In early November 2014, California-based energy company Southern California Edison announced its decision to enter into a 20-year contract with AES Energy Storage, a manufacturer of battery-powered electric energy storage systems. AES already manages the world's largest commercial battery network, each with 200 megawatt-hour capacity.

The company claims that the total capacity of currently developed batteries around the world is approximately 1 GWh. In this regard, the parent company AES Corporation received $ 16 billion in revenue last year. However, the now planned project will have to surpass all previous facilities ever built by the company.

A huge 400 megawatt-hour battery will be built south of Los Angeles, in Long Beach, at the Alamitos Power Center. It will have to provide peak loads ...

The issues of safe use of electricity continue to become increasingly relevant for the entire population. The requirements of an international electrical company, implemented by regulatory documents in our country, have tightened the rules for the operation of electrical equipment. After that, state standards in force since Soviet times with simplified rules for grounding electrical circuits for residential buildings were revised.

However, a large mass of buildings continues to be operated according to the old TN-C scheme. To re-equip it with the TN-C-S system requires enormous material costs, it is not easy to accomplish all this nationwide. Therefore, such work is carried out gradually, but systematically. The article "Classification of grounding systems of electrical installations" defines electrical circuits for power supply of residential buildings and industrial facilities ...

As you know, in Soviet times, electricity meters of induction type were used to account for the consumed electric energy. Nowadays, these metering devices can be found less and less, electronic metering devices have replaced them. How justified is this transition? To answer this question, we give 10 advantages of electronic energy meters compared to induction.

The first and most significant advantage is a higher accuracy class and, accordingly, a smaller error in the results of measuring the amount of electrical energy consumed.

Previously, in conditions of a relatively low cost of electricity, the accuracy of induction metering devices was quite enough. Now the situation is different. One of the main tasks of power supply companies is to maximize the accuracy of the generated ...

The law of the interaction of electric currents, discovered by Andre Marie Ampere in 1820, laid the foundation for the further development of the science of electricity and magnetism. After 11 years, Michael Faraday experimentally established that a changing magnetic field generated by an electric current is capable of inducing an electric current in another conductor. So the first electric transformer was created.

In 1864, James Clerk Maxwell finally systematized the experimental data of Faraday, giving them the form of exact mathematical equations, thanks to which the basis of classical electrodynamics was created, because these equations described the relationship of the electromagnetic field with electric currents and charges, and the consequence of this should be the existence of electromagnetic waves.In 1888, Heinrich Hertz experimentally confirmed the existence of electromagnetic waves...

An infrared motion sensor is an electronic device capable of responding to changes in the intensity of background thermal radiation in its area of ​​effect. Absolutely any objects possess thermal radiation, and not just a person.

If an object of sufficient size moves at a sufficient speed, crossing the working area of ​​such a sensor, it will trigger, and the sensor will send a signal to the electronic control circuit to perform one or another action by one or another device. Such a device can be either a switch or a dimmer, a burglar alarm, or something else.

Obviously, such an infrared sensor can be used for various automation purposes, both at home and at production and other enterprises and facilities ...

The current rules for the installation of electrical installations impose increased requirements on the reliability of the connection of protective neutral wires and the electrical contacts created by them. In this case, the connection of electrical appliances should be done through a branch, and not a cable.

To understand the difference between these methods, imagine a fruit tree with a grafted branch. Branches that have grown naturally and extend from the trunk can be considered as one with the tree. The term branching is suitable for them, and the scion is created artificially - this is a train. Under a loop in the energy sector, it is customary to consider a piece of wire connected to an electrical wiring to create a specific electrical circuit.

In other words, the PUE requirement can be explained as follows: the zero conductor protector must be intact throughout its entire length, which means a ban not only on its creation ...

Wind energy is actively developing around the world, and it is no secret to anyone that this is one of the most promising areas of alternative energy at the moment. By mid-2014, the total capacity of all installed wind generators in the world was 336 gigawatts, and the largest and most powerful vertical three-bladed Vestas-164 wind generator was installed and launched in early 2014 in Denmark. Its power reaches 8 megawatts, and the span of the blades is 164 meters.

Despite the long-running technology of manufacturing vane turbines and windmills in general, many enthusiasts are striving to improve the technology, increase its efficiency and reduce negative factors. As you know, the wind flow energy utilization coefficient of traditional wind generators in the best case reaches 30%, they are quite noisy and violate natural heat balance of nearby territories...

For more than two centuries, mankind has been using the energy of chemical reactions between various substances to produce direct current.

The redox reaction occurring between substances with the properties of an oxidizing agent and a reducing agent is accompanied by the release of electrons, the movement of which forms an electric current. However, in order to use its energy, it is necessary to create conditions for the passage of electrons through an external circuit; otherwise, it is released by heat from a simple mixture of an oxidizing agent and a reducing agent.

Therefore, all chemical current sources have two electrodes: an anode, on which oxidation takes place, and a cathode, which carries out the reduction of a substance. Electrodes at a distance are placed in a vessel with an electrolyte - a substance that conducts electric current ...