News

Description of lifepo4 battery in energy storage

2019-04-11 10:03:37 0

The lifepo4 battery energy storage system can be used as a buffer between various power sources and stable power demand, and can increase the power generation capacity of unstable power sources such as wind energy and solar energy. The wind power system causes the output power to oscillate due to the change of the wind speed, and the energy storage system can provide stability and reactive power compensation for the fan output through the characteristics of fast response speed and almost equal charge and discharge cycle. At the same time, the energy storage system can regulate the voltage and control the system frequency in an off-grid power generation system.

In the economic sense, the direct consequence of uncertain power output is the decline in customer willingness to pay or the resulting reduction in capital credit. Configuring the energy storage system for wind turbines will provide volatility and provide a stable power output to the grid, which will increase the price of electricity generated by wind power.

lifepo4 battery system components

Control System

The lifepo4 battery energy storage system is controlled by a programmable logic controller (PLC) and a human machine interface (HMI). One of the key functions of the PLC system is to control the charging time and rate of the energy storage system. For example, the PLC can receive real time data of the price of electricity, and decide how to quickly recharge the battery system based on the maximum allowable power demand, state of charge, and price comparison during peak/off-peak hours. This decision is dynamic and can be optimized on a case-by-case basis. It is integrated with the rest of the system through standardized communication inputs, control signals and power supplies. It can be accessed via dial-up or the Internet. It has multiple layers of defense to limit access to its different functions and provides customized reporting and alerting capabilities for remote monitoring.

Power Conversion System (PCS)

The function of the power conversion system is to charge and discharge the battery and provide improved power quality, voltage support and frequency control for the local grid. It has a complex, fast-moving, multi-quadrant, dynamic controller (DSP) with dedicated control algorithms that can convert the output over the entire range of the device, that is, cyclically from full power to full power output. It works well for any combination of reactive power and active and reactive power.

lifepo4 batterystack

The stack is made up of several single cells. The lifepo4 battery energy storage system can economically store and provide large-scale power on demand, and the main mode is fixed. It is a long-life, low-maintenance, high-efficiency technology that supports the infinite expansion of power and energy storage capacity. Energy storage systems are particularly effective for renewable energy suppliers, grid companies and end users.

The lifepo4 battery energy storage system can be applied to all aspects of the power supply value chain, and can convert intermittent renewable energy power such as wind energy and solar energy into stable power output; and optimize the power supply in remote areas;

The deferral of fixed investment in the grid and the application of peak shaving. The energy storage system can also be used as a backup power source for substations and communication base stations. The lifepo4 battery energy storage system is environmentally friendly, has the lowest ecological impact on all energy storage technologies, and does not use elements such as lead or cadmium as the main reactants.

Renewable Energy

The lifepo4 battery energy storage system can be used as a buffer between various power sources and stable power demand, and can increase the power generation capacity of unstable power sources such as wind energy and solar energy. The wind power system causes the output power to oscillate due to the change of the wind speed, and the energy storage system can provide stability and reactive power compensation for the fan output through the characteristics of fast response speed and almost equal charge and discharge cycle. At the same time, the energy storage system can regulate the voltage and control the system frequency in an off-grid power generation system.

In the economic sense, the direct consequence of uncertain power output is the decline in customer willingness to pay or the resulting reduction in capital credit. Configuring the energy storage system for wind turbines will provide volatility and provide a stable power output to the grid, which will increase the price of electricity generated by wind power.

Power supply in remote areas

In remote areas sparsely populated, such as islands, diesel generators are often used as a single source of energy. Diesel generators tend to operate at unrated power due to load changes, which reduces fuel efficiency by up to 30%.

Configuring the energy storage system for the off-grid power supply system can effectively reduce diesel consumption, operation and maintenance costs, greenhouse gas emissions and extend the life of the diesel engine.

The ratio of wind power generation and photovoltaic power generation to total diesel power generation is increasing. When the ratio reaches about 30%, the instability will directly reduce the reliability of the local power grid, and should limit the increase of more renewable energy. Power generation. However, by configuring the energy storage system, the ratio can be achieved by 100%, and the payback period of the project is shortened to 3 years. As fuel prices rise, economics will become more pronounced.

Communication base station

Conventional battery systems used by communication base stations are often used as backup power sources to ensure short or instantaneous power failures of about 5-20 times per year, which do not require frequent deep charge and discharge cycles.

The target market for the 5KW-8 hour deep cycle energy storage system is the communication base station in the off-grid or weak grid area, which will enable these communication base stations to achieve repeated cycles or use hybrid systems such as wind and solar power.

The energy storage system greatly reduces operating costs and diesel consumption, thereby extending the life of the diesel engine and reducing the sensitivity of the communication base station to changes in ambient temperature.

Investment deferral

lifepo4 battery energy storage system can be used to save fixed equipment investment in power grid system; improve grid equipment utilization, reduce financial risk, avoid huge amount of one-time investment and equipment utilization is extremely low, and invest more for more needs More important occasions; lower end-user cost of use. Other important advantages that energy storage systems can achieve in power transmission and distribution systems include:

Improve service reliability and power quality through reactive power compensation and voltage regulation;

Peaking and valley filling, storing wave trough power sold at the peak, thereby reducing the market risk of peak price fluctuations and controlling the high cost of energy imbalance; reducing local line power, correcting power factor, adjusting voltage to reduce line loss; reducing line congestion, Provides a smooth channel in the bottleneck of the energy supply; provides rotary standby, reactive power, oscillation compensation, and black start capability;

Basic users can use valley power at peak power usage, increasing equipment usage and capacity expansion.


Peak clipping

The energy storage system can reduce the peak load of user energy at the distribution end, which will promote the utilization of grid equipment and meet the needs of end customers. The grid load factor is thus improved. The chart below shows that significant power savings can be achieved by selectively releasing power during peak usage.

Smart grid

The smart grid is an important part of the future developed grid management system, and the energy storage technology has a huge market space.

Self-healing transmission and distribution system

In order to meet the rapidly growing demand for electricity consumption in society, it is necessary to vigorously develop a “self-healing” transmission and distribution system to achieve automatic prediction and respond quickly to disturbances, thereby continuously optimizing power quality. According to the EPRI Power Technology Development Route Report, “by 2020, the demand for quality electricity will spread to any corner of the economy and society.”

The huge benefits of self-healing grids include not only improving power reliability, but also continually improving end-customer services, reducing operating costs and delivering more efficient power throughput based on existing power networks. The self-healing grid also has a good resistance to terrorist attacks. Typical goals to be achieved by a self-healing grid include:

Dynamically optimize grid system performance for rapid response to disturbances to minimize negative impacts and quickly and efficiently restore operations

Fully mobilizing user response as an effective means of managing the grid As the share of renewable energy in the grid system continues to increase, these unstable power sources will require smart grid and energy storage technologies. A system approach to construct a self-healing grid using demand side management techniques and energy storage.

The self-healing grid control system consists of a series of network nodes with linear, non-linear loads. Control sensors are used to monitor power characteristics, control relays are used to communicate with non-linear loads, and battery energy storage systems enable connections between primary power sources and power nodes. The priority recovery controller is connected to the control sensor, the control relay, and the battery energy storage system. The control signal is received from the control sensor, and the battery energy storage system is automatically activated to provide stable power to the linear load in response to detecting irregularities in the power grid. The control relay is selectively disconnected to disconnect a non-linear load.


*
*
*
*
*
Min