Method and system capable of adjusting output power of charging pile in real time

Abstract

The invention belongs to the technical field of charging piles, and discloses a method and system capable of adjusting the output power of a charging pile in real time. Comprising the steps of obtaining pre-stage power distribution capacity and a safety power value of a charging pile; in the charging process, the charging pile collects the power value of the electric meter in real time; the charging pile adjusts output power according to the electric meter power value and the pre-stage power distribution capacity and the safety power value of the charging pile, the actual available power supply power is calculated through the pre-stage power distribution capacity and the safety power value of the charging pile, and the actual available power supply power is compared with the electric meter power value; according to the comparison result, the output power of the charging pile is increased, the output power of the charging pile is reduced or the current power is maintained, under the condition of safe electricity utilization, the method is economical and practical, and the technical problem that in the prior art, when the actual electricity utilization power of the charging pile exceeds the preceding-stage power distribution capacity, current overload in a power supply line is caused is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of charging piles, and relates to a method and system capable of adjusting the output power of a charging pile in real time. Background Art

[0002] In recent years, the electric vehicle industry has shown a booming development trend. Its environmental protection and energy-saving advantages have made it more and more popular among consumers, and the market share has continued to rise. The construction of supporting charging facilities is also accelerating. Among them, AC charging piles and low-power DC charging piles have gradually entered thousands of households due to their convenience and practicality, becoming the preferred solution for many electric vehicle owners to charge conveniently at home.

[0003] In order to meet the charging needs of electric vehicles, the number of home charging piles installed is increasing. The convenience and practicality of home charging piles make it one of the preferred charging methods for electric car owners. Owners can charge their vehicles at any time at their homes or parking spaces without having to queue up at public charging stations. Home charging piles have high power, generally around 3kW-7kW AC charging piles and low-power DC piles around 10kW, which puts higher requirements on the front-end power distribution capacity of homes or communities. If the front-end power distribution capacity is not considered, the charging piles are installed and used at will, which may cause the power supply line to be overloaded and cause power safety problems. When the actual power consumption of the charging pile exceeds the front-end power distribution capacity of the front stage, it will cause the current in the power supply line to be overloaded. If the wires are in an overloaded state for a long time, it will accelerate the aging of the insulation layer, reduce the insulation performance, and even cause a short circuit and fire in the wires. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a method and system for adjusting the output power of a charging pile in real time, calculate the actual available power supply power by the front-stage distribution capacity of the charging pile and the safety power value, compare the actual available power supply power with the power value of the electric meter, and increase the output power of the charging pile, reduce the output power of the charging pile, or maintain the current power according to the comparison result, while ensuring safe electricity use and being economical and affordable, and solve the technical problem in the prior art that when the actual power consumption of the charging pile exceeds the front-stage distribution capacity, resulting in current overload in the power supply line.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: The present invention provides a method for adjusting the output power of a charging pile in real time, comprising: obtaining a front-stage power distribution capacity and a safety power value of the charging pile; during charging, the charging pile collects a meter power value in real time; and the charging pile adjusts the output power according to the meter power value and the front-stage power distribution capacity and the safety power value of the charging pile.

[0006] Furthermore, the charging pile adjusts the output power according to the meter power value and the front-stage power distribution capacity and safety power value of the charging pile, including: Charging pile front-stage distribution capacity Safety power value; meter power value Charging pile front-stage distribution capacity Safety power value; meter power value Charging pile front-stage power distribution capacity Safety power value; the power value of the meter Charging pile front-stage distribution capacity Safety power value, the output power of the charging pile is the current power value.

[0007] Furthermore, the meter power value Charging pile front-stage distribution capacity The power value of the electric meter is the maximum power value, and the output power of the charging pile is the current power value; Charging pile front-stage power distribution capacity Safety power value, the output power of the charging pile is not the maximum power value, increase the output power of the charging pile.

[0008] Furthermore, the output power of the charging pile is increased from the front-stage power distribution capacity of the charging pile. Meter power value and charging pile maximum power value Select the smaller value among the current power values ​​of the charging pile.

[0009] Furthermore, the meter power value Charging pile front-stage distribution capacity Safety power value, reduce the output power of the charging pile.

[0010] Furthermore, the power reduction value Electric meter power value - (charging pile front-stage distribution capacity - safety power value).

[0011] Furthermore, the power reduction value The charging pile outputs power and stops charging.

[0012] Furthermore, the front-stage power distribution capacity of the charging pile is set according to the actual power distribution, and the safety power value makes the actual power consumption of the charging pile and other loads less than the front-stage power distribution capacity of the charging pile.

[0013] Furthermore, the real-time collection of the meter power value by the charging pile includes connecting the charging pile communication port to the user's incoming line main meter or the power supply gateway meter communication line to collect the meter power value.

[0014] The present invention also provides a system capable of adjusting the output power of a charging pile in real time, comprising: an acquisition module for acquiring the front-stage power distribution capacity and safety power value of the charging pile; a collection module for collecting the meter power value of the charging pile in real time during the charging process; and an adjustment module for adjusting the output power of the charging pile according to the meter power value and the front-stage power distribution capacity and safety power value of the charging pile.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention provides a method for adjusting the output power of a charging pile in real time, and adjusts the output power in real time according to the power distribution capacity of the previous stage. The real-time adjustment of the output power can effectively prevent the overload of the power distribution line, thereby reducing the risk of fire. In addition, the real-time adjustment of the output power can also reduce the heating of the wires, and reduce the possibility of fire caused by overheating of the wires.

[0016] The present invention discloses a method for adjusting the output power of a charging pile in real time. Excessive output power may cause voltage fluctuations and affect the normal operation of other electrical equipment. Real-time adjustment of the output power can make the power output of the charging pile more stable, reduce the impact on the grid voltage, and thus ensure the normal operation of other electrical equipment. The present invention provides a method for adjusting the output power of a charging pile in real time. The real-time adjustment of the output power can dynamically adjust the output of the charging pile according to the change of the front-stage power distribution capacity. In different power consumption periods, the load of the distribution line may change. When the grid load is light, the charging pile can appropriately increase the output power to charge the electric vehicle at a faster speed; when the grid load is heavy, the charging pile reduces the output power to ensure that it does not exceed the front-stage power distribution capacity to avoid excessive pressure on the grid.

[0017] The present invention provides a method for adjusting the output power of a charging pile in real time. The method for adjusting the output power in real time is usually simple and easy to use, and does not require complicated installation and debugging processes. The real-time adjustment of power is automatically achieved through a built-in intelligent control system, and the user does not need to perform additional operations. Not only does it reduce costs, but it also improves the user's convenience. The user can directly connect the charging pile to the power distribution line to enjoy safe and efficient charging services. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a principle block diagram of a method for adjusting the output power of a charging pile in real time. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] Example 1 The present invention provides a method for adjusting the output power of a charging pile in real time, comprising: Figure 1 As shown, the front-stage power distribution capacity and safety power value of the charging pile are obtained; during the charging process, the charging pile collects the meter power value in real time; the charging pile adjusts the output power according to the meter power value and the front-stage power distribution capacity and safety power value of the charging pile.

[0021] Obtain the pre-distribution capacity of the charging pile: Provide corresponding pre-distribution capacity data based on the pre-distribution situation. Use professional testing equipment, such as ammeters, voltmeters, and power analyzers, to measure the load capacity and voltage stability of existing power lines. Determine the actual pre-distribution capacity through on-site surveys and tests. For example, connect test equipment near the location where the charging pile is installed, observe the power lines to determine a safe pre-distribution capacity range, and take into account possible future growth in electricity demand.

[0022] Obtaining the safe power value: The setting of the safe power value should take into account multiple factors, including the stability of the front-stage distribution capacity, the load of the power grid, and future expansion needs. If the charging pile is mainly used for charging at night, when the load on the power grid is relatively light, the safe power can be set relatively low to make full use of the front-stage distribution capacity. On the other hand, if the power grid in the area often experiences large load fluctuations or instability, the safe power should be set higher to ensure that the operation of the charging pile does not put too much pressure on the power grid.

[0023] The charging pile collects the meter power value in real time: Modern smart meters usually have communication functions and can exchange data with charging piles. The charging pile can communicate with the smart meter through wired or wireless connection to read the meter power value in real time. For example, the charging pile can be connected to the smart meter using wireless communication technologies such as RS485, Wi-Fi or Bluetooth. At regular intervals (such as a few seconds), the charging pile sends a request to the smart meter to obtain the current power value data. The smart meter sends the data back to the charging pile, and the charging pile adjusts the power according to the data.

[0024] In addition to smart meters, special sensors and monitoring devices can also be used to collect meter power values ​​in real time. These devices are installed on the power lines, directly measure the current and voltage, and calculate the power value. For example, current transformers and voltage sensors can be installed on the input lines of charging piles to monitor the changes in current and voltage in real time. These sensors transmit data to a data acquisition unit, which calculates the power value and sends it to the charging pile. The charging pile can perform precise power regulation based on these real-time power value data.

[0025] It should be noted that the front-stage distribution capacity of the charging pile is set according to the actual distribution line, and the safety power value makes the actual power consumption of the charging pile and other loads less than the front-stage distribution capacity of the charging pile, and leaves a margin.

[0026] The charging pile adjusts the output power according to the meter power value and the front-stage distribution capacity and safety power value of the charging pile, including the following situations: Charging pile front-stage distribution capacity Safety power value, meter power value Charging pile front-stage distribution capacity Safety power value, meter power value Charging pile front-stage distribution capacity Safe power value.

[0027] Example 2 The charging pile adjusts the output power according to the meter power value, the front-stage power distribution capacity of the charging pile, and the safety power value. Charging pile front-stage distribution capacity Safety power value, the output power of the charging pile is the current power value. The front-stage distribution capacity of the charging pile is 100kW, the safety power value is 10kW, the meter power value is 90kW, and the output power of the charging pile is 30kW. The safety power value is equal to the actual available power supply, specifically 100kW 10kW 90kW, the actual available power supply power of 90kW is equal to the meter power value of 90kW, so the output power of the charging pile remains unchanged at 30kW.

[0028] The front-stage distribution capacity of the charging pile is 100kW, which means that the charging pile and the subsequent loads can obtain up to 100kW of electricity from the power grid. The safety power value is 10kW, which means that when the charging pile and the subsequent loads are operating normally, the actual power consumption should be controlled within the range of the front-stage distribution capacity minus the safety power value, that is, not more than 90kW.

[0029] The setting of the safety power value mainly considers the following factors: first, to cope with possible power fluctuations and emergencies, such as a sudden increase in grid voltage or fluctuations in downstream loads; second, to reserve a certain amount of space for possible future growth in power demand. For example, as the number of electric vehicles increases, the frequency and power of charging piles may increase. At this time, a certain safety margin is needed to ensure the stability of the system.

[0030] Real-time monitoring of the meter power value is used to ensure the safety of the charging pile. By connecting to the control system of the charging pile, the meter can transmit real-time power data to the charging pile so that the charging pile can adjust the output power according to the actual power consumption. For example, if the meter power value approaches or exceeds the safety range, the charging pile can automatically reduce the output power to prevent overload.

[0031] After the charging pile is installed, it needs to be debugged to ensure that it can read the meter power value normally and adjust the output power according to the previous power distribution capacity and safe power value. During the debugging process, it is necessary to simulate various possible situations, such as grid voltage fluctuations, load fluctuations, and charging pile failures, to verify the stability and reliability of the charging pile.

[0032] Example 3 The charging pile adjusts the output power according to the meter power value and the front-stage distribution capacity and safety power value of the charging pile. Charging pile front-stage distribution capacity The safe power value requires further confirmation of whether the output power of the charging pile is the maximum power value. If the output power of the charging pile is the maximum power value, the output power of the charging pile is the current power value.

[0033] Meter power value Charging pile front-stage distribution capacity Safety power value, and the charging pile output power is the maximum power value: The front-stage power distribution capacity of the charging pile is 100kW, the safety power value is 10kW, the meter power value is 70kW, the output power of the charging pile is 60kW, and the maximum power of the charging pile is 60kW.

[0034] The actual available power supply is the front-stage power distribution capacity of the charging pile. Safe power value, that is, 100kW-10kW 90kW, meter power value 70kW The actual available power supply is 90kW, and the charging pile output power of 60kW is equal to the maximum power of the charging pile of 60kW, so the charging pile output power remains unchanged at 60kW.

[0035] Example 4 The charging pile adjusts the output power according to the meter power value and the front-stage distribution capacity and safety power value of the charging pile. Charging pile front-stage distribution capacity For the safe power value, it is necessary to further confirm whether the output power of the charging pile is the maximum power value. If the output power of the charging pile is not the maximum value, increase the output power of the charging pile.

[0036] Among them, increasing the output power of the charging pile from the front-stage distribution capacity of the charging pile Meter power value and charging pile maximum power value Select the smaller value among the current power values ​​of the charging pile.

[0037] Meter power value Charging pile front-stage distribution capacity Safety power value, if the charging pile output power is not the maximum power value, then increase the charging pile output power, increase the charging pile output power from the charging pile maximum power value The current power value of the charging pile and the front-stage power distribution capacity of the charging pile The meter power value is selected, and the maximum power value of the charging pile The current power value of the charging pile is less than the front-stage power distribution capacity of the charging pile Meter power value.

[0038] Specifically, the front-stage power distribution capacity of the charging pile is 100kW, the safety power value is 10kW, the meter power value is 70kW, the charging pile output power is 50kW, and the maximum power of the charging pile is 60kW. The charging pile output power is the current power value of the charging pile, that is, the current power value.

[0039] The actual available power supply is the front-stage power distribution capacity of the charging pile. Safe power value, that is, 100kW-10kW 90kW, meter power value 70kW The actual available power supply is 90kW, and the charging pile output power of 50kW is less than the maximum power of 60kW, so the charging pile output power is increased.

[0040] Increase the charging pile output power from the maximum power value of the charging pile The current power value of the charging pile and the front-stage power distribution capacity of the charging pile Meter power value, select the smaller value.

[0041] Charging pile maximum power value Current power value of charging pile: 60kW 50kW 10kW; Charging pile front-stage distribution capacity Meter power value: 100kW-10kW 70kW 20kW; 10kW 20kW, represents the maximum power value of the charging pile Current power value of the charging pile Charging pile front-stage distribution capacity Meter power value.

[0042] Add 10kW to the current power value, and the output power of the charging pile will be 60kW after adjustment.

[0043] Example 5 The charging pile adjusts the output power according to the meter power value and the difference between the front-stage power distribution capacity of the charging pile and the safe power value. Charging pile front-stage distribution capacity For the safe power value, it is necessary to further confirm whether the output power of the charging pile is the maximum power value. If the output power of the charging pile is not the maximum value, increase the output power of the charging pile.

[0044] Among them, increasing the output power of the charging pile from the front-stage distribution capacity of the charging pile Meter power value and charging pile maximum power value Select the smaller value among the current power values ​​of the charging pile.

[0045] Meter power value Charging pile front-stage distribution capacity Safety power value, if the charging pile output power is not the maximum power value, then increase the charging pile output power, increase the charging pile output power from the charging pile maximum power value The current power value of the charging pile and the front-stage power distribution capacity of the charging pile The meter power value is selected, and the front-stage distribution capacity of the charging pile The meter power value is less than the maximum power value of the charging pile Current power value of the charging pile.

[0046] Specifically, the front-stage power distribution capacity of the charging pile is 100kW, the safety power value is 10kW, the meter power value is 70kW, the charging pile output power is 30kW, and the charging pile maximum power is 60kW. The charging pile output power is the current power value of the charging pile, that is, the current power value.

[0047] The actual available power supply is the front-stage power distribution capacity of the charging pile. Safe power value, that is, 100kW-10kW 90kW, meter power value 70kW The actual power consumption is 90kW, and the output power of the charging pile is 30kW, which is less than the maximum power of the charging pile of 60kW. The output power of the charging pile is increased.

[0048] Increase the charging pile output power from the maximum power value of the charging pile The current power value of the charging pile and the front-stage power distribution capacity of the charging pile Meter power value, select the smaller value.

[0049] Charging pile maximum power value Current power value of charging pile: 60kW 30kW 30kW; Charging pile front-stage distribution capacity Meter power value: 100kW-10kW 70kW 20kW; 20kW 30kW, representing the front-stage power distribution capacity of the charging pile Meter power value Charging pile maximum power value Current power value of the charging pile.

[0050] Based on the current power value, add 20kW, and the output power of the charging pile will be 50kW after adjustment.

[0051] Example 6 The charging pile adjusts the output power according to the meter power value and the front-stage distribution capacity and safety power value of the charging pile. Charging pile front-stage distribution capacity If the safety power value is exceeded, the output power of the charging pile will be reduced.

[0052] Specifically, the front-stage power distribution capacity of the charging pile is 100kW, the safety power value is 10kW, the meter power value is 100kW, and the charging pile output power is 30kW. The charging pile output power is the current power value of the charging pile, that is, the current power value.

[0053] The actual available power supply is the front-stage power distribution capacity of the charging pile. Safe power value, that is, 100kW-10kW 90kW, meter power value 100kW The actual power consumption is 90kW, which reduces the output power of the charging pile.

[0054] Reduce power value Meter power value - (charging pile front-stage distribution capacity - safety power value), 100kW - (100kW - 10kW) 10kW.

[0055] Based on the current power value, reduce it by 10kW, and after adjustment, the output power of the charging pile is 20kW.

[0056] Example 7 The charging pile adjusts the output power according to the meter power value and the front-stage distribution capacity and safety power value of the charging pile. Charging pile front-stage distribution capacity If the power value is safe, the output power of the charging pile is reduced and the power value is reduced The charging pile outputs power and stops charging.

[0057] Specifically, the front-stage power distribution capacity of the charging pile is 100kW, the safety power value is 10kW, the meter power value is 100kW, and the charging pile output power is 10kW. The charging pile output power is the current power value of the charging pile, that is, the current power value.

[0058] The actual available power supply is the front-stage power distribution capacity of the charging pile. Safe power value, that is, 100kW-10kW 90kW, meter power value 100kW The actual power consumption is 90kW, which reduces the output power of the charging pile.

[0059] Reduce power value Meter power value - (charging pile front-stage distribution capacity - safety power value), 100kW - (100kW - 10kW) 10kW.

[0060] Reducing the power value by 10kW is equivalent to the charging pile output power being 10kW, and the charging pile stops charging.

[0061] Example 8 The present invention discloses a system capable of adjusting the output power of a charging pile in real time, comprising an acquisition module, a collection module and an adjustment module. The acquisition module is used for acquiring the front-stage power distribution capacity and the safety power value of the charging pile; the collection module is used for the charging pile to collect the power value of an electric meter in real time during the charging process; and the adjustment module is used for adjusting the output power of the charging pile according to the difference between the front-stage power distribution capacity and the safety power value of the charging pile.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for adjusting the output power of a charging pile in real time, characterized in that: include: Obtain the front-stage power distribution capacity and safety power value of the charging pile; During the charging process, the charging pile collects the meter power value in real time; The charging pile adjusts the output power according to the meter power value and the front-stage distribution capacity and safety power value of the charging pile.

2. The method for adjusting the output power of a charging pile in real time according to claim 1, characterized in that: The charging pile adjusts the output power according to the power value of the electric meter and the front-stage power distribution capacity and the safety power value of the charging pile, including: Meter power value Charging pile front-stage power distribution capacity Safety power value; Meter power value Charging pile front-stage power distribution capacity Safety power value; Meter power value Charging pile front-stage power distribution capacity Safety power value; The meter power value Charging pile front-stage power distribution capacity Safety power value, the output power of the charging pile is the current power value.

3. The method for adjusting the output power of a charging pile in real time according to claim 2, characterized in that: The meter power value Charging pile front-stage power distribution capacity The safe power value, and the charging pile output power is the maximum power value, and the charging pile output power is the current power value; The meter power value Charging pile front-stage power distribution capacity Safety power value, the output power of the charging pile is not the maximum power value, increase the output power of the charging pile.

4. The method for adjusting the output power of a charging pile in real time according to claim 3, characterized in that: The increase in the output power of the charging pile is from the front-stage power distribution capacity of the charging pile Meter power value and charging pile maximum power value Select the smaller value among the current power values ​​of the charging pile.

5. The method for adjusting the output power of a charging pile in real time according to claim 2, characterized in that: The meter power value Charging pile front-stage power distribution capacity Safety power value, reduce the output power of the charging pile.

6. The method for adjusting the output power of a charging pile in real time according to claim 5, characterized in that: The reduced power value Electric meter power value - (charging pile front-stage distribution capacity - safety power value).

7. The method for adjusting the output power of a charging pile in real time according to claim 6, characterized in that: The reduced power value The charging pile outputs power and stops charging.

8. The method for adjusting the output power of a charging pile in real time according to claim 1, characterized in that: The front-stage power distribution capacity of the charging pile is set according to the actual power distribution, and the safety power value makes the actual power consumption of the charging pile and other loads less than the front-stage power distribution capacity of the charging pile.

9. The method for adjusting the output power of a charging pile in real time according to claim 1, characterized in that: The real-time collection of the meter power value by the charging pile includes connecting the charging pile communication port to the user's incoming line main meter or the power supply gateway meter communication line to collect the meter power value.

10. A system capable of adjusting the output power of a charging pile in real time, characterized in that: include: An acquisition module is used to obtain the front-stage power distribution capacity and safety power value of the charging pile; The acquisition module is used for real-time acquisition of the meter power value by the charging pile during the charging process; The regulation module is used for the charging pile to adjust the output power according to the meter power value and the front-stage distribution capacity and safety power value of the charging pile.

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