Electricity, this mysterious and powerful force, plays a vital role in our daily lives. Whether it is our lighting, air conditioning, electrical equipment, transportation, etc., it is inseparable from it, and it needs the support of electrical energy. In a traditional power grid, can electricity be stored?Are you curious about how it is provided to everyone?In this article, let's take a look at this mysterious power and see how it can serve us all, and how we can achieve power storage.
Power system
The current transmitted when the switch is turned on is generated from the moment the switch is operated. There is no current storage in the grid. Only certain generators can provide this instant "service". The three basic parts of the power system are:
Generator, which generates electricity.
load, using electricity.
Power grids, which connect loads and generators together.
Can electrical energy be stored?
We can turn on and off the lights and appliances we use at any time. Factories can turn on and off large industrial machinery at any time. Electric utilities can even turn on or off the power system throughout the city. This level of control at the consumer end, and the almost always perfect response of the power system to provide the required power, leads to a false perception of how the power system can provide this current immediately. One imagined that the grid must contain stored current, immediately available on the other side of the switch.
The misconception is that the on-demand power that is immediately available has already been produced, is ready to go, and is waiting on the other side of the switch. There is voltage on the other side of the switch, but the additional current required for the load is only generated at the moment the switch is closed. There is no storage of electrical energy in the traditional power grid, and it is the generators that provide the current immediately.
In traditional power grids, electrical energy has always been regarded as non-storable energy, and the balance between supply and demand is achieved only through dispatch and control. The current is generated "on demand". There is no stored electrical energy in the grid.
Current-carrying components of traditional power gridsOnly three types are included:
conductors, usually overhead wires and underground cables;
transformers and several other voltage conversion devices;
Switches, circuit breakers, and fuses.
These do not store electrical energy, they transmit electricity over a certain distance, convert voltage up and down, and control the current, but they do not store electrical energy. Explore hardcore knowledge
Therefore, if there is no energy storage in the traditional grid, the energy of electricity entering the grid must be very close. Otherwise, the voltage and frequency will exceed the safety margin, and if the imbalance is not corrected as soon as possible, it will cause voltage and frequency shifts, resulting in damage to the equipment or power outage.
Electricity storage has become a reality
With the development of renewable energy and energy storage technologies, the storage of electrical energy is gradually becoming a reality. Many renewable energy technologies in the modern power system, such as solar and wind, are weather-dependent. In these cases, electrical energy storage can help balance the difference between energy** and demand.
Modern power systems are beginning to use a variety of energy storage technologies to store electrical energy. Technologies such as batteries, energy storage power stations, hydrogen energy storage, and heat storage systems can help balance supply and demand in the grid, improve the utilization of renewable energy, provide backup power, and cope with peak and valley load fluctuations in the grid. With the advancement of technology and the reduction of costs, electric energy storage will play a more important role in the power system of the future.
In this era of dynamism and innovation, electric energy storage will bring us more opportunities and challenges. It will support the large-scale deployment of renewable energy, improve grid stability and flexibility, and drive the clean energy transition.
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