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New time domain distance protection for renewable connected and series compensated transmission lines 17

New time domain distance protection for renewable connected ...

引用

17th International Conference on developments in Power System Protection, dPSP 2024

作者： Naidu, O.d. Krakowski, Marcin Zubic, Sinisa Grid Automation R&D Hitachi Energy Bangalore India Grid Automation R&D Hitachi Energy Vasteras Sweden

ISBN: (纸本)9781837241521

The nature of today's power transmission networks is getting more complicated and dynamic. Fast, secure, and dependable protection decisions are required for systems that interface with power electronic converters, such as renewable energy resources, series compensated lines, HVdC, FACTS, etc. In these networks, the phasor-based distance protection is prone to reliability problems and has intrinsic speed limitations. In order to satisfy the modern grid protection requirements, we developed a time domain-based protection solution for using incremental quantities of the voltage and currents measured at relay location. The proposed method identified the fault zone by comparing a dynamic restraining quantity which is calculated for the fault zone boundary point with the actual rate of change of current measured at the relay location. The method is implemented in relay platform and validated with both rTdS and field data. The performance of the proposed method is found to be secure, reliable, and fast for lines connected with inverter based renewable resources and series compensated lines. © The Institution of engineering & Technology 2024.

关键词： Power transmission lines

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Setting-free Smart recloser for Three Terminal Mixed Lines 7

Setting-free Smart Recloser for Three Terminal Mixed Lines

引用

7th International Conference on Computer Applications in Electrical engineering-recent Advances, CErA 2023

作者： Likhitha, Kukkala Naidu, O.d. Hitachi Energy Grid Automation R&d Bengaluru India

ISBN: (纸本)9798350305005

The paper presents a setting-free smart auto-reclosing for three-terminal mixed lines. To perform auto-reclosing for such configurations, the faulted section must be known. The method calculates series impedance with the obtained pre-fault data to eliminate the need for parameters as a setting. The faulted section of the three-terminal mixed lines is identified by using calculated parameters and during fault data. The voltage at each Bus is computed and then compared against the measured voltage at the Bus. The minimum difference between the computed and measured voltage indicates the healthy sections, thereby indicating the faulted section. We used EMTdC/PSCAd simulations and practical system data to validate the method and found to be reliable. © 2023 IEEE.

关键词： reclosing circuit breakers

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Traveling wave-based setting free fault location for transmission lines using unsynchronized data

Traveling wave-based setting free fault location for transmi...

引用

2023 IEEE International Conference on Energy Technologies for Future grids, ETFG 2023

作者： Pradhan, Vedanta Naidu, O.d. Hitachi Energy Grid Automation R&d Bangalore India

ISBN: (纸本)9781665471640

A method is proposed for locating fault on two-terminal transmission lines using traveling-waves from two-ended unsynchronized current measurements. It considers the line length to be divided into four zones and computes per unit fault locations assuming the fault to be present in each of these zones separately. It then estimates the faulted zone, and the corresponding fault location estimate is displayed as the final output. These computations involve measuring three travelling wave arrivals at each terminal. The method is free of wave speed (or line parameter) input and is inherently immune to data synchronization issues. The method can work satisfactorily even when current measurements from both the ends are not properly synchronized. It is tested on a 200 km transmission line simulated in PSCAd/EMTdC. It works satisfactorily for various fault scenarios and is robust to errors in wave speed and data synchronization errors. The performance is also compared with a classical two-terminal method. © 2023 IEEE.

关键词： fault location monitoring protection setting-free transmission line Travelling wave unsynchronized data

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A Practical Methodology for Fault Location in Transmission Lines Without Line Parameter Settings and data Synchronization 17

A Practical Methodology for Fault Location in Transmission L...

引用

17th International Conference on developments in Power System Protection, dPSP 2024

作者： rithisha, Penta Naidu, O.d. Pradhan, Vedanta Srikanth, Nandiraju Venkata Grid Automation R&D Hitachi Energy Bangalore India Department of Electrical Engineering National Institute of Technology Warangal India

ISBN: (纸本)9781837241521

reliable fault location for power transmission networks requires line parameters and time synchronized voltage and current measurements from all terminals which may not always be available. In this work, a setting-free fault location methodology using unsynchronized data from the line terminals is proposed. This requires computation of data synchronization error which manifests as a phase angle error between the two terminal phasor measurements. The data synchronization angle is computed using unsynchronized phasors and a design factor related to the line. The design factor can be estimated from a set of synchronized measurements and stored. Upon detecting failure of the data synchronization mechanism, the same can be used to calculate the data synchronization angle between the unsynchronized measurements. The line parameters and subsequently fault location is computed using unsynchronized data and the estimated data synchronization angle. The proposed solution is verified using laboratory experimental and field data and it is found to be accurate. © The Institution of engineering & Technology 2024.

关键词： Velocity measurement

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New time domain distance protection for renewable connected and series compensated transmission lines

New time domain distance protection for renewable connected ...

引用

17th International Conference on developments in Power System Protection (dPSP 2024)

作者： O. d. Naidu Marcin Krakowski Sinisa Zubic Grid Automation R&D Hitachi Energy Bangalore India Grid Automation R&D Hitachi Energy Vasteras Sweden

ISBN: (数字)9781837240852

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Intent-based Industrial Network Management Using Natural Language Instructions

Intent-based Industrial Network Management Using Natural Lan...

引用

2022 IEEE International Conference on Electronics, Computing and Communication Technologies, CONECCT 2022

作者： Saha, Barun Kumar Haab, Luca Podleski, Lukasz Hitachi Energy Grid Automation R&d Bangalore India Hitachi Energy Grid Automation Products Bern Switzerland

ISBN: (纸本)9781665497817

Intent-based Networks (IBNs) allow specifying net-work operations using natural languages, which can significantly reduce network management cost and effort, as well as improve efficiency. In this work, we discuss the design of a typical IBN. In particular, we define several intent classes corresponding to different network operations. Subsequently, we use machine learning classification to map a natural language intent into one of those classes. relevant network entities, if any, are also identified. After an intent has been resolved, the corresponding networking task is triggered. We design an IBN prototype based on the proposed architecture by integrating natural language intent processing with a network and a network controller. Subsequently, we evaluate the IBN prototype with sample intents as inputs. The IBN prototype was found to successfully execute the networking tasks, based on input intents, and installed the desired effects, which were verified with network tests. © 2022 IEEE.

关键词： Network architecture

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A closed-form solution to Estimate Parameters of Three-terminal Hybrid Transmission Lines

A closed-form solution to Estimate Parameters of Three-termi...

引用

2023 International Conference on Smart Systems for Applications in Electrical Sciences, ICSSES 2023

作者： Saieesh Ats, Vijay Naidu, O.d. Srikanth, Nandiraju Venkata Hitachi Energy Grid Automation R&d Bangalore India National Institute of Technology Warangal Department of Electrical Engineering Warangal India

ISBN: (纸本)9798350347296

Accurate transmission line parameter values are essential to set the line protection relay applications. The existing parameter estimation methods for three-terminal hybrid lines require multiple measurement sets and employ iterative techniques to solve non-linear equations. Implementation of such methods requires high computation burden, and it is difficult to implement in protection relays. To mitigate these challenges, we proposed a closed-form solution for parameter estimation in three-terminal hybrid transmission lines using two sets of terminal voltage and current measurements recorded at 1 percent power difference. Nonlinear equations are formed by equating junction voltages calculated from two terminals. The hyperbolic terms present in nonlinear equations are replaced with corresponding Taylor's expansion to arrive at a closed-loop form. Line parameters are directly calculated using the closed-loop equation. The proposed method is verified with lines at three different voltage levels connecting conventional systems and inverter based renewable resources simulated in PSCAd/EMTdC and found to be accurate. © 2023 IEEE.

关键词： Nonlinear equations

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Generative Artificial Intelligence for Industry: Opportunities, Challenges, and Impact

Generative Artificial Intelligence for Industry: Opportuniti...

引用

International Conference on Artificial Intelligence in Information and Communication (ICAIIC)

作者： Barun Kumar Saha Grid Automation R&D Hitachi Energy Bangalore India

The recent advances in Generative Artificial In-telligence (GenAI) and Large Language Models (LLMs) have generated significant interest across the world. For a successful adoption of GenAI and LLMs by industry, it is critical to identify their potential benefits, impact, and challenges. Accordingly, in this work, we investigate a few use cases of LLMs, which are relevant across most industry segments. In order to empirically evaluate the impact of GenAI on the code generation use case, we build CodePrompt, a handcrafted dataset of sequential prompts used by a human user to generate code. We approximate efficiency by considering the ratio of the number of tokens of code generated by an LLM to the number of tokens in the user's prompt. Experimental results reveal that a sequential trial of prompts for code generation may lead to an efficiency factor of about 6.33, on average, which means that a user's effort is reduced to about one-sixth.

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Single Ended Fault Location Method for Lines Connected with Inverter Based renewable resources

Single Ended Fault Location Method for Lines Connected with ...

引用

IEEE PES Asia-Pacific Power and Energy engineering Conference (APPEEC)

作者： O. d. Naidu Aarthi V Kukkala Likhitha Hitachi Energy Grid Automation R&D Bangalore India

ISBN: (数字)9798350318098

ISBN: (纸本)9798350318104

The integration of renewable energy sources based on inverters has a negative impact on the accuracy of impedance-based single-ended fault locators due to the phase angle shift introduced by inverter controls and grid codes. In this paper, we proposed two practical approaches to mitigate these challenges. The first approach uses remote current measurement in addition to local measurements when a reliable communication system is available, and the second approach uses local measurements alone to estimate in the absence of communication channel and compensate for the phase angle deviation. Without making any additional infrastructure changes, the proposed method can be used in existing protection relays. The accuracy of the developed method is validated by laboratory experimental and field data.

关键词： renewable energy sources Phase measurement Accuracy Communication systems Current measurement Fault location Inverters

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Traveling wave-based setting free fault location for transmission lines using unsynchronized data

Traveling wave-based setting free fault location for transmi...

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Energy Technologies for Future grids (ETFG), IEEE International Conference on

作者： Vedanta Pradhan O.d. Naidu Hitachi Energy Grid Automation R&D Bangalore India

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