Wind and fire bundling system external sending and new energy consumption optimization regulation method and system

Abstract

This disclosure proposes an optimized control method and system for the power transmission and renewable energy consumption of a bundled wind-fired power system, including the following steps: Under the high-output mode of thermal power units, a dynamic reactive current proportional coefficient is set; renewable energy units are connected to the grid according to the set renewable energy grid connection ratio; thermal power units are disconnected according to the set number of units to be switched off under stability control; transient stability verification is performed; the system load is increased to reduce the power transmission flow until the transient power angle and transient voltage stabilize, obtaining the first power transmission flow of the stabilized system; under the first power transmission flow, the output of renewable energy units is increased; thermal power units are disconnected according to the set number of units to be switched off under stability control, and transient stability verification is performed; by gradually reducing the output of renewable energy units until the wind-fired power system is transiently stable, the output value of renewable energy units is obtained. This disclosure addresses the limitation of renewable energy consumption capacity due to transient frequency and voltage constraints, proposing an optimized stability control strategy that effectively improves renewable energy consumption capacity without affecting the power transmission capacity.

Description

Technical Field

[0001] This disclosure relates to the technical field of power system regulation, specifically to methods and systems for optimizing the regulation of wind and thermal power bundled transmission systems and renewable energy consumption. Background Technology

[0002] The statements in this section are merely background information relating to this disclosure and do not necessarily constitute prior art.

[0003] The inverse distribution between power resources and electricity load, coupled with the volatility and randomness of renewable energy generation, makes the intensive development of renewable energy and the centralized transmission of bundled wind, solar, and thermal power plants a crucial measure in building a new power system, and also a relatively rational approach to energy development and utilization. However, this approach combines renewable energy with ultra-high-voltage direct current (UHVDC) and synchronous generating units, leading to the intertwining of power electronic equipment and its control systems with traditional AC systems. The interaction of control laws and operating characteristics makes the system stability mechanism more complex. Therefore, studying the transient stability problems of large-capacity renewable energy connected to the power system, including power angle, voltage, frequency stability, and stability control measures, has significant theoretical and engineering practical value.

[0004] The inventors discovered that the current wind-thermal power bundling system, which generally employs a combined wind and thermal power control strategy, suffers from insufficient power transmission capacity when the thermal power unit operates at high output and the wind power unit operates at zero output. This is due to limitations in transient power angle and voltage stability after a cross-line fault in the interconnection channel. Conversely, when the thermal power unit operates at low output and the wind power unit operates at high output, the system's total wind power output is limited by transient frequency stability after a cross-line fault in the interconnection channel. According to power balance results, this results in a high surplus power in the wind-thermal power bundling system. During periods of high wind, the wind power generation simulcast rate is often above 70%, further increasing the surplus power. Therefore, the weak power transmission capacity of the wind-thermal power bundling system is severely limited by transient power angle, voltage, and frequency stability after a cross-line fault in the interconnection channel, resulting in insufficient overall power transmission capacity and insufficient absorption capacity of new energy sources (such as wind power). Summary of the Invention

[0005] To address the aforementioned issues, this disclosure proposes an optimized control method and system for the transmission and consumption of renewable energy in a bundled wind and thermal power system. Considering the limitations imposed by transient frequency and voltage on the system, which restricts renewable energy consumption capacity, an optimized stability control strategy is proposed, which effectively enhances renewable energy consumption capacity without affecting transmission capacity.

[0006] To achieve the above objectives, the present disclosure adopts the following technical solution:

[0007] One or more embodiments provide a method for optimizing and controlling the transmission of wind and thermal power bundled systems and the consumption of new energy sources, including the following steps:

[0008] Under the high-output mode of thermal power units, a dynamic reactive current ratio coefficient is set, new energy units are connected to the grid according to the set new energy grid connection ratio, and thermal power units are cut off according to the set number of stable control units. Transient stability verification is carried out, the system load is increased to reduce the power flow to the outside, until the transient power angle and transient voltage are stable, and the first power flow to the outside of the system after stability is obtained.

[0009] Under the first wave of power transmission, increase the output of new energy units, cut off thermal power units according to the set number of units to be cut off for stability control, and perform transient stability verification. By gradually reducing the output of new energy units until the wind and thermal power bundling system is transiently stable, the output value of new energy units can be obtained.

[0010] One or more embodiments provide a wind-thermal baling system for power transmission and a renewable energy consumption optimization and control system, including:

[0011] External power flow determination module: It is configured to set a dynamic reactive current ratio coefficient under the high output mode of thermal power units, connect new energy units according to the set new energy grid connection ratio, cut off thermal power units according to the set number of stable control units, perform transient stability verification, increase system load to reduce external power flow, until the transient power angle and transient voltage are stable, and obtain the first external power flow of the stable system.

[0012] The new energy output determination module is configured to increase the output of new energy units under the first power transmission flow, cut off thermal power units according to the set number of units to be cut off for transient stability verification, and obtain the output value of new energy units by gradually reducing the output of new energy units until the wind and thermal power bundling system is transiently stable.

[0013] An electronic device includes a memory and a processor, as well as computer instructions stored in the memory and running on the processor, wherein the computer instructions, when executed by the processor, perform the steps described in the above method.

[0014] A computer-readable storage medium for storing computer instructions, which, when executed by a processor, perform the steps described in the above method.

[0015] Compared with the prior art, the beneficial effects of this disclosure are as follows:

[0016] Under the verification method disclosed herein, when new energy sources replace the output of thermal power units, the amplitude of the first swing of the power angle curve decreases, thereby improving the transient stability level of the system. The dynamic reactive current ratio coefficient is taken into account, which enhances the reactive voltage support of the system during faults, improves the transient power angle and voltage stability level, and maximizes the release of external transmission capacity.

[0017] The advantages of this disclosure, as well as its additional advantages, will be described in detail in the following specific embodiments. Attached Figure Description

[0018] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute a limitation thereof.

[0019] Figure 1 This is a flowchart of the control method of Embodiment 1 of this disclosure;

[0020] Figure 2 This is the power angle curve of wind power with different grid connection ratios using the control method of this embodiment in the simulation experiment of Embodiment 1 of this disclosure;

[0021] Figure 3 The voltage curves of wind power at different grid connection ratios are obtained by using the control method of this embodiment in the simulation experiment of Embodiment 1 of this disclosure. Detailed Implementation

[0022] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0023] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of this disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains.

[0024] It should be noted that the terminology used herein is for descriptive purposes only and is not intended to limit the exemplary embodiments according to this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. It should be noted that, without conflict, the various embodiments and features within those embodiments can be combined with each other. The embodiments will now be described in detail with reference to the accompanying drawings.

[0025] As described in the background section, the power angle and voltage instability of wind-thermal bundled systems are mainly caused by long-chain, long-distance power transmission, while frequency issues are primarily related to thermal power plant shutdown strategies and the low-voltage ride-through process of wind turbines. For wind-thermal bundled systems with weak external transmission, wind power integration helps improve the system's power angle characteristics, and the overall transmission capacity is mainly constrained by the power angle and voltage stability issues under high-output thermal power units (zero wind power output). Currently, the external transmission capacity verification method often involves completely shutting down wind turbines, without considering that even if the active power output of wind turbines is zero after grid connection, they will still provide reactive power support during the low-voltage ride-through process. This verification method is inconsistent with reality. Furthermore, with the increase in wind power grid capacity, frequency issues have become more prominent. The active power deficit caused by low voltage ride-through of wind turbines and the shutdown of thermal power plants has further increased, leading to frequency stability problems. This disclosure considers improving the shutdown strategy to address this issue and provides a method for regulating the system's power transmission capacity and renewable energy absorption capacity. The method is simple and fast, and can effectively improve the renewable energy absorption capacity without affecting the power transmission capacity, thus effectively ensuring grid security and renewable energy absorption. Specific embodiments are described below.

[0026] Example 1

[0027] In one or more of the technical solutions disclosed in the embodiments, such as Figure 1 As shown, the optimized control method for wind and thermal power baling systems for power transmission and renewable energy consumption includes the following steps:

[0028] Step 1: Under the high-output mode of the thermal power unit, set the dynamic reactive current proportional coefficient. K 1. Connect new energy units to the grid according to the set new energy grid connection ratio, and cut off the number of units according to the set stability control requirements. N 1. Disconnect the thermal power units, perform transient stability verification, increase the system load to reduce the power flow to the outside, until the transient power angle and transient voltage stabilize, and obtain the first power flow to the outside of the system after stabilization. P W ;

[0029] Step 2, in the first delivery trend P W To increase the output of new energy units, the number of units switched off should be adjusted according to the set stability control parameters. N 1. Disconnect the thermal power units and perform transient stability verification. Gradually reduce the output of the new energy units until the wind-thermal bundled system is transiently stable to obtain the output value of the new energy units. N W1 That is, the capacity for new energy consumption is N W1 .

[0030] In the verification method of this embodiment, the access of new energy replaces the output of thermal power units, the amplitude of the first swing of the power angle curve decreases, the transient stability level of the system is improved, the dynamic reactive current ratio coefficient is considered, the reactive voltage support of the system during the fault period is enhanced, the transient power angle and voltage stability level are improved, and the external transmission capacity is released to the maximum extent.

[0031] First, the system is checked under high-output mode of thermal power units to determine the power transmission capacity. Second, on the basis of ensuring the power transmission capacity, renewable energy is connected to replace the output of thermal power units, which helps to improve the power angle characteristics of the system. Transient stability is checked, and the output of renewable energy units is gradually reduced until the system is transiently stable. Optimizing the number of thermal power units to be switched off greatly reduces the impact on the system frequency, thereby ensuring the renewable energy absorption capacity. The balance point between power transmission flow and renewable energy absorption capacity can be quickly determined, and both the power transmission capacity and renewable energy absorption capacity of the system can be guaranteed at the same time.

[0032] In a further technical solution, in step 1, the system is set as the new energy grid connection ratio according to the average grid connection ratio of new energy units in the region where the wind and fire bundling system of this embodiment is located, and the new energy is incorporated during the verification stage.

[0033] Furthermore, in step 1, the active power output of the integrated new energy unit is set to zero, and the dynamic reactive current proportional coefficient is set to zero. K 1 is set to the minimum value required by the national standard, that is K 1 = 1.5.

[0034] The reactive current increment Δ of the wind-fire bundling system I t for:

[0035] (1)

[0036] In the formula: △ I t This is the increase in reactive current. K 1 represents the reactive current proportionality coefficient. U t This is the per-unit value of the grid connection point voltage. I N This is the rated current of the unit.

[0037] In this embodiment, due to the actual proportional coefficient of each new energy unit K 1 is uncertain, referring to the dynamic reactive current proportional coefficient of new energy units. K Setting 1 to the minimum value required by national standards and adjusting it according to the obtained transmission capacity can improve the reliability of the system.

[0038] Specifically, in step 1, the renewable energy units can be started up according to the average grid connection ratio in power system electromechanical transient simulation software (PSASP or BPA), with the active power output of a single unit being 0MW. Simultaneously, the dynamic reactive current ratio coefficient is set in the renewable energy simulation model. K 1. Set to the minimum value required by national standards, 1.5. With all thermal power units in the region running at full capacity, consider the number of thermal power units to be shut down for stability control. N 1. Perform transient stability verification by gradually increasing the regional load to reduce the system's power transmission flow until the transient power angle and transient voltage stabilize. Record the system's power transmission flow value at this point. P W .

[0039] In step 1, the high-output mode of the thermal power unit is: the thermal power unit is fully powered and operating at full capacity.

[0040] In step 1, increasing local load to reduce power transmission flow means increasing the load in the area where the wind-fire bundled system is located, thereby reducing power transmission flow.

[0041] In step 2, transient stability verification is performed by gradually reducing the output of the renewable energy units until the wind-thermal bundled system achieves transient stability, thereby obtaining the output value of the renewable energy units. N W1 It may include the following steps:

[0042] Step 21: Maintain the system's outbound delivery flow as the primary outbound delivery flow. P W Under the minimum operating and minimum technical output of regional thermal power units, a set number N1 thermal power units are shut down, the output of new energy units is increased, transient stability is checked, and the output of new energy units is gradually reduced until the transient power angle and transient voltage stabilize, thus obtaining the initial output of new energy units. N W ;

[0043] Step 22: Maintain the system's outbound delivery flow as the primary outbound delivery flow. P W Under the minimum operating and minimum technical output conditions of regional thermal power units, the active power of the new energy units is restored according to the set active power recovery rate of the new energy units. Transient frequency and overvoltage checks are performed, and the output of the new energy units is gradually reduced until the transient frequency and transient overvoltage do not exceed the limits, thus obtaining the final output of the new energy units. N W1 .

[0044] Furthermore, optionally, the active power recovery rate (RRPWR) of the new energy source can be set to the minimum value required by the national standard, which is 20%. P N / s.

[0045] In this embodiment, the impact of the active power recovery speed on transient frequency and overvoltage of the grid-connected renewable energy unit after fault clearance is considered. By setting the active current recovery speed to the minimum value required by the national standard and adjusting it according to the obtained renewable energy absorption capacity, the stability and reliability of the system can be guaranteed.

[0046] The initial stage output of the new energy unit in step 22 is N W In the new energy simulation model, the active power recovery rate (RRPWR) after fault clearance can be set to the minimum value of 20% required by national standards. P N / s, considering the number of thermal power units to be shut down under stabilization control. N 1. Perform transient frequency and overvoltage checks by gradually reducing the output of the new energy units until the transient frequency and transient overvoltage do not exceed the limits. Record the output of the new energy units at this point. N W1 The system's external transmission capacity is then... P W The new energy consumption capacity is N W1 .

[0047] In the technical solution of this embodiment, for the wind-thermal bundled system, keeping the start-up mode of the external transmission and new energy synchronous machine unchanged, appropriately increasing the wind power access capacity is beneficial to improving the power angle characteristics, but it will deteriorate the frequency characteristics and cause the minimum frequency to drop; increasing the active current recovery speed and active current calculation coefficient can effectively improve the system frequency characteristics, while having little impact on the power angle characteristics, and meeting the minimum limits specified for the active current recovery speed and active current calculation coefficient.

[0048] Further technical solutions, such as the capacity for renewable energy absorption. N W1 The failure to meet the regional renewable energy consumption demand also includes step 3, which involves optimizing the renewable energy consumption capacity. This can be achieved by adopting optimized thermal power unit stabilization and tripping strategies. Specifically: if the renewable energy consumption capacity... N W1 If the regional renewable energy consumption demand is not met, the number of thermal power units that are controlled to be switched off (i.e., the number of N1 units) will be reduced sequentially. Step 2 will be executed to re-perform transient stability verification to obtain the renewable energy consumption capacity under different controlled thermal power unit switching numbers, thus obtaining the maximum renewable energy consumption capacity. N W2 And the corresponding number of thermal power unit stability control and switching machines. N 2.

[0049] Optionally, the number of thermal power units to be controlled and switched off can be reduced sequentially. The number of thermal power units to be switched off can be at least 1, and the number of controlled and switched-off units can be N1-1, N1-2, ..., N1-n, where n>2.

[0050] Specifically, steps 1-2 involve setting the number of thermal power units to be switched off to N1 using a stable switching strategy, with the system's power transmission capacity being... P W and new energy consumption capacity N W1 Steps 1-3 are performed when considering optimizing the power plant stabilization and shutdown strategy, i.e., reducing the number of thermal power units N1 that are stabilized and shut down.

[0051] The stabilization strategy is as follows: During the verification process, the number of thermal power units to be switched off is determined based on the actual output of the new energy units, i.e., when the actual output of the new energy units is less than... N W1 At that time, the number of thermal power units that were controlled and shut down was: N 1; When the actual output of the new energy unit is greater than N W1 and not exceeding N W2 At that time, the number of thermal power units that were controlled and shut down was: N 2. At this time, the output of the new energy unit is N W2 .

[0052] To demonstrate the effectiveness of the method in this embodiment, simulation calculations were performed using the Power System Analysis and Synthesis Program (PSASP). Taking a certain region as an example, the simulation results were verified according to the method in this embodiment, and are shown in Tables 1 and 2.

[0053] Table 1. Verification of Delivery Capacity

[0054]

[0055] As shown in Table 1, the transmission capacity obtained by the algorithm in this embodiment increases with the grid connection of wind power and the increase of the grid connection ratio. That is, the control method in this embodiment can effectively release the transmission capacity of the wind-thermal bundled system.

[0056] like Figure 2-3 As shown in the figure, the increased grid connection ratio of wind turbines enhances reactive power support during faults, which is more conducive to system power angle and voltage stability, thus improving power transmission capacity. This verification scheme can improve power transmission capacity without changing existing stability control measures, and has certain reference value for temporarily alleviating voltage stability problems and stability problems involving the intertwining of power angle and voltage.

[0057] Table 2 Verification of New Energy Absorption Capacity

[0058]

[0059] As shown in Table 2, the method in this embodiment optimizes the stable control and switching strategy, which can effectively improve the renewable energy consumption capacity and is of great significance for alleviating the limitation of renewable energy consumption.

[0060] The optimized safety and stability verification and control scheme in this embodiment can effectively improve the overall power transmission capacity and wind power absorption capacity of the region, and can be used as a temporary transitional measure to alleviate the limitation of wind power absorption.

[0061] Example 2

[0062] Based on Example 1, this example provides a wind-thermal baling system for power transmission and a renewable energy consumption optimization and control system, including:

[0063] External power flow determination module: Configured to set a dynamic reactive current proportional coefficient under high-output thermal power unit conditions, connect new energy units to the grid according to the set new energy grid connection ratio, and cut off the number of units according to the set stability control parameters. N 1. Disconnect the thermal power unit, perform transient stability check, increase the system load to reduce the power flow to the outside, until the transient power angle and transient voltage are stable, and obtain the first power flow to the outside of the system after the system is stabilized;

[0064] New energy output determination module: Configured to increase the output of new energy units under the first power transmission load, and to control the number of units to be switched off according to a set schedule. N 1. Disconnect the thermal power units and perform transient stability verification. Gradually reduce the output of the new energy units until the wind-thermal bundling system is transiently stable, and obtain the output value of the new energy units.

[0065] It should be noted that each module in this embodiment corresponds one-to-one with each step in Embodiment 1, and their specific implementation processes are the same, so they will not be repeated here.

[0066] Example 3

[0067] This embodiment provides an electronic device, including a memory and a processor, as well as computer instructions stored in the memory and running on the processor. When the processor executes the computer instructions, it performs the steps described in the method of Embodiment 1.

[0068] Example 4

[0069] This embodiment provides a computer-readable storage medium for storing computer instructions, which, when executed by a processor, complete the steps described in the method of Embodiment 1.

[0070] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

[0071] While the specific embodiments of this disclosure have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this disclosure. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of this disclosure are still within the scope of protection of this disclosure.

Claims

1. A method for optimizing and controlling the transmission and consumption of renewable energy through a wind-fired power baling system, characterized in that, Includes the following steps: Under the high-output mode of thermal power units, a dynamic reactive current proportional coefficient is set, and new energy units are connected to the grid according to the set proportion of new energy units. Thermal power units are disconnected according to the set number of units to be switched off for stability control. Transient stability verification is performed, and the system load is increased to reduce the power flow to the outside until the transient power angle and transient voltage are stable, thus obtaining the first power flow to the outside of the system after stability. The high-output mode of thermal power units refers to the state in which all thermal power units are running and operating at full capacity. Under the initial power transmission surge, the output of renewable energy units is increased, and thermal power units are cut off according to the set number of units to be controlled for stability. Transient stability verification is performed. By gradually reducing the output of renewable energy units until the wind-thermal power bundling system is transiently stable, the output value of renewable energy units is obtained. This includes the following steps: Maintaining the system's power transmission flow as the primary power transmission flow, and under the minimum operating and minimum technical output of regional thermal power units, cut off a set number of thermal power units, increase the output of renewable energy units, perform transient stability checks, and gradually reduce the output of renewable energy units until the transient power angle and transient voltage stabilize, thus obtaining the initial output of renewable energy units. N W ; Maintaining the system's power transmission flow as the primary power transmission flow, with the output of new energy units as the main source of power. N W In the initial state, under the minimum start-up and minimum technical output of the regional thermal power units, the active power of the new energy units is restored according to the set active power recovery rate of the new energy units. Transient frequency and overvoltage checks are performed, and the output of the new energy units is gradually reduced until the transient frequency and transient overvoltage do not exceed the limits, thus obtaining the final output of the new energy units. N W1 .

2. The method for optimizing and controlling the transmission and consumption of new energy from a wind-fired power baling system as described in claim 1, characterized in that: Set the dynamic reactive current proportional coefficient to 1.5; Alternatively, the system's renewable energy grid connection ratio can be set according to the average grid connection ratio of renewable energy units in the region where the wind and fire bundled system is located.

3. The method for optimizing and controlling the transmission and consumption of new energy from a wind-fired power baling system as described in claim 1, characterized in that: Increasing local load to reduce external power flow refers to increasing the load in the area where the wind-fire bundled system is located, thereby reducing the external power flow.

4. The method for optimizing and controlling the transmission and consumption of new energy from a wind-fired power baling system as described in claim 1, characterized in that: The set active power recovery rate for new energy sources is 20%. P N / s.

5. The method for optimizing and controlling the transmission and consumption of new energy from a wind-fired power baling system as described in claim 1, characterized in that: If the obtained output value of the new energy unit N W1 If the regional renewable energy consumption demand cannot be met, the number of thermal power units that are controlled for stability will be reduced sequentially, and a new transient stability check will be performed to obtain the renewable energy consumption capacity under different controlled thermal power unit shutdown numbers, thus obtaining the maximum renewable energy consumption capacity. N W2 And the corresponding number of thermal power unit stabilization and shutdown machines; The method for re-verifying transient stability is as follows: under the first power transmission flow, increase the output of new energy units, cut off thermal power units according to the reduced number of units to be cut off for transient stability verification, and gradually reduce the output of new energy units until the wind-thermal bundled system is transiently stable to obtain the output value of new energy units.

6. The method for optimizing and controlling the transmission and consumption of new energy from a wind-fired power baling system as described in claim 5, characterized in that: During the verification process, the number of thermal power units to be switched off is determined based on the actual output of the new energy units: when the actual output of the new energy units is less than... N W1 At that time, the number of thermal power units that were controlled and shut down was: N 1; When the actual output of the new energy unit is greater than N W1 and not exceeding N W2 At that time, the number of thermal power units that were controlled and shut down was: N 2. At this time, the output of the new energy unit is N W2 .

7. A wind-fired power baling system for external transmission and a new energy consumption optimization and control system, characterized in that, include: External power flow determination module: Configured to set a dynamic reactive current proportional coefficient under the high-output mode of thermal power units, connect new energy units according to the set new energy grid connection ratio, disconnect thermal power units according to the set number of units to be cut off for stability control, perform transient stability verification, increase system load to reduce external power flow, until the transient power angle and transient voltage stabilize, and obtain the first external power flow of the system after stability; the high-output mode of thermal power units refers to the state in which all thermal power units are running and operating at full capacity; The new energy output determination module is configured to increase the output of new energy units under the first power transmission flow, cut off thermal power units according to the set number of units to be controlled and cut off, perform transient stability verification, and obtain the output value of new energy units by gradually reducing the output of new energy units until the wind-thermal bundled system is transiently stable. The module includes the following steps: Maintaining the system's power transmission flow as the primary power transmission flow, and under the minimum operating and minimum technical output of regional thermal power units, cut off a set number of thermal power units, increase the output of renewable energy units, perform transient stability checks, and gradually reduce the output of renewable energy units until the transient power angle and transient voltage stabilize, thus obtaining the initial output of renewable energy units. N W ; Maintaining the system's power transmission flow as the primary power transmission flow, with the output of new energy units as the main source of power. N W In the initial state, under the minimum start-up and minimum technical output of the regional thermal power units, the active power of the new energy units is restored according to the set active power recovery rate of the new energy units. Transient frequency and overvoltage checks are performed, and the output of the new energy units is gradually reduced until the transient frequency and transient overvoltage do not exceed the limits, thus obtaining the final output of the new energy units. N W1 .

8. An electronic device, characterized in that, It includes a memory and a processor, as well as computer instructions stored in the memory and running on the processor, which, when executed by the processor, perform the steps of any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, Used to store computer instructions, which, when executed by a processor, perform the steps of any one of claims 1-6.

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