With the continuous development of large-scale energy storage power stations, energy storage power stations with capacities ranging from tens of megawatts to even larger scales have emerged. Typically, these large-scale energy storage power stations are equipped with dozens or even hundreds of energy storage converters (PCS). When numerous battery packs and PCS units are deployed simultaneously within the same energy storage power station, coordination and control challenges arise. Therefore, a centralized control system is needed to coordinate and manage all the PCS units in a unified manner. Such a system not only improves and enhances the overall performance of the energy storage power station—particularly its transient performance—but also ensures that the charging and discharging characteristics of each PCS and battery pack are balanced and optimized.

Keyword: RE-795 Coordination Controller

With the continuous development of large-scale energy storage power stations, energy storage power stations with capacities ranging from tens of megawatts to even larger scales have emerged. In such large-scale energy storage power stations, the number of energy storage converters (PCS) typically reaches dozens or even hundreds. When numerous battery packs and PCS units are deployed simultaneously within the same energy storage power station, coordination and control challenges arise. Therefore, a centralized control system is needed to coordinate and manage all the PCS units in a unified manner. This not only improves and enhances the overall performance of the energy storage power station—particularly its transient performance—but also ensures that the charging and discharging characteristics of each PCS and battery pack are balanced and optimized.

 

Main features:

① Adopting the design concept of an embedded real-time operating system for relay protection, using dedicated, standalone equipment with a fanless and hard-disk-free design.

② Equipped with a fiber-optic communication interface, it can directly connect to the control network via fiber optic cable and use GOOSE to achieve rapid optical-path communication and control between the control system and the PCS.

③ A single coordinated controller supports the control requirements of up to 128 PCS units. When the number of connected units exceeds the capacity of a single controller, a hierarchical control architecture can be adopted.

④ Equipped with the capability to directly acquire electrical parameters such as current, voltage, and frequency at energy storage grid connection points, meeting the high-precision and high-speed sampling and control requirements for coordinated control. The frequency detection accuracy error shall not exceed 0.002 Hz, and the system supports data acquisition from up to four energy storage grid connection points.

 

Key application features:

Active Power Tracking

Project Management

Stabilize fluctuations

Primary frequency regulation (active support function)

Inertia response (active support function)

Damping control (active support function)

Rapid pressure regulation (active support function)

AGC/AVC Power Control

Zone Control

Emergency discharge control function

System peak shaving

Anomaly monitoring triggers the adjustment function.

Locking and regulating function

Peak shaving and valley filling

Source-Grid-Load Control Function

SOC automatic maintenance and economic operation functions, etc.

 

Application scenarios:

New energy supporting energy storage power stations

Grid-side grid-forming energy storage power station

Medium- and large-scale user-side energy storage power stations

Grid-side independent/shared energy storage power stations

Schematic diagram of an energy storage power station system with a coordination controller: Currently, our company’s single energy storage coordination controller supports connecting up to 128 PCS units. It communicates with PCS devices via communication protocols including IEC61850-MMS, IEC61850-GOOSE, IEC104, and Modbus, and also supports both single-network and dual-network networking configurations.

Schematic diagram of a hierarchical architecture coordinated control system: For ultra-large-scale energy storage power stations, when the number of converters exceeds the capacity that a single coordinated controller can handle, a hierarchical architecture control mechanism can be adopted.

 

Schematic diagram of an energy storage power station system with a coordinated controller

 

 

For ultra-large-scale energy storage power stations, when the number of converters exceeds the capacity that a single coordinated controller can handle, a hierarchical architecture control mechanism can be adopted.

 

Schematic Diagram of a Hierarchical Architecture Coordination Controller System

 

Product Qualifications