Transformer area voltage drop theoretical loss analysis method

Abstract

The invention provides a transformer area voltage drop theoretical loss analysis method, comprising the following steps: S1, obtaining historical data of a target transformer area, the historical data comprising a transformer area point electric energy meter three-phase voltage value, a voltage of a user in the transformer area and a transformer area current; s2, preprocessing the historical data of the transformer area; s3, the voltage drop loss in the transformer area is determined based on the preprocessed historical data of the transformer area, through the method, the voltage drop loss in the transformer area can be accurately determined, on one hand, accurate data support can be provided for power dispatching, and on the other hand, accurate data support can be provided for power management in the transformer area.

Description

Technical Field

[0001] The invention relates to a power analysis method, in particular to a theoretical loss analysis method for voltage drop in a transformer area. Background Art

[0002] In the power system, the power supply range of a transformer is often defined as a substation. There will be multiple users and their electricity meters in the substation. During the power supply process, there will be voltage loss in the substation. The voltage loss provides data basis for the management of the power system, power dispatching, etc.

[0003] With the existing technology, it is difficult to accurately determine the voltage loss in the substation, which makes it difficult to make accurate power dispatching measures and corresponding power supply management.

[0004] Therefore, in order to solve the above technical problems, it is urgent to propose a new technical means. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a theoretical loss analysis method for voltage drop in a substation, which can accurately determine the voltage drop loss in the substation. On the one hand, it can provide accurate data support for power dispatching, and on the other hand, it can provide accurate data support for power management in the substation.

[0006] The present invention provides a method for analyzing the theoretical loss of voltage drop in a transformer area, comprising the following steps:

[0007] S1. Obtain historical data of the target area, the historical data including the three-phase voltage value of the energy meter at the area point, the voltage of the users in the area, and the current of the area;

[0008] S2. Preprocess the historical data of the station area;

[0009] S3. Determine the voltage drop loss within the substation based on the pre-processed historical data of the substation.

[0010] Furthermore, the voltage drop loss σ in the station area tatol Determined by:

[0011] σ tatol =σ tq +σ user ;

[0012] Where: tatol is the voltage drop loss in the station area, σ user It is the loss of the user's electric meter in the area.

[0013] Furthermore, the voltage drop loss in the station area is determined by the following method:

[0014] Among them, n is the total number of users in the area, σ' user,i is the voltage drop loss of the electric meter of user i in the substation area;

[0015] in: Among them, k represents the kth time period among K time periods divided into 24 hours a day, U tq,k represents the mean three-phase voltage of the substation in the kth period, U user,k It represents the voltage indicated by the user's electric meter in the kth period, I user,k Represents the current of the user in the kth period.

[0016] Furthermore, the user's electric meter self-loss in the said area is user Determined by the following offenses:

[0017] Among them, n is the total number of user electricity meters in the substation, A represents the loss coefficient of the electricity meter itself, and K is the number of time periods in a day.

[0018] Furthermore, preprocessing the historical data of the substation area specifically includes:

[0019] Eliminate abnormal values ​​in the historical data of the substation, where the monitoring value of the target data is greater than the set upper threshold or less than the set lower threshold;

[0020] Query the historical data after removing abnormal values ​​to determine whether there are missing collection time points. If the collection time point i is missing, the average of the three collection times i-1, i-2 and i-3 is used as the value of the time point i.

[0021] Beneficial effects of the present invention: Through the present invention, the voltage drop loss in the substation area can be accurately determined, which can provide accurate data support for power dispatching on the one hand, and can provide accurate data support for power management in the substation area on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0023] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below:

[0025] The present invention provides a method for analyzing the theoretical loss of voltage drop in a transformer area, comprising the following steps:

[0026] S1. Obtain historical data of the target area, the historical data including the three-phase voltage value of the energy meter at the area point, the voltage of the users in the area, and the current of the area;

[0027] S2. Preprocess the historical data of the station area;

[0028] S3. Determine the voltage drop loss in the substation based on the pre-processed historical data of the substation. Through the above method, the voltage drop loss in the substation can be accurately determined. On the one hand, it can provide accurate data support for power dispatching, and on the other hand, it can provide accurate data support for power management in the substation.

[0029] Specifically, the voltage drop loss σ in the station area tatol Determined by:

[0030] σ tatol =σ tq +σ user ;

[0031] Where: tatol is the voltage drop loss in the station area, σ user It is the loss of the user's electric meter in the area.

[0032] The voltage drop loss in the station area is determined by the following method:

[0033] Among them, n is the total number of users in the area, σ' user,i is the voltage drop loss of the electric meter of user i in the substation area;

[0034] in: Among them, k represents the kth time period among K time periods divided into 24 hours a day, U tq,k represents the mean three-phase voltage of the substation in the kth period, U user,k It represents the voltage indicated by the user's electric meter in the kth period, I user,k Represents the current of the user in the kth period.

[0035] The user's electric meter self-loss σ in the station area user Determined by the following offenses:

[0036] Among them, n is the total number of user electricity meters in the substation, A represents the loss coefficient of the electricity meter itself, and K is the number of time periods in a day.

[0037] In this embodiment, preprocessing the historical data of the substation specifically includes:

[0038] Eliminate abnormal values ​​in the historical data of the substation, where the monitoring value of the target data is greater than the set upper threshold or less than the set lower threshold;

[0039] Query the historical data after removing the outliers to determine whether there are any missing collection time points. If the collection time point i is missing, the average of the three collection times i-1, i-2 and i-3 is used as the value of the time point i. Through the above, the accuracy of the final analysis result can be effectively ensured.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for analyzing the theoretical loss of voltage drop in a transformer area, characterized by: The following steps are involved: S1. Obtain historical data of the target area, the historical data including the three-phase voltage value of the energy meter at the area point, the voltage of the users in the area, and the current of the area; S2. Preprocess the historical data of the station area; S3. Determine the voltage drop loss within the substation based on the pre-processed historical data of the substation.

2. The method for analyzing the theoretical loss of voltage drop in a transformer area according to claim 1 is characterized in that: The voltage drop loss σ in the station area tatol Determined by: s tatol =s tq +s user ; Where: tatol is the voltage drop loss in the station area, σ user It is the loss of the user's electric meter in the substation area.

3. The method for analyzing the theoretical loss of voltage drop in a transformer substation according to claim 2 is characterized in that: The voltage drop loss in the station area is determined by the following method: Among them, n is the total number of users in the area, σ' user,i is the voltage drop loss of the electric meter of user i in the substation area; in: Among them, k represents the kth time period among K time periods divided into 24 hours a day, U tq,k represents the mean three-phase voltage of the substation in the kth period, U user,k It represents the voltage indicated by the user's electric meter in the kth period, I user,k Represents the current of the user in the kth period.

4. The method for analyzing the theoretical loss of voltage drop in a transformer area according to claim 2 is characterized in that: The user's electric meter self-loss σ in the station area user Determined by: Among them, n is the total number of user electricity meters in the substation, A represents the loss coefficient of the electricity meter itself, and K is the number of time periods in a day.

5. The method for analyzing the theoretical loss of voltage drop in a transformer area according to claim 1 is characterized in that: The preprocessing of historical data in the substation area specifically includes: Eliminate abnormal values ​​in the historical data of the substation, where the monitoring value of the target data is greater than the set upper threshold or less than the set lower threshold; Query the historical data after removing abnormal values ​​to determine whether there are missing collection time points. If the collection time point i is missing, the average of the three collection times i-1, i-2 and i-3 is used as the value of time point i.

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