Multifunctional electric fire early warning system and early warning method thereof

Abstract

The invention discloses a multifunctional electrical fire early warning system, comprising an electrical fire background monitoring system, an alarm module, electrical fire monitoring equipment capable of monitoring zero-line current, harmonic and residual current, and line temperature, a drive module and a control device; The fire monitoring equipment monitors the working parameters of the electrical circuit and uploads the parameters to the electrical fire background monitoring system; the electrical fire background monitoring system controls the alarm module to give an alarm; the drive module drives the control equipment according to the control signal. The invention also discloses an early warning method for the multifunctional electrical fire early warning system, which includes acquiring line parameters; judging whether the parameters exceed a threshold value; generating alarm signals and event records; uploading data and event records; Compensation events; issue control commands, output alarm, control and compensation signals. The invention can comprehensively monitor the operation data of the electrical circuit so as to realize the fire alarm, and has complete functions.

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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