Self-healing device achieving the same current differential protection channel receiving and dispatching path and control method
A protection channel, current differential technology, applied in emergency protection circuit devices, emergency protection devices with automatic disconnection, circuit devices, etc., can solve problems such as malfunction of protection devices, improve reliability, ensure safe operation, solve The effect of node power loss
Active Publication Date: 2015-06-24
STATE GRID CORP OF CHINA +3
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Problems solved by technology
[0003] The purpose of the present invention is to provide a new type of self-healing device and its control method, to solve the problem that the existing SDH self-healing ring has multiple switchings during the power-off (on) self-recovery process, which leads to the malfunction of the protection device, and to ensure that the line longitudinal current Differential protection transceiver path consistency
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[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0016] The present invention provides a self-healing device that realizes the transmission and reception of current differential protection channels on the same path. For the structural block diagram, see figure 1 . The device includes an APS controller, a selection controller, a delay device 1, a decision device, a delay device 2, a cross matrix board, a line interface board and a management interface board. The input of the line interface board is connected to the output of the delayer 2; the input of the delayer 2 is connected to the output of the decision device; the input of the decision device is connected to the output of the cross matrix disk; the second of the decision device The output is connected to the input of the delayer 1; the second output of the delayer 2 is connected to the input of the APS controller; the second input of the ...
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The invention provides a self-healing device achieving the same current differential protection channel receiving and dispatching path and a control method. The device comprises an APS controller, a selection controller, a first time delayer, a judgment device, a second time delayer, a cross matrix disk, a circuit interface disk and a management interface disk. The input of the second time delayer is connected with one output of the judgment device. One output of the second time delayer is connected with the input of the circuit interface disk, and the other output of the second time delayer is connected with one input of the APS controller. The input of the judgment device is connected with the output of the cross matrix disk, and the other output of the judgment device is connected with the input of the first time delayer. The other input of the APS controller is connected with the output of the management interface disk. The output of the APS controller is connected with one input of the selection controller, the other input of the selection controller is connected with the output of the first time delayer, and the output of the selection controller is connected with the input of the cross matrix disk. The device can ensure consistency of the receiving path and the sending path for circuit longitudinal linkage current differential protection.
Description
technical field [0001] The invention relates to a power line protection device and a control method thereof, in particular to a self-healing device and a control method for realizing the transmission and reception of current differential protection channels in the same path. Background technique [0002] The main types of power system line relay protection are line longitudinal current differential protection, distance protection and directional protection. With the development of communication technology, optical fiber is more and more widely used in power system. Line longitudinal current differential protection has gradually become the power line protection in power grid because of its simple principle and is not affected by system oscillation, weak feed and other operation modes. main method of protection. Since the line longitudinal current differential protection adopts the synchronization method based on the data channel, the bidirectional consistency of the delay is...
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Inventor 连纪文谢勇添陆臻卢彤卓秀者李杰张芬芬
Owner STATE GRID CORP OF CHINA