Transients outrush current analysis and mitigation: A Case study of Afghanistan North East power system

Abdul Matin Ibrahimi; K Narayanan; Mohammed Elsayed Lotfy; Mir Sayed Shah Danish; Mikaeel Ahmadi; Tomonobu Senjyu; Abdul Matin Ibrahimi; K Narayanan; Mohammed Elsayed Lotfy; Mir Sayed Shah Danish; Mikaeel Ahmadi; Tomonobu Senjyu

doi:10.3934/energy.2019.4.493

AIMS Energy

2019, Volume 7, Issue 4: 493-506. doi: 10.3934/energy.2019.4.493

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Research article Special Issues

Transients outrush current analysis and mitigation: A Case study of Afghanistan North East power system

1.
Faculty of Engineering, University of the Ryukyus, Japan
2.
Department of Electrical and Electronics Engineering, SASTRA DEEMED University, Thanjavur, India

Received: 25 May 2019 Accepted: 04 August 2019 Published: 22 August 2019

This study evaluates the inconveniences raised by the installation of Shunt Capacitor Banks (SCB) along the North East Power System (NEPS) in Afghanistan. Besides the numerous advantages, a capacitor bank usually has some drawbacks in terms of transient currents which affect the quality of power supply and exceed the withstand capability of associated equipment. In this study, transient outrush current injects by installed SCB into the nearby faulted point at Pule Khumri and Chimtala substations is investigated. Outrush transient is produced by SCB when the breaker is operating to disconnect the faulted circuit. By applying different methods can mitigate outrush transient and protect the system which Current Limiting Inductance (CLI) is preferred in this study. Integrating CLI in series with SCB is the most relevant method which can limit the amplitude, frequency, and the rate of rise of the outrush transient. The use of inductance could otherwise create some excessive voltage which might exceeds the withstand capability of circuit breakers. Hence sensitivity analysis based on Transient Recovery Voltage (TRV) to confirm the robustness of the proposed approach is carried out. The evaluation is accomplished based on the result derived from the Electromagnetic Transients Program (EMTP), ATP package.

Keywords:

Citation: Abdul Matin Ibrahimi, K Narayanan, Mohammed Elsayed Lotfy, Mir Sayed Shah Danish, Mikaeel Ahmadi, Tomonobu Senjyu. Transients outrush current analysis and mitigation: A Case study of Afghanistan North East power system[J]. AIMS Energy, 2019, 7(4): 493-506. doi: 10.3934/energy.2019.4.493

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Abstract

Environmental degradation and climate change exacerbate the challenges humanity faces. Coping with climate change, controlling environmental pollution and promoting harmonious coexistence between man and nature have become the core issues of sustainable development of the global economy and society. The Sustainable Development Goals and the Paris Agreement on Climate Change indicate a fundamental re-organization of both the financial system and the economy it serves and also imply an intensive study of the current economic and financial development model of every country. Hence, aligning finance with sustainability is subject to much research, experimentation and practice.

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Firstly, green finance research is an important means to promote the sustainable development of society, economy and ecology. Green finance is defined as comprising "all forms of investment or lending that consider environmental effect and enhance environmental sustainability" (Volz et al., 2015: 2). Sustainable investment and lending are significant aspects of green finance, considering sustainable standards, and environmental and climate risks. Besides, to align the financial system and policies with sustainable goals are also crucial for achieving a green transformation. Sustainability is without doubt a very important area of research, evidenced by its unprecedented growth in the last decade. In the field of academic research, sustainability-themed papers are becoming more and more prominent with rising awareness of challenges such as global climate change and resources shortage. With the development of the economy, the financial system and mechanism are continuously adjusted to mobilize and allocate financial resources reasonably and effectively and improve financial efficiency, so as to realize the effective operation and steady development of the economy and finance in the long run. The quantitative research of green finance can greatly promote the sustainable development of domestic and global economy and finance. The UNEP Inquiry (2015) identified five areas of emerging practice in embedding sustainable development into the financial system which are all worth studying in the near future: (ⅰ) enhancing market practice: Disclosure, analysis, risk management; (ⅱ) upgrading governance architectures: Internalizing sustainable development into financial decision-making of financial regulators and central bank; (ⅲ) encouraging cultural transformation: capacity building, behaviour, market structure; (ⅳ) harnessing the public balance sheets: Fiscal incentives, public financial institutions and central banks; (ⅴ) directing finance through policy: Requirements and prohibitions, enhanced liability.

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