电网不平衡状态下24脉波整流系统仿真研究

提高电网电能质量问题,由于电网电压不平衡影响安全供电系统,针对在大功率整流器领域中,采用多相整流技术来降低整流电路谐波含量,提高功率因数,但对电网电压不平衡情况下多脉波整流系统不能满足要求的情况,研究了一种新型24脉波整流系统,利用电压电流输出特性,建立模型在MATLAB上对比分析了不同程度电网不平衡对多脉波整流电路输出波形的影响,结果对电网不平衡情况下整流系统输出电压、电流的谐波含量进行仿真分析证明,电网提高了平衡能力,表明24脉整流系统与传统的整流方式相比具有更好的抗电网不平衡干扰的能力,在电力系统中具有更广阔的应用前景。

Simulation of 24 -pulse Rectification System under Unbalanced Input Voltage Conditions

Voltage unbalance has great impacts on power electronic equipments.Multi-pulse rectification is widely used in high-power field to reduce harmonics and increase power factor.At present,there is no exhaustive analysis of the voltage unbalance’s impacts on rectification system.A new 24-pulse rectification system was studied and simulated by MATLAB in this paper.Its output characters were also presented.The impacts of unblanced input voltage on different multi-pulse rectification systems were compared and their harmonics were analysised.It was proved that compared with conventional ones,the 24-pulse rectification system has a better ability to resist the unbalanced input voltage.And the 24-pulse rectification system has broader application prospects in the power system.