Large batteries with grid-forming inverters can increase renewables hosting capacity
From pv magazine USA
The Energy Systems Integration Group has published a study on the benefits of grid-forming battery energy storage systems (GFM BESS). The study is based on research conducted by ESIG’s GFM BESS project team, which evaluated GFM BESS benefits on an actual transmission network.
ESIG explains that GFM controls can provide grid-stabilizing characteristics that support the reliable operation of a power system under increasing levels of inverter-based resources (IBR), such as solar and wind power. While “GFM controls can be implemented on new solar photovoltaic and wind plants, with some limitations,” ESIG says, battery energy storage is “particularly low-hanging fruit” for the implementation of GFM controls.
Solar, wind and storage without GFM controls use grid-following (GFL) inverters.
The project team found that using GFM BESS instead of GFL BESS in a transmission system improves the hosting capacity for solar and wind generators.
The team reached that conclusion by studying a portion of an actual transmission network—a weak local area with limited transmission that is “saturated” with 780 MW of PV generation capacity using GFL inverters, paired with 225 MW of GFL BESS. While in the real world, that weak local area is actually connected to a strong surrounding transmission network, the researchers modeled the local area in isolation in order to model “the weakest grid conditions possible.”
They found that in the weak local area, which would have been “marginally stable” on its own, substituting GFM BESS for the 225 MW of GFL BESS would enable an additional 125 MW of PV with GFL inverters, “demonstrating that increased IBR hosting capacity was obtained before hitting a stability limit.”
The team reported that GFL BESS has a “small incremental cost” above that of GFL BESS “when designed-in up front,” and has a “dramatically lower cost than other solutions” such as synchronous condensers.
The study recommended, among other steps, that transmission system operators consider adopting GFM BESS “system-wide to improve stability and to maximize IBR hosting capacity.”
Another study recommendation is to develop GFM BESS technical requirements and integrate those requirements into facility interconnection requirements.
“Don’t wait,” the study says. “Take advantage of BESS interconnections today” because “retrofits are expensive.”
Among other key findings, the study said that GFM BESS is a “Do No Harm” solution, in part because it provides specific stability benefits in weaker grids and operates stably and reliably in strong grids.
In addition, it found that GFM BESS systems are interoperable across original equipment manufacturers and with GFL inverters; can help defer other more costly solution options; and can serve as a bridge to long lead-time solutions.
The project team plans to publish a brief on the benefits of GFM BESS for decision makers, policymakers and regulators, and to conduct outreach to key stakeholders.
The project team’s core modeling and study team efforts were conducted by Elevate Energy Consulting, Electranix Corporation, and ESIG, in partnership with the utility American Transmission Company.
Customized/OEM/ODM Service
HomSolar Supports Lifepo4 battery pack customization/OEM/ODM service, welcome to contact us and tell us your needs.
HomSolar: Your One-stop LiFePO4 Battery Pack & ESS Solution Manufacturer
Our line of LiFePO4 (LFP) batteries offer a solution to demanding applications that require a lighter weight, longer life, and higher capacity battery. Features include advanced battery management systems (BMS), Bluetooth® communication and active intelligent monitoring.
Customised Lithium Iron Phosphate Battery Casing
ABS plastic housing, aluminium housing, stainless steel housing and iron housing are available, and can also be designed and customised according to your needs.
HomSolar Smart BMS
Intelligent Battery Management System for HomSolar Energy Storage System. Bluetooth, temperature sensor, LCD display, CAN interface, UART interface also available.
Terminals & Plugs Can Be Customized
A wide range of terminals and plugs can be customised to suit the application needs of your battery products.
Well-designed Solutions for Energy Storage Systems
We will design the perfect energy storage system solution according to your needs, so that you can easily solve the specific industry applications of battery products.
About Our Battery Cells
Our energy storage system products use brand new grade A LiFePO4 cells with a battery lifespan of more than 4,000 charge/discharge cycles.
Applications in Different Industries
We supply customized & OEM battery pack, assemble cells with wiring, fuse and plastic cover, all the cell wires connected to PCB plug or built BMS.
Applications: E-bike, Electric Scooter, Golf Carts, RV, Electric Wheelchair, Electric Tools, Robot Cleaner, Robot Sweeper, Solar Energy Storage System, Emergency Light, Solar Power Light, Medical Equipment, UPS Backup Power Supply.
We can provide you with customized services. We have the ability to provide a vertical supply chain, from single cells to pack/module and to a complete power solution with BMS, etc.
HomSolar (Shenzhen) Technology Co., Ltd
