Siemens Software Powers Up Low-Voltage Grid

In the transition to renewable energy, the rapid proliferation of distributed energy resources and electrification create unique challenges for low-voltage (LV) grids. 

To address these challenges, Siemens has launched its Gridscale X LV Management software, enabling distribution system operators (DSO) to adopt a comprehensive approach to unlocking grid flexibility.

Gridscale X LV Management. Image used courtesy of Siemens

Navigating Grid Challenges

The low-voltage grid refers to the electrical power distribution system’s segment delivering electricity to end-users such as homes, businesses, and small industries. This grid segment operates at relatively low voltages, such as 1 kV, compared to high-voltage transmission lines transporting electricity long distances from power plants to substations.

The modern transition toward renewable energy is now reshaping electricity generation dynamics. Renewable energy sources (RES) are projected to constitute 45-50% of the global power supply by 2030 and 60-70% by 2040. Integrating RES into the grid, especially the LV grid, poses significant challenges.

Renewable energy additions are replacing fossil fuels. Image used courtesy of the Department of Energy

Sources such as solar and wind pose intermittency challenges. Generation fluctuations elevate utility frequency and voltage volatility, necessitating complex balancing services and restructuring coordination processes. 

For example, sudden cloud cover affecting solar generation or changes in wind speed impacting wind power output can cause voltage and frequency deviations and, ultimately, a blackout. This leads to extra time, cost, and maintenance efforts. Without real-time network management at low voltages, the risk of instability rises, threatening reliability standards and causing voltage and frequency inconsistencies and harmonic distortion.

RES integration also requires grid operators to adapt to bidirectional power flows, where energy can be imported and exported, necessitating grid monitoring, control, and protection systems upgrades. DSOs often lack visibility into asset locations and their power production or consumption, rendering it impossible to forecast the LV grid’s behavior.

Empowering DSOs

Gridscale X LV Management software is designed to empower DSOs to tackle flexible LV grid management challenges. By providing observability and control features, this software marks a significant step towards flexibility management, claiming to reduce outages by up to 30%.

The software provides continuous and automated detection, assessment, and action processes to enable DSOs to leverage untapped grid capacity while ensuring reliability. For example, the schematic feature allows operators to visualize the electrical grid sections symbolically, providing a rapid overview of equipment, wiring, and network status within cable cabinets to better guide field crews. 

The flexibility offered by GridScale X LV. Image used courtesy of Siemens

Gridscale X LV Management also includes advanced grid model building capabilities, simplifying the creation and maintenance of a validated and consistent grid model, laying the groundwork for a grid digital twin. A digital twin virtually represents the physical electrical grid and is created using real-time data and advanced modeling techniques. It enables operators to simulate scenarios, optimize operations, and enhance grid reliability and efficiency. Siemens claims such features reduce model maintenance efforts by 50%

Moreover, an intelligent agent guides operators through issue assessment and resolution, while grid stabilization features swiftly address congestion and outages. The software is integrated into Siemens Xcelerator, an open digital business platform. With state-of-the-art cloud architecture and available software as a service (SaaS), it promises deployment within 12 weeks, ensuring efficient digitalization of LV grids.

Unlocking Grid Flexibility

Gridscale X LV aims to promote collaboration among various departments, stakeholders, and systems, eradicating silos and allowing all DSO members access to timely data-driven insights. Ultimately, Siemens hopes the tool will accelerate low-voltage grid operations and improve efficiency as the world transitions toward a net-zero future.