Out-of-Step Protection Based on Equal Area Criterion

Alinezhad, Bahman; Karegar, Hossein Kazemi

doi:10.1109/tpwrs.2016.2584121

Cited by 42 publications

(53 citation statements)

References 17 publications

(20 reference statements)

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“…In the actual operation process of power grid, a large-scale interconnected power grid will appear in the phenomenon of coherency and cluster instability after a specific disturbance, where coherency refers to the group of generator sets with the same or similar movement change trend of generator rotor after the disturbance, and cluster instability denotes loss of synchronism between this group of Sustainability 2020, 12, 1769 3 of 20 units and other clusters [21]. The slow coherence theory has two-time scale properties, which can be divided into slow mode and fast mode.…”

Section: Slow Coherency Theory For Power Systemmentioning

confidence: 99%

Research on Transmission Network Expansion Planning Considering Splitting Control

et al. 2020

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A robust and reliable grid is one of the core elements for power network planning. Specifically, splitting is an effective way for power grid out-of-step oscillation. Since the cross-section of system out-of-step is mostly found on the weak connection lines, reducing the number of those lines can be conducive to the system partition, save the finding time of the optimal splitting cross-section, and improve the performance of the splitting control. This paper proposed an enhanced method based on slow coherence theory for weak connection lines' identification and monitoring. The ratio of the number of weak connection lines to the number of all the lines, called weak connection coefficient, is considered as a crucial factor. A bi-level programming model, which perceives the minimum connection coefficient as the optimization goal, is built for the transmission network. Additionally, a fused algorithm, consisting of Boruvka algorithm and particle swarm optimization with adaptive mutation and inertia weight, is employed to solve the proposed method in the instances of an 18-node IEEE Graver system and a practical power grid in East China. Simulation results in PSD-BPA are conducted to verify the effectiveness of the weak connection monitoring method and transmission network planning model.

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Section: Slow Coherency Theory For Power Systemmentioning

confidence: 99%

Research on Transmission Network Expansion Planning Considering Splitting Control

et al. 2020

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“…For instance, LOE can be detected, using impedance (Z) [14,15], active power [16], or a combined index of other parameters such as load angle (δ), stator voltage or current, air-gap flux and reactive power [17][18][19][20][21]. Furthermore, OOS is another significant protection which can be detected by P and δ based on equal area criteria [22][23][24][25][26]. Therefore, the successful experience of using generator parameters in detection of LOE and OOS becomes the best motivation for the authors to find out a novel parameter-based method for generators RP protection to improve the speed and security of the previous unsuitable methods.…”

Section: Literature Reviewmentioning

confidence: 99%

Novel fast and secure approach for reverse power protection in synchronous generators

Samami

Azari

2019

IET Electric Power Applications

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The purpose of the reverse power (RP) protection is essentially to prevent severe damage to the generator prime mover. For this aim, directional relays are usually utilised. RP condition (RPC) leads to initial oscillations of power and frequency which might exceed the RP threshold and lead to mal-operation of the relay. Therefore, assigning a time delay is essential to reduce the oscillations. However, this strategy increases the relay trip time, which leads to enhancing the motoring time and the risk of damage to the prime mover. This study proposes a novel algorithm to detect RPC in synchronous generators, based on some easily accessible quantities including active power (P), load angle (δ), internal voltage (E A), terminal voltage (V) and the phase difference between voltage and current (θ). This scheme utilises two criterions including the sign of θ and also comparing V with tangential component of E A on V (E A Cosδ). This algorithm is independent of the size and type of load and is also capable of discriminating RPC with other potential faults. The performance of the proposed approach has been verified with Matlab software and the obtained simulation results show the fastest operation and highest reliability of the proposed technique compared to others.

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“…In the future back up protection solutions for transmission networks not entirely covered with PMU devices (e.g., segments of 220 kV transmission networks) that would have to rely on state estimation are expected to be researched. Recent research work [20,21] highlights the importance of WAMPAC systems in transmission networks. A list of basic features of different technical solutions for advanced protection systems is presented in Table 2.…”

Section: Multifunctional Line Protectionmentioning

confidence: 99%

Wide Area Information-Based Transmission System Centralized Out-of-Step Protection Scheme

Ivanković¹,

Kuzle

Holjevac

2017

Energies

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A wide area monitoring system (WAMS) with reliable telecommunication infrastructure can be expanded and enhanced with additional protection and control functionalities using synchronized phasor data measurements. With that aim, we have developed a multifunctional line protection (MFLP) model with both system and back-up protection functions. Theoretical premises based on transmission and relay protection system knowledge, together with the experience gathered from the operation of existing wide area systems, were used to develop the proposed model. Four main groups of simulation scenarios were defined in order to test the newly implemented functions. The results of the simulation process confirm the assumptions underlying the design of our MFLP module. Simulation results are then used for definition of the protection criteria required for implementation of the wide area protection algorithm in a control center. Conclusions drawn from the protection responses of the proposed algorithm that strengthen the algorithm design process are elaborated in the paper. The main contribution of the paper is the design and development of a centralized MFLP algorithm based on synchronized phasor data that is able to issue a trip command to a circuit breaker before an out-of-step condition occurs.

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Out-of-Step Protection Based on Equal Area Criterion

Cited by 42 publications

References 17 publications

Research on Transmission Network Expansion Planning Considering Splitting Control

Research on Transmission Network Expansion Planning Considering Splitting Control

Novel fast and secure approach for reverse power protection in synchronous generators

Wide Area Information-Based Transmission System Centralized Out-of-Step Protection Scheme

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