Optical storage charging station cluster coordination control method and device considering electric power auxiliary service

Abstract

The invention relates to an optical storage charging station cluster coordination control method and device considering an electric power auxiliary service. The method comprises the steps that under the condition that an auxiliary service request is not received, power generation is conducted according to the maximum power of a photovoltaic unit, electric equipment is charged according to the rated power of a charging pile, and photovoltaic electric quantity is stored based on the real-time on-grid electricity price condition of an electricity market; under the condition that the auxiliary service request is received, the additional frequency response power of the optical storage charging station cluster is measured and calculated based on the real-time frequency of the power grid system; obtaining a total power adjustment interval of the adjustable power supply of the cluster; under the condition that the additional frequency response power belongs to the total power adjusting interval, the adjustable power supplies are called according to the calling priorities of the adjustable power supplies in sequence, and auxiliary frequency modulation is carried out on the power grid; and calling all the adjustable power supplies to carry out auxiliary frequency modulation under the condition of not belonging to the total power regulation interval. By adopting the method, frequency response can be performed on the power grid, and safe and stable operation of a power system is effectively supported.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to a method and device for coordinated control of a photovoltaic charging station cluster taking into account electric power auxiliary services. Background Art

[0002] At present, although most photovoltaic charging stations are equipped with on-site power control systems, their main function is limited to charging electric vehicles, and their huge potential in grid regulation has not been fully tapped. The existing photovoltaic charging station cluster has little interaction with the power system, does not have the function of participating in the auxiliary services of the power system, and lacks a frequency response strategy for the system. Summary of the invention

[0003] Based on this, it is necessary to provide a method and device for coordinated control of a cluster of photovoltaic storage charging stations that can actively participate in frequency response and effectively support the safe and stable operation of the power system in response to the above technical problems.

[0004] In a first aspect, the present application provides a method for coordinated control of a photovoltaic charging station cluster, comprising:

[0005] In the absence of ancillary service requests, the system generates electricity according to the maximum power of the photovoltaic unit, charges the electrical equipment according to the rated power of the charging pile, and stores the photovoltaic power through the energy storage unit based on the real-time grid-connected electricity price in the power market;

[0006] When an auxiliary service request is received, the additional frequency response power of the photovoltaic storage charging station cluster is calculated based on the real-time frequency of the power grid system;

[0007] Obtain the total power adjustment range of the adjustable power supply of the photovoltaic storage charging station cluster;

[0008] When the additional frequency response power belongs to the total power regulation range, the adjustable power sources are called in turn according to the calling priority of each adjustable power source to perform auxiliary frequency regulation on the power grid;

[0009] When the additional frequency response power does not fall within the total power regulation range, all adjustable power sources are called upon to perform auxiliary frequency regulation on the grid.

[0010] In one embodiment, power is generated according to the maximum power of the photovoltaic unit, the power-consuming device is charged according to the rated power of the charging pile, and the photovoltaic power is stored based on the energy storage unit, including:

[0011] When the real-time on-grid electricity price is not greater than the preset electricity price threshold, the photovoltaic power that is not consumed by the charging pile is stored based on the energy storage unit;

[0012] When the energy storage capacity of the energy storage unit reaches the storage limit and there is surplus photovoltaic power generated by the photovoltaic unit, the surplus photovoltaic power that cannot be absorbed and stored will be transmitted to the power grid.

[0013] In one embodiment, the method further comprises:

[0014] When the real-time on-grid electricity price is greater than the preset electricity price threshold, the stored photovoltaic power is released to the charging pile according to the rated power of the energy storage unit, and the remaining photovoltaic power not consumed by the charging pile is transmitted to the power grid.

[0015] In one embodiment, when an auxiliary service request is received, the additional frequency response power of the photovoltaic energy storage charging station cluster is calculated based on the real-time frequency of the power grid system, including:

[0016] Calculate the total additional power of primary frequency regulation and the total additional power of inertia response of the photovoltaic storage charging station cluster, and calculate the additional frequency response power based on the total additional power of primary frequency regulation and the total additional power of inertia response.

[0017] In one embodiment, the adjustable power source includes an adjustable part of the charging pile, a photovoltaic unit, and an energy storage unit, and obtaining a total power adjustment range of the adjustable power source of the photovoltaic storage charging station cluster includes:

[0018] Respectively obtain a first power regulation maximum value of the energy storage unit, a second power regulation maximum value of the adjustable part of the charging pile, and a third power regulation maximum value of the photovoltaic unit, wherein the adjustable part of the charging pile is a charging pile for which an adjustment agreement has been signed;

[0019] A first sum of the first power adjustment maximum value, the second power adjustment maximum value, and the third power adjustment maximum value is determined, and a total power adjustment interval is determined based on the first sum.

[0020] In one of the embodiments, when the additional frequency response power belongs to the total power regulation range, the adjustable power sources are called in sequence according to the calling priority of each adjustable power source to perform auxiliary frequency regulation on the power grid, including:

[0021] When the additional frequency response power is not greater than the first power regulation maximum value, controlling the energy storage unit to perform auxiliary frequency regulation on the power grid;

[0022] When the additional frequency response power is not greater than the second sum of the first power regulation maximum value and the second power regulation maximum value, controlling the energy storage unit and the adjustable part of the charging pile to perform auxiliary frequency regulation on the power grid; wherein the output power of the energy storage unit is the first regulation power maximum value;

[0023] When the additional frequency response power is greater than the sum of the first power regulation maximum value and the second power regulation maximum value, and falls within the total power regulation range, the energy storage unit, the adjustable part of the charging pile and the photovoltaic unit are controlled to perform auxiliary frequency regulation on the power grid; wherein the output power of the energy storage unit is the first regulation power maximum value, and the output power of the adjustable part of the charging pile is the second regulation power maximum value.

[0024] In one embodiment, when the additional frequency response power does not belong to the total power regulation range, all adjustable power sources are called to perform auxiliary frequency regulation on the power grid, including:

[0025] Control the energy storage unit, the adjustable part of the charging pile and the photovoltaic unit to perform auxiliary frequency modulation on the power grid; wherein the output power of the energy storage unit is the maximum value of the first adjustment power, the output power of the adjustable part of the charging pile is the maximum value of the second adjustment power, and the output power of the photovoltaic unit is the maximum value of the third adjustment power.

[0026] In a second aspect, the present application also provides a photovoltaic charging station cluster coordination control device, including:

[0027] The storage module is used to generate electricity according to the maximum power of the photovoltaic unit, charge the electrical equipment according to the rated power of the charging pile, and store the photovoltaic power through the energy storage unit based on the real-time grid-connected electricity price in the power market when no auxiliary service request is received;

[0028] A calculation module is used to calculate the additional frequency response power of the photovoltaic storage charging station cluster based on the real-time frequency of the power grid system when an auxiliary service request is received;

[0029] An acquisition module, used to obtain a total power adjustment range of an adjustable power source of a photovoltaic charging station cluster;

[0030] A first auxiliary module is used to call the adjustable power sources in turn according to the calling priority of each adjustable power source when the additional frequency response power belongs to the total power adjustment range, so as to perform auxiliary frequency regulation on the power grid;

[0031] The second auxiliary module is used to call all adjustable power sources to perform auxiliary frequency regulation on the power grid when the additional frequency response power does not belong to the total power regulation range.

[0032] In one embodiment, the acquisition module is further used to:

[0033] Respectively obtain a first power regulation maximum value of the energy storage unit, a second power regulation maximum value of the adjustable part of the charging pile, and a third power regulation maximum value of the photovoltaic unit, wherein the adjustable part of the charging pile is a charging pile for which an adjustment agreement has been signed;

[0034] A first sum of the first power adjustment maximum value, the second power adjustment maximum value, and the third power adjustment maximum value is determined, and a total power adjustment interval is determined based on the first sum.

[0035] In one embodiment, the first auxiliary module is further configured to:

[0036] When the additional frequency response power is not greater than the first power regulation maximum value, controlling the energy storage unit to perform auxiliary frequency regulation on the power grid;

[0037] When the additional frequency response power is not greater than the second sum of the first power regulation maximum value and the second power regulation maximum value, controlling the energy storage unit and the adjustable part of the charging pile to perform auxiliary frequency regulation on the power grid; wherein the output power of the energy storage unit is the first regulation power maximum value;

[0038] When the additional frequency response power is greater than the sum of the first power regulation maximum value and the second power regulation maximum value, and falls within the total power regulation range, the energy storage unit, the adjustable part of the charging pile and the photovoltaic unit are controlled to perform auxiliary frequency regulation on the power grid; wherein the output power of the energy storage unit is the first regulation power maximum value, and the output power of the adjustable part of the charging pile is the second regulation power maximum value.

[0039] The above-mentioned coordinated control method and device for the photovoltaic storage charging station cluster considering power auxiliary services, in the normal operation mode, the photovoltaic unit generates electricity at maximum power, the charging pile charges the power equipment according to the rated power, and the energy storage unit flexibly stores photovoltaic power, which can meet the daily power demand of the photovoltaic storage charging station. When the power grid needs auxiliary frequency regulation, the additional frequency response power that the photovoltaic storage charging station cluster needs to provide is calculated according to the real-time frequency of the power grid system, and the available total power adjustment range is determined. If the additional frequency response power is within the total power adjustment range, each adjustable power supply is called in turn according to the calling priority of each adjustable power supply for auxiliary frequency regulation; if it exceeds the total power adjustment range, the system will call all adjustable power supplies to meet the power grid frequency regulation requirements to the greatest extent. When receiving the auxiliary service instruction, the present application can quickly mobilize the internal resources of the photovoltaic storage charging station and actively participate in the frequency response, thereby effectively supporting the safe and stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1A schematic flow chart of a method for coordinated control of a photovoltaic storage charging station cluster considering power auxiliary services in one embodiment;

[0042] Figure 2 A schematic diagram of scheduling of a photovoltaic storage charging station cluster coordination control method considering power auxiliary services in one embodiment;

[0043] Figure 3 A control strategy diagram of a photovoltaic storage charging station cluster coordination control method considering power auxiliary services in one embodiment;

[0044] Figure 4 A reference curve diagram of primary frequency regulation droop characteristics of a photovoltaic storage charging station considering power auxiliary service in one embodiment;

[0045] Figure 5 A system architecture diagram of a photovoltaic storage charging station cluster coordination control system considering power auxiliary services in one embodiment;

[0046] Figure 6 Schematic diagram of the structure of a photovoltaic charging station cluster coordination control device considering power auxiliary services in one embodiment. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0048] As the scale of the charging infrastructure system gradually expands, the demand for the construction of a high-quality charging infrastructure system is also growing. Improving the two-way interaction between vehicles and the grid, strengthening the energy interaction between electric vehicles and the grid, improving the grid's peak-shaving and frequency-regulating, safety and emergency response capabilities, and promoting pilot demonstrations such as photovoltaic storage and charging stations have become issues that need attention. Relying on its photovoltaic storage system, the photovoltaic storage charging station can not only meet the charging needs of electric vehicles during periods of sufficient sunlight, but also store excess electricity through the energy storage system for emergency use. It can provide electric vehicles with stable charging services and ensure that the travel needs of electric vehicle users are met, and it has also effectively promoted the consumption of new energy. In addition, the photovoltaic storage charging station also has the potential to participate in grid regulation. It can actively balance the load of the distribution network and support the power balance of the distribution network. When the grid fails, it provides frequency and voltage support for the grid, thereby effectively supporting the safe and stable operation of the distribution network and the reliable power supply of the load.

[0049] However, the current application status of photovoltaic and energy storage charging stations has two major limitations: first, the main function of the charging stations is limited to charging electric vehicles, and their huge potential in grid regulation has not been fully tapped; second, current charging stations generally do not participate in electricity market transactions. In view of the widespread promotion of electricity market transactions in the future, photovoltaic and energy storage charging station clusters, as a typical model for participating in the electricity market, face the challenge of lack of cluster coordination control methods.

[0050] Based on this, Figure 1 As shown, the present application provides a method for coordinated control of a photovoltaic charging station cluster. This embodiment uses the method applied to a terminal as an example. It can be understood that the method can also be applied to a server, and can also be applied to a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. In this embodiment, the method includes the following steps:

[0051] Step 101, when no auxiliary service request is received, generating electricity according to the maximum power of the photovoltaic unit, charging the electrical equipment according to the rated power of the charging pile, and storing the photovoltaic power through the energy storage unit based on the real-time grid-connected electricity price in the power market;

[0052] Step 102, when an auxiliary service request is received, the additional frequency response power of the photovoltaic energy storage charging station cluster is calculated based on the real-time frequency of the power grid system;

[0053] Step 103, obtaining a total power adjustment range of an adjustable power source of a photovoltaic charging station cluster;

[0054] Step 104, when the additional frequency response power belongs to the total power regulation interval, the adjustable power sources are called in sequence according to the calling priority of each adjustable power source to perform auxiliary frequency regulation on the power grid;

[0055] Step 105: When the additional frequency response power does not belong to the total power regulation range, all adjustable power sources are called to perform auxiliary frequency regulation on the power grid.

[0056] For example, the photovoltaic charging station cluster provided in the present application operates in a normal operation mode when no auxiliary service request is received; and operates in a frequency modulation service mode when an auxiliary service request is received. The photovoltaic charging station cluster coordination control method provided in this embodiment can be applied to the following: Figure 2 The photovoltaic charging station cluster and cluster coordination control system shown in the figure include N photovoltaic charging stations and corresponding power station controllers. The photovoltaic charging station includes photovoltaic units, charging piles and energy storage units.

[0057] Among them, the storage mode of photovoltaic power by the energy storage unit is determined according to the real-time grid-connected electricity price in the power market. When the power grid needs the charging station cluster to assist in frequency regulation, it sends an auxiliary service request to the cluster. Calculate the additional frequency response power required at this time, and calculate the total power regulation range of the adjustable power source. The total power regulation range represents the upper limit of the power regulation capacity of each adjustable power source of the photovoltaic storage charging station cluster; when the additional frequency response power belongs to the total power regulation range, the power regulation capacity of the adjustable power source can meet the current demand, and the adjustable power source is selectively called according to the preset calling priority; when the additional frequency response power does not belong to the total power regulation range, that is, the current demand exceeds the power regulation capacity of the adjustable power source, then the power regulation capacity of each adjustable power source is fully utilized to respond to the frequency regulation auxiliary service as much as possible.

[0058] In the above-mentioned coordinated control method of the photovoltaic storage charging station cluster, in the normal operation mode, the photovoltaic unit generates electricity at maximum power, the charging pile charges the electrical equipment according to the rated power, and the energy storage unit considers the real-time on-grid electricity price in the electricity market, flexibly stores photovoltaic power, and can meet the daily electricity demand of the photovoltaic storage charging station. When the power grid needs auxiliary frequency regulation, the additional frequency response power that the photovoltaic storage charging station cluster needs to provide is calculated according to the real-time frequency of the power grid system, and the available total power adjustment range is determined. If the additional frequency response power is within the total power adjustment range, each adjustable power supply is called in turn according to the calling priority of each adjustable power supply for auxiliary frequency regulation; if it exceeds the total power adjustment range, the system will call all adjustable power supplies to meet the frequency regulation needs of the power grid to the greatest extent. When receiving the auxiliary service instruction, the present application can quickly mobilize the internal resources of the photovoltaic storage charging station and actively participate in the frequency response, thereby effectively supporting the safe and stable operation of the power system.

[0059] See also Figure 3 , Figure 3 This is the control strategy diagram of the coordinated control method of the photovoltaic storage charging station cluster in this application. In an exemplary embodiment, it is necessary to first obtain the real-time operation data of each photovoltaic storage charging station in the photovoltaic storage charging station cluster to prepare for the calculation of subsequent parameters. Including photovoltaic real-time output, energy storage real-time output, charging pile real-time power, energy storage soc, photovoltaic storage charging station grid connection status, charging pile user regulation agreement signing status, etc.

[0060] In an exemplary embodiment, electricity is generated according to the maximum power of the photovoltaic unit, electrical equipment is charged according to the rated power of the charging pile, and photovoltaic power is stored based on the energy storage unit, including: when the real-time on-grid electricity price is not greater than a preset electricity price threshold, the photovoltaic power that is not consumed by the charging pile is stored based on the energy storage unit; when the storage capacity of the energy storage unit reaches the storage upper limit and there is surplus photovoltaic power generated by the photovoltaic unit, the surplus photovoltaic power that cannot be consumed and stored is transmitted to the power grid.

[0061] In one of the embodiments, the method further includes: when the real-time on-grid electricity price is greater than a preset electricity price threshold, releasing the stored photovoltaic power to the charging pile according to the rated power of the energy storage unit, and transmitting the remaining photovoltaic power not consumed by the charging pile to the power grid.

[0062] Specifically, when the photovoltaic storage charging station cluster operates in normal operation mode, the power strategy is formulated according to the real-time grid-connected electricity price in the electricity market. The photovoltaic storage charging cluster controls the real-time power of photovoltaic, energy storage and charging piles in each photovoltaic storage charging station according to the real-time grid-connected electricity price in the electricity market.

[0063] In normal mode, the real-time operating status of each element in the power station is controlled according to the real-time grid-connected electricity price:

[0064] When the real-time on-grid electricity price Less than or equal to the preset electricity price threshold , set the solar-storage-charging cluster to work in priority consumption mode.

[0065] At this time, the photovoltaic unit is controlled to generate electricity at the maximum power and the charging pile is charged at the rated power. At the same time, when the photovoltaic power generation power is greater than the charging pile power, the energy storage unit is arranged to store as much excess photovoltaic power as possible. At this time, the city power is not actively absorbed, and only the power that cannot be consumed by photovoltaic power on site is stored. This is mainly to avoid the situation where the energy storage cannot absorb photovoltaic power after the city power is full, and the cost of receiving city power must be paid. In this way, the photovoltaic unit can store and consume as much as possible on site, reducing the amount of photovoltaic power connected to the grid. Only when it cannot be consumed on site will photovoltaic power be arranged to be connected to the grid. At this time, the real-time power instructions of the photovoltaic and charging pile units in the photovoltaic storage charging station are as follows:

[0066] Formula 1:

[0067]

[0068]

[0069] in, , is the real-time power control instruction of the photovoltaic unit and charging pile unit in the i-th photovoltaic storage charging station in the cluster, is the MPPT (maximum power point tracking) power of the photovoltaic unit in the i-th photovoltaic storage charging station, is the rated power of the charging pile in the i-th solar-storage charging station.

[0070] The real-time power instructions for energy storage are as follows:

[0071] when When the real-time output of photovoltaic power is greater than the real-time output of charging pile, and the difference between the real-time output of photovoltaic power and charging pile power is less than the rated charging power of energy storage, and the energy storage soc is within the set chargeable range, the energy storage is controlled according to the difference between the output of photovoltaic power and charging pile power:

[0072] Formula 2:

[0073]

[0074] in, is the real-time power control instruction of the energy storage unit in the i-th photovoltaic charging station in the cluster, , is the real-time power of the photovoltaic unit and charging pile unit in the i-th photovoltaic storage charging station, is the remaining power (State of Charge) percentage of the energy storage battery, is the minimum power percentage allowed for the energy storage battery. The maximum charge percentage allowed for the energy storage battery.

[0075] when When the real-time output of photovoltaic power is greater than the real-time output of charging pile, and the difference between the real-time output of photovoltaic power and charging pile is greater than the rated charging power of energy storage, and the energy storage soc is within the set chargeable range, the energy storage is controlled according to its rated charging power:

[0076] Formula 3:

[0077]

[0078] in, is the real-time power control instruction of the energy storage unit in the i-th photovoltaic charging station in the cluster, is the rated charging power of the energy storage unit in the i-th solar-storage charging station in the cluster.

[0079] when When the real-time output of photovoltaic power is less than the real-time output of charging pile, or the energy storage is fully charged, the energy storage charging power is set to 0:

[0080] Formula 4:

[0081]

[0082] in, is the real-time power control instruction of the energy storage unit in the i-th photovoltaic charging station in the cluster.

[0083] When the real-time on-grid electricity price is higher than the preset electricity price threshold, the solar-storage-charging cluster is set to operate in priority on-grid mode.

[0084] In the priority access-grid mode, the photovoltaic unit will be controlled to generate electricity at maximum power and the charging pile will be charged at rated power. At the same time, the energy storage unit will be arranged to release the stored electricity at rated power to meet the load requirements of the charging pile. If there is any excess, it will be connected to the grid as much as possible, thereby promoting the photovoltaic and energy storage unit power generation to be connected to the grid as much as possible.

[0085] At this time, the real-time power instructions of the photovoltaic and charging pile units in the photovoltaic storage charging station are as follows:

[0086] Formula 5:

[0087]

[0088]

[0089] in, , is the real-time power control instruction of the photovoltaic unit and charging pile unit in the i-th photovoltaic storage charging station in the cluster, is the MPPT power of the photovoltaic unit in the i-th photovoltaic charging station, is the rated power of the charging pile in the i-th solar-storage charging station.

[0090] For the power of energy storage, when That is, as long as the soc of the energy storage is within the set dischargeable range, the energy storage is controlled to discharge at the rated discharge power. Even if the output exceeds the power demand of the charging pile, the energy storage power can be connected to the grid. Therefore, the real-time power instruction of the energy storage is as follows:

[0091] Formula 6:

[0092]

[0093] when When the energy storage is discharged, the energy storage power is controlled to 0:

[0094] Formula 7:

[0095]

[0096] in, is the real-time power control instruction of the energy storage unit in the i-th photovoltaic charging station in the cluster, is the rated discharge power of the energy storage unit in the i-th photovoltaic charging station in the cluster.

[0097] In this embodiment, the charging station resource charging and discharging strategy coordination strategy can respond to the real-time grid-connected electricity price in the power market in real time and adjust the charging and discharging strategy of relevant resources in the power station in time.

[0098] In one embodiment, when an auxiliary service request is received, the additional frequency response power of the photovoltaic energy storage charging station cluster is calculated based on the real-time frequency of the power grid system, including:

[0099] Calculate the total additional power of primary frequency regulation and the total additional power of inertia response of the photovoltaic storage charging station cluster, and calculate the additional frequency response power based on the total additional power of primary frequency regulation and the total additional power of inertia response.

[0100] When the photovoltaic storage charging station cluster receives auxiliary service instructions from the power grid, it locks the normal mode and enters the frequency regulation service mode.

[0101] First, the additional frequency response power of the photovoltaic storage charging station cluster is calculated based on the real-time frequency of the system:

[0102] Formula 8:

[0103]

[0104] in, is the total additional frequency response power of the photovoltaic storage charging station cluster, The total additional power for the primary frequency regulation of the photovoltaic storage charging station cluster. The total power is added to the inertia response of the photovoltaic storage charging station cluster.

[0105] Total additional power of primary frequency regulation of photovoltaic storage charging station cluster The calculation is as follows:

[0106] Formula 9:

[0107]

[0108] in, , is the primary frequency modulation active frequency modulation coefficient within different frequency deviation ranges of the photovoltaic charging station, f is the real-time detected grid frequency, is the rated frequency of the power system, It is the sum of the rated power of the charging pile and energy storage of the photovoltaic charging station. The frequency corresponding to the maximum power of the primary frequency modulation power adjustment, The frequency corresponding to the maximum power under the primary frequency modulation power is adjusted. , The upper and lower frequency limits corresponding to the rated frequency of the power system plus or minus the frequency regulation dead zone.

[0109] See also Figure 4 , Figure 4 This is a reference curve of the primary frequency modulation droop characteristic of the photovoltaic storage charging station. The total additional power of the photovoltaic storage charging station cluster inertia response The calculation is as follows:

[0110] Formula 10:

[0111]

[0112] in, is the equivalent inertia time constant of the solar energy storage charging station, in seconds (s), and f is the frequency detected in real time. is the initial value of active power.

[0113] This embodiment provides a method for calculating the additional frequency response power of the frequency regulation auxiliary service of the photovoltaic storage charging station cluster, which can calculate the cluster primary frequency regulation and inertia response additional power in real time according to the system frequency, so as to respond in real time according to system requirements.

[0114] In an exemplary embodiment, the adjustable power source includes an adjustable part of the charging pile, a photovoltaic unit, and an energy storage unit, and obtaining the total power adjustment range of the adjustable power source of the photovoltaic storage charging station cluster includes:

[0115] The first power regulation maximum value of the energy storage unit, the second power regulation maximum value of the adjustable part of the charging pile and the third power regulation maximum value of the photovoltaic unit are respectively obtained, wherein the adjustable part of the charging pile is the charging pile for which an adjustment agreement has been signed; a first sum of the first power regulation maximum value, the second power regulation maximum value and the third power regulation maximum value is determined, and a total power adjustment interval is determined based on the first sum.

[0116] Specifically, the adjustable power supply of the photovoltaic storage charging station includes an energy storage unit, a photovoltaic unit, and a charging pile with a regulation agreement.

[0117] Therefore, the total power adjustment range of the photovoltaic storage charging station cluster is , and calculate the maximum adjustable power of the cluster for:

[0118] Formula 11:

[0119]

[0120] in, , , They are respectively the maximum adjustable powers of the energy storage unit, the adjustable part of the charging pile, and the photovoltaic unit in the cluster, namely the first power adjustment maximum value, the second power adjustment maximum value, and the third power adjustment maximum value.

[0121] Among them, the maximum adjustable power calculation of cluster energy storage units includes:

[0122] Maximum adjustable power of photovoltaic charging station cluster energy storage :

[0123] Formula 12:

[0124]

[0125]

[0126]

[0127] in, is the maximum adjustable power of the energy storage unit of the i-th power station in the solar-storage-charging cluster, is the real-time power of the energy storage unit of the i-th power station in the cluster, N is the total number of power stations, , are the rated charging and discharging powers of the energy storage converter in the i-th power station in the cluster, Represents the availability factor of the energy storage unit in the i-th power station in the cluster, and takes a value of 0 or 1. is the remaining power (State of Charge) percentage of the energy storage battery, is the minimum power percentage allowed for the energy storage battery. is the maximum power percentage allowed by the energy storage battery, f is the frequency detected in real time, is the rated frequency of the power system.

[0128] Among them, the calculation of the maximum adjustable power of the adjustable part of the cluster charging pile includes:

[0129] Maximum adjustable capacity of all charging piles in the solar-storage charging station cluster :

[0130] Formula 13:

[0131]

[0132]

[0133]

[0134] in, is the maximum adjustable power of the charging pile unit of the i-th power station in the solar-storage-charging cluster, is the real-time power of the charging pile unit of the i-th power station in the cluster, N is the total number of power stations, are the rated charging power of the charging pile in the i-th photovoltaic charging station in the photovoltaic charging cluster, The minimum charging power allowed by the charging pile for which the charging pile adjustment agreement has been signed. Represents the available coefficient of the energy storage unit, which takes a value of 0 or 1. f is the frequency detected in real time. is the rated frequency of the power system.

[0135] Among them, the calculation of the maximum adjustable power of cluster photovoltaic units includes:

[0136] The maximum adjustable power of all photovoltaics in the photovoltaic storage charging station cluster :

[0137] Formula 14:

[0138]

[0139]

[0140] in, is the maximum adjustable power of the photovoltaic unit of the i-th power station in the solar storage and charging cluster, is the real-time power of the photovoltaic unit of the i-th power station in the cluster, N is the total number of power stations, is the MPPT power of the photovoltaic unit of the i-th power station in the cluster, f is the frequency detected in real time, is the rated frequency of the power system.

[0141] In this embodiment, a method for calculating the power adjustable capacity of each adjustable power source in a photovoltaic storage charging station cluster is provided. The adjustable capacity of each adjustable resource can be obtained according to the operating status of the resources in the cluster, and resources can be allocated more reasonably according to actual conditions.

[0142] In an exemplary embodiment, when the additional frequency response power belongs to the total power regulation interval, the adjustable power sources are called in sequence according to the calling priority of each adjustable power source to perform auxiliary frequency regulation on the power grid, including:

[0143] When the additional frequency response power is not greater than the first power regulation maximum value, controlling the energy storage unit to perform auxiliary frequency regulation on the power grid;

[0144] When the additional frequency response power is not greater than the second sum of the first power regulation maximum value and the second power regulation maximum value, controlling the energy storage unit and the adjustable part of the charging pile to perform auxiliary frequency regulation on the power grid; wherein the output power of the energy storage unit is the first regulation power maximum value;

[0145] When the additional frequency response power is greater than the sum of the first power regulation maximum value and the second power regulation maximum value, and falls within the total power regulation range, the energy storage unit, the adjustable part of the charging pile and the photovoltaic unit are controlled to perform auxiliary frequency regulation on the power grid; wherein the output power of the energy storage unit is the first regulation power maximum value, and the output power of the adjustable part of the charging pile is the second regulation power maximum value.

[0146] Specifically, when , that is, when the regulation capacity of the energy storage unit in the cluster can already meet the additional frequency response power of the cluster, only the energy storage unit power regulation is called to respond to the frequency regulation auxiliary service. At this time, the energy storage additional regulation power of the i-th photovoltaic charging station is as follows:

[0147] Formula 15:

[0148]

[0149]

[0150] in, is the frequency modulation coefficient, the value is 1 or -1, is the maximum adjustable power of the energy storage unit of the i-th photovoltaic charging station, that is, the maximum value of the first adjustable power.

[0151] Thus, the target power instructions of the light, storage and charging units of the energy storage unit of the i-th light-storage charging station can be obtained:

[0152] Formula 16:

[0153]

[0154]

[0155]

[0156] in, , , is the target power instruction of the energy storage, charging and photovoltaic units of the i-th power station in the cluster, , , is the real-time power of the energy storage, charging, and photovoltaic units of the i-th photovoltaic storage and charging station.

[0157] when When the energy storage converter regulation capacity cannot meet the additional frequency response power of the photovoltaic charging station cluster, but the sum of the power of the energy storage and the charging pile can meet the power, the energy storage and charging pile power are adjusted simultaneously to respond to the frequency regulation auxiliary service. The energy storage is adjusted according to the maximum regulation capacity, and the charging pile is adjusted according to the actual demand. At this time, the energy storage and charging pile additional regulation power of the i-th photovoltaic charging station , as follows:

[0158] Formula 17:

[0159]

[0160]

[0161]

[0162] in, is the frequency modulation coefficient, the value is 1 or -1, , They are the maximum adjustable powers of the energy storage unit and charging pile of the i-th photovoltaic charging station, that is, the maximum value of the first adjustable power and the maximum value of the second adjustable power.

[0163] Thus, the target power instructions of the photovoltaic, energy storage, and charging units of the energy storage unit of the i-th photovoltaic charging station can be obtained:

[0164] Formula 18:

[0165]

[0166]

[0167]

[0168] in, , , is the target power instruction of the energy storage, charging and photovoltaic units of the i-th power station in the cluster, , , is the real-time power of the energy storage, charging, and photovoltaic units of the i-th photovoltaic storage and charging station.

[0169] when When the regulation capacity of the energy storage converter and the charging pile cannot meet the additional frequency response power of the photovoltaic storage charging station cluster, but the sum of all regulation capacities of the photovoltaic storage charging cluster can meet the requirement, the power regulation of the energy storage, charging pile and photovoltaic is adjusted to respond to the frequency regulation auxiliary service. The energy storage and charging pile are adjusted according to the maximum regulation capacity, and the photovoltaic is adjusted according to the actual demand. At this time, the energy storage and charging pile additional regulation power of the i-th photovoltaic storage charging station , , as follows:

[0170] Formula 19:

[0171]

[0172]

[0173]

[0174]

[0175] in, is the frequency modulation coefficient, the value is 1 or -1, , , They are the maximum adjustable powers of the energy storage unit, charging unit and photovoltaic unit of the i-th photovoltaic charging station, namely the first maximum adjustable power, the second maximum adjustable power and the third maximum adjustable power.

[0176] Thus, the target power instructions of the photovoltaic, energy storage, and charging units of the energy storage unit of the i-th photovoltaic charging station can be obtained:

[0177] Formula 20:

[0178]

[0179]

[0180]

[0181] in, , , is the target power instruction of the energy storage, charging and photovoltaic units of the i-th power station in the cluster, , , is the real-time power of the energy storage, charging, and photovoltaic units of the i-th photovoltaic storage and charging station.

[0182] In this embodiment, a method for allocating power instructions of photovoltaic energy storage charging stations in a cluster is provided to achieve reasonable allocation of the total additional power of the cluster among different power stations.

[0183] In an exemplary embodiment, when the additional frequency response power does not belong to the total power regulation interval, all adjustable power sources are called to perform auxiliary frequency regulation on the power grid, including:

[0184] Control the energy storage unit, the adjustable part of the charging pile and the photovoltaic unit to perform auxiliary frequency modulation on the power grid; wherein the output power of the energy storage unit is the maximum value of the first adjustment power, the output power of the adjustable part of the charging pile is the maximum value of the second adjustment power, and the output power of the photovoltaic unit is the maximum value of the third adjustment power.

[0185] when When the sum of all the regulation capabilities of the PV-storage-charging cluster cannot meet the additional frequency response power of the PV-storage-charging station cluster, the power regulation capabilities of energy storage, charging piles and photovoltaics are fully utilized to respond to the frequency regulation auxiliary service as much as possible. Among them, energy storage, charging piles and photovoltaics are regulated according to the maximum regulation capabilities. The energy storage and charging piles of the i-th PV-storage-charging station have additional regulation power. , , as follows:

[0186] Formula 21:

[0187]

[0188]

[0189]

[0190]

[0191] in, is the frequency modulation coefficient, the value is 1 or -1, , , are the maximum adjustable powers of the energy storage unit, charging unit and photovoltaic unit of the i-th photovoltaic charging station respectively.

[0192] Thus, the target power instructions of the photovoltaic, energy storage, and charging units of the energy storage unit of the i-th photovoltaic charging station can be obtained:

[0193] Formula 22:

[0194]

[0195]

[0196]

[0197] in, , , is the target power instruction of the energy storage, charging and photovoltaic units of the i-th power station in the cluster, , , is the real-time power of the energy storage, charging, and photovoltaic units of the i-th photovoltaic storage and charging station.

[0198] In some embodiments, see Figure 5 , Figure 5 This is a schematic diagram of the structure of the photovoltaic charging station cluster coordination control system architecture of this application.

[0199] Based on the aforementioned coordinated control method of a photovoltaic charging station cluster considering the power market, a coordinated control system of a photovoltaic charging station cluster considering the power market is proposed. The coordinated control system of the photovoltaic charging station cluster is developed based on the localized Linux operating system, and uses the MySQL database to store the relevant operating data, historical target instructions, real-time instructions and other data of each photovoltaic charging station in the cluster. At the same time, based on the basic platform interface, data interaction between the database and the upper-level business module is realized. The system business software mainly includes the following functional modules:

[0200] Power coordination control module: mainly responsible for developing business algorithms related to rapid power control of photovoltaic storage and charging clusters, including command analysis, regulation potential calculation, primary frequency regulation control additional power calculation, inertia control additional power calculation, equipment status monitoring, power allocation calculation and other functions.

[0201] Control command receiving module: connects to the power trading system and receives real-time grid-connected electricity price information issued by the system, as well as auxiliary service demand information such as frequency regulation.

[0202] Front-end communication module: In order to realize the power coordination control related business functions of the photovoltaic and energy storage charging stations, it is necessary to communicate with different photovoltaic and energy storage charging stations within the cluster, including the photovoltaic units, energy storage units, charging pile units, grid-connected circuit breakers, etc. in each photovoltaic and energy storage charging station.

[0203] Human-machine interface: realize the interaction between the photovoltaic storage charging station cluster coordination control system and the operating personnel, including power station monitoring, power station cluster control, system settings, etc.

[0204] The photovoltaic storage charging station cluster coordination control system provided in this application has the functions of real-time electricity price detection, frequency regulation auxiliary service demand monitoring, regulation potential calculation, frequency regulation additional power calculation, instruction distribution, etc.

[0205] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0206] Based on the same inventive concept, the embodiment of the present application also provides a photovoltaic charging station cluster coordination control device for implementing the photovoltaic charging station cluster coordination control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more photovoltaic charging station cluster coordination control device embodiments provided below can refer to the limitations of the photovoltaic charging station cluster coordination control method above, and will not be repeated here.

[0207] In an exemplary embodiment, Figure 6As shown, a photovoltaic charging station cluster coordination control device is provided, including: a storage module 601, a calculation module 602, an acquisition module 603, a first auxiliary module 604 and a second auxiliary module 605, wherein:

[0208] The storage module 601 is used to generate electricity according to the maximum power of the photovoltaic unit, charge the electrical equipment according to the rated power of the charging pile, and store the photovoltaic power based on the energy storage unit when no auxiliary service request is received;

[0209] The calculation module 602 is used to calculate the additional frequency response power of the photovoltaic energy storage charging station cluster based on the real-time frequency of the power grid system when an auxiliary service request is received;

[0210] An acquisition module 603 is used to acquire a total power adjustment range of an adjustable power source of a photovoltaic charging station cluster;

[0211] The first auxiliary module 604 is used to call the adjustable power sources in turn according to the calling priority of each adjustable power source to perform auxiliary frequency regulation on the power grid when the additional frequency response power belongs to the total power regulation interval;

[0212] The second auxiliary module 605 is used to call all adjustable power sources to perform auxiliary frequency regulation on the power grid when the additional frequency response power does not belong to the total power regulation range.

[0213] The storage module 601 is further used for:

[0214] When the real-time on-grid electricity price is not greater than the preset electricity price threshold, the photovoltaic power that is not consumed by the charging pile is stored based on the energy storage unit;

[0215] When the energy storage capacity of the energy storage unit reaches the storage limit and there is surplus photovoltaic power generated by the photovoltaic unit, the surplus photovoltaic power that cannot be absorbed and stored will be transmitted to the power grid.

[0216] The storage module 601 is further used for:

[0217] When the real-time on-grid electricity price is greater than the preset electricity price threshold, the stored photovoltaic power is released to the charging pile according to the rated power of the energy storage unit, and the remaining photovoltaic power not consumed by the charging pile is transmitted to the power grid.

[0218] The acquisition module 603 is further used for:

[0219] Respectively obtain a first power regulation maximum value of the energy storage unit, a second power regulation maximum value of the adjustable part of the charging pile, and a third power regulation maximum value of the photovoltaic unit, wherein the adjustable part of the charging pile is a charging pile for which an adjustment agreement has been signed;

[0220] A first sum of the first power adjustment maximum value, the second power adjustment maximum value, and the third power adjustment maximum value is determined, and a total power adjustment interval is determined based on the first sum.

[0221] The first auxiliary module 604 is further configured to:

[0222] When the additional frequency response power is not greater than the first power regulation maximum value, controlling the energy storage unit to perform auxiliary frequency regulation on the power grid;

[0223] When the additional frequency response power is not greater than the second sum of the first power regulation maximum value and the second power regulation maximum value, controlling the energy storage unit and the adjustable part of the charging pile to perform auxiliary frequency regulation on the power grid; wherein the output power of the energy storage unit is the first regulation power maximum value;

[0224] When the additional frequency response power is greater than the sum of the first power regulation maximum value and the second power regulation maximum value, and falls within the total power regulation range, the energy storage unit, the adjustable part of the charging pile and the photovoltaic unit are controlled to perform auxiliary frequency regulation on the power grid; wherein the output power of the energy storage unit is the first regulation power maximum value, and the output power of the adjustable part of the charging pile is the second regulation power maximum value.

[0225] The second auxiliary module 605 is further used for:

[0226] Control the energy storage unit, the adjustable part of the charging pile and the photovoltaic unit to perform auxiliary frequency modulation on the power grid; wherein the output power of the energy storage unit is the maximum value of the first adjustment power, the output power of the adjustable part of the charging pile is the maximum value of the second adjustment power, and the output power of the photovoltaic unit is the maximum value of the third adjustment power.

[0227] Each module in the above-mentioned photovoltaic charging station cluster coordination control device can be implemented in whole or in part by software, hardware and their combination. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the corresponding operations of each of the above modules.

[0228] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0229] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0230] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A coordinated control method for a photovoltaic charging station cluster considering power auxiliary services, characterized in that: The method comprises: In the absence of ancillary service requests, the system generates electricity according to the maximum power of the photovoltaic unit, charges the electrical equipment according to the rated power of the charging pile, and stores the photovoltaic power through the energy storage unit based on the real-time grid-connected electricity price in the power market; When receiving the auxiliary service request, the additional frequency response power of the photovoltaic charging station cluster is calculated based on the real-time frequency of the power grid system; Obtaining a total power adjustment range of an adjustable power source of the photovoltaic charging station cluster; When the additional frequency response power belongs to the total power regulation interval, calling the adjustable power sources in sequence according to the calling priority of each adjustable power source to perform auxiliary frequency regulation on the power grid; When the additional frequency response power does not belong to the total power regulation interval, all the adjustable power sources are called to perform auxiliary frequency regulation on the power grid.

2. The method according to claim 1, characterized in that The method of generating electricity according to the maximum power of the photovoltaic unit, charging the electrical equipment according to the rated power of the charging pile, and storing the photovoltaic power through the energy storage unit based on the real-time grid-connected electricity price in the power market includes: When the real-time on-grid electricity price is not greater than a preset electricity price threshold, storing the photovoltaic power that is not consumed by the charging pile based on the energy storage unit; When the storage energy of the energy storage unit reaches the storage upper limit and there is surplus photovoltaic power generated by the photovoltaic unit, the surplus photovoltaic power that cannot be absorbed and stored is transmitted to the power grid.

3. The method according to claim 2, characterized in that The method further comprises: When the real-time on-grid electricity price is greater than the preset electricity price threshold, the stored photovoltaic power is released to the charging pile according to the rated power of the energy storage unit, and the remaining photovoltaic power not consumed by the charging pile is transmitted to the power grid.

4. The method according to claim 1, characterized in that When the auxiliary service request is received, the additional frequency response power of the photovoltaic energy storage charging station cluster is calculated based on the real-time frequency of the power grid system, including: The primary frequency modulation additional total power and the inertia response additional total power of the photovoltaic storage charging station cluster are measured, and the additional frequency response power is calculated based on the primary frequency modulation additional total power and the inertia response additional total power.

5. The method according to claim 1, characterized in that The adjustable power source includes an adjustable part of the charging pile, the photovoltaic unit and the energy storage unit, and the obtaining of the total power adjustment range of the adjustable power source of the photovoltaic energy storage charging station cluster includes: Respectively obtain a first power adjustment maximum value of the energy storage unit, a second power adjustment maximum value of the adjustable part of the charging pile, and a third power adjustment maximum value of the photovoltaic unit, wherein the adjustable part of the charging pile is a charging pile for which an adjustment agreement has been signed; Determine a first sum of the first power adjustment maximum value, the second power adjustment maximum value, and the third power adjustment maximum value, and determine the total power adjustment interval based on the first sum.

6. The method according to claim 5, characterized in that When the additional frequency response power belongs to the total power adjustment interval, calling the adjustable power supplies in sequence according to the calling priority of each adjustable power supply to perform auxiliary frequency regulation on the power grid includes: When the additional frequency response power is not greater than the first power regulation maximum value, controlling the energy storage unit to perform auxiliary frequency regulation on the power grid; When the additional frequency response power is not greater than the second sum of the first power regulation maximum value and the second power regulation maximum value, controlling the energy storage unit and the adjustable part of the charging pile to perform auxiliary frequency regulation on the power grid; wherein the output power of the energy storage unit is the first regulation power maximum value; When the additional frequency response power is greater than the sum of the first power regulation maximum value and the second power regulation maximum value, and belongs to the total power regulation range, the energy storage unit, the adjustable part of the charging pile and the photovoltaic unit are controlled to perform auxiliary frequency regulation on the power grid; wherein the output power of the energy storage unit is the first regulation power maximum value, and the output power of the adjustable part of the charging pile is the second regulation power maximum value.

7. The method according to claim 5, characterized in that When the additional frequency response power does not belong to the total power regulation interval, calling all the adjustable power sources to perform auxiliary frequency regulation on the power grid includes: Control the energy storage unit, the adjustable part of the charging pile and the photovoltaic unit to perform auxiliary frequency modulation on the power grid; wherein the output power of the energy storage unit is the maximum value of the first adjustment power, the output power of the adjustable part of the charging pile is the maximum value of the second adjustment power, and the output power of the photovoltaic unit is the maximum value of the third adjustment power.

8. A photovoltaic charging station cluster coordination control device, characterized in that: The device comprises: The storage module is used to generate electricity according to the maximum power of the photovoltaic unit, charge the electrical equipment according to the rated power of the charging pile, and store the photovoltaic power through the energy storage unit based on the real-time grid-connected electricity price in the power market when no auxiliary service request is received; A calculation module, configured to calculate the additional frequency response power of the photovoltaic storage charging station cluster based on the real-time frequency of the power grid system when the auxiliary service request is received; An acquisition module, used to acquire a total power adjustment range of an adjustable power source of the photovoltaic charging station cluster; A first auxiliary module is used for calling the adjustable power sources in sequence according to the calling priority of each of the adjustable power sources to perform auxiliary frequency regulation on the power grid when the additional frequency response power belongs to the total power regulation interval; The second auxiliary module is used to call all the adjustable power sources to perform auxiliary frequency regulation on the power grid when the additional frequency response power does not belong to the total power regulation interval.

9. The photovoltaic charging station cluster coordination control device according to claim 8, characterized in that: The acquisition module is further used for: Respectively obtain a first power adjustment maximum value of the energy storage unit, a second power adjustment maximum value of the adjustable part of the charging pile, and a third power adjustment maximum value of the photovoltaic unit, wherein the adjustable part of the charging pile is a charging pile for which an adjustment agreement has been signed; Determine a first sum of the first power adjustment maximum value, the second power adjustment maximum value, and the third power adjustment maximum value, and determine the total power adjustment interval based on the first sum.

10. The photovoltaic charging station cluster coordination control device according to claim 9, characterized in that: The first auxiliary module is further used for: When the additional frequency response power is not greater than the first power regulation maximum value, controlling the energy storage unit to perform auxiliary frequency regulation on the power grid; When the additional frequency response power is not greater than the second sum of the first power regulation maximum value and the second power regulation maximum value, controlling the energy storage unit and the adjustable part of the charging pile to perform auxiliary frequency regulation on the power grid; wherein the output power of the energy storage unit is the first regulation power maximum value; When the additional frequency response power is greater than the sum of the first power regulation maximum value and the second power regulation maximum value, and belongs to the total power regulation range, the energy storage unit, the adjustable part of the charging pile and the photovoltaic unit are controlled to perform auxiliary frequency regulation on the power grid; wherein the output power of the energy storage unit is the first regulation power maximum value, and the output power of the adjustable part of the charging pile is the second regulation power maximum value.

Images