Nuclear power-energy storage combined frequency regulation and peak shaving methods, devices, systems and storage media

Abstract

The present invention discloses a nuclear power - energy storage combined frequency modulation and peak shaving method, device, system and storage medium. The method includes: determining frequency modulation and peak shaving constraint conditions, frequency modulation and peak shaving cost data, and frequency modulation and peak shaving revenue data, and inputting the frequency modulation and peak shaving constraint conditions, frequency modulation and peak shaving cost data, and frequency modulation and peak shaving revenue data into a pre - created configuration model; generating a nuclear power - energy storage combined frequency modulation and peak shaving configuration scheme and a revenue value through the configuration model, and controlling an energy storage system supporting a nuclear power unit to participate in the frequency modulation and peak shaving of the power grid based on the nuclear power - energy storage combined frequency modulation and peak shaving configuration scheme and the revenue value. By generating a nuclear power - energy storage combined frequency modulation and peak shaving configuration scheme and a revenue value, the present invention ensures economic benefits based on the revenue value, and controls the energy storage system supporting the nuclear power unit to participate in the frequency modulation and peak shaving of the power grid according to the configuration scheme, so that the nuclear power unit does not directly participate in the frequency modulation and peak shaving to ensure power generation safety.

Description

Technical Field

[0001] This invention relates to the field of power grid control technology, and in particular to a method, apparatus, system and storage medium for combined frequency regulation and peak shaving of nuclear power and energy storage. Background Technology

[0002] In recent years, the development of nuclear power in my country has accelerated. In regions with rapid nuclear power development, the trend of nuclear power participating in grid frequency regulation and peak shaving has become increasingly apparent. Currently, the status quo for nuclear power plants participating in grid frequency regulation and peak shaving in China is that nuclear power plants do not participate in the secondary frequency regulation (AGC control) of the grid. Nuclear power units rely on their own frequency regulation systems to participate in the primary frequency regulation of the grid. Peak shaving is generally achieved through joint operation with pumped storage power plants or battery energy storage. However, the structure of nuclear power units dictates that they cannot frequently perform switching operations to participate in grid frequency regulation. Otherwise, it would cause problems such as metal cycle fatigue of individual components of the nuclear steam supply system and increased interaction between fuel cladding and fuel pellets, which would not only affect the safety of power generation but also lead to reduced economic benefits. Therefore, how to enable nuclear power to participate in grid frequency regulation and peak shaving while ensuring economic benefits and the safety of nuclear power generation is an urgent problem to be solved. Summary of the Invention

[0003] The main objective of this invention is to propose a method, apparatus, system, and storage medium for joint frequency regulation and peak shaving of nuclear power and energy storage, aiming to solve the problem of how to enable nuclear power to participate in the frequency regulation and peak shaving of the power grid while ensuring economic benefits and the safety of nuclear power generation.

[0004] To achieve the above objectives, the present invention provides a method for joint frequency regulation and peak shaving of nuclear power and energy storage, the method comprising the following steps:

[0005] Determine the frequency regulation and peak shaving constraints, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data, and input the frequency regulation and peak shaving constraints, the frequency regulation and peak shaving cost data, and the frequency regulation and peak shaving revenue data into a pre-created configuration model;

[0006] The configuration model generates a nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and revenue value. Based on the nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and revenue value, the energy storage system matched with the nuclear power unit is controlled to participate in the frequency regulation and peak shaving of the power grid.

[0007] Optionally, the steps for determining the frequency regulation and peak shaving constraints, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data include:

[0008] Based on the frequency regulation performance constraints, peak shaving performance constraints, primary frequency regulation performance requirements of the nuclear power unit, and energy storage constraints of the energy storage system, the frequency regulation and peak shaving constraints are determined.

[0009] The frequency regulation and peak shaving cost data are determined based on the historical operating data of the nuclear power unit and the cost, capacity and performance data of the energy storage system.

[0010] Based on the frequency regulation service parameters and the geographical location information of the nuclear power unit, the frequency regulation revenue data is determined; based on the peak shaving service parameters and the geographical location information of the nuclear power unit, the peak shaving revenue data is determined; and based on the frequency regulation revenue data and the peak shaving revenue data, the frequency regulation and peak shaving revenue data are determined.

[0011] Optionally, the frequency regulation performance constraint includes the frequency regulation dead zone range of the second energy storage device in the energy storage system, and the primary frequency regulation performance requirement constraint of the nuclear power unit includes the primary frequency regulation dead zone range of the nuclear power unit, wherein the frequency regulation dead zone range of the second energy storage device is smaller than the primary frequency regulation dead zone range of the nuclear power unit.

[0012] Optionally, the frequency regulation and peak shaving cost data includes: the initial investment of the energy storage system, the operation and maintenance cost of the energy storage system, the final residual value of the energy storage system, and the service cost and operation and maintenance cost of the nuclear power unit. The step of determining the frequency regulation and peak shaving cost data based on the historical operating data of the nuclear power unit and the cost data, capacity data, and performance data of the energy storage system includes:

[0013] Based on the historical operating data of the nuclear power unit, the service cost and operation and maintenance cost of the nuclear power unit are calculated.

[0014] Based on the cost data, capacity data, and performance data of the energy storage system, the initial investment, operation and maintenance costs, and final residual value of the energy storage system are calculated.

[0015] Optionally, the step of determining frequency regulation revenue data based on frequency regulation service parameters and the geographical location information of the nuclear power unit includes:

[0016] Based on the actual frequency modulation rate, response delay time, and frequency modulation error in the frequency modulation service parameters, determine the frequency modulation speed, primary frequency modulation response time, secondary frequency modulation response time, and frequency modulation accuracy.

[0017] The primary frequency modulation performance index is calculated based on the frequency modulation speed, the primary frequency modulation response time, and the frequency modulation accuracy; and the secondary frequency modulation performance index is calculated based on the frequency modulation speed, the secondary frequency modulation response time, and the frequency modulation accuracy.

[0018] Based on the primary frequency regulation performance indicators, the secondary frequency regulation performance indicators, the geographical location information of the nuclear power unit, and the frequency regulation service parameters including the number of primary frequency regulation times, the number of secondary frequency regulation times, the frequency regulation price, and the frequency regulation capacity, the frequency regulation revenue data is calculated.

[0019] Optionally, the steps of determining the peaking revenue data according to the peaking service parameters and the geographical location information of the nuclear power unit include:

[0020] Determine the electricity market rules according to the geographical location information of the nuclear power unit;

[0021] Calculate the peaking revenue data according to the electricity market rules, the number of peaking times, the peaking price, and the peaking capacity in the peaking service parameters.

[0022] Optionally, the energy storage system includes a first energy storage device and a second energy storage device. The steps of controlling the energy storage system supporting the nuclear power unit to participate in the frequency modulation and peaking of the power grid based on the nuclear power-energy storage combined frequency modulation and peaking configuration scheme and the revenue value include:

[0023] Based on the nuclear power-energy storage combined frequency modulation and peaking configuration scheme and the revenue value, control the nuclear power unit to operate at base load, control the first energy storage device to participate in the peaking of the power grid, and control the second energy storage device to participate in the primary frequency modulation and secondary frequency modulation of the power grid.

[0024] Optionally, after the step of controlling the second energy storage device to participate in the primary frequency modulation and secondary frequency modulation of the power grid, it includes:

[0025] Detect the frequency modulation capacity corresponding to the secondary frequency modulation, and compare the frequency modulation capacity with the configured capacity corresponding to the second energy storage device;

[0026] If the frequency modulation capacity is greater than the configured capacity, control the first energy storage device and the second energy storage device to participate in the secondary frequency modulation of the power grid simultaneously.

[0027] In addition, to achieve the above object, the present invention also provides a nuclear power-energy storage combined frequency modulation and peaking device, and the nuclear power-energy storage combined frequency modulation and peaking device includes:

[0028] A determination module, configured to determine the frequency modulation and peaking constraint conditions, the frequency modulation and peaking cost data, and the frequency modulation and peaking revenue data, and input the frequency modulation and peaking constraint conditions, the frequency modulation and peaking cost data, and the frequency modulation and peaking revenue data into a pre-created configuration model;

[0029] A control module, configured to generate a nuclear power-energy storage combined frequency modulation and peaking configuration scheme and a revenue value through the configuration model, and control the energy storage system supporting the nuclear power unit to participate in the frequency modulation and peaking of the power grid based on the nuclear power-energy storage combined frequency modulation and peaking configuration scheme and the revenue value.

[0030] Furthermore, the determination module is further configured to:

[0031] Based on the frequency regulation performance constraints, peak shaving performance constraints, primary frequency regulation performance requirements of the nuclear power unit, and energy storage constraints of the energy storage system, the frequency regulation and peak shaving constraints are determined.

[0032] The frequency regulation and peak shaving cost data are determined based on the historical operating data of the nuclear power unit and the cost, capacity and performance data of the energy storage system.

[0033] Based on the frequency regulation service parameters and the geographical location information of the nuclear power unit, the frequency regulation revenue data is determined; based on the peak shaving service parameters and the geographical location information of the nuclear power unit, the peak shaving revenue data is determined; and based on the frequency regulation revenue data and the peak shaving revenue data, the frequency regulation and peak shaving revenue data are determined.

[0034] Furthermore, the determining module is also used for:

[0035] The frequency regulation performance constraints include the frequency regulation dead zone range of the second energy storage device in the energy storage system, and the primary frequency regulation performance requirements constraints of the nuclear power unit include the primary frequency regulation dead zone range of the nuclear power unit. The frequency regulation dead zone range of the second energy storage device is smaller than the primary frequency regulation dead zone range of the nuclear power unit.

[0036] Furthermore, the determining module is also used for:

[0037] Based on the historical operating data of the nuclear power unit, the service cost and operation and maintenance cost of the nuclear power unit are calculated.

[0038] Based on the cost data, capacity data, and performance data of the energy storage system, the initial investment, operation and maintenance costs, and final residual value of the energy storage system are calculated.

[0039] Furthermore, the determining module is also used for:

[0040] Based on the actual frequency modulation rate, response delay time, and frequency modulation error in the frequency modulation service parameters, determine the frequency modulation speed, primary frequency modulation response time, secondary frequency modulation response time, and frequency modulation accuracy.

[0041] The primary frequency modulation performance index is calculated based on the frequency modulation speed, the primary frequency modulation response time, and the frequency modulation accuracy; and the secondary frequency modulation performance index is calculated based on the frequency modulation speed, the secondary frequency modulation response time, and the frequency modulation accuracy.

[0042] Based on the primary frequency regulation performance indicators, the secondary frequency regulation performance indicators, the geographical location information of the nuclear power unit, and the frequency regulation service parameters including the number of primary frequency regulation times, the number of secondary frequency regulation times, the frequency regulation price, and the frequency regulation capacity, the frequency regulation revenue data is calculated.

[0043] Furthermore, the determining module is also used for:

[0044] Electricity market rules are determined based on the geographical location information of the nuclear power units;

[0045] Based on the electricity market rules, the number of peak shaving operations, the peak shaving price, and the peak shaving capacity in the peak shaving service parameters, the peak shaving revenue data is calculated.

[0046] Furthermore, the control module is also used for:

[0047] Based on the nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and the revenue value, the nuclear power unit is controlled to operate with base load, the first energy storage device is controlled to participate in the peak shaving of the power grid, and the second energy storage device is controlled to participate in the primary and secondary frequency regulation of the power grid.

[0048] Furthermore, the control module is also used for:

[0049] The frequency regulation capacity corresponding to the secondary frequency regulation is detected, and the frequency regulation capacity is compared with the configuration capacity corresponding to the second energy storage device;

[0050] If the frequency regulation capacity is greater than the configured capacity, then the first energy storage device and the second energy storage device are controlled to participate in the secondary frequency regulation of the power grid simultaneously.

[0051] In addition, to achieve the above objectives, the present invention also provides a nuclear power-energy storage joint frequency regulation and peak shaving system, the nuclear power-energy storage joint frequency regulation and peak shaving system comprising: a memory, a processor, and a nuclear power-energy storage joint frequency regulation and peak shaving program stored in the memory and executable on the processor, wherein when the nuclear power-energy storage joint frequency regulation and peak shaving program is executed by the processor, the steps of the nuclear power-energy storage joint frequency regulation and peak shaving method as described above are implemented.

[0052] In addition, to achieve the above objectives, the present invention also provides a storage medium storing a nuclear power-energy storage joint frequency regulation and peak shaving program, wherein when the nuclear power-energy storage joint frequency regulation and peak shaving program is executed by a processor, it implements the steps of the nuclear power-energy storage joint frequency regulation and peak shaving method as described above.

[0053] The nuclear power - energy storage combined frequency regulation and peak shaving method proposed by the present invention determines the frequency regulation and peak shaving constraint conditions, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data, and inputs the frequency regulation and peak shaving constraint conditions, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data into a pre - created configuration model; generates a nuclear power - energy storage combined frequency regulation and peak shaving configuration plan and a revenue value through the configuration model, and controls the energy storage system supporting the nuclear power unit to participate in the frequency regulation and peak shaving of the power grid based on the nuclear power - energy storage combined frequency regulation and peak shaving configuration plan and the revenue value. The present invention generates a nuclear power - energy storage combined frequency regulation and peak shaving configuration plan and a revenue value based on the frequency regulation and peak shaving constraint conditions, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data, ensures economic benefits based on the revenue value, and controls the energy storage system supporting the nuclear power unit to participate in the frequency regulation and peak shaving of the power grid according to the configuration plan, so that the nuclear power unit does not directly participate in frequency regulation and peak shaving, reduces the loss caused by the nuclear power unit participating in primary frequency regulation, and ensures the safety of power generation of the nuclear power unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the device structure of the hardware operating environment involved in the embodiment scheme of the present invention;

[0055] Figure 2 It is a schematic flowchart of the first embodiment of the nuclear power - energy storage combined frequency regulation and peak shaving method of the present invention;

[0056] Figure 3 It is a schematic flowchart of the nuclear power - energy storage combined frequency regulation and peak shaving method of the present invention;

[0057] Figure 4 It is a schematic diagram of the structure of the nuclear power - energy storage combined frequency regulation and peak shaving device of the present invention.

[0058] The realization, functional features, and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0059] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0060] As Figure 1 shown, Figure 1 It is a schematic diagram of the device structure of the hardware operating environment involved in the embodiment scheme of the present invention.

[0061] The device in the embodiment of the present invention can be a PC or a server device.

[0062] As Figure 1As shown, the device may include: a processor 1001, such as a CPU; a network interface 1004; a user interface 1003; a memory 1005; and a communication bus 1002. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be high-speed RAM or non-volatile memory, such as a disk drive. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0063] Those skilled in the art will understand that Figure 1 The device structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0064] like Figure 1 As shown, the memory 1005, which serves as a computer storage medium, may include an operating system, a network communication module, a user interface module, and a nuclear power-energy storage joint frequency regulation and peak shaving program.

[0065] The operating system is a program that manages and controls portable storage devices and software resources, and supports the operation of the network communication module, user interface module, nuclear power-energy storage joint frequency regulation and peak shaving program, and other programs or software; the network communication module is used to manage and control the network interface 1002; and the user interface module is used to manage and control the user interface 1003.

[0066] exist Figure 1 In the storage device shown, the storage device calls the nuclear power-energy storage joint frequency regulation and peak shaving program stored in the memory 1005 through the processor 1001, and executes the operations in the various embodiments of the nuclear power-energy storage joint frequency regulation and peak shaving method described below.

[0067] Based on the above hardware structure, an embodiment of the nuclear power-energy storage joint frequency regulation and peak shaving method of the present invention is proposed.

[0068] Reference Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the nuclear power-energy storage combined frequency regulation and peak shaving method of the present invention. The method includes:

[0069] Step S10: Determine the frequency regulation and peak shaving constraints, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data, and input the frequency regulation and peak shaving constraints, the frequency regulation and peak shaving cost data, and the frequency regulation and peak shaving revenue data into the pre-created configuration model;

[0070] Step S20: Generate a nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and benefit value through the configuration model, and control the energy storage system matched with the nuclear power unit to participate in the frequency regulation and peak shaving of the power grid based on the nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and the benefit value.

[0071] This embodiment of the nuclear power-energy storage joint frequency regulation and peak shaving method is applied to the frequency regulation and peak shaving system of a nuclear power plant. The frequency regulation and peak shaving system of a nuclear power plant includes nuclear power units and an energy storage system. The energy storage system includes a first energy storage device and a second energy storage device. The power generated by the nuclear power plant is fed into the power grid. Therefore, the frequency regulation and peak shaving system of the nuclear power plant participates in the frequency regulation and peak shaving process of the power grid. For ease of description, the frequency regulation and peak shaving system of the nuclear power plant is used as an example. The frequency regulation and peak shaving system of the nuclear power plant determines the frequency regulation and peak shaving constraints based on the frequency regulation performance constraints, peak shaving performance constraints, primary frequency regulation performance requirements of the nuclear power units, and the energy storage system's energy capacity constraints, discharge depth constraints, and discharge rate constraints. Based on the historical operating data of the nuclear power units and the cost data, capacity data, and performance data of the energy storage system, the system determines the frequency regulation and peak shaving constraints. According to the data, frequency regulation and peak shaving cost data are determined; frequency regulation revenue data is determined based on frequency regulation service parameters and the geographical location information of nuclear power units; peak shaving revenue data is determined based on peak shaving service parameters and the geographical location information of nuclear power units; and frequency regulation and peak shaving revenue data are determined based on frequency regulation revenue data and peak shaving revenue data. The frequency regulation and peak shaving system of the nuclear power plant inputs the frequency regulation and peak shaving constraints, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data into a pre-created configuration model; the configuration model generates a nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and revenue value; and based on the nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and revenue value, the nuclear power units are controlled to operate with baseload, the first energy storage device is controlled to participate in the grid's peak shaving, and the second energy storage device is controlled to participate in the grid's primary and secondary frequency regulation.

[0072] The nuclear power - energy storage combined frequency regulation and peak shaving method of this embodiment determines the frequency regulation and peak shaving constraint conditions, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data, and inputs the frequency regulation and peak shaving constraint conditions, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data into a pre - created configuration model; generates a nuclear power - energy storage combined frequency regulation and peak shaving configuration plan and a revenue value through the configuration model, and based on the nuclear power - energy storage combined frequency regulation and peak shaving configuration plan and the revenue value, controls the energy storage system supporting the nuclear power unit to participate in the frequency regulation and peak shaving of the power grid. The present invention generates a nuclear power - energy storage combined frequency regulation and peak shaving configuration plan and a revenue value based on the frequency regulation and peak shaving constraint conditions, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data, ensures economic benefits based on the revenue value, and controls the energy storage system supporting the nuclear power unit to participate in the frequency regulation and peak shaving of the power grid according to the configuration plan, so that the nuclear power unit does not directly participate in the frequency regulation and peak shaving of the power grid, reduces the loss caused by the nuclear power unit participating in primary frequency regulation, and ensures the safety of power generation of the nuclear power unit.

[0073] The following will elaborate on each step:

[0074] Step S10, determine the frequency regulation and peak shaving constraint conditions, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data, and input the frequency regulation and peak shaving constraint conditions, the frequency regulation and peak shaving cost data, and the frequency regulation and peak shaving revenue data into a pre - created configuration model;

[0075] In this embodiment, when the frequency regulation and peak shaving system of the nuclear power plant determines that frequency regulation and peak shaving are required, according to the actual situation of the nuclear power units and energy storage systems in the current nuclear power plant, it determines the frequency regulation and peak shaving constraint conditions, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data, and inputs the frequency regulation and peak shaving constraint conditions, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data into a pre - created configuration model; it should be noted that the pre - created configuration model is created in advance and stored in the frequency regulation and peak shaving system of the nuclear power plant, and the configuration model can be expressed as follows:

[0076] NPV = O f + O p + R - I - M + F

[0077] Where, NPV represents the revenue value corresponding to the frequency regulation and peak shaving of the frequency regulation and peak shaving system of the nuclear power plant participating in the power grid. O f represents the frequency regulation revenue of the frequency regulation and peak shaving system of the nuclear power plant during the operation period of frequency regulation and peak shaving. O p represents the peak shaving revenue of the frequency regulation and peak shaving system of the nuclear power plant during the operation period of frequency regulation and peak shaving. R represents the reduced sharing cost of the nuclear power unit and the maintenance cost generated by the nuclear power unit due to primary frequency regulation. I represents the initial investment of the energy storage system. M represents the operation and maintenance cost of the energy storage system. F represents the final residual value of the energy storage system.

[0078] Specifically, the steps for determining the constraints, cost, and revenue of frequency regulation and peak shaving include:

[0079] Step a: Determine the frequency regulation and peak shaving constraints based on the frequency regulation performance constraints, peak shaving performance constraints, primary frequency regulation performance requirements of the nuclear power unit, and energy storage constraints of the energy storage system.

[0080] In this step, the nuclear power plant's frequency regulation and peak shaving system acquires and determines the frequency regulation and peak shaving constraints based on frequency regulation performance constraints, peak shaving performance constraints, primary frequency regulation performance requirements of the nuclear power units, and the energy storage system's energy capacity constraints, depth of discharge constraints, and discharge rate constraints. It is understandable that when the nuclear power plant's frequency regulation and peak shaving system participates in the grid's frequency regulation and peak shaving, the performance of the nuclear power units and energy storage system within the system, the rules governing the grid's frequency regulation and peak shaving, and the geographical location of the nuclear power plant all influence its participation in the grid's frequency regulation and peak shaving. Therefore, it is necessary to determine the frequency regulation and peak shaving constraints for the nuclear power plant's frequency regulation and peak shaving system. Specifically, the energy storage system in the nuclear power plant's frequency regulation and peak shaving system includes: a first energy storage device and a second energy storage device. The first energy storage device is an energy-type energy storage device, such as an electrochemical energy storage device, and the second energy storage device is a power-type energy storage device, such as a supercapacitor. The frequency regulation and peak shaving constraints are as follows:

[0081] Frequency regulation performance constraints refer to the performance constraints of a nuclear power plant's frequency regulation and peak shaving system in participating in grid frequency regulation. Specifically, they can be described as follows:

[0082] k fc1 >k sf1

[0083] k fc2 >k sf2

[0084] Where, k fc1 k represents the performance index of the first energy storage device in the energy storage system of a nuclear power plant's frequency regulation and peak shaving system participating in grid frequency regulation. fc2 This refers to the performance indicators of the second energy storage device in the energy storage system of a nuclear power plant's frequency regulation and peak shaving system, which participates in grid frequency regulation. sf1 k represents the frequency regulation performance threshold value for the region corresponding to the geographic location of the nuclear power plant to participate in the primary frequency regulation ancillary services of the power grid. sf2 Frequency regulation performance threshold value for the region corresponding to the geographical location of the nuclear power plant to participate in the secondary frequency regulation auxiliary service of the power grid.

[0085] Peak-shaving performance constraints refer to the performance constraints of nuclear power plant frequency regulation and peak-shaving systems participating in grid peak-shaving, which can be specifically described as follows:

[0086] C bp >C sp

[0087] T bp >T sp

[0088] Since the frequency regulation and peak shaving system of a nuclear power plant participates in grid peak shaving solely through the first energy storage device of the energy storage system, the peak shaving performance constraint applies only to the first energy storage device, where C... bp T represents the capacity of the first energy storage device in the frequency regulation and peak shaving system of a nuclear power plant participating in grid peak shaving. bp C represents the time during which the first energy storage device in the frequency regulation and peak shaving system of a nuclear power plant participates in grid peak shaving. sp T represents the capacity threshold value for the region corresponding to the geographic location of the nuclear power plant to participate in the grid's peak-shaving ancillary services. sp The time threshold value for the region corresponding to the geographical location of the nuclear power plant to participate in the grid's peak-shaving ancillary services.

[0089] The primary frequency regulation performance requirement constraint for nuclear power units refers to the constraint on the primary frequency regulation performance requirement of nuclear power units in the frequency regulation and peak shaving system of a nuclear power plant when participating in the primary frequency regulation of the power grid. Specifically, it can be expressed as follows:

[0090] k1>k vnu

[0091] f smax <f numax

[0092] f smin >f numin

[0093] Where k1 is the actual regulating speed of the nuclear power unit, k vnu f is the standard regulating speed for nuclear power units. numax f numin These are the upper and lower limits of the dead zone for primary frequency regulation of a nuclear power unit, respectively. smax f smin These represent the upper and lower limits of the frequency regulation dead zone for the second energy storage device in the energy storage system. It can be understood that the frequency regulation performance constraint includes the frequency regulation dead zone range of the second energy storage device in the energy storage system, and the primary frequency regulation performance requirement constraint for nuclear power units includes the primary frequency regulation dead zone range of the nuclear power unit. The above formula indicates that the frequency regulation dead zone range for the second energy storage device participating in frequency regulation must be smaller than the primary frequency regulation dead zone range of the nuclear power unit when participating in primary frequency regulation. This ensures that the frequency regulation and peak shaving system of the nuclear power plant only uses the second energy storage device for primary frequency regulation, without using the nuclear power unit, reducing the losses caused by the nuclear power unit participating in primary frequency regulation and ensuring the power generation safety of the nuclear power unit.

[0094] The energy storage constraints of an energy storage system include the energy storage constraints of the first energy storage device and the energy storage constraints of the second energy storage device in the energy storage system.

[0095] The energy storage constraint of the first energy storage device is described in detail as follows:

[0096]

[0097] Among them, C b The configuration capacity of the first energy storage device can be determined based on the configuration of the first energy storage device in the energy storage system of the frequency regulation and peak shaving system of the nuclear power plant. bmax P represents the maximum capacity that the first energy storage device needs to participate in under frequency regulation and peak shaving scenarios. bmax D represents the peak power that the first energy storage device needs to participate in under frequency regulation and peak shaving scenarios. b M b These are the maximum depth of discharge and discharge rate of the first energy storage device itself, respectively.

[0098] The energy storage constraint of the second energy storage device is described in detail below:

[0099]

[0100] Among them, C s The configuration capacity of the second energy storage device can be determined based on the configuration of the second energy storage device in the energy storage system of the frequency regulation and peak shaving system of the nuclear power plant. smax P represents the maximum capacity that the second energy storage device needs to participate in frequency regulation in a frequency regulation scenario. smax D represents the peak power that the second energy storage device needs to participate in frequency regulation in a frequency regulation scenario. s M s These are the maximum depth of discharge and discharge rate of the second energy storage device itself, respectively.

[0101] Step b: Determine the frequency regulation and peak shaving cost data based on the historical operating data of the nuclear power unit and the cost, capacity, and performance data of the energy storage system;

[0102] In this step, the nuclear power plant's frequency regulation and peak shaving system acquires historical operating data of the nuclear power units and cost, capacity, and performance data of the energy storage system. Based on the historical operating data of the nuclear power units and the cost, capacity, and performance data of the energy storage system, it determines the frequency regulation and peak shaving cost data. The frequency regulation and peak shaving cost data includes: the initial investment of the energy storage system, the operation and maintenance cost of the energy storage system, the final residual value of the energy storage system, and the service and operation and maintenance costs of the nuclear power units.

[0103] Further, step b includes:

[0104] Step b1: Calculate the service cost and operation and maintenance cost of the nuclear power unit based on its historical operating data.

[0105] In this step, the nuclear power plant's frequency regulation and peak shaving system acquires historical operating data of the nuclear power units. This historical operating data includes the unit's capacity, annual power generation, and maintenance costs of unit components. Based on this historical operating data, statistical estimations are performed to calculate the service cost and maintenance cost of the nuclear power units. These costs represent the reduced amortized expenses and the maintenance costs incurred due to primary frequency regulation.

[0106] Step b2: Based on the cost data, capacity data, and performance data of the energy storage system, calculate the initial investment, operation and maintenance cost, and final residual value of the energy storage system.

[0107] In this step, the nuclear power plant's frequency regulation and peak shaving system determines the cost, capacity, and performance data of the energy storage system based on the manufacturer's information. Then, based on the cost, capacity, and performance data of the energy storage system, it calculates the initial investment, operation and maintenance costs, and final residual value of the energy storage system.

[0108] Step c: Determine frequency regulation revenue data based on frequency regulation service parameters and the geographical location information of the nuclear power unit; determine peak shaving revenue data based on peak shaving service parameters and the geographical location information of the nuclear power unit; and determine frequency regulation and peak shaving revenue data based on the frequency regulation revenue data and the peak shaving revenue data.

[0109] In this step, the nuclear power plant's frequency regulation and peak shaving system determines frequency regulation revenue data based on the actual frequency regulation rate, response delay time, frequency regulation error, number of primary frequency regulation operations, number of secondary frequency regulation operations, frequency regulation price, and frequency regulation capacity in the frequency regulation service parameters, as well as the geographical location information of the nuclear power units. Based on the peak shaving service parameters, the number of peak shaving operations, peak shaving price, and peak shaving capacity, as well as the geographical location information of the nuclear power units, it calculates peak shaving revenue data. Then, based on the frequency regulation revenue data and the peak shaving revenue data, it determines the frequency regulation and peak shaving revenue data. In other words, the frequency regulation and peak shaving revenue data includes both frequency regulation revenue data and peak shaving revenue data.

[0110] Specifically, the steps for determining frequency regulation revenue data based on frequency regulation service parameters and the geographical location information of the nuclear power unit include:

[0111] Step c1: Determine the frequency modulation speed, primary frequency modulation response time, secondary frequency modulation response time, and frequency modulation accuracy based on the actual frequency modulation rate, response delay time, and frequency modulation error in the frequency modulation service parameters.

[0112] In this step, the nuclear power plant's frequency regulation and peak shaving system determines the frequency regulation speed based on the actual frequency regulation rate in the frequency regulation service parameters, determines the primary frequency regulation response time and secondary frequency regulation response time based on the response delay time, and determines the frequency regulation accuracy based on the frequency regulation error. Specifically, the process of determining the frequency regulation speed, primary frequency regulation response time, secondary frequency regulation response time, and frequency regulation accuracy is as follows:

[0113] k1 = Actual frequency modulation rate / Standard frequency modulation rate

[0114]

[0115]

[0116] k3 = 1 - Frequency modulation error / Frequency modulation allowable error

[0117] Where k1 is the frequency modulation speed, the standard frequency modulation speed is preset, and the frequency modulation speed is calculated based on the ratio of the actual frequency modulation speed to the standard frequency modulation speed; k 21 For the first frequency modulation response time, k 22 k3 is the secondary frequency modulation response time. The primary frequency modulation response time is calculated based on the response delay time and the standard response time of the primary frequency modulation (30s). The secondary frequency modulation response time is calculated based on the response delay time and the standard response time of the secondary frequency modulation (5min). k3 is the frequency modulation accuracy. The frequency modulation allowable error is set in advance. The frequency modulation accuracy is calculated based on the frequency modulation error and the frequency modulation allowable error.

[0118] Step c2: Calculate the primary frequency modulation performance index based on the frequency modulation speed, the primary frequency modulation response time, and the frequency modulation accuracy; and calculate the secondary frequency modulation performance index based on the frequency modulation speed, the secondary frequency modulation response time, and the frequency modulation accuracy.

[0119] In this step, after calculating the frequency regulation speed, primary frequency regulation response time, secondary frequency regulation response time, and frequency regulation accuracy, the nuclear power plant's frequency regulation and peak shaving system calculates the primary frequency regulation performance indicators based on these parameters, and then calculates the secondary frequency regulation performance indicators based on the same parameters. The specific process for calculating the primary and secondary frequency regulation performance indicators is as follows:

[0120] k f1 =(2*k1+k 21 +k3)*0.25

[0121] k f2 =(2*k1+k 22 +k3)*0.25

[0122] Where, k f1 k is a primary frequency modulation performance indicator. f2Here, k1 represents the frequency modulation performance index, and k is the adjustment speed. 21 For the first frequency modulation response time, k 22 Let k be the secondary frequency modulation response time and k3 be the adjustment accuracy. Based on the above formula, the performance indicators of the primary and secondary frequency modulation are calculated respectively.

[0123] Step c3: Calculate frequency regulation revenue data based on the primary frequency regulation performance indicators, the secondary frequency regulation performance indicators, the geographical location information of the nuclear power unit, and the primary frequency regulation frequency, secondary frequency regulation frequency, frequency regulation price, and frequency regulation capacity in the frequency regulation service parameters.

[0124] In this step, after calculating the primary and secondary frequency regulation performance indicators, the nuclear power plant's frequency regulation and peak shaving system calculates the frequency regulation revenue data based on these indicators, the nuclear power unit's geographical location information, and the frequency regulation service parameters including the number of primary and secondary frequency regulation operations, the frequency regulation price, and the frequency regulation capacity. The specific process for calculating the frequency regulation revenue data is as follows:

[0125]

[0126] Among them, O f For frequency modulation revenue data, k f1 k is a primary frequency modulation performance indicator. f2 For secondary frequency modulation performance indicators, f i (x, y) is the revenue function for the i-th frequency regulation, where x and y are the service price and regulation capacity for this frequency regulation, respectively. The regulation capacity includes the total capacity of the nuclear power unit, the first energy storage device, and the second energy storage device, f. i (x,y) is determined according to the electricity market rules of the region corresponding to the geographical location information of the nuclear power unit. It is generally a piecewise function or a linear function. N1 is the number of primary frequency regulation times within the cycle in which the nuclear power plant's frequency regulation and peak shaving system participates in grid frequency regulation, and N2 is the number of secondary frequency regulation times within the cycle in which the nuclear power plant's frequency regulation and peak shaving system participates in grid frequency regulation.

[0127] Specifically, the steps for determining peak-shaving revenue data based on peak-shaving service parameters and the geographical location information of the nuclear power unit include:

[0128] Step c4: Determine the electricity market rules based on the geographical location information of the nuclear power unit;

[0129] Step c5: Calculate peak shaving revenue data based on the electricity market rules, the peak shaving frequency, peak shaving price, and peak shaving capacity in the peak shaving service parameters.

[0130] In steps c4 and c5, the nuclear power plant's frequency regulation and peak shaving system determines the electricity market rules based on the geographical location information of the nuclear power units, and calculates the peak shaving revenue data based on the electricity market rules, peak shaving frequency, peak shaving price, and peak shaving capacity in the peak shaving service parameters. The specific process for calculating the peak shaving revenue data is as follows:

[0131]

[0132] Among them, G j (l,p) is the revenue function for the j-th peak shaving, where l and p are the peak shaving price and peak shaving capacity for this operation, respectively, and the peak shaving capacity is the capacity of the first energy storage device, G. j (l,p) will be expressed differently depending on the local electricity market rules corresponding to the geographical location of the nuclear power plant. It is generally a piecewise function or a linear function, where M is the number of times the nuclear power plant's frequency regulation and peak regulation system participates in grid peak regulation within the cycle.

[0133] Step S20: Generate a nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and benefit value through the configuration model, and control the energy storage system matched with the nuclear power unit to participate in the frequency regulation and peak shaving of the power grid based on the nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and the benefit value.

[0134] In this embodiment, the frequency regulation and peak shaving system of the nuclear power plant calculates the revenue value and the corresponding nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme based on the frequency regulation and peak shaving constraints, frequency regulation and peak shaving cost data and frequency regulation and peak shaving revenue data through the configuration model. Based on the nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and revenue value, the energy storage system matched with the nuclear power unit is controlled to participate in the frequency regulation and peak shaving of the power grid.

[0135] In a feasible embodiment, the configuration model optimizes its own capacity based on frequency regulation and peak shaving constraints, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data, with the objective of maximizing the economic benefits of the nuclear power plant's frequency regulation and peak shaving system participating in the grid's frequency regulation and peak shaving. The objective function corresponding to the optimized configuration model can be expressed as follows:

[0136] max NPV = max(O f +O p +RI-M+F)

[0137] Wherein, NPV represents the revenue value corresponding to the nuclear power plant's frequency regulation and peak shaving system participating in the grid's frequency regulation and peak shaving, O f This represents the frequency regulation revenue of a nuclear power plant's frequency regulation and peak shaving system during its operating cycle. pR represents the peak-shaving revenue of the nuclear power plant's frequency regulation and peak-shaving system during the frequency regulation and peak-shaving operation cycle; R represents the reduced amortized costs of the nuclear power unit and the maintenance costs of the nuclear power unit due to one frequency regulation; I represents the initial investment of the energy storage system; M represents the operation and maintenance costs of the energy storage system; and F represents the final residual value of the energy storage system.

[0138] The frequency regulation and peak shaving system of a nuclear power plant obtains the maximum benefit value of the optimized configuration scheme and the corresponding nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme by solving the above objective function through a configuration model and intelligent algorithm. Based on the maximum benefit value and the corresponding nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme, the energy storage system matched with the nuclear power unit is controlled to participate in the frequency regulation and peak shaving of the power grid. The intelligent algorithm can be an optimization algorithm such as particle swarm optimization.

[0139] Specifically, based on the nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and the revenue value, the steps for controlling the nuclear power unit and energy storage system to participate in the frequency regulation and peak shaving of the power grid include:

[0140] Step d: Based on the nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and the revenue value, control the nuclear power unit to operate with base load, control the first energy storage device to participate in the peak shaving of the power grid, and control the second energy storage device to participate in the primary and secondary frequency regulation of the power grid.

[0141] In this step, the energy storage system includes a first energy storage device and a second energy storage device. The first energy storage device can be an energy-type energy storage device such as a battery, and the second energy storage device can be a power-type energy storage device such as a supercapacitor or flywheel energy storage. The frequency regulation and peak shaving system of the nuclear power plant is based on the nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and revenue value. It controls the nuclear power unit to operate with base load, controls the first energy storage device to participate in the peak shaving of the power grid, and controls the second energy storage device to participate in the primary and secondary frequency regulation of the power grid.

[0142] Further, after the step of controlling the second energy storage device to participate in the primary and secondary frequency regulation of the power grid, the following steps are included:

[0143] Step e: Detect the frequency regulation capacity corresponding to the secondary frequency regulation, and compare the frequency regulation capacity with the configuration capacity corresponding to the second energy storage device;

[0144] Step f: If the frequency regulation capacity is greater than the configured capacity, then control the first energy storage device and the second energy storage device to participate in the secondary frequency regulation of the power grid simultaneously.

[0145] In steps e to f, under normal circumstances, the frequency and peak regulation system of the nuclear power plant can participate in the primary frequency regulation and secondary frequency regulation of the power grid only through the second energy storage device. However, in some special cases, such as when the power grid suffers a large disturbance, the frequency regulation capacity corresponding to the secondary frequency regulation may increase significantly. At this time, after the frequency and peak regulation system of the nuclear power plant controls the second energy storage device to participate in the primary frequency regulation of the power grid, it detects the frequency regulation capacity corresponding to the secondary frequency regulation, and compares the frequency regulation capacity with the configured capacity corresponding to the second energy storage device. If the frequency regulation capacity is greater than the configured capacity, it means that the second energy storage device alone cannot participate in the secondary frequency regulation of the power grid, and then it is necessary to control the first energy storage device and the second energy storage device to participate in the secondary frequency regulation of the power grid at the same time; if the frequency regulation capacity is not greater than the configured capacity, the second energy storage device is still controlled to participate in the secondary frequency regulation of the power grid, and the first energy storage device is not required to participate.

[0146] The frequency and peak regulation system of the nuclear power plant in this embodiment determines the frequency and peak regulation constraint conditions according to the frequency regulation performance constraint, peak regulation performance constraint, primary frequency regulation performance requirement constraint of the nuclear power unit, as well as the power constraint, depth of discharge constraint and discharge rate constraint of the energy storage system; determines the frequency and peak regulation cost data according to the historical operation data of the nuclear power unit and the cost data, capacity data and performance data of the energy storage system; determines the frequency regulation revenue data according to the frequency regulation service parameters and the geographical location information of the nuclear power unit, determines the peak regulation revenue data according to the peak regulation service parameters and the geographical location information of the nuclear power unit, and determines the frequency and peak regulation revenue data according to the frequency regulation revenue data and the peak regulation revenue data; the frequency and peak regulation system of the nuclear power plant inputs the frequency and peak regulation constraint conditions, frequency and peak regulation cost data and frequency and peak regulation revenue data into the pre-created configuration model; generates a nuclear power-energy storage combined frequency and peak regulation configuration plan and a revenue value through the configuration model, and based on the nuclear power-energy storage combined frequency and peak regulation configuration plan and the revenue value, controls the nuclear power unit to operate at the base load, controls the first energy storage device to participate in the peak regulation of the power grid, and controls the second energy storage device to participate in the primary frequency regulation and secondary frequency regulation of the power grid. Generating a nuclear power-energy storage combined frequency and peak regulation configuration plan and a revenue value based on the frequency and peak regulation constraint conditions, frequency and peak regulation cost data and frequency and peak regulation revenue data, ensuring economic benefits based on the revenue value, and controlling the energy storage system supporting the nuclear power unit to participate in the frequency and peak regulation of the power grid according to the configuration plan, so that the nuclear power unit does not directly participate in the frequency and peak regulation, reducing the loss caused by the primary frequency regulation of the nuclear power unit itself, and ensuring the safety of the nuclear power unit's power generation.

[0147] In specific implementation, such as Figure 3As shown in the figure, after the frequency and peak regulation system of the nuclear power plant determines the frequency and peak regulation constraint conditions, the frequency and peak regulation cost data, and the frequency and peak regulation revenue data, it inputs the frequency and peak regulation constraint conditions, the frequency and peak regulation cost data, and the frequency and peak regulation revenue data into a pre-created configuration model. Through the configuration model, based on the frequency and peak regulation constraint conditions, the frequency and peak regulation cost data, and the frequency and peak regulation revenue data, and with the goal of maximizing the economic benefit of the frequency and peak regulation of the nuclear power plant's frequency and peak regulation system participating in the power grid, it optimizes its own capacity to obtain an optimized configuration model. The objective function corresponding to the optimized configuration model is solved based on an intelligent algorithm (such as the particle swarm algorithm) to obtain the maximum revenue value of the optimized configuration plan and the nuclear power-energy storage combined frequency and peak regulation configuration plan corresponding to the maximum revenue value. Based on the maximum revenue value and the corresponding nuclear power-energy storage combined frequency and peak regulation configuration plan, it controls the energy storage system in the nuclear power unit to participate in the frequency and peak regulation of the power grid. On the basis of ensuring economic benefits, according to the configuration plan, it controls the energy storage system supporting the nuclear power unit to participate in the frequency and peak regulation of the power grid, so that the nuclear power unit does not directly participate in the frequency and peak regulation, reducing the loss caused by the primary frequency regulation of the nuclear power unit itself and ensuring the safety of the nuclear power unit's power generation.

[0148] The present invention also provides a nuclear power-energy storage combined frequency and peak regulation device. The nuclear power-energy storage combined frequency and peak regulation device of the present invention includes:

[0149] A determination module, configured to determine the frequency and peak regulation constraint conditions, the frequency and peak regulation cost data, and the frequency and peak regulation revenue data, and input the frequency and peak regulation constraint conditions, the frequency and peak regulation cost data, and the frequency and peak regulation revenue data into a pre-created configuration model;

[0150] A control module, configured to generate a nuclear power-energy storage combined frequency and peak regulation configuration plan and a revenue value through the configuration model, and control the nuclear power unit and the energy storage system to participate in the frequency and peak regulation of the power grid based on the nuclear power-energy storage combined frequency and peak regulation configuration plan and the revenue value.

[0151] Further, the determination module is also configured to:

[0152] Determine the frequency and peak regulation constraint conditions according to the frequency performance constraint, the peak regulation performance constraint, the primary frequency regulation performance requirement constraint of the nuclear power unit, and the energy storage constraint of the energy storage system;

[0153] Determine the frequency and peak regulation cost data according to the historical operation data of the nuclear power unit and the cost data, capacity data, and performance data of the energy storage system;

[0154] Determine the frequency revenue data according to the frequency service parameters and the geographical location information of the nuclear power unit, determine the peak regulation revenue data according to the peak regulation service parameters and the geographical location information of the nuclear power unit, and determine the frequency and peak regulation revenue data according to the frequency revenue data and the peak regulation revenue data.

[0155] Furthermore, the determining module is also used for:

[0156] The frequency regulation performance constraints include the frequency regulation dead zone range of the second energy storage device in the energy storage system, and the primary frequency regulation performance requirements constraints of the nuclear power unit include the primary frequency regulation dead zone range of the nuclear power unit. The frequency regulation dead zone range of the second energy storage device is smaller than the primary frequency regulation dead zone range of the nuclear power unit.

[0157] Furthermore, the determining module is also used for:

[0158] Based on the historical operating data of the nuclear power unit, the service cost and operation and maintenance cost of the nuclear power unit are calculated.

[0159] Based on the cost data, capacity data, and performance data of the energy storage system, the initial investment, operation and maintenance costs, and final residual value of the energy storage system are calculated.

[0160] Furthermore, the determining module is also used for:

[0161] Based on the actual frequency modulation rate, response delay time, and frequency modulation error in the frequency modulation service parameters, determine the frequency modulation speed, primary frequency modulation response time, secondary frequency modulation response time, and frequency modulation accuracy.

[0162] The primary frequency modulation performance index is calculated based on the frequency modulation speed, the primary frequency modulation response time, and the frequency modulation accuracy; and the secondary frequency modulation performance index is calculated based on the frequency modulation speed, the secondary frequency modulation response time, and the frequency modulation accuracy.

[0163] Based on the primary frequency regulation performance indicators, the secondary frequency regulation performance indicators, the geographical location information of the nuclear power unit, and the frequency regulation service parameters including the number of primary frequency regulation times, the number of secondary frequency regulation times, the frequency regulation price, and the frequency regulation capacity, the frequency regulation revenue data is calculated.

[0164] Furthermore, the determining module is also used for:

[0165] Electricity market rules are determined based on the geographical location information of the nuclear power units;

[0166] Based on the electricity market rules, the number of peak shaving operations, the peak shaving price, and the peak shaving capacity in the peak shaving service parameters, the peak shaving revenue data is calculated.

[0167] Furthermore, the control module is also used for:

[0168] Based on the nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and the revenue value, the nuclear power unit is controlled to operate with base load, the first energy storage device is controlled to participate in the peak shaving of the power grid, and the second energy storage device is controlled to participate in the primary and secondary frequency regulation of the power grid.

[0169] Furthermore, the control module is also used for:

[0170] The frequency regulation capacity corresponding to the secondary frequency regulation is detected, and the frequency regulation capacity is compared with the configuration capacity corresponding to the second energy storage device;

[0171] If the frequency regulation capacity is greater than the configured capacity, then the first energy storage device and the second energy storage device are controlled to participate in the secondary frequency regulation of the power grid simultaneously.

[0172] The present invention also provides a nuclear power-energy storage combined frequency regulation and peak shaving system.

[0173] The nuclear power-energy storage joint frequency regulation and peak shaving system includes: a memory, a processor, and a nuclear power-energy storage joint frequency regulation and peak shaving program stored in the memory and executable on the processor. When the nuclear power-energy storage joint frequency regulation and peak shaving program is executed by the processor, it implements the steps of the nuclear power-energy storage joint frequency regulation and peak shaving method as described above.

[0174] The method implemented when the nuclear power-energy storage joint frequency regulation and peak shaving program running on the processor is executed can be referred to in various embodiments of the nuclear power-energy storage joint frequency regulation and peak shaving method of the present invention, and will not be repeated here.

[0175] The present invention also provides a storage medium.

[0176] The storage medium stores a nuclear power-energy storage joint frequency regulation and peak shaving program, which, when executed by a processor, implements the steps of the nuclear power-energy storage joint frequency regulation and peak shaving method as described above.

[0177] The method implemented when the nuclear power-energy storage joint frequency regulation and peak shaving program running on the processor is executed can be referred to in various embodiments of the nuclear power-energy storage joint frequency regulation and peak shaving method of the present invention, and will not be repeated here.

[0178] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0179] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0180] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0181] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for combined nuclear power and energy storage frequency regulation and peak shaving, characterized in that, The nuclear power - energy storage combined frequency regulation and peak shaving method includes the following steps: Determine the frequency regulation and peak shaving constraint conditions, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data, and input the frequency regulation and peak shaving constraint conditions, the frequency regulation and peak shaving cost data, and the frequency regulation and peak shaving revenue data into a pre - created configuration model; Generate a nuclear power - energy storage combined frequency regulation and peak shaving configuration plan and a revenue value through the configuration model, and based on the nuclear power - energy storage combined frequency regulation and peak shaving configuration plan and the revenue value, control the energy storage system supporting the nuclear power unit to participate in the frequency regulation and peak shaving of the power grid; The step of determining the frequency regulation and peak shaving constraint conditions includes: Determine the frequency regulation and peak shaving constraint conditions according to the frequency regulation performance constraint, peak shaving performance constraint, the primary frequency regulation performance requirement constraint of the nuclear power unit, and the energy storage constraint of the energy storage system; the frequency regulation performance constraint includes the frequency regulation dead - zone range of the second energy storage device in the energy storage system, and the primary frequency regulation performance requirement constraint of the nuclear power unit includes the primary frequency regulation dead - zone range of the nuclear power unit, and the frequency regulation dead - zone range of the second energy storage device is less than the primary frequency regulation dead - zone range of the nuclear power unit; The energy storage system includes a first energy storage device and a second energy storage device, and the step of, based on the nuclear power - energy storage combined frequency regulation and peak shaving configuration plan and the revenue value, controlling the energy storage system supporting the nuclear power unit to participate in the frequency regulation and peak shaving of the power grid includes: Based on the nuclear power - energy storage combined frequency regulation and peak shaving configuration plan and the revenue value, control the nuclear power unit to operate with base load, control the first energy storage device to participate in the peak shaving of the power grid, and control the second energy storage device to participate in the primary frequency regulation and secondary frequency regulation of the power grid.

2. The nuclear power-energy storage combined frequency regulation and peak shaving method as described in claim 1, characterized in that, The step of determining the frequency regulation and peak shaving cost data and the frequency regulation and peak shaving revenue data includes: Determine the frequency regulation and peak shaving cost data according to the historical operation data of the nuclear power unit and the cost data, capacity data, and performance data of the energy storage system; Determine the frequency regulation revenue data according to the frequency regulation service parameters and the geographical location information of the nuclear power unit, determine the peak shaving revenue data according to the peak shaving service parameters and the geographical location information of the nuclear power unit, and determine the frequency regulation and peak shaving revenue data according to the frequency regulation revenue data and the peak shaving revenue data.

3. The nuclear power-energy storage combined frequency regulation and peak shaving method as described in claim 2, characterized in that, The frequency regulation and peak shaving cost data includes: the initial investment of the energy storage system, the operation and maintenance cost of the energy storage system, the final salvage value of the energy storage system, and the service cost and operation and maintenance cost of the nuclear power unit. The step of determining the frequency regulation and peak shaving cost data according to the historical operation data of the nuclear power unit and the cost data, capacity data, and performance data of the energy storage system includes: Calculate the service cost and operation and maintenance cost of the nuclear power unit according to the historical operation data of the nuclear power unit; Calculate the initial investment of the energy storage system, the operation and maintenance cost of the energy storage system, and the final salvage value of the energy storage system according to the cost data, capacity data, and performance data of the energy storage system.

4. The nuclear power-energy storage combined frequency regulation and peak shaving method as described in claim 2, characterized in that, The step of determining the frequency regulation revenue data according to the frequency regulation service parameters and the geographical location information of the nuclear power unit includes: Based on the actual frequency modulation rate, response delay time, and frequency modulation error in the frequency modulation service parameters, determine the frequency modulation speed, primary frequency modulation response time, secondary frequency modulation response time, and frequency modulation accuracy. The primary frequency modulation performance index is calculated based on the frequency modulation speed, the primary frequency modulation response time, and the frequency modulation accuracy; and the secondary frequency modulation performance index is calculated based on the frequency modulation speed, the secondary frequency modulation response time, and the frequency modulation accuracy. Based on the primary frequency regulation performance indicators, the secondary frequency regulation performance indicators, the geographical location information of the nuclear power unit, and the frequency regulation service parameters including the number of primary frequency regulation times, the number of secondary frequency regulation times, the frequency regulation price, and the frequency regulation capacity, the frequency regulation revenue data is calculated.

5. The nuclear power-energy storage combined frequency regulation and peak shaving method as described in claim 2, characterized in that, The step of determining peak-shaving revenue data based on peak-shaving service parameters and the geographical location information of the nuclear power unit includes: Electricity market rules are determined based on the geographical location information of the nuclear power units; Based on the electricity market rules, the number of peak shaving operations, the peak shaving price, and the peak shaving capacity in the peak shaving service parameters, the peak shaving revenue data is calculated.

6. The nuclear power-energy storage combined frequency regulation and peak shaving method as described in claim 1, characterized in that, After the step of controlling the second energy storage device to participate in the primary and secondary frequency regulation of the power grid, the following steps are included: The frequency regulation capacity corresponding to the secondary frequency regulation is detected, and the frequency regulation capacity is compared with the configuration capacity corresponding to the second energy storage device; If the frequency regulation capacity is greater than the configured capacity, then the first energy storage device and the second energy storage device are controlled to participate in the secondary frequency regulation of the power grid simultaneously.

7. A nuclear power-energy storage combined frequency regulation and peak shaving device, characterized in that, The nuclear power-energy storage combined frequency regulation and peak shaving device includes: The determination module is used to determine the frequency regulation and peak shaving constraints, frequency regulation and peak shaving cost data, and frequency regulation and peak shaving revenue data, and input the frequency regulation and peak shaving constraints, the frequency regulation and peak shaving cost data, and the frequency regulation and peak shaving revenue data into a pre-created configuration model; The control module is used to generate a nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and revenue value through the configuration model, and control the energy storage system matched with the nuclear power unit to participate in the frequency regulation and peak shaving of the power grid based on the nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and the revenue value. The determining module also includes: Based on the frequency regulation performance constraints, peak shaving performance constraints, primary frequency regulation performance requirements of the nuclear power unit, and energy storage constraints of the energy storage system, frequency regulation and peak shaving constraints are determined; the frequency regulation performance constraints include the frequency regulation dead zone range of the second energy storage device in the energy storage system, the primary frequency regulation performance requirements of the nuclear power unit include the primary frequency regulation dead zone range of the nuclear power unit, and the frequency regulation dead zone range of the second energy storage device is smaller than the primary frequency regulation dead zone range of the nuclear power unit. The control module is also used for: Based on the nuclear power-energy storage joint frequency regulation and peak shaving configuration scheme and the revenue value, the nuclear power unit is controlled to operate with base load, the first energy storage device is controlled to participate in the peak shaving of the power grid, and the second energy storage device is controlled to participate in the primary and secondary frequency regulation of the power grid.

8. A nuclear power-energy storage combined frequency regulation and peak shaving system, characterized in that, The nuclear power-energy storage joint frequency regulation and peak shaving system includes: a memory, a processor, and a nuclear power-energy storage joint frequency regulation and peak shaving program stored in the memory and executable on the processor. When the nuclear power-energy storage joint frequency regulation and peak shaving program is executed by the processor, it implements the steps of the nuclear power-energy storage joint frequency regulation and peak shaving method as described in any one of claims 1 to 6.

9. A storage medium, characterized in that, The storage medium stores a nuclear power-energy storage joint frequency regulation and peak shaving program, which, when executed by a processor, implements the steps of the nuclear power-energy storage joint frequency regulation and peak shaving method as described in any one of claims 1 to 6.

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