Network on-line live line measurement method for line parameter of power system

A technology of line parameters and measurement methods, applied in fault locations and other directions, can solve problems such as huge measurement workload, and achieve the effects of saving measurement costs, reducing measurement workload, and reducing power outages.

Active Publication Date: 2011-05-04
SHENZHEN SHUANGHE ELECTRIC CO LTD +1
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Problems solved by technology

At present, there are more and more mutual inductance lines in the power grid. If the zero-sequence self-inductance of a new line is to be measured, due to its coupling with other operating mutual inductance lines, it is necessary to measure all coupled lines at the same time, resulting in a very heavy measurement workload. huge

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  • Network on-line live line measurement method for line parameter of power system
  • Network on-line live line measurement method for line parameter of power system

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Embodiment Construction

[0043] The present invention will be described below in combination with specific embodiments and with reference to the accompanying drawings.

[0044] The invention relates to an on-line online live measurement method for line parameters of a power system, which is measured online and in real time by a line parameter measurement system in a measurement center.

[0045] The line parameter measuring system as shown in the accompanying drawing includes a communication server and a background machine.

[0046]The communication server is networked with the running acquisition equipment of each substation through high-speed Ethernet. The acquisition equipment of the substation, such as fault recorder, PMU, etc., requires each acquisition equipment to have the same clock system; the background machine obtains the sampling data through the communication server, and Determine the measurement conditions for the data at both ends of the line, and analyze the line parameters for the data...

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Abstract

The invention relates to a network on-line live line measurement method for the line parameter of a power system. A measuring center performs network on-line live line real-time measurement according to sets of computer networked data and networked instructions organized by a line parameter measuring system on the basis of a specific sequence. The method sequentially comprises the following stepsof: 1) accessing a global positioning system (GPS) signal to a data acquisition device in each transformer substation and correctly running; 2) requesting to establish transmission control protocol (TCP) connection, sending a device configuration information reading command and a real-time data command to the data acquisition device, receiving real-time data and establishing a real-time running chart; 3) actively retrieving the data acquisition device in each transformer station, monitoring the running condition of each line in real time and automatically measuring the line parameter; and 4) storing a line parameter measured value in a database. The data acquisition device which is put into operation and networked on site is utilized, and a new device is not required to be arranged, so that measurement workload can be obviously reduced, measurement cost is saved, power failure frequency is low, and power failure time is short; and the method is easy to operate, and safe and reliable.

Description

technical field [0001] The invention relates to monitoring and recording, in particular to an on-line electrification measurement method for line parameter network of a power system. Background technique [0002] The accuracy of line parameters is directly related to the accuracy of protection action and fault location. "National Standards of the People's Republic of China—Technical Regulations for Relay Protection and Safety Automatic Devices" stipulates that the zero sequence parameters of the line must adopt the measured values. The existing measurement method is to build a measurement platform to measure the current, voltage and other information of the line when the line to be tested is completely out of power and off the grid, and then obtain the actual transmission line parameters. At present, there are more and more mutual inductance lines in the power grid. If the zero-sequence self-inductance of a new line is to be measured, due to its coupling with other operatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
Inventor 赵忠任家友袁明军覃松涛郑发林韦恒颜顺衡韩冰巫聪云孙翔秦蓓宁文辉黄东山高立克
Owner SHENZHEN SHUANGHE ELECTRIC CO LTD
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