
Recommendation ITU-T L.1221 is a subpart (Part 2: Battery), of a series of Recommendations (the other Recommendations in the series being Recommendation ITU-T L.1220 and Recommendation ITU-T L.1222) on innovative energy storage systems for stationary power systems of telecom/information and communication technology (ICT) equipment used in telecom networks, data centres and customer premises equipment (CPE). [pdf]

The definition of mobile substation or portable substation is a completely self-contained trailer-mounted substation consisting of a transformer, cooling equipment, high voltage switchgear, and low voltage switchgear along with metering, protection relaying devices, AC and DC auxiliary power supply, surge protection, and cable connecting arrangement. [pdf]
Industrial power supply systems: Mobile substations can provide a reliable and secure power supply for industrial plants that require high power quality, availability, and efficiency. They can also provide backup power or load sharing for critical processes, such as oil and gas production, mining operations, chemical plants, etc.
They are pivotal in ensuring a reliable power supply during emergencies, maintenance, or in remote areas. By housing all necessary components within a portable framework, mobile substations offer flexibility, cost-effectiveness, and rapid deployment, making them ideal for a range of applications, from disaster recovery to temporary power support.
Cable connecting system: The cable connecting system is the component of a mobile substation that connects the mobile substation to the power source and the load using flexible cables and connectors. The cable connecting system has to be designed to provide easy and secure connection and disconnection of the cables.
Temporary mobile substations are deployed when there is a planned interruption or maintenance of existing substations, or when new construction or power upgrades are underway. These substations prevent service interruptions by taking over the role of the permanent substation for a specific time frame.
Metering system: The metering system is the component of a mobile substation that measures and records the electrical parameters of the power flow, such as voltage, current, power, frequency, etc. The metering system has to be designed to provide accurate and reliable data for monitoring and billing purposes.
The switchgear enables the routing of electricity within the substation and allows isolation of faults without affecting the entire system. Modular switchgear solutions in mobile substations support multiple configurations, ensuring compatibility with varying power systems.

The Minister of Economic Affairs and Development, Mr. Abdallah Cheikh-Sidia, and the French Minister Delegate for Foreign Trade and Investment Attractiveness, Nicolas Forissier, signed a concessional loan agreement on Tuesday in Nouakchott to finance the construction of 10 solar power stations equipped with storage units, for an amount of €39,223,671, equivalent to (1,817,000,000) new ouguiyas. [pdf]

To sum up, the home energy storage power supply has many advantages such as energy storage, energy saving and environmental protection, efficient and convenient, and emergency rescue, but it also has disadvantages such as high initial investment cost, maintenance and maintenance costs, weight and volume restrictions, and limited service life and safety risks. [pdf]
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