Transformer area line loss simulation method

Abstract

The invention discloses a transformer area line loss simulation method. The method comprises the following steps: step 1, device installation: installing a line loss simulation system body around a transformer area; step 2, obtaining operation data: obtaining the operation data of the electric quantity related parameters of the transformer area at the installation position; 3, factors are determined, wherein the line loss simulation system body determines the main factors of the line loss of the bench line at the installation position; 4, factor conversion: carrying out standardized conversion on the transformer line characteristic factors, and converting the standardized transformer line characteristic factors into main components; 5, establishing a model: establishing a model which is the same as the model at the installation position by the line loss simulation system body; the electric quantity of the concentrator and the collector is adopted in real time, the real-time line loss is accurately calculated, the timeliness and the accuracy of line loss calculation are ensured, the manual and complicated transformer area line loss statistical analysis work is thoroughly liberated, and great convenience is provided for correct statistics and scientific analysis of transformer area line loss and targeted adoption of improvement measures.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer area line loss simulation, and in particular to a transformer area line loss simulation method. Background Art

[0002] Line loss in the substation is an important technical and economic indicator of power supply enterprises. The effect of line loss management directly affects the economic benefits of power supply enterprises. Disordered station-user relations, light load in the substation, abnormal power consumption of users, etc. can all cause abnormal line loss. At present, the provincial power companies of each network have put forward clear requirements for the line loss indicators of subordinate companies in various cities, and have included the control of line loss rate in the work assessment. At present, there are problems such as low power quality and excessive line loss caused by overload or heavy load, three-phase imbalance, small power factor and large reactive power, line harmonics, abnormal leakage current of users, etc. in the distribution and transformation substation. These problems affect the power supply quality and reliability of the distribution substation, so people generally use the substation line loss simulation method to simulate the problems existing in the substation.

[0003] However, the traditional line loss simulation method has the following disadvantages:

[0004] The traditional line loss simulation method can only simulate the damage of simple lines. When encountering complex line conditions, manual damage inspection is still required, which reduces the efficiency of line repair. Summary of the invention

[0005] The purpose of the present invention is to provide a method for simulating line loss in a substation area, so as to solve the problem that the traditional method for simulating line loss in a substation area proposed in the above background technology can only simulate damage to simple substation lines, and manual damage inspection is still required when encountering complex substation line conditions, which reduces the efficiency of substation line repair.

[0006] To achieve the above object, the present invention provides the following technical solution: a method for simulating line loss in a transformer area, comprising the following steps:

[0007] Step 1: Device installation: Install the line loss simulation system body around the transformer area;

[0008] Step 2: Obtain operating data: Obtain operating data of power-related parameters of the installation area;

[0009] Step 3: Determine the factors: The line loss simulation system determines the main factors of the line loss at the installation location;

[0010] Step 4: Factor conversion: standardize the platform line characteristic factors and convert the standardized platform line characteristic factors into principal components;

[0011] Step 5: Establish the model: The line loss simulation system establishes the same model as the installation location;

[0012] Step 6: Model drill: The model conducts loss drills on the station line where it is located;

[0013] Step 7. Solution provision: Provide maintenance tool solutions based on the drill results.

[0014] As a preferred technical solution of the present invention, in the step 1, the line loss simulation system body establishes a two-way communication connection with the line loss abnormality simulation platform, in the step 1, the line loss simulation system body establishes a two-way communication connection with the intelligent substation platform, in the step 1, the line loss simulation system body establishes a two-way communication connection with the anti-electricity theft simulation platform, and the line loss abnormality simulation platform simulates various factors causing line loss, such as public transformer or terminal failure, public transformer secondary side wiring error, user wiring error, through the acquisition and operation and maintenance simulation training system, to form simulation data and faults consistent with the actual line loss, and present complete line loss data. The anti-electricity theft simulation platform acquires the operation and maintenance simulation training system to form a simulation environment based on a large number of typical electricity theft cases and targets different metering simulations, The location where the electricity theft is committed is determined by designing simulations of typical electricity theft methods, and electricity theft operation points are set in multiple links of the simulation equipment, including controlling the switching of the power supply circuit to achieve over-meter electricity theft, controlling the voltage and current phase sequence memory to achieve changing the metering circuit to steal electricity, and controlling the current and voltage sampling circuit to achieve changing the internal circuit of the electricity meter to steal electricity. The intelligent substation platform collection and operation and maintenance simulation training system will set simulation terminal current and voltage harmonic data, daily and monthly imbalance data of voltage and current, maximum value of current and voltage imbalance and occurrence time, leakage current size data, and cooperate with equipment failure simulation to form a simulation environment with abnormal power quality. The power consumption, power quality, and reactive power information of the equipment are monitored through the simulation master station to enhance the all-round monitoring and data analysis capabilities of personnel.

[0015] As a preferred technical solution of the present invention, the line loss abnormality simulation platform includes a substation line classification module, a line loss classification module and a line loss calculation module. The substation line classification module divides the substation line into technical line loss and management line loss according to the loss shape; constant line loss, variable line loss and unknown line loss; statistical line loss, theoretical line loss and actual line loss. The line loss classification module is divided into high loss, negative loss and uncalculated line loss according to the degree of loss. The high-loss substation refers to an abnormal substation with a line loss rate of more than 9% in the substation during a certain statistical period. The negative-loss substation refers to an abnormal substation with a line loss rate of less than -1% in the substation during a certain statistical period. The area with uncalculated loss refers to the area where the power consumption is empty due to metering failure and abnormal collection, resulting in the inability to accurately calculate the area line loss rate according to the model. The line loss calculation module calculates the area line loss rate, the area power supply and the area power consumption respectively. The area line loss rate: area line loss rate = (area line loss power / area power supply) * 100%; the area power supply: area power supply = area assessment table positive power + photovoltaic users' online power; area power consumption: area power consumption = assessment table reverse power + ordinary users' power + photovoltaic users' power + others (power for users without meters, power for business changes, and power for refunds).

[0016] As a preferred technical solution of the present invention, the anti-electricity theft simulation platform includes an environmental simulation module, a metering simulation module and a real-time positioning module. The real-time positioning module locates the position of the electricity theft line in real time. The environmental simulation module forms a simulation environment based on a large number of typical electricity theft cases. The metering simulation module measures the amount of electricity lost by the line under the electricity theft environment.

[0017] As a preferred technical solution of the present invention, the intelligent substation platform includes a terminal simulation module, a branch-end simulation module, a real-time monitoring module and a data transmission module. The data transmission module transmits the monitored data to the back end in real time by sharing it with the line loss management module in the SG186 marketing system. The real-time monitoring module takes the power of the concentrator and the collector in real time. The terminal simulation module and the branch-end simulation module are set to simulate terminal current and voltage harmonic data, daily and monthly imbalance data of voltage and current, maximum value of current and voltage imbalance exceeding the limit and occurrence time, and leakage current size data.

[0018] As a preferred technical solution of the present invention, the specific content of model establishment in step five is to use the operating data as the training set of the training model, use the extracted principal components as the input features of the input layer of the training model, and use the predicted value of the substation line loss as the output result of the training model to train the training model to obtain the final model.

[0019] As a preferred technical solution of the present invention, the solution in step seven specifically consists of two parts: an intelligent test tool for electricity consumption information collection and a substation identification instrument. Through the intelligent test tool for electricity consumption information collection, various fault phenomena occurring in the collection equipment can be accurately verified and checked, and the substation identification instrument can be used to determine the substation relationship to which the collection terminal belongs.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The power of the concentrator and collector is collected in real time, and the real-time line loss is accurately calculated, which ensures the timeliness and accuracy of the line loss calculation, completely liberates the manual and complicated statistical analysis of the line loss in the substation area, and provides great convenience for the correct statistics, scientific analysis and targeted rectification measures of the line loss in the substation area;

[0022] 2. The line loss simulation system integrates three major trends into one, and the collection and operation and maintenance simulation training system will bring the latest training experience to each grassroots unit. Through continuous training, the professional knowledge and technical capabilities of grassroots personnel will reach a higher level, thereby establishing a more professional and up-to-date line loss maintenance team in the substation area. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a flow chart of the present invention;

[0024] Figure 2 It is a schematic diagram of the architecture of the line loss simulation system of the present invention;

[0025] Figure 3 It is a schematic diagram of the architecture of the line loss abnormality simulation platform of the present invention;

[0026] Figure 4 It is a schematic diagram of the architecture of the anti-electricity theft simulation platform of the present invention;

[0027] Figure 5 It is a schematic diagram of the architecture of the intelligent station area platform of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-5 The present invention provides a method for simulating line loss in a transformer area, comprising the following steps:

[0030] Step 1: Device installation: Install the line loss simulation system body around the transformer area;

[0031] Step 2: Obtain operating data: Obtain operating data of power-related parameters of the installation area;

[0032] Step 3: Determine the factors: The line loss simulation system determines the main factors of the line loss at the installation location;

[0033] Step 4: Factor conversion: standardize the platform line characteristic factors and convert the standardized platform line characteristic factors into principal components;

[0034] Step 5: Establish the model: The line loss simulation system establishes the same model as the installation location;

[0035] Step 6: Model drill: The model conducts loss drills on the station line where it is located;

[0036] Step 7. Solution provision: Provide maintenance tool solutions based on the drill results.

[0037] In step one, the line loss simulation system establishes a two-way communication connection with the line loss abnormality simulation platform. In step one, the line loss simulation system establishes a two-way communication connection with the intelligent substation platform. In step one, the line loss simulation system establishes a two-way communication connection with the anti-electricity theft simulation platform. The line loss abnormality simulation platform simulates various factors that cause line loss, such as public transformer or terminal failure, public transformer secondary side wiring error, user wiring error, through the acquisition and operation and maintenance simulation training system, to form simulation data and faults that are consistent with the actual line loss, and present a complete line loss data distribution. The anti-electricity theft simulation platform acquires and operates the simulation training system, which will form a simulation environment based on a large number of typical electricity theft cases and implement different metering simulations and electricity theft behavior locations. Design a simulation of typical electricity theft methods, and set electricity theft operation points in multiple links of the simulation equipment, including controlling the switching of the power supply circuit to achieve over-meter electricity theft, controlling the voltage and current phase sequence memory to achieve changing the metering circuit to steal electricity, and controlling the current and voltage sampling circuit to achieve changing the internal circuit of the electricity meter to steal electricity. The intelligent substation platform collection and operation and maintenance simulation training system will set the simulation terminal current and voltage harmonic data, daily and monthly imbalance data of voltage and current, maximum value of current and voltage imbalance and occurrence time, leakage current size data, and cooperate with equipment failure simulation to form a simulation environment with abnormal power quality. The power consumption, power quality, and reactive power information of the equipment are monitored through the simulation master station to enhance the all-round monitoring and data analysis capabilities of personnel.

[0038] The line loss anomaly simulation platform includes the substation line classification module, the line loss classification module and the line loss calculation module. The substation line classification module divides the substation line into technical line loss and management line loss according to the loss shape; constant line loss, variable line loss and unknown line loss; statistical line loss, theoretical line loss and actual line loss. The line loss classification module is divided into high loss, negative loss and uncalculated line loss according to the degree of loss. High-loss substation refers to an abnormal substation with a line loss rate of more than 9% in the same period of a statistical period. Negative loss substation refers to an abnormal substation with a line loss rate of less than -1% in the same period of a statistical period. Uncalculated line loss substation refers to substation Due to metering failure and abnormal collection, the power consumption is empty, resulting in the inability to accurately calculate the line loss rate of the substation according to the model. The line loss calculation module calculates the line loss rate, power supply and power consumption of the substation respectively. The line loss rate of the substation: the line loss rate of the substation = (line loss power of the substation / power supply of the substation) * 100%; the power supply of the substation: the power supply of the substation = the positive power in the substation assessment table + the online power of photovoltaic users; the power consumption of the substation: the power consumption of the substation = the reverse power in the assessment table + the power consumption of ordinary users + the power consumption of photovoltaic users + others (the power consumption of users without meters, the power consumption of business changes, and the power consumption refunded).

[0039] The anti-electricity theft simulation platform includes an environmental simulation module, a metering simulation module and a real-time positioning module. The real-time positioning module locates the location of the electricity theft line in real time. The environmental simulation module forms a simulation environment based on a large number of typical electricity theft cases. The metering simulation module measures the amount of electricity lost in the line under the electricity theft environment.

[0040] The intelligent substation platform includes a terminal simulation module, a branch-end simulation module, a real-time monitoring module and a data transmission module. The data transmission module transmits the monitored data to the back end in real time by sharing it with the line loss management module in the SG186 marketing system. The real-time monitoring module collects the power from the concentrator and collector in real time. The terminal simulation module and the branch-end simulation module are set to simulate the terminal current and voltage harmonic data, the daily and monthly imbalance data of voltage and current, the maximum value of the current and voltage imbalance and the time of occurrence, and the leakage current size data.

[0041] The specific content of model establishment in step five is to use the operating data as the training set of the training model, use the extracted principal components as the input features of the input layer of the training model, and use the predicted value of the substation line loss as the output result of the training model to train the training model and obtain the final model.

[0042] The solution in step seven specifically consists of two parts: an intelligent test tool for electricity consumption information collection and a substation identification instrument. The intelligent test tool for electricity consumption information collection can accurately verify and troubleshoot various fault phenomena in the collection equipment, and the substation identification instrument can be used to determine the substation relationship to which the collection terminal belongs.

[0043] In the present invention, through the acquisition and operation and maintenance simulation training system, various factors causing line loss are simulated, such as public transformer or terminal failure, public transformer secondary side wiring error, user wiring error, to form simulation data and faults that match the actual line loss, present a complete line loss data distribution, train grassroots personnel on how to analyze the correspondence between faults and data and the correspondence between line loss indicators and each user's data, thereby improving the line loss management level and reducing the line loss rate. The acquisition and operation and maintenance simulation training system will form a simulation environment based on a large number of typical electricity theft cases and design simulations of typical electricity theft methods for different metering simulations and electricity theft behavior implementation locations; in the simulation Electricity theft operation points are set in multiple links of the real equipment, including controlling the switching of the power supply circuit to achieve over-meter electricity theft, controlling the voltage and current phase sequence memory to achieve changing the metering circuit to steal electricity, and controlling the current and voltage sampling circuit to achieve changing the internal circuit of the electric energy meter to steal electricity. The collection and operation and maintenance simulation training system will set the simulation terminal current and voltage harmonic data, daily and monthly imbalance data of voltage and current, maximum value of current and voltage imbalance and occurrence time, leakage current size, and cooperate with equipment failure simulation to form a simulation environment with abnormal power quality; through the simulation master station, the power consumption, power quality, and reactive power of the equipment are monitored to improve the all-round monitoring and data analysis capabilities of personnel.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for simulating line loss in a transformer area, characterized in that: The following steps are involved: Step 1: Device installation: Install the line loss simulation system body around the transformer area; Step 2: Obtain operating data: Obtain operating data of power-related parameters of the installation area; Step 3: Determine the factors: The line loss simulation system determines the main factors of the line loss at the installation location; Step 4: Factor conversion: standardize the platform line characteristic factors and convert the standardized platform line characteristic factors into principal components; Step 5: Establish the model: The line loss simulation system establishes the same model as the installation location; Step 6: Model drill: The model conducts loss drills on the station line where it is located; Step 7. Solution provision: Provide maintenance tool solutions based on the drill results.

2. The method for simulating line loss in a transformer area according to claim 1, characterized in that: In the step 1, the line loss simulation system body establishes a two-way communication connection with the line loss abnormality simulation platform, the line loss simulation system body establishes a two-way communication connection with the intelligent substation platform, and the line loss simulation system body establishes a two-way communication connection with the anti-electricity theft simulation platform. The line loss abnormality simulation platform simulates various factors that cause line loss, such as public transformer or terminal failure, public transformer secondary side wiring error, user wiring error, through the acquisition and operation and maintenance simulation training system, to form simulation data and faults that match the actual line loss, and present a complete line loss data distribution. The anti-electricity theft simulation platform acquires the operation and maintenance simulation training system to form a simulation environment based on a large number of typical electricity theft cases and implements different metering simulations and electricity theft behaviors. The simulation of typical electricity theft methods is designed respectively, and electricity theft operation points are set in multiple links of the simulation equipment, including controlling the switching of the power supply circuit to realize over-meter electricity theft, controlling the voltage and current phase sequence memory to realize changing the metering circuit to steal electricity, and controlling the current and voltage sampling circuit to realize changing the internal circuit of the electric energy meter to steal electricity. The intelligent substation platform collection and operation and maintenance simulation training system will set the simulation terminal current and voltage harmonic data, the daily and monthly imbalance data of voltage and current, the maximum value of current and voltage imbalance and the time of occurrence, and the leakage current size data, and cooperate with the equipment failure simulation to form a simulation environment with abnormal power quality. The power consumption, power quality, and reactive power information of the equipment are monitored through the simulation master station to enhance the all-round monitoring and data analysis capabilities of the personnel.

3. The method for simulating line loss in a transformer area according to claim 2, characterized in that: The line loss abnormality simulation platform includes a substation line classification module, a line loss classification module and a line loss calculation module. The substation line classification module divides the substation line into technical line loss and management line loss according to the loss shape; constant line loss, variable line loss and unknown line loss; statistical line loss, theoretical line loss and actual line loss. The line loss classification module divides the line loss into high loss, negative loss and uncalculated line loss according to the loss degree. The high-loss substation refers to an abnormal substation with a line loss rate of more than 9% in the same period of a statistical period. The negative-loss substation refers to an abnormal substation with a line loss rate of less than -1% in the same period of a statistical period. The line loss cannot be calculated in the substation refers to the substation caused by metering failure and collection abnormality, and the power consumption is empty, which makes it impossible to accurately calculate the substation line loss rate according to the model. The line loss calculation module calculates the substation line loss rate, substation power supply and substation power consumption respectively. The substation line loss rate: substation line loss rate = (substation line loss power / substation power supply) * 100%; the substation power supply: substation power supply = substation assessment table positive power + photovoltaic user online power; substation power consumption: substation power consumption = assessment table reverse power + ordinary user power consumption + photovoltaic user power consumption + others.

4. The method for simulating line loss in a transformer area according to claim 2, characterized in that: The anti-electricity theft simulation platform includes an environment simulation module, a metering simulation module and a real-time positioning module. The real-time positioning module locates the position of the electricity theft line in real time. The environment simulation module forms a simulation environment based on a large number of typical electricity theft cases. The metering simulation module measures the power loss of the line under the electricity theft environment.

5. The method for simulating line loss in a transformer area according to claim 2, characterized in that: The intelligent substation platform includes a terminal simulation module, a branch-end simulation module, a real-time monitoring module and a data transmission module. The data transmission module transmits the monitored data to the back end in real time by sharing it with the line loss management module in the SG186 marketing system. The real-time monitoring module takes the power of the concentrator and collector in real time. The terminal simulation module and the branch-end simulation module are set to simulate the terminal current and voltage harmonic data, the daily and monthly imbalance data of voltage and current, the maximum value of the current and voltage imbalance and the time of occurrence, and the leakage current size data.

6. The method for simulating line loss in a transformer area according to claim 1, characterized in that: The specific content of model establishment in step five is to use the operating data as the training set of the training model, use the extracted principal components as the input features of the input layer of the training model, and use the predicted value of the line loss in the substation area as the output result of the training model to train the training model to obtain the final model.

7. The method for simulating line loss in a transformer area according to claim 1, characterized in that: The solution in step seven specifically consists of two parts: an intelligent test tool for electricity consumption information collection and a substation identification instrument. The intelligent test tool for electricity consumption information collection can accurately verify and troubleshoot various fault phenomena in the collection equipment, and the substation identification instrument can be used to determine the substation relationship to which the collection terminal belongs.

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