Fault travelling wave network locating method based on travelling wave time difference
A fault traveling wave and network location technology, applied in the field of power system, can solve the problems of uneconomical, high price, and large redundancy of the location network, and achieve the effect of improving accuracy and saving costs.
Inactive Publication Date: 2010-11-17
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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If all substations in the whole network are equipped with traveling wave head detection devices, and the initial traveling wave arrival time of the entire power grid is used for fault location, then the redundancy of the entire positioning network will be the largest, and the fault tolerance performance of the network will be the highest. However, due to the current price of traveling wave head detection devices Expensive, and the scale of the modern power system is very large. This will increase the one-time investment of the system. It is not only uneconomical but also unnecessary to install traveling wave positioning devices in all substations.
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[0031] The invention proposes a fault traveling wave network positioning method based on traveling wave time difference from the perspective of the entire transmission network.
[0032] Firstly, according to the installation principle, a traveling wave head detection device is installed in some substations in the transmission network. see figure 1 , figure 1 In order to implement the simulated power grid model of the present invention, there are 11 substations in the entire transmission network. According to the installation principle of the present invention, the installation analysis of the traveling wave head detection device in the power grid is as follows:
[0033] (1) Substations (A) and (F) are terminal substations, and the number of adjacent substations is 1. According to the installation principle (1), it can be seen that substations (A) and (F) must be equipped with traveling wave head detection devices;
[0034] (2) Substations (B) and (E) are adjacent to a subs...
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The invention pertains to the field of a power system and relates to a fault traveling wave network positioning method which is based on the traveling wave time difference, the method of the invention is that: the partial substation of a power transmission network is equipped with a traveling-wave wave-head detection device for obtaining the traveling wave mutation signal, the accurate arrival time to each substation of the initial traveling wave and the state of a circuit breaker are recorded, the arrival time of the initial traveling wave and the state of the circuit breaker are transmittedto a positioning computer; the positioning computer determines a fault line, the judgment of the effective initial traveling wave arrival time is carried out for all the initial traveling wave arrival time, and then the fault is positioned by utilizing all the effective initial traveling wave arrival time. The method of the invention carries out reliable and accurate positioning of all the lines by installing the traveling-wave wave-head detection device at the partial substation of the whole power transmission network, thus improving the accuracy, the reliability and the economy of fault traveling wave positioning.
Description
technical field [0001] The invention belongs to the field of power systems and relates to a fault traveling wave network positioning method based on traveling wave time difference. Background technique [0002] Since the global positioning system GPS technology was fully civilianized in 1993, its high-precision clock function has made great progress in the fault traveling wave location technology, and it has gradually entered the practical stage. For a long time, scholars at home and abroad have studied many traveling wave positioning algorithms, and have also developed traveling wave positioning devices. However, single-ended or double-ended positioning is generally based on a single transmission line. When the positioning device fails or fails, the reliability cannot be obtained. Moreover, the error of the recording time of a single positioning device will also reduce the accuracy of positioning. The fault location based on a single line can no longer meet the requirements...
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IPC IPC(8): G01R31/08G01R31/28H02H7/26
CPCY04S10/522Y04S10/52
Inventor 李泽文曾祥君姚建刚马洪江王媛媛陈楠楚湘辉
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY