Optimization Analysis of 1 kHz High Frequency De-icing for Medium Voltage Transmission Lines

PAN Yifan; ZHOU Yusheng; ZHOU Wenqing; LIU Yingjie; HUANG Xiaoqi

doi:10.14044/j.1674-1757.pcrpc.2024.03.014

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Optimization Analysis of 1 kHz High Frequency De-icing for Medium Voltage Transmission Lines

Research on System Application | 更新时间：2024-09-14

- Optimization Analysis of 1 kHz High Frequency De-icing for Medium Voltage Transmission Lines
- Power Capacitor & Reactive Power Compensation Vol. 45, Issue 3, Pages: 106-113(2024)
- 作者机构：
  
  长沙理工大学电气与信息工程学院，长沙　 410114
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2024.03.014
  CLC：
- Published：2024-06，
  
  Received：08 November 2023，
- 稿件说明：
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PAN YIFAN, ZHOU YUSHENG, ZHOU WENQING, et al. Optimization Analysis of 1 kHz High Frequency De-icing for Medium Voltage Transmission Lines. [J]. Power capacitor & reactive power compensation, 2024, 45(3): 106-113.
DOI：

PAN YIFAN, ZHOU YUSHENG, ZHOU WENQING, et al. Optimization Analysis of 1 kHz High Frequency De-icing for Medium Voltage Transmission Lines. [J]. Power capacitor & reactive power compensation, 2024, 45(3): 106-113. DOI： 10.14044/j.1674-1757.pcrpc.2024.03.014.

摘要

中压输电线路冬季覆冰范围广，由于线路长度较短，采用直流和工频交流融冰困难，导致断线、倒杆和冰闪跳闸事故频发。本文提出在中压输电线路采用1 kHz高频融冰的方法，分析了不同高频融冰接线方式、线路分布参数以及无功补偿对融冰效果的影响及其可行性。以LGJ-240/30导线为例，在频率1 kHz电流762 A作用下，融冰仿真实验结果表明，对于较短线路，在线路长度不超过36.3 km时，融冰时间受分布参数的影响产生的差值小于1%，可以忽略不计；结合10 kV线路绝缘耐压水平，采用频率1 kHz的交流融冰适合于供电半径小于5 km的短线路，且应采用三相短路的融冰接线方式和分段串联电容补偿措施，可满足线路绝缘水平，有效降低融冰电压和融冰电源的容量。

Abstract

Medium voltage transmission lines have a wide ice-coating range in winter which

due to the short length of line

is difficult to use DC and power frequency AC for de-icing and leads to frequent occurrence of such faults as line breakage

ruined tower and tripping because of ice flash.In this paper

the 1 kHz high frequency de-icing method is proposed. The influence and feasibility of different high frequency de-icing wiring methods

the line distribution parameters and the reactive power compensation are analyzed. The LGJ-240/30 wire is taken as an example

under the action of current at 762 A and the frequency at 1 kHz

the de-icing simulation experimental results show that in case of length of wire is no more than 36.3 km

the difference of the de-icing time influenced by the distribution parameters is less than 1% and can be ignored; In combination with the insulation withstanding level of line at 10 kV

the AC de-icing with the frequency at 1 kHz is suitable for the short line with power supply radials less than 5 km. The use of the de-icing wiring method of three phase short circuit and the segmented series capacitive compensation measures can meet the insulation requirement of line

which can reduce effectively the capacity of de-icing voltage and power.

关键词

高频激励融冰中压输电线路介质损耗电流趋肤效应无功补偿

Keywords

high-frequency excitation de-icingmedium voltage transmission linesdielectric losscurrent skin effectreactive power compensation

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