To ensure the continuous operation of voltage source converter based multi-terminal HVDC system (VSC-MTDC), there has been much concern regarding how to isolate single-pole earth fault by means protective relaying. However, when boundary components are not on dc transmission lines, conventional main protections for systems perform less satisfactorily. solve this problem, a local measurement-based ultra-high-speed protection is proposed, in paper. The proposed method achieved cooperation...

Fault location is one of the most essential techniques to maintain stable operation power systems. A fast and accurate fault allows operators restore grids faster avoid economic losses. Conventional methods rely on expert knowledge extract necessary features (e.g. DWT, DFT). For large systems, more coupling effects transmission lines require complex feature engineering, incomplete can easily introduce errors. To overcome this, a deep learning approach without manual extraction introduced...

This work presents a novel blockchain-based energy trading mechanism for electric vehicles consisting of day-ahead and real-time markets. In the market, vehicle users submit their bidding price to participate in double auction mechanism. Subsequently, smart match will be conducted by charging system operator, meet both personal interests social benefits. After clearing result, operator uploads contract made market blockchain. checks status submits updated results encourages participants...

High‐density synchrophasors provide valuable information for power grid situational awareness, operation and control. Unfortunately, due to factors including communication instability hardware failure, their data quality can be greatly deteriorated by anomalies. Since the anomalies impact performance of synchrophasor applications, it is paramount significance propose a model detect in synchrophasor. In this study, convolutional neural network established classify measurements. Four types...

Parallel computing helped speed up many tasks that can be done independently. The advance in gaming industry did not produce a technology helps the power to reduce computation time for dynamic simulation individual cases. To perform faster than real-time purpose of predicting system trajectory, continues struggle size and large-scale systems while keeping its behavior under various disturbances. There is also an acute need model reduction as more renewables enter generation mix with dramatic...

As the most suitable main protection for multiterminal transmission lines represented by T-connections, current differential exhibits great performance due to its high reliability and sensitivity. However, considering multiple substations geographically, there are more severe problems of data synchronization than double-terminal types based on a typical channel. To solve aforementioned problems, operating characteristics line under different errors ρ plane first analyzed. Based influence...

The half-wavelength ultra-high-voltage transmission system is an alternative technique for bulk-power over very long distances. However, the operations and fault-characteristics of such systems are extremely different from conventional ones. Therefore, there urgent need to propose a protection scheme that adapts characteristics line. Towards this end, local-measurement-based approach proposed. According frequency-dependent model line, paper uses wavelet transform decompose arrival...

The multi-terminal HVDC system based on the modular multilevel converter (MMC-MTDC) is a promising technique for flexible power transmissions to multiple regions. As such quite sensitive DC faults, there an acute need propose protection element that can trip local circuit breaker (CB) within several milliseconds once internal line fault. However, existing main scheme faces dilemma balancing selectivity and sensitivity. To solve this problem, novel semi artificial-intelligence (AI) proposed,...

To enhance the Low-voltage Ride Through (LVRT) capability of large-scale centralized wind farms is essential for safety farm and security power system. However, LVRT enhancement coordinating control protection individual generators merits consideration. contribute in this way, a Coordinated Sequential Control (CSC) strategy proposed manuscript. Regarding different voltage disturbance scenarios, goal determined real-time. keep as many turbines operating grid-connected possible, multi-staged...

Full converter-based wind generation (FCWG) has become a prevailing choice in new farms. It is usually regarded that low short circuit ratio (SCR) or weak grid key condition to induce oscillations associated with However, we have recently discovered rare phenomenon even strong large SCR, the internal modal resonance of FCWG can still lead and threaten converter-driven stability. To determine FCWG, novel analytical inertia model (AIM) derived elaborate all oscillation modes (FOMs) for first...

Photovoltaic (PV) generation is increasing in distribution systems following policies and incentives to promote zero-carbon emission societies. Most residential PV are installed behind-the-meter (BTM). Due single meter deployment that measures the net load only, this invisible system operators causing a negative impact on planning local supply demand balance. This paper proposes novel data-driven BTM disaggregation method using only weather data, without relying other proxies panels'...

With the capability of limiting increasing short-circuit current power grid, high voltage built-in high-impedance transformer (HVBHT) has been widely used in recent years. However, due to its special structure, magnetizing inrush with magnitude and slow decay is likely occur during no-load energization, which may lead mal-operation zero-sequence overcurrent protection upstream transmission line. This phenomenon become a serious problem actual production China. To solve this problem, modified...

The symmetry of vibration signals collected from healthy machinery, which gradually degenerates with the development faults, must be detected for timely diagnosis and prognosis. However, conventional methods may miss spatiotemporal relationships, struggle varying sampling rates, lack adaptability to changing loads conditions, affecting diagnostic accuracy. A novel bearing fault approach is proposed address these issues, integrates Gramian angular field (GAF) transformation a parallel deep...

The neutral effectively grounded system (NEGS), increasingly adopted in medium-voltage urban AC distribution networks, exhibits heightened susceptibility to fault-induced overcurrent. Despite the deployment of traditional three-zone and zero-sequence overcurrent protection relays, they continue struggle with sensitivity speed limitations. A further complication arises from prevailing reliance on component, given practical difficulties associated installing current transformers (CTs). To...

For the safety and stability of EHV transmission lines, identification isolation high-resistance single-line-to-ground faults have increasingly been a focus research. However, existing protection schemes shown limitations in different aspects when fault resistance is extremely high. To solve this problem, an Enhanced Summation Impedance Relay (ESIR) proposed manuscript. An adaptive threshold set by using double-end absolute values so that ESIR can trip internal independent data...

The doubly fed induction generator (DFIG) and its relative technique, especially in the case where crowbar protection is provided for enhanced low‐voltage‐ride‐through (LVRT) performance, have been hot issues a long time. In this paper, wind farm LVRT standard dilemma that conventional encounters are introduced first place. Then, variation of DFIG rotor faulted current analyzed, with part duration being considered as black box. Therefore, radial basis function neural network (RBFNN) utilized...