The application of ultra-high voltage transmission technology has made long-distance transmission of electrical energy more efficient. But as the voltage increases, the stability and safety issues of the system become increasingly prominent. Therefore, high-voltage shunt reactors are often installed between the end of ultra-high voltage transmission lines and the ground to solve problems. Some high-voltage end users have questions, why is the high-voltage reactance connected between the end of the ultra-high voltage transmission line and the ground?
High voltage shunt reactors are usually installed between the end of ultra-high voltage transmission lines and ground for the following main reasons:
1. Grid stability and voltage regulation:
Ultra high voltage transmission lines may experience voltage fluctuations or harmonic problems during operation due to load changes or other reasons. Parallel reactors can provide inductance compensation, stabilize grid voltage, reduce voltage fluctuations, and help improve grid stability and voltage regulation capabilities.
2. Overvoltage protection:
In the event of a sudden fault or disconnection of the load on the transmission line, overvoltage may occur. Parallel reactors can absorb some of these overvoltages, protecting transmission equipment and lines from damage.
3. Harmonic filtering of power grid:
There may be harmonics from loads or other power equipment in the transmission system, which can affect the stability of the power grid and the normal operation of equipment. Parallel reactors can filter out some harmonics and improve the electromagnetic compatibility of the power grid by providing inductance.
4. Current control and stability:
Parallel reactors can help control current, especially under high load conditions, to maintain the stability of the power grid's current and prevent equipment damage or system overload caused by excessive current.
5. Reduce losses:
By compensating inductance, current losses in transmission lines can be reduced and transmission efficiency can be improved.
Therefore, installing high-voltage shunt reactors between the end of ultra-high voltage transmission lines and the ground can not only improve the stability and reliability of the power grid, but also effectively protect transmission equipment from overvoltage and harmonic effects. It is one of the important components of modern power systems.