脉冲负载下电力系统暂稳态功率特性

发布时间：2019-05-15 12:12

【摘要】：脉冲负载由于其周期性脉动的特点,使电网系统公共母线的功率产生持续的、高峰值脉冲,严重威胁到电力系统的安全稳定运行。针对常用脉冲负载结构,建立了以脉冲负载为主负载的公网和柴油发电机组(60 kW)供电试验平台。基于脉冲负载的工作机理,分别对不同脉冲频率、占空比下的脉冲负载进行联网/脱网试验,对公共母线处的暂态和稳态功率特性进行对比讨论。针对传统平均功率无法准确、有效表征系统稳态功率的问题,提出了基于脉冲频率的瞬时功率平均值(pulsed frequency based instantaneous power average value,PFIPA)的计算方法,试验结果证明,该方法具有一定的合理性和正确性,在联网和脱网电力系统均可适用。所建试验平台及分析结论,对脉冲负载在电力系统中的应用、设计、系统容量、功率分配等方面具有重要意义和参考价值。
[Abstract]:Because of its periodic pulsation, the power of the common bus in the power grid system has a continuous and high peak pulse, which seriously threatens the safe and stable operation of the power system. Aiming at the commonly used pulse load structure, a public network and diesel generator set (60 kW) power supply test platform with pulse load as the main load is established. Based on the working mechanism of pulse load, the network / off-net experiments of pulse load with different pulse frequency and duty cycle are carried out, and the transient and steady-state power characteristics at the common bus are compared and discussed. In order to solve the problem that the traditional average power can not accurately represent the steady state power of the system, a calculation method of instantaneous power average (pulsed frequency based instantaneous power average value,PFIPA based on pulse frequency is proposed. The experimental results show that, This method is reasonable and correct, and can be used in both interconnection and off-grid power systems. The test platform and analysis conclusion are of great significance and reference value for the application, design, system capacity and power distribution of pulse load in power system.
【作者单位】：军械工程学院;
【基金】：国家自然科学基金项目(51307184)~~
【分类号】：TM712

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