Relay protection device and protection method based on double isomorphic CPU board cards
A relay protection and board card technology, applied in emergency protection circuit devices, circuit devices, emergency protection device parts, etc. and other problems, to avoid logical judgment errors, reduce fault analysis time, and improve reliability and rapidity.
Inactive Publication Date: 2017-09-22
积成软件有限公司
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Problems solved by technology
Solution 1 is simple to implement, but it cannot effectively monitor and prevent malfunctions when a CPU board fails. Solution 2 uses dual CPU boards to monitor each other, but the information obtained by the two CPU boards is different. The main CPU board can obtain complete device information and execute start-up and protection logic, while the slave CPU board can only obtain part of the device information and only execute start-up logic
Although the second scheme adopts the dual-CPU board scheme, only the main CPU board internally executes the protection logic judgment program, which cannot avoid the logic judgment error caused by the defect in the algorithm principle
In addition, the device information obtained by the two CPU boards is different. Once a malfunction or refusal occurs, the log and wave recording can only be called up from the main CPU board, and the information in the device cannot be compared, making it difficult to find out. question
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[0022] Below in conjunction with embodiment the present invention will be further described.
[0023] figure 1 The relay protection device based on isomorphic dual CPU boards includes: a power supply (PWR) board, two CPU boards, a human-machine dialogue (HMI) board, and several AC analog input (AC) boards , Several DC digital input (DI) boards, several digital output (DO) boards and a motherboard, two CPU boards are connected to the analog signal port of the AC analog input (AC) board; The two CPU boards are respectively connected with the DC digital input (DI) board and digital output (DO) board through the I / O Bus on the motherboard to complete the data exchange; the power board is connected through The motherboard is connected with other boards to supply power for the rest of the boards; the human-machine dialogue (HMI) board communicates with the two CPU boards to modify the setting information of the CPU boards; the two CPU boards The hardware structure is exactly the s...
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The invention discloses a relay protection device and protection method based on double isomorphic CPU board cards. Two CPU board cards are adopted to respectively acquire an alternating current quantity signal and a direct current switching value signal; based on the acquired signals, two CPU board cards adopt different protection logic judgment algorithm to carry out protection startup logic and protection action exit logic judgment and respectively send judgment results to a switching value output board card; and finally, according to a combination structure of a protection startup logic and a protection action exit logic of two CPU board cards, a response is made.
Description
technical field [0001] The invention belongs to the field of relay protection of electric power systems, in particular to a relay protection device and protection method based on isomorphic double CPU boards. Background technique [0002] With the development of relay protection devices and the improvement of the requirements for the stability of the power grid, now high-voltage relay protection devices generally use dual AD sampling loops to increase the reliability of sampling and prevent the device from malfunctioning after AD sampling problems The phenomenon. The design of the dual AD sampling circuit has brought about a new design scheme of the relay protection device: one is that the dual AD sampling circuit is implemented in one CPU board, and the other is that the dual AD is realized by two CPU boards with a single AD sampling circuit. Features. Solution 1 is simple to implement, but it cannot effectively monitor and prevent malfunctions when a CPU board fails. Sol...
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IPC IPC(8): H02H1/00
CPCH02H1/0084
Inventor 徐秦臧云利郑小军任广宇袁业剑陈某舟胡华威刘大亮
Owner 积成软件有限公司