Energy Storage Solutions: How Batteries Can Help You Save On Electricity Costs In Montpellier – In general, solar energy storage systems are designed according to four systems: (1) photovoltaic power generation systems; (2) Energy storage systems; (3) Intelligent power distribution systems; (4) Energy management systems. And in this article, let’s deal with energy storage systems. The energy storage system consists of a lithium-ion phosphate battery and a PCS energy storage converter. It should be based on the total capacity of the load and the operating characteristics of the users’ load. In order to facilitate transportation and installation and reduce the area, the design of the energy storage system is based on the energy storage technology of lithium iron phosphate battery, which actually consumes electricity and the energy storage system, and the full energy efficiency of the storage system should be considered. How to build solar energy storage systems? The energy storage system is mainly composed of lithium iron phosphate battery, DC bus unit, battery management system (BMS), energy storage converter (including isolation transformer) (PCS), container body (including power distribution), power management system ( EMS). ), monitoring system, automatic fire control system and temperature control system, etc. 5 Part of the energy storage system

It is a battery energy storage system that uses a modular integrated design from the cell to the battery array. The battery management system uses a 3-level BMS management system. And it provides highly reliable battery balance mode, security management mode, temperature management mode and provides rich monitoring projects. (Lithium batteries are currently mainly used). You can directly cooperate with lithium battery manufacturers to develop battery PACK solution)

Energy Storage Solutions: How Batteries Can Help You Save On Electricity Costs In Montpellier

Energy Storage Solutions: How Batteries Can Help You Save On Electricity Costs In Montpellier

It uses advanced power supplies and advanced digital control technology to optimize control performance and improve system reliability. It is suitable for different battery charging and discharging needs and has a modular structure, which is convenient for installation and maintenance. It also has two-way inverter, battery charging and discharging function and perfect display and communication function.

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Including the box and internal auxiliary functions, the general supporting structure of the internal rack, heat dissipation structure, lighting function, heat insulation function, dustproof, waterproof, pest protection, IP54 protection class compliance, with access control function, which can meet the application of the whole battery system in the drives energy and various complex environments.

An automatic fire extinguishing system with heptafluoropropane as the main material is installed with an automatic alarm device. Once a fire is detected, the electrical connection between the container and the external equipment can be disconnected in time. At the same time, the fire extinguishing device is activated, and the alarm information is downloaded to the rear monitoring system, which has a connection function.

The container uses air conditioning, cooling and heating modes, air duct construction, accurate air supply to the battery and maintaining the stability of the temperature of the whole system. At the same time, the battery has a temperature control mode.

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As shown in the figure above, the ESS consists of 9 cell clusters as one step, followed by 1 500kW set. A pre-charge circuit is installed in the battery packs to ensure the safety of the system.

The communication management unit in the system cabinet of the energy storage management system includes Ethernet fiber switch, BAU, ECS and other equipment.

ECS communicates with the monitoring background of the main control room through a switch. And the communication protocol is IEC 61850 or Modbus TCP.

Energy Storage Solutions: How Batteries Can Help You Save On Electricity Costs In Montpellier

The ECS energy store is used to coordinate and control the internal system and unify protocol standards. It uses a mature real-time operating system and is equipped with a high-speed field bus to ensure the safe and stable operation of the energy storage system.

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Ambient temperature and humidity monitoring, a smoke sensor and a water immersion sensor in the container are collected and connected to the security monitoring system using the TCP / IP protocol via an Ethernet port.

Moreover, the camera in the container is connected to the CCTV host in the main control room via a network cable.

Secondary electricity ESS mainly controls electricity and power supply. Both will be powered by an independent low-voltage AC switchboard.

There are many design requirements for an energy storage container. It is necessary to ensure the operation of the lithium-iron-phosphate battery at the nominal operating temperature and to extend the service life of the energy storage. At the same time, the sensor probe, fire alarm and fire alarm system, temperature control system (equipped with industrial precision air conditioning), frequency visual monitoring system, temperature and humidity monitoring and other equipment must be configured to ensure the safe operation of the energy storage system and the realization of long-term process monitoring goals.

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1) This layout of energy storage system equipment is a preliminary design plan. After the project is finally implemented, the final construction drawings as the specification of the entire project.

2) The container should use some rockwool to create an airtight storage space for the battery to improve the management of battery heat radiation.

The battery system consists in assembling a battery with a certain amount of electricity due to a certain sequence and parallelism.

Energy Storage Solutions: How Batteries Can Help You Save On Electricity Costs In Montpellier

5) The battery management system (BPU) is integrated into the high voltage battery box. It is equipped with a common positive contactor, a common negative contactor, a pre-charge circuit and a fan cooling circuit. All contactors must be capable of receiving control from the battery management system.

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The battery management system collects key data such as single voltage, temperature, battery terminal voltage, current, and SOC, and features overcharge, overdischarge, and short circuit protection.

In order to prevent the battery from being overcharged and discharged, and to extend the battery life by monitoring the battery condition, and to realize the control of battery charging and discharging, and to ensure stable and reliable operation, the system should be equipped with a BMS. In addition, the protection hardware should be equipped with relays, circuit breakers and fuses, etc. In addition, the balanced control and temperature control technology ensures the stability, life and safety of the battery pack, and ensures the safe and reliable operation of the ESS.

The protection and monitoring functions of the battery system are implemented by the BMS battery management system. The design of the battery management system (BMS) is divided into a three-layer architecture of BMU (layer 1), BPU (layer 2) and BAU (layer). 3). The main functions of each BMS level are as follows:

1) The BMU is mainly responsible for collecting real-time information such as the voltage and temperature of the battery modules. At the same time, automatic control of charge and discharge balance, online detection, fault diagnosis.

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2) The BPU is responsible for managing the battery, exchanging data with the BMU cluster, collecting the operating information of the entire battery, and alarming and protecting against faults in the battery. At the same time, SOC calculation, isolation detection and battery relay alignment strategy analysis are performed, showing device adhesion detection, PCS data communication with this cluster, related to relay control and human machine interaction through this touch screen cluster (HMI) . .

3)BAU is mainly responsible for data exchange with BPU, real-time monitoring and scheduling of battery status of each cluster. And transfer the data to the PC over the network while accepting the PC instructions and sending them to the execution unit.

Including real-time battery voltage detection, battery charge and discharge current detection, single battery terminal voltage detection, multi-point battery temperature detection, battery leakage monitoring and other parameters, as well as a single calculation of real-time SOC and SOH value of the cell and overall battery cluster.

Energy Storage Solutions: How Batteries Can Help You Save On Electricity Costs In Montpellier

Battery System Over Voltage Alarm, Battery System Low Voltage Alarm, Battery System Over Current Alarm, Battery System High Temperature Alarm, Battery System Low Temperature Alarm, Battery System Leakage Alarm, Battery Management System Abnormal Communication Alarm When Battery Internal System Abnormal Alarm control and other status, it can display and report alarm information, notify PCS and background monitoring system, and change system operation strategy in time.

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When the battery management system is working, if the voltage, current, temperature and other analog values ​​of the battery exceed the safety protection threshold, the battery management system can achieve local fault isolation and shut down the problem battery cluster, and then report the protection information to the same time and continue locally.

This BMS has a self-diagnosis function. When the communication between the battery management system and the outside world is interrupted or the internal communication with the battery management system is abnormal. This can be reported to the monitoring system. In addition, it also has failures due to other anomalies such as analog data acquisition anomalies. Functions of self-diagnosis system, local display and on-site reporting.

The parameters can be changed in the BMS or monitoring system of the energy storage power plant through local and remote ways, and have a password authentication function to show the local parameter changes. The battery management system provides a communication protocol and command format for changing parameters. The parameter setting items include: upper limit of single battery charging voltage, lower limit of single battery charging voltage, maximum battery operating temperature, minimum battery operating temperature, battery string current exceeding threshold, battery string short-term temperature rise threshold, and local operation status display function.

The BMS can display different operating states

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