powered, and the mains unit is supplied with current to realize fixed peak clipping, which can make full use of the mains, improve the utilization rate of the mains, and reduce the load on the power grid.

In a practicable embodiment, please refer to FIG. 6, when the operating power of the load exceeds the preset peak-shaving power threshold, the power supply control method further includes:

Step S406: Determine whether the capacity value of the energy storage unit is lower than a preset first capacity threshold.

In this step, if the capacity value of the energy storage unit is greater than or equal to the preset first capacity threshold, then perform step S407; if the capacity value of the energy storage unit is less than the preset first capacity threshold, then perform step S408.

Step S407: If not, start the fixed peak-shaving mode, and control the utility power unit, the energy unit and the energy storage unit to jointly supply power to the load.

In step S407, if the capacity value of the energy storage unit is greater than or equal to the preset first capacity threshold, it means that the energy storage unit can supply power to the load, and the mains unit, the energy unit and the energy storage unit are controlled to jointly supply power to the load.

Step S408: If yes, start the dynamic peak-shaving mode, and control the mains unit and the energy unit to jointly supply power to the load.

In step S408, if the capacity value of the energy storage unit is smaller than the preset first capacity threshold, it means that the energy storage unit does not supply power, and the dynamic peak-shaving mode needs to be activated. This step is similar to step S404.

In a practicable embodiment, please refer to FIG. 7, step S404 also includes the following steps:

Step S701: Determine whether the capacity value of the energy storage unit is higher than a preset second capacity threshold.

Specifically, the preset second capacity threshold is the capacity value of the full state of the energy storage unit, and the capacity value of the energy storage unit is compared with the second capacity threshold to determine whether the capacity value of the energy storage unit is higher than the second capacity threshold, If yes, the energy storage unit does not need to be charged in the subsequent steps, and if not, the energy storage unit is allowed to be charged in the subsequent steps.

Step S702: If yes, determine whether the generated power is greater than the operating power.

Specifically, if the capacity value of the energy storage unit is greater than the second capacity threshold, it indicates that the energy storage unit is in a full state. Comparing the generated power with the operating power, it can be judged whether the mains unit is required to supply power to the load according to the comparison result.

Step S703: If the generated power is greater than the operating power, control the energy unit to supply power to the load, and at the same time control the energy unit to feed power to the mains unit.

Specifically, if the generated power is greater than the operating power, it means that the power of the energy unit is sufficient to supply power to the load, and there is still remaining power to feed the mains unit, wherein the fed power is the difference between the generated power and the operating power.

Step S704: If the generated power is less than or equal to the running power, control the energy unit and the mains unit to jointly supply power to the load.

Specifically, if the generated power is less than or equal to the operating power, it means that the power of the energy unit is insufficient, and the mains unit needs to be combined to supply power to the load, and the output power of the mains unit is the difference between the operating power and the generated power.

Further, referring to FIG. 7, after step S701, the following steps are also included:

Step S705: If not, it is determined that the generated power is greater than the charging power.

Specifically, if the capacity value of the energy storage unit is less than or equal to the second capacity threshold, it means that the energy storage unit is not fully charged, and the generated power is compared with the charging power, and it can be determined whether the energy unit can charge the energy storage unit according to the comparison result .

Step S706: If not, adjust the charging power according to the generated power, and control the energy unit to charge the energy storage unit according to the charging power.

Specifically, since the first converter unit connected to the energy unit and the second converter unit connected to the energy storage unit are on the same DC bus, after obtaining the generated power, the input voltage of the second converter unit can be adjusted, Make it lower than the output voltage of the first converter unit, and at the same time increase the DC side voltage of the bidirectional inverter, resulting in a lower voltage of the second converter unit, the energy unit charges the energy storage unit, and at the same time adjusts the second converter unit The output voltage and current of the unit control the energy unit to charge the energy storage unit according to the charging power.

Further, referring to FIG. 7, after step S705, the following steps are also included:

Step S707: If yes, control the energy unit to charge the energy storage unit according to the charging power, calculate the difference between the generated power and the charging power, and determine whether the calculated difference is greater than the operating power.

Specifically, according to the generated power and charging power, the DC side input voltage of the bidirectional inverter is adjusted so that it is higher than the input voltage of the second converter unit and lower than the output voltage of the first converter unit, so as to realize the priority of the energy unit Charge the energy storage unit, and then output the remaining power to the AC bus through the bidirectional inverter to supply power to the load. By calculating the difference between the generated power and the charging power, the difference calculation result is compared with the operating power. According to the comparison result, it can be judged whether the remaining power after the energy unit has given priority to charging the energy storage unit is sufficient to supply power to the load.

Step S708: If yes, control the energy unit to supply power to the load, and at the same time control the energy unit to feed power to the mains unit.

Specifically, if the difference calculation result is greater than the operating power, it means that the energy unit gives priority to charging the energy storage unit, and the remaining power is enough to supply power to the load, and there is no need to combine the mains unit to supply power to the load, and it can even feed power to the realization unit. The feed power is The difference between generating power, charging power, and operating power.

Step S709: If not, control the energy unit and the mains unit to jointly supply power to the load.

Specifically, if the difference calculation result is less than or equal to the operating power, it means that the remaining power after the energy unit preferentially charges the energy storage unit is not enough to supply power to the load, and the mains unit needs to be combined to supply power to the load. At this time, the energy unit gives priority to the remaining power after charging the energy storage unit, that is, the output power of the bidirectional inverter is the difference between the generated power and the charging power, and the output power of the mains unit is the operating power of the load and the bidirectional power. The difference between the output power of the inverter.

In a practicable embodiment, please refer to FIG. 8, step S406 also includes the following steps:

Step S801: Calculate the difference between the operating power and the peak-shaving power threshold;

Step S802: Determine whether the generated power is greater than the difference calculation result;

Step S803: If not, control the mains unit, the energy unit and the energy storage unit to jointly supply power to the load.

Specifically, the output power of the mains unit is the peak-shaving power threshold, and the discharge power of the energy storage unit is the difference between the operating power, the output power of the mains unit, and the generated power of the energy unit.

In another practicable embodiment, referring to FIG. 8 , after step S802, the method further includes:

Step S804: If yes, control the energy unit and the mains unit to jointly supply power to the load.

Specifically, the output power of the utility power unit is the difference between the operating power and the generated power.

The power supply control method of the embodiment of the present invention realizes multi-power uninterrupted power supply by using the energy unit and the energy storage unit to supply power to the load when the output of the mains unit is abnormal. When the output of the mains unit is normal, if the load operates If the power does not reach the preset peak-shaving power threshold, the dynamic peak-shaving mode is used to supply power to the load, that is, the mains unit and the energy unit are used to supply power to the load. If the operating power of the load reaches the preset peak-shaving power threshold, then The fixed peak-shaving mode is used to supply power to the load, that is, the utility unit, the energy unit and the energy storage unit are used to supply power to the load. In the dynamic peak-shaving mode and the fixed peak-shaving mode, the energy unit and the energy storage unit act as the main Supplementary electricity, realize peak shaving, improve the utilization rate of mains electricity, reduce the load of the grid, thereby improving the efficiency of power supply.

Fig. 11 is a schematic structural diagram of a power supply control device according to an embodiment of the present invention. As shown in FIG. 11 , the apparatus 110 includes a judgment module 111 , a first execution module 112 , a second execution module 113 , a third execution module 114 and a fourth execution module 115 .

The judging module 111 is used to judge whether the output of the mains unit is normal;

If not, the first execution module 112 is used to control the energy unit and the energy storage unit to jointly supply power to the load;

The second execution module 113 is used to determine whether the operating power of the load exceeds a preset peak-shaving power threshold if it is so;

If not, the third execution module 114 is used to start the dynamic peak-shaving mode, and control the mains unit and the energy unit to jointly supply power to the load;

The fourth execution module 115 is used to start the fixed peak-shaving mode when the capacity value of the energy storage unit is not lower than the preset first capacity threshold, and control the combination of the mains unit, the energy unit and the energy storage unit to load power supply.

In one embodiment, the fourth execution module 115 is also used to judge whether the capacity value of the energy storage unit is lower than the preset first capacity threshold if it is true;

If not, start the fixed peak-shaving mode, and control the combination of the mains unit, the energy unit and the energy storage unit to supply power to the load;

If yes, start the dynamic peak-shaving mode, and control the mains unit and the energy unit to jointly supply power to the load.

In another embodiment, the device 110 also includes an acquisition module, which is used to acquire the output power of the mains unit, the operating power of the load, the generated power of the energy unit, and the output power of the energy storage unit before judging whether the output of the mains unit is normal. Capacity value, charging power and discharging power.

Specifically, starting the dynamic peak-shaving mode, and controlling the mains unit and the energy unit to jointly supply power to the load includes:

judging whether the capacity value of the energy storage unit is higher than a preset second capacity threshold;

If so, it is judged whether the generated power is greater than the operating power;

If the generated power is greater than the operating power, control the energy unit to supply power to the load, and at the same time control the energy unit to feed power to the mains unit;

If the generated power is less than or equal to the operating power, the control energy unit and the mains unit jointly supply power to the load.

Further, after judging whether the capacity value of the energy storage unit is higher than the preset second capacity threshold, it also includes:

If not, it is judged that the generating power is greater than the charging power;

If not, the charging power is adjusted according to the generated power, and the energy unit is controlled to charge the energy storage unit according to the charging power.

Furthermore, after judging that the generating power is greater than the charging power, it also includes:

If so, control the energy unit to charge the energy storage unit according to the charging power, calculate the difference between the generated power and the charging power, and determine whether the calculated result of the difference is greater than the operating power;

If so, control the energy unit to supply power to the load, and at the same time control the energy unit to feed power to the mains unit;

If not, control the energy unit and the mains unit to jointly supply power to the load.

Specifically, starting the fixed peak-shaving mode and controlling the combination of the mains unit, the energy unit and the energy storage unit to supply power to the load includes:

Calculate the difference between the operating power and the peak clipping power threshold;

Judging whether the generated power is greater than the difference calculation result;

If not, control the commercial power unit, the energy unit and the energy storage unit to jointly supply power to the load.

Referring to FIG. 12 , FIG. 12 is a schematic structural diagram of a computer storage medium according to an embodiment of the present invention. The computer storage medium in the embodiment of the present invention stores the program file 120 capable of realizing all the above-mentioned methods, wherein the program file 120 can be stored in the above-mentioned computer storage medium in the form of a software product, including several instructions to make a computer device (It may be a personal computer, a server, or a network device, etc.) or a processor (processor) executes all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned computer storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc., which can store program codes. Media, or terminal devices such as computers, servers, mobile phones, and tablets.

In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated. to another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

The above is only the embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields, All are included in the scope of patent protection of the present invention in the same way.

Claims (10)

1. A power supply control method, which is applied to a power supply system for uninterrupted power supply to a load, wherein the power supply system includes a power supply terminal, a power supply connected to the power supply terminal, and a load, and the power supply includes: An electric unit, an energy unit, and an energy storage unit; the power supply control method includes: judging whether the output of the mains unit is normal; If not, controlling the energy unit and the energy storage unit to jointly supply power to the load; If so, then determine whether the operating power of the load exceeds a preset peak-shaving power threshold; If not, start a dynamic peak-shaving mode, and control the utility power unit and the energy unit to jointly supply power to the load; If so, start the fixed peak-shaving mode when the capacity value of the energy storage unit is not lower than the preset first capacity threshold, and control the combination of the utility power unit, the energy unit and the energy storage unit The load is powered. 2. The power supply control method according to claim 1, characterized in that the power supply control method comprises the step of judging whether the capacity value of the energy storage unit is lower than the preset first capacity threshold: If not, start the fixed peak-shaving mode, and control the utility power unit, the energy unit and the energy storage unit to jointly supply power to the load; If so, start the dynamic peak-shaving mode, and control the mains unit and the energy unit to jointly supply power to the load. 3. The power supply control method according to claim 2, wherein before said judging whether the output of the mains unit is normal, further comprising: The output power of the mains unit, the operating power of the load, the generated power of the energy unit, the capacity value of the energy storage unit, the charging power and the discharging power are acquired. 4. The power supply control method according to claim 3, wherein the starting of the dynamic peak-shaving mode, and controlling the mains unit and the energy unit to jointly supply power to the load comprises: judging whether the capacity value of the energy storage unit is higher than a preset second capacity threshold; If so, then judge whether the generating power is greater than the operating power; If the generated power is greater than the operating power, control the energy unit to supply power to the load, and at the same time control the energy unit to feed power to the mains unit; If the generated power is less than or equal to the operating power, the energy unit and the utility power unit are controlled to jointly supply power to the load. 5. The power supply control method according to claim 4, characterized in that after the judging whether the capacity value of the energy storage unit is higher than a preset second capacity threshold, further comprising: If not, then judging that the generating power is greater than the charging power; If not, the charging power is adjusted according to the generated power, and the energy unit is controlled to charge the energy storage unit according to the charging power. 6. The power supply control method according to claim 5, characterized in that after the judging that the generated power is greater than the charging power, further comprising: If so, control the energy unit to charge the energy storage unit according to the charging power, calculate the difference between the generated power and the charging power, and determine whether the difference calculation result is greater than the operating power; If so, controlling the energy unit to supply power to the load, and at the same time controlling the energy unit to feed power to the mains unit; If not, control the energy unit and the utility power unit to jointly supply power to the load. 7. The power supply control method according to claim 3, wherein the fixed peak-shaving mode is started, and the mains unit, the energy unit and the energy storage unit are controlled to jointly carry out the load on the load. Power supply includes: calculating the difference between the operating power and the peak clipping power threshold; judging whether the generated power is greater than the difference calculation result; If not, control the utility power unit, the energy unit and the energy storage unit to jointly supply power to the load. 8. A power supply control device, characterized in that it comprises: A judging module, used to judge whether the output of the mains unit is normal; The first execution module is configured to, if not, control the energy unit and the energy storage unit to jointly supply power to the load; The second execution module is used to judge whether the operating power of the load exceeds a preset peak-shaving power threshold if it is true; The third execution module is configured to, if not, start a dynamic peak-shaving mode, and control the mains unit and the energy unit to jointly supply power to the load; The fourth execution module is configured to start the fixed peak-shaving mode when the capacity value of the energy storage unit is not lower than the preset first capacity threshold, and control the utility power unit, the energy unit and the The three energy storage units jointly supply power to the load. 9. A power supply terminal, characterized in that it comprises: An AC busbar, the AC busbar includes an AC input terminal for connecting to a mains unit and an AC output terminal for connecting to a load; A DC busbar, the DC busbar includes a first DC input terminal for connecting the energy unit, a second DC input terminal and a DC output terminal for connecting the energy storage unit; A bidirectional inverter, the bidirectional inverter includes a DC side and an AC side, the DC side is connected to the DC output end, and the AC side is connected to the AC output end; a first converter unit connected to the first DC input end; a second converter unit connected to the second DC input end; and The power supply control device is respectively connected to the bidirectional inverter, the first conversion unit and the second conversion unit, wherein the power supply control device is used to perform the operation described in any one of claims 1-7. The power supply control method described above. 10. A computer storage medium, on which a computer program is stored, wherein when the computer program is executed by a processor, the power supply control method according to any one of claims 1-7 is realized.

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