During the operation of the low-voltage capacitor cabinet, what are the causes of voltage fluctuations?

With the development of the national economy and the improvement of people's living standards, a large number of residential buildings, high-end shopping malls and other structures have sprung up, leading to a rapid increase in urban electricity consumption. In these building sites, the majority of the loads used are single-phase inductive loads. Due to their relatively low power factor, a large proportion of reactive power lags behind in the power grid, causing voltage instability to occur frequently.

Voltage instability, the cause of temporary drop:

1. Voltage sags are caused by factors such as lightning strikes, short circuits, grounding, reclosing, startup of high-power motors, and improper operations;
2. In a single-phase-to-ground fault, the voltage of the non-fault phase will temporarily rise; the shedding of large-capacity loads and the insertion of large-capacity capacitor banks can both cause voltage surges;
3. The reclosing of circuit breaker and switchgear may cause a temporary interruption of voltage.

To ensure the power quality for users, reduce the reactive power in the power grid, improve the power supply efficiency and voltage quality of the system, and minimize line losses, capacitor reactive power compensation devices are usually installed in the low-voltage power distribution system for reactive power compensation.

Jingneng Electric is a well-known manufacturer of reactive power compensation devices, and also provides one-stop capacitor cabinet renovation solutions. The main products include: capacitors, reactors, thyristor switching modules, reactive power controllers, low-voltage reactive power compensation complete sets, active power filters, static reactive power generators, and harmonic protectors, etc. Jinneng Electric ensures the quality of your electrical energy, and we look forward to your consultation!