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PCS-8813CPB High voltage directly connected energy storage system
NR's PCS-8813 high-voltage AC direct-mount energy storage system employs modular cascaded multilevel voltage source converter technology. Each phase of ABC three-phase consists of N power units in series, which change the DC voltage of the energy storage battery into AC voltage, and can be directly connected to the high-voltage power grid without a transformer. PCS-8813 integrates the energy storage "4S" integration scheme. The complete system also includes an AC short circuit device, isolation/grounding switch, lightning arrester, current transformer, connecting reactor, charging current limiting resistor, resistance bypass switch, converter, and other primary equipment.
Applicable voltage level: 6-35KV
Unit capacity: 25MW/50MWH
- High integration High efficiency and low losses Safe and reliable Grid friendly
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Integrated with EMS, PCS, BMS
Support industry and electrical standard communication interfaces
Integration arrangement of battery/BMS/PCS and filter
Standard storage container for primary AC output, separate cooling and fire protection system
Cascaded multi-level topology, low IGBT switching losses
PCS efficiency > 98%
Maximum system efficiency > 90%
Multi-level SOC balancing control, high uniformity
No parallel connection of battery clusters , no circulating current , small short-circuit current
>10% redundancy design, fast isolation of single module fault
High uniformity of liquid-cooled battery (temperature difference ＜3℃)
Directly integrated into the high-voltage grid, better transient grid support
Integrated with synchronous condenser function, simultaneous support frequency and voltage
Fast response, less than 5ms
Single unit with large capacity, avoid parallel connection of multiple small PCSs, superior transient coordination performance