Energy Storage EMS

1.Definition

Energy Storage EMS is a system that integrates data acquisition, analysis, control, and optimization functions to manage energy storage devices and achieve efficient energy management.

Its core goal is to improve the operational efficiency of the energy storage system, reduce operational costs, and ensure the safety and reliability of the system through real-time monitoring, data analysis, intelligent control, and optimized scheduling.

The composition of the energy storage EMS system is generally divided into the equipment layer, communication layer, information layer, and application layer, covering comprehensive management from energy collection and transformation to visual monitoring and operational interfaces.

2.Functions

The energy storage EMS has the following key functions:

Monitoring and Control

The energy storage EMS can monitor the operation status of the energy storage system in real-time, precisely control the charging and discharging status, temperature, voltage, current, and other key parameters of the battery.

By closely cooperating with the energy storage converter (PCS), it achieves effective control of charging and discharging operations, ensuring that the battery is always in the best working condition.

Optimized Scheduling

The energy storage EMS optimizes the charging and discharging strategies of the energy storage system based on multiple factors such as grid demand, battery status, and cost.

During peak grid demand, the EMS will reasonably schedule the energy storage system to discharge to meet the grid load demand and reduce peak load; during low grid demand, the EMS will arrange for the energy storage system to charge, storing excess electrical energy and improving energy utilization efficiency, thereby reducing operational costs.

State Estimation and Performance Assessment

The energy storage EMS uses advanced algorithms to accurately estimate the state of the battery. It can precisely calculate the remaining capacity of the battery, providing users with information on the available energy of the current energy storage system, which facilitates reasonable energy usage planning.

At the same time, the EMS can assess the health of the battery, analyzing various performance indicators of the battery to determine its aging condition and potential failure risks.

Safety Management

The energy storage EMS includes a series of safety protection measures to ensure the safe operation of the energy storage system.

The over-temperature protection function automatically activates when the battery temperature is too high, preventing safety accidents due to overheating. Overcharge protection and over-discharge protection can effectively prevent excessive charging or discharging of the battery, extending battery life and reducing safety risks.

3.Wide Applications

Grid Ancillary Services

The energy storage EMS plays an important role in grid ancillary services. It can regulate the frequency and voltage of the grid, provide backup power for the grid, and participate in frequency regulation and demand response and other ancillary services.

Renewable Energy Integration

The energy storage EMS helps integrate renewable energies such as wind and solar power. Due to the intermittency and instability of wind and solar energy, storing excess energy through the energy storage system and releasing it during peak demand can improve the utilization rate of renewable energy.

Peak Shaving and Valley Filling

In the electricity market, the energy storage EMS can help grid operators achieve peak shaving and valley filling. During off-peak periods, when grid load is low and electricity prices are relatively low, the EMS will arrange for the energy storage system to charge and store excess electrical energy. During peak periods, when grid load increases and electricity prices rise, the EMS controls the energy storage system to discharge, balancing the grid load, reducing peak load, and minimizing energy waste.

Demand Response

The energy storage EMS can respond to the grid’s demand reduction signals and participate in demand response programs to reduce electricity costs. When the grid load is too high, the EMS helps reduce the grid load by reducing the charging of the energy storage system or increasing discharge.

Microgrid Management

In microgrid applications, the energy storage EMS can manage various energy resources, achieving optimized allocation and autonomous management of energy.

Electric Vehicle Charging Control

The energy storage EMS can manage electric vehicle charging stations, optimize grid loads, and ensure the charging needs of electric vehicles.