A method for predictive out-of-step tripping based on synchrophasors

Duong, Thuc Dinh; D’Arco, Salvatore; Holdyk, Andrzej

doi:10.1049/cp.2020.0022

Cited by 3 publications

(7 citation statements)

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“…The conventional SG out-of-step protection based on impedance measurement (13) Digital low-pass filter -The correlated data window size, used for calculating the correlation coefficients, is considered a digital low-pass filter -Some of them require additional digital low-pass filters [14,22,26] (14) Simplicity -The algorithm uses simple and fast mathematical operations, and can be used as a real-time method due to its implementation and adjustment with ease -Some algorithms use complicated mathematical models [17,18,25,27] (15) Relay accuracy -The results show the good properties of the proposed algorithm in terms of safety and accuracy of out-of-step detection. The simulation results show that the proposed method predicts and detects instability accurately with appropriate prediction time -Some conventional algorithms lose the accuracy property of out-of-step prediction and detection, as well as assessment of the remaining time until instability [5,8,11] (16) Relay reliability -The proposed scheme verifies the requirements of protection reliability (i.e., dependability and security) for operation. The relay reliability is mainly evaluated by the failure absence of the relay operation -The proposed method not only predicts the stability condition, but also extracts the instability time, and, therefore, the remaining time until instability (i.e., out-of-step occurrence).…”

Section: Item Of Comparisonmentioning

confidence: 89%

“…In [4], an instability tolerant synchronous generator was used at the critical points of the power network, which was designed such that it had a higher specific magnetic loading to reduce power oscillations and failures. A predictive OOS tripping based on synchro-phasors is described in [5]. The OOS condition was predicted based on the input signal that can be either the phase angle between two nodes in the power grid or the line current magnitude.…”

Section: Introductionmentioning

confidence: 99%

“…When generators experience out‐of‐step (OOS) conditions and out‐of‐step tripping (OOST) relays separate them from the system, it is common that nearby generators and transmission system terminals also encounter oscillations similar to those experienced by the OOS generator. The OOS phenomenon is similar to an unstable power swing [5].…”

Section: Introductionmentioning

confidence: 99%

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Out‐of‐step detection of synchronous generators using dual computational techniques based on correlation and instantaneous powers

Mahmoud

Malik

2022

IET Generation Trans & Dist

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To maintain synchronous operation of interconnected systems, it is necessary to keep balance between power generation and consumption. Faults may result in large oscillations in power flows and loss‐of‐synchronism between one generator and the rest of the power system. A correlation coefficient is a useful statistic that can be used to detect voltage, frequency or angular instabilities, and to determine an asynchronous process. Hence, it is a smart technique to predict the out‐of‐step event following fault situations. In this paper, the technique based on the auto/cross‐correlation and instantaneous powers is presented to identify sudden disturbances of various electrical signals in the case of asynchronous operation. To validate the method performance, a power network with real parameters is simulated on Alternative Transient Program (ATP) platform, and the algorithm is implemented in MATLAB software. Simulation studies reveal that the proposed scheme is able to detect the out‐of‐step conditions upon which the relay issues a trip signal, yet remains inactive under normal synchronized operating conditions. Thus, the out‐of‐step is declared before the second pole slipping occurs, and an instability time can be accurately assessed. Moreover, it can develop novel quadrilateral operating characteristics to discriminate between the synchronous and asynchronous operation of the AC generator.

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Section: Item Of Comparisonmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Out‐of‐step detection of synchronous generators using dual computational techniques based on correlation and instantaneous powers

Mahmoud

Malik

2022

IET Generation Trans & Dist

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“…Predictive OOS based on synchrophasors [11] Enhances existing OOS protection, provides more secure and reliable operation compared to existing methods. Has been proven in a prototype installation.…”

Section: Unconventional Oos Detection Approaches Based On Local Measu...mentioning

confidence: 99%

Online Detection of Out-of-Step Condition Using PMU-Determined System Impedances

et al. 2022

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This paper presents a robust and adaptive out-of-step (OOS) protection algorithm, using wide-area information, that can be applied on tie-lines in observable power systems. The developed algorithm is based upon real-time computation of the system impedance and makes use of the wellknown power-angle characteristic. In this way, a setting-less OOS concept in real-time environment is developed, which is applicable for tie-lines in an arbitrary power system. Furthermore, the developed protection algorithm is installed on hardware and is verified by numerous tests. The performance of the new hardware implementation is compared to the traditional impedance-based OOS protection methods. The results confirm that the proposed algorithm detects OOS conditions faster and more reliably than the traditional impedance-based solutions.INDEX TERMS Out-of-step protection, power system transient stability, tie-lines, real-time HiL testing.

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“…Predictive OOS based on synchrophasors [11] Enhances existing OOS protection, provides more secure and reliable operation for oscillatory OOS compared to existing methods; has predictive properties.…”

Section: Unconventional Oos Detection Based On Wide-area Informationmentioning

confidence: 99%

Out-of-Step Protection Based on Discrete Angle Derivatives

Tealane

Kilter

Bagleybter³

et al. 2022

IEEE Access

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This paper presents an out-of-step protection algorithm based on angle derivatives, which makes use of wide-area measurements and can be applied on arbitrary tie-lines in electrical power systems. The developed algorithm uses PMU measurements that are taken at both ends of a transmission line. Based on the changes of the electrical quantities in the power system, the algorithm detects unstable system conditions. Thus, the developed solution is settingless and can be easily applied where an outof-step condition is expected. The concept is deployed by using an industrial controller and tested by conducting numerous hardware-in-the-loop simulations. Additionally, recorded data from actual out-of-step events in the Icelandic power system are used to validate the developed algorithm. The performance of the implemented method is compared against the traditional impedance-based out-of-step protection methods. The results confirm that the proposed algorithm detects out-of-step conditions more reliably and faster than the traditional impedance-based solutions.INDEX TERMS Out-of-step protection, power system transient stability, tie-lines, real-time HiL testing.

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A method for predictive out-of-step tripping based on synchrophasors

Cited by 3 publications

References 0 publications

Out‐of‐step detection of synchronous generators using dual computational techniques based on correlation and instantaneous powers

Out‐of‐step detection of synchronous generators using dual computational techniques based on correlation and instantaneous powers

Online Detection of Out-of-Step Condition Using PMU-Determined System Impedances

Out-of-Step Protection Based on Discrete Angle Derivatives

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