Data analytics and computational methods for anti-islanding of renewable energy based Distributed Generators in power grids

A Doubly-Fed Induction Generator Adaptive Control Strategy and Coordination Technology Compatible with Feeder Automation

“…As different modes demand different control strategies and operation rules, DFIG requires island detection technology to achieve switching between grid-connection and island modes. There are three island detection technologies: communication-based, active and passive [10], and the establishment of communication between DFIG and DN results in additional costs and higher complexity of DFIG penetration. Operated by different companies, the DFIG is not connected to the DN through secondary cables in real cases, while the active and passive island detection technologies are not reliable enough and a certain period of time elapses before an island is detected [10].…”

“…There are three island detection technologies: communication-based, active and passive [10], and the establishment of communication between DFIG and DN results in additional costs and higher complexity of DFIG penetration. Operated by different companies, the DFIG is not connected to the DN through secondary cables in real cases, while the active and passive island detection technologies are not reliable enough and a certain period of time elapses before an island is detected [10]. Furthermore, the DFIG is located comparatively remote from the DN (1-2 km in general cases), and the tie-switches are flexibly positioned, requiring a distant synchronous grid-connected process for DFIG islands in grid-connection through tie-switches, which makes this new mode essentially different from the traditional local synchronous grid-connection technology of DFIG.…”

“…In recent years, researchers and institutions around the work have proposed various protection strategies and specific control technologies for active DNs, aiming to fast isolate the failures in the protection system at the grid side, and guarantee the safe operation of DGs at the DG side, while power authorities and international power organizations have formulated protection standards and specifications for DNs involving DGs to enhance the reliability of the DN [10,11]. Presently, the mainstream engineering DN-side protection is fast and non-selective connection of all DGs in case of any failure in the DN in any form, so that the existing protection will not be negatively affected [12].…”

“…Presently, the mainstream engineering DN-side protection is fast and non-selective connection of all DGs in case of any failure in the DN in any form, so that the existing protection will not be negatively affected [12]. Where an islanding status is detected by an existing DG, its internal control system will, in general cases, activate the anti-islanding protection mechanism to achieve disconnection and shutdown of DGs quickly [10,13], while DGs with fault rid-through capacity can be removed from the grid after a delay of a limited period in any failure [8]. For doubly-fed induction generator (DFIG), it will start crowbar protection immediately under fault scenario [7].…”

A review on the influence of intelligent power consumption technologies on the utilization rate of distribution network equipment

“…The integration of distributed generation (DG) and the application of intelligent power consumption technologies affects the utilization rate of distribution network equipment [50][51][52].The application of V2G technology can effectively reduce the impact of distributed generations on distribution networks and improve the stability of the power system. V2G technology makes the participation in the power generation of large-scale wind, solar and other new energy sources possible.…”