The Power Conversion System (PCS), often regarded as the brain and muscle of a Battery Energy Storage System (BESS), performs a wide range of critical operational functions tailored to meet end-user requirements. These include bidirectional power conversion, grid interconnection and synchronization, voltage and frequency regulation, active and reactive power control, integration with the Battery Management System (BMS), support for ancillary services, and protection and fault handling. 

Responding to the growing global demand for commercial and industrial (C&I) and utility-scale energy storage applications, GoodWe, a leading provider of PV inverters and BESS solutions, recently introduced its latest C&I and utility-scale PCS systems, along with a utility-scale ICS boost converter model, at the International Energy Storage Exhibition. 

C&I Storage Application 

For C&I energy storage cabinet applications, GoodWe’s new 125 kW energy storage PCS is compatible with battery banks using cells ranging from 280 Ah to 320 Ah in capacity. It supports a DC operating voltage range of 670 V to 1,000 V, allowing it to meet various power requirements. 

Notably, in harsh industrial or commercial environments with ambient temperatures of up to 40°C, the PCS supports 1.1 times overload operation – up to 137.5 kW – for as long as 2 hours, by fully discharging a 261 kWh integrated energy storage system. 

GoodWe highlights the unit’s strong adaptability to power grids with high harmonic content and severe imbalances, which ensures reliable and hassle-free operation for C&I end-users. The company says the system can independently manage active and reactive power compensation even in industrial parks with unbalanced loads, enabling power quality optimization and delivering tangible economic benefits. 

Importantly, its off-grid mode ensures a stable and balanced power supply during grid outages by supporting unbalanced and half-wave loads, without the need for additional isolation transformers. 

To withstand harsh industrial environments, the PCS cabinet features IP66 ingress protection and anti-corrosion ratings of C4/C5. Designed for complex operational scenarios, it meets Class B electromagnetic compatibility (EMC) standards, maintains an operating noise level below 65 dB, and incorporates an intelligent thermal management system to ensure efficient performance with low energy consumption. 

With plug-and-play AC and DC terminal designs, the PCS offers flexibility and quick integration into a wide variety of C&I cabinet solutions. It supports key applications such as peak shaving, valley filling, demand management, backup power, self-generation, and self-consumption. 

Utility-Scale Storage Operation 

For utility-scale applications, GoodWe has introduced a 215 kW PCS that supports a wide range of grid services and operational needs. This solution is equipped for primary frequency modulation and offers blackstart capability to quickly restore power following grid failures. 

To enhance grid stability, the PCS features both Static Var Compensator (SVG) and Virtual Synchronous Generator (VSG) functions for active and reactive power compensation. Additionally, it supports high and low voltage ride-through capabilities, making it suitable for complex and fluctuating grid environments, particularly during large-scale integration of renewable energy. 

According to GoodWe, the system is scalable up to 5 MW, with the ability to connect up to 24 units in parallel, and can operate without derating in high-temperature conditions of up to 45°C. 

ICS Boost Converter 

Designed for extreme environmental conditions, such as large-scale solar and wind installations on plateaus or in desert regions, GoodWe’s ICS step-up converter supports DC-side voltage up to 1,500 V and delivers a maximum efficiency of 98%. 

To ensure reliable long-term performance, the converter features an intelligent temperature control algorithm and supports 1.1 times the long-term overload capacity. It remains stable and efficient in a wide temperature range from -40°C to +60°C, and at altitudes up to 4,000 meters above sea level, according to the company.