Abstract: A method and a system for optimization to non-contact micro intelligent sensing in secondary DC loop potential are provided, including demodulating a weak AC current modulation signal through a demodulation circuit and amplifying the weak AC current modulation signal; amplifying the weak AC current modulation signal to output a stable and amplified measurable potential signal; processing the potential signal for noise to obtain a stable DC potential signal; inputting the DC potential signal to a comprehensive computing module for analysis and processing; using micro sensors to measure information. The measured potential results are input to the comprehensive computing module to analyze and correct, and the measurement results are output to the communication module for external output. The equipment is packaged to form a potential collection “probe” and a potential measurement “unit”. The potential measurement “unit” supports multiple potential collection “probes” for accessing.

Abstract: The invention discloses an intelligent operation and maintenance control platform and system for a secondary power system, belonging to field of power system operation and maintenance technology. The platform includes a interval layer, a transmission layer, a station control layer, a system layer, a platform layer, an application layer, and a disaster recovery backup centre. By collecting data from a security system and external information system, and sharing data with other application platforms of a secondary system, problems of omission, repetition, and isolation in current data collection are solved.

Abstract: A method for online monitoring of temperature in current terminal blocks based on thermal imaging are provided, including: obtaining real-time temperature distribution information of current terminals of a terminal box; using an external communication substation to upload the obtained real-time temperature distribution information to the secondary intelligent operation-and-maintenance control platform; determining whether there is an abnormality in temperature of the current terminals, if there is an abnormality, issuing an alarm message about potential danger for an open circuit of a current secondary circuit. The method provided by the present invention has a self-verification function of measurement data and can suppress the influence of ambient temperature.