What are the nonlinear load, impact load, asymmetric load and safety load in residential electrical equipment?

1, the so-called "nonlinear load, impact load, unsymmetrical load" is a large equipment for large industrial users, which has an impact on the normal electricity consumption of other users, so it should be managed; The capacity of "nonlinear load, impact load and asymmetric load" in residential quarters is too small to be managed.

2. The nonlinear load is mainly the power load of the equipment that will cause harmonics. We commonly have rectifier equipment, arc ignition equipment and equipment with iron core. There are TV sets, inverter air conditioners or chargers such as refrigerators and mobile phones for household rectification; The arc equipment community is mainly electric welding machines; The core equipment community is mainly transformers. The harmonics generated by these devices are very small, so we have no simple way and there is no need to control them.

3. There are many impact loads, so the input of equipment is theoretically an impact on the power grid, especially when the motor equipment is started with load. The start-up amount of household refrigerator air conditioner is large, and the biggest one is the start-up of some elevators and fire pumps used in the community.

4. Asymmetric load is suitable for high voltage system. Low-voltage systems, especially household electricity, are all single-phase electricity, and it is impossible to balance themselves. This mainly depends on the layout of the community. Try to connect each family to a different three-phase, but no matter how good the connection is, some families may not live long; The best way is to adjust after a period of operation and strengthen the follow-up management;

5. The security load is aimed at some important loads, such as elevators and fire fighting. , there should be a standby power supply for this important part of the load, that is, the security load; This part is solved by dual power supply.