Transmission line fault location method
A transmission line and fault location technology, applied in the field of power systems, can solve the problems of high device cost and installation cost, achieve accurate positioning, reduce installation cost, and reduce device cost
Active Publication Date: 2021-07-16
SHENZHEN POWER SUPPLY BUREAU
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] Based on this, it is necessary to provide a transmission line fault location for fault location at both ends of the existing transmission line, which needs to install a special traveling wave ranging device and GPS or Beidou time synchronization system for distance measurement, and the device cost and installation cost are high. method
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0058] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.
[0059] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" an...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present application provides a transmission line fault location method, including: obtaining the first-side three-phase voltage and the first-side three-phase current of the transmission line through the first protection device at the first end of the transmission line, and based on the first The side three-phase current determines the first zero-sequence current. The second side three-phase voltage and the second side three-phase current of the transmission line are obtained by the second protection device at the second end of the transmission line, and the second zero-sequence current is determined based on the second side three-phase current. Obtain the first-side three-phase voltage, first-side three-phase current, and first zero-sequence current through the second protection device, and determine the transmission line based on the second-side three-phase voltage, second-side three-phase current, and second zero-sequence current The first distance from the second end to the fault point. The first distance is compared with the total length of the transmission line, and if the first distance is smaller than the total length of the transmission line, then the first distance is determined as the first fault distance from the second end of the transmission line to the fault point.
Description
technical field [0001] The present application relates to the technical field of electric power systems, in particular to a method for fault distance measurement of transmission lines. Background technique [0002] With the continuous development of the power system, there are more and more ultra-high voltage and long-distance transmission lines. High-voltage transmission line is the lifeblood of the power system, and it is responsible for the transmission of electric energy. At the same time, it is the place where the most faults occur in the power system. The faults of high-voltage transmission lines pose a great threat to the safe operation of the entire power system. At present, most fault points of high-voltage transmission lines are detected by fault location devices. [0003] The fault location device, also known as the fault location device, is an automatic device for determining the location of the fault point. It can quickly and accurately determine the fault po...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/085G01R31/088
Inventor 巩俊强王其林张瑞郑润蓝张文徐沛郭阳毕星宇
Owner SHENZHEN POWER SUPPLY BUREAU