CN-121978455-A - Method for determining line loss line of distribution network low-voltage transformer area and related equipment

CN121978455ACN 121978455 ACN121978455 ACN 121978455ACN-121978455-A

Abstract

The application provides a method for determining a line loss line of a low-voltage transformer area of a distribution network and related equipment, and relates to the technical field of power monitoring. The determining method comprises the steps of obtaining a target sampling position corresponding to a target line in a low-voltage station area by adopting a binary search principle according to a low-voltage topological graph of the low-voltage station area, determining whether a line loss exists in a back-end line or not according to a target current value at the target sampling position and a current value sum of a user ammeter corresponding to the back-end line of the target sampling position based on kirchhoff current law, if yes, taking the back-end line as the target line, if not, taking a front-end line of the target sampling position as the target line, and jumping to obtain the target sampling position corresponding to the target line in the low-voltage station area by adopting the binary search principle according to the redetermined target line until the target line loss line is obtained. The application can greatly improve the checking efficiency of the line loss line of the low-voltage transformer area of the distribution network.

Inventors

YANG LIMEI
QIU KAIMIN

Assignees

广东电网有限责任公司梅州供电局

Dates

Publication Date: 20260505
Application Date: 20260116

Claims (11)

1. The method for determining the line loss line of the low-voltage transformer area of the distribution network is characterized by being applied to a cloud server and comprises the following steps: according to a low-voltage topological graph of a low-voltage station area, acquiring a target sampling position corresponding to a target line in the low-voltage station area by adopting a binary search principle; obtaining a target current value at the target sampling position and obtaining a current value sum of a user ammeter corresponding to a rear-section line of the target sampling position; based on kirchhoff's current law, determining whether a line loss exists in the back-end line according to the target current value and the sum of the current values; If yes, the rear section line is used as a target line, and if not, the front section line of the target sampling position is used as a target line; And according to the redetermined target line, jumping to the step of obtaining a target sampling position corresponding to the target line in the low-voltage station area by adopting a binary search principle according to the low-voltage topological graph of the low-voltage station area until a target line loss line is obtained, wherein the target line loss line is a line with line loss and the length of the line loss line meets the preset length.
2. The determining method according to claim 1, wherein the determining whether the succeeding line has a line loss based on kirchhoff's current law according to the target current value and the current value sum, comprises: Obtaining a difference value between the target current value and the sum of the current values; Based on kirchhoff's current law, if the difference value meets a preset difference value range, determining that no line loss exists in the back-end line, and if the difference value does not meet the preset difference value range, determining that the line loss exists in the back-end line.
3. The method according to claim 1, wherein the initial state of the target line is started from the transformer in the low-voltage transformer area, and the end of the target line is ended from the user meter, wherein the start of the target line is updated to the target sampling position when the line loss exists in the subsequent line, and the end of the target line is updated to the target sampling position when the line loss does not exist in the subsequent line.
4. A method of determining according to any one of claims 1 to 3, wherein the low voltage topology map includes at least location information of a transformer, different low voltage line information, and location information of a consumer electricity meter.
5. The current measuring device is characterized by comprising a measuring head device and a palm machine; The measuring head device comprises a first control unit, a current transformer measuring head and a first display, wherein the current transformer measuring head and the first display are respectively and electrically connected with the first control unit; the palm machine comprises a second control unit and a second display electrically connected with the second control unit, wherein the measuring head equipment is in communication connection with the palm machine; the measuring head device is used for measuring the current value of the low-voltage line through the current transformer measuring head under the condition that the low-voltage line of the low-voltage transformer area of the distribution network is not powered off, controlling the first display to display the current value through the first control unit, and sending the current value to the palm phone; The palm machine is configured to control, by using the second control unit, the second display to display the current value, and send, by using the second control unit, the current value to a cloud server, so that the cloud server determines, according to the method for determining a line loss line in a low-voltage transformer area of a distribution network according to any one of claims 1 to 4, a target line loss line in the low-voltage transformer area of the distribution network.
6. The current measurement device of claim 5, wherein the measurement head device further comprises a flexible current clamp mounting interface electrically connected to the first control unit for connecting a flexible current clamp through the flexible current clamp mounting interface to measure a current value of the low voltage line through the flexible current clamp if the line diameter of the low voltage line is greater than a preset line diameter threshold.
7. The current measuring apparatus according to claim 5 or 6, further comprising a mounting screw for connecting the measuring head apparatus and an insulating operation rod, and a switch button and a measurement mode switching button electrically connected to the first control unit, respectively, the switch button being for controlling the opening or closing of the measuring head apparatus, and the measurement mode switching button being for controlling a range of current measurement.
8. The utility model provides a join in marriage determining device of network low pressure district line loss circuit which characterized in that is applied to high in the clouds server, determining device includes: the first acquisition module is used for acquiring a target sampling position corresponding to a target line in a low-voltage station area by adopting a binary search principle according to a low-voltage topological graph of the low-voltage station area; The second acquisition module is used for acquiring a target current value at the target sampling position and acquiring a sum of current values of the user ammeter corresponding to a rear-section line of the target sampling position; the determining module is used for determining whether the rear-section line has line loss or not according to the target current value and the sum of the current values based on kirchhoff current law; And jumping to the step of obtaining the target sampling position corresponding to the target line in the low-voltage station area by adopting a binary search principle according to the redetermined target line, until obtaining a target line loss line which is a line loss and has a length meeting the preset length.
9. An electronic device comprising a processor and a memory communicatively coupled to the processor; the memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method for determining a line loss line of a low-voltage transformer area of a distribution network according to any one of claims 1 to 4.
10. A computer readable storage medium, wherein computer program instructions are stored in the computer readable storage medium, and when executed, implement the method for determining a line loss line of a low-voltage transformer area of a distribution network according to any one of claims 1 to 4.
11. A computer program product comprising a computer program, characterized in that the computer program, when executed, implements a method for determining a line loss line of a low voltage transformer area of a distribution network according to any of claims 1 to 4.

Description

Method for determining line loss line of distribution network low-voltage transformer area and related equipment Technical Field The application relates to the technical field of power monitoring, in particular to a method for determining a line loss line of a low-voltage transformer area of a distribution network and related equipment. Background The low-voltage distribution network area is used as a tail end link of power supply and is directly oriented to wide users, and the running condition of the low-voltage distribution network area is directly related to the stability and the economy of power supply of a power system. Currently, a target line loss line with line loss in a low-voltage transformer area line is usually determined by a manual checking mode, so that the efficiency is low. Disclosure of Invention The application provides a method and related equipment for determining a line loss line of a low-voltage transformer area of a distribution network, which are used for determining a target line loss line with line loss in the line of the low-voltage transformer area more efficiently and accurately. In a first aspect, the present application provides a method for determining a line loss line of a low-voltage transformer area of a distribution network, which is applied to a cloud server, where the method includes: according to a low-voltage topological graph of the low-voltage station area, acquiring a target sampling position corresponding to a target line in the low-voltage station area by adopting a binary search principle; obtaining a target current value at a target sampling position, and obtaining a current value sum of a user ammeter corresponding to a rear-section line of the target sampling position; Based on kirchhoff's current law, determining whether a line loss exists in a rear-section line according to the target current value and the sum of the current values; if yes, the back section line is used as a target line, and if not, the front section line at the target sampling position is used as the target line; And according to the redetermined target line, jumping to a step of obtaining a target sampling position corresponding to the target line in the low-voltage station area by adopting a binary search principle according to the low-voltage topological graph of the low-voltage station area until a target line loss line is obtained, wherein the target line loss line is a line with line loss and the length of the line loss line meets the preset length. Optionally, determining whether the line loss exists in the back-end line according to the target current value and the sum of the current values based on kirchhoff current law comprises obtaining a difference value between the target current value and the sum of the current values, determining that the line loss does not exist in the back-end line based on kirchhoff current law if the difference value meets a preset difference range, and determining that the line loss exists in the back-end line if the difference value does not meet the preset difference range. Optionally, the target line in the initial state uses a transformer in the low-voltage transformer area as a starting point and uses a user electricity meter at the tail end of the target line as an end point, the starting point of the target line is updated to be a target sampling position when the line loss exists in the rear-section line, and the end point of the target line is updated to be the target sampling position when the line loss does not exist in the rear-section line. Optionally, the low voltage topology map includes at least location information of the transformer, different low voltage line information, and location information of the consumer electricity meter. In a second aspect, the present application provides a current measurement apparatus comprising a measurement head apparatus and a palm machine; the measuring head device comprises a first control unit, a current transformer measuring head and a first display, wherein the current transformer measuring head and the first display are respectively and electrically connected with the first control unit; the palm machine comprises a second control unit and a second display electrically connected with the second control unit, wherein the measuring head device is in communication connection with the palm machine; The measuring head device is used for measuring the current value of the low-voltage line through the current transformer measuring head under the condition that the low-voltage line of the low-voltage transformer area of the distribution network is not powered off, controlling the first display to display the current value through the first control unit and sending the current value to the palm machine; The palm machine is used for controlling the second display to display the current value through the second control unit and sending the current value to the cloud server through the second control unit