Distribution Area Energy Storage Voltage Governance Solution
Summary: Eliminate high/low voltage at rural line ends and three-phase imbalance, improve voltage compliance rate, and accelerate local PV consumption.
Solution Overview
To address voltage limit violations, three-phase imbalance and low voltage at the ends of rural and suburban distribution areas, grid-connected energy storage is used for active voltage governance.
Key Points
- Energy storage governs line-end voltage and three-phase imbalance
- Second-level active and reactive power support, no new lines required
- PV can be fully connected to the grid after governance
- Improves the voltage compliance rate of the distribution area
Applicable Scenarios and Challenges
Long line ends and dispersed loads, with high/low voltage and three-phase imbalance, cause equipment shutdown, PV curtailment and damage to household appliances.
VGRID System Composition
- Power Conversion System (PCS): As a grid-connected converter, it rapidly absorbs/delivers reactive and active power to regulate node voltage.
- Static Transfer Switch (STS): Provides protection and switching at the grid-connection point, isolating the system during maintenance.
- Battery Energy Storage System (BESS): Provides active power support and short-term power buffering to smooth fluctuations.
- Energy Management System (EMS): Controls charging and discharging according to voltage thresholds and three-phase imbalance rate strategies.
- Microgrid AC Cabinet (MPS): Distribution-area-level AC cabinet integrating metering and protection.
Core Value
- Significant improvement in voltage compliance rate
- Improved three-phase imbalance, reducing line losses and equipment damage
- Releases distribution transformer and line capacity, accelerating PV integration
- No large-scale line renovation required, fast deployment
Typical Applications
Suitable for rural distribution areas, suburban line ends and areas with concentrated distributed PV integration.
Delivery and Support
VGID POWER (VGRID) provides integrated delivery from site assessment, system design and manufacturing of core equipment (PCS/STS/BESS/MPS) to commissioning and remote O&M. Please contact us for customized solutions and quotations.
FAQ
How does energy storage voltage management differ from traditional voltage regulation?
Energy storage can provide both active and reactive power support with second-level response, without building new lines or replacing transformers with larger ones.
Will it affect the existing PV grid connection?
On the contrary, once voltage is managed and within limits, PV can connect to the grid at full capacity and curtailment is reduced.
Where is distribution-area energy storage typically installed?
Near the distribution transformer on the side where end-of-line voltage exceeds limits, where local support is fastest.
What about the investment and returns?
Lower cost than building new lines or replacing transformers, with payback from reduced line losses and higher PV revenue.
