Method and device for coordinating the exit of energy-consuming devices in flexible direct current system and the restoration of direct current power

Abstract

The present application is about a method and device for coordinating the exit of energy-consuming devices in a flexible direct current system and the restoration of direct current power. The specific scheme is: real-time acquisition of offshore wind power output power data and AC system absorption power data; acquisition of multiple slope change intervals and multiple multiple values ​​corresponding to each slope change interval; based on the offshore wind power output power data and the AC system absorption power data, determine the power change curve of the energy-consuming device; in response to the elimination of the fault of the AC system of the inverter station of the flexible direct current transmission system, respectively obtain the power value consumed by the energy-consuming device before the fault is eliminated and the power value consumed by the energy-consuming device at the current moment; based on the slope change interval, the multiple values ​​corresponding to each slope change interval, the power value consumed by the energy-consuming device at the current moment and the power value consumed by the energy-consuming device before the fault is eliminated, determine the target power consumption, and control the energy-consuming device to adjust the current power consumption to the target power consumption. The present application effectively reduces the number of switching times of the energy-consuming device.

Description

Technical Field

[0001] The present application relates to the technical field of offshore wind power generation, and in particular to a method and device for coordinating the exit of energy-consuming devices in a flexible direct current system and the recovery of direct current power. Background Art

[0002] In the related art, after an onshore AC fault occurs, the AC side active power delivery capacity of the onshore converter station of the flexible DC system decreases. Since the power of the offshore wind farm cannot be fully delivered, a large amount of surplus power appears in the DC system, resulting in a rapid increase in the submodule voltage of the converter station and the inter-pole DC voltage, which can trigger overvoltage protection in a few milliseconds to tens of milliseconds, causing the system to stop operating. The existing control strategies include adopting energy-consuming resistor devices, reducing the power of wind turbines, or adjusting the AC bus voltage amplitude of the offshore sending-end converter station by the rapid adjustment capability of the flexible DC transmission system. However, a single control strategy is often limited in capacity. For example, the use of energy-consuming resistor devices can effectively consume excess power, but the requirements for its resistance parameters are high, the economy is not high, and the demand for fast response speed also makes the investment cost of energy-consuming resistor devices high; the use of wind turbines to reduce power can also balance the power to a certain extent, but the response speed is too slow; the use of flexible DC systems to control the AC voltage has a fast response speed, but its essence is to use the low voltage ride-through capability of offshore wind turbines, which has little effect on serious faults and is very likely to cause wind turbines to be disconnected from the grid. Summary of the invention

[0003] To this end, the present application provides a method and device for coordinating the exit of energy-consuming devices in a flexible direct current system and the restoration of direct current power. The technical solution of the present application is as follows:

[0004] According to a first aspect of an embodiment of the present application, a method for coordinating the exit of an energy-consuming device in a flexible direct current system and the restoration of direct current power is provided, the method comprising:

[0005] Obtain offshore wind power output data and AC system absorption power data in real time;

[0006] Obtaining a plurality of slope change intervals and multiple values ​​corresponding to the plurality of slope change intervals;

[0007] Determine a power variation curve of the energy consumption device based on the offshore wind power output power data and the AC system absorption power data;

[0008] In response to the elimination of a fault in the AC system of the inverter station of the flexible direct current transmission system, respectively obtaining a power value consumed by the energy consuming device before the fault is eliminated and a power value consumed by the energy consuming device at the current moment;

[0009] Based on the slope change interval, the multiple values ​​corresponding to each of the multiple slope change intervals, the power consumption value of the energy-consuming device at the current moment, and the power value consumed by the energy-consuming device before the fault is eliminated, the target power consumption is determined, and the energy-consuming device is controlled to adjust the current power consumption to the target power consumption.

[0010] According to an embodiment of the present application, determining a power variation curve consumed by an energy consuming device based on the offshore wind power output power data and the AC system absorption power data includes:

[0011] Subtract the offshore wind power output power data at the current moment from the AC system absorption power data at the current moment to obtain the power consumption value of the energy consuming device at the current moment;

[0012] Based on the current moment and the power consumption value of the energy consuming device at the current moment, a power variation curve consumed by the energy consuming device is updated.

[0013] According to an embodiment of the present application, the target power consumption is determined based on the multiple slope change intervals, the multiple values ​​corresponding to each of the multiple slope change intervals, the power consumption value of the energy consuming device at the current moment, and the power value consumed by the energy consuming device before the fault is eliminated, and the energy consuming device is controlled to adjust the current power consumption to the target power consumption, including:

[0014] Determine the slope value corresponding to the power consumption value of the energy consuming device at the current moment in the power change curve;

[0015] Based on the multiple slope change intervals, determining the slope change interval to which the slope value belongs;

[0016] Based on the slope change interval to which the slope value belongs, determining a multiple value corresponding to the slope change interval to which the slope value belongs;

[0017] Multiplying the multiplier value by the power value consumed by the energy-consuming device before the fault is eliminated to obtain the target power consumption;

[0018] The energy consumption device is controlled to adjust the current power consumption to the target power consumption.

[0019] According to an embodiment of the present application, the multiple values ​​corresponding to each of the plurality of slope change intervals are integers greater than or equal to 0.

[0020] According to a second aspect of an embodiment of the present application, a device for coordinating the exit of a flexible direct current system energy consumption device and the restoration of direct current power is provided, the device comprising:

[0021] The first acquisition module is used to acquire the offshore wind power output power data and the AC system absorption power data in real time;

[0022] A second acquisition module is used to acquire a plurality of slope change intervals and multiple values ​​corresponding to the plurality of slope change intervals;

[0023] A determination module, used to determine a power variation curve consumed by an energy consuming device based on the offshore wind power output power data and the AC system absorption power data;

[0024] A third acquisition module is used for respectively acquiring the power value consumed by the energy-consuming device before the fault is eliminated and the power value consumed by the energy-consuming device at the current moment in response to the elimination of the fault of the AC system of the inverter station of the flexible direct current transmission system;

[0025] A control module is used to determine the target power consumption based on the slope change interval, the multiple values ​​corresponding to each of the multiple slope change intervals, the power consumption value of the energy-consuming device at the current moment, and the power value consumed by the energy-consuming device before the fault is eliminated, and control the energy-consuming device to adjust the current power consumption to the target power consumption.

[0026] According to one embodiment of the present application, the determining module includes:

[0027] A subtraction submodule, used for subtracting the offshore wind power output power data at the current moment from the AC system absorption power data at the current moment, to obtain the power consumption value of the energy consuming device at the current moment;

[0028] The updating submodule is used to update the power consumption change curve of the energy consuming device based on the current moment and the power consumption value of the energy consuming device at the current moment.

[0029] According to one embodiment of the present application, the control module includes:

[0030] A first determination submodule, used to determine a slope value corresponding to the power consumption value of the energy consuming device at the current moment in the power change curve;

[0031] A second determining submodule, configured to determine, based on the multiple slope change intervals, the slope change interval to which the slope value belongs;

[0032] A third determining submodule, configured to determine, based on the slope change interval to which the slope value belongs, a multiple value corresponding to the slope change interval to which the slope value belongs;

[0033] A multiplication submodule, used for multiplying the multiple value by the power value consumed by the energy-consuming device before the fault is eliminated, to obtain the target power consumption;

[0034] The control submodule is used to control the energy consumption device to adjust the current power consumption to the target power consumption.

[0035] According to a third aspect of an embodiment of the present application, there is provided an electronic device, comprising: a processor, and a memory communicatively connected to the processor;

[0036] The memory stores computer-executable instructions;

[0037] The processor executes the computer-executable instructions stored in the memory to implement the method as described in any one of the first aspects.

[0038] According to a fourth aspect of an embodiment of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement a method as described in any one of the first aspects.

[0039] According to a fifth aspect of an embodiment of the present application, a computer program product is provided, including a computer program, which implements any one of the methods in the first aspect when executed by a processor.

[0040] The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0041] By acquiring the offshore wind power output power data and AC system absorption power data in real time; acquiring multiple slope change intervals and multiple values ​​corresponding to each of the multiple slope change intervals; determining the power change curve of the energy consumption device based on the offshore wind power output power data and the AC system absorption power data; in response to the elimination of the fault of the AC system of the inverter station of the flexible direct current transmission system, respectively obtaining the power value consumed by the energy consumption device before the fault is eliminated and the power value consumed by the energy consumption device at the current moment; determining the target power consumption based on the slope change interval, the multiple values ​​corresponding to each of the multiple slope change intervals, the power consumption value of the energy consumption device at the current moment and the power consumption value of the energy consumption device before the fault is eliminated, and controlling the energy consumption device to adjust the current power consumption to the target power consumption. This effectively reduces the switching times of the energy consumption device and realizes the smooth and rapid recovery of the energy consumption device to the normal operation state after the AC system fault is eliminated.

[0042] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute improper limitations on the present application.

[0044] Figure 1 It is a flow chart of a method for coordinating the exit of a flexible direct current system energy consumption device and the restoration of direct current power in an embodiment of the present application;

[0045] Figure 2 It is a structural block diagram of a flexible direct current system energy consumption device exit and direct current power recovery coordination device in an embodiment of the present application;

[0046] Figure 3 is a block diagram of an electronic device in an embodiment of the present application;

[0047] Figure 4 This is a trend chart of the power consumed by the energy consuming device in the embodiment of the present application. DETAILED DESCRIPTION

[0048] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application 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 interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0050] It should be noted that in the relevant technologies, the grid connection methods of offshore wind power transmission are mainly divided into two categories: high-voltage AC transmission and high-voltage DC transmission. Among them, high-voltage DC transmission adopts flexible DC transmission technology based on voltage source converter. Flexible DC transmission technology effectively isolates the internal AC system of the wind farm from the external large power grid, so that the negative impact of the strong randomness, high intermittency and large volatility of offshore wind power on the main grid is reduced to a minimum, greatly improving the safety and stability of offshore wind power grid connection.

[0051] After an onshore AC fault occurs, the AC side active power delivery capacity of the onshore converter station of the flexible DC system decreases. Since the power of the offshore wind farm cannot be fully delivered, a large amount of surplus power appears in the DC system, resulting in a rapid increase in the submodule voltage and the inter-pole DC voltage of the converter station. Overvoltage protection can be triggered in a few milliseconds to tens of milliseconds, causing the system to stop operating. Existing control strategies include adopting energy-consuming resistor devices, reducing the power of wind turbines, or adjusting the AC bus voltage amplitude of the offshore sending-end converter station by the rapid adjustment capability of the flexible DC transmission system. However, a single control strategy is often limited in capacity. For example, the use of energy-consuming resistor devices can effectively consume excess power, but the requirements for its resistance parameters are high, the economy is not high, and the demand for fast response speed also makes the investment cost of energy-consuming resistor devices high; the use of wind turbines to reduce power can also balance the power to a certain extent, but the response speed is too slow; the use of flexible DC systems to control AC voltage has a fast response speed, but its essence is to use the low voltage ride-through capability of offshore wind turbines, which has little effect on serious faults and is very likely to cause wind turbines to be disconnected from the grid. After an AC system fault occurs at the inverter station of a flexible DC transmission system, the AC bus voltage decreases, causing the DC line voltage to decrease and the active power absorbed by the AC system to be greatly reduced. Most of the existing control strategies target this phenomenon during the fault period by coordinating the control of energy-consuming devices with the flexible DC system to achieve surplus power absorption. However, when the fault is restored and the AC system gradually recovers its power absorption, there is a lack of effective coordinated control strategies.

[0052] Based on the above problems, the present application proposes a method and device for coordinating the exit of energy-consuming devices in a flexible direct current system and the restoration of direct current power, which can be achieved by obtaining the output power data of offshore wind power and the power absorption data of the AC system in real time; obtaining multiple slope change intervals and multiple values ​​corresponding to each of the slope change intervals; determining the power change curve of the energy-consuming device based on the output power data of offshore wind power and the power absorption data of the AC system; in response to the elimination of the fault of the AC system of the inverter station of the flexible direct current transmission system, respectively obtaining the power value consumed by the energy-consuming device before the fault is eliminated and the power value consumed by the energy-consuming device at the current moment; determining the target power consumption based on the slope change interval, the multiple values ​​corresponding to each of the slope change intervals, the power value consumed by the energy-consuming device at the current moment and the power value consumed by the energy-consuming device before the fault is eliminated, and controlling the energy-consuming device to adjust the current power consumption to the target power consumption. This effectively reduces the number of frequent switching on and off of the energy-consuming device, and realizes that the energy-consuming device smoothly and quickly resumes normal operation after the AC system fault is eliminated.

[0053] Figure 1 It is a flow chart of a method for coordinating the exit of energy-consuming devices in a flexible DC system and the recovery of DC power in an embodiment of the present application.

[0054] like Figure 1 As shown, the method for coordinating the exit of the energy-consuming device of the flexible direct current system and the restoration of direct current power includes:

[0055] Step 101, real-time acquisition of offshore wind power output power data and AC system absorption power data.

[0056] Step 102: Obtain a plurality of slope change intervals and multiple values ​​corresponding to the plurality of slope change intervals.

[0057] As an example of possible implementation, since the power consumed by the energy-consuming device gradually decreases after the fault of the AC system of the inverter station of the flexible direct current transmission system is eliminated, multiple slope change intervals of the power change curve consumed by the energy-consuming device and the multiple values ​​corresponding to the multiple slope change intervals can be pre-set according to actual conditions, so that the energy-consuming device can be controlled in stages according to the multiple slope change intervals.

[0058] It should be noted that if Figure 4 As shown, multiple slope change gear values ​​can be set as needed to perform multi-stage switching of energy-consuming devices. When there are many slope gears, Figure 4 The middle dotted line is closer to the actual power fluctuation curve, and can achieve smooth power regulation of the energy-consuming device, but the control is more complicated and may also lead to too high switching frequency of the device, damaging the life of the device. When the slope gear is low, the energy-consuming device can be quickly exited, the control is simple, and the switching frequency of the device can be effectively reduced. However, the too-fast exit of the energy-consuming device will cause power fluctuations in the receiving system and cannot achieve smooth and stable power recovery. Therefore, the slope change range can be set according to actual needs.

[0059] In some embodiments of the present application, the multiple values ​​corresponding to each of the plurality of slope change intervals are integers greater than or equal to 0. It is understandable that when the multiple value corresponding to the slope change interval is 0, the energy consumption device exits operation.

[0060] Step 103: Determine a power variation curve of the energy consumption device based on the offshore wind power output power data and the AC system absorption power data.

[0061] In some embodiments of the present application, step 103 includes:

[0062] Step a1, subtract the current offshore wind power output data from the current AC system absorption power data to obtain the current energy consumption value of the energy consuming device.

[0063] As a possible implementation example, the power consumption value of the energy consuming device at the current moment can be calculated by the following formula:

[0064] P ec =P in -P out

[0065] Among them, Pou t is the AC system absorbed power data at the current moment, P in is the offshore wind power output power, P ec It is the power consumption value of the energy consuming device at the current moment.

[0066] Step a2: based on the current moment and the power consumption value of the energy consuming device at the current moment, update the power consumption change curve of the energy consuming device.

[0067] like Figure 4 As shown, Figure 4 The solid line in is the power consumption change curve of the energy consuming device. The power consumption value of the energy consuming device at the current moment is calculated, and the power consumption change curve of the energy consuming device is obtained.

[0068] Step 104, in response to the elimination of the fault of the AC system of the inverter station of the flexible direct current transmission system, respectively obtain the power value consumed by the energy consuming device before the fault is eliminated and the power value consumed by the energy consuming device at the current moment.

[0069] As an example of possible implementation, it is possible to monitor in real time whether the AC system fault has been eliminated. In response to monitoring that the fault in the AC system of the inverter station of the flexible direct current transmission system has been eliminated, the power value consumed by the energy-consuming device before the fault is eliminated and the power value consumed by the energy-consuming device at the current moment are obtained respectively.

[0070] Step 105, based on the slope change interval, the multiple values ​​corresponding to the multiple slope change intervals, the power consumption value of the energy consuming device at the current moment and the power value consumed by the energy consuming device before the fault is eliminated, determine the target power consumption, and control the energy consuming device to adjust the current power consumption to the target power consumption.

[0071] In some embodiments of the present application, step 105 includes:

[0072] Step b1, determining the slope value corresponding to the power consumption value of the energy consuming device at the current moment in the power variation curve.

[0073] As a possible implementation example, the power consumption value of the energy consuming device at the current moment is derived to obtain the slope value corresponding to the power consumption value of the energy consuming device at the previous moment in the power change curve.

[0074] Step b2: determining the slope change interval to which the slope value belongs based on multiple slope change intervals.

[0075] Step b3, based on the slope change interval to which the slope value belongs, determine the multiple value corresponding to the slope change interval to which the slope value belongs.

[0076] Step b4, multiplying the multiplier value by the power value consumed by the energy-consuming device before the fault is eliminated to obtain the target power consumption.

[0077] Step b5, controlling the energy consumption device to adjust the current power consumption to the target power consumption.

[0078] For example, if Figure 4 As shown, t is time, and three slope change intervals K1, K2, and K3 are defined. When the fault is eliminated, the absorbed power recovers quickly. At this time, the absolute value of the slope is larger, which is K1. Under this slope, the power consumption of the energy-consuming device is directly reduced from the original Pec1 to 0.5 Pec1. When the AC system absorbs power and the absolute value of the slope is reduced to K2, the power consumption of the energy-consuming device is reduced to 0.25 Pec1. When the absolute value of the slope of the AC system absorbed power change is reduced to K3, the energy-consuming device exits operation. At this point, the fault recovery period is completed and the energy-consuming device exits smoothly. Among them, Pec1 is the power value consumed by the energy-consuming device before the fault is eliminated.

[0079] According to the method for coordinating the exit of energy-consuming devices in a flexible direct current system and the restoration of direct current power, the offshore wind power output power data and the AC system absorption power data are obtained in real time; multiple slope change intervals and multiple multiple values ​​corresponding to each slope change interval are obtained; based on the offshore wind power output power data and the AC system absorption power data, the power change curve of the energy-consuming device consumption is determined; in response to the elimination of the fault of the AC system of the inverter station of the flexible direct current transmission system, the power value consumed by the energy-consuming device before the fault is eliminated and the power value consumed by the energy-consuming device at the current moment are obtained respectively; based on the slope change interval, the multiple values ​​corresponding to each slope change interval, the power value consumed by the energy-consuming device at the current moment and the power value consumed by the energy-consuming device before the fault is eliminated, the target power consumption is determined, and the energy-consuming device is controlled to adjust the current power consumption to the target power consumption. This effectively reduces the number of frequent switching on and off of the energy-consuming device, and realizes that the energy-consuming device smoothly and quickly resumes normal operation after the AC system fault is eliminated.

[0080] Figure 2 This is a structural block diagram of a flexible DC system energy consumption device exit and DC power recovery coordination device in an embodiment of the present application.

[0081] like Figure 2 As shown, the flexible direct current system energy consumption device exit and direct current power recovery coordination device includes:

[0082] The first acquisition module 201 is used to acquire the offshore wind power output power data and the AC system absorption power data in real time;

[0083] The second acquisition module 202 is used to acquire a plurality of slope change intervals and multiple values ​​corresponding to the plurality of slope change intervals;

[0084] A determination module 203, for determining a power variation curve of the energy consumption device based on the offshore wind power output power data and the AC system absorption power data;

[0085] The third acquisition module 204 is used to obtain the power value consumed by the energy consuming device before the fault is eliminated and the power value consumed by the energy consuming device at the current moment in response to the elimination of the fault of the AC system of the inverter station of the flexible direct current transmission system;

[0086] The control module 205 is used to determine the target power consumption based on the slope change interval, the multiple values ​​corresponding to the multiple slope change intervals, the power consumption value of the energy-consuming device at the current moment, and the power value consumed by the energy-consuming device before the fault is eliminated, and control the energy-consuming device to adjust the current power consumption to the target power consumption.

[0087] In some embodiments of the present application, the determination module 203 includes:

[0088] The subtraction submodule is used to subtract the offshore wind power output power data at the current moment from the AC system absorption power data at the current moment to obtain the power consumption value of the energy consuming device at the current moment;

[0089] The updating submodule is used to update the power consumption change curve of the energy consuming device based on the current moment and the power consumption value of the energy consuming device at the current moment.

[0090] In some embodiments of the present application, the control module 205 includes:

[0091] The first determination submodule is used to determine the slope value corresponding to the power consumption value of the energy consuming device at the current moment in the power change curve;

[0092] A second determination submodule, configured to determine a slope change interval to which the slope value belongs based on a plurality of slope change intervals;

[0093] A third determination submodule, configured to determine, based on the slope change interval to which the slope value belongs, a multiple value corresponding to the slope change interval to which the slope value belongs;

[0094] A multiplication submodule, used for multiplying the multiplication value by the power value consumed by the energy consumption device before the fault is eliminated, to obtain the target power consumption;

[0095] The control submodule is used to control the energy consumption device to adjust the current power consumption to the target power consumption.

[0096] According to the flexible direct current system energy consumption device exit and direct current power recovery coordination device of the embodiment of the present application, by real-time acquisition of offshore wind power output power data and AC system absorption power data; acquisition of multiple slope change intervals and multiple slope change intervals corresponding to each multiple slope change interval; based on the offshore wind power output power data and AC system absorption power data, determine the power change curve of energy consumption device consumption; in response to the elimination of the fault of the AC system of the inverter station of the flexible direct current transmission system, respectively obtain the power value consumed by the energy consumption device before the fault is eliminated and the power value consumed by the energy consumption device at the current moment; based on the slope change interval, the multiple slope change intervals corresponding to each multiple slope change interval, the power value consumed by the energy consumption device at the current moment and the power value consumed by the energy consumption device before the fault is eliminated, determine the target power consumption, and control the energy consumption device to adjust the current power consumption to the target power consumption. Thereby effectively reducing the number of frequent switching of energy consumption devices, and realizing the smooth and rapid recovery of energy consumption devices to normal operation after the AC system fault is eliminated.

[0097] Figure 3 FIG. 1 is a block diagram of an electronic device in an embodiment of the present application. Figure 3 As shown, the electronic device may include: a transceiver 31 , a processor 32 , and a memory 33 .

[0098] The processor 32 executes the computer execution instructions stored in the memory, so that the processor 32 executes the scheme in the above embodiment. The processor 32 can be a general-purpose processor, including a central processing unit CPU, a network processor (NP), etc.; it can also be a digital signal processor DSP, an application-specific integrated circuit ASIC, a field programmable gate array FPGA or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.

[0099] The memory 33 is connected to the processor 32 via a system bus and completes communication between them. The memory 33 is used to store computer program instructions.

[0100] The transceiver 31 may be used to obtain tasks to be executed and configuration information of the tasks to be executed.

[0101] The system bus can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The system bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus. The transceiver is used to realize the communication between the database access device and other computers (such as clients, read-write libraries, and read-only libraries). The memory may include random access memory (RAM) and may also include non-volatile memory.

[0102] The electronic device provided in the embodiment of the present application may be the terminal device of the above embodiment.

[0103] An embodiment of the present application also provides a chip for running instructions, which is used to execute the technical solution of the message processing method in the above embodiment.

[0104] An embodiment of the present application further provides a computer-readable storage medium, in which computer instructions are stored. When the computer instructions are executed on a computer, the computer executes the technical solution of the message processing method of the above embodiment.

[0105] An embodiment of the present application also provides a computer program product, which includes a computer program stored in a computer-readable storage medium. At least one processor can read the computer program from the computer-readable storage medium. When at least one processor executes the computer program, it can implement the technical solution of the message processing method in the above embodiment.

[0106] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0107] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for coordinating the exit of energy-consuming devices in a flexible DC system and the restoration of DC power, characterized in that: The method comprises: Obtain offshore wind power output data and AC system absorption power data in real time; Acquire multiple slope change intervals of a power change curve consumed by an energy consuming device and multiple values ​​corresponding to each of the multiple slope change intervals; Determine a power variation curve of the energy consumption device based on the offshore wind power output power data and the AC system absorption power data; In response to the elimination of a fault in the AC system of the inverter station of the flexible direct current transmission system, respectively obtaining a power value consumed by the energy consuming device before the fault is eliminated and a power value consumed by the energy consuming device at the current moment; Determine the target power consumption based on the multiple slope change intervals, the multiple values ​​corresponding to each of the multiple slope change intervals, the power consumption value of the energy consumption device at the current moment, and the power value consumed by the energy consumption device before the fault is eliminated, and control the energy consumption device to adjust the current power consumption to the target power consumption; The determining of the target power consumption based on the multiple slope change intervals, the multiple values ​​corresponding to the multiple slope change intervals, the power consumption value of the energy consumption device at the current moment, and the power value consumed by the energy consumption device before the fault is eliminated, and controlling the energy consumption device to adjust the current power consumption to the target power consumption includes: Determine the slope value corresponding to the power consumption value of the energy consuming device at the current moment in the power change curve; Based on the multiple slope change intervals, determining the slope change interval to which the slope value belongs; Based on the slope change interval to which the slope value belongs, determining a multiple value corresponding to the slope change interval to which the slope value belongs; Multiplying the multiplier value by the power value consumed by the energy consuming device before the fault is eliminated to obtain the target power consumption; The energy consumption device is controlled to adjust the current power consumption to the target power consumption.

2. The method according to claim 1, characterized in that: The determining of the power variation curve of the energy consumption device based on the offshore wind power output power data and the AC system absorption power data includes: Subtract the offshore wind power output power data at the current moment from the AC system absorption power data at the current moment to obtain the power consumption value of the energy consuming device at the current moment; Based on the current moment and the power consumption value of the energy consuming device at the current moment, a power variation curve consumed by the energy consuming device is updated.

3. The method according to claim 1, characterized in that The multiple values ​​corresponding to each of the plurality of slope change intervals are integers greater than or equal to 0.

4. A flexible DC system energy consumption device exit and DC power recovery coordination device, characterized in that: The device comprises: The first acquisition module is used to acquire the offshore wind power output power data and the AC system absorption power data in real time; A second acquisition module is used to acquire a plurality of slope change intervals of a power change curve consumed by the energy consuming device and multiple values ​​corresponding to each of the plurality of slope change intervals; A determination module, used to determine a power variation curve consumed by an energy consuming device based on the offshore wind power output power data and the AC system absorption power data; A third acquisition module is used for respectively acquiring the power value consumed by the energy consuming device before the fault is eliminated and the power value consumed by the energy consuming device at the current moment in response to the elimination of the fault of the AC system of the inverter station of the flexible direct current transmission system; A control module, configured to determine a target power consumption based on the multiple slope change intervals, the multiple values ​​corresponding to the multiple slope change intervals, the power consumption value of the energy consumption device at the current moment, and the power value consumed by the energy consumption device before the fault is eliminated, and control the energy consumption device to adjust the current power consumption to the target power consumption; The control module comprises: A first determination submodule, used to determine a slope value corresponding to the power consumption value of the energy consuming device at the current moment in the power change curve; A second determining submodule, configured to determine, based on the multiple slope change intervals, the slope change interval to which the slope value belongs; A third determining submodule, configured to determine, based on the slope change interval to which the slope value belongs, a multiple value corresponding to the slope change interval to which the slope value belongs; A multiplication submodule, used for multiplying the multiple value by the power value consumed by the energy consuming device before the fault is eliminated, to obtain the target power consumption; The control submodule is used to control the energy consumption device to adjust the current power consumption to the target power consumption.

5. The device according to claim 4, characterized in that The determination module comprises: A subtraction submodule, used for subtracting the offshore wind power output power data at the current moment from the AC system absorption power data at the current moment, to obtain the power consumption value of the energy consuming device at the current moment; The updating submodule is used to update the power consumption change curve of the energy consuming device based on the current moment and the power consumption value of the energy consuming device at the current moment.

6. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 3.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 3 when executed by a processor.

8. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 3 when being executed by a processor.

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