In industrial power consumption, voltage drop at the end of the line is an issue that electricity consumers must also consider. This article addresses this point, analyzes the causes of low end-of-line voltage, and provides optimization suggestions for reference.
Low voltage at the end of the line is mainly caused by the following reasons:
- High peak load and heavy line load;
- Small diameter and excessive length of the power supply line;
- Concentrated power distribution, lacking widespread coverage.A common adjustment method is to improve the balance of power transmission, install compensation devices at the end of the line, and fully enhance voltage stability.
Under existing power supply technologies, the following solutions are available:
- Grid-side measures:Upgrade the power grid, using the substation bus as a reference to adjust the tap changer of the main transformer. Utilize switched capacitors to reduce voltage drops caused by reactive current, thereby mitigating the downward trend of line voltage.
- Consumer-side measures:The main approach is to reduce line length, increase reactive power compensation, and improve power quality. Specific measures include:
- Shorten the power supply line and install additional distribution transformers.
- Replace the power supply cable with thicker wiring to reduce line losses.
- Install SVG active power balancing devices or dynamically distribute three-phase loads.
- Use end-of-line voltage regulation devices to improve voltage stability.
- Add filtering devices.
- Increase the power factor to enhance the line’s reactive power compensation capability.
Shenzhen Shentebian Electric Equipment Co., Ltd. is a wholly-owned subsidiary of the Jishengchang Group. Founded in 2004, the company operates its own industrial park and is an advanced, well-established professional transformer manufacturer. It was one of the earliest enterprises in Shenzhen to enter the power transformer manufacturing industry. STB is the transformer brand under Shenzhen Shentebian Electric Equipment Co., Ltd.
