本文提出一种基于配对静止无功发生器（SVG）的无功潮流大电流防冰法，据此构建电气化铁路接触网在线防冰系统。为了在接触网防冰的同时使牵引网电压也稳定在允许范围内，以直供单线供电方式为例，推导防冰系统投入后防冰电流与供电臂末端电压的关系，以确定各电气参量之间的关联性。结合贵昆线实测数据，并基于牵引网网压要求，给出不同工况下允许的防冰电流动态范围，分析实际运行工况下在线防冰过程中的接触网沿线温度分布和电压分布，验证了基于SVG在线防冰方案及其电流决策的可行性与有效性。%A reactive power flow large current anti‐icing technology based on static var generator (SVG) was pro‐posed ,whereby the on‐line anti‐icing system for catenary of electrified railway was developed .In order to keep the voltage of the traction power net within the allowable range while eliminating ice on the catenary , under the direct power supply mode , the relations between anti‐icing current and the voltage of the end of power sup‐ply arm after the anti‐icing system was put into service were deduced , to determine the relevance between dif‐ferent electrical parameters .Based on measured data of Guiyang‐Kunming line and the voltage requirement of traction power net , the dynamic range of anti‐icing currents were calculated under different operating condi‐tions . T he electro‐thermal temperature distribution and voltage distribution of catenary during online anti‐icing process under actual operating conditions were analyzed . Results and analysis indicated the effectiveness and feasibility of the on‐line anti‐icing method using SVG .
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