Local line loss numerical calculation method based on concentrator
By installing a high-performance concentrator in the low-voltage table area, collecting the power meter data and calculating the line loss value, the accuracy of line loss calculation in the existing technology is solved, and accurate line loss management and economic benefits are achieved.
Patent Information
- Application Number
- CN202410085075.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-20
- Publication Date
- 2025-07-29
AI Technical Summary
The existing technology is difficult to achieve accurate linear loss calculations for different power station areas, and cannot meet the management needs of "one station area, one indicator", resulting in a lack of accurate data support for linear loss management.
By installing a high-performance concentrator in the low-voltage table area, collecting power meter data and combining the main station parameters, the concentrator's built-in algorithm calculates line loss theory and actual values to provide accurate line loss data.
The precise calculation of line loss theory and actual values in different station areas is achieved, providing accurate data support for the line loss management work of power companies and improving economic benefits.
Smart Images
Figure CN120386952A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of line loss numerical calculation, and in particular to a method for calculating local line loss numerical values based on a concentrator. Background Art
[0002] In the management of power distribution areas, line loss numerical values are a comprehensive reflection of the economic operation management level of the power grid and the economic benefits of power supply enterprises, and have always been the focus of work of the State Grid. With the improvement of line loss management level in recent years, the requirement for the degree of refinement of line loss management is getting higher and higher. The original evaluation method of "one-size-fits-all" for line loss numerical values has been changed to the construction of a new management model of "one index for one area" to scientifically guide loss reduction. Accurate theoretical line loss calculation provides an important basis for the "one index for one area" management model and formulating loss reduction measures. With the development of the power system, the structure of the distribution network is becoming increasingly complex, and the amount of power grid data is getting larger and larger. A more accurate line loss calculation method is of great significance. Summary of the Invention
[0003] In view of the deficiencies and defects existing in the prior art, the present invention provides a method for calculating local line loss numerical values based on a concentrator. By using a high-performance concentrator installed in a low-voltage power distribution area and combining relevant calculation parameters issued by the master station, the operation data of all electric meters in the power distribution area are collected. The concentrator uses the built-in algorithm to calculate the theoretical and actual numerical values of the line loss in this power distribution area, so as to better guide the work of line loss management. This method can accurately calculate the theoretical and actual numerical values of line loss in different power distribution areas through the concentrator algorithm, provide more accurate data for the "one index for one area", facilitate the work of power companies, better manage line loss, and improve economic benefits.
[0004] The object of the present invention can be achieved through the following technical solutions:
[0005] A method for calculating local line loss numerical values based on a concentrator includes the following steps:
[0006] Step 1: The master station sends relevant parameters to the concentrator;
[0007] Step 2: The concentrator collects relevant data of the total meter and household meters in the power distribution area;
[0008] Step 3: The concentrator determines whether the calculation conditions are met;
[0009] Step 4: The concentrator calculates the theoretical and actual numerical values of the line loss in this power distribution area;
[0010] Step 5: The concentrator reports the final result to the master station;
[0011] Further, in step 1, the master station sends the effective number of points N for calculating the line loss in this power distribution area and the maximum deviation percentage α that can be calculated for the effective number of points to the concentrator.
[0012] Further, in step 2, the concentrator collects the daily power supply, voltage curve, current curve, power curve, and phase information of the total meter and household meters in the substation area every day. The number of curves is collected according to the effective number of points N, and the success rate is calculated.
[0013] Further, in step 3, the concentrator determines whether the daily power supply and the success rate of curve collection meet the requirements for line loss calculation. Among them, the success rate requirement for daily power supply collection reaches 100%, the success rate requirement for phase collection reaches 100%, and the success rate requirement for curve data collection is not less than 1-α.
[0014] 1) If the requirements are not met, an abnormal message is reported to the master station.
[0015] 2) If all requirements are met, step 4 is performed.
[0016] Further, in step 4, the concentrator calculates the theoretical value of the substation area line loss using the voltage drop method and calculates it using the following formula.
[0017] 1) Where ΔP a,t is the power loss of all phase A users in the substation area at the t-th moment, M is the number of phase A users, and the calculation of the loss power of phases B and C is the same as that of phase A.
[0018] 2) Where ΔQ a is the line loss power of all phase A users in the substation area throughout the day, N is the number of effective points, and the calculation of the loss power of phases B and C is the same as that of phase A.
[0019] 3) Where M is the fixed loss of the electric energy meter, n1 is the number of single-phase electric energy meters, n2 is the number of three-phase electric energy meters, and it is default that the single-phase meter loses 1 kWh per month and the three-phase meter loses 2.4 kWh per month.
[0020] 4) Where ΔL% is the theoretical value of the substation area line loss, and Q is the daily power supply of the total meter in the substation area.
[0021] The actual value of the substation area line loss is calculated using (1 - the daily power supply of all household meters / the daily power supply of the total meter) × 100%.
[0022] Further, in step 5, the concentrator reports the finally calculated actual value of the line loss and the theoretical value of the line loss to the master station.
[0023] Beneficial technical effects of the present invention: By combining a high-performance concentrator installed in a low-voltage power distribution area with relevant calculation parameters issued by the master station, the operation data of all electric meters in the power distribution area is collected. The concentrator uses built-in algorithms to calculate the theoretical and actual values of the line loss in this power distribution area. This method relies on the collection and calculation capabilities of the high-performance concentrator to calculate the theoretical and actual values of the line loss in different power distribution areas, providing more accurate values for the line loss management work of the power company, better carrying out the line loss management work, and improving economic benefits. Brief Description of the Drawings
[0024] Figure 1 is the flow chart of the present invention. Detailed Embodiment
[0025] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the present invention.
[0026] As Figure 1 shown, a method for calculating local line loss value based on a concentrator includes the following steps:
[0027] Step 1: The master station issues the effective number of points N for line loss calculation in this power distribution area and the maximum deviation percentage α that can be calculated for the effective number of points to the concentrator;
[0028] Step 2: The concentrator collects the daily power supply, voltage curve, current curve, power curve, and phase information of the total meter and household meters in the power distribution area every day. The number of curves is collected according to the effective number of points N, and the success rate is calculated;
[0029] Step 3: The concentrator determines whether the daily power supply and the success rate of curve collection meet the requirements for line loss calculation. Among them, the success rate requirement for daily power supply collection is 100%, the success rate requirement for phase collection is 100%, and the success rate requirement for curve data collection is not less than 1-α.
[0030] 1) If the requirements are not met, an abnormal message is reported to the master station;
[0031] 2) If all requirements are met, proceed to Step 4;
[0032] Step 4: The concentrator calculates the theoretical value of the line loss in the power distribution area using the voltage drop method and calculates using the following formula:
[0033] 1) where ΔP a,t is the power loss of all A-phase users in the power distribution area at the t-th moment, M is the number of A-phase users, and the calculation of the power loss of B and C phases is the same as that of the A phase;
[0034] 2) where ΔQa $L_A$ is the line loss power of all phase-A users in the substation area throughout the day, $N$ is the number of valid points, and the calculation of the line loss power of phases B and C is the same as that of phase A;
[0035] 3) Among them, $M$ is the fixed loss of the electric energy meter, $n_1$ is the number of single-phase electric energy meters, $n_2$ is the number of three-phase electric energy meters. By default, the loss of a single-phase meter is 1 kWh per month, and the loss of a three-phase meter is 2.4 kWh per month;
[0036] 4) Among them, $\Delta L\%$ is the theoretical value of the line loss in the substation area, and $Q$ is the daily power supply of the main meter in the substation area.
[0037] The actual value of the line loss in the substation area is calculated by $(1 - \frac{\text{total daily power supply of all household meters}}{\text{daily power supply of the main meter}})×100\%$.
[0038] Step 5: The concentrator reports the finally calculated actual line loss value and the theoretical line loss value to the master station.
[0039] The above embodiments are illustrative of the specific implementation manners of the present invention, rather than limitations on the present invention. Those skilled in the relevant technical fields can make various transformations and changes without departing from the spirit and scope of the present invention to obtain corresponding equivalent technical solutions. Therefore, all equivalent technical solutions should be included in the patent protection scope of the present invention.
Claims
1. A method for calculating the local line loss value based on a concentrator, characterized in that, It includes the following steps: Step 1: The master station sends relevant parameters to the concentrator; Step 2: The concentrator collects relevant data of the total meter and household meters in the substation area; Step 3: The concentrator determines whether the calculation conditions are met; Step 4: The concentrator calculates the theoretical value and actual value of the line loss in this substation area; Step 5: The concentrator reports the final result to the master station.
2. The local line loss value calculation method based on a concentrator according to claim 1, wherein, In Step 1, the master station sends the effective number of points N for line loss calculation in this substation area and the maximum deviation percentage α that can be calculated for the effective number of points to the concentrator.
3. A method for calculating the local line loss value based on a concentrator according to claim 1, characterized in that, In Step 2, the concentrator collects the daily power supply, voltage curve, current curve, power curve, and phase information of the total meter and household meters in the substation area every day. The number of curves is collected according to the effective number of points N, and the success rate is calculated.
4. A method for calculating the local line loss value based on a concentrator according to claim 1, wherein In Step 3, the concentrator determines whether the daily power supply and the success rate of curve collection meet the requirements for line loss calculation. Among them, the success rate requirement for daily power supply collection is 100%, the success rate requirement for phase collection is 100%, and the success rate requirement for curve data collection is not less than 1 - α. 1) If the requirements are not met, an abnormal message is reported to the master station; 2) If all requirements are met, proceed to Step 4.
5. A method for calculating the local line loss value based on a concentrator according to claim 1, characterized in that, In Step 4, the concentrator calculates the theoretical value of the line loss in the substation area using the voltage drop method and calculates it using the following formula. 1) where ΔP a,t is the power loss of all phase-A users in the substation area at the t-th moment, M is the number of phase-A users, and the power losses of phases B and C are calculated in the same way as phase A; 2) where ΔQ a is the line loss power of all phase A users in the substation area throughout the day, N is the number of effective points, and the calculation of the loss power of phases B and C is the same as that of phase A; 3) Where M is the fixed loss of the electricity meter, n1 is the number of single-phase electricity meters, n2 is the number of three-phase electricity meters. By default, the loss of a single-phase meter is 1 kWh per month, and the loss of a three-phase meter is 2.4 kWh per month; 4) where ΔL% is the theoretical value of the line loss in the substation area, and Q is the daily power supply of the total meter in the substation area; The actual value of the line loss in the substation area is calculated using (1 - total daily power supply of all household meters / total daily power supply of the main meter) × 100%.
6. The local line loss numerical calculation method based on a concentrator according to claim 1, wherein, In Step 5, the concentrator reports the actual value of the line loss and the theoretical value of the line loss calculated finally to the master station.