A method to realize the automatic correction of the precision of the protection measurement and control device
A technology of protection measurement and control and automatic calibration, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of inapplicability on the engineering site and achieve the effect of simple operation method
Active Publication Date: 2020-07-28
NR ELECTRIC CO LTD +1
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[0003] The Chinese invention patent with the patent number CN201410626332.0 proposes a method for accuracy correction of an analog input type merging unit, but this method relies on the test case of the host computer and the debugger with the specified interface, and is suitable for use before the device leaves the factory. Be applicable
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[0021] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0022] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0023] like figure 1 As shown, the present invention provides a method for realizing the automatic correction of the accuracy of the protection measurement and control device, comprising the following steps:
[0024] (1) Configure the voltage and current types and their reference values of each channel of the AC plug-in offline through the configuration tool, generate a configuration file and download it to the protection measurement and control device;
[0025] like figure 2 As ...
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The invention discloses a method for automatically correcting accuracy of a protection and monitoring device. The method comprises the following steps: configuring voltage and current types of each channel of AC plug-in and reference values thereof, generating a configuration file and unloading the configuration file into the protection and monitoring device; applying analog quantities corresponding to the reference values to various channels used by the protection and monitoring device by a relay protection testing device after the protection and monitoring device is started; executing an automatic accuracy correction command by an operator according to a menu of the protection and monitoring device, performing accuracy correction calculation on CPU in the protection and monitoring device, and storing the calculated accuracy coefficient of each channel. The voltage / current quantity is applied to the AC plug-in of the protection and monitoring device by adopting the relay protection testing device, the automatic accuracy correction method is realized by using the protection and monitoring device, and a process of enabling the device manufacturer to participate in correction is eliminated, so that an operator in an engineering field can conveniently and efficiently complete the accuracy correction of the AC plug-in.
Description
technical field [0001] The invention belongs to the technical field of electric power system relay protection, and in particular relates to a method for automatically correcting the precision of a protection measurement and control device. Background technique [0002] There must be certain errors in the AC plug-in of the protection measurement and control device. In engineering applications, the accuracy of the AC plug-in used in the device must be calibrated in advance to obtain the accuracy coefficient of each channel of the AC plug-in. When the device is running, the actual sampling value is calculated according to the accuracy coefficient of each channel. Make corrections. At present, the AC plug-in is generally calibrated by the manufacturer before leaving the factory and the accuracy coefficient of each channel is stored in the device, and no modification is required during the on-site debugging and operation stages. When the AC plug-in of the device does not meet th...
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IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 于皎文继峰周强徐东方刘伟李德文周进侯先栋
Owner NR ELECTRIC CO LTD