Multifunctional electric fire early warning system and early warning method thereof

Abstract

The invention discloses a multifunctional electric fire early warning system, which comprises an electric fire backstage monitoring system, an alarming module, an electric fire monitoring device, a driving module and a control device, wherein the electric fire monitoring device can monitor zero line current, harmonic, residual current and line temperature; the electric fire monitoring device monitors working parameters of an electric line and uploads the parameters to the electric fire backstage monitoring system; the electric fire backstage monitoring system controls the alarming module to give an alarm; and the driving module drives the control device according to control signals. The invention also discloses a multifunctional electric fire early warning method. The method comprises steps: the line parameters are acquired; whether the parameters exceed a threshold is judged; alarming signals and an event record are generated; the data and the event record are uploaded; early warning, presetting and compensation events are generated and reported; and a control instruction is issued, and alarming, control and compensation signals are outputted. The electric line operation data can be monitored thoroughly to realize fire alarming, and the functions are complete.

Description

technical field [0001] The invention specifically relates to a multifunctional electrical fire early warning system and an early warning method thereof. Background technique [0002] With the development of national economy and technology and the improvement of people's living standards, intelligent security systems have been widely used in people's production and life, and play a huge role. As one of the most important parts of the intelligent security system, the electrical fire early warning system and its early warning scheme are undoubtedly the focus of people's research. [0003] However, with the large-scale use of nonlinear loads and new energy sources, the harmonic pollution of the line is very large (especially the odd harmonics such as 3, 5, 7, and 9, especially the 3rd harmonic), and the three-phase The third harmonic (and multiple harmonics of 3) will not cancel each other on the zero line but will be directly superimposed on the zero line because the phase ang...

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Problems solved by technology

[0003] However, with the large-scale use of nonlinear loads and new energy sources, the harmonic pollution of the line is very large (especially the odd harmonics such as 3, 5, 7, and 9, especially the 3rd harmonic), and the three-phase The third harmonic (and multiple harmonics of 3) will not cancel each other on the zero line but will be directly superimposed on the zero line because the phase angle is a multiple of 360°; secondly, the three-phase harmonic caused by the nonlinear load The pulse current will not cancel each other on the zero line, but will be superimposed on the zero line; in addition, due to the three-phase unbalance of the load (for example, at a certain moment), the three-phase vector sum is not zero and superimposed on the zero line; The above conditions will cause the zero line current overload

Moreover, the current safety regulations stipulate that the overcurrent protection device is not allowed to be installed on the neutral line, which has caused a situation where the fire on the neutral line cannot be controlled.

[0004] Existing electrical fire safety products are mainly based on residual current and temperature technology for post-fire alarm after fire failure, focusing on leakage monitoring, single monitoring data, and ignoring many other important factors such as neutral current, harmonics, and imbalance, and Prediction, early warning, and pre-control methods and systems realized by applying these data; moreover, traditional fire alarm systems are highly dependent on on-site equipment, require manual intervention, have poor real-time performance, fail to prevent, and delay the best time for disaster relief

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