Accurate load control system power restoration method adapted to new power system

Abstract

The application discloses a kind of accurate load control system power supply recovery methods suitable for new power system, comprising: the priority of each user's power supply recovery is sequentially set as first priority, second priority and third priority from high to low, the first priority according to the compensation fee of power company and user economic loss fee in unit time;The second priority according to the restart time of each user after power supply recovery;The third priority according to the economic loss caused by each user unit time every loss preset load.Based on the research on the power consumption characteristics of power users, a set of specific strategies for orderly and rapid recovery of power supply after the accident is proposed, which can improve economic efficiency and enhance the power experience of users under the premise of ensuring the safe and stable operation of power grid system, and further improve the level of source network load interaction of power system, create more value for society.

Description

Technical Field

[0001] This invention relates to the field of power system technology, and more specifically to a power supply restoration method for a precision load control system adapted to new power systems. Background Technology

[0002] Currently, precision load control systems have been put into operation in many regions. When a serious fault occurs in the power grid, such as the simultaneous or successive loss of multiple inter-regional DC lines, the system can automatically trip branch switches and briefly interrupt the power supply to all loads under the branch switches through remote millisecond-level control. This avoids the risk of the power grid frequency dropping rapidly due to a large power deficit, which could trigger multiple rounds of low-frequency load shedding, large-scale load shedding, or even power grid frequency collapse, causing a large-scale blackout across the entire grid.

[0003] Under current methods, compensation standards for electricity users are typically determined by the power of the controlled load, with the specific compensation amount calculated based on the duration of control. Generally, the longer the control time, the greater the impact on users, and the higher the compensation cost. Existing technologies lack the design of power restoration strategies for precise load control systems and lack an efficient and mature management system to further improve the collaborative interaction between power generation, grid, and load, thereby creating more value for society. Summary of the Invention

[0004] The purpose of this invention is to provide a power supply restoration method for a precision load control system adapted to new power systems. It aims to address the problem of the lack of power supply restoration strategies for precision load control systems in existing technologies.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] This invention provides a power supply restoration method for a precision load control system adapted to new power systems, comprising:

[0007] The priority for restoring power to each user is set from highest to lowest as first priority, second priority, and third priority, respectively.

[0008] The first priority is to sort the power supply restoration order of each user according to the compensation fee of the power company and the economic loss fee of the user per unit time.

[0009] The first priority is to sort the order of power restoration for each user based on the compensation fee paid by the power company to each user per unit time and the economic loss fee paid by the user.

[0010] The second priority is: based on the restart time of each user after power restoration and on the basis of the first priority, the order in which power restoration of each user is ordered is sorted.

[0011] The third priority is: based on the economic loss caused by the loss of a preset load per unit time for each user, and based on the first priority and the second priority, the order of power restoration for each user is sorted.

[0012] Preferably, the step of determining the power supply restoration order based on the power company's compensation fee and the user's economic loss fee per unit time for each user specifically involves:

[0013] Calculate the difference between the user's economic loss and the power company's compensation within the unit time period, and sort the order of power restoration for each user according to the magnitude of the difference.

[0014] Preferably, if the economic loss of a user is greater than the compensation fee paid by the power company within the unit time, the user is defined as a large user enterprise, and power supply is restored to each user in sequence according to the difference between the economic loss of each user and the compensation fee paid by the power company within the unit time.

[0015] Preferably, each user is defined as follows: based on the difference between the economic loss cost of each user and the compensation cost of the power company per unit time.

[0016] Category A precise load users are users whose economic losses do not exceed the compensation fees paid by the power company per unit time.

[0017] Category B precise load users are users whose economic losses exceed the compensation from the power company per unit time, and whose economic losses are no more than ten times the compensation from the power company per unit time.

[0018] Category C precise load users are users whose economic losses exceed ten times the compensation fee paid by the power company per unit time.

[0019] Preferably, the step of sorting the order of power restoration for each user based on the restart time after power restoration and on the basis of the first priority specifically involves: sorting the order of power restoration for each user according to the length of the restart time after power restoration.

[0020] Preferably, based on the restart time T after power restoration for each user, each user is sequentially set to four levels, including:

[0021] Level 1: The restart time T after power restoration shall not be less than 60 minutes;

[0022] Level 2: The restart time T after power restoration is less than 60 minutes and not less than 30 minutes;

[0023] Level 3: The restart time T after power restoration is less than 30 minutes and not less than 10 minutes;

[0024] Level 4: The restart time T after power restoration is less than 10 minutes.

[0025] The users are then divided based on the first priority.

[0026] Preferably, the order of power restoration for each user is sorted based on the economic loss caused by the loss of a preset load per unit time, and based on the first priority and the second priority. Specifically, this involves:

[0027] Based on the order of economic losses caused by the loss of preset load per unit time for each user, and based on the first priority and the second priority, the order of power restoration for each user is sorted.

[0028] Preferably, the preset load is a 1kW load.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] Based on a survey of the electricity consumption characteristics of power users, this invention proposes a specific strategy for orderly and rapid power restoration after an accident. This strategy can improve economic efficiency and enhance the user's electricity experience while ensuring the safe and stable operation of the power grid system. It can also further improve the level of coordinated interaction between the power source, grid, and load in the power system, creating more value for society. Attached Figure Description

[0031] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0032] Figure 1 A logical schematic diagram of a power supply restoration method for a precision load control system adapted to a new type of power system, provided as an embodiment of the present invention. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 The specific embodiments of the present invention provide a more detailed description of the power supply restoration method for a precision load control system adapted to a new type of power system. The advantages and features of the present invention will become clearer from the following description. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, used only to facilitate and clearly illustrate the embodiments of the present invention. Please refer to the accompanying drawings to make the objectives, features, and advantages of the present invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of the present invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives achieved by the present invention, should still fall within the scope of the technical content disclosed in the present invention.

[0034] Once the frequency control system has fully activated, the power grid returns to a stable operating state. Since precise load shedding is performed remotely by the power company without prior notice, prolonged power outages put significant pressure on the normal operation of large users. Therefore, while ensuring the safe and stable operation of the power grid, it is necessary to orderly restore power to the shedding loads of these large users. However, as the load capacity connected to the precise load control system continues to increase, large-scale short-term power restoration may cause a sharp increase in power flow, leading to another drop in grid frequency and triggering the system's automatic safety devices to restart. Furthermore, because the types of large user loads vary, their requirements for power restoration time differ: for some large users, the economic loss caused by power outages is minimal, and the compensation from the power company can fully compensate for the economic losses caused by the power outage, resulting in revenue generation; however, for another type of large user load, the longer the power outage, the greater the economic loss. Therefore, based on the above research and analysis, the following three principles must be ensured when formulating power restoration strategies:

[0035] (1) Ensure the safe and stable operation of the system. Once the higher-level dispatching agency confirms that the power grid frequency has been restored to the normal operating level and the system has sufficient reserves, the orderly power restoration process will be initiated.

[0036] (2) Improve economic efficiency. Under the premise of ensuring safety, power supply should be restored in accordance with the principle of minimizing the economic loss of the system, and priority should be given to restoring power supply to enterprises that suffer greater losses due to power outages.

[0037] (3) Improve user experience. According to preliminary research, some large users of the precision load control system experience a recovery time of more than 1 hour when their power is cut off and restarted. The issuance of the power restoration command does not cause the user's power load to increase immediately. For such users, the power outage time should be shortened as much as possible to improve the power experience.

[0038] Given the lack of design for power restoration strategies for precision load control systems in existing technologies, such as Figure 1 As shown in the figure, this embodiment provides a power supply restoration method for a precision load control system adapted to a new type of power system, including: setting the power supply restoration priority of each user from high to low as first priority, second priority and third priority.

[0039] The first priority is as follows: based on the compensation fee of the power company and the economic loss fee of each user within a unit time, the order of power restoration for each user is sorted, the difference between the economic loss fee of the user and the compensation fee of the power company within a unit time is calculated, and the order of power restoration for each user is sorted according to the magnitude of the difference.

[0040] If the economic loss of a user exceeds the compensation fee paid by the power company within the unit time period, the user is defined as a large user enterprise, and power supply is restored to each user sequentially according to the difference between the economic loss of each user and the compensation fee paid by the power company within the unit time period.

[0041] Based on the difference between the economic loss cost Y2 of each user and the compensation cost Y1 of the power company per unit time, each user is defined as follows:

[0042] Category A precise load users are users whose economic loss cost Y2 is not greater than the compensation cost Y1 of the power company per unit time, i.e., Y2≤Y1.

[0043] Category B precise load users are users whose economic losses exceed the compensation from the power company within the unit time period, and whose economic losses are no more than ten times the compensation from the power company within the unit time period, i.e., 10*Y1≥Y2>Y1.

[0044] Category C precise load users are those whose economic losses exceed ten times the compensation fee paid by the power company per unit time, where Y2 > 10 * Y1. Figure 1 The result is Y2 >> Y1.

[0045] The second priority is: based on the restart time of each user after power restoration and on the basis of the first priority, the order of power restoration of each user is sorted, that is, the order of power restoration of each user is sorted according to the length of the restart time of each user after power restoration.

[0046] Continue to refer to Figure 1 As shown, based on the restart time T after power restoration for each user, each user is sequentially set into four levels, including: Level 1: the restart time T after power restoration is not less than 60 minutes; Level 2: the restart time T after power restoration is less than 60 minutes and not less than 30 minutes; Level 3: the restart time T after power restoration is less than 30 minutes and not less than 10 minutes; Level 4: the restart time T after power restoration is less than 10 minutes, so as to classify each user based on the first priority.

[0047] The third priority is as follows: based on the economic loss L caused by the loss of a preset load per unit time for each user, and on the basis of the first priority and the second priority, the order of power restoration for each user is sorted. That is, in the same type of load and the same restoration time category, when the restoration time is the same, priority is given to restoring power to large users whose economic losses are greater when the unit load is lost, thereby reducing the economic losses of large users under the premise that the compensation cost from the power company is equivalent.

[0048] Based on the magnitude of the economic loss caused by the loss of a preset load per unit time for each user, and on the basis of the first priority and the second priority, the order of power restoration for each user is sorted.

[0049] In this embodiment, the preset load is a 1kW load, that is, the order of power restoration for each user is based on the economic loss caused to the user by the loss of 1kW load per unit time, and is further sorted on the basis of the first priority and the second priority.

[0050] In summary, the power supply restoration method for a precision load control system adapted to the new power system proposed in this embodiment, based on a survey of the electricity consumption characteristics of power users, proposes a specific strategy for orderly and rapid power supply restoration after an accident. This method can improve economic efficiency and enhance the electricity consumption experience of users while ensuring the safe and stable operation of the power grid system. It can also further improve the level of coordinated interaction between the power source, grid, and load in the power system, creating more value for society.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] It should be noted that the apparatus and methods disclosed in the embodiments herein can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings show the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments herein. In this regard, each block in a flowchart or block diagram may represent a module, program, or part of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system to perform the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0053] In addition, the functional modules in the various embodiments of this article can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0054] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A method for power supply restoration of a precision load control system adapted to a new type of power system, characterized in that, include: The priority for restoring power to each user is set from highest to lowest as first priority, second priority, and third priority, respectively. The first priority is to sort the order of power restoration for each user based on the compensation fee paid by the power company to each user per unit time and the economic loss fee paid by the user. The second priority is: based on the restart time of each user after power restoration and on the basis of the first priority, the order in which power restoration of each user is ordered is sorted. The third priority is: based on the economic loss caused by each user losing a preset load per unit time, and based on the first priority and the second priority, the order of power restoration for each user is sorted. Based on the difference between the economic loss cost to each user and the compensation cost from the power company per unit time, each user is defined as follows: Category A precise load users are users whose economic losses do not exceed the compensation fees paid by the power company per unit time. Category B precise load users are users whose economic losses exceed the compensation from the power company per unit time, and whose economic losses are no more than ten times the compensation from the power company per unit time. Category C precise load users are users whose economic losses exceed ten times the compensation fee paid by the power company per unit time. Based on the restart time T after power restoration for each user, each user is sequentially assigned to four levels, including: Level 1: The restart time T after power restoration shall not be less than 60 minutes; Level 2: The restart time T after power restoration is less than 60 minutes and not less than 30 minutes; Level 3: The restart time T after power restoration is less than 30 minutes and not less than 10 minutes; Level 4: The restart time T after power restoration is less than 10 minutes. The users are then divided based on the first priority.

2. The power supply restoration method for a precision load control system adapted to a new type of power system as described in claim 1, characterized in that, The process of determining the power supply restoration order based on the power company's compensation fees and the users' economic losses per unit time for each user is as follows: Calculate the difference between the user's economic loss and the power company's compensation within the unit time period, and sort the order of power restoration for each user according to the magnitude of the difference.

3. The power supply restoration method for a precision load control system adapted to a new type of power system as described in claim 2, characterized in that, If the economic loss of a user exceeds the compensation fee paid by the power company within the unit time period, the user is defined as a large user enterprise, and power supply is restored to each user sequentially according to the difference between the economic loss of each user and the compensation fee paid by the power company within the unit time period.

4. The power supply restoration method for a precision load control system adapted to a new type of power system as described in claim 1, characterized in that, The method of sorting the order of power restoration for each user based on the restart time after power restoration and on the basis of the first priority is specifically as follows: the order of power restoration for each user is sorted according to the length of the restart time after power restoration.

5. The power supply restoration method for a precision load control system adapted to a new type of power system as described in claim 1, characterized in that, The method of prioritizing the order of power restoration for each user based on the economic loss caused by the loss of a preset load per unit time, and based on the first priority and the second priority, is as follows: Based on the magnitude of the economic loss caused by the loss of a preset load per unit time for each user, and on the basis of the first priority and the second priority, the order of power restoration for each user is sorted.

6. The power supply restoration method for a precision load control system adapted to a new type of power system as described in claim 5, characterized in that, The preset load is 1kW.

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