
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 auction held by Polskie Sieci Elektroenergetyczne S.A. (PSE – an electricity transmission system operator in Poland and the sole operator of the country's high-voltage transmission lines, 100 percent owned by the State Treasury) on December 12, 2024, ended in the seventh Dutch auction round with a strike price of PLN 264.90/kW/year for Polish physical units and 247.87 PLN/kW/year for foreign physical units in the synchronous profile zone. [pdf]

In one of the most sweeping economic reform packages in recent memory, the Government of Ghana has unveiled a transformational policy agenda backed by over GH¢22 billion in targeted investments to reshape the nation's energy architecture, unlock new value from its gold resources, and mount an aggressive defence of its lands and waterways from environmental destruction. [pdf]

IRENA is tracking the current costs and performance of BESS and is monitoring how the value of these systems in different applications and international markets is likely to evolve over time with increasing self-consumption of rooftop solar PV, the provision of grid services such as frequency regulation or ramping needs, as well as peak power demand shaving in industry and alike. [pdf]
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