CN115001113A

CN115001113A - Power supply control method and device and power supply equipment

Info

Publication number: CN115001113A
Application number: CN202210845227.0A
Authority: CN
Inventors: 宫新光
Original assignee: Hangpei Technology Shenzhen Co ltd
Current assignee: Shenzhen Hangyi Intellectual Property Services Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-09-02
Anticipated expiration: 2042-07-19
Also published as: CN115001113B

Abstract

The invention relates to the technical field of power supply, in particular to a power supply control method, a power supply control device and power supply equipment. The power supply control method comprises the following steps: judging whether the maximum output power of the new energy power supply unit is smaller than the output power of the power supply system; if so, controlling the new energy power supply unit to supply power to the power utilization unit access end by the maximum output power of the new energy power supply unit; judging whether the maximum output power of the power grid power supply unit is greater than or equal to the first required compensation power or not; if so, controlling the power grid power supply unit to supply power to the power utilization unit access end by first required compensation power; judging whether the SOC value is smaller than a preset electric quantity value or not; if so, acquiring the maximum charging power of the energy storage battery and the extra power of the power supply unit of the power grid; judging whether the extra power of the power grid power supply unit is greater than or equal to the maximum charging power; and if so, controlling the power supply unit of the power grid to charge the energy storage battery with the maximum charging power. Through the mode, the energy storage battery can be called quickly to provide power.

Description

Power supply control method and device and power supply equipment

Technical Field

The invention relates to the technical field of power supply, in particular to a power supply control method, a power supply control device and power supply equipment.

Background

Generally, new energy is supplied to the power network, and the energy transmitted by the power grid includes new energy power generation and is used as an input power source to provide power output to a load at a user end. With the wide application of new energy power supply, a user can use new energy such as solar power generation in buildings such as a park or a building, so that after the new energy is supplied to a power grid, the power grid input end directly supplies power to a user end, but because the new energy is unstable in power supply or a power supply system is easy to have power supply faults, when the electric quantity of an energy storage battery in the power supply system is insufficient, the energy storage battery cannot be charged in time, and the energy storage battery cannot be called quickly to supply power subsequently.

Disclosure of Invention

In view of the above problems, the present invention provides a power supply control method, device and power supply apparatus, which can enable an energy storage battery to be charged quickly, so that the energy storage battery can be called quickly to provide power subsequently.

According to an aspect of the present invention, there is provided a power supply control method including: acquiring output power of a power supply system, wherein the power supply system comprises a new energy power supply unit, a power grid power supply unit, an energy storage battery and a power utilization unit access end; acquiring the maximum output power of a new energy power supply unit; judging whether the maximum output power of the new energy power supply unit is smaller than the output power of the power supply system; if so, controlling the new energy power supply unit to supply power to the power utilization unit access end by the maximum output power of the new energy power supply unit; acquiring the maximum output power of a power grid power supply unit and first required compensation power, wherein the first required compensation power is the difference between the output power of a power supply system and the maximum output power of a new energy power supply unit; judging whether the maximum output power of the power grid power supply unit is greater than or equal to the first required compensation power or not; if so, controlling the power grid power supply unit to supply power to the power utilization unit access end by first required compensation power; acquiring a state of charge (SOC) value of an energy storage battery; judging whether the SOC value is smaller than a preset electric quantity value or not; if so, acquiring the maximum charging power of the energy storage battery and the extra power of the power grid power supply unit, wherein the extra power of the power grid power supply unit is the difference between the maximum output power of the power grid power supply unit and the first required compensation power; judging whether the extra power of the power grid power supply unit is greater than or equal to the maximum charging power or not; if so, controlling the power supply unit of the power grid to charge the energy storage battery with the maximum charging power; and if not, controlling the power grid power supply unit to charge the energy storage battery with the extra power of the power grid power supply unit.

The power supply control method provided by the application provides power to the power utilization unit access end by controlling the new energy power supply unit with the maximum output power of the new energy power supply unit, the power of the new energy power supply unit can be used for providing power for the access end of the power utilization unit, the ratio of new energy in a power supply system is improved, the carbon emission is reduced, however, the new energy power supply unit is prone to a situation where the supply of power to the power consumer access terminal is insufficient, and when this occurs, then the power supply unit of the power grid is controlled to provide electric power to the access end of the power utilization unit with the first required compensation power, so that the sum of the first required compensation power of the power supply unit of the power grid and the maximum output power of the new energy power supply system is equal to the power of the electric power provided by the power supply system to the access end of the power utilization unit, therefore, the power grid power supply unit and the new energy power supply unit provide stable and sufficient power for the power utilization unit access end together. And finally, judging whether the extra power of the power grid power supply unit is greater than or equal to the maximum charging power, if so, controlling the power grid power supply unit to charge the energy storage battery with the maximum charging power, otherwise, controlling the power grid power supply unit to charge the energy storage battery with the extra power of the power grid power supply unit, realizing full utilization of electric energy under the condition of ensuring the charging safety of the energy storage battery, and enabling the energy storage battery to quickly obtain the electric energy to provide a reliable basis for subsequent discharging.

In an optional manner, after determining whether the maximum output power of the new energy power supply unit is smaller than the output power of the power supply system, the method further includes: if not, controlling the new energy power supply unit to supply power to the power utilization unit access end by the output power of the power supply system; acquiring an SOC value of an energy storage battery; judging whether the SOC value is smaller than a preset electric quantity value or not; if so, acquiring the maximum charging power of the energy storage battery and the extra power of the new energy power supply unit, wherein the extra power of the new energy power supply unit is the difference value between the maximum output power of the new energy power supply unit and the output power of the power supply system; judging whether the extra power of the new energy power supply unit is greater than or equal to the maximum charging power; if so, controlling the new energy power supply unit to charge the energy storage battery with the maximum charging power; if not, the new energy power supply unit is controlled to charge the energy storage battery with the extra power of the new energy power supply unit. When the maximum output power of the new energy power supply unit is judged to be larger than or equal to the output power of the power supply system, the new energy power supply unit is controlled to supply power to the power utilization unit access end and charge the energy storage battery, so that the whole power supply system is powered by new energy, the new energy is fully utilized, and the environmental pollution is reduced. Furthermore, the SOC value of the energy storage battery is judged to be less than 100%, and then the new energy power supply unit is controlled to charge the energy storage battery with the maximum charging power, so that the energy storage battery can be quickly charged to a preset electric quantity value, and the energy storage battery can be prevented from being damaged due to the fact that the charging power is greater than the acceptable maximum charging power. When the power supply system has insufficient power, the energy storage battery can quickly enter a power supply state to provide power for the power utilization unit access end.

In an alternative, the power supply system further comprises a power generating unit. After judging whether the maximum output power of the power grid supply unit is greater than or equal to the first required compensation power, the method further comprises the following steps: if not, acquiring the maximum output power of the power generation unit; judging whether the maximum output power of the power generation unit is greater than or equal to the first required compensation power; and if so, controlling the power generation unit to provide power to the access end of the power utilization unit by the first required compensation power. The new energy power supply unit provides power for the power utilization unit by the maximum output power which can be provided, the power supply ratio of the new energy power supply unit in a power supply system can be improved, the carbon emission is reduced, in this case, by determining that the maximum output power of the grid power supply unit is smaller than the first required compensation power, that is, when the grid power supply unit is not enough to compensate the first required compensation power required to compensate the power consumption unit access end, the maximum output power of the power generation unit is obtained, and when the maximum output power of the power generation unit is judged to be larger than or equal to the first required compensation power, the power generation unit is controlled to provide power to the access end of the power utilization unit by the first required compensation power, the power supply sequence of the power generation unit is arranged at the end so as to reduce the environmental pollution to the maximum extent, the power generation unit and the new energy power supply unit provide power together, and the power supply system is guaranteed to provide stable power for the power utilization unit access end.

In an alternative form, after controlling the power generating unit to provide power to the power-using unit access at the first desired compensatory power, the method further comprises: acquiring an SOC value of an energy storage battery; judging whether the SOC value is smaller than a preset electric quantity value or not; if so, acquiring the maximum charging power of the energy storage battery and the extra power of the power generation unit, wherein the extra power of the power generation unit is the difference value between the maximum output power of the power generation unit and the first required compensation power; judging whether the extra power of the power generation unit is greater than or equal to the maximum charging power; if so, controlling the power generation unit to charge the energy storage battery with the maximum charging power; if not, the power generation unit is controlled to charge the energy storage battery with the extra power of the power generation unit. By judging that the SOC value is less than 100%, then obtaining the maximum charging power of the energy storage battery and the extra power of the power generation unit, wherein the extra power of the power generation unit is the difference value between the maximum output power of the power generation unit and the first required compensation power, and finally judging whether the extra power of the power generation unit is greater than or equal to the maximum charging power or not, the energy storage battery can be charged quickly, and the energy storage battery can be prevented from being damaged due to the fact that the charging power is greater than the acceptable maximum charging power. When the power supply system has insufficient power, the energy storage battery can quickly enter a power supply state to provide power for the power utilization unit access end.

In an optional manner, after determining whether the maximum output power of the power generation unit is greater than or equal to the first required compensation power, the method further includes: if not, controlling the power generation unit to provide power to the power utilization unit access end by the maximum output power of the power generation unit; acquiring an SOC value of an energy storage battery; judging whether the SOC value is larger than a preset SOC threshold value or not; if so, acquiring the maximum discharge power of the energy storage battery and second required compensation power, wherein the second required compensation power is the difference between the first required compensation power and the maximum output power of the power generation unit; judging whether the maximum discharge power is greater than or equal to the second required compensation power; if so, controlling the energy storage battery to provide power to the power utilization unit access end by second required compensation power; and if not, controlling the energy storage battery to supply power to the access end of the power utilization unit by using the maximum discharge power. The power supply of the new energy power supply unit is provided to the power utilization unit access end by the maximum output power which can be provided through controlling the new energy power supply unit, the power supply proportion of the new energy power supply unit in the power supply system is improved, the environmental pollution is reduced, then the maximum output power provided by controlling the power generation unit is used for providing power to the power utilization unit access end, the power supply proportion of the power generation unit in the power supply system is improved, sufficient power is provided to the power utilization unit access end as far as possible, and finally the power is provided to the power utilization unit access end through controlling the energy storage battery, so that the new energy power supply unit, the power generation unit and the energy storage battery provide sufficient power to the power utilization unit access end together. In addition, through judging that the maximum discharge power is greater than or equal to the second required compensation power, the energy storage battery is controlled to provide electric power to the power utilization unit access end with the second required compensation power, the part that the electric power of the power utilization unit access end is insufficient can be quickly compensated, namely the second required compensation power, so that the power utilization unit can be normally supplied with the electric power after the power utilization unit is accessed by the power utilization unit access end. The maximum discharge power is judged to be smaller than the second required compensation power, the energy storage battery is controlled to provide power to the power utilization unit access end through the maximum discharge power, the required power can be provided to the power utilization unit input end as far as possible, the energy storage battery can be prevented from being damaged due to the fact that the discharge power of the energy storage battery is too large, and the effect of protecting the energy storage battery is achieved.

In an optional manner, after determining whether the maximum output power of the grid power supply unit is greater than or equal to the first required compensation power, the method further includes: if not, controlling the power grid power supply unit to supply power to the power utilization unit access end by the maximum output power of the power grid power supply unit; acquiring an SOC value of an energy storage battery; judging whether the SOC value is larger than a preset SOC threshold value or not; if so, acquiring the maximum discharge power of the energy storage battery and third required compensation power, wherein the third required compensation power is the difference between the first required compensation power and the maximum output power of the power grid power supply unit; judging whether the maximum discharge power is greater than or equal to the third required compensation power; if so, controlling the energy storage battery to provide power to the power utilization unit access end by third required compensation power; and if not, controlling the energy storage battery to supply power to the access end of the power utilization unit by using the maximum discharge power. The method and effect for controlling the new energy power supply unit, the power grid power supply unit and the energy storage battery to supply power to the power utilization unit access end are the same as the method and effect for controlling the new energy power supply unit, the power generation unit and the energy storage battery to supply power to the power utilization unit access end, and the pollution of the power generation unit to the environment during working can be reduced by preferentially adopting the power grid power supply unit for supplying power.

In an alternative mode, obtaining the output power of the power supply system comprises: under the condition that the power utilization unit is not connected to the power utilization unit at the power utilization unit connection end, acquiring rated output power of a power supply system as output power of the power supply system; and acquiring the required power of the electricity utilization unit as the output power of the power supply system under the condition that the electricity utilization unit is connected to the electricity utilization unit at the electricity utilization unit access end. By the method, the power supply system can respectively provide rated output power or required power of the power utilization unit to the power utilization unit access end according to the actual condition that the power utilization unit access end has no power utilization unit access, and the power supply system can adjust and provide the power according to the real-time required power of the power utilization unit under the condition that the power utilization unit access end is connected with the power utilization unit.

According to another aspect of the embodiments of the present invention, there is also provided a power supply control apparatus including: the first acquisition module is used for acquiring the output power of a power supply system, and the power supply system comprises a new energy power supply unit, a power grid power supply unit, an energy storage battery and a power utilization unit access end; the second acquisition module is used for acquiring the maximum output power of the new energy power supply unit; the first judgment module is used for judging whether the maximum output power of the new energy power supply unit is smaller than the output power of the power supply system; the first control module is used for controlling the new energy power supply unit to supply electric power to the power utilization unit access end by the maximum output power of the new energy power supply unit when the maximum output power of the new energy power supply unit is smaller than the output power of the power supply system; the third acquisition module is used for acquiring the maximum output power of the power grid power supply unit and first required compensation power, wherein the first required compensation power is the difference between the output power of the power supply system and the maximum output power of the new energy power supply unit; the second judgment module is used for judging whether the maximum output power of the power grid power supply unit is greater than or equal to the first required compensation power or not; the second control module is used for controlling the power grid power supply unit to supply power to the power utilization unit access end by the first required compensation power when the maximum output power of the power grid power supply unit is greater than or equal to the first required compensation power; the fourth acquisition module is used for acquiring the SOC value of the energy storage battery; the third judging module is used for judging whether the SOC value is smaller than a preset electric quantity value or not; the fifth acquisition module is used for acquiring the maximum charging power of the energy storage battery and the extra power of the power grid power supply unit when the SOC value is smaller than the preset electric quantity value, wherein the extra power of the power grid power supply unit is the difference value between the maximum output power of the power grid power supply unit and the first required compensation power; the fourth judgment module is used for judging whether the extra power of the power grid power supply unit is greater than or equal to the maximum charging power; the third control module is used for controlling the power grid power supply unit to charge the energy storage battery with the maximum charging power when the additional power of the power grid power supply unit is greater than or equal to the maximum charging power; and the fourth control module is used for controlling the power grid power supply unit to charge the energy storage battery with the extra power of the power grid power supply unit when the extra power of the power grid power supply unit is smaller than the maximum charging power.

In the power supply control device that this application provided, provide electric power with new forms of energy power supply unit's maximum output power to power consumption unit incoming end through first control module control new forms of energy power supply unit, can make new forms of energy power supply unit's electric power all be used for providing electric power to power consumption unit incoming end, improve the new forms of energy and account for in power supply system, reduce carbon and discharge, but new forms of energy power supply unit appears providing the condition that electric power is not enough to power consumption unit incoming end easily, the power of the not enough part of electric power is first required compensation power. And then the second control module controls the power grid power supply unit to provide electric power to the power utilization unit access end by the first required compensation power, so that the sum of the first required compensation power of the power grid power supply unit and the maximum output power of the new energy power supply system is equal to the power of the electric power provided by the power supply system to the power utilization unit access end, and the power grid power supply unit and the new energy power supply unit provide stable electric power to the power utilization unit access end together. And finally, whether the extra power of the power grid power supply unit is greater than or equal to the maximum charging power is judged through a fourth judgment module, if so, the power grid power supply unit is controlled by a third control module to charge the energy storage battery with the maximum charging power, if not, the power grid power supply unit is controlled by a fourth control module to charge the energy storage battery with the extra power of the power grid power supply unit, so that the power grid power supply unit can provide stable electricity for the energy storage battery, the energy storage battery can be rapidly charged to a preset electric quantity value, the energy storage battery can be prevented from being damaged due to the fact that the charging power is greater than the acceptable maximum charging power, when the power supply system is insufficient, the energy storage battery can rapidly enter a power supply state to provide electricity for the access end of the power utilization unit, and the time for providing the electricity is long.

According to another aspect of the embodiments of the present invention, there is also provided a power supply apparatus including a controller including: the processor, the memory and the communication interface complete mutual communication through the communication bus; the memory is used for storing at least one executable instruction, and the executable instruction causes the processor to execute the operation of the power supply control method.

In an optional mode, the power supply device further comprises a new energy power supply unit, a power grid power supply unit, an energy storage battery and a power utilization unit access end, and the new energy power supply unit, the power grid power supply unit, the energy storage battery and the power utilization unit access end are all electrically connected with the controller.

The above description is only an overview of the technical solutions of the present invention, and the present invention can be implemented in accordance with the content of the description so as to make the technical means of the present invention more clearly understood, and the above and other objects, features, and advantages of the present invention will be more clearly understood.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a flowchart of a power supply control method according to an embodiment of the present invention;

FIG. 2 is a flowchart illustrating a negative determination at step 130 of FIG. 1;

FIG. 3 is a flowchart illustrating a negative determination at step 160 of FIG. 1;

FIG. 4 is a flowchart subsequent to step 163 of FIG. 3;

FIG. 5 is a flowchart illustrating a negative determination at step 162 of FIG. 3;

FIG. 6 is a flowchart illustrating another embodiment of the method shown in FIG. 1 after the determination of NO at step 160;

fig. 7 is a schematic structural diagram of a power supply control device according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a controller in a power supply device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a power supply device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a power supply device according to another embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein.

At present, in order to reduce carbon emission and protect the environment so as to realize comprehensive coordinated sustainable development, after new energy is supplied to a power grid, the power grid is directly supplied to a user end from a power grid input end. The power supply system needs peak shaving to provide sufficient power to the user terminal after the power utilization peak or partial failure of the power supply system.

However, when the peak shaving is required by the current power supply system to provide sufficient power for a user terminal, the problems that the power supply among different power supply units is unreasonable, the carbon emission is not reduced as much as possible, and the insufficient power cannot be quickly called when the energy storage battery needs to be called exist.

Based on the above, the invention provides a power supply control method, which controls a new energy power supply unit to supply power to a power utilization unit access end with the maximum output power of the new energy power supply unit, the electric power of the new energy power supply unit can be used for providing the electric power for the access end of the power utilization unit, the occupation ratio of the new energy in the power supply system is improved, the carbon emission is reduced, however, the new energy power supply unit is prone to a situation where the supply of power to the power consumption unit access terminal is insufficient, and when this occurs, then the power supply unit of the power grid is controlled to provide electric power to the access end of the power utilization unit with the first required compensation power, so that the sum of the first required compensation power of the power supply unit of the power grid and the maximum output power of the new energy power supply system is equal to the power of the electric power provided by the power supply system to the access end of the power utilization unit, therefore, the power grid power supply unit and the new energy power supply unit provide stable and sufficient power for the power utilization unit access end together. And finally, judging whether the extra power of the power grid power supply unit is greater than or equal to the maximum charging power, if so, controlling the power grid power supply unit to charge the energy storage battery with the maximum charging power, otherwise, controlling the power grid power supply unit to charge the energy storage battery with the extra power of the power grid power supply unit, realizing full utilization of electric energy under the condition of ensuring the safety of battery charging, and the energy storage battery can obtain the electric energy at the highest speed to provide a reliable basis for subsequent discharging, and simultaneously avoiding the damage of the energy storage battery due to the fact that the charging power is greater than the acceptable maximum charging power.

Referring specifically to fig. 1, fig. 1 is a flowchart illustrating a power supply control method according to an embodiment of the present invention, where the method is executed by a computing device. The computing device may be, for example, a controller, a computer, a server, or the like. As shown in fig. 1, the method comprises the steps of:

step 110: the method comprises the steps of obtaining output power of a power supply system, wherein the power supply system comprises a new energy power supply unit, a power grid power supply unit, an energy storage battery and a power utilization unit access end.

The output power of the power supply system comprises power output by at least one of the new energy power supply unit, the power grid power supply unit and the energy storage battery. The power supply system provides power for the power utilization unit access end, and provides a power foundation for the access of the power utilization unit. After the new energy power supply unit, the power grid power supply unit and the energy storage battery are connected in parallel to the direct current bus, the direct current bus is connected with the power utilization unit access end. The output power of the power supply system can be preset on the computing device, namely the output power of the power supply system is the rated output power of the power supply system, and can also be determined by detecting the working power of the power utilization unit after the power utilization unit access end is connected to the power utilization unit.

The power utilization unit access end is used for accessing the power utilization unit. The power unit access end can be a socket, a connector, a power station and the like. The power utilization unit is connected to the power utilization unit connecting end, and the power supply system supplies power to the power utilization unit through the power utilization unit connecting end.

Step 120: and acquiring the maximum output power of the new energy power supply unit.

The new energy power supply unit can be a new energy power unit which generates electric energy by solar energy, wind energy, biomass energy, geothermal energy and the like. Compared with the traditional energy, the new energy generally has the advantages of less pollution and large reserve, and has important significance for solving the problems of environmental pollution and energy shortage in the world at present. The new energy power supply unit can be used for generating power by using new energy such as solar energy in buildings such as large logistics parks and data center applications for users, and directly supplies power to loads of the users without the input end of a power grid. It is therefore preferred to use the new energy supply unit to supply power.

The maximum output power of the new energy power supply unit may be the maximum power output by the new energy power supply unit preset on the computing device or the new energy power supply unit, or the maximum power which can be output by the new energy power supply unit in real time. For the situation that the maximum output power of the new energy power supply unit is the maximum power output by the new energy power supply unit in real time, the maximum output power of the new energy power supply unit can be determined by detecting the voltage, the current and the power factor of the new energy power supply unit and calculating based on the detected voltage, the detected current and the detected power factor.

Step 130: and judging whether the maximum output power of the new energy power supply unit is smaller than the output power of the power supply system or not.

If yes, go to step 140: and controlling the new energy power supply unit to supply power to the power utilization unit access end by the maximum output power of the new energy power supply unit.

The step can enable the electric power of the new energy power supply unit to be used for providing the electric power for the access end of the power utilization unit, so that the occupation ratio of the new energy in a power supply system is improved, and the carbon emission is reduced. However, the new energy power supply is easily affected by environmental factors such as seasons, weather, temperature, etc., so the new energy power supply unit is easily unstable in power supply, and the situation that the power supplied to the input end of the power utilization unit is insufficient is easily caused.

Step 150: the method comprises the steps of obtaining the maximum output power of a power grid power supply unit and first required compensation power, wherein the first required compensation power is the difference between the output power of a power supply system and the maximum output power of a new energy power supply unit.

Because the power supply of the power grid power supply unit is stable and reliable, the power grid power supply unit is preferably used under the condition that the power supplied by the new energy power supply unit is insufficient, so that the power grid power supply unit and the new energy power supply unit supply power together.

The maximum output power of the power grid power supply unit may be the maximum power output by the power grid power supply unit preset on the computing device or the power grid power supply unit, or the maximum power which can be output by the power grid power supply unit in real time. For the case that the maximum output power of the grid power supply unit is the real-time maximum output power of the grid power supply unit, the maximum output power of the grid power supply unit may be determined by detecting the voltage, the current, and the power factor of the grid power supply unit and calculating based on the detected voltage, the current, and the power factor. The maximum output power of the power grid power supply unit and the first required compensation power are not acquired sequentially, and can be acquired simultaneously or one of the maximum output power and the first required compensation power is acquired first and then the other one of the maximum output power and the first required compensation power is acquired.

Step 160: judging whether the maximum output power of the power grid power supply unit is greater than or equal to the first required compensation power or not;

if yes, go to step 170: and controlling the power grid power supply unit to supply power to the power utilization unit access end with the first required compensation power.

In this step, the grid power supply unit compensates the power, which is not enough to be provided to the input end of the power consumption unit in the step 150, to the power consumption unit access end with the first required compensation power, so that the grid power supply unit and the new energy power supply unit provide stable power to the power consumption unit access end together. The first required compensation power of the grid power supply unit is also the first required compensation power of the power utilization unit access terminal. The sum of the first required compensation power provided by the power grid supply unit and the maximum output power provided by the new energy power supply system is equal to the power of the power provided by the power supply system to the power utilization unit access terminal.

After the grid power supply unit provides power to the power consumption unit access end, the grid power supply unit may have surplus available power. And when the power supply system provides insufficient power to the power utilization unit access terminal, for example, the new energy power supply unit or the grid power supply unit encounters an emergency such as insufficient power, the energy storage battery may need to be accessed into the power supply system to supply power to the power utilization unit for the need at any time.

Therefore, after this step, the extra power of the grid unit is considered to be used for charging the energy storage battery, so as to ensure that the energy storage battery has the capability of supplementing electric energy at any time.

Step 180: and acquiring the SOC value of the energy storage battery.

Wherein the SOC value is the real-time state of charge of the energy storage battery. The SOC value of the energy storage battery can be determined by detecting real-time battery parameters such as voltage, current and batteries of the energy storage battery, and the real-time battery parameters can be acquired through a voltage sensor, a current sensor or a sampling chip. After the real-time voltage and current of the battery in the battery energy storage system are obtained, the SOC values corresponding to the voltage and the current can be obtained through the corresponding relation between the voltage and the current and the SOC values. For example, a correspondence table between a voltage, a current, and an SOC value may be preset in a Battery Management System (BMS) of the energy storage Battery, and after the voltage is detected by a voltage and current sensor or a sampling chip, the SOC value corresponding to the voltage may be obtained by looking up the table.

Step 190: judging whether the SOC value is smaller than a preset electric quantity value or not;

the preset electric quantity value is the preset electric quantity value of the energy storage battery. The preset electric quantity value can be 100% or less than 100%.

If yes, go to step 200: and acquiring the maximum charging power of the energy storage battery and the extra power of the power grid power supply unit, wherein the extra power of the power grid power supply unit is the difference between the maximum output power of the power grid power supply unit and the first required compensation power.

The maximum charging power of the energy storage battery is the maximum power which can be borne by the energy storage battery when the energy storage battery is charged. The maximum charging power of the energy storage battery may be set in advance on the energy storage battery management system or the computing device. The extra power of the grid power supply unit in this step is the power of the surplus power of the grid power supply unit after the grid power supply unit provides power to the power consumption unit access end in step 170. The maximum charging power of the energy storage battery and the extra power of the power grid power supply unit are obtained in sequence, and can be obtained simultaneously, or one of the maximum charging power and the extra power can be obtained first and then the other one of the maximum charging power and the extra power can be obtained.

Step 210: judging whether the extra power of the power grid power supply unit is greater than or equal to the maximum charging power or not;

if yes, go to step 220: and controlling the power grid power supply unit to charge the energy storage battery with the maximum charging power.

The power supply unit of the power grid charges the energy storage battery with the maximum charging power or the extra power of the power supply unit of the power grid, so that the energy storage battery can be rapidly charged to a preset electric quantity value, and the energy storage battery can be prevented from being damaged due to the fact that the charging power is larger than the acceptable maximum charging power. Therefore, when new forms of energy power supply unit and electric wire netting power supply unit appear providing electric power to the power consumption unit incoming end not enough, the energy storage battery can get into the power supply state fast in order to provide electric power to the power consumption unit incoming end, and can provide electric power for a long time.

If not, go to step 230: and controlling the power grid power supply unit to charge the energy storage battery with the extra power of the power grid power supply unit.

The electric power is supplied to the power utilization unit access end by controlling the new energy power supply unit with the maximum output power of the new energy power supply unit, the electric power of the new energy power supply unit can be used for supplying the electric power to the power utilization unit access end, the occupation ratio of new energy in a power supply system is improved, carbon emission is reduced, but the situation that the electric power is insufficient for the power utilization unit access end easily occurs in the new energy power supply unit, when the situation occurs, the electric power is supplied to the power utilization unit access end by controlling the electric network power supply unit with the first required compensation power, the sum of the first required compensation power of the electric network power supply unit and the maximum output power of the new energy power supply system is equal to the power of the electric power supplied to the power utilization unit access end by the power supply system, and therefore the electric network power supply unit and the new energy power supply unit provide stable and sufficient electric power for the power utilization unit access end together. And finally, judging whether the extra power of the power grid power supply unit is greater than or equal to the maximum charging power, if so, controlling the power grid power supply unit to charge the energy storage battery with the maximum charging power, otherwise, controlling the power grid power supply unit to charge the energy storage battery with the extra power of the power grid power supply unit, and under the condition of ensuring the charging safety of the energy storage battery, realizing the full utilization of the electric energy, wherein the energy storage battery can obtain the electric energy at the highest speed to provide a reliable basis for subsequent discharging, and simultaneously, the energy storage battery can be prevented from being damaged because the charging power is greater than the acceptable maximum charging power.

FIG. 2 is a flowchart illustrating the step 130 of FIG. 1 of the present invention after determining no. As shown in fig. 2, after determining whether the maximum output power of the new energy power supply unit is smaller than the output power of the power supply system in step 130, the method further includes:

if not, go to step 131: controlling the new energy power supply unit to supply power to the power utilization unit access end by the output power of the power supply system;

step 132: acquiring an SOC value of an energy storage battery;

step 133: judging whether the SOC value is smaller than a preset electric quantity value or not;

if yes, go to step 134: the method comprises the steps of obtaining the maximum charging power of an energy storage battery and the extra power of a new energy power supply unit, wherein the extra power of the new energy power supply unit is the difference value between the maximum output power of the new energy power supply unit and the output power of a power supply system.

The SOC value of the energy storage battery is smaller than a preset electric quantity value, and the new energy power supply unit can charge the energy storage battery.

Step 135: judging whether the extra power of the new energy power supply unit is greater than or equal to the maximum charging power;

if yes, go to step 136: and controlling the new energy power supply unit to charge the energy storage battery with the maximum charging power.

If not, go to step 137: and controlling the new energy power supply unit to charge the energy storage battery with the extra power of the new energy power supply unit.

When the maximum output power of the new energy power supply unit is judged to be greater than or equal to the output power of the power supply system, the new energy power supply unit is controlled to supply power to the power utilization unit access end and charge the energy storage battery, so that the whole power supply system is powered by new energy, the new energy is fully utilized, and the environmental pollution is reduced. Furthermore, the SOC value of the energy storage battery is judged to be less than 100%, and then the new energy power supply unit is controlled to charge the energy storage battery with the maximum charging power, so that the energy storage battery can be quickly charged to a preset electric quantity value, and the energy storage battery can be prevented from being damaged due to the fact that the charging power is greater than the acceptable maximum charging power. When the power supply system has insufficient power, the energy storage battery can quickly enter a power supply state to provide power for the power utilization unit access end.

FIG. 3 is a flowchart illustrating a step 160 of FIG. 1 when determining NO. The power supply system further includes a power generation unit. The power generation unit needs to consume fossil energy such as diesel oil for power generation, is not environment-friendly and has high cost, and therefore, the power generation unit is used as a standby power supply unit. In the case of insufficient power provided by the new energy power supply unit, power may be provided in the power supply system to the grid power supply unit and the power generation unit in an alternative manner depending on the specific situation. As shown in fig. 3, after determining whether the maximum output power of the grid power supply unit is greater than or equal to the first required compensation power in step 160, the method further includes:

if not, go to step 161: and acquiring the maximum output power of the power generation unit.

The maximum output power of the power generation unit may be the maximum power output by the power generation unit preset on the computing device or the power generation unit, or may be the maximum power that can be output by the power generation unit in real time. For the case that the maximum output power of the power generation unit is the real-time maximum output power of the power generation unit, the maximum output power of the power generation unit can be determined by detecting the voltage, the current and the power factor of the power generation unit and calculating based on the detected voltage, the current and the power factor.

Step 162: judging whether the maximum output power of the power generation unit is greater than or equal to the first required compensation power;

if yes, go to step 163: and controlling the power generation unit to provide power to the power utilization unit access end with the first required compensation power.

The sum of the maximum output power of the new energy power supply unit and the first required compensation power provided by the power generation unit is equal to the power of the power supply system for providing power for the power utilization unit access end.

The new energy power supply unit provides power for the power utilization unit by the maximum output power which can be provided, the power supply ratio of the new energy power supply unit in a power supply system can be improved, the carbon emission is reduced, in this case, by determining that the maximum output power of the grid power supply unit is smaller than the first required compensation power, that is, when the grid power supply unit is not enough to compensate the first required compensation power required to compensate the power consumption unit access end, the maximum output power of the power generation unit is obtained, and when the maximum output power of the power generation unit is judged to be greater than or equal to the first required compensation power, the power generation unit is controlled to provide power to the access end of the power utilization unit with the first required compensation power, the power supply sequence of the power generation unit is arranged at the end to reduce the environmental pollution to the maximum extent, the power generation unit and the new energy power supply unit provide power together, and the power supply system is guaranteed to provide stable power for the power utilization unit access end.

Fig. 4 shows a flow chart of the present invention after step 163 of fig. 3. After the power generating unit has provided power at the first required compensation power in step 163, the power generating unit still has excess power, and the energy storage battery can be used to provide power in the event that the power provided by the power supply system is insufficient, considering that the power generating unit is charging the energy storage battery. As shown in fig. 4, after controlling the power generation unit to provide power to the power-using unit access at the first desired compensatory power in step 163, the method further comprises:

step 164: acquiring an SOC value of an energy storage battery;

step 165: judging whether the SOC value is less than 100%;

if yes, go to step 166: acquiring the maximum charging power of the energy storage battery and the extra power of the power generation unit, wherein the extra power of the power generation unit is the difference value between the maximum output power of the power generation unit and the first required compensation power;

step 167: judging whether the extra power of the power generation unit is greater than or equal to the maximum charging power;

if yes, go to step 168: controlling the power generation unit to charge the energy storage battery with the maximum charging power;

if not, go to step 169: and controlling the power generation unit to charge the energy storage battery with the extra power of the power generation unit.

By judging that the SOC value is less than 100%, then obtaining the maximum charging power of the energy storage battery and the extra power of the power generation unit, wherein the extra power of the power generation unit is the difference value between the maximum output power of the power generation unit and the first required compensation power, and finally judging whether the extra power of the power generation unit is greater than or equal to the maximum charging power or not, the energy storage battery can be charged quickly, and the energy storage battery can be prevented from being damaged due to the fact that the charging power is greater than the acceptable maximum charging power. When the power supply system has insufficient power, the energy storage battery can quickly enter a power supply state to provide power for the power utilization unit access end.

FIG. 5 is a flowchart illustrating a negative determination at step 162 of FIG. 3 in accordance with the present invention. When the maximum output power of the power generation unit is less than the first required compensation power in step 162, in order for the power supply system to provide stable electricity, it is considered to control the power generation unit and the energy storage battery to provide the first required compensation power. As shown in fig. 5, after determining whether the maximum output power of the power generation unit is greater than or equal to the first required compensation power in step 162, the method further includes:

if not, go to step 1621: and controlling the power generation unit to provide power to the power utilization unit access end by the maximum output power of the power generation unit.

The sum of the maximum output power provided by the power generation unit and the maximum output power provided by the new energy power supply unit is equal to the power of the power supply system for supplying power to the power utilization unit access end. After this step, a compensating supply with energy storage batteries is considered.

Step 1622: acquiring an SOC value of an energy storage battery;

step 1623: and judging whether the SOC value is larger than a preset SOC threshold value.

The SOC threshold value is the lowest SOC value of the energy storage battery set for protecting the energy storage battery, and the influence of the emptying of the electric quantity of the energy storage battery on the cycle life is prevented. The SOC threshold may be set in advance on the energy storage battery or the computing device.

If yes, go to step 1624: and acquiring the maximum discharge power of the energy storage battery and second required compensation power, wherein the second required compensation power is the difference between the first required compensation power and the maximum output power of the power generation unit.

The maximum discharge power of the energy storage battery is the maximum discharge power of the energy storage battery set for protecting the energy storage battery. The maximum discharge power of the energy storage battery may be set in advance on the energy storage battery or the computing device.

Step 1625: judging whether the maximum discharge power is greater than or equal to the second required compensation power;

if yes, proceed to step 1626: and controlling the energy storage battery to provide power to the power utilization unit access end with the second required compensation power.

The sum of the maximum output power provided by the new energy power supply unit, the maximum output power provided by the power generation unit and the second required compensation power provided by the energy storage battery is equal to the power of the power supply system for providing power for the power utilization unit access end, and the new energy power supply unit, the power generation unit and the energy storage battery provide required power for the power utilization unit access end together.

If not, go to step 1627: and controlling the energy storage battery to supply power to the power utilization unit access end at the maximum discharge power.

The sum of the maximum output power provided by the new energy power supply unit, the maximum output power provided by the power generation unit and the maximum discharge power provided by the energy storage battery is equal to the power of the power supply system for supplying power to the power utilization unit access end. The power supply system supplies as much power as possible to the power consuming unit input.

The power supply of the new energy power supply unit is provided to the power utilization unit access end by the maximum output power which can be provided through controlling the new energy power supply unit, the power supply proportion of the new energy power supply unit in the power supply system is improved, the environmental pollution is reduced, then the maximum output power provided by controlling the power generation unit is used for providing power to the power utilization unit access end, the power supply proportion of the power generation unit in the power supply system is improved, sufficient power is provided to the power utilization unit access end as far as possible, and finally the power is provided to the power utilization unit access end through controlling the energy storage battery, so that the new energy power supply unit, the power generation unit and the energy storage battery provide sufficient power to the power utilization unit access end together. In addition, through judging that the maximum discharge power is greater than or equal to the second required compensation power, the energy storage battery is controlled to provide electric power to the power utilization unit access end with the second required compensation power, the part that the electric power of the power utilization unit access end is insufficient can be quickly compensated, namely the second required compensation power, so that the power utilization unit can be normally supplied with the electric power after the power utilization unit is accessed by the power utilization unit access end. The maximum discharge power is judged to be smaller than the second required compensation power, the energy storage battery is controlled to provide power to the power utilization unit access end through the maximum discharge power, the required power can be provided to the power utilization unit input end as far as possible, the energy storage battery can be prevented from being damaged due to the fact that the discharge power of the energy storage battery is too large, and the effect of protecting the energy storage battery is achieved.

FIG. 6 is a flowchart illustrating another embodiment of the present invention after the step 160 in FIG. 1 is judged no. When the maximum output power of the grid power supply unit is less than the first required compensation power in step 160, in order to provide stable electricity for the power supply system, the grid power supply unit and the energy storage battery are controlled to provide the first required compensation power. As shown in fig. 6, after determining whether the maximum output power of the grid power supply unit is greater than or equal to the first required compensation power in step 160, the method further includes:

if not, go to step 1601: and controlling the power grid power supply unit to supply power to the power utilization unit access end by the maximum output power of the power grid power supply unit.

The sum of the maximum output power provided by the power grid power supply unit and the maximum output power provided by the new energy power supply unit is equal to the power of the power supply system for supplying power to the power utilization unit access end.

Step 1602: acquiring an SOC value of an energy storage battery;

step 1603: judging whether the SOC value is larger than a preset SOC threshold value or not;

if yes, go to step 1604: acquiring the maximum discharge power of the energy storage battery and third required compensation power, wherein the third required compensation power is the difference between the first required compensation power and the maximum output power of a power grid power supply unit;

step 1605: judging whether the maximum discharge power is greater than or equal to a third required compensation power or not;

if yes, go to step 1606: and controlling the energy storage battery to provide power to the power utilization unit access end with third required compensation power.

The sum of the maximum output power provided by the new energy power supply unit, the maximum output power provided by the power grid power supply unit and the third required compensation power provided by the energy storage battery is equal to the power of the power supply system for supplying power to the power utilization unit access end.

If not, go to step 1607: and controlling the energy storage battery to supply power to the power utilization unit access end at the maximum discharge power.

The sum of the maximum output power provided by the new energy power supply unit, the maximum output power provided by the power grid power supply unit and the maximum discharge power provided by the energy storage battery is equal to the power of the power supply system for supplying power to the power utilization unit access end.

The method and the effect of controlling the new energy power supply unit, the power grid power supply unit and the energy storage battery to supply power to the power utilization unit access end are the same as those of controlling the new energy power supply unit, the power generation unit and the energy storage battery to supply power to the power utilization unit access end, and the power grid power supply unit is preferentially adopted to supply power, so that the pollution of the power generation unit to the environment during working can be reduced.

In an alternative embodiment, the obtaining the output power of the power supply system in step 110 includes:

and under the condition that the power utilization unit is not connected to the power utilization unit at the power utilization unit connecting end, acquiring the rated output power of the power supply system as the output power of the power supply system. And acquiring the required power of the electricity utilization unit as the output power of the power supply system under the condition that the electricity utilization unit is connected to the electricity utilization unit at the electricity utilization unit access end.

The rated output power of the power supply system can be preset on the computing device, for example, the rated output power of the power supply system is set to 100kW on the computing device. The required power of the power utilization unit is also the working power of the power utilization unit, and the required power of the power utilization unit can be acquired by detecting the receiving power of the power utilization unit after the power utilization unit is connected to the power utilization unit at the power utilization unit access end. The power required by different kinds of power utilization units is different.

By the method, the power supply system can respectively provide rated output power or required power of the power utilization unit to the power utilization unit access end according to the actual condition that the power utilization unit access end has no power utilization unit access, and the power supply system can adjust and provide the power according to the real-time required power of the power utilization unit under the condition that the power utilization unit access end is connected to the power utilization unit.

According to another aspect of the embodiment of the invention, a power supply control device is also provided. Fig. 7 shows a schematic structural diagram of a power supply control device according to an embodiment of the present invention. As shown in fig. 7, the power supply control device 300 includes: the first obtaining module 310, the second obtaining module 320, the first determining module 330, the first controlling module 340, the third obtaining module 350, the second determining module 360, the second controlling module 370, the fourth obtaining module 380, the third determining module 390, the fifth obtaining module 400, the fourth determining module 410, the third controlling module 420 and the fourth controlling module 430. The first obtaining module 310 is configured to obtain output power of a power supply system, where the power supply system includes a new energy power supply unit, a power grid power supply unit, an energy storage battery, and a power utilization unit access end. The second obtaining module 320 is configured to obtain the maximum output power of the new energy power supply unit. The first determining module 330 is configured to determine whether the maximum output power of the new energy power supply unit is smaller than the output power of the power supply system. The first control module 340 is configured to control the new energy power supply unit to provide power to the power consumption unit access end with the maximum output power of the new energy power supply unit when the maximum output power of the new energy power supply unit is smaller than the output power of the power supply system. The third obtaining module 350 is configured to obtain a maximum output power of the power grid power supply unit and a first required compensation power, where the first required compensation power is a difference between an output power of the power supply system and a maximum output power of the new energy power supply unit. The second determining module 360 is configured to determine whether the maximum output power of the grid power supply unit is greater than or equal to the first required compensation power. The second control module 370 is configured to control the grid power supply unit to provide power to the power consumption unit access terminal with the first required compensation power when the maximum output power of the grid power supply unit is greater than or equal to the first required compensation power. The fourth obtaining module 380 is configured to obtain a state of charge SOC value of the energy storage battery. The third determining module 390 is used for determining whether the SOC value is smaller than the preset electric quantity value. The fifth obtaining module 400 is configured to obtain the maximum charging power of the energy storage battery and the additional power of the grid power supply unit when the SOC value is less than 100%, where the additional power of the grid power supply unit is a difference between the maximum output power of the grid power supply unit and the first required compensation power. The fourth determining module 410 is used for determining whether the additional power of the grid power supply unit is greater than or equal to the maximum charging power. The third control module 420 is configured to control the grid power supply unit to charge the energy storage battery with the maximum charging power when the additional power of the grid power supply unit is greater than or equal to the maximum charging power. The fourth control module 430 is configured to control the grid power supply unit to charge the energy storage battery with the additional power of the grid power supply unit when the additional power of the grid power supply unit is smaller than the maximum charging power.

In the power supply control device provided by the application, the first control module 340 controls the new energy power supply unit to provide power to the power utilization unit access end by the maximum output power of the new energy power supply unit, so that the power of the new energy power supply unit is used for providing power to the power utilization unit access end, the occupation ratio of new energy in a power supply system is improved, carbon emission is reduced, the situation that the power provided by the new energy power supply unit to the power utilization unit access end is insufficient easily occurs, and the power of the insufficient power part is first required compensation power. And then the second control module 370 controls the grid power supply unit to provide power to the power utilization unit access end with the first required compensation power, so that the sum of the first required compensation power of the grid power supply unit and the maximum output power of the new energy power supply system is equal to the power of the power provided by the power supply system to the power utilization unit access end, and the grid power supply unit and the new energy power supply unit provide stable power to the power utilization unit access end together. Finally, whether the extra power of the power grid power supply unit is greater than or equal to the maximum charging power is judged through the fourth judgment module 410, if yes, the third control module 420 controls the power grid power supply unit to charge the energy storage battery with the maximum charging power, if not, the fourth control module 430 controls the power grid power supply unit to charge the energy storage battery with the extra power of the power grid power supply unit, so that the power grid power supply unit can provide stable electricity for the energy storage battery, the energy storage battery can be rapidly charged to a preset electric quantity value, damage to the energy storage battery due to the fact that the charging power is greater than the acceptable maximum charging power can be avoided, when the power supply system is insufficient, the energy storage battery can rapidly enter a power supply state to provide power for the power utilization unit access end, and the time for providing power is long.

In some embodiments, the power supply control device 300 further includes: the device comprises a fifth control module, a sixth acquisition module, a fifth judgment module, a seventh acquisition module, a sixth judgment module, a sixth control module and a seventh control module. The fifth control module is used for controlling the new energy power supply unit to supply power to the power utilization unit access end by the output power of the power supply system when the maximum output power of the new energy power supply unit is larger than or equal to the output power of the power supply system. The sixth acquisition module is used for acquiring the SOC value of the energy storage battery. The fifth judging module is used for judging whether the SOC value is smaller than the preset electric quantity value. The seventh obtaining module is used for obtaining the maximum charging power of the energy storage battery and the extra power of the new energy power supply unit when the SOC value is smaller than the preset electric quantity value, wherein the extra power of the new energy power supply unit is the difference value between the maximum output power of the new energy power supply unit and the output power of the power supply system. The sixth judging module is used for judging whether the extra power of the new energy power supply unit is larger than or equal to the maximum charging power. The sixth control module is used for controlling the new energy power supply unit to charge the energy storage battery with the maximum charging power when the additional power of the new energy power supply unit is greater than or equal to the maximum charging power. The seventh control module is used for controlling the new energy power supply unit to charge the energy storage battery with the extra power of the new energy power supply unit when the extra power of the new energy power supply unit is smaller than the maximum charging power.

In some embodiments, the power supply control device 300 further includes: the device comprises an eighth acquisition module, a seventh judgment module and an eighth control module. The eighth obtaining module is used for obtaining the maximum output power of the power generation unit when the maximum output power of the power grid power supply unit is smaller than the first required compensation power. The seventh judging module is used for judging whether the maximum output power of the power generation unit is larger than or equal to the first required compensation power. The eighth control module is used for controlling the power generation unit to provide power to the power utilization unit access end with the first required compensation power when the maximum output power of the power generation unit is greater than or equal to the first required compensation power.

In some embodiments, the power supply control device 300 further includes: the device comprises a ninth acquisition module, an eighth judgment module, a tenth acquisition module, a ninth judgment module, a ninth control module and a tenth control module. The ninth acquisition module is used for acquiring the SOC value of the energy storage battery. The eighth judging module is used for judging whether the SOC value is smaller than the preset electric quantity value. The tenth acquisition module is used for acquiring the maximum charging power of the energy storage battery and the extra power of the power generation unit when the SOC value is smaller than the preset electric quantity value, wherein the extra power of the power generation unit is the difference value between the maximum output power of the power generation unit and the first required compensation power; the ninth judging module is used for judging whether the extra power of the power generation unit is larger than or equal to the maximum charging power. The ninth control module is used for controlling the power generation unit to charge the energy storage battery with the maximum charging power when the additional power of the power generation unit is larger than or equal to the maximum charging power. The tenth control module is used for controlling the power generation unit to charge the energy storage battery with the extra power of the power generation unit when the extra power of the power generation unit is smaller than the maximum charging power.

In some embodiments, the power supply control device 300 further includes: the device comprises an eleventh control module, an eleventh acquisition module, a tenth judgment module, a twelfth acquisition module, an eleventh judgment module, a twelfth control module and a thirteenth control module. The eleventh control module is used for controlling the power generation unit to provide power to the power utilization unit access end by the maximum output power of the power generation unit when the maximum output power of the power generation unit is larger than or equal to the first required compensation power. The eleventh acquisition module is used for acquiring the SOC value of the energy storage battery. The tenth judging module is used for judging whether the SOC value is larger than a preset SOC threshold value. The twelfth obtaining module is configured to obtain a maximum discharging power of the energy storage battery and a second required compensation power, where the second required compensation power is a difference between the first required compensation power and a maximum output power of the power generation unit. The eleventh judging module is used for judging whether the maximum discharging power is larger than or equal to the second required compensation power. The twelfth control module is used for controlling the energy storage battery to provide power to the power utilization unit access end with the second required compensation power when the maximum discharge power is larger than or equal to the second required compensation power. The thirteenth control module is used for controlling the energy storage battery to provide power for the power utilization unit access end at the maximum discharge power when the maximum discharge power is smaller than the second required compensation power.

In some embodiments, the power supply control device 300 further includes: the device comprises a fourteenth control module, a thirteenth acquisition module, a twelfth judgment module, a fourteenth acquisition module, a thirteenth judgment module, a fifteenth control module and a sixteenth control module. The fourteenth control module is used for controlling the power grid power supply unit to supply power to the power utilization unit access end by using the maximum output power of the power grid power supply unit when the maximum output power of the power grid power supply unit is smaller than the first required compensation power. The thirteenth acquisition module is used for acquiring the SOC value of the energy storage battery. The twelfth judging module is used for judging whether the SOC value is larger than a preset SOC threshold value or not. The fourteenth obtaining module is configured to obtain a maximum discharging power and a third required compensation power of the energy storage battery when the SOC value is greater than a preset SOC threshold, where the third required compensation power is a difference between the first required compensation power and a maximum output power of the power grid power supply unit. The thirteenth judging module is used for judging whether the maximum discharging power is larger than or equal to the third required compensation power. The fifteenth control module is used for controlling the energy storage battery to provide power to the power utilization unit access end with the third required compensation power when the maximum discharge power is larger than or equal to the third required compensation power. The sixteenth control module is used for controlling the energy storage battery to provide power to the power utilization unit access end with the maximum discharge power when the maximum discharge power is smaller than the third required compensation power.

In an optional manner, the first obtaining module 310 is configured to obtain a rated output power of the power supply system as an output power of the power supply system under a condition that the power utilization unit is not connected to the power utilization unit at the power utilization unit connection end, and obtain a required power of the power utilization unit as the output power of the power supply system under a condition that the power utilization unit is connected to the power utilization unit at the power utilization unit connection end.

According to another aspect of the embodiment of the present invention, referring to fig. 8, fig. 8 is a schematic structural diagram of a controller in the power supply apparatus according to the embodiment of the present invention, and the specific embodiment of the present invention does not limit the specific implementation of the power supply apparatus.

As shown in fig. 8, the power supply apparatus includes a controller, and the controller may include: a processor (processor)502, a Communications Interface 504, a memory 506, and a communication bus 508.

Wherein: the processor 502, communication interface 504, and memory 506 communicate with one another via a communication bus 508. A communication interface 505 for communicating with network elements of other devices, such as clients or other servers. The processor 502 is configured to execute the program 510, and may specifically execute the relevant steps in the above embodiment of the power supply control method.

In particular, program 510 may include program code comprising computer-executable instructions.

The processor 502 may be a central processing unit CPU, or an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement an embodiment of the invention. The power supply device comprises one or more processors which can be the same type of processor, such as one or more CPUs; or may be different types of processors such as one or more CPUs and one or more ASICs.

And a memory 506 for storing a program 510. The memory 506 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

Specifically, the program 510 may be invoked by the processor 502 to cause the controller of the power supply device to perform the following operations:

acquiring output power of a power supply system, wherein the power supply system comprises a new energy power supply unit, a power grid power supply unit, an energy storage battery and a power utilization unit access end;

acquiring the maximum output power of a new energy power supply unit;

judging whether the maximum output power of the new energy power supply unit is smaller than the output power of the power supply system;

if so, controlling the new energy power supply unit to supply power to the power utilization unit access end by the maximum output power of the new energy power supply unit;

acquiring the maximum output power of a power grid power supply unit and first required compensation power, wherein the first required compensation power is the difference between the output power of a power supply system and the maximum output power of a new energy power supply unit;

judging whether the maximum output power of the power grid power supply unit is greater than or equal to the first required compensation power or not;

if so, controlling the power grid power supply unit to supply power to the power utilization unit access end by first required compensation power;

acquiring a state of charge (SOC) value of an energy storage battery;

judging whether the SOC value is smaller than a preset electric quantity value or not;

if so, acquiring the maximum charging power of the energy storage battery and the extra power of the power grid power supply unit, wherein the extra power of the power grid power supply unit is the difference between the maximum output power of the power grid power supply unit and the first required compensation power;

judging whether the extra power of the power grid power supply unit is greater than or equal to the maximum charging power;

if so, controlling the power supply unit of the power grid to charge the energy storage battery with the maximum charging power;

and if not, controlling the power grid power supply unit to charge the energy storage battery with the extra power of the power grid power supply unit.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a power supply device according to an embodiment of the present invention. In an optional manner, the power supply device further includes a new energy power supply unit 511, a grid power supply unit 512, an energy storage battery 513 and a power utilization unit access terminal 514, and the new energy power supply unit 511, the grid power supply unit 512, the energy storage battery 513 and the power utilization unit access terminal 514 are all electrically connected to the controller 515.

The output end of the new energy power supply unit 511 is electrically connected to the input end of the first dc/dc conversion unit 516, the output end of the energy storage battery 513 is electrically connected to the input end of the second dc/dc conversion unit 517, the output end of the first dc/dc conversion unit 516 is electrically connected to the input end of the inverter unit 518 through the dc bus 524, and the output end of the second dc/dc conversion unit 517 is electrically connected to the input end of the inverter unit 518 through the dc bus 524. The first dc/dc conversion unit 516 and the second dc/dc conversion unit 517 are respectively configured to perform switching and current transformation control on the new energy power supply unit 511 and the energy storage battery 513, convert the energy storage battery 513 and the new energy power supply unit 511 into a voltage required by the dc bus 524, and control the output power not to exceed the rated power capacity of the dc bus. The output end of the grid power supply unit 512 may be electrically connected to the input end of the first rectifying unit 519, and the output end of the first rectifying unit 519 may be electrically connected to the input end of the inverting unit 518 through the dc bus 524. The output of the inverter unit 518 is electrically connected to the input of the power consuming unit input 514.

In addition, with continued reference to fig. 9, the power supply system may further include a power generation unit 520. The output ends of the power generation unit 520 and the grid power supply unit 512 can be electrically connected to two input ends of an Automatic Transfer Switch 521 (ATS), respectively, the output end of the Automatic Transfer Switch 521 is electrically connected to the input end of a first rectification unit 519, the output end of the first rectification unit 519 is electrically connected to the input end of an inversion unit 518, and the output end of the inversion unit 518 is electrically connected to a power utilization unit access end 514. The automatic transfer switching device 521 is used for starting the power generation unit 520 and switching to the power generation unit 520 to supply power when the power grid supply unit 512 fails.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a power supply device according to another embodiment of the present invention. The power generation unit 520 may also be electrically connected to an input terminal of the second rectification unit 522, an output terminal of the power grid supply unit 512 is electrically connected to an input terminal of the third rectification unit 523, the second rectification unit 522 and the third rectification unit 523 are electrically connected to an input terminal of the inverter unit 518 through the dc bus 524 after being connected in parallel, and switching and current transformation control of the power grid supply unit 512 and the power generation unit 520 are respectively realized through the two rectification units. When the power supply unit 512 fails, the controller starts the power generation unit 520, turns off the third rectification unit 523, and turns on the second rectification unit 522, thereby implementing the same automatic switching function as the automatic transfer switching apparatus 521 of fig. 9.

The algorithms or displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. In addition, embodiments of the present invention are not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the invention and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed to reflect the intent: that the invention as claimed requires more features than are expressly recited in each claim.

Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specified otherwise.

Claims

1. A power supply control method, comprising:

acquiring the maximum output power of the new energy power supply unit;

acquiring the maximum output power of the power grid power supply unit and first required compensation power, wherein the first required compensation power is a difference value between the output power of the power supply system and the maximum output power of the new energy power supply unit;

if so, controlling the power grid power supply unit to provide power to the power utilization unit access end by the first required compensation power;

acquiring a state of charge (SOC) value of the energy storage battery;

if so, controlling the power grid power supply unit to charge the energy storage battery with the maximum charging power;

2. The power supply control method according to claim 1, wherein after determining whether the maximum output power of the new energy power supply unit is smaller than the output power of the power supply system, the method further comprises:

if not, controlling the new energy power supply unit to supply power to the power utilization unit access end by the output power of the power supply system;

acquiring the SOC value of the energy storage battery;

judging whether the SOC value is smaller than the preset electric quantity value or not;

if so, acquiring the maximum charging power of the energy storage battery and the extra power of the new energy power supply unit, wherein the extra power of the new energy power supply unit is a difference value between the maximum output power of the new energy power supply unit and the output power of the power supply system;

judging whether the extra power of the new energy power supply unit is greater than or equal to the maximum charging power;

if so, controlling the new energy power supply unit to charge the energy storage battery with the maximum charging power;

and if not, controlling the new energy power supply unit to charge the energy storage battery with the extra power of the new energy power supply unit.

3. The power supply control method according to claim 1, characterized in that the power supply system further includes a power generation unit;

after determining whether the maximum output power of the grid power supply unit is greater than or equal to the first required compensation power, the method further includes:

if not, acquiring the maximum output power of the power generation unit;

judging whether the maximum output power of the power generation unit is greater than or equal to the first required compensation power or not;

and if so, controlling the power generation unit to provide power to the power utilization unit access end by the first required compensation power.

4. The power supply control method according to claim 3, wherein if the first required compensatory power is lower than the first required compensatory power, the method further comprises:

acquiring the SOC value of the energy storage battery;

if so, acquiring the maximum charging power of the energy storage battery and the extra power of the power generation unit, wherein the extra power of the power generation unit is the difference value between the maximum output power of the power generation unit and the first required compensation power;

judging whether the extra power of the power generation unit is greater than or equal to the maximum charging power;

if so, controlling the power generation unit to charge the energy storage battery with the maximum charging power;

and if not, controlling the power generation unit to charge the energy storage battery with the extra power of the power generation unit.

5. The power supply control method according to claim 3, wherein after determining whether the maximum output power of the power generation unit is greater than or equal to the first required compensation power, the method further comprises:

if not, controlling the power generation unit to provide power to the power utilization unit access end by the maximum output power of the power generation unit;

acquiring the SOC value of the energy storage battery;

judging whether the SOC value is larger than a preset SOC threshold value or not;

if so, acquiring the maximum discharge power of the energy storage battery and a second required compensation power, wherein the second required compensation power is a difference value between the first required compensation power and the maximum output power of the power generation unit;

judging whether the maximum discharge power is greater than or equal to the second required compensation power;

if so, controlling the energy storage battery to provide electric power to the power utilization unit access end by second required compensation power;

and if not, controlling the energy storage battery to provide power to the power utilization unit access end by the maximum discharge power.

6. The power supply control method according to claim 1, wherein after determining whether the maximum output power of the grid power supply unit is greater than or equal to the first required compensation power, the method further comprises:

if not, controlling the power grid power supply unit to supply power to the power utilization unit access end by the maximum output power of the power grid power supply unit;

acquiring the SOC value of the energy storage battery;

if so, acquiring the maximum discharge power of the energy storage battery and third required compensation power, wherein the third required compensation power is the difference between the first required compensation power and the maximum output power of the power grid power supply unit;

judging whether the maximum discharge power is greater than or equal to the third required compensation power;

if so, controlling the energy storage battery to provide power to the power utilization unit access end by the third required compensation power;

and if not, controlling the energy storage battery to provide power for the power utilization unit access end by the maximum discharge power.

7. The power supply control method according to any one of claims 1 to 6, wherein the obtaining of the output power of the power supply system includes:

under the condition that the power utilization unit is not connected to the power utilization unit at the power utilization unit connecting end, acquiring rated output power of the power supply system as output power of the power supply system;

and under the condition that the power utilization unit access end is connected with the power utilization unit, acquiring the required power of the power utilization unit as the output power of the power supply system.

8. A power supply control device characterized by comprising:

the power supply system comprises a first acquisition module, a second acquisition module and a power supply module, wherein the first acquisition module is used for acquiring the output power of the power supply system, and the power supply system comprises a new energy power supply unit, a power grid power supply unit, an energy storage battery and a power utilization unit access end;

the second acquisition module is used for acquiring the maximum output power of the new energy power supply unit;

the first judgment module is used for judging whether the maximum output power of the new energy power supply unit is smaller than the output power of the power supply system;

the first control module is used for controlling the new energy power supply unit to supply power to the power utilization unit access end by the maximum output power of the new energy power supply unit when the maximum output power of the new energy power supply unit is smaller than the output power of the power supply system;

the third obtaining module is used for obtaining the maximum output power of the power grid power supply unit and first required compensation power, wherein the first required compensation power is a difference value between the output power of the power supply system and the maximum output power of the new energy power supply unit;

the second judgment module is used for judging whether the maximum output power of the power grid power supply unit is greater than or equal to the first required compensation power;

the second control module is used for controlling the power grid power supply unit to supply power to the power utilization unit access end at the first required compensation power when the maximum output power of the power grid power supply unit is greater than or equal to the first required compensation power;

the fourth acquisition module is used for acquiring the SOC value of the energy storage battery;

the third judging module is used for judging whether the SOC value is smaller than a preset electric quantity value or not;

a fifth obtaining module, configured to obtain a maximum charging power of the energy storage battery and an extra power of the power grid power supply unit when the SOC value is smaller than the preset electric quantity value, where the extra power of the power grid power supply unit is a difference between a maximum output power of the power grid power supply unit and the first required compensation power;

the fourth judging module is used for judging whether the extra power of the power grid power supply unit is greater than or equal to the maximum charging power;

the third control module is used for controlling the power grid power supply unit to charge the energy storage battery with the maximum charging power when the additional power of the power grid power supply unit is greater than or equal to the maximum charging power;

and the fourth control module is used for controlling the power grid power supply unit to charge the energy storage battery with the extra power of the power grid power supply unit when the extra power of the power grid power supply unit is smaller than the maximum charging power.

9. A power supply apparatus, comprising a controller, the controller comprising: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;

the memory is configured to store at least one executable instruction that causes the processor to perform the operations of the power supply control method according to any one of claims 1 to 7.

10. The power supply device according to claim 9, further comprising a new energy power supply unit, a grid power supply unit, an energy storage battery, and a power consumption unit access terminal, wherein the new energy power supply unit, the grid power supply unit, the energy storage battery, and the power consumption unit access terminal are all electrically connected to the controller.