供配电系统通常接有并联补偿电容器，配电网中的高次谐波对电容的影响很大。
Power Supply System is often placed with shunt compensation capacitors and the upper harmonic waves in the distribution network have much influence on the capacity.
讨论了第一临界情形下的平面三次系统高次奇点的局部拓朴结构，并给出利用多项式系数的判断准则。
This paper discuss the locally topological structure of higher order singular point for the plane cubic system in the first critical case and give a criterion by the coefficients of polynomials.
通过对轨道交通供电系统高次谐波产生原因及危害的分析，着重探讨对供电系统谐波抑制的措施。
Through reason and harm analysis which produces to the rail transit power supply system higher harmonic, discusses emphatically to the power supply system harmonic suppression measure.
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