交流窜入直流系统的检测建议

Communication into the Detection of AC Intrusion into DC System

为加深对交流电源窜入直流系统后的危害认识,结合某电厂一起现场交流窜入直流系统实例,以现场所涉及设备的真实测量参数为基础,通过Multisim软件仿真,还原了故障发生时的状态,并对于交流窜入直流系统的现象、特征以及各变量的影响进行了探索。结果表明:交流窜入直流系统单极后,直流系统正负间电压未受影响,接地点的分布电容、电感、电阻对窜入直流系统的交流电压及直流系统对地电压产生了不同影响,由此也间接证明了交流窜入直流系统的复杂性。本文对于交流窜入直流系统的现场实例的现象、数据仿真过程及结果、依据结果提出完善建议进行了详细描述,为现场直流系统运行维护管理提供一些有益的建议。

To deepen understanding of the harm AC intrusion into DC system, combined together in a power plant site AC intrusion into DC system to the real measurement parameters involved in the site device. In real the measurement parameters based, by Multisim simulation software, restoring the state when the failure occurred. And for AC intrusion into DC system phenomena, characteristics, and explores the effects of the variables. The results showed that:After the AC intrusion into DC system Unipolar,DC system between the positive and negative voltage is not affected.Ground of distributed capacitance, inductance, resistance to the AC voltage of AC intrusion into the DC system and DC system on the ground voltage have different influence. It also indirectly proves that the complexity of AC intrusion into DC system. This paper based on AC intrusion into DC system the phenomena and data simulation process and the result has carried on the detailed description,and improving suggestions according to the results, for the DC system for on-site operation maintenance and management to provide some useful suggestions.