Intelligent state monitoring method of medium-pressure switch apparatus
A switchgear and medium-voltage technology, which is applied in the direction of electric power measurement, measuring electricity, and measuring devices through current/voltage, can solve the problem of inability to realize microcomputer measurement, on-line monitoring of host communication operation status of microcomputer protection and monitoring systems, and medium-voltage power grids. Safe and reliable operation barriers, lack of intelligent monitoring functions and other issues, to achieve stable and reliable work performance, simple switchgear status monitoring, and low operating costs
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[0042] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.
[0043] see figure 1 As shown, the intelligent state monitoring method for medium voltage switchgear includes the following steps:
[0044] (1) Collect the voltage and current signals of the medium voltage grid, specifically:
[0045] AC sampling of two line voltages and two phase currents using current transformers and voltage transformers in the medium voltage grid;
[0046] (2) The collected voltage and current signals are subjected to isolation transformation processing, specifically:
[0047] Use integrated operational amplifiers to perform isolation and transformation processing of voltage and current signals;
[0048] (3) Perform AC sampling on the voltage and current signals after isolation and transformation, the corresponding sampling points are 12, 16, 20 or 24, and the sampling interval is between 0.8 and 1.8 milliseconds;
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