A method for judging and correcting the abnormality of the protection auxiliary signal of pumped storage unit
A pumped storage unit and auxiliary signal technology, which is applied in hydroelectric power generation, mechanical equipment, engine components, etc., can solve the problems of auxiliary signal abnormality, protection action shutdown, etc., and achieve the effect of preventing auxiliary signal abnormality
Active Publication Date: 2017-03-08
广东蓄能发电有限公司 +2
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[0004] The purpose of the present invention is to provide an auxiliary signal abnormality discrimination and redundancy correction method required for identifying the operating conditions of a pumped storage unit, so as to solve the problem that the protection action shutdown caused by the abnormal auxiliary signal in the past
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[0024] Such as figure 1 As shown, the pumped storage unit operating condition identification auxiliary signal abnormality discrimination and redundancy correction method of the present invention is divided into the following steps: (1) constructing auxiliary signal logical relationship table and electrical quantity characteristics corresponding to the operating mode Data group; (2) Collect all auxiliary signal input information and the current electrical characteristics of the unit. The auxiliary signals include the auxiliary signal of the monitoring system working condition and the auxiliary signal of the switch position contact; (3) According to the different input methods of the auxiliary signal, the auxiliary signal self-test is adopted , auxiliary signal logic relationship verification, unit electrical quantity characteristic verification and other methods to judge and correct the abnormality of the auxiliary signal. Correct the status of the auxiliary signal. If the corr...
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The invention discloses a distinguishing and correcting method for auxiliary signal anomaly for pumped storage group protection. The distinguishing and correcting method includes steps that (1) constructing an auxiliary signal logic relationship table and an electric quantity characteristic data set corresponding to a running mode; (2) gathering all the auxiliary signal input information and current electric quantity characteristic of the group, wherein the auxiliary signals include auxiliary signals of the working condition of a monitoring system and auxiliary signals of a switch position contact; (3) using an auxiliary signal self-inspection method, a verification method for the logic relationship between auxiliary signals and an electric quantity characteristic verifying method for the group to distinguish and correct the auxiliary signal anomaly according to the difference between auxiliary signal input modes, after distinguishing the auxiliary signal anomaly, quickly sending out an alarm signal to remind an operation person to process, if the auxiliary signals can be corrected successfully, correcting the auxiliary signal state, otherwise, providing block signals for the protection logic judgment. The distinguishing and correcting method is capable of realizing the distinguishing and correcting for the auxiliary signal anomaly for the pumped storage group protection.
Description
technical field [0001] The invention relates to the field of relay protection, in particular to a method for judging and correcting abnormalities of auxiliary signals required for identification of protection operating conditions of a pumped storage unit. Background technique [0002] There are many operating conditions for pumped storage units, including more than ten working conditions such as water pump working condition, water pump phase modulation working condition, power generation working condition, power generation phase regulating working condition, SFC starting working condition, and back-to-back starting working condition. The relationship between processes is complex and the conversion is frequent. However, there are more than 30 protection functions for large-scale pumped storage units. Under certain working conditions, some protection functions are not applicable, which may lead to protection actions. The corresponding protection needs to be blocked according t...
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IPC IPC(8): F03B13/06F03B15/00
CPCY02E10/20Y02E60/16
Inventor 贺儒飞王光李贻凯陈俊聂航王凯程诗明
Owner 广东蓄能发电有限公司