A method for evaluating and warning the carrying capacity of power grid dispatching and switching operations

Abstract

The present invention discloses a method for evaluating and warning the carrying capacity of power grid dispatching switching operations, which divides the evaluation of switching operation volume into static evaluation and dynamic evaluation. When the switching operation volume is statically evaluated and warned, the planned workload criterion judgment and the overlap criterion of key and sensitive planned workload are sequentially performed; when the switching operation volume is dynamically evaluated and warned, a work phase matrix of key work, sensitive work and near power transmission work in the unfinished tasks of each operating small class is established, and then a statistical analysis is established to summarize the calculation of the operation margin of each work task of each group of operating small classes that are not suspended, not powered and near the power transmission time, and the judgment and warning are performed by comparing the number of operating teams with margins with the number of required operating teams. The present invention dynamically and statically evaluates and warns the switching operation of the power grid, assists the dispatcher in realizing the delegation of work, and can realize the unit to improve the power supply reliability of the power grid.

Description

Technical Field

[0001] The invention relates to a power grid dispatching switching operation carrying capacity assessment and early warning method used in the field of power grid switching operation. Background Art

[0002] With the development of power grid construction, power grid planning and emergency repair work have increased rapidly, and the reliability requirements of the power grid have become higher and higher, which has brought new challenges to the precise control of the switching operation of the dispatching center. As the operation center of the power grid, the control center can timely discover the power risks of the power grid switching operation, quickly and reasonably delegate the switching operation tasks, and intuitively understand the power grid switching operation stage, which has become an indispensable objective requirement to improve the accuracy of the power grid switching work arrangement.

[0003] The delegation, control and analysis of operation tasks by the dispatcher are the main and important daily tasks of the distribution network dispatcher. During this period, it involves the evaluation of the switching operation volume of the power grid, the dispatch and allocation of the switching operation work, and the intuitive display of the switching operation task stage. The evaluation of the switching operation volume is the basis for the delegation of work. Whether the switching operation force is sufficient directly affects the dispatch and allocation of work and the improvement of power grid reliability. At present, the above work mainly adopts manual analysis by dispatchers, textual comparison and analysis of dispatch, and manual analysis of the progress of switching operations. This process consumes a lot of energy of dispatchers, and the accuracy of manual control and analysis is not high. The switching operation ability cannot be fully tapped, especially when the switching operation volume of the power grid or the power grid repair increases. The dispatcher cannot quickly and reasonably delegate the work, which affects the safe and stable operation of the power grid. In the evaluation of the amount of power grid switching operations, scholars have mainly discussed the bearing capacity of power grid maintenance work. Some scholars have proposed a safety production bearing capacity control method to reasonably arrange production maintenance, operation and operation plans to ensure the smoothness of safety production work; some scholars have proposed the design ideas of the power grid maintenance plan safety bearing capacity analysis system, taking into account the system's workflow, maintenance test quota standard library management, system statistical analysis and other functions. The above scholars have optimized the bearing capacity of power grid maintenance work from multiple angles, which has a reference role in this study, but they have not discussed the evaluation of power grid switching operations for daily planned work and emergencies separately. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for evaluating and warning the carrying capacity of power grid dispatching switching operations, which takes into account factors such as the importance level of the switching operation, the geographical location and the operation volume, and performs dynamic and static evaluation and warning on the power grid switching operations, assists dispatchers in delegating work, and enables units to improve the power supply reliability of the power grid.

[0005] A technical solution to achieve the above purpose is: a power grid dispatching switching operation carrying capacity assessment and early warning method, comprising the following steps:

[0006] Step 1: statically evaluate and warn the switching operation amount, including the following evaluation criteria:

[0007] Step 1.1, make a judgment based on the planned workload criterion, as follows:

[0008] N T (i)>N max

[0009] N max =n×k

[0010] Where: N T N is the number of tasks to be performed; max The maximum threshold of the work tasks of the operation group, n is the number of operation teams, k is the maximum number of tasks that each operation team can operate, and if the number of work tasks exceeds the maximum threshold of work tasks, an early warning is issued;

[0011] Step 1.2: Make a judgment based on the workload overlap criteria for key and sensitive plans, as follows:

[0012] if(N Z (i)>k Z &(min(ti-tj)≤T))

[0013] Where: Nz is the number of key tasks or sensitive tasks that need to be operated, kz is the threshold of the number of key tasks, the number of operating teams n, ti,tj is the difference between the decommissioning time or the difference between the recommissioning time, T is the threshold of the time difference, if the number of key tasks or sensitive tasks exceeds the maximum number of tasks that can be operated by the operating team, and the difference between the decommissioning time or the difference between the recommissioning time is less than or equal to the threshold of the time difference, then an early warning is issued;

[0014] Step 2: Dynamically evaluate and warn the switching operation amount. The specific method is as follows:

[0015] Step 2.1, establish the work phase matrix of key tasks, sensitive tasks and work near power transmission in the unfinished tasks of each small operation class, as follows:

[0016]

[0017] The horizontal axis of the matrix represents the working stages of key tasks, sensitive tasks and tasks close to power supply, including: not shut down, not power supply, and close to power supply time; the vertical axis of the matrix represents the various tasks of the operating team; the time of not shut down, not power supply, and close to power supply is assigned a value of 1;

[0018] Step 2.2, establish a statistical analysis of the operating margin of each task of each group of operating teams that are not shut down, not powered on, and close to power on time, as follows;

[0019]

[0020] Where: Ci = 0, indicating no operating margin; Ci = 1, indicating an operating margin;

[0021] Finally, the dynamic operation volume warning is carried out according to the following formula:

[0022]

[0023] Among them, i to N are the remaining planned work, Naz is the number of operating teams required for the emergency repair work, and if the number of operating teams with margin is less than the required number of operating teams, an early warning is issued, indicating that the operating force is insufficient.

[0024] The present invention establishes an evaluation and early warning system that can meet the needs of power grid planned switching operation volume, and establishes an evaluation and early warning system that meets the needs of power grid switching operation emergency repair work. It can dynamically inform dispatchers of the power grid switching capacity risk in advance, assist dispatchers in real-time switching operation force margin, assist dispatchers in reasonably and quickly coordinating and increasing switching operation force, and ensure the stability of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A static evaluation and early warning flow chart of a switching operation quantity of a power grid dispatching switching operation carrying capacity evaluation and early warning method of the present invention;

[0026] Figure 2 Dynamically arrange process diagrams for switching operation tasks;

[0027] Figure 3 The present invention provides a flow chart of dynamic evaluation and early warning of switching operation quantity of a power grid dispatching switching operation carrying capacity evaluation and early warning method. DETAILED DESCRIPTION

[0028] In order to better understand the technical solution of the present invention, the following is a detailed description through specific embodiments:

[0029] The invention discloses a method for evaluating and warning the carrying capacity of power grid dispatching switching operation, which divides the evaluation of switching operation into static evaluation and dynamic evaluation. The static evaluation analyzes the carrying capacity risk of power grid operation force under the planned working condition. The dynamic evaluation analyzes the carrying capacity risk of power grid operation force under the emergency event based on the current switching operation stage of the power grid.

[0030] The method comprises the following steps:

[0031] Step 1: Conduct static evaluation and early warning of the switching operation volume. Based on the grid planning work, the grid switching operation volume is evaluated in advance. According to the important switching operation tasks, the ability of grid switching operators and other factors, early warning of grid switching operation capacity risk is issued, and relevant teams are prompted to strengthen configuration to improve grid reliability. Figure 1 , specifically including the following evaluation criteria.

[0032] Step 1.1, make a judgment based on the planned workload criterion, as follows:

[0033] N T (i)>N max

[0034] N=n×k

[0035] max

[0036] Where: N T N is the number of tasks to be performed; max The maximum threshold of the work tasks of the operation group, n is the number of operation teams, k is the maximum number of tasks that each operation team can operate, and if the number of work tasks exceeds the maximum threshold of work tasks, an early warning will be issued.

[0037] Step 1.2: Make a judgment based on the workload overlap criteria for key and sensitive plans, as follows:

[0038] if(N Z (i)>k Z &(min(ti-tj)≤T))

[0039] In the formula: Nz is the number of key tasks or sensitive tasks that need to be operated, kz is the threshold value of the number of key tasks, the number of operating teams n is taken, ti,tj is the difference between the decommissioning time or the difference between the recommissioning time, T is the threshold value of the time difference, if the number of key tasks or sensitive tasks exceeds the maximum number of tasks that can be operated by the operating team, and the difference between the decommissioning time or the difference between the recommissioning time is less than or equal to the threshold value of the time difference, an early warning is issued.

[0040] Step 2: Dynamically evaluate and warn the switching operation volume. Emergency repairs are divided into critical repairs, serious repairs, and general repairs. For critical repairs and serious repairs, combined with the real-time power grid switching operation situation, the power grid switching operation margin under emergency repairs is dynamically evaluated, and warnings are issued to assist dispatchers in dispatching personnel and improve power grid reliability. The dynamic arrangement process of switching operation tasks is as follows: Figure 2 shown.

[0041] The process of dynamic evaluation and early warning system of switching operation volume is as follows: Figure 3 As shown, the specific method is as follows:

[0042] Step 2.1, establish the work phase matrix of key tasks, sensitive tasks and work near power transmission in the unfinished tasks of each small operation class, as follows:

[0043]

[0044] The horizontal axis in the matrix represents the working stages of key work, sensitive work and work close to power supply, including: not shut down, not power supply, and close to power supply time; the vertical axis in the matrix represents the various tasks of the operating team; the time when not shut down, not power supply, and close to power supply is assigned a value of 1.

[0045] Step 2.2, establish a statistical analysis of the operating margin of each task of each group of operating teams that are not shut down, not powered on, and close to power on time, as follows;

[0046]

[0047] Where: Ci = 0, indicating no operating margin; Ci = 1, indicating an operating margin;

[0048] Finally, the dynamic operation volume warning is carried out according to the following formula:

[0049]

[0050] Among them, i to N are the remaining planned work, Naz is the number of operating teams required for the emergency repair work, and if the number of operating teams with margin is less than the required number of operating teams, an early warning is issued, indicating that the operating force is insufficient.

[0051] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A method for evaluating and warning the carrying capacity of power grid dispatching and switching operations, characterized in that: The steps include: Step 1: statically evaluate and warn the switching operation amount, including the following evaluation criteria: Step 1.1, make a judgment based on the planned workload criterion, as follows: N T (i)>N max N=n×k max Where: N T N is the number of tasks to be performed; max The maximum threshold of the work tasks of the operation group, n is the number of operation teams, k is the maximum number of tasks that each operation team can operate, and if the number of work tasks exceeds the maximum threshold of work tasks, an early warning is issued; Step 1.2: Make a judgment based on the workload overlap criteria for key and sensitive plans, as follows: if( N Z (i)(k Z &(min(i-tj)≤T)) Where: N z is the number of key tasks or sensitive tasks to be performed, k z is the threshold of the number of key tasks, the number of operating teams n is taken, ti,tj is the difference between the decommissioning time or the difference between the recommissioning time, T is the threshold of the time difference, if the number of key tasks or sensitive tasks exceeds the maximum number of tasks that can be operated by the operating team, and the difference between the decommissioning time or the difference between the recommissioning time is less than or equal to the threshold of the time difference, then an early warning is issued; Step 2: Dynamically evaluate and warn the switching operation amount. The specific method is as follows: Step 2.1, establish the work phase matrix of key tasks, sensitive tasks and work near power transmission in the unfinished tasks of each small operation class, as follows: The horizontal axis of the matrix represents the working stages of key tasks, sensitive tasks and tasks close to power supply, including: not shut down, not power supply, and close to power supply time; the vertical axis of the matrix represents the various tasks of the operating team; the time of not shut down, not power supply, and close to power supply is assigned a value of 1; Step 2.2, establish a statistical analysis of the operating margin of each task of each group of operating teams that are not shut down, not powered on, and close to power on time, as follows; Where: Ci = 0, indicating no operating margin; Ci = 1, indicating an operating margin; Finally, the dynamic operation volume warning is carried out according to the following formula: Among them, i to N are the remaining planned work, Naz is the number of operating teams required for the emergency repair work, and if the number of operating teams with margin is less than the required number of operating teams, an early warning is issued, indicating that the operating force is insufficient.

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