Leveraging comprehensive experience and solutions, NR Electric offers a sophisticated interconnection solution for grid-scale Battery Energy Storage System (BESS). NR Electric’s Power Conversion System (PCS) solution includes advanced converter/inverter technology and comprehensive control, protection and management system to ensure the safety, reliability and flexibility of your BESS. It can reduce power supply cost, improve power system stability, regulate grid frequency and compensate load fluctuation, etc. NR Electric’s PCS, with various battery technologies, is flexible to provide a wide range of functionalities asked by the smart grid.
Accurate and flexible charging & discharging control
The PCS-9567 power conversion system communicates with battery management system in real-time and monitors the current operation information of batteries. It controls the charging & discharging status of converter and switches charging & discharging modes between “constant current”, “constant voltage” or “constant power”. The power conversion system supports multiple types of energy storage elements.
Flexible switchover between grid-connected operation mode and isolated grid operation mode
The Power conversion system can flexibly realize bidirectional energy exchanges in the grid-connected operation mode, or be used as the main power source in the isolated grid operation mode.
Soft grid-connected control and electric energy quality control
On the basis of online monitoring grid voltage information, the control system of PCS can accurately control the output voltage of converter in real-time and eliminate static and dynamic errors to realize non-impact grid connection. In addition, the control system has online harmonic monitoring function and independent harmonic analysis software module to optimize the control of power conversion and ensure electric energy quality.
Respond to MEMS commands for peak load shifting
With the Micro-Grid Energy Management System (MEMS), it can store electric energy at power consumption valley and release electric energy at power consumption peak, realizing peak load shifting.
Grid frequency and grid reactive power control
In grid-connected operation, the power conversion system can realize primary frequency and secondary frequency regulation of power grid by coordinating with AGC (Automatic Generation Control); and can realize grid static reactive power control by coordinating with AVC (Automatic Voltage Control).
Complete self-check and protection functions
The scope of self-check covers the control system, I/O unit, converter power module, etc. And it can ensure that the period of detecting the internal system fault is less than 1ms and the corresponding operation commands are issued, such as blocking trigger pulse or tripping signal. Complete protection functions are provided to ensure the normal operation of the converter.
Transient fault recording functions
The system can continuously record fault signals from pre-fault to post-fault. The recorded data is stored in the sharing directory of the operator workstation and can be used in fault analysis.
TUV and UL certified power conversion system with multiple operating mode.
Reliable protection functions to ensure safe operation of products.
Fast response to MEMS command and initiative participation in grid peak regulation.
Multiple communication interfaces such as CAN, RS485 and Ethernet.
Complete self-check and protection functions.