CN117937633B

CN117937633B - Power supply system scheduling method, power supply system scheduling device and communication station

Info

Publication number: CN117937633B
Application number: CN202410323616.6A
Authority: CN
Inventors: 杨国良; 张艳珍; 李智; 成艳春
Original assignee: Beijing Taiyue Tiancheng Technology Co ltd
Current assignee: Beijing Taiyue Tiancheng Technology Co ltd
Priority date: 2024-03-21
Filing date: 2024-03-21
Publication date: 2024-05-31
Anticipated expiration: 2044-03-21
Also published as: CN117937633A

Abstract

The application belongs to the technical field of intelligent power supply scheduling, and provides a power supply system scheduling method, a power supply system scheduling device and a communication station. The power supply system scheduling method comprises the following steps: determining a first remaining charging time based on the remaining to-be-charged amount and a first preset charging voltage; determining a first power generation amount of normal power generation of the photovoltaic power supply equipment and a second power generation amount of abnormal power generation of the photovoltaic power supply equipment based on the first residual charging time and the power generation power of the current photovoltaic power supply equipment; determining a first economic benefit of electricity usage in the event that the charging voltage is boosted to a first preset charging voltage to charge the energy storage device; determining a second economic benefit of charging the energy storage device with the first preset voltage threshold; based on the magnitude relationship of the first economic benefit and the second economic benefit, it is determined whether to raise the charging voltage from a first preset voltage threshold to a first preset charging voltage to charge the energy storage device. The photovoltaic power generation efficiency is improved, so that the power grid pressure is reduced, and energy conservation and emission reduction are realized.

Description

Power supply system scheduling method, power supply system scheduling device and communication station

Technical Field

The application relates to the technical field of intelligent power supply scheduling, in particular to a power supply system scheduling method, a power supply system scheduling device and a communication station.

Background

Intelligent scheduling is an important component of smart power grids. Along with the rapid development of technologies such as photovoltaic and energy storage, the photovoltaic and the energy storage become important components of a novel power system, the supply side and the demand side are changed from unidirectional support to bidirectional interaction, and the source follow-up to source network and charge storage integration are changed. The traditional mobile communication station mainly adopts a mode of combining mains supply and non-cyclic storage battery standby power. However, this approach cannot cope economically and effectively with changes in the external power supply environment and is difficult to contribute to grid load pressure.

For this reason, in the related art, a distributed direct current photovoltaic system is built on the roof of an outdoor communication site, and photovoltaic power generation is adopted to reduce the pressure of a power grid; on the other hand, a user side energy storage system is built, the traditional lead-acid storage battery is replaced by an energy storage battery such as lithium iron, lead carbon and the like, an integral storage mode is adopted, energy storage peak clipping and valley filling operation is realized on the basis of ensuring the standby safety, and the dispatching pressure of a power grid is reduced.

However, when the energy storage charging and the photovoltaic power generation in the related technology are performed simultaneously, voltage conflict can be generated, so that the power of the photovoltaic power generation is affected, and the energy conservation and emission reduction are not facilitated.

Disclosure of Invention

The embodiment of the application provides a power supply system dispatching method, a power supply system dispatching device and a communication station, which can avoid collision between energy storage charging and photovoltaic power generation, maximize the utilization of the photovoltaic power generation and improve the photovoltaic power generation efficiency, thereby improving the utilization rate of illumination resources, relieving the pressure of a power grid and realizing energy conservation and emission reduction compared with the prior art.

According to a first aspect of an embodiment of the present application, there is provided a power supply system scheduling method, the method being applied to a power supply system of a communication site, the power supply system including a photovoltaic power supply device, a utility power supply device, an energy storage device, and a dc load, the photovoltaic power supply device and the utility power supply device being electrically connected to the dc load through a dc bus, the photovoltaic power supply device, the utility power supply device, and the dc load being electrically connected to the energy storage device through a dc bus; the method comprises the following steps:

under the condition that the commercial power supply equipment charges the energy storage equipment, judging whether the charging voltage of the commercial power supply equipment to the energy storage equipment conflicts with the maximum output voltage of the photovoltaic power supply equipment;

If the judgment result is conflict, determining a first residual charging time based on the residual to-be-charged amount and a first preset charging voltage;

determining a first power generation amount of normal power generation of the photovoltaic power supply equipment and a second power generation amount of abnormal power generation of the photovoltaic power supply equipment based on the first residual charging time and the power generation power of the current photovoltaic power supply equipment;

Determining a first economic benefit of electricity consumption under the condition that the charging voltage is boosted to a first preset charging voltage to charge the energy storage device based on the remaining to-be-charged amount, the energy storage charging and discharging efficiency, the peak Gu Dianfei price difference, the second generated energy and the valley-time electricity price;

determining a second economic benefit of charging the energy storage device with a first preset voltage threshold based on the first power generation amount, the off-peak power price, the first charge amount, the energy storage charging and discharging efficiency and the peak-off power charge price difference; the first charging electric quantity is the charging electric quantity for charging the energy storage equipment for a first residual charging time by a first preset voltage threshold value;

Based on the magnitude relationship of the first economic benefit and the second economic benefit, it is determined whether to raise the charging voltage from a first preset voltage threshold to a first preset charging voltage to charge the energy storage device.

In an alternative implementation, the electrical system scheduling method further comprises:

Under the condition that the charging voltage of the commercial power supply equipment to the energy storage equipment is larger than a first preset voltage threshold value, determining that the judging result is conflict; the first preset voltage threshold is smaller than a maximum output voltage value first threshold of the photovoltaic power supply equipment.

In an alternative implementation, determining whether to charge the energy storage device from the first preset voltage threshold to the first preset charging voltage based on the magnitude relationship of the first economic benefit and the second economic benefit includes:

under the condition that the first economic benefit is greater than the second economic benefit, raising the charging voltage to a first preset charging voltage to charge the energy storage device;

And under the condition that the first economic benefit is smaller than the second economic benefit, maintaining a first preset voltage threshold value to charge the energy storage device.

In an alternative implementation, before determining the first remaining charging time, the method further comprises:

Under the condition that the charging voltage of the commercial power supply equipment to the energy storage equipment is larger than a first preset voltage threshold value, determining second residual charging time from the current moment to the preset charging ending moment;

Based on historical charge and discharge data, determining a third residual charge time required from the current moment to the completion of charging, wherein the energy storage equipment is charged by a first preset voltage threshold value;

Determining a second charge amount for charging the energy storage device at the first preset voltage threshold based on a minimum value of the second remaining charge time and the third remaining charge time, and the first preset voltage threshold;

and under the condition that the difference value between the second charging electric quantity and the residual to-be-charged quantity is within a first preset electric quantity threshold value range, charging the energy storage equipment by using a first preset voltage threshold value.

In an alternative implementation, determining a third remaining charging time required to charge the energy storage device at the first preset voltage threshold from the current time to completion of charging based on the historical charging and discharging data includes:

based on historical charge and discharge data, determining a corresponding relationship between charging current and charging time when the energy storage device is charged by a first preset voltage threshold;

and determining a third residual charging time required from the current moment to the completion of charging based on the corresponding relation between the charging current and the charging time.

In an optional implementation manner, in a case where the charging voltage of the energy storage device by the mains supply apparatus is greater than the first preset voltage threshold, based on the remaining to-be-charged amount and the first preset charging voltage, before the step of determining the first remaining charging time, the method further includes:

In a first preset charging time period, a charging cycle is executed until the remaining to-be-charged amount is zero, or until the charging voltage of the energy storage device by the commercial power supply equipment is greater than a first preset voltage threshold; the charging cycle includes:

Determining the current remaining to-be-charged amount and the current moment;

Determining a current charging voltage based on the current total voltage of the energy storage device, the target charging current and the wiring resistance from the energy storage device to the direct current bus under the condition that the current remaining to-be-charged amount is larger than zero and the current moment does not reach the preset charging end moment;

Judging the magnitude of the current charging voltage and a first preset voltage threshold value;

and waiting for a preset time length under the condition that the current charging voltage is smaller than a first preset voltage threshold value, and determining the current remaining waiting charge amount at the next moment after the preset time length.

In an alternative implementation, before the charging cycle is performed during the first preset charging period, the method further includes:

Acquiring weather forecast data corresponding to the power supply system in a first preset power utilization time period, and acquiring historical data of the power supply system in a second preset power utilization time period; the second preset electricity utilization period comprises a first preset electricity utilization period;

Determining a third power generation amount of the photovoltaic power supply equipment in a first preset power utilization time period based on weather prediction data;

Determining the power consumption of the direct current load in a second preset power consumption time period based on the historical data;

acquiring the current residual electric quantity of the energy storage equipment;

determining the current remaining to-be-charged amount and the current moment comprises the following steps:

and determining the current remaining to-be-charged amount based on the power consumption of the direct current load, the third power generation amount and the current remaining power.

In an alternative implementation, the current remaining to-be-charged amount is determined based on the power consumption of the direct current load, the third power generation amount and the current remaining power; comprising the following steps:

determining the total remaining power to be charged based on the power consumption of the direct current load, the third power generation amount and the current remaining power;

And determining the current remaining to-be-charged amount based on the remaining to-be-charged total amount and the charged amount.

According to a second aspect of the embodiment of the present application, there is provided a power supply system scheduling apparatus, where a power supply system includes a photovoltaic power supply device, a utility power supply device, an energy storage device, and a dc load, where the photovoltaic power supply device and the utility power supply device are electrically connected to the dc load through a dc bus, and where the photovoltaic power supply device, the utility power supply device, and the dc load are electrically connected to the energy storage device through a dc bus; the device comprises:

The judging module is used for judging whether the charging voltage of the energy storage device by the commercial power supply device conflicts with the maximum output voltage of the photovoltaic power supply device under the condition that the energy storage device is charged by the commercial power supply device;

The determining module is used for determining a first residual charging time based on the residual to-be-charged amount and a first preset charging voltage under the condition that the judgment result is conflict;

the determining module is further used for determining a first power generation amount of normal power generation of the photovoltaic power supply equipment and a second power generation amount of abnormal power generation of the photovoltaic power supply equipment based on the first residual charging time and the power generation power of the current photovoltaic power supply equipment;

the determining module is further configured to determine a first economic benefit of electricity consumption under the condition that the charging voltage is boosted to a first preset charging voltage to charge the energy storage device based on the remaining to-be-charged amount, the energy storage charging and discharging efficiency, the peak Gu Dianfei price difference, the second generated energy and the valley-time electricity price;

the determining module is further used for determining second economic benefits of charging the energy storage device by the first preset voltage threshold value based on the first power generation amount, the valley-time power price, the first charging power amount, the energy storage charging and discharging efficiency and the peak-valley power cost price difference; the first charging electric quantity is the charging electric quantity for charging the energy storage equipment for a first residual charging time by a first preset voltage threshold value;

the determining module is further configured to determine whether to raise the charging voltage from a first preset voltage threshold to a first preset charging voltage to charge the energy storage device based on a magnitude relationship between the first economic benefit and the second economic benefit.

In an optional implementation manner, the determining module is further configured to determine that the determination result is a conflict when a charging voltage of the energy storage device by the mains supply power supply device is greater than a first preset voltage threshold; the first preset voltage threshold is smaller than a maximum output voltage value first threshold of the photovoltaic power supply equipment.

In an alternative implementation, the determining module includes:

the first sub-determining unit is used for raising the charging voltage to a first preset charging voltage to charge the energy storage device under the condition that the first economic benefit is greater than the second economic benefit;

And the second sub-determining unit is used for maintaining to charge the energy storage device with the first preset voltage threshold value under the condition that the first economic benefit is smaller than the second economic benefit.

According to a third aspect of the embodiment of the present application, there is provided a communication station, including a processor, a storage, and a computer program stored on the storage and executable on the processor, the computer program, when executed by the processor, implementing the power supply system scheduling method provided by any one of the alternative implementations of the first aspect of the embodiment of the present application.

According to the power supply system scheduling method, the power supply system scheduling device and the communication station provided by the embodiment of the application, when the energy storage equipment is charged by the mains supply equipment, whether the charging voltage of the energy storage equipment by the mains supply equipment and the maximum output voltage of the photovoltaic power supply equipment conflict or not is judged, and when the judgment result is conflict, the first residual charging time is determined based on the residual to-be-charged amount and the first preset charging voltage; then, based on the first remaining charging time and the generated power of the current photovoltaic power supply equipment, determining a first generated power of the photovoltaic power supply equipment under the condition of normal power generation and a second generated power of the photovoltaic power supply equipment for abnormal power generation (for example, under the condition that the charging voltage of the commercial power supply equipment is larger than a first preset voltage threshold value); finally, determining first economic benefits of charging the energy storage device by the mains supply power supply device when the charging voltage of the mains supply power supply device is raised to a first preset charging voltage based on the remaining to-be-charged amount, the energy storage charging and discharging efficiency, peak Gu Dianfei price difference, second generated energy and valley-time electricity price, wherein the first economic benefits are the economic benefits of charging the energy storage device by the mains supply power supply device so as to meet the discharge requirement of the energy storage device on the direct current load in the electricity utilization peak period; determining a second economic benefit of charging the energy storage device with a first preset voltage threshold based on the first power generation amount, the off-peak power price, the first charge amount, the energy storage charging and discharging efficiency and the peak-off power price difference; the first charging electric quantity is the charging electric quantity for charging the energy storage device for a first residual charging time by using a first preset voltage threshold value, namely, under the condition that the second economic benefit is the power generation efficiency of the photovoltaic power supply device, the energy storage device is charged by using the charging voltage of the first preset voltage threshold value so as to meet the economic benefit that the energy storage device discharges the direct current load when using electricity Gao Fengqi; and then, the charging voltage of the energy storage device by lifting the commercial power supply equipment can be determined through the first economic benefit and the second economic benefit, or the charging voltage of the energy storage device by maintaining the commercial power supply equipment to be a first preset voltage threshold value by ensuring the photovoltaic power generation efficiency. Therefore, compared with the related art, the device with higher economic benefit in the photovoltaic power supply device and the commercial power supply device can be fully utilized to supply power to the direct current load, so that when the commercial power supply device has poorer economic benefit, the photovoltaic power supply device can be fully utilized to supply power to the direct current load, the power grid pressure can be relieved, the utilization rate of illumination is improved, and compared with the prior art, the energy saving and emission reduction effect is finally realized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

FIG. 1 is a system architecture diagram of a power supply system schedule provided by an embodiment of the present application;

FIG. 2 is a flowchart of an implementation of a power supply system scheduling method provided by an embodiment of the present application;

FIG. 3 is a graph showing the power consumption peak and the power consumption valley time in the power supply system scheduling method according to the embodiment of the application;

FIG. 4 is a flowchart of another implementation of a power supply system scheduling method according to an embodiment of the present application;

FIG. 5 is a flowchart of still another implementation of a power supply system scheduling method according to an embodiment of the present application;

FIG. 6 is a flowchart of still another implementation of a power supply system scheduling method according to an embodiment of the present application;

Fig. 7 is a block diagram of a power supply system scheduling device according to an embodiment of the present application;

Fig. 8 is a block diagram of a communication station according to an embodiment of the present application.

Detailed Description

In order to make the technical solution of the present application better understood by those skilled in the art, the technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than as described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "upper," "lower," "horizontal," "bottom," "inner," "outer," and the like indicate an orientation or a positional relationship, if any, based on that shown in the drawings, merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium.

In the present application, unless explicitly specified and limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. However, it is noted that a direct connection indicates that two bodies connected together do not form a connection relationship by an excessive structure, but are connected to form a whole by a connection structure. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

The description as it relates to "first", "second", etc. in the present application is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

At present, with technological progress and development, in the power consumption peak season, the power consumption supply and demand contradiction of the whole society is continuously aggravated, the peak load of the power grid is high, and the peak-valley difference is enlarged year by year. On the other hand, the development of technologies such as photovoltaic and energy storage is rapid, and the technology becomes an important component of the construction of a novel power system, and the supply side and the demand side are changed from unidirectional support to bidirectional interaction, and from 'source follow-up' to 'source network and charge storage integration'.

In some related technologies, a power supply mode of a commercial power supply and a non-circulating storage battery are mainly adopted in a communication site of mobile communication, so that changes of an external power supply environment cannot be economically and effectively coped with, and contribution to resolving load pressure of a power grid is difficult.

For this reason, in the related art, photovoltaic power generation is adopted to relieve the pressure of a power grid for a conditional outdoor communication station by utilizing a roof self-built distributed direct current photovoltaic system thereof; in addition, a user side energy storage system is built, an iron lithium energy storage battery, a lead carbon energy storage battery and the like are used for replacing a lead acid storage battery, an integral storage mode is adopted, energy storage peak clipping and valley filling operation is realized on the basis of ensuring the standby safety, the power grid pressure is reduced, and peak valley load balance is eliminated.

In practical application, however, the distributed photovoltaic system and the energy storage system are deployed at the same time at one communication site, and the distributed photovoltaic system and the energy storage system are directly interposed in parallel on the same switching power bus (may also be referred to as a dc bus in some examples) to provide services for a dc load. When the utility power supply equipment charges the energy storage system and the photovoltaic power generation is performed simultaneously, the charging voltage of the utility power supply system to the energy storage system and the output voltage of the photovoltaic power generation can collide, so that the power of the photovoltaic power generation is influenced, and the energy conservation and the emission reduction are not facilitated.

Fig. 1 is a system architecture diagram of power supply system scheduling provided by an embodiment of the present application, fig. 2 is a flowchart for implementing a power supply system scheduling method provided by an embodiment of the present application, and fig. 3 is a graph for dividing a power consumption peak and a power consumption valley in a power supply system scheduling method provided by an embodiment of the present application.

Referring to fig. 1 and fig. 2, the power supply system scheduling method provided by the embodiment of the present application is applied to a power supply system of a communication station, where the power supply system includes: photovoltaic power supply equipment, commercial power supply equipment, energy storage equipment and direct current load.

In some examples, the photovoltaic power supply device may be a photovoltaic system disposed on a roof of the outdoor station, and the photovoltaic power supply device may be electrically connected to the dc load through a dc bus; it will be appreciated that the dc load may be a consumer of the communication station; that is, the power generated by the photovoltaic power supply device under illumination can be directly supplied to the direct current load for use.

In some examples of embodiments of the present application, the mains supply apparatus may be electrically connected to the dc bus via a switching power supply, and it may be appreciated that the dc bus may be electrically connected to the dc load, so that the mains supply apparatus (e.g. the power grid) may be electrically connected to the dc load via the dc bus, for example, when the power is used in a valley, the power load is small, the electricity price in the valley is relatively cheap, and the dc load may be powered by the mains supply apparatus.

In addition, referring to fig. 1, in the embodiment of the present application, the photovoltaic power supply device is further electrically connected to the energy storage device through a dc bus, where the energy storage device may be the energy storage system described in the foregoing embodiment of the present application, for example, an energy storage battery such as lithium iron, lead carbon, and the like. The commercial power supply equipment is also electrically connected with the energy storage equipment through the direct current bus, so that the energy storage equipment can be charged through commercial power supply during electricity utilization valley, and the energy storage equipment can discharge to a direct current load during electricity utilization peak or peak time, so that the power grid pressure during the electricity utilization peak or peak time is relieved, in addition, the economic benefit can be improved by using the peak-valley electricity price difference, and the waste of electric energy during the valley is reduced; thus, in some embodiments of the present application, the energy storage device is also electrically connected to the dc load via the dc bus.

Referring to fig. 3 for an example, in some embodiments of the present application, a certain provincial electricity price peak-valley division is taken as an example, a certain provincial time-of-use electricity price curve is two peaks and two valleys, and the provincial energy storage system scheduling policy is two charges and two discharges: i.e., between a first charge at a first valley (which may be 22:00-08:00 in some examples) and a second charge at a second valley (which may be 11:00-13:00 in some examples); the first discharge is performed between the first peaks (which may be 08:00-11:00 in some examples), and the second discharge is performed between the second peaks (which may be 13:00-22:00 in some examples).

It is understood that the photovoltaic powered device can generate electricity by sunlight irradiation between periods of time (which may be 06:00-18:00 in some examples) where sunlight is sufficient throughout the day; it will also be appreciated that in some examples, to ensure that the photovoltaic power system generation power is at a normal level; the output voltage of the photovoltaic power supply equipment needs to be higher than a first threshold value of the voltage on the direct current bus (namely, the direct current output voltage of the switching power supply); illustratively, the first threshold may be 0.5V. Of course, in some examples, the first threshold may also be greater than 0.5V, such as may be 0.55V, 0.6V, or 0.65V, or the like.

It can be appreciated that in some application scenarios, the second valley (11:00-13:00 in some examples) is fully illuminated, the generated power of the photovoltaic power supply device is higher, but referring to fig. 3, 11:00-13:00 is also the time when the mains power supply device charges the energy storage device for the second time, during which, in the related art, the switch power supply floating charge voltage set value is fixedly set to a first preset charging voltage (in some examples, the first preset charging voltage may be 56.4V), and the dc output voltage is raised to form a significant differential pressure for the energy storage device to charge the energy storage battery; after ending at the second valley, the dc output voltage drops to a holding voltage (which may be 53.5V in some examples) or to a discharge voltage (which may be 51.5V in some examples).

In general, in order to ensure the electricity safety of a communication station, the direct-current photovoltaic power supply equipment is prohibited from continuously raising the output voltage so as to maintain the output voltage generated by the photovoltaic power supply equipment; therefore, when the dc output voltage of the switching power supply (i.e., the charging voltage of the mains power supply device for charging the energy storage device) rises to a certain voltage threshold (in some examples, may be greater than or equal to 55.5V), the photovoltaic power supply device cannot continuously raise the output voltage, so that the photovoltaic power supply system is inhibited by the dc output voltage of the power supply, the generated power of the photovoltaic power supply device is rapidly reduced to 0% -20% of the normal generated power, and the dc power output voltage on the dc bus is reduced after the end of charging in the second valley, and the generated power of the photovoltaic power supply device is rapidly returned to the normal generated power.

That is, in a period of time when the illumination condition is good, there may be a conflict between the power generation output voltage of the photovoltaic power supply device and the charging voltage of the mains power supply device for charging the energy storage device, which easily causes the waste of the photovoltaic power supply device and causes the waste of illumination resources.

In some examples, the DC/DC converter may adjust the voltage from the energy storage device or the photovoltaic power supply device to the DC bus, so as to solve the problem that there is a conflict between the charging voltage of the commercial power supply device for charging the energy storage device and the power generation output voltage of the photovoltaic power supply device; but neither the energy storage device in the communication site nor the photovoltaic power supply device is currently provided with a DC/DC converter for cost saving reasons. In addition, from the consideration of the bearing capacity of a switch power supply fuse or an energy storage device battery cell of a communication station, namely from the consideration of the safety of the communication station and the protection of the energy storage device battery cell, current limiting is usually set when the energy storage device is charged, so that the charging of the energy storage device cannot be completed in a shorter time.

For this reason, referring to fig. 2, the power supply system scheduling method provided by the embodiment of the application includes the following steps:

s201, under the condition that the energy storage device is charged by the mains supply equipment, judging whether the charging voltage of the energy storage device by the mains supply equipment conflicts with the maximum output voltage of the photovoltaic power supply equipment.

In some examples, referring to fig. 3, at the beginning of the time when the current time reaches the second valley (e.g., may be 11:00 as shown in fig. 3), the energy storage device may be charged by the mains power supply device, so that when the dc load of the communication station is used at the second peak (e.g., may be 13:00-22:00 as shown in fig. 3), the dc load may be powered by the energy storage device, so that the power consumption peak period at the second peak can effectively reduce the power grid pressure.

It will be appreciated that during the period when the energy storage device is initially charged, the energy storage device is discharged during the first peak (e.g., 8:00-11:00 shown in fig. 3) during the peak period of power consumption, so that the voltage of the energy storage device itself is relatively low, and the mains supply device can maintain a relatively low charging voltage (also referred to as a switching power supply dc output voltage in some examples) to charge the energy storage device.

In some examples, after the charging voltage of the energy storage device by the mains power supply device is raised to a certain extent, a conflict may occur between the charging voltage of the energy storage device by the mains power supply device and the maximum output voltage of the photovoltaic power supply device.

In some examples of the embodiment of the application, whether the charging voltage of the energy storage device by the mains supply power supply equipment conflicts with the maximum output voltage of the photovoltaic power supply equipment is judged, so that the charging voltage of the energy storage device by the mains supply power supply equipment can be prevented from inhibiting the output voltage of the photovoltaic power supply equipment, and the full utilization of illumination by the photovoltaic power supply equipment can be ensured.

In some examples, the charging voltage of the energy storage device by the mains supply device may be compared with a first preset voltage threshold, and in the case that the charging voltage of the energy storage device by the mains supply device is greater than the first preset voltage threshold, a conflict between the charging voltage of the energy storage device by the mains supply device and the maximum output voltage of the photovoltaic supply device is determined. In some examples, the first preset voltage threshold is less than a maximum output voltage value first threshold of the photovoltaic power supply apparatus.

In some examples, to ensure the safety of the power output voltage of the photovoltaic power supply apparatus, the maximum output voltage value of the photovoltaic power supply apparatus may be 55.8V to 56.8V according to the safety operation level of the communication station. As a specific example, the first threshold may be 0.5V, i.e., the first preset voltage threshold may be 55.3V-56.3V; it will be appreciated that, in some examples of embodiments of the present application, the first threshold may also be other values, for example, 0.55V, 0.6V, or 0.65V, which are described in detail in the foregoing embodiments of the present application, where specific values of the first threshold are shown as only some examples, and are not limiting.

S202, determining a first remaining charging time based on the remaining to-be-charged amount and a first preset charging voltage in the case that the judgment result is a conflict.

As described in detail in the foregoing embodiments of the present application, when the charging voltage of the mains supply apparatus for charging the energy storage apparatus is greater than the first preset voltage threshold, the charging voltage of the mains supply apparatus may suppress the output voltage of the photovoltaic supply apparatus, and for this reason, in the embodiment of the present application, the first remaining charging time is determined based on the remaining to-be-charged amount and the first preset charging voltage.

In some examples, the remaining to-be-charged amount may be determined by the mains supply apparatus from a second peak time (e.g., 13:00-22:00 shown in fig. 3) to a current time at which the mains supply apparatus has charged, a sum of amounts of electricity required for the dc loads during the peak and peak periods of electricity consumption, a sum of amounts of power generation by the photovoltaic supply apparatus, and a start time at the second valley time (e.g., 11:00 shown in fig. 3). It can be understood that the remaining to-be-charged amount may be a difference between the power consumption required by the dc load at the second peak, the power generation amount of the photovoltaic power supply apparatus, and the starting time (for example, 11:00 shown in fig. 3) at the second valley to the charged amount of the energy storage apparatus by the mains power supply apparatus at the current time, so as to obtain the remaining to-be-charged amount.

In some examples of the embodiment of the present application, the first preset charging voltage may be a fixed average charging voltage described in the foregoing embodiment of the present application, for example, may be 56.4V in some examples, that is, the suppression of the output voltage of the photovoltaic power supply apparatus at the end of charging regardless of the current time to the second valley time end time (for example, 13:00 shown in fig. 3), that is, the first remaining waiting time is determined by charging the energy storage apparatus with the fixed average charging voltage.

In some examples, the first remaining priming time may be determined according to the following equation (1):

t₁=E_{To be filled with}×1000/（V₁/I_{Filling material}）（1）

Wherein t ₁ is a first remaining time to be charged, E _{To be filled with} is a remaining amount to be charged, the unit is kWh, V ₁ is a first preset charging voltage, and I _{Filling material} is a charging current.

In some examples, the first preset charging voltage may also be stepped up. The charging current of the commercial power supply equipment to the energy storage equipment is kept unchanged through the charging voltage which is gradually raised, so that the energy storage equipment is charged, and the first remaining waiting time is determined.

S203, determining a first power generation amount of normal power generation of the photovoltaic power supply equipment and a second power generation amount of abnormal power generation of the photovoltaic power supply equipment based on the first remaining charging time and the power generation power of the current photovoltaic power supply equipment.

In the embodiment of the application, after the first remaining charging time t ₁ is determined, the first power generation amount which is generated normally by the photovoltaic power supply device in the first remaining charging time can be determined. In some examples, the first amount of power generated by the photovoltaic power unit that normally generates power may be determined by the following equation (2):

E₁=P×t₁ （2）

Wherein E ₁ is the first power generation amount, and P is the power generation power of the photovoltaic power supply equipment at the current moment.

In addition, in some embodiments of the present application, the second power generation amount may be an amount of power generated by the photovoltaic power supply device in an abnormal manner, and as some examples of embodiments of the present application, when the photovoltaic power supply device in an abnormal manner generates power, the second power generation amount may be determined according to 20% of the generated power generated by the normal power generation, so that the determination is performed according to the maximum generated power of the abnormal generated power, and accuracy of the economic benefit measurement may be ensured.

That is, E ₂=P×t₁ X20%; wherein E ₂ is the second power generation amount.

S204, determining a first economic benefit of electricity consumption under the condition that the charging voltage is boosted to a first preset charging voltage to charge the energy storage device based on the remaining to-be-charged amount, the energy storage charging and discharging efficiency, the peak Gu Dianfei price difference, the second generated energy and the valley-time electricity price.

In some examples, the first economic benefit may be determined according to the following equation (3):

S₁=E_{To be filled with}×η×（q₁-q₂）+E₂×q₂ （3）

Wherein S ₁ is the first economic benefit, eta is the charge and discharge efficiency of the energy storage device, q ₁ is the electricity price in the electricity consumption peak period, and q ₂ is the electricity price in the electricity consumption valley period.

S205, determining a second economic benefit of charging the energy storage device with a first preset voltage threshold based on the first power generation amount, the off-peak power price, the first charge amount, the energy storage charging and discharging efficiency and the peak-off power price difference; the first charge level is a charge level that charges the energy storage device for a first remaining charge time with a first preset voltage threshold.

In some examples, the second economic benefit may be determined according to the following equation (4):

S₂=E₁×q₂+E_x×η×（q₁-q₂）（4）

Wherein S ₂ is a second economic benefit, and E _x is a charging power amount in a first remaining charging time t ₁ when the mains supply apparatus maintains the charging voltage to be a first preset voltage threshold.

S206, determining whether to raise the charging voltage from the first preset voltage threshold to the first preset charging voltage to charge the energy storage device based on the magnitude relation of the first economic benefit and the second economic benefit.

It can be appreciated that, under the circumstance that the first economic benefit S ₁ is greater than the second economic benefit S ₂, it can be known that the economic benefit brought by charging the energy storage device by using the first preset charging voltage as the fixed average charging voltage is higher, so that the energy storage device is beneficial to avoiding electric energy waste, and at this time, the energy storage device can be charged by using the first preset charging voltage as the fixed average charging voltage preferentially.

In other examples, when the first economic benefit S ₁ is smaller than the second economic benefit S ₂, it may be known that the charging voltage is maintained at the first preset voltage threshold to charge the energy storage device, so that the economic benefit brought by the power generation efficiency of the photovoltaic power supply device is preferably ensured, the power grid pressure is reduced, the electric energy waste is avoided, the utilization rate of illumination is improved, the power generation efficiency of the photovoltaic power supply device is preferably ensured, and the charging voltage of the energy storage device by the mains power supply device is maintained at the first preset voltage threshold to charge.

According to the power supply system scheduling method provided by the embodiment of the application, whether the charging voltage of the energy storage equipment by the commercial power supply equipment conflicts with the maximum output voltage of the photovoltaic power supply equipment is judged under the condition that the energy storage equipment is charged by the commercial power supply equipment, and when the judging result is that the charging voltage conflicts with the maximum output voltage of the photovoltaic power supply equipment, the first remaining charging time is determined based on the remaining to-be-charged amount and the first preset charging voltage, wherein the first preset voltage threshold value is smaller than the first threshold value of the maximum output voltage value of the photovoltaic power supply equipment; then, based on the first remaining charging time and the generated power of the current photovoltaic power supply equipment, determining a first generated power of the photovoltaic power supply equipment under the condition of normal power generation and a second generated power of the photovoltaic power supply equipment for abnormal power generation (for example, under the condition that the charging voltage of the commercial power supply equipment is larger than a first preset voltage threshold value); finally, determining first economic benefits of charging the energy storage device by the mains supply power supply device when the charging voltage of the mains supply power supply device is raised to a first preset charging voltage based on the remaining to-be-charged amount, the energy storage charging and discharging efficiency, peak Gu Dianfei price difference, second generated energy and valley-time electricity price, wherein the first economic benefits are the economic benefits of charging the energy storage device by the mains supply power supply device so as to meet the discharge requirement of the energy storage device on the direct current load in the electricity utilization peak period; determining a second economic benefit of charging the energy storage device with a first preset voltage threshold based on the first power generation amount, the off-peak power price, the first charge amount, the energy storage charging and discharging efficiency and the peak-off power price difference; the first charging electric quantity is the charging electric quantity for charging the energy storage device for a first residual charging time by using a first preset voltage threshold value, namely, under the condition that the second economic benefit is the power generation efficiency of the photovoltaic power supply device, the energy storage device is charged by using the charging voltage of the first preset voltage threshold value so as to meet the economic benefit that the energy storage device discharges the direct current load when using electricity Gao Fengqi; and then, the charging voltage of the energy storage device by lifting the commercial power supply equipment can be determined through the first economic benefit and the second economic benefit, or the charging voltage of the energy storage device by maintaining the commercial power supply equipment to be a first preset voltage threshold value by ensuring the photovoltaic power generation efficiency. Therefore, compared with the related art, the device with higher economic benefit in the photovoltaic power supply device and the commercial power supply device can be fully utilized to supply power to the direct current load, so that when the commercial power supply device has poorer economic benefit, the photovoltaic power supply device can be fully utilized to supply power to the direct current load, the power grid pressure can be reduced, and the utilization rate of illumination is improved.

Fig. 4 is a flowchart of another implementation of a power supply system scheduling method according to an embodiment of the present application.

Referring to fig. 4, in some examples of embodiments of the present application, the power supply system scheduling method further includes the steps of:

s401, determining a second remaining charging time from the current moment to a preset charging end moment under the condition that the charging voltage of the commercial power supply equipment to the energy storage equipment is larger than a first preset voltage threshold value.

It may be appreciated that in some examples, where the charging voltage at which the mains powered device charges the energy storage device is greater than the first preset voltage threshold, the mains powered device has charged the energy storage device for a period of time from a start time (e.g., 11:00 as shown in fig. 3) at a second valley, where the second remaining charging time may be a time t ₂ between the current time and a charging end time (e.g., 13:00 as shown in fig. 3 at the second valley); for example, in some examples, the current time may be 12:00, then the second remaining charging time t ₂ may be 1h, or in some examples, the current time may be 12:30, then the second remaining charging time t ₂ may be 0.5h.

S402, determining a third remaining charging time required for charging the energy storage device from the current moment to the completion of charging with the first preset voltage threshold based on the historical charging and discharging data.

In some examples of embodiments of the present application, a correspondence between charging current and charging time when charging the energy storage device with the first preset voltage threshold may be determined based on historical charging and discharging data; for example, a linear relationship of current drop may be calculated based on historical charge and discharge data simulation of the energy storage device, e.g., the linear relationship of current drop may be as follows equation (5):

I( t₃ ) = I_{Filling material}+ a×t₃ （5）

Wherein, I (t ₃) is the current at time t ₃, t ₃ is the third remaining charging time, and a is a proportionality constant; it is understood that the third remaining charging time t ₃ is obtained when the charging current drops to 0, i.e., I (t ₃) is 0. That is, in some examples of the embodiment of the present application, the third remaining charging time required from the present time to the completion of charging may be determined based on the correspondence of the charging current and the charging time.

In the embodiment of the application, the historical charge and discharge data can be the historical charge and discharge data of the current communication station, and can also be the historical charge and discharge data of other communication stations of the same type as the current communication station.

S403, determining a second charge amount for charging the energy storage device with the first preset voltage threshold based on the minimum value of the second remaining charging time and the third remaining charging time, and the first preset voltage threshold.

That is, in some examples of the embodiment of the present application, the second charge amount may be obtained by integrating and summing the first preset voltage threshold according to the minimum value of the second remaining charge time and the third remaining charge time, where the second charge amount may be the charge amount E _x in the first remaining charge time t ₁ when the mains supply apparatus maintains the charge voltage to the first preset voltage threshold as described in the foregoing embodiment of the present application.

And s404, charging the energy storage device with a first preset voltage threshold under the condition that the difference value between the second charging electric quantity and the residual to-be-charged quantity is within a first preset electric quantity threshold range.

It can be appreciated that, under the condition that the second charge capacity is equal to the remaining to-be-charged amount, it can be determined that the energy storage device is charged through the first preset voltage threshold, so that the charging of the remaining to-be-charged amount can be satisfied, that is, the electricity consumption requirement of the dc load with the electricity consumption peak at the second peak (for example, 13:00-22:00 shown in fig. 3) can be satisfied, therefore, the energy storage device can be charged through the first preset voltage threshold at this time, so that the charging requirement of the energy storage device can be ensured, the generated power of the photovoltaic power supply device can not be influenced, and the illumination resource can be fully utilized.

In some examples, there may be a certain error between the second charge amount and the remaining to-be-charged amount that is calculated theoretically, so in the embodiment of the present application, when the difference between the second charge amount and the remaining to-be-charged amount is within the first preset electric amount threshold range, it may be determined that the second charge amount is equal to the remaining to-be-charged amount. In some examples, the first preset charge threshold may be 0.2kWh; it is understood that, in the embodiment of the present application, the first preset electric quantity threshold value may also be other values, for example, 0.25kWh or 0.3 kWh; the specific value of the first preset electrical quantity threshold is shown as a specific example only, and is not limited thereto.

In other examples of the embodiments of the present application, when the second charge amount for charging the energy storage device with the first preset voltage threshold is smaller than the first preset charge amount threshold, it may be determined that the power consumption requirement of the power consumption peak dc load when the second peak is not satisfied by charging the energy storage device with the first preset voltage threshold, and at this time, the power supply system scheduling method provided by some embodiments of the present application further includes the following steps:

s405, determining a first remaining charging time based on the remaining to-be-charged amount and the first preset charging voltage.

S406, determining a first power generation amount of normal power generation of the photovoltaic power supply equipment and a second power generation amount of abnormal power generation of the photovoltaic power supply equipment based on the first residual charging time and the power generation power of the current photovoltaic power supply equipment.

S407, determining a first economic benefit of electricity consumption under the condition that the charging voltage is boosted to a first preset charging voltage to charge the energy storage device based on the remaining to-be-charged amount, the energy storage charging and discharging efficiency, the peak Gu Dianfei price difference, the second generated energy and the valley-time electricity price.

S408, determining a second economic benefit of charging the energy storage device with the first preset voltage threshold based on the first power generation amount, the off-peak power rate, the first charge amount, the energy storage charging and discharging efficiency, and the peak-off power rate.

S409 determining whether to raise the charging voltage from the first preset voltage threshold to a first preset charging voltage to charge the energy storage device based on the magnitude relationship of the first economic benefit and the second economic benefit.

It should be noted that, in the embodiment of the present application, s405-s409 may be the same as or similar to s202-s206 in the previous embodiment of the present application, and specific reference may be made to the detailed description of the previous embodiment of the present application, which is not repeated herein.

Fig. 5 is a flowchart of still another implementation of the power supply system scheduling method according to an embodiment of the present application.

It will be appreciated that in some examples of embodiments of the present application, the mains supply apparatus starts to charge the energy storage apparatus at the start time of the second valley, at this time, since the electric quantity in the energy storage apparatus discharges to the dc load during the power consumption peak period of the first peak (for example 08:00-11:00 shown in fig. 3), the voltage of the energy storage apparatus is lower, and the dc output voltage of the switching power supply may be relatively lower when the energy storage apparatus starts to be charged at the start time of the second valley, and as the voltage of the energy storage apparatus increases, the dc output voltage of the switching power supply increases accordingly; therefore, in some examples of the embodiments of the present application, before the charging voltage of the energy storage device by the mains supply power supply device is greater than the first preset voltage threshold, the charging voltage of the energy storage device by the mains supply power supply device needs to be determined in a circulating manner, and illustratively, the power supply system scheduling method provided by the embodiments of the present application further includes the following steps:

s501, in a first preset charging period, a charging cycle is executed until the remaining to-be-charged amount is zero, or until the charging voltage of the energy storage device by the mains supply device is greater than a first preset voltage threshold.

In some examples, the first preset charging period may be a power-on valley period, such as the second valley period described in the foregoing embodiments of the present application. That is, the mains supply device starts to charge the energy storage device from the starting time of the second valley, at this time, a charging cycle is performed, and the dc output voltage of the switching power supply is subjected to cycle monitoring and confirmation until the remaining to-be-charged amount is zero (i.e., when the voltage of the mains supply device for charging the energy storage device at the second valley is less than the first preset voltage threshold, the discharging requirement of the energy storage device for the dc load at the peak period of electricity consumption at the second peak is enough to be completed), or until the charging voltage of the mains supply device for charging the energy storage device is greater than the first preset voltage threshold.

Wherein the charging cycle comprises the steps of:

s5011, determining the current remaining waiting charge amount and the current time.

For example, the mains supply device starts to charge the energy storage device from the second valley starting time, the remaining to-be-charged amount needed to charge the energy storage device is 50 kWh from the second valley starting time, when the energy storage device is charged to the first time (for example, 11:30), the charged amount is 20 kWh, the current remaining to-be-charged amount is 30 kWh, and the current time is 11:30. That is, in some embodiments of the present application, the current remaining charge amount at the current time is a difference between the total amount that needs to be charged and the charged amount. The total amount of charging required can be determined according to the detailed description of the foregoing embodiments of the present application, which will not be described in detail.

S5012, when the current remaining to-be-charged amount is greater than zero and the current time does not reach the preset charging end time, determining the current charging voltage based on the current total voltage of the energy storage device, the target charging current and the wiring resistance from the energy storage device to the direct current bus.

That is, in some examples of the embodiment of the present application, when the charging time is less than the end time of the second valley (for example, 13:00 shown in fig. 3), in some examples, the preset charging end time may be 13:00, and the current remaining charge amount is greater than zero (i.e., the current charge amount is still insufficient to satisfy the discharging requirement of the dc load when the second peak is not satisfied), at this time, the current charging voltage may be determined according to the following formula (6):

V_{Currently, the method is that}=V_{Storage device}+I_{Filling material}×R_{Wire (C)} （6）

wherein, V _{Currently, the method is that} is the current charging voltage, V _{Storage device} is the voltage of the current energy storage device, I _{Filling material} is the target charging current, and R _{Wire (C)} is the wiring resistance from the energy storage device to the DC bus.

It may be appreciated that in some examples, in a case where the current time has reached a preset charging end time (e.g. 13:00), there may be two cases where the current remaining amount of charge is greater than zero, and the first case; at this time, although the charge amount of the energy storage device does not meet the power consumption amount of the direct current load at the second peak, in order to avoid the load caused by the power consumption peak at the second peak to the power grid, the continuous charging of the energy storage device is stopped at this time; and in the second case, the current residual charging quantity is equal to zero, and at the moment, the charging quantity of the energy storage device meets the power consumption quantity of the direct current load, and the continuous charging of the energy storage device is stopped.

S5013, judging the magnitude of the current charging voltage and the first preset voltage threshold.

And waiting for a preset time length under the condition that the current charging voltage is smaller than a first preset voltage threshold value, and executing step s5011 to determine the current remaining waiting charge amount at the next moment after the preset time length.

In some examples of embodiments of the present application, the preset time length may be 30s, 45s, 1min, 1.5min, etc. In the embodiment of the application, the specific time of the preset time length is not limited.

It will be appreciated that in case the current charging voltage is greater than the first preset voltage threshold, the power supply system may be scheduled in the manner of the previous embodiment of the application.

For example, the following steps may be included:

S502, determining a first residual charging time based on the residual to-be-charged amount and a first preset charging voltage.

S503, determining a first power generation amount of normal power generation of the photovoltaic power supply equipment and a second power generation amount of abnormal power generation of the photovoltaic power supply equipment based on the first residual charging time and the power generation power of the current photovoltaic power supply equipment.

S504, determining a first economic benefit of electricity consumption under the condition that the charging voltage is boosted to a first preset charging voltage to charge the energy storage device based on the remaining to-be-charged amount, the energy storage charging and discharging efficiency, the peak Gu Dianfei price difference, the second generated energy and the valley-time electricity price.

S505, determining a second economic benefit of charging the energy storage device with a first preset voltage threshold based on the first power generation amount, the off-peak power price, the first charge amount, the energy storage charging and discharging efficiency and the peak-off power price difference.

S506, determining whether to raise the charging voltage from the first preset voltage threshold to the first preset charging voltage to charge the energy storage device based on the magnitude relation of the first economic benefit and the second economic benefit.

It should be noted that, in the embodiment of the present application, s502-s506 may be the same as or similar to s202-s206 in the previous embodiment of the present application, and specific reference may be made to the detailed description of the previous embodiment of the present application, which is not repeated herein.

In the embodiment of the application, the current voltage of the energy storage device is determined through the charging cycle, so that the direct-current output voltage of the switching power supply (namely, the charging voltage for charging the energy storage device by the mains supply power supply device) is gradually raised according to the current voltage of the energy storage device, the conflict between the charging voltage and the output voltage of the photovoltaic power supply device can be avoided, sufficient illumination resources in the second valley can be effectively utilized, and the utilization rate of the illumination resources is improved.

In other optional examples of the embodiment of the present application, before the charging cycle is performed in the first preset charging period, the scheduling method of the power supply system further includes the steps of:

s601, obtaining weather prediction data corresponding to the power supply system in a first preset power utilization time period, and obtaining historical data of the power supply system in a second preset power utilization time period; the second preset power usage period includes the first preset power usage period.

In some examples, the first preset electricity consumption time period may be a time period when electricity consumption peaks are met and the illumination condition meets the requirement that the photovoltaic power generation device normally generates electricity, in some examples, the first preset electricity consumption time period may be a part of a time period in the second peak time described in the foregoing embodiments of the present application, for example, 13:00-18:00, and the weather preset data corresponding to the first preset electricity consumption time period may be weather forecast or weather meteorological data from each day.

In some examples of the embodiments of the present application, the second preset power usage period may be the second peak time described in the foregoing embodiments of the present application, for example, 13:00-22:00, it may be understood that the second preset power usage period may include the first preset power usage period. The historical data of the second preset electricity consumption time period can be electricity consumption condition data of the communication station in the same past year, the same past month or the same past week, such as power consumption of the direct current load in the second preset electricity consumption time period. Of course, in other embodiments, the historical data may also be data information such as the starting condition of the device in the dc load in the second preset power consumption period.

S602, determining a third power generation amount of the photovoltaic power supply apparatus in the first preset power utilization period based on the weather prediction data.

For example, the illumination intensity during the first preset time period may be determined by weather prediction data, so as to determine the third power generation amount provided by the photovoltaic device to the dc load during the first preset power usage time period.

S603, determining the power consumption of the direct current load in the second preset power consumption time period based on the historical data.

S604, obtaining the current residual electric quantity of the energy storage device.

It may be appreciated that, in the embodiment of the present application, the current remaining capacity of the energy storage device may refer to the current remaining capacity of the energy storage device at the starting time of the second valley. Of course, in some examples, the current remaining power of the energy storage device may also refer to the remaining power at any time during the second valley time (e.g., 11:00-13:00) that is the time period of the power usage valley.

S605, determining a current remaining to-be-charged amount based on the power consumption amount of the direct current load, the third power generation amount and the current remaining power.

For example, in some examples, the remaining total amount of charge may be determined based on the amount of power used by the dc load, the third amount of power generation, and the current amount of charge remaining. In some examples of embodiments of the present application, the remaining total amount of charge may be determined according to some formula (7); here, the remaining total amount of electricity to be charged may refer to the remaining total amount of electricity to be charged when charging is started at the start time at the second valley:

E_{Filling material}= E_{Straight line}-E_{Remainder of the process}-E_{Light source} （7）

Wherein, E _{Filling material} is the total remaining power to be charged, E _{Straight line} is the power consumption of the dc load, E _{Remainder of the process} is the current remaining power of the energy storage device, and E _{Light source} is the third power generation amount.

And determining the current remaining to-be-charged amount based on the remaining to-be-charged total amount and the charged amount. It is understood that in some examples, the current remaining to-be-charged amount is a difference between the total remaining to-be-charged amount and the charged amount.

In some examples, the current remaining to-be-charged amount may be determined according to the following equation (8):

E_{To be filled with}=E_{Filling material}–E_{Filled with water} （8）

Wherein E _{To be filled with} is the current remaining to-be-charged amount, E _{Filling material} is the total remaining to-be-charged amount, and E _{Filled with water} is the amount of electricity charged from the mains supply device to the energy storage device from the starting time (e.g. 11:00) to the current time when the second valley is formed.

According to the power supply system scheduling method provided by the embodiment of the application, in the second valley, the energy storage equipment is charged through the mains supply equipment, so that the economic benefit can be improved, and the electric energy waste can be avoided. On the premise of ensuring the safety of the energy storage equipment and the communication site, the energy storage equipment can discharge the direct current load at the time of using electricity peak and at the time of tip at the second peak (for example, 13:00-22:00), so that peak clipping at the second peak is realized.

On the other hand, in a first preset time period (i.e. a time period when the power peak is used and the illumination is sufficient, and the photovoltaic power supply equipment can normally supply power, for example, 13:00-18:00), the photovoltaic power supply equipment can continuously supply power to the direct current load, so that the photovoltaic power supply equipment can share the electric quantity of part of the direct current load, and the energy storage equipment is not required to be fully charged by the mains power supply equipment when the electric quantity of the energy storage equipment meets the discharge quantity when the energy storage equipment is in a second valley (for example, 11:00-13:00); therefore, the charging electric quantity of the mains supply equipment to the energy storage equipment in the second valley period can be effectively reduced, the load of the mains supply equipment is reduced, and the energy consumption is saved.

Therefore, according to the power supply system scheduling method provided by the embodiment of the application, the charging quantity required in the actual second valley is taken as a core target, and the charging voltage of the energy storage device is continuously and dynamically adjusted.

In some examples, the voltage of the energy storage device is relatively low during the early and mid phases of charging the energy storage device; the method can abandon a fixed uniform charging voltage mode, utilizes the condition that the voltage of the energy storage device is in a middle-low range, dynamically tracks and calculates the capacity state (State of Capacity, SOC for short) of the energy storage device, gradually lifts the charging voltage of the commercial power supply device to the energy storage device, ensures that the charging voltage of the commercial power supply device to the energy storage device meets the charging pressure difference requirement to the maximum extent, and does not influence the output voltage of the commercial power supply device. The illumination condition during two valleys of Li Rongdi can be fully satisfied, and the utilization rate of the photovoltaic power supply equipment is improved.

In some examples, in the later stage of charging the energy storage device, the voltage of the energy storage device is continuously raised, and the power supply mode of the power supply system can be scheduled in different modes according to the magnitude of the remaining required charging power; for example, if the charge of the remaining power can be completed by adopting the constant voltage down-flow mode, the charge voltage does not need to be further raised; or calculating the charging voltage of the photovoltaic power supply equipment and the commercial power supply equipment for charging the energy storage equipment based on the maximum profit principle to adjust; therefore, the photovoltaic power supply equipment can be utilized to generate power to the greatest extent, and the utilization rate of the photovoltaic power supply equipment is improved; in addition, the load of the mains supply can be reduced, so that the effects of energy conservation and emission reduction are achieved.

Fig. 7 is a block diagram of a power supply system scheduling apparatus according to an embodiment of the present application.

Referring to fig. 1 and fig. 7, the embodiment of the application further provides a power supply system dispatching device, wherein the power supply system comprises a photovoltaic power supply device, a mains supply device, an energy storage device and a direct current load, the photovoltaic power supply device and the mains supply device are electrically connected with the direct current load through a direct current bus, and the photovoltaic power supply device, the mains supply device and the direct current load are electrically connected with the energy storage device; the apparatus comprises a controller 71, wherein the controller 71 comprises:

the judging module 710 is configured to judge whether a charging voltage of the energy storage device by the mains supply device and a maximum output voltage of the photovoltaic power supply device conflict when the energy storage device is charged by the mains supply device;

A determining module 711, configured to determine a first remaining charging time based on the remaining to-be-charged amount and a first preset charging voltage if the determination result is a conflict;

In some examples, the determining module 711 may be configured to determine that the determination result is a conflict when the charging voltage of the mains supply apparatus to the energy storage apparatus is greater than the first preset voltage threshold; the first preset voltage threshold is smaller than a first threshold of the maximum output voltage value of the photovoltaic power supply equipment;

The determining module 711 is further configured to determine a first power generation amount of normal power generation of the photovoltaic power supply apparatus and a second power generation amount of abnormal power generation of the photovoltaic power supply apparatus based on the first remaining charging time and the current power generation power of the photovoltaic power supply apparatus;

The determining module 711 is further configured to determine a first economic benefit of electricity consumption when the charging voltage is boosted to a first preset charging voltage to charge the energy storage device based on the remaining to-be-charged amount, the energy storage charging and discharging efficiency, the peak Gu Dianfei price difference, the second generated energy, and the off-peak electricity price;

The determining module 711 is further configured to determine a second economic benefit of charging the energy storage device with the first preset voltage threshold based on the first power generation amount, the electricity price at valley time, the first power charge amount, the energy storage charging and discharging efficiency, and the peak-valley electricity charge price difference; the first charging electric quantity is the charging electric quantity for charging the energy storage equipment for a first residual charging time by a first preset voltage threshold value;

The determining module 711 is further configured to determine whether to raise the charging voltage from the first preset voltage threshold to the first preset charging voltage to charge the energy storage device based on the magnitude relation of the first economic benefit and the second economic benefit.

In some examples, the determination module 711 includes:

A first sub-determining unit 7111 for raising the charging voltage to a first preset charging voltage to charge the energy storage device in case that the first economic benefit is greater than the second economic benefit;

the second sub-determining unit 7112 is configured to maintain charging of the energy storage device with the first preset voltage threshold in case the first economic benefit is smaller than the second economic benefit.

In some examples of the embodiment of the present application, the determining module 711 is further configured to determine, when the charging voltage of the energy storage device by the mains supply apparatus is greater than the first preset voltage threshold, a second remaining charging time from the current time to a preset charging end time;

the determining module 711 is further configured to determine, based on the historical charge-discharge data, a third remaining charging time required from a current time to completion of charging to charge the energy storage device with the first preset voltage threshold;

The determining module 711 is further configured to determine a second charge amount for charging the energy storage device with the first preset voltage threshold based on a minimum value of the second remaining charging time and the third remaining charging time, and the first preset voltage threshold;

The controller further includes: and the charging module 712 is configured to charge the energy storage device with a first preset voltage threshold when a difference between the second charge amount and the remaining to-be-charged amount is within a first preset electric amount threshold.

In some examples of embodiments of the present application, the determining module 711 is further configured to determine, based on the historical charge-discharge data, a correspondence between a charging current and a charging time when the energy storage device is charged with the first preset voltage threshold;

the determining module 711 is further configured to determine a third remaining charging time required from the current time to the completion of charging based on a correspondence relationship between the charging current and the charging time.

In some examples of embodiments of the present application, the controller further includes a cycling module 713 for performing a charging cycle during a first preset charging period until the remaining to-be-charged amount is zero, or until the charging voltage of the energy storage device by the mains supply is greater than a first preset voltage threshold; a circulation module 713 comprising:

a third determination subunit 7131 for determining a current remaining to-be-charged amount and a current time;

A fourth determining subunit 7132, configured to determine, when the current remaining to-be-charged amount is greater than zero and the current time does not reach the preset charging end time, a current charging voltage based on the current total voltage of the energy storage device, the target charging current, and a wiring resistance from the energy storage device to the dc bus;

A judging subunit 7133, configured to judge the current charging voltage and the first preset voltage threshold;

A fifth determining subunit 7134, configured to wait for a preset time length and determine a current remaining to-be-charged amount at a next time after the preset time length when the current charging voltage is less than the first preset voltage threshold.

In other examples of embodiments of the present application, the controller 71 further includes:

An obtaining module 714, configured to obtain weather prediction data corresponding to the power supply system in a first preset power utilization time period, and obtain historical data of the power supply system in a second preset power utilization time period; the second preset electricity utilization period comprises a first preset electricity utilization period;

The determining module 711 is further configured to determine a third power generation amount of the photovoltaic power supply apparatus in the first preset power utilization period based on the weather prediction data;

the determining module 711 is further configured to determine, based on the historical data, an amount of electricity used by the dc load in a second preset electricity usage period;

the obtaining module 714 is further configured to obtain a current remaining power of the energy storage device;

The determining module 711 is further configured to determine a current remaining to-be-charged amount based on the power consumption amount of the dc load, the third power generation amount, and the current remaining power.

Referring to fig. 8, an embodiment of the present application further provides a communication station 80, including a processor 81, a storage 82, and a computer program stored on the storage and capable of running on the processor 81, where the computer program is executed by the processor 81 to implement the power supply system scheduling method provided by any of the alternative implementations of the foregoing embodiment of the present application.

Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random-access Memory (Random Access Memory, RAM), or the like.

Finally, it should be noted that: the above embodiments are merely for illustrating the technical solution of the present disclosure, and are not limiting thereof; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.

Claims

1. The power supply system scheduling method is characterized by being applied to a power supply system of a communication site, wherein the power supply system comprises photovoltaic power supply equipment, commercial power supply equipment, energy storage equipment and a direct current load, the photovoltaic power supply equipment and the commercial power supply equipment are electrically connected with the direct current load through a direct current bus, and the photovoltaic power supply equipment, the commercial power supply equipment and the direct current load are electrically connected with the energy storage equipment through the direct current bus; the method comprises the following steps:

judging whether the charging voltage of the energy storage equipment by the commercial power supply equipment conflicts with the maximum output voltage of the photovoltaic power supply equipment or not under the condition that the energy storage equipment is charged by the commercial power supply equipment;

determining that the judging result is conflict under the condition that the charging voltage of the commercial power supply equipment to the energy storage equipment is larger than a first preset voltage threshold value; the first preset voltage threshold is smaller than a first threshold of the maximum output voltage value of the photovoltaic power supply equipment;

determining a first power generation amount of normal power generation of the photovoltaic power supply equipment and a second power generation amount of abnormal power generation of the photovoltaic power supply equipment based on the first residual charging time and the current power generation power of the photovoltaic power supply equipment;

determining a first economic benefit of electricity consumption under the condition that the charging voltage is boosted to the first preset charging voltage to charge the energy storage device based on the remaining to-be-charged amount, the energy storage charging and discharging efficiency, the peak Gu Dianfei price difference, the second generated energy and the valley-time electricity price;

Determining a second economic benefit of charging the energy storage device at a first preset voltage threshold based on the first power generation amount, the off-peak power price, a first charge amount, the energy storage charge-discharge efficiency, and the peak Gu Dianfei price difference; the first charging electric quantity is the charging electric quantity for charging the energy storage device for the first residual charging time by the first preset voltage threshold;

in the case that the first economic benefit is greater than the second economic benefit, raising the charging voltage to the first preset charging voltage to charge the energy storage device;

And maintaining the first preset voltage threshold to charge the energy storage device under the condition that the first economic benefit is smaller than the second economic benefit.

2. The power supply system scheduling method of claim 1, wherein prior to the determining the first remaining charging time, the method further comprises:

Determining a second residual charging time from the current moment to a preset charging end moment under the condition that the charging voltage of the commercial power supply equipment to the energy storage equipment is larger than a first preset voltage threshold value;

based on historical charge-discharge data, determining a third residual charge time required from the current moment to the completion of charging, wherein the energy storage equipment is charged by a first preset voltage threshold value;

Determining a second charge level to charge the energy storage device at the first preset voltage threshold based on a minimum of the second and third remaining charge times and the first preset voltage threshold;

And under the condition that the difference value between the second charging electric quantity and the residual to-be-charged quantity is within a first preset electric quantity threshold value range, charging the energy storage equipment by using the first preset voltage threshold value.

3. The power supply system scheduling method according to claim 2, wherein determining, based on the historical charge-discharge data, a third remaining charge time required from a current time to completion of charging the energy storage device with a first preset voltage threshold value, comprises:

Based on the historical charge-discharge data, determining a corresponding relationship between a charging current and a charging time when the energy storage device is charged by the first preset voltage threshold;

And determining the third residual charging time required from the current moment to the completion of charging based on the corresponding relation between the charging current and the charging time.

4. A power supply system scheduling method according to any one of claims 1-3, wherein, in case the charging voltage of the energy storage device by the mains supply power supply device is greater than a first preset voltage threshold, the method further comprises, before the step of determining a first remaining charging time based on the remaining to-be-charged amount and the first preset charging voltage:

in a first preset charging period, executing a charging cycle until the remaining to-be-charged amount is zero or until the charging voltage of the energy storage device by the mains supply power supply device is greater than the first preset voltage threshold; the charging cycle includes:

Determining the current remaining to-be-charged amount and the current moment;

Determining a current charging voltage based on a current total voltage of the energy storage device, a target charging current and a wiring resistance from the energy storage device to the direct current bus under the condition that the current remaining to-be-charged amount is larger than zero and the current moment does not reach a preset charging end moment;

judging the magnitudes of the current charging voltage and the first preset voltage threshold;

And waiting for a preset time length under the condition that the current charging voltage is smaller than the first preset voltage threshold value, and determining the current remaining waiting charge amount at the next moment after the preset time length.

5. The power supply system scheduling method of claim 4, wherein the method further comprises, prior to performing the charging cycle during the first preset charging period:

Acquiring weather forecast data corresponding to the power supply system in a first preset power utilization time period, and acquiring historical data of the power supply system in a second preset power utilization time period; the second preset electricity utilization period includes the first preset electricity utilization period;

Determining a third power generation amount of the photovoltaic power supply equipment in a first preset power utilization time period based on the weather prediction data;

Determining the electricity consumption of the direct current load in the second preset electricity consumption time period based on the historical data;

The determining the current remaining to-be-charged amount and the current time includes:

And determining the current residual waiting charge amount based on the electricity consumption of the direct current load, the third electricity generation amount and the current residual electricity amount.

6. The power supply system scheduling method according to claim 5, wherein the current remaining waiting amount is determined based on the power consumption amount of the dc load, the third power generation amount, and the current remaining power amount; comprising the following steps:

Determining the total electric quantity to be charged based on the electric quantity used by the direct current load, the third electric quantity generated by the direct current load and the current residual electric quantity;

7. The power supply system dispatching device is characterized by comprising a photovoltaic power supply device, a commercial power supply device, an energy storage device and a direct current load, wherein the photovoltaic power supply device and the commercial power supply device are electrically connected with the direct current load through a direct current bus, and the photovoltaic power supply device, the commercial power supply device and the direct current load are electrically connected with the energy storage device through the direct current bus; the device comprises:

The judging module is used for judging whether the charging voltage of the commercial power supply equipment to the energy storage equipment conflicts with the maximum output voltage of the photovoltaic power supply equipment or not under the condition that the commercial power supply equipment charges the energy storage equipment;

the determining module is used for determining that the judging result is conflicted under the condition that the charging voltage of the commercial power supply equipment to the energy storage equipment is larger than a first preset voltage threshold value; the first preset voltage threshold is smaller than a first threshold of the maximum output voltage value of the photovoltaic power supply equipment;

the determining module is further configured to determine a first remaining charging time based on the remaining to-be-charged amount and a first preset charging voltage if the determination result is a conflict;

the determining module is further configured to determine a first power generation amount of normal power generation of the photovoltaic power supply device and a second power generation amount of abnormal power generation of the photovoltaic power supply device based on the first remaining charging time and the current power generation power of the photovoltaic power supply device;

The determining module is further configured to determine a first economic benefit of electricity consumption when the charging voltage is boosted to the first preset charging voltage to charge the energy storage device based on the remaining to-be-charged amount, the energy storage charging and discharging efficiency, the peak Gu Dianfei price difference, the second generated energy, and the off-peak electricity price;

The determining module is further configured to determine a second economic benefit of charging the energy storage device with the first preset voltage threshold based on the first power generation amount, the off-peak power price, the first charge amount, the energy storage charging and discharging efficiency, and a peak-off power charge price difference; the first charging electric quantity is the charging electric quantity for charging the energy storage device for the first residual charging time by the first preset voltage threshold;

The determining module is further configured to raise the charging voltage to the first preset charging voltage to charge the energy storage device if the first economic benefit is greater than the second economic benefit;

The determining module is further configured to maintain the first preset voltage threshold to charge the energy storage device if the first economic benefit is less than the second economic benefit.

8. A communication station comprising a processor, a memory and a computer program stored on the memory and operable on the processor, which when executed by the processor, implements the power supply system scheduling method of any one of claims 1-6.