Grid phase balancing for Distribution System Operators

Automated correction of voltage imbalances across all three phases, protecting network stability for residential and industrial consumers alike.

3-Phase

Real-time balancing across all phases

100%

Autonomous correction, no manual input

✓ SG

Synergrid-certified components

The challenge

Why phase imbalance is a growing problem for DSOs

Belgium's distribution networks were built for a world of predictable, centralized power flows. That world no longer exists. Solar PV capacity in Belgium has tripled since 2015, reaching more than 11 GW by end of 2025, the vast majority of which is installed as single-phase residential systems, injecting power back into low-voltage feeders in an inherently unbalanced way. Meanwhile, the accelerating adoption of electric vehicles is adding high-power, phase-specific charging loads that can shift within seconds.

Solar electricity production alone fluctuates between 255 GWh and 1,405 GWh per month, creating injection patterns on the distribution grid that vary dramatically by season, time of day — and by phase. Combined with the growing electrification of heating, these new consumption and production profiles are pushing low-voltage networks well beyond the balanced, stable conditions they were designed for.

For Distribution System Operators such as Fluvius, Ores, and RESA, the consequence is concrete: maintaining the balance between supply and demand on the network is a permanent operational requirement — any sustained imbalance risks destabilizing the entire network. At the distribution level, phase imbalance is a direct expression of this challenge — one that grows with every new EV charger or rooftop solar panel connected to the grid, and one that Synergrid's connection rules require DSOs to actively manage.

EV charging proliferation

High-power chargers create sudden, uneven load spikes across phases on residential and commercial feeders.
Distributed solar injection

Single-phase solar systems inject power back into the grid unevenly, amplifying existing imbalances during daylight hours.
Regulatory pressure

Grid codes increasingly require DSOs to maintain phase voltage within tight tolerance bands, raising the stakes for non-compliance.

Alpha Innovations Solution

The Power & Control cabinet : three pillars of grid stability

Alpha Innovations' Power & Control cabinet is a fully integrated system that detects, absorbs, and corrects phase imbalances in real time without any manual intervention.

Inter-phase energy transfer

Excess energy from overloaded phases is captured and seamlessly redirected to underloaded ones, maintaining uniform load distribution across all three phases at all times.
Temporary storage & restitution

An integrated energy buffer absorbs transient power surges and releases stored energy on demand, dampening voltage fluctuations and preventing grid disconnection events.
Continuous real-time monitoring

Voltage and current are sensed across all phases continuously. Any imbalance is detected and corrected autonomously with full visibility in InviewMESH.

How it works

From imbalance detection to automatic correction

The system operates as a closed-loop control architecture, continuously sensing, deciding, and acting without human intervention.

Real-time sensing across all three phases

Voltage and current sensors continuously measure the state of each phase. Any deviation from the target balance is detected immediately and passed to the control logic.
Control decision: energy buffering

The embedded control system analyses the imbalance in real time and determines the optimal corrective action by redistributing energy between phases.
Bidirectional power conversion

The CE+T Sierra 25 bidirectional converter executes the power flow — injecting or absorbing energy on the target phase within milliseconds, Synergrid-certified for Belgian grid compliance.
Monitoring & remote oversight

All system data : phase voltages, current and power flows, is available in real time via the Inview X touchscreen and in Inview MESH cloud pltaform. It can also be integrated into the DSO's management platform.

Key Benefits

Measurable outcomes for DSOs

Designed for the operational realities of modern distribution networks.

✓ Prevents consumer disconnection

Eliminates the voltage drops and overvoltages that trigger protection relays and cut supply to residential and industrial end-users.

✓ Fully autonomous operation

No manual intervention required. The system detects and corrects imbalances automatically, reducing operational burden on DSO field teams.

✓ Grid code compliance

Synergrid-certified components ensure the solution meets Belgian distribution grid connection requirements.

✓ Scalable & integrable

The supervision solution integrates with existing management pltaform and can be deployed across multiple substations or feeder points as the network evolves.

✓ Future-proof for the energy transition

Designed to handle the growing proliferation of EVs, distributed generation, and prosumers, assets that will continue to increase phase imbalance pressure.

✓ Full lifecycle support

Alpha Innovations accompanies DSOs from feasibility study through co-design, manufacturing, testing, commissioning, and long-term maintenance.

FAQ

Grid phase balancing is the process of redistributing electrical load evenly across the three phases of a distribution network. For Distribution System Operators, phase imbalance causes voltage fluctuations that can disconnect residential and industrial consumers, damage equipment, and trigger non-compliance penalties. Automated balancing solutions ensure stable, continuous power delivery without manual intervention.

The cabinet operates as a closed-loop control system. It continuously measures voltage and current across all three phases, detects any imbalance, and automatically performs inter-phase energy transfers and/or energy buffer charge/discharge operations to restore balance, with no human intervention required.

Yes. The Power & Control cabinet integrates CE+T's Sierra 25 bidirectional converter, which is Synergrid-certified, ensuring full compliance with Belgian distribution grid connection standards. The cabinet also includes a Synergrid-compliant decoupling system for safe management of energy flows between the grid and local sources.

Yes. Data can be structured and integrated into the DSO's existing SCADA, EMS, or asset management platforms via open API in Inview MESH platform.

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