New algorithm for fault detection in renewables microgrids
An international research team has developed a protection scheme for enhancing fault detection in inverter-based microgrids.
The scheme utilizes an algorithm based on modified cumulative sum (MCUSUM) quality control, which is a method for sudden change detection for microgrid protection.
“This method is very effective and owns high speed, even in microgrid protection,” the scientists explained. “But it is not reliable and secure enough for inverted-based microgrids, due to the above-mentioned limitations in such microgrids. So, the modification to CUSUM is proposed in this paper that enables it to detect the direction change.”
The proposed scheme can be used for both grid-forming (GFM) and grid-following (GFL) microgrids, with the related operations being activated via a selector switch. Its core is its ability to detect direction change in the line current at the instant of fault inception, with two relays monitoring the direction changes of the currents at both ends of the line.
“The relays at both ends of the line communicate with each other and share the detected changes,” the team explained. “If a falling flag is detected, the status of 0 will be sent to the other side, whereas a rising flag will prompt a transmission of 1. Then, each relay at both sides of the line will recognize that the fault is within their protection zone considering the fact that the far-end relay produces an opposite flag.”
The novel algorithm was tested through a series of simulations via Typhoon software, with both grid-connected and stand-alone modes being considered. The analysis took into account the grid codes of Germany, Spain, and Ireland, as well as different types of faults at different locations with different fault resistance values.
The scientists claimed the simulations showed the novel approach offers “effective, fast, and selective operation,” while requiring a low computational burden and simple communication infrastructures.
“The proposed method not only addresses the limitations of existing protection strategies but also showcases adaptability in diverse operational scenarios, making it a practical solution for enhancing the reliability of microgrid systems with high renewables penetration,” they concluded.
The novel methodology was introduced in “,” published in Electric Power Systems Research. The research group comprised academics from Canada's Toronto Metropolitan University and the Qom University of Technology in Iraq.
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
