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应用于天然气输配站中的电气设备必须满足防爆要求,本质安全型电气设备是最佳的防爆形式。以电源为本质安全电气设备为研究对象,通过建立精确的电源电路时变模型,结合实验波形,研究了电感分段放电特性及其分断火花的引燃能力与电路参数的关系。基于最小点燃释放能量理论,以同时满足本质安全特性要求及电气性能指标为目标,提出了一种电感、电容参数优化设计方法,通过数值分析获得了最优化参数的取值范围。实验结果表明:参数优化后的电路,在满足本质安全性能指标的同时,输出纹波电压仅为输出电压的1.25%,也满足了电气性能指标,是一种可行的参数优化方法,大大提高了电气设备的安全性能。
Electrical equipment used in natural gas distribution stations must meet explosion-proof requirements. Intrinsically safe electrical equipment is the best form of explosion protection. Taking the power supply as intrinsically safe electrical equipment as the research object, this paper studied the characteristics of the segmented discharge of the inductor and the relationship between the ignitability of the spark and the circuit parameters by establishing a precise time-varying model of the power supply circuit and combining the experimental waveforms. Based on the theory of minimum ignition and release energy, an optimization design method of inductance and capacitance parameters is proposed to meet the requirements of intrinsic safety characteristics and electrical performance at the same time. The range of optimization parameters is obtained through numerical analysis. The experimental results show that the circuit with optimized parameters meets the intrinsic safety performance requirements, and the output ripple voltage is only 1.25% of the output voltage, which also meets the electrical performance index, which is a feasible parameter optimization method and greatly improves the Electrical equipment safety performance.