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农网末端电压无冲击软起动方法研究

Impact Free Soft Start Method for Terminal Voltage in Rural Distribution Networks

  • 摘要: 文章提出一种集成智能检测、动态电压补偿与无扰软起动的综合治理系统。系统通过将原有单相供电重构为两相输入,并采用以树莓派为核心的闭环控制策略,实时采集电压、电流及漏电信号,驱动无触点继电器动态调整补偿变压器抽头,确保用户端电压稳定在220 V ± 10%的国家标准(GB/T 12325-2008)允许范围内。测试结果表明,在130~300 V宽范围输入条件下,系统补偿效果显著,输出电压波形无畸变,且具备过流与漏电保护功能。该研究为解决长距离小线径农村电网的低电压问题提供了一种可靠、经济且易于推广的技术方案。

     

    Abstract: This paper proposes an integrated mitigation system combining intelligent detection, dynamic voltage compensation, and disturbance free soft start. The system reconstructs the original single phase power supply into a two phase input and adopts a closed loop control strategy centered on a Raspberry Pi to collect voltage, current, and leakage current signals in real time. It drives solid state relays to dynamically adjust the taps of the compensation transformer, ensuring that the user side voltage remains within the national standard range of 220 V ± 10% specified in GB/T 12325-2008. The test results show that, under a wide input voltage range of 130 V to 300 V, the system achieves significant compensation performance, the output voltage waveform has no distortion, and the system provides overcurrent and leakage current protection. This study provides a reliable, economical, and easily applicable technical solution for low voltage problems in rural distribution networks with long supply distances and small conductor cross sections.

     

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