Primary frequency regulation control method and device on load side of power system

Abstract

The present invention discloses a primary frequency regulation control method and device for the load side of an electric power system. The method includes: when it is determined that the electric power system meets the frequency regulation strategy generation conditions, determining the total required load of the electric power system; generating a frequency regulation control strategy based on the total required load, wherein the frequency regulation control strategy is used to assign frequency regulation tasks to the charging station cluster in the area where the electric power system is located; assigning frequency regulation tasks to the charging station cluster according to the frequency regulation control strategy to obtain a frequency regulation task assignment result; and controlling the charging station cluster to perform frequency regulation according to the frequency regulation task assignment result to perform frequency regulation on the electric power system. The present invention solves the technical problem in the related art that the utilization rate of the response amount of the electric vehicle cluster in the area is low due to the relatively complex coordinated frequency regulation control method of the electric vehicle cluster in the electric power system and the long processing time.

Description

Technical Field

[0001] The present invention relates to the technical field of power system frequency regulation, and in particular to a primary frequency regulation control method and device on the load side of a power system. Background Art

[0002] At present, there are two main ways for electric vehicles to participate in power system frequency regulation: decentralized access mode and cluster collaborative control mode. The prior art proposes to estimate the frequency control coefficient when electric vehicle clusters participate in the primary frequency regulation of the power system based on the predicted frequency response parameters and the different frequency regulation depths between regions, and comprehensively consider the different frequency regulation depths of electric vehicle clusters between regions to obtain a collaborative control strategy based on the participation of electric vehicle clusters in primary frequency regulation between regions, so as to realize the participation of electric vehicle clusters in the primary frequency regulation of the power system.

[0003] However, when the electric vehicle cluster participates in the frequency regulation of the power system through this method, the control method and processing steps are relatively complicated, and the processor requirements are high, resulting in a long processing time; at the same time, the existing technology does not monitor the distribution network frequency of no more than 10kV and the electric vehicle cluster in real time, and proposes a control quantity allocation strategy for multiple electric vehicle clusters in the region.

[0004] With regard to the problem in the above-mentioned related technologies that the coordinated frequency regulation control method of electric vehicle clusters in the power system is relatively complex and the processing time is long, resulting in low utilization of the response capacity of electric vehicle clusters in the region, no effective solution has been proposed so far. Summary of the invention

[0005] An embodiment of the present invention provides a primary frequency regulation control method and device on the load side of an electric power system, so as to at least solve the technical problem in the related art that the utilization rate of the response quantity of the electric vehicle cluster in the area is low due to the complex coordinated frequency regulation control method of the electric vehicle cluster in the power system and the long processing time.

[0006] According to one aspect of an embodiment of the present invention, a primary frequency regulation control method for a load side of an electric power system is provided, comprising: when determining that the electric power system satisfies a condition for generating a frequency regulation strategy, determining a total load required for regulation of the electric power system, wherein the condition for generating a frequency regulation strategy comprises one of the following: a frequency of a distribution network in the electric power system exceeds a limit and a frequency regulation instruction is received, wherein the frequency exceeding a limit means that a real-time frequency deviation is not less than a frequency deviation safety upper limit or the real-time frequency deviation is not greater than a frequency deviation safety lower limit, and the real-time frequency deviation is a frequency deviation obtained from the distribution network; generating a frequency regulation control strategy based on the total load required for regulation, wherein the frequency regulation control strategy is used to perform frequency regulation task allocation on a charging station cluster in the area where the electric power system is located; performing frequency regulation task allocation on the charging station cluster according to the frequency regulation control strategy to obtain a frequency regulation task allocation result; and controlling the charging station cluster to perform frequency regulation according to the frequency regulation task allocation result to perform frequency regulation on the electric power system.

[0007] Optionally, determining the total load required to be regulated of the power system includes: determining the frequency droop coefficient of the power system; determining the total load required to be regulated based on the frequency droop coefficient, the frequency deviation safety upper limit value, and the frequency deviation safety lower limit value.

[0008] Optionally, determining the frequency droop coefficient of the power system includes: determining a maximum adjustable load and a minimum adjustable load of electric vehicles in the charging station cluster; and determining the frequency droop coefficient by a first formula according to the maximum adjustable load and the minimum adjustable load, wherein the first formula is: , represents the FM droop coefficient at time t, represents the maximum adjustable load at time t, represents the minimum adjustable load at time t, Indicates the rated frequency of the power system where the charging station cluster is located.

[0009] Optionally, the total load required to be regulated is determined according to the frequency droop coefficient, the frequency deviation safety upper limit value and the frequency deviation safety lower limit value, including: determining the frequency dead zone value of the power system; determining the frequency control amount according to the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency dead zone value and the real-time frequency deviation; determining the total load required to be regulated according to the frequency droop coefficient and the frequency control amount.

[0010] Optionally, determining the frequency control amount according to the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency modulation dead zone value, and the real-time frequency deviation includes: determining the frequency control amount by a second formula according to the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency modulation task amount, the frequency modulation dead zone value, and the real-time frequency deviation, wherein the second formula is: , represents the frequency control amount at time t, represents the frequency modulation task amount received at time t, Indicates the frequency deviation safety upper limit, Indicates the frequency deviation safety lower limit, represents the real-time frequency deviation, represents the frequency modulation dead zone value, d represents the power grid frequency modulation instruction, when d is 1, it means that the power grid frequency modulation instruction is received, and when d is 0, it means that the power grid frequency modulation instruction is not received.

[0011] Optionally, determining the total load amount to be regulated according to the frequency modulation droop coefficient and the frequency regulation amount includes: determining the total load amount to be regulated according to the frequency modulation droop coefficient and the frequency regulation amount by a third formula, wherein the third formula is: , represents the total load required to be regulated at time t, represents the FM droop coefficient at time t, Represents the frequency control amount at time t.

[0012] Optionally, a frequency regulation control strategy is generated based on the total required regulated load, including: determining a total upward regulation potential value and a total downward regulation potential value of the area where the power system is located; when it is determined that the total required regulated load is not lower than the total upward regulation potential value, determining the frequency regulation control strategy as: controlling all charging stations in the area where the power system is located to adjust the frequency according to the maximum potential value; when it is determined that the total required regulated load is lower than the total upward regulation potential value, determining the frequency regulation control strategy as: allocating frequency regulation amounts to all the charging stations in descending order according to their regulation potential values.

[0013] According to another aspect of an embodiment of the present invention, a primary frequency regulation control device on the load side of an electric power system is also provided, comprising: a determination unit, for determining the total load required to be regulated of the electric power system when determining that the electric power system satisfies a frequency regulation strategy generation condition, wherein the frequency regulation strategy generation condition comprises one of the following: the frequency of the distribution network in the electric power system exceeds the limit and a frequency regulation instruction is received, wherein the frequency exceeds the limit when the real-time frequency deviation is not less than the frequency deviation safety upper limit or the real-time frequency deviation is not greater than the frequency deviation safety lower limit, and the real-time frequency deviation is the frequency deviation obtained from the distribution network; a generation unit, for generating a frequency regulation control strategy based on the total load required to be regulated, wherein the frequency regulation control strategy is used to assign frequency regulation tasks to a charging station cluster in the area where the electric power system is located; an acquisition unit, for assigning frequency regulation tasks to the charging station cluster according to the frequency regulation control strategy to obtain a frequency regulation task assignment result; and a control unit, for controlling the charging station cluster to perform frequency regulation according to the frequency regulation task assignment result to perform frequency regulation on the electric power system.

[0014] Optionally, the determination unit includes: a first determination module, used to determine the frequency droop coefficient of the power system; and a second determination module, used to determine the total required load according to the frequency droop coefficient, the frequency deviation safety upper limit value and the frequency deviation safety lower limit value.

[0015] Optionally, the first determination module includes: a first determination submodule, used to determine the maximum adjustable load and the minimum adjustable load of the electric vehicles in the charging station cluster; a second determination submodule, used to determine the frequency modulation droop coefficient according to the maximum adjustable load and the minimum adjustable load by a first formula, wherein the first formula is: , represents the FM droop coefficient at time t, represents the maximum adjustable load at time t, represents the minimum adjustable load at time t, Indicates the rated frequency of the power system where the charging station cluster is located.

[0016] Optionally, the second determination module includes: a third determination submodule, used to determine the frequency regulation dead zone value of the power system; a fourth determination submodule, used to determine the frequency control amount according to the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency regulation dead zone value and the real-time frequency deviation; a fifth determination submodule, used to determine the total required load according to the frequency regulation droop coefficient and the frequency control amount.

[0017] Optionally, the fourth determination submodule includes: a sixth determination submodule, configured to determine the frequency control amount by a second formula according to the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency modulation task amount, the frequency modulation dead zone value and the real-time frequency deviation, wherein the second formula is: , represents the frequency control amount at time t, represents the frequency modulation task amount received at time t, Indicates the frequency deviation safety upper limit, Indicates the frequency deviation safety lower limit, represents the real-time frequency deviation, represents the frequency modulation dead zone value, d represents the power grid frequency modulation instruction, when d is 1, it means that the power grid frequency modulation instruction is received, and when d is 0, it means that the power grid frequency modulation instruction is not received.

[0018] Optionally, the fifth determination submodule includes: a seventh determination submodule, configured to determine the total load to be regulated by a third formula according to the frequency modulation droop coefficient and the frequency regulation amount, wherein the third formula is: , represents the total load required to be regulated at time t, represents the FM droop coefficient at time t, Represents the frequency control amount at time t.

[0019] Optionally, the generating unit comprises: a third determination module, used to determine the total upward regulation potential value and the total downward regulation potential value of the area where the power system is located; a fourth determination module, used to determine that when it is determined that the total required regulated load is not lower than the total upward regulation potential value, the frequency regulation control strategy is: control all charging stations in the area where the power system is located to adjust the frequency according to the maximum potential value; a fifth determination module, used to determine that when it is determined that the total required regulated load is lower than the total upward regulation potential value, the frequency regulation control strategy is: allocate frequency regulation amounts to all the charging stations in descending order according to their regulation potential values.

[0020] According to another aspect of an embodiment of the present invention, a primary frequency regulation control system on the load side of a power system is further provided, wherein the primary frequency regulation control system on the load side of the power system uses any of the primary frequency regulation control methods on the load side of the power system described above.

[0021] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is further provided, wherein the computer-readable storage medium includes a stored program, wherein the program executes any one of the above-mentioned primary frequency regulation control methods on the load side of the power system.

[0022] According to another aspect of an embodiment of the present invention, a processor is further provided, wherein the processor is used to run a program, wherein when the program is run, any one of the primary frequency regulation control methods on the load side of the power system described above is executed.

[0023] According to another aspect of an embodiment of the present invention, a computer program product is further provided, comprising computer instructions, wherein when the computer instructions are executed by a processor, any one of the above-mentioned primary frequency regulation control methods on the load side of the power system is executed.

[0024] In an embodiment of the present invention, when it is determined that the power system meets the frequency regulation strategy generation conditions, the total required regulated load of the power system is determined, wherein the frequency regulation strategy generation conditions include one of the following: the frequency of the distribution network in the power system exceeds the limit and a frequency regulation instruction is received, the frequency exceeding the limit means that the real-time frequency deviation is not less than the frequency deviation safety upper limit or the real-time frequency deviation is not greater than the frequency deviation safety lower limit, and the real-time frequency deviation is the frequency deviation obtained from the distribution network; a frequency regulation control strategy is generated based on the total required regulated load, wherein the frequency regulation control strategy is used to assign frequency regulation tasks to the charging station cluster in the area where the power system is located; frequency regulation tasks are assigned to the charging station cluster according to the frequency regulation control strategy to obtain a frequency regulation task assignment result; and the charging station cluster is controlled to perform frequency regulation according to the frequency regulation task assignment result to perform frequency regulation on the power system. Through the above technical scheme, the purpose of allocating dispatching tasks to charging station clusters according to the total dispatching load required by the power system and controlling the charging station clusters to participate in the power system frequency modulation according to the allocated dispatching tasks is achieved when the frequency of the distribution network exceeds the limit or receives the frequency control command from the superior. The technical effect of allocating dispatching tasks to charging station clusters based on the total required regulated load and enabling the charging station clusters to collaboratively participate in the frequency modulation according to the dispatching tasks to shorten the processing time is achieved, thereby solving the technical problem in the related technology that the utilization rate of the response amount of electric vehicle clusters in the region is low due to the complex collaborative frequency regulation control method of electric vehicle clusters in the power system and the long processing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 It is a hardware structure block diagram of a mobile terminal of a primary frequency modulation control method on the load side of a power system according to an embodiment of the present invention;

[0027] Figure 2 is a flow chart of a primary frequency regulation control method at a load side of a power system according to an embodiment of the present invention;

[0028] Figure 3 is a flow chart of an optional primary frequency regulation control method on the load side of a power system according to an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of a frequency modulation characteristic curve of an electric vehicle according to an embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of frequency boundaries and intervals that need to be regulated according to an embodiment of the present invention;

[0031] Figure 6 is a schematic diagram of a primary frequency regulation control device on the load side of a power system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] 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.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] As introduced in the background technology, the related technology has the disadvantage that the coordinated frequency regulation control method of electric vehicle clusters in the power system is relatively complex and the processing time is long, resulting in a low utilization rate of the response amount of electric vehicle clusters in the region. In an embodiment of the present invention, a primary frequency regulation control method and device on the load side of the power system are provided.

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] The method embodiments provided in the embodiments of the present invention can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 1 is a hardware structure block diagram of a mobile terminal of a primary frequency modulation control method on the load side of a power system according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is for illustration only and does not limit the structure of the mobile terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0037] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the primary frequency regulation control method on the load side of the power system in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the above method is implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The transmission device 106 is used to receive or send data via a network. The above-mentioned specific example of the network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0038] According to an embodiment of the present invention, a method embodiment of a primary frequency regulation control method on the load side of an electric power system is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0039] Figure 2 is a flow chart of a primary frequency regulation control method at the load side of a power system according to an embodiment of the present invention. Figure 2 As shown, the method comprises the following steps:

[0040] Step S202, when it is determined that the power system meets the frequency regulation strategy generation conditions, the total load required to be regulated of the power system is determined, wherein the frequency regulation strategy generation conditions include one of the following: the frequency of the distribution network in the power system exceeds the limit and a frequency regulation instruction is received, the frequency exceeding the limit means that the real-time frequency deviation is not less than the frequency deviation safety upper limit or the real-time frequency deviation is not greater than the frequency deviation safety lower limit, and the real-time frequency deviation is the frequency deviation obtained from the distribution network.

[0041] In the embodiment of the present invention, a 10kV distribution network is taken as an example and combined with an electric vehicle EV cluster for explanation. Of course, the technical solution provided in the embodiment of the present invention can also be applied to distribution networks of other specifications, and no specific limitation is made here.

[0042] The frequency deviation here refers to the difference between the actual frequency in the power grid and the standard frequency (usually 50Hz or 60Hz), and the real-time frequency deviation refers to the frequency deviation in the power grid at any current moment. Frequency deviation is usually caused by load changes in the power grid, unstable operation or failure of generators, etc. Frequency deviation may cause unstable operation or malfunction of power equipment in the power grid system, so it is necessary to keep the frequency within the appropriate range by adjusting the generator output or adjusting the load.

[0043] Combine the following Figure 3 The above embodiments of the present invention are described in detail. Figure 3 FIG. 1 is a flow chart of an optional primary frequency regulation control method on the load side of a power system according to an embodiment of the present invention. Figure 3 As shown, first, the operation data of the distribution network is collected in real time. For example, the real-time frequency deviation of the 10kV distribution network can be collected. , Real-time operating load of each charging station in the region , the potential for increasing the load of each charging station and downgrade potential ; Then determine whether a frequency control instruction from the superior is received or whether the frequency of the distribution network is out of limit. If a frequency control instruction from the superior is received or the frequency of the distribution network is monitored to be in danger of exceeding the limit, the total load that needs to be regulated in the power system can be calculated, and then the power system frequency can be adjusted according to the load that needs to be regulated and the frequency regulation potential of each charging station.

[0044] Specifically, the frequency of the distribution network exceeds the limit when the real-time frequency deviation of the distribution network exceeds the frequency safety upper limit or the real-time frequency deviation is lower than the frequency safety lower limit (including the case where the real-time frequency deviation is equal to the frequency safety upper limit or the frequency safety lower limit), which can be specifically expressed as: or , where Indicates the frequency deviation safety upper limit, Indicates the frequency deviation safety lower limit.

[0045] According to the above embodiment of the present invention, in the above step S202, the total load required to be regulated in the power system is determined, including: determining the frequency droop coefficient of the power system; determining the total load required to be regulated according to the frequency droop coefficient, the frequency deviation safety upper limit value and the frequency deviation safety lower limit value.

[0046] As above Figure 3 As shown, when receiving the frequency control command from the superior or monitoring that the frequency of the distribution network is in danger of exceeding the limit, the frequency regulation droop coefficient of the power system can be calculated, and then the control frequency required by the power system can be calculated based on the frequency regulation droop coefficient, and then the total load that needs to be regulated for the power system to perform frequency regulation can be calculated based on the required control frequency combined with the frequency deviation safety upper limit value and the frequency deviation safety lower limit value.

[0047] In the above embodiment of the present invention, determining the frequency droop coefficient of the power system includes: determining the maximum adjustable load and the minimum adjustable load of the electric vehicle in the charging station cluster; and determining the frequency droop coefficient by a first formula according to the maximum adjustable load and the minimum adjustable load, wherein the first formula is: , represents the FM droop coefficient at time t, represents the maximum adjustable load at time t, represents the minimum adjustable load at time t, Indicates the rated frequency of the power system where the charging station cluster is located.

[0048] Specifically, when calculating the frequency droop coefficient of the power system, the maximum adjustable load (upward potential) of the electric vehicles in the charging station cluster at time t can be used. ) and minimum adjustable load (down regulation potential ) Using the formula Calculate and obtain the frequency regulation down-regulation coefficient of the power system at time t ,in, Indicates the rated frequency of the power system where the charging station cluster is located.

[0049] The charging station cluster here refers to multiple charging stations built centrally in the same area to meet the charging needs of electric vehicles.

[0050] Furthermore, in this embodiment, the total load that needs to be regulated is determined based on the frequency droop coefficient, the frequency deviation safety upper limit value, and the frequency deviation safety lower limit value, including: determining the frequency dead zone value of the power system; determining the frequency regulation amount based on the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency dead zone value, and the real-time frequency deviation; determining the total load that needs to be regulated based on the frequency droop coefficient and the frequency regulation amount.

[0051] Combine the following Figure 4 The above embodiments of the present invention are described in detail. Figure 4 is a schematic diagram of an electric vehicle frequency modulation characteristic curve according to an embodiment of the present invention. Here, an electric vehicle EV cluster is used as an example for explanation. Figure 4 As shown, the overall process can be divided into two parts: electric vehicle discharging and electric vehicle charging.

[0052] Under the existing system framework, considering factors such as load capacity uncertainty and response lag, it is believed that load is more suitable to participate in the primary frequency regulation of the power system as an auxiliary means. In primary frequency regulation, since local control does not need to follow the frequency to adjust power very accurately, the negative feedback automatic adjustment strategy of on-site measurement is generally used for adjustment. When multiple electric vehicles and charging resources participate in frequency regulation, each resource individual can be directly monitored and issued control instructions by the substation without the participation of the main station, and combined with its own power adjustable range, the frequency regulation strategy is generated according to the primary frequency regulation characteristic curve of the electric vehicle to achieve auxiliary frequency regulation of the power system. In this way, frequency regulation is not easily constrained by the communication environment and other related data, and is more flexible.

[0053] In the embodiment of the present invention, it is considered that the electric vehicle participates in the power regulation and droop control of the power in the power grid frequency regulation, and the power-frequency curve is used to simulate the rotational inertia of the generator set, and the engineering requirements of on-site measurement and control are comprehensively considered to formulate the above Figure 4 The primary frequency modulation characteristic curve shown in the figure takes into account that the power battery of electric vehicles cannot be frequently charged and discharged due to life issues, so a frequency dead zone needs to be set. Figure 4 As shown in the figure, electric vehicles do not participate in frequency regulation and only need to charge and discharge according to user needs. In relevant regulations, the frequency deviation range of the power grid is However, due to the actual engineering process The probability of frequency offset is low, so in this embodiment, the frequency dead zone is set to Next, the frequency regulation amount required for calculating the total load to be regulated can be calculated by combining the frequency regulation dead zone value, the frequency deviation safety upper limit value and the frequency deviation safety lower limit value of the frequency dead zone.

[0054] Specifically, in this embodiment, the frequency control amount is determined according to the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency modulation dead zone value and the real-time frequency deviation, including: according to the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency modulation task amount, the frequency modulation dead zone value and the real-time frequency deviation, the frequency control amount is determined by a second formula, wherein the second formula is: , represents the frequency control amount at time t, represents the amount of frequency modulation tasks received at time t, Indicates the frequency deviation safety upper limit, Indicates the frequency deviation safety lower limit, Indicates the real-time frequency deviation, It indicates the frequency modulation dead zone value, d indicates the power grid frequency modulation command, when d is 1, it indicates that the power grid frequency modulation command is received, and when d is 0, it indicates that the power grid frequency modulation command is not received.

[0055] Combine the following Figure 5 The above embodiments of the present invention are described in detail. Figure 5 Schematic diagram of the frequency boundary and interval to be regulated according to an embodiment of the present invention. Figure 5 As shown, combined with the frequency modulation dead zone value (Here we take 0.025. It should be noted that this value can be selected according to the actual situation of each power grid), frequency deviation safety upper limit (Here we take 0.5) and the frequency deviation safety lower limit (Here we take 0.2) to divide multiple frequency deviation ranges. The shaded intervals in the figure are the intervals that require frequency control. When receiving the frequency control command from the superior, the frequency control amount at time t is the frequency control task amount at time t issued by the superior. ,here A positive value indicates that the frequency needs to be increased. When it is a negative value, it means that the frequency needs to be lowered. When the frequency control instruction from the superior is not received, the frequency control amount within different frequency deviation ranges is determined according to the frequency limit crossing situation. When performing specific calculations, the second formula provided above can be used to determine the frequency control amount within different frequency deviation ranges. The calculation steps are concise and clear using this formula, which can effectively shorten the processing time.

[0056] In the above embodiment of the present invention, determining the total load required to be regulated according to the frequency modulation droop coefficient and the frequency regulation amount includes: determining the total load required to be regulated according to the frequency modulation droop coefficient and the frequency regulation amount by a third formula, wherein the third formula is: , represents the total load that needs to be regulated at time t, represents the FM droop coefficient at time t, Represents the frequency control amount at time t.

[0057] Calculate the frequency modulation droop coefficient and frequency control amount Afterwards, we can use the formula: Calculate and get the total load required to be regulated at time t ,exist When it is a positive value, it means that the load needs to be adjusted upward. When it is a negative value, it means that the load needs to be reduced.

[0058] Step S204: generating a frequency regulation control strategy based on the total required load, wherein the frequency regulation control strategy is used to allocate frequency regulation tasks to the charging station cluster within the area where the power system is located.

[0059] After obtaining the total load that needs to be regulated, the frequency regulation tasks of the charging station cluster in the area can be allocated.

[0060] Specifically, in this embodiment, a frequency regulation control strategy is generated based on the total demand-regulated load, including: determining a total upward regulation potential value and a total downward regulation potential value of the area where the power system is located; when it is determined that the total demand-regulated load is not lower than the total upward regulation potential value, determining the frequency regulation control strategy as follows: controlling all charging stations in the area where the power system is located to adjust the frequency according to the maximum potential value; when it is determined that the total demand-regulated load is lower than the total upward regulation potential value, determining the frequency regulation control strategy as follows: allocating frequency regulation amounts to all charging stations in descending order according to their regulation potential values.

[0061] When calculating specifically, you can use the formula , Calculate the total upward adjustment potential value of the region at time t and total downgrade potential , where and are the upward adjustment potential value and downward adjustment potential value of the i-th charging station in the region at time t, is the total number of charging stations in the area.

[0062] When the frequency regulation amount is not less than the total maximum regulation potential of all charging stations in the area, all charging stations in the control area are regulated according to the maximum potential value, that is, When , the frequency regulation task of each charging station in the area is , is the total maximum regulation potential of all charging stations at time t, is the maximum regulation potential of the i-th charging station; when the frequency regulation amount is lower than the total maximum regulation potential of all charging stations in the region, the regulation tasks are allocated in descending order according to the regulation potential of each charging station until the allocated regulation task amount reaches the total required regulation load.

[0063] Step S206: Allocate frequency modulation tasks to the charging station cluster according to the frequency modulation control strategy to obtain a frequency modulation task allocation result.

[0064] In this embodiment, the frequency modulation tasks may be allocated to each charging station according to the frequency modulation control strategy generated in the above steps.

[0065] Step S208: Control the charging station cluster to perform frequency modulation according to the frequency modulation task allocation result, so as to perform frequency modulation on the power system.

[0066] In this embodiment, each charging station may be controlled to perform frequency modulation according to the allocation result of the above step S206, so as to achieve frequency modulation of the power system.

[0067] It can be seen from the above that according to the technical solution provided by the above embodiment of the present invention, when it is determined that the power system meets the frequency regulation strategy generation condition, the total load required for the power system can be determined, wherein the frequency regulation strategy generation condition includes one of the following: the frequency of the distribution network in the power system exceeds the limit and receives a frequency regulation instruction, the frequency exceeding the limit means that the real-time frequency deviation is not less than the frequency deviation safety upper limit or the real-time frequency deviation is not greater than the frequency deviation safety lower limit, and the real-time frequency deviation is the frequency deviation obtained from the distribution network; a frequency regulation control strategy is generated based on the total load required for regulation, wherein the frequency regulation control strategy is used to assign frequency regulation tasks to the charging station cluster in the area where the power system is located; frequency regulation tasks are assigned to the charging station cluster according to the frequency regulation control strategy to obtain a frequency regulation task assignment result; the charging station cluster is controlled to perform frequency regulation according to the frequency regulation task assignment result to perform frequency regulation on the power system,

[0068] Therefore, the technical solution provided according to the above embodiment of the present invention solves the technical problem in the related art that the utilization rate of the response amount of the electric vehicle cluster in the area is low due to the complex coordinated frequency regulation control method of the electric vehicle cluster in the power system and the long processing time.

[0069] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0070] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0071] According to an embodiment of the present invention, there is also provided a primary frequency regulation control device on the load side of a power system for implementing the primary frequency regulation control method on the load side of a power system. Figure 6 is a schematic diagram of a primary frequency regulation control device at the load side of a power system according to an embodiment of the present invention, such as Figure 6 As shown, the device includes: a determination unit 61, a generation unit 63, an acquisition unit 65 and a control unit 67. The primary frequency regulation control device on the load side of the power system is described in detail below.

[0072] The determination unit 61 is used to determine the total load required to be regulated in the power system when it is determined that the power system meets the frequency regulation strategy generation condition, wherein the frequency regulation strategy generation condition includes one of the following: the frequency of the distribution network in the power system exceeds the limit and a frequency regulation instruction is received, the frequency exceeding the limit means that the real-time frequency deviation is not less than the frequency deviation safety upper limit or the real-time frequency deviation is not greater than the frequency deviation safety lower limit, and the real-time frequency deviation is the frequency deviation obtained from the distribution network.

[0073] The generating unit 63 is used to generate a frequency regulation control strategy based on the total required load, wherein the frequency regulation control strategy is used to allocate frequency regulation tasks to the charging station cluster in the area where the power system is located.

[0074] The acquisition unit 65 is used to allocate frequency modulation tasks to the charging station cluster according to the frequency modulation control strategy to obtain a frequency modulation task allocation result.

[0075] The control unit 67 is used to control the charging station cluster to perform frequency modulation according to the frequency modulation task allocation result, so as to perform frequency modulation on the power system.

[0076] It should be noted here that the above-mentioned determination unit 61, generation unit 63, acquisition unit 65 and control unit 67 correspond to steps S202 to S208 in the above-mentioned embodiments, and the four units and the corresponding steps implement the same instances and application scenarios, but are not limited to the contents disclosed in the above-mentioned embodiments.

[0077] It can be seen from the above that in the scheme recorded in the above-mentioned embodiment of the present invention, the determination unit can be used to determine the total required regulated load of the power system when determining that the power system meets the frequency regulation strategy generation condition, wherein the frequency regulation strategy generation condition includes one of the following: the frequency of the distribution network in the power system exceeds the limit and receives a frequency regulation instruction, and the frequency exceeds the limit when the real-time frequency deviation is not less than the frequency deviation safety upper limit or the real-time frequency deviation is not greater than the frequency deviation safety lower limit, and the real-time frequency deviation is the frequency deviation obtained from the distribution network; the generation unit generates a frequency regulation control strategy based on the total required regulated load, wherein the frequency regulation control strategy is used to assign frequency regulation tasks to the charging station cluster in the area where the power system is located; the acquisition unit assigns frequency regulation tasks to the charging station cluster according to the frequency regulation control strategy to obtain a frequency regulation task assignment result; the control unit controls the charging station cluster to perform frequency regulation according to the frequency regulation task assignment result to perform frequency regulation on the power system.

[0078] Therefore, the technical solution provided according to the above embodiment of the present invention solves the technical problem in the related art that the utilization rate of the response amount of the electric vehicle cluster in the area is low due to the complex coordinated frequency regulation control method of the electric vehicle cluster in the power system and the long processing time.

[0079] Optionally, the determination unit includes: a first determination module, used to determine the frequency droop coefficient of the power system; a second determination module, used to determine the total load required to be regulated based on the frequency droop coefficient, the frequency deviation safety upper limit value and the frequency deviation safety lower limit value.

[0080] Optionally, the first determination module includes: a first determination submodule, used to determine the maximum adjustable load and the minimum adjustable load of the electric vehicles in the charging station cluster; a second determination submodule, used to determine the frequency modulation droop coefficient according to the maximum adjustable load and the minimum adjustable load by a first formula, wherein the first formula is: , represents the FM droop coefficient at time t, represents the maximum adjustable load at time t, represents the minimum adjustable load at time t, Indicates the rated frequency of the power system where the charging station cluster is located.

[0081] Optionally, the second determination module includes: a third determination submodule, used to determine the frequency regulation dead zone value of the power system; a fourth determination submodule, used to determine the frequency control amount according to the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency regulation dead zone value and the real-time frequency deviation; and a fifth determination submodule, used to determine the total required load control amount according to the frequency regulation droop coefficient and the frequency control amount.

[0082] Optionally, the fourth determination submodule includes: a sixth determination submodule, configured to determine the frequency control amount by a second formula according to a frequency deviation safety upper limit value, a frequency deviation safety lower limit value, a frequency modulation task amount, a frequency modulation dead zone value, and a real-time frequency deviation, wherein the second formula is: , represents the frequency control amount at time t, represents the amount of frequency modulation tasks received at time t, Indicates the frequency deviation safety upper limit, Indicates the frequency deviation safety lower limit, Indicates the real-time frequency deviation, It indicates the frequency modulation dead zone value, d indicates the power grid frequency modulation command, when d is 1, it indicates that the power grid frequency modulation command is received, and when d is 0, it indicates that the power grid frequency modulation command is not received.

[0083] Optionally, the fifth determination submodule includes: a seventh determination submodule, configured to determine the total load to be regulated by a third formula according to the frequency regulation droop coefficient and the frequency regulation amount, wherein the third formula is: , represents the total load that needs to be regulated at time t, represents the FM droop coefficient at time t, Represents the frequency control amount at time t.

[0084] Optionally, the generating unit comprises: a third determination module, used to determine the total upward regulation potential value and the total downward regulation potential value of the area where the power system is located; a fourth determination module, used to determine the frequency regulation control strategy as follows: controlling all charging stations in the area where the power system is located to adjust the frequency according to the maximum potential value when it is determined that the total required load regulation is not lower than the total upward regulation potential value; a fifth determination module, used to determine the frequency regulation control strategy as follows: allocating frequency regulation amounts to all charging stations in descending order according to their regulation potential values ​​when it is determined that the total required load regulation is lower than the total upward regulation potential value.

[0085] According to another aspect of an embodiment of the present invention, a primary frequency regulation control system on the load side of a power system is further provided, and the primary frequency regulation control system on the load side of the power system uses any of the above-mentioned primary frequency regulation control methods on the load side of the power system.

[0086] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is further provided, the computer-readable storage medium comprising a stored program, wherein the program executes any one of the above-mentioned primary frequency regulation control methods on the load side of the power system.

[0087] Optionally, in this embodiment, the computer-readable storage medium may be located in any one of the computer terminals in a computer terminal group in a computer network, or in any one of the communication devices in a communication device group.

[0088] Optionally, in this embodiment, a computer-readable storage medium is configured to store program code for executing the following steps: when it is determined that the power system satisfies the frequency regulation strategy generation conditions, determining the total load required for control of the power system, wherein the frequency regulation strategy generation conditions include one of the following: the frequency of the distribution network in the power system exceeds the limit and a frequency control instruction is received, and the frequency exceeds the limit when the real-time frequency deviation is not less than the frequency deviation safety upper limit or the real-time frequency deviation is not greater than the frequency deviation safety lower limit, and the real-time frequency deviation is the frequency deviation obtained from the distribution network; generating a frequency regulation control strategy based on the total load required for control, wherein the frequency regulation control strategy is used to assign frequency regulation tasks to the charging station cluster in the area where the power system is located; assigning frequency regulation tasks to the charging station cluster according to the frequency regulation control strategy to obtain a frequency regulation task assignment result; and controlling the charging station cluster to perform frequency regulation according to the frequency regulation task assignment result to perform frequency regulation on the power system.

[0089] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: determining the frequency droop coefficient of the power system; determining the total load that needs to be regulated based on the frequency droop coefficient, the frequency deviation safety upper limit value, and the frequency deviation safety lower limit value.

[0090] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: determining a maximum adjustable load and a minimum adjustable load of electric vehicles in a charging station cluster; determining a frequency modulation droop coefficient according to the maximum adjustable load and the minimum adjustable load by a first formula, wherein the first formula is: , represents the FM droop coefficient at time t, represents the maximum adjustable load at time t, represents the minimum adjustable load at time t, Indicates the rated frequency of the power system where the charging station cluster is located.

[0091] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: determining the frequency regulation dead zone value of the power system; determining the frequency control amount based on the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency regulation dead zone value and the real-time frequency deviation; determining the total load required to be controlled based on the frequency regulation droop coefficient and the frequency control amount.

[0092] Optionally, in this embodiment, the computer-readable storage medium is configured to store a program code for executing the following steps: determining the frequency regulation amount by a second formula according to the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency regulation task amount, the frequency regulation dead zone value, and the real-time frequency deviation, wherein the second formula is: , represents the frequency control amount at time t, represents the amount of frequency modulation tasks received at time t, Indicates the frequency deviation safety upper limit, Indicates the frequency deviation safety lower limit, Indicates the real-time frequency deviation, It indicates the frequency modulation dead zone value, d indicates the power grid frequency modulation command, when d is 1, it indicates that the power grid frequency modulation command is received, and when d is 0, it indicates that the power grid frequency modulation command is not received.

[0093] Optionally, in this embodiment, the computer-readable storage medium is configured to store a program code for executing the following steps: determining the total load to be regulated by a third formula according to the frequency modulation droop coefficient and the frequency regulation amount, wherein the third formula is: , represents the total load that needs to be regulated at time t, represents the FM droop coefficient at time t, Represents the frequency control amount at time t.

[0094] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for executing the following steps: determining a total upward regulation potential value and a total downward regulation potential value of the area where the power system is located; when it is determined that the total load required for regulation is not lower than the total upward regulation potential value, determining the frequency regulation control strategy as follows: controlling all charging stations in the area where the power system is located to adjust the frequency according to the maximum potential value; when it is determined that the total load required for regulation is lower than the total upward regulation potential value, determining the frequency regulation control strategy as follows: allocating frequency regulation amounts to all charging stations in descending order according to their regulation potential values.

[0095] According to another aspect of an embodiment of the present invention, a processor is further provided, and the processor is used to run a program, wherein when the program is run, any one of the above-mentioned primary frequency regulation control methods on the load side of the power system is executed.

[0096] According to another aspect of an embodiment of the present invention, a computer program product is provided, comprising computer instructions, which, when executed by a processor, execute any one of the above-mentioned primary frequency regulation control methods on the load side of a power system.

[0097] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0098] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0099] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0100] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0101] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0102] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0103] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A primary frequency modulation control method on the load side of a power system, characterized in that: include: When it is determined that the power system meets the frequency regulation strategy generation condition, the total load required to be regulated of the power system is determined, wherein the frequency regulation strategy generation condition includes one of the following: the frequency of the distribution network in the power system exceeds the limit and a frequency regulation instruction is received, the frequency exceeding the limit means that the real-time frequency deviation is not less than the frequency deviation safety upper limit or the real-time frequency deviation is not greater than the frequency deviation safety lower limit, the real-time frequency deviation is the frequency deviation obtained from the distribution network, and the total load required to be regulated is the total charging load required to be regulated or the total discharging load required to be regulated; Generating a frequency regulation control strategy based on the total required regulated load, wherein the frequency regulation control strategy is used to allocate frequency regulation tasks to a cluster of charging stations in the area where the power system is located; Allocating frequency modulation tasks to the charging station cluster according to the frequency modulation control strategy to obtain a frequency modulation task allocation result; Controlling the charging station cluster to perform frequency modulation according to the frequency modulation task allocation result, so as to perform frequency modulation on the power system; Generating a frequency regulation control strategy based on the total required regulated load includes: Determine the total potential upward regulation value and the total potential downward regulation value of the area where the power system is located; When it is determined that the total load to be regulated is not less than the total potential value for increasing regulation, the frequency regulation control strategy is determined as follows: controlling all charging stations in the area where the power system is located to adjust the frequency according to the maximum potential value; When it is determined that the total load to be regulated is lower than the total potential value for increasing regulation, the frequency regulation control strategy is determined as follows: allocating frequency regulation amounts to all the charging stations in descending order according to the potential values ​​for regulating all the charging stations; Determining the total load required to be regulated of the power system includes: determining a frequency droop coefficient of the power system; Determine the total load required to be regulated according to the frequency regulation droop coefficient, the frequency deviation safety upper limit value and the frequency deviation safety lower limit value; Determining the frequency droop coefficient of the power system includes: Determine the maximum adjustable load and the minimum adjustable load of the electric vehicles in the charging station cluster, wherein the maximum adjustable load is the maximum adjustable charging load or the maximum adjustable discharging load, and the minimum adjustable load is the minimum adjustable charging load or the minimum adjustable discharging load; The frequency modulation droop coefficient is determined according to the maximum adjustable load and the minimum adjustable load by a first formula, wherein the first formula is: , represents the FM droop coefficient at time t, represents the maximum adjustable load at time t, represents the minimum adjustable load at time t, Indicates the rated frequency of the power system where the charging station cluster is located.

2. The primary frequency modulation control method at the load side of the power system according to claim 1, characterized in that: Determining the total load amount to be regulated according to the frequency regulation droop coefficient, the frequency deviation safety upper limit value, and the frequency deviation safety lower limit value includes: Determining a frequency regulation dead zone value of the power system; Determine the frequency regulation amount according to the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency modulation dead zone value and the real-time frequency deviation; The total load amount to be regulated is determined according to the frequency regulation droop coefficient and the frequency regulation amount.

3. The primary frequency modulation control method at the load side of the power system according to claim 2, characterized in that: Determining the frequency regulation amount according to the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency modulation dead zone value, and the real-time frequency deviation includes: The frequency regulation amount is determined by a second formula according to the frequency deviation safety upper limit value, the frequency deviation safety lower limit value, the frequency regulation task amount, the frequency regulation dead zone value and the real-time frequency deviation, wherein the second formula is: , represents the frequency control amount at time t, represents the frequency modulation task amount received at time t, Indicates the frequency deviation safety upper limit, Indicates the frequency deviation safety lower limit, represents the real-time frequency deviation, represents the frequency modulation dead zone value, d represents the power grid frequency modulation instruction, when d is 1, it means that the power grid frequency modulation instruction is received, and when d is 0, it means that the power grid frequency modulation instruction is not received.

4. The primary frequency modulation control method at the load side of the power system according to claim 2, characterized in that: Determining the total load amount to be regulated according to the frequency regulation droop coefficient and the frequency regulation amount includes: According to the frequency modulation droop coefficient and the frequency control amount, the total load to be regulated is determined by a third formula, wherein the third formula is: , represents the total load required to be regulated at time t, represents the FM droop coefficient at time t, Represents the frequency control amount at time t.

5. A primary frequency regulation control device on the load side of a power system, characterized in that: include: A determination unit, configured to determine the total load required to be regulated of the power system when it is determined that the power system meets the frequency regulation strategy generation condition, wherein the frequency regulation strategy generation condition includes one of the following: the frequency of the distribution network in the power system exceeds the limit and a frequency regulation instruction is received, the frequency exceeding the limit means that the real-time frequency deviation is not less than the frequency deviation safety upper limit or the real-time frequency deviation is not greater than the frequency deviation safety lower limit, and the real-time frequency deviation is the frequency deviation obtained from the distribution network; A generating unit, configured to generate a frequency regulation control strategy based on the total required regulated load, wherein the frequency regulation control strategy is used to allocate frequency regulation tasks to a charging station cluster within the area where the power system is located; an acquisition unit, configured to allocate frequency modulation tasks to the charging station cluster according to the frequency modulation control strategy, and obtain a frequency modulation task allocation result; A control unit, used for controlling the charging station cluster to perform frequency modulation according to the frequency modulation task allocation result, so as to perform frequency modulation on the power system; The generating unit includes: a third determining module, which is used to determine the total upward regulation potential value and the total downward regulation potential value of the area where the power system is located; a fourth determining module, which is used to determine that when it is determined that the total required regulated load is not less than the total upward regulation potential value, the frequency regulation control strategy is: control all charging stations in the area where the power system is located to adjust the frequency according to the maximum potential value; a fifth determining module, which is used to determine that when it is determined that the total required regulated load is less than the total upward regulation potential value, the frequency regulation control strategy is: allocate frequency regulation amounts to all charging stations in order from high to low according to the regulation potential values ​​of all charging stations; The determination unit includes: a first determination module for determining a frequency droop coefficient of the power system; a second determination module for determining a total load to be regulated according to the frequency droop coefficient, a frequency deviation safety upper limit value, and a frequency deviation safety lower limit value; The first determination module includes: a first determination submodule, which is used to determine the maximum adjustable load and the minimum adjustable load of the electric vehicles in the charging station cluster; and a second determination submodule, which is used to determine the frequency modulation droop coefficient according to the maximum adjustable load and the minimum adjustable load by a first formula, wherein the first formula is: , represents the FM droop coefficient at time t, represents the maximum adjustable load at time t, represents the minimum adjustable load at time t, Indicates the rated frequency of the power system where the charging station cluster is located.

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the primary frequency regulation control method on the load side of the power system as claimed in any one of claims 1 to 4.

7. A computer program product comprising computer instructions, characterized in that When the computer instructions are executed by the processor, the primary frequency regulation control method on the load side of the power system as described in any one of claims 1 to 4 is performed.

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