阅读说明：本技术 一种基于削峰填谷的换电站补电方法及系统 (Electricity supplementing method and system for electricity changing station based on peak clipping and valley filling ) 是由 刘作斌 熊刚 谌文平 吴晨燨 于 2021-07-14 设计创作，主要内容包括：本发明提供了换电站技术领域的一种基于削峰填谷的换电站补电方法及系统,方法包括：步骤S10、换电站设定峰电时间段、谷电时间段、平电时间段、第一数量阈值、第二数量阈值以及SOC阈值；步骤S20、换电站判断当下的时间处于峰电时间段、谷电时间段还是平电时间段,若是峰电时间段,则进入步骤S30；若是平电时间段,则进入步骤S40；若是谷电时间段,则进入步骤S50；步骤S30、换电站基于所述第一数量阈值以及SOC阈值对电池柜的电池进行充电；步骤S40、换电站基于所述第二数量阈值以及SOC阈值对电池柜的电池进行充电；步骤S50、换电站基于所述SOC阈值对电池柜的所有电池进行充电。本发明的优点在于：极大的降低了电网负荷以及换电站的运营成本。(The invention provides a power station power supplementing method and system based on peak clipping and valley filling, and the method comprises the following steps: step S10, setting a peak power time period, a valley power time period, a flat power time period, a first quantity threshold value, a second quantity threshold value and an SOC threshold value in the power conversion station; step S20, the power conversion station judges whether the current time is in a peak power time period, a valley power time period or a flat power time period, if the current time is in the peak power time period, the step S30 is executed; if the current balance time period is the current balance time period, the step S40 is executed; if the time period is the valley power time period, the process proceeds to step S50; step S30, the battery replacement station charges the batteries of the battery cabinet based on the first quantity threshold value and the SOC threshold value; step S40, the battery replacement station charges the battery of the battery cabinet based on the second quantity threshold and the SOC threshold; and step S50, the battery replacement station charges all batteries of the battery cabinet based on the SOC threshold value. The invention has the advantages that: the power grid load and the operation cost of the power conversion station are greatly reduced.)

1. A power station power supplementing method based on peak clipping and valley filling is characterized in that: the method comprises the following steps:

step S10, the charging station sets a peak power time period, a valley power time period, a flat power time period, a first quantity threshold, a second quantity threshold, and an SOC threshold;

step S20, the power conversion station judges whether the current time is in a peak power time period, a valley power time period or a flat power time period, if the current time is in the peak power time period, the step S30 is executed; if the current balance time period is the current balance time period, the step S40 is executed; if the time period is the valley power time period, the process proceeds to step S50;

step S30, the battery replacement station charges the batteries of the battery cabinet based on the first quantity threshold value and the SOC threshold value;

step S40, the battery replacement station charges the battery of the battery cabinet based on the second quantity threshold and the SOC threshold;

and step S50, the battery replacement station charges all batteries of the battery cabinet based on the SOC threshold value.

2. The power station power supplementing method based on peak clipping and valley filling as claimed in claim 1, characterized in that: in the step S10, the electricity price of the peak electricity time period is higher than that of the flat electricity time period; the electricity price of the valley electricity time period is lower than that of the flat electricity time period; the SOC threshold value is preferably 95%.

3. The power station power supplementing method based on peak clipping and valley filling as claimed in claim 1, characterized in that: the step S30 specifically includes:

the battery replacement station acquires the SOC value of each battery in the battery cabinet in real time, judges whether the number of the batteries with the SOC values larger than the SOC threshold value is larger than or equal to a first number threshold value, if so, does not perform charging operation, and goes to step S20; if not, calculating the difference n between the first quantity threshold and the battery quantity, randomly selecting n batteries to charge until the SOC value is greater than the SOC threshold, and entering the step S20.

4. The power station power supplementing method based on peak clipping and valley filling as claimed in claim 1, characterized in that: the step S40 specifically includes:

the battery replacement station acquires the SOC value of each battery in the battery cabinet in real time, judges whether the number of the batteries with the SOC values larger than the SOC threshold value is larger than or equal to a second number threshold value, if so, does not perform charging operation, and goes to step S20; if not, calculating the difference m between the second quantity threshold and the battery quantity, randomly selecting m batteries for charging until the SOC value is greater than the SOC threshold, and entering the step S20.

5. The power station power supplementing method based on peak clipping and valley filling as claimed in claim 1, characterized in that: the step S50 specifically includes:

and the battery replacement station acquires the SOC value of each battery in the battery cabinet in real time and charges all batteries with the SOC values smaller than the SOC threshold value.

6. The utility model provides a trade power station benefit electric system based on peak clipping fills in millet which characterized in that: the system comprises the following modules:

the parameter setting module is used for setting a peak power time period, a valley power time period, a flat power time period, a first quantity threshold value, a second quantity threshold value and an SOC threshold value in the power conversion station;

the time period judging module is used for judging whether the current time is in a peak power time period, a valley power time period or a flat power time period by the power conversion station, and if the current time is in the peak power time period, entering the peak power charging module; if the time period is the flat charging time period, entering a flat charging module; if the time period is the valley power time period, entering a valley power charging module;

the peak power charging module is used for charging the batteries of the battery cabinet based on the first quantity threshold and the SOC threshold by the battery replacement station;

the flat charging module is used for charging the batteries of the battery cabinet based on the second quantity threshold and the SOC threshold by the battery replacement station;

and the valley electricity charging module is used for charging all batteries of the battery cabinet based on the SOC threshold value by the battery replacement station.

7. The power station charging system based on peak clipping and valley filling as claimed in claim 6, wherein: in the parameter setting module, the electricity price of the peak electricity time period is higher than that of the flat electricity time period; the electricity price of the valley electricity time period is lower than that of the flat electricity time period; the SOC threshold value is preferably 95%.

8. The power station charging system based on peak clipping and valley filling as claimed in claim 6, wherein: the peak power charging module is specifically as follows:

the method comprises the steps that a battery replacement station obtains an SOC value of each battery in a battery cabinet in real time, whether the number of the batteries with the SOC values larger than an SOC threshold value is larger than or equal to a first number threshold value is judged, if yes, charging operation is not carried out, and a time period judgment module is started; if not, calculating the difference n between the first quantity threshold and the battery quantity, randomly selecting n batteries for charging until the SOC value is greater than the SOC threshold, and entering a time period judgment module.

9. The power station charging system based on peak clipping and valley filling as claimed in claim 6, wherein: the flat charging module specifically comprises:

the method comprises the steps that a battery replacement station obtains an SOC value of each battery in a battery cabinet in real time, whether the number of the batteries with the SOC values larger than an SOC threshold value is larger than or equal to a second number threshold value is judged, if yes, charging operation is not carried out, and a time period judgment module is started; if not, calculating a difference m between the second quantity threshold and the battery quantity, randomly selecting m batteries for charging until the SOC value is greater than the SOC threshold, and entering a time period judgment module.

10. The power station charging system based on peak clipping and valley filling as claimed in claim 6, wherein: the valley electricity charging module specifically comprises:

and the battery replacement station acquires the SOC value of each battery in the battery cabinet in real time and charges all batteries with the SOC values smaller than the SOC threshold value.

Technical Field

The invention relates to the technical field of power exchanging stations, in particular to a power supplementing method and a power supplementing system for a power exchanging station based on peak clipping and valley filling.

Background

With the rapid development of electric vehicles, the electric vehicles have a larger and larger share in the market. However, since the battery technology does not produce breakthrough progress, the electric vehicle needs to be loaded with more batteries for longer endurance, and the loading of more batteries leads to a series of problems that the cost of the whole vehicle is high, and the like, so that the endurance problem of the electric vehicle always troubles users, mileage anxiety is caused to the users, and the time spent on fully charging one electric vehicle is far longer than the time spent on adding one fuel oil to the traditional fuel oil vehicle; the operation vehicle with the largest charging demand is generally charged in the shift time period, which happens to be the electricity consumption peak of the city, and generates a great load on the city power grid; therefore, the power change station can be used for directly obtaining the endurance mileage by replacing the fully charged battery for the electric automobile.

Although the problems of land occupation and time for charging the electric automobile are relieved by the battery replacement station, the traditional battery replacement station directly charges the detached insufficient battery in order to meet the huge battery replacement requirement of the electric automobile, so that the operation cost of the battery replacement station is undoubtedly increased, and the load of a power grid is also increased.

Therefore, how to provide a power station power supplementing method and system based on peak clipping and valley filling to reduce the load of a power grid and the operation cost of a power station becomes a problem to be solved urgently.

Disclosure of Invention

The invention aims to solve the technical problem of providing a power station power supplementing method and system based on peak clipping and valley filling, so that the load of a power grid and the operation cost of a power station are reduced.

In a first aspect, the invention provides a power station power supplementing method based on peak clipping and valley filling, which comprises the following steps:

step S10, the charging station sets a peak power time period, a valley power time period, a flat power time period, a first quantity threshold, a second quantity threshold, and an SOC threshold;

step S20, the power conversion station judges whether the current time is in a peak power time period, a valley power time period or a flat power time period, if the current time is in the peak power time period, the step S30 is executed; if the current balance time period is the current balance time period, the step S40 is executed; if the time period is the valley power time period, the process proceeds to step S50;

step S30, the battery replacement station charges the batteries of the battery cabinet based on the first quantity threshold value and the SOC threshold value;

step S40, the battery replacement station charges the battery of the battery cabinet based on the second quantity threshold and the SOC threshold;

and step S50, the battery replacement station charges all batteries of the battery cabinet based on the SOC threshold value.

Further, in the step S10, the electricity price of the peak electricity time period is higher than that of the flat electricity time period; the electricity price of the valley electricity time period is lower than that of the flat electricity time period; the SOC threshold value is preferably 95%.

Further, the step S30 is specifically:

the battery replacement station acquires the SOC value of each battery in the battery cabinet in real time, judges whether the number of the batteries with the SOC values larger than the SOC threshold value is larger than or equal to a first number threshold value, if so, does not perform charging operation, and goes to step S20; if not, calculating the difference n between the first quantity threshold and the battery quantity, randomly selecting n batteries to charge until the SOC value is greater than the SOC threshold, and entering the step S20.

Further, the step S40 is specifically:

the battery replacement station acquires the SOC value of each battery in the battery cabinet in real time, judges whether the number of the batteries with the SOC values larger than the SOC threshold value is larger than or equal to a second number threshold value, if so, does not perform charging operation, and goes to step S20; if not, calculating the difference m between the second quantity threshold and the battery quantity, randomly selecting m batteries for charging until the SOC value is greater than the SOC threshold, and entering the step S20.

Further, the step S50 is specifically:

and the battery replacement station acquires the SOC value of each battery in the battery cabinet in real time and charges all batteries with the SOC values smaller than the SOC threshold value.

In a second aspect, the invention provides a power station power supply system based on peak clipping and valley filling, which comprises the following modules:

the parameter setting module is used for setting a peak power time period, a valley power time period, a flat power time period, a first quantity threshold value, a second quantity threshold value and an SOC threshold value in the power conversion station;

the time period judging module is used for judging whether the current time is in a peak power time period, a valley power time period or a flat power time period by the power conversion station, and if the current time is in the peak power time period, entering the peak power charging module; if the time period is the flat charging time period, entering a flat charging module; if the time period is the valley power time period, entering a valley power charging module;

the peak power charging module is used for charging the batteries of the battery cabinet based on the first quantity threshold and the SOC threshold by the battery replacement station;

the flat charging module is used for charging the batteries of the battery cabinet based on the second quantity threshold and the SOC threshold by the battery replacement station;

and the valley electricity charging module is used for charging all batteries of the battery cabinet based on the SOC threshold value by the battery replacement station.

Further, in the parameter setting module, the electricity price of the peak electricity time period is higher than that of the flat electricity time period; the electricity price of the valley electricity time period is lower than that of the flat electricity time period; the SOC threshold value is preferably 95%.

Further, the peak power charging module specifically comprises:

the method comprises the steps that a battery replacement station obtains an SOC value of each battery in a battery cabinet in real time, whether the number of the batteries with the SOC values larger than an SOC threshold value is larger than or equal to a first number threshold value is judged, if yes, charging operation is not carried out, and a time period judgment module is started; if not, calculating the difference n between the first quantity threshold and the battery quantity, randomly selecting n batteries for charging until the SOC value is greater than the SOC threshold, and entering a time period judgment module.

Further, the flat charging module specifically includes:

the method comprises the steps that a battery replacement station obtains an SOC value of each battery in a battery cabinet in real time, whether the number of the batteries with the SOC values larger than an SOC threshold value is larger than or equal to a second number threshold value is judged, if yes, charging operation is not carried out, and a time period judgment module is started; if not, calculating a difference m between the second quantity threshold and the battery quantity, randomly selecting m batteries for charging until the SOC value is greater than the SOC threshold, and entering a time period judgment module.

Further, the valley electricity charging module is specifically:

and the battery replacement station acquires the SOC value of each battery in the battery cabinet in real time and charges all batteries with the SOC values smaller than the SOC threshold value.

The invention has the advantages that:

1. by setting a peak power time period, a valley power time period, a flat power time period, a first quantity threshold, a second quantity threshold and an SOC threshold, the battery quantity with the SOC value larger than the SOC threshold is kept as the first quantity threshold in the peak power time period, the battery quantity with the SOC value larger than the SOC threshold is kept as the second quantity threshold in the flat power time period, all batteries are charged in the valley power time period until the SOC value is larger than the SOC threshold, namely, only full-power batteries meeting the charging requirement quantity are reserved in the peak power time period and the flat power time period, the charging of the batteries is mainly carried out in the valley power time period, the operation of a charging station in the valley power time period is not influenced, most batteries are charged in the valley power time period, and the power grid load and the operation cost of the charging station are greatly reduced.

2. By setting the SOC threshold value, the battery is charged only when the SOC value of the battery is smaller than the SOC threshold value, the overcharge of the battery is avoided, and the safety of the battery is greatly improved.

Drawings

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

Fig. 1 is a flow chart of a power station power supplement method based on peak clipping and valley filling.

Fig. 2 is a schematic structural diagram of a power supply station power supply system based on peak clipping and valley filling.

Detailed Description

The technical scheme in the embodiment of the application has the following general idea: the method comprises the steps of setting a peak power time period, a valley power time period, a flat power time period, a first quantity threshold, a second quantity threshold and an SOC threshold, wherein the full-power battery quantity is kept as the first quantity threshold in the peak power time period, the full-power battery quantity is kept as the second quantity threshold in the flat power time period, all the batteries which are not fully charged are charged in the valley power time period, and the full-power batteries which meet the charging requirement quantity are only reserved in the peak power time period and the flat power time period, and the batteries are mainly charged in the valley power time period, so that the load of a power grid and the operation cost of a charging station are reduced.

Referring to fig. 1 to 2, a preferred embodiment of a power station power supplement method based on peak clipping and valley filling of the present invention includes the following steps:

step S10, the charging station sets a peak power time period, a valley power time period, a flat power time period, a first quantity threshold, a second quantity threshold, and an SOC threshold; the first quantity threshold value is determined based on the average value of the switching quantity in the peak power time period per day in the history of the switching station, and the second quantity threshold value is determined based on the average value of the switching quantity in the flat power time period per day in the history of the switching station and is respectively used for ensuring the normal operation of the switching station in the peak power time period and the flat power time period;

step S20, the power conversion station judges whether the current time is in a peak power time period, a valley power time period or a flat power time period, if the current time is in the peak power time period, the step S30 is executed; if the current balance time period is the current balance time period, the step S40 is executed; if the time period is the valley power time period, the process proceeds to step S50;

step S30, the battery replacement station charges the batteries of the battery cabinet based on the first quantity threshold value and the SOC threshold value;

step S40, the battery replacement station charges the battery of the battery cabinet based on the second quantity threshold and the SOC threshold;

and step S50, the battery replacement station charges all batteries of the battery cabinet based on the SOC threshold value.

The batteries are charged through a peak clipping and valley filling strategy, namely most batteries are charged in a valley power time period, so that the urban power consumption peak is avoided, and the load of a power grid is greatly reduced; the battery with the SOC value smaller than the SOC threshold value is charged, so that the overcharge of the battery is avoided, and the safety of the battery is greatly improved.

In the step S10, the electricity price of the peak electricity time period is higher than that of the flat electricity time period; the electricity price of the valley electricity time period is lower than that of the flat electricity time period; the SOC threshold is preferably 95% for preventing overcharge of the battery.

The step S30 specifically includes:

the battery replacement station acquires the SOC value of each battery in the battery cabinet in real time, judges whether the number of the batteries with the SOC values larger than the SOC threshold value is larger than or equal to a first number threshold value, if so, does not perform charging operation, and goes to step S20; if not, calculating the difference n between the first quantity threshold and the battery quantity, randomly selecting n batteries to charge until the SOC value is greater than the SOC threshold, and entering the step S20.

The step S40 specifically includes:

the battery replacement station acquires the SOC value of each battery in the battery cabinet in real time, judges whether the number of the batteries with the SOC values larger than the SOC threshold value is larger than or equal to a second number threshold value, if so, does not perform charging operation, and goes to step S20; if not, calculating the difference m between the second quantity threshold and the battery quantity, randomly selecting m batteries for charging until the SOC value is greater than the SOC threshold, and entering the step S20. And n and m are both positive integers.

The step S50 specifically includes:

and the battery replacement station acquires the SOC value of each battery in the battery cabinet in real time and charges all batteries with the SOC values smaller than the SOC threshold value.

The invention relates to a better embodiment of a power station power supply system based on peak clipping and valley filling, which comprises the following modules:

the parameter setting module is used for setting a peak power time period, a valley power time period, a flat power time period, a first quantity threshold value, a second quantity threshold value and an SOC threshold value in the power conversion station; the first quantity threshold value is determined based on the average value of the switching quantity in the peak power time period per day in the history of the switching station, and the second quantity threshold value is determined based on the average value of the switching quantity in the flat power time period per day in the history of the switching station and is respectively used for ensuring the normal operation of the switching station in the peak power time period and the flat power time period;

the time period judging module is used for judging whether the current time is in a peak power time period, a valley power time period or a flat power time period by the power conversion station, and if the current time is in the peak power time period, entering the peak power charging module; if the time period is the flat charging time period, entering a flat charging module; if the time period is the valley power time period, entering a valley power charging module;

the peak power charging module is used for charging the batteries of the battery cabinet based on the first quantity threshold and the SOC threshold by the battery replacement station;

the flat charging module is used for charging the batteries of the battery cabinet based on the second quantity threshold and the SOC threshold by the battery replacement station;

and the valley electricity charging module is used for charging all batteries of the battery cabinet based on the SOC threshold value by the battery replacement station.

The batteries are charged through a peak clipping and valley filling strategy, namely most batteries are charged in a valley power time period, so that the urban power consumption peak is avoided, and the load of a power grid is greatly reduced; the battery with the SOC value smaller than the SOC threshold value is charged, so that the overcharge of the battery is avoided, and the safety of the battery is greatly improved.

In the parameter setting module, the electricity price of the peak electricity time period is higher than that of the flat electricity time period; the electricity price of the valley electricity time period is lower than that of the flat electricity time period; the SOC threshold is preferably 95% for preventing overcharge of the battery.

The peak power charging module is specifically as follows:

the method comprises the steps that a battery replacement station obtains an SOC value of each battery in a battery cabinet in real time, whether the number of the batteries with the SOC values larger than an SOC threshold value is larger than or equal to a first number threshold value is judged, if yes, charging operation is not carried out, and a time period judgment module is started; if not, calculating the difference n between the first quantity threshold and the battery quantity, randomly selecting n batteries for charging until the SOC value is greater than the SOC threshold, and entering a time period judgment module.

The flat charging module specifically comprises:

the method comprises the steps that a battery replacement station obtains an SOC value of each battery in a battery cabinet in real time, whether the number of the batteries with the SOC values larger than an SOC threshold value is larger than or equal to a second number threshold value is judged, if yes, charging operation is not carried out, and a time period judgment module is started; if not, calculating a difference m between the second quantity threshold and the battery quantity, randomly selecting m batteries for charging until the SOC value is greater than the SOC threshold, and entering a time period judgment module. And n and m are both positive integers.

The valley electricity charging module specifically comprises:

and the battery replacement station acquires the SOC value of each battery in the battery cabinet in real time and charges all batteries with the SOC values smaller than the SOC threshold value.

In summary, the invention has the advantages that:

1. by setting a peak power time period, a valley power time period, a flat power time period, a first quantity threshold, a second quantity threshold and an SOC threshold, the battery quantity with the SOC value larger than the SOC threshold is kept as the first quantity threshold in the peak power time period, the battery quantity with the SOC value larger than the SOC threshold is kept as the second quantity threshold in the flat power time period, all batteries are charged in the valley power time period until the SOC value is larger than the SOC threshold, namely, only full-power batteries meeting the charging requirement quantity are reserved in the peak power time period and the flat power time period, the charging of the batteries is mainly carried out in the valley power time period, the operation of a charging station in the valley power time period is not influenced, most batteries are charged in the valley power time period, and the power grid load and the operation cost of the charging station are greatly reduced.

2. By setting the SOC threshold value, the battery is charged only when the SOC value of the battery is smaller than the SOC threshold value, the overcharge of the battery is avoided, and the safety of the battery is greatly improved.

Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.