Digital measurement and control device offline detection system and method based on merging unit

Abstract

The invention discloses a digital measurement and control device offline detection system and a method based on a merging unit. The system comprises a control center server and two comprehensive detection devices which are in wireless connection with the control center server. The method comprises the following steps: 1, connecting the comprehensive detection devices and a voltage loop merging unit in parallel; 2, connecting the comprehensive detection devices and a current loop merging unit in series; 3, connecting the two comprehensive detection devices to the control center server in a wireless mode; 4, the control center server formulating a field test scheme to send it to the two comprehensive detection devices; and 5, the control center server receiving the current, the voltage and the power factor value actually output by the two comprehensive detection devices, and comparing the current, the voltage and the power factor value with the measurement results of the digital measurement and control device to calculate a detection error. The digital measurement and control device offline detection system and the method based on the merging unit is convenient to implement and highin working reliability, can well meet the requirement of digital measurement and control device offline detection, and provides a guarantee for safe and stable operation of a transformer substation.

Description

technical field [0001] The invention belongs to the technical field of intelligent substations, and in particular relates to an off-line detection system and method for a digital measurement and control device based on a merging unit. Background technique [0002] The measurement and control device (that is, the AC sampling device) is the data source of the SCADA system of the substation. The accuracy and reliability of its current and voltage measurement are the key factors for the safe and stable operation of the substation. The current and voltage of the digital measurement and control device of the intelligent substation are passed through different The current combining unit and the voltage combining unit are sampled. Since the current combining unit and the voltage combining unit belong to different devices, the parameter configuration of the combining unit directly affects the synchronization and accuracy of the sampling data. Therefore, it is very necessary to combine...

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Problems solved by technology

[0002] The measurement and control device (that is, the AC sampling device) is the data source of the SCADA system of the substation. The accuracy and reliability of its current and voltage measurement are the key factors for the safe and stable operation of the substation. The current and voltage of the digital measurement and control device of the intelligent substation are passed through different The current combining unit and the voltage combining unit are sampled. Since the current combining unit and the voltage combining unit belong to different devices, the parameter configuration of the combining unit directly affects the synchronization and accuracy of the sampling data. Therefore, it is very necessary to combine the current combining unit and the voltage combining unit to develop On-site testing of digital measurement and control devices in smart substations, the off-line detection method is suitable for on-site testing before the substation is put into operation. Because the existing detection devices cannot output synchronously, the power factor of the output current and voltage cannot be determined, and the active power of the measurement and control devices, Measurement functions such as reactive power and power factor cannot be detected, and on-site detection of digital measurement and control devices in smart substations cannot be effectively carried out

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