Coal mine system power source switching method and device
A system power supply and switching device technology, applied in the direction of circuit devices, emergency power supply arrangements, electrical components, etc., can solve the problems of equipment withdrawal from load, power supply switching is not fast, etc., to improve accuracy and shorten the time for fault judgment.
Inactive Publication Date: 2014-04-30
CHNA ENERGY INVESTMENT CORP LTD +1
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Problems solved by technology
[0007] Based on this, it is necessary to provide a coal mine system power switching method and device for the technical problem that the power supply switching of the existing coal mine system is not fast, causing the equipment to withdraw from the load
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[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0022] like figure 1 Shown is a working flow chart of a power switching method for a coal mine system according to the present invention. The coal mine system includes at least one device, a busbar connected to the device, a first incoming line connected to the first power supply, and a busbar connected to the second power supply. The second incoming line, and the busbar is closed with the circuit breaker of the first incoming line, and the circuit breaker of the busbar and the second incoming line is tripped, including:
[0023] Step 11, monitoring at least two power parameters of the first incoming line;
[0024] Step 12, if at least two of the power parameters fall into the fault range corresponding to the power parameters, it is judged as a power failure, and step 13 is performed, otherwise, step 11 is performed;
[0025] Step 1...
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The invention discloses a coal mine system power source switching method and device. A coal mine system comprises at least one device, a bus connected with the device, a first inlet wire connected with a first power source, and a second inlet wire connected with a second power source. A breaker of the bus and a breaker of the first inlet wire are switched on, and the breaker of the bus and a breaker of the second inlet wire are switched off. The switching method comprises the step 11 of monitoring at least two electrical parameters of the first inlet wire, the step 12 of judging the power source failure and executing the step 13 if the two electrical parameters are in the failure section corresponding to the electrical parameters, and otherwise executing the step 11, and the step 13 of switching off the breaker of the bus and the breaker of the first inlet wire, and switching on the breaker of the bus and the breaker of the second inlet wire. The method and the device greatly shorten the time of failure judgment, and improve the accurate rate of judgment.
Description
technical field [0001] The invention relates to the related technical field of coal mine system power supply, in particular to a coal mine system power supply switching method and device. Background technique [0002] A coal mine system includes at least one device as a load, a bus bar connected to the device, a first incoming line connected to a first power source, and a second incoming line connected to a second power source, and the bus bar and the first incoming line The circuit breaker is closed, and the circuit breaker of the busbar and the second incoming line trips. During normal operation or maintenance, it is necessary to transfer the load. Since the two power sources come from different power points of the power supply system, the power supply bureau does not allow ring closure. Therefore, when the load is transferred manually, it is necessary to trip the busbar and the circuit breaker of the first incoming line. Open, then close the circuit breaker with the seco...
Claims
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Inventor 田自明陈建东李瑞芳马磊李志平肖威
Owner CHNA ENERGY INVESTMENT CORP LTD