Is capacitor compensation required for the 10KV power supply provided by the power company?
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Is capacitor compensation necessary for the 10KV power supply provided by the power company? If the voltage is reduced from 10KV to 0.4KV, and compensation is carried out at the 0.4KV low-voltage level, is it then unnecessary to perform capacitor compensation at the busbar in the incoming cable cabinet? If I use a 10KV line to connect to another substation as the incoming line, and then divide this 10KV supply into multiple branches to supply loads with 0.4KV voltage as well as 10KV high-voltage motors, it is sufficient to carry out 10KV compensation on-site; these loads do not affect the capacitive compensation using the 10KV power supply provided by the power company, right?
Electrical elite? Let’s find some time to discuss it. It seems that it’s also possible to operate at 10 KV without capacitor compensation; high-voltage compensation should only be considered if motors operating at 10 KV are used
Compensation can be done either at high or low voltage; the key issue is that if your power factor is low, the electricity company will increase the price per unit of electricity.
It is necessary; it can be on the low-voltage side or the high-voltage side. If compensation is to be carried out on the high-voltage side, it is decided whether to perform local compensation for the high-voltage motor based on the load power factor.
For reactive power compensation, on-site compensation yields the best results. For compensation at high voltage levels, harmonic control is sufficient.
For reactive power compensation, on-site compensation yields the best results. ——Have you done this before? Compensation at high voltage is sufficient only for harmonic suppression — why? High-voltage reactive power compensation is based on the principle of ensuring that the power factor on the high-voltage side meets the requirements, with no compensation applied either at the high voltage or low voltage level; the lower value is adopted rather than the higher one. Whether harmonic control is necessary depends on the level of harmonics; no harmonic control is required if there is no inverter. Devices with frequency converters don’t necessarily require specialized harmonic mitigation.
If a 10KV power supply is equipped only with a 400V transformer and downstream loads, then a capacitor compensation device needs to be installed on the low-voltage side; depending on the electrical equipment connected to that side, reactors or filters may also be required. If the 10kV power supply is equipped not only with 0.4KV devices but also with high-voltage 10kV equipment, then a 10kV capacitive compensation device must be installed on-site to improve the power factor.
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It’s definitely best to provide compensation at the load side, as this reduces the current in the circuits, saves energy, and improves safety. I’ve seen accidents occur frequently in the high-voltage capacitor banks of a certain steel plant; however, that was done to address harmonic issues, and there was no other way.