Why is the property not allowed to install charging piles?

There is no doubt that new energy vehicles will become the mainstream direction of automobile development in the future, at least for China. With the continuous promotion and development of new energy vehicles, some practical problems are in front of us. For example, we bought an electric car and now we want to install an electric car charging pile in our community, but the property replied: "No! The electricity load of the community is limited, and it is impossible to install such a high-power charging pile. "

Many people think that property is for more than one thing, or for profit. Is that really the case? Actually, there are practical reasons.

For example, the relationship between distribution network and electric vehicles.

Power grid and electric vehicle are like fish and water, which are interdependent, mutually restricted and influenced.

Power grid is mainly composed of transmission network and distribution network. The transmission network is simply composed of high-voltage lines erected above telephone poles and underground high-voltage lines, which are used to transmit electricity. The distribution network is connected to the transformer from a certain point in the transmission network, and then switches of all sizes are connected under the transformer, and then distributed to all places where electricity is used.

Power transmission network is like aortic blood vessels, which transport blood on a large scale; The distribution network is like a capillary, which shunts the blood in the aorta to the tissue for nutrition.

The appearance of electric vehicles, like the sudden emergence of tissue cells that continue to eat, did not affect the aorta (transmission network), but impacted and even destroyed the fragile capillaries (distribution network).

For the distribution network, the emergence of electric vehicles is a huge terminal load (high power and high current), and the current distribution network is a bit at a loss. However, if the current distribution network cannot adapt to the development of electric vehicles and provide corresponding powerful transmission capacity, the charging problem of electric vehicles will greatly hinder the development and popularization of new energy vehicles in the future. The backwardness of distribution network will undoubtedly become the main problem in the development of electric vehicles.

At present, most transformers in residential areas in China are 640-800KVA, that is, 640KW-800KW. Now, with the increase in the use of various household appliances, the electricity consumption in many residential areas is increasing steadily. Now suddenly the electric car has been killed, and charging piles have to be installed in parking spaces. At present, the mainstream AC slow charging charging piles on the market are all 7KW. Suppose there are 200 parking spaces in a residential area, and there are only a few electric vehicles at present. The load occupied by charging piles is about tens of kilowatts, which has little impact on the power grid of the residential area. However, with most owners replacing electric vehicles and installing charging piles, the power load occupied by dozens of charging piles will reach several hundred kilowatts, which has a huge impact on the community power grid.

The charging behavior of the community is generally after everyone comes home from work, and the owner usually plugs in the charging gun after going home the next day. In addition, at this time, the electricity consumption for lighting, cooking, entertainment and other activities in the home has entered the peak period. In addition, the electric vehicle grabs the load, the peak increases, and the distribution network is overloaded, which is easy to cause fire or trip.

This is why some properties say that for the safety of electricity consumption in the community, they will definitely install charging piles for you.