Energy Storage Solution

Battery Energy Storage System (BESS) Solution

Transformer solutions for grid-scale and C&I battery storage — PCS-adapted, bi-directional, harmonic-tolerant. From PCS step-up to grid connection, with containerized options.

Bi-directional DutyPCS-adapted DesignContainerized Options
Core Capability

PCS Adaptation & Bi-directional Operation

Engineered around the inverter — every unit is matched to the PCS it serves, not the other way round.

PCS Matching

PCS-to-Transformer Interface

Transformers matched to PCS output characteristics: voltage, current, harmonic spectrum, and switching frequency.

Bi-directional

Charge & Discharge

Bi-directional power flow design — transformer handles both charging and discharging cycles without derating.

Cyclic

Cyclic Loading Design

Thermal design optimized for cyclic loading patterns typical of BESS operation, ensuring insulation longevity.

Engineering Data

Key Technical Parameters

Standard design envelope — every project is then tuned to site and PCS data.

Capacity100–3150 kVA per unit; parallel operation for larger systems
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Voltage0.4/0.69kV (PCS) → 10/20/35kV (grid); main step-up 35→110/220kV
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HarmonicsK-factor rated for PCS switching harmonics; eddy-current loss controlled
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Temperature riseDesigned for cyclic thermal loading; F/B insulation class
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EfficiencyLow no-load + load loss for maximum round-trip efficiency
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ProtectionIP54 outdoor; containerized option with integrated cooling
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MonitoringRemote monitoring interface — temperature, DGA, OLTC position (optional)
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Step-up stationIntegrated BESS step-up station: transformer + PCS interface + switchgear
System & Equipment View

See how the solution fits together

A focused system view and one relevant equipment detail—without repeating the Hero image.

HUACHEN battery energy storage PCS transformer protection and grid coordination diagram
System Design Drawing

Energy Storage System Coordination

Coordinated relationship between battery system, PCS, transformer, protection and grid connection.

HUACHEN battery energy storage transformer interface details
Equipment Detail

Bi-directional transformer interface

Terminals, cooling and monitoring details adapted to cyclic operation between the PCS and utility grid.

Recommended Configuration

BESS Transformer and Station Options

Choose a proven starting point, then let our engineers adapt voltage, capacity, impedance, cooling, enclosure and documentation to the project.

Key design factors

  • Bi-directional cycling and harmonic loading
  • PCS voltage window and overload profile
  • Fire separation, enclosure and monitoring scope

What to send us

  • BESS MW/MWh and PCS data
  • Grid connection voltage
  • Installation layout and auxiliary loads

Have a BESS project?

Send us your PCS specs, system capacity, and site conditions. We’ll propose the right transformer and step-up station configuration.

Request BESS Solution
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