Control method for automatically choosing effective signal
A control method and technology of effective signals, applied in electrical components, emergency protection circuit devices, etc., can solve problems such as poor reliability and accuracy, and achieve the effect of improving reliability and accuracy and ensuring safe and stable operation.
Inactive Publication Date: 2016-02-10
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD +2
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Problems solved by technology
[0003] The current practice in the field is that the hard contact signal is used as the action signal, and the optical fiber signal is only used as a reference. The disadvantage is poor reliability and accuracy.
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Embodiment 1
[0039] Such as figure 2 As shown, the control method for automatically selecting an effective signal in this embodiment includes the following steps:
[0040] A. The same signal has two signal source inputs, the default signal source and the backup signal source; the default signal source is a hard contact signal, and the backup signal source is an optical fiber signal;
[0041] B. The hard contact signal is input by the pole control A hard contact signal and the pole control B hard contact signal in parallel, and mutual checking is carried out; the optical fiber signal is parallel input by the pole control A fiber signal and the pole control B fiber signal, and are mutually checked. checking;
[0042] C. Select the hard contact signal as the effective signal;
[0043] D. Judging whether the hard contact signal of pole control A and the hard contact signal of pole control B are consistent;
[0044] E. When the hard contact signal of pole control A and the hard contact sign...
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The invention provides a control method for automatically choosing an effective signal. The method comprises the steps as follows: (A) the same signal is provided with a default signal source and a standby signal source as two signal source inputs; (B) each signal source is input from two sub-signals in parallel, and mutual checking is carried out; (C) the default signal source is selected as an effective signal; (D) whether two sub-signals of the default signal source are consistent or not is judged; (E) when the two sub-signals of the default signal source are consistent, the signal of the default signal source is output as a recognition result; when the two sub-signals of the default signal source are not consistent, the standby signal source is switched as the effective signal; (F) whether two sub-signals of the standby signal source are consistent or not is judged; and (G) when the two sub-signals of the standby signal source are consistent, the signal of the standby signal source is output as the recognition result; and when the two sub-signals of the standby signal source are not consistent, the standby signal source is warned and locked and a corresponding control strategy is locked. According to the method provided by the invention, the reliability and the accuracy of the signal of a safe automatic control device can be improved; and safe and stable operation of a power grid is ensured.
Description
technical field [0001] The invention relates to a safety automatic control device for an electric power system, in particular to a control method for automatically selecting effective signals. Background technique [0002] With the continuous development of the power system, especially the continuous emergence of regional AC and DC interconnection systems, the system operation mode is becoming more and more complex, and the security and stability of the power grid are becoming more and more prominent. In order to ensure the safe and stable operation of the power grid, it is necessary to configure a safety automatic control device. Each device can automatically identify component or system faults based on the collected information such as voltage, current, and switch position. In order to accurately identify system faults, the reliability and accuracy of the signal source The requirements also put forward higher requirements, especially in the field of automatic control devic...
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IPC IPC(8): H02H7/26
Inventor 周柯杜斌孙志媛孙艳刘默斯李凌熊莉王刚李明珀
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD