New energy storage predictive maintenance system solution

The European Commission estimates that the grid will require approximately 584 billion euros of investment from 2020 to 2030, including 170 billion euros for digitalization. At the same time, its security issues have become increasingly prominent. Ensuring the safe operation of energy storage systems through modern technology has become an important issue that requires attention in the construction of energy storage systems.

The construction of traditional energy storage systems mainly includes the following parts:

BMS battery management system: The main function of the battery management system is to manage and maintain the charge and discharge of each battery unit, prevent the battery from overcharging or over-discharging, and extend the service life of the battery. The battery management system unit consists of a collection module, a control module and a battery management application. The acquisition module mainly collects parameter data such as voltage, current, and temperature of the battery module and battery cells; the control module controls the charging and discharging of the battery, and the battery management application manages the charging and discharging of the battery and maintains the safety of the charging and discharging of the battery.

PCS energy storage converter: The energy storage converter mainly controls the charging and discharging process of the energy storage system, converts DC to AC, and controls the converter to charge or discharge the battery according to the power command, so as to realize the active power and inactive power of the grid. The regulation of power is the execution unit of the charging and discharging strategy of the energy storage system.

EMS energy management system: The energy management system comprehensively collects information from BMS, PCS and other auxiliary management systems, and implements regulation and integrated energy management for the battery energy storage system, enabling real-time monitoring, diagnosis and warning, panoramic analysis, and advanced control of the energy storage system. and other functions to meet the needs of comprehensive monitoring of energy storage systems, intelligent security analysis, and dynamic panoramic analysis, ensuring the safe, reliable, and stable operation of energy storage systems.

Auxiliary system: The energy storage auxiliary system includes the air conditioning system and the fire protection system. It mainly maintains the operation of the energy storage system in a relatively safe environment, and implements alarms and fire extinguishing when a fire occurs.
Traditional energy storage systems generally adopt a fixed operation strategy and operate off-grid. With the emergence of applications such as smart microgrids and virtual power plants, energy storage systems need to be connected to the Internet and provide interfaces for intelligent dispatching systems to perform scheduling. This requires the introduction of the Internet of Things. The technology realizes the technical upgrade of the energy storage system. The networking of power production systems has strict security requirements and specifications. The network architecture needs to comply with the security specifications of the power production system. It is necessary to add the function of one-way gate penetration on the basis of the Internet of Things.

In addition, although the original EMS system has certain analysis and alarm functions, its design goal focuses on overall system monitoring. System data is generally stored in a structured database, and its ability to support big data storage and analysis is limited. , the ability to expand and integrate other technologies is also relatively weak. In order to realize intelligent operation and maintenance functions such as model optimization, parameter tuning, early warning, and predictable maintenance of the energy storage system, it is necessary to introduce technologies such as big data, artificial intelligence, and deep learning to complete the IoT upgrade of the energy storage system.

The energy storage system data aggregation system needs to provide two-way communication of device connections and messages to ensure data collection and direction control channels. In addition to providing connection services and message channels, the data aggregation service also needs to provide a flexible mechanism to realize the persistence of energy storage system data to database and forward the data to the big data analysis system. In actual application systems, it is also necessary to consider the needs of safe production of the power system, support the gatekeeper and reduce the bandwidth of data passing through the gatekeeper.

We provide an enterprise-level IoT MQTT access platform and IoT EDGE Computing Gateway device, which provides energy storage system connection and two-way decoupled messaging solutions based on MQTT, and has built-in gatekeeper penetration, data encoding, data persistence and data forwarding based on the rule engine. function to realize the aggregation and flexible application of energy storage data.