Operation method and device for assisting thermal power generating unit in hot start of wind power generating unit

Abstract

The invention discloses an operation method and device for assisting thermal power generating unit hot start by wind power generating units, and the method comprises the steps: obtaining the starting power of a thermal power generating unit, and determining the target number of to-be-started wind power generating units according to the starting power of the thermal power generating unit; determining the capacity of an external auxiliary power supply according to the target number of the to-be-started wind turbine generators; and based on the capacity of the external auxiliary power supply, starting a target number of wind turbine generator auxiliary machines at the external power supply to realize hot start of the thermal power generating unit. Therefore, the wind turbine generator with the self-starting capability drives the wind turbine generator without the self-starting capability to gradually start the thermal power generating unit, the starting cost is not additionally increased, and the starting speed and the economical efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of hot start technology, and in particular to a method and apparatus for hot start of a thermal power unit assisted by a wind turbine. Background Technology

[0002] Currently, after a power grid failure, it is necessary to quickly start thermal power units to restore normal power supply. With the maturity of wind turbine control technology and the increasing proportion of wind turbines, it is possible to assist thermal power units in hot starting using wind turbines. Furthermore, using wind turbines to assist thermal power units in hot starting can play a crucial role in the restoration of regional power grids after faults. Therefore, how to enable wind turbines to assist thermal power units in hot starting is an urgent problem to be solved. Summary of the Invention

[0003] The present invention proposes a method and apparatus for hot-starting a thermal power unit with the assistance of a wind turbine, so as to provide a method for hot-starting a thermal power unit with the assistance of a wind turbine.

[0004] To address this, the present invention proposes an operation method for hot-starting thermal power units using wind turbine units. This method allows wind turbine units with self-starting capabilities to drive wind turbine units without self-starting capabilities and gradually start the thermal power units, without increasing startup costs and improving startup speed and economy.

[0005] Another objective of this invention is to provide an operating device for assisting the hot start of a thermal power unit with a wind turbine.

[0006] To achieve the above objectives, the present invention provides a method for hot-starting a thermal power unit with the assistance of a wind turbine generator, the method comprising:

[0007] Obtain the starting power of the thermal power unit, and determine the target number of wind turbine units to be started based on the starting power of the thermal power unit;

[0008] Determine the capacity of the external auxiliary power supply based on the target number of wind turbine units to be started;

[0009] Based on the capacity of the external auxiliary power supply, the target number of wind turbine auxiliary machines are started by the external power supply to achieve hot start of the thermal power unit.

[0010] The wind turbine-assisted thermal power unit hot start operation method of the present invention may also have the following additional technical features:

[0011] In one embodiment of the present invention, determining the target number of wind turbine units to be started based on the starting power of the thermal power unit includes:

[0012] Obtain the current continuous effective output power of the wind turbine;

[0013] Based on the current continuous effective output power of the wind turbine and the starting power of the thermal power unit, the target number of wind turbines to be started is determined by calculation.

[0014] In one embodiment of the present invention, determining the capacity of the external auxiliary power supply based on the target number of wind turbine generators to be started includes:

[0015] Calculate the auxiliary power of the wind turbines to be started based on the target number of wind turbines to be started;

[0016] The capacity of the external auxiliary power supply is determined based on the auxiliary power of the wind turbine generator set.

[0017] In one embodiment of the present invention, the step of starting the auxiliary units of a target number of wind turbine units based on the capacity of the external auxiliary power supply to achieve hot start of the thermal power unit includes:

[0018] Based on the capacity of the external auxiliary power supply, when the external power supply starts the target number of wind turbine auxiliary machines, a frequency regulation control strategy is added to the wind turbine to control the wind farm frequency.

[0019] After the auxiliary equipment of the target number of wind turbine units is started by an external power source, the wind turbine units capture wind energy and output power stably, thereby realizing the hot start of the thermal power unit.

[0020] To achieve the above objectives, another aspect of the present invention provides an operating device for assisting the hot start of a thermal power unit with a wind turbine generator, the device comprising:

[0021] The acquisition module is used to acquire the starting power of the thermal power unit and determine the target number of wind turbine units to be started based on the starting power of the thermal power unit.

[0022] The determination module is used to determine the capacity of the external auxiliary power supply based on the target number of wind turbine units to be started;

[0023] The starting module is used to start the auxiliary equipment of the target number of wind turbine units based on the capacity of the external auxiliary power supply, thereby realizing the hot start of the thermal power unit.

[0024] In one embodiment of the present invention, the acquisition module is specifically used for:

[0025] Obtain the current continuous effective output power of the wind turbine;

[0026] Based on the current continuous effective output power of the wind turbine and the starting power of the thermal power unit, the target number of wind turbines to be started is determined by calculation.

[0027] In one embodiment of the present invention, the determining module is specifically used for:

[0028] Calculate the auxiliary power of the wind turbines to be started based on the target number of wind turbines to be started;

[0029] The capacity of the external auxiliary power supply is determined based on the auxiliary power of the wind turbine generator set.

[0030] In one embodiment of the present invention, the startup module is specifically used for:

[0031] Based on the capacity of the external auxiliary power supply, when the external power supply starts the target number of wind turbine auxiliary machines, a frequency regulation control strategy is added to the wind turbine to control the wind farm frequency.

[0032] After the auxiliary equipment of the target number of wind turbine units is started by an external power source, the wind turbine units capture wind energy and output power stably, thereby realizing the hot start of the thermal power unit.

[0033] Another object of the present invention is to provide an electronic device comprising:

[0034] At least one processor; and

[0035] A memory communicatively connected to the at least one processor; wherein,

[0036] The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method described in any one of the preceding aspects.

[0037] Another object of the present invention is to provide a computer storage medium storing computer-executable instructions; the computer-executable instructions, when executed by a processor, cause the computer to perform the method described in any one of the preceding aspects.

[0038] The wind turbine-assisted thermal power unit hot start operation method and device of the present invention can drive the thermal power unit without self-starting by a wind turbine with self-starting capability, and gradually realize the start-up of the thermal power unit without increasing the start-up cost, thus improving the start-up speed and economy.

[0039] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0040] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0041] Figure 1 This is a flowchart of a method for hot-starting a thermal power unit with a wind turbine according to an embodiment of the present invention;

[0042] Figure 2 This is a structural diagram of an operating device for assisting the hot start of a thermal power unit with a wind turbine, according to an embodiment of the present invention. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0045] The following describes, with reference to the accompanying drawings, the operating method and apparatus for hot-starting a wind turbine-assisted thermal power unit according to an embodiment of the present invention.

[0046] Figure 1 This is a flowchart of the operation method of wind turbine assisting thermal power unit hot start according to an embodiment of the present invention.

[0047] like Figure 1 As shown, the method includes:

[0048] S1, obtain the starting power of the thermal power unit, and determine the target number of wind turbine units to be started based on the starting power of the thermal power unit;

[0049] In one embodiment of the present invention, the method for determining the target number of wind turbine units to be started based on the starting power of the thermal power unit may include: obtaining the current continuous effective output power of the wind turbine unit, and determining the target number of wind turbine units to be started by calculation based on the current continuous effective output power of the wind turbine unit and the starting power of the thermal power unit.

[0050] In one embodiment of the present invention, the method for determining the target number of wind turbines to be started based on the current continuous effective output power of the wind turbine and the starting power of the thermal power unit may include: calculating the target number of wind turbines to be started using a first formula based on the current continuous effective output power of the wind turbine and the starting power of the thermal power unit, wherein the first formula is:

[0051] N≥P th / P ou

[0052] Among them, P ou P represents the current continuous effective power output of the wind turbine.th N represents the starting power of the thermal power unit, and N represents the target number of wind turbine units to be started. N is an integer.

[0053] Furthermore, in one embodiment of the present invention, the target number N of the wind turbine units to be started can be the smallest positive integer that satisfies the first formula, or the target number of wind turbine units to be started can be determined by human experience based on the value of N in the first formula.

[0054] S2, Determine the capacity of the external auxiliary power supply based on the target number of wind turbine units to be started;

[0055] In one embodiment of the present invention, after obtaining the target number of wind turbine units to be started through the above steps, the capacity of the external auxiliary power supply can be determined based on the target number of wind turbine units to be started.

[0056] Specifically, in one embodiment of the present invention, the method for determining the capacity of the external auxiliary power supply based on the target number of wind turbine units to be started may include: calculating the auxiliary power of the wind turbine units to be started based on the target number of wind turbine units to be started, and determining the capacity of the external auxiliary power supply based on the auxiliary power of the wind turbine units to be started.

[0057] In one embodiment of the present invention, the method for determining the capacity of the external auxiliary power supply based on the auxiliary power of the wind turbine generator set may include: determining the capacity of the external auxiliary power supply based on the auxiliary power of the wind turbine generator set using a second formula, wherein the second formula is:

[0058] P DG ≥NP wa

[0059] Among them, P DG P represents the capacity of the external auxiliary power supply. wa N represents the auxiliary capacity of each wind turbine unit, and N represents the target number of wind turbine units to be started.

[0060] Furthermore, in one embodiment of the present invention, the capacity P of the aforementioned external auxiliary power supply... DG The minimum value that satisfies the second formula can be obtained, or it can be determined based on human experience using P in the second formula mentioned above. DG The value of determines the capacity of the external auxiliary power supply.

[0061] S3, based on the capacity of the external auxiliary power supply, starts the auxiliary equipment of the target number of wind turbine units with the external power supply, thereby realizing the hot start of the thermal power unit.

[0062] In one embodiment of the present invention, after obtaining the capacity and target number of external auxiliary power supplies through the above steps, the auxiliary machines of the target number of wind turbine units can be started by the external power supply based on the capacity of the external auxiliary power supply, thereby realizing the hot start of the thermal power unit.

[0063] In one embodiment of the present invention, a method for hot-starting a thermal power unit by starting a target number of auxiliary wind turbine units based on the capacity of an external auxiliary power source may include: when starting a target number of auxiliary wind turbine units based on the capacity of the external auxiliary power source, adding a frequency modulation control strategy to the wind turbine units to control the wind farm frequency; after starting the target number of auxiliary wind turbine units based on the external auxiliary power source, the wind turbine units capture wind energy and stably output power, thereby achieving hot-starting of the thermal power unit.

[0064] Furthermore, in one embodiment of the present invention, based on the capacity of the external auxiliary power supply, when the external power supply starts the target number of wind turbine auxiliary units, a frequency regulation control strategy can be added to the wind turbine to complete the wind farm frequency control and stabilize the output frequency. In one embodiment of the present invention, primary and secondary frequency regulation strategies can be added to the wind turbine control to maintain frequency stability.

[0065] Furthermore, in one embodiment of the present invention, after the external power source starts the auxiliary equipment of the target number of wind turbine units, the external power source starts the auxiliary equipment of the wind turbine units. When the wind speed meets the starting conditions, the wind turbine units begin to output power stably, completing the hot start of the thermal power unit.

[0066] Furthermore, in one embodiment of the present invention, after the external power source starts the auxiliary equipment of the target number of wind turbine units, the external power source can charge the wind farm bus and stabilize the amplitude and frequency of the bus voltage, providing a reference value for the start-up of the remaining wind turbine units.

[0067] In one embodiment of the present invention, the above method can start remote thermal power units through the autonomous black start of multiple wind turbine units, thereby playing an important role in the recovery of regional power grid after a fault.

[0068] In one embodiment of the present invention, the starting power of the thermal power unit is obtained, and the target number of wind turbine units to be started is determined based on the starting power of the thermal power unit; the capacity of the external auxiliary power supply is determined based on the target number of wind turbine units to be started; based on the capacity of the external auxiliary power supply, the auxiliary equipment of the target number of wind turbine units is started by the external power supply, thereby realizing the hot start of the thermal power unit. Thus, wind turbine units with self-starting capability can drive wind turbine units without self-starting capability to gradually start the thermal power unit, without increasing the starting cost, improving the starting speed and economy.

[0069] To achieve the above embodiments, such as Figure 2 As shown, this embodiment also provides an operating device 10 for wind turbine-assisted thermal power unit hot start-up, which includes an acquisition module 201, a determination module 202 and a start-up module 203.

[0070] The acquisition module 201 is used to acquire the starting power of the thermal power unit and determine the target number of wind turbine units to be started based on the starting power of the thermal power unit.

[0071] The determination module 202 is used to determine the capacity of the external auxiliary power supply based on the target number of wind turbine units to be started;

[0072] The starting module 203 is used to start the auxiliary equipment of the target number of wind turbine units based on the capacity of the external auxiliary power supply, thereby realizing the hot start of the thermal power unit.

[0073] In this embodiment of the disclosure, the above-mentioned acquisition module is specifically used for:

[0074] Obtain the current continuous effective output power of the wind turbine;

[0075] Based on the current continuous effective output power of wind turbines and the starting power of thermal power units, the target number of wind turbines to be started is determined by calculation.

[0076] Furthermore, in this embodiment of the disclosure, the aforementioned determining module is specifically used for:

[0077] Calculate the auxiliary power of the wind turbines to be started based on the target number of wind turbines to be started;

[0078] Determine the capacity of the external auxiliary power supply based on the power of the auxiliary equipment used to start the wind turbine.

[0079] Furthermore, in this embodiment of the disclosure, the aforementioned startup module is specifically used for:

[0080] Based on the capacity of the external auxiliary power supply, when the external power supply starts the auxiliary equipment of the target number of wind turbine units, a frequency regulation control strategy is added to the wind turbine units to control the frequency of the wind farm.

[0081] After the auxiliary equipment of the target number of wind turbine units is started by an external power source, the wind turbine units capture wind energy and output power stably, thus realizing the hot start of the thermal power units.

[0082] According to an embodiment of the present invention, a wind turbine-assisted thermal power unit hot start-up device can drive a wind turbine without self-starting capability to gradually start the thermal power unit, without increasing the starting cost, and improving the starting speed and economy.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0084] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

Claims

1. A method for hot-starting a thermal power unit with the assistance of a wind turbine generator, characterized in that, The method includes: Obtain the starting power of the thermal power unit, and determine the target number of wind turbine units to be started based on the starting power of the thermal power unit; Determine the capacity of the external auxiliary power supply based on the target number of wind turbine units to be started; Based on the capacity of the external auxiliary power supply, the target number of wind turbine auxiliary machines are started by the external power supply to achieve hot start of the thermal power unit.

2. The method according to claim 1, characterized in that, The step of determining the target number of wind turbine units to be started based on the starting power of the thermal power units includes: Obtain the current continuous effective output power of the wind turbine; Based on the current continuous effective output power of the wind turbine and the starting power of the thermal power unit, the target number of wind turbines to be started is determined by calculation.

3. The method according to claim 1, characterized in that, Determining the capacity of the external auxiliary power supply based on the target number of wind turbine units to be started includes: Calculate the auxiliary power of the wind turbines to be started based on the target number of wind turbines to be started; The capacity of the external auxiliary power supply is determined based on the auxiliary power of the wind turbine generator set.

4. The method according to claim 1, characterized in that, The process of starting the auxiliary generators of the target number of wind turbine units based on the capacity of the external auxiliary power supply to achieve hot start of the thermal power unit includes: Based on the capacity of the external auxiliary power supply, when the external power supply starts the target number of wind turbine auxiliary machines, a frequency regulation control strategy is added to the wind turbine to control the wind farm frequency. After the auxiliary equipment of the target number of wind turbine units is started by an external power source, the wind turbine units capture wind energy and output power stably, thereby realizing the hot start of the thermal power unit.

5. An operating device for assisting the hot start of a thermal power unit with a wind turbine generator, characterized in that, The device includes: The acquisition module is used to acquire the starting power of the thermal power unit and determine the target number of wind turbine units to be started based on the starting power of the thermal power unit. The determination module is used to determine the capacity of the external auxiliary power supply based on the target number of wind turbine units to be started; The starting module is used to start the auxiliary equipment of the target number of wind turbine units based on the capacity of the external auxiliary power supply, thereby realizing the hot start of the thermal power unit.

6. The apparatus according to claim 5, characterized in that, The acquisition module is specifically used for: Obtain the current continuous effective output power of the wind turbine; Based on the current continuous effective output power of the wind turbine and the starting power of the thermal power unit, the target number of wind turbines to be started is determined by calculation.

7. The apparatus according to claim 5, characterized in that, The determining module is specifically used for: Calculate the auxiliary power of the wind turbines to be started based on the target number of wind turbines to be started; The capacity of the external auxiliary power supply is determined based on the auxiliary power of the wind turbine generator set.

8. The apparatus according to claim 5, characterized in that, The startup module is specifically used for: Based on the capacity of the external auxiliary power supply, when the external power supply starts the target number of wind turbine auxiliary machines, a frequency regulation control strategy is added to the wind turbine to control the wind farm frequency. After the auxiliary equipment of the target number of wind turbine units is started by an external power source, the wind turbine units capture wind energy and output power stably, thereby realizing the hot start of the thermal power unit.

9. An electronic device, comprising: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-4.

10. A computer storage medium, wherein, The computer storage medium stores computer-executable instructions; when executed by a processor, the computer-executable instructions can implement the method described in any one of claims 1-4.

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