A method and device for monitoring the synchronous state of a line protection longitudinal channel
A synchronous state, line protection technology, applied in emergency protection circuit devices, circuit devices, components of emergency protection devices, etc., can solve the problems of inability to monitor, small load current of transmission lines, and no clear differential current threshold.
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[0068] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0069] Such as figure 1 As shown, the present invention provides a method for monitoring the synchronous state of a line protection longitudinal channel, comprising the following steps:
[0070] Step 100, data collection link: collect transmission line parameters and electrical quantities on both sides, and then execute step 200;
[0071] For the equivalent line with centralized parameters, the method of collecting transmission line parameters and electrical quantities on both sides is as follows: acquire transmission line parameters and electrical quantities on both sides, including: positive sequence impedance, positive sequence sensitive angle, positive sequence capacitive reactance, local parallel reactance The impedance of the reactor, the impedance of the parallel reactor on the opposite side, the voltage on bo...
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