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2. Power systems with high renewable energy sources: A review of inertia and frequency control strategies over time

Author

Fernández-Guillamón, Ana, Gómez-Lázaro, Emilio, Muljadi, Eduard, and Molina-García, Angel

Subjects
Electrical Engineering and Systems Science - Systems and Control
Abstract

Traditionally, inertia in power systems has been determined by considering all the rotating masses directly connected to the grid. During the last decade, the integration of renewable energy sources, mainly photovoltaic installations and wind power plants, has led to a significant dynamic characteristic change in power systems. This change is mainly due to the fact that most renewables have power electronics at the grid interface. The overall impact on stability and reliability analysis of power systems is very significant. The power systems become more dynamic and require a new set of strategies modifying traditional generation control algorithms. Indeed, renewable generation units are decoupled from the grid by electronic converters, decreasing the overall inertia of the grid. 'Hidden inertia', 'synthetic inertia' or 'virtual inertia' are terms currently used to represent artificial inertia created by converter control of the renewable sources. Alternative spinning reserves are then needed in the new power system with high penetration renewables, where the lack of rotating masses directly connected to the grid must be emulated to maintain an acceptable power system reliability. This paper reviews the inertia concept in terms of values and their evolution in the last decades, as well as the damping factor values. A comparison of the rotational grid inertia for traditional and current averaged generation mix scenarios is also carried out. In addition, an extensive discussion on wind and photovoltaic power plants and their contributions to inertia in terms of frequency control strategies is included in the paper., Comment: Journal Paper

Published
2020
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3. List of Contributors

Author

Aleem, Muhammad, primary, Alonso-Cepeda, Antonio, additional, Amani, Sadra, additional, Avallone, Francesco, additional, Bahaj, AbuBakr S., additional, Baker, Wes, additional, Barnhart, Charles J., additional, Basu, Sukanta, additional, Bhattacharya, S., additional, Bhattacharya, Subhamoy, additional, Bhowmik, B, additional, Bianchini, Alessandro, additional, Biswal, Surya, additional, Carbajales-Dale, Michael, additional, Cui, Liang, additional, Dai, Kaoshan, additional, Demirci, Hasan Emre, additional, Desmond, Cian, additional, Devrim, Yilser, additional, Dower, Beatrice, additional, Erdem, Ergin, additional, Eryilmaz, Serkan, additional, Fang, Jianhao, additional, Ghosh, B, additional, Ghosh, Bidisha, additional, Gómez-Lázaro, Emilio, additional, González-Sopeña, JM, additional, Greco, Luca, additional, Grieken, Marc van, additional, Guo, Peiyang, additional, Haldar, Sumanta, additional, Hansen, Anca Daniela, additional, Hansen, Martin Otto Lavér, additional, Hong, Yi, additional, Honrubia-Escribano, Andrés, additional, Hu, Weifei, additional, Huang, Zhenhua, additional, Jaksic, Vesna, additional, Jalbi, Saleh, additional, James, Maria, additional, James, Patrick A.B., additional, Jindal, Sachin, additional, Kalmikov, Alexander, additional, Karimirad, Madjid, additional, Lam, Jacqueline, additional, Letcher, Trevor M., additional, Li, Victor O.K., additional, Liu, Junwei, additional, Liu, Zhenyu, additional, Lombardi, Domenico, additional, Lopez-Querol, Susana, additional, Lu, Xi, additional, Machiridza, Lovemore, additional, Malekjafarian, Abdollah, additional, McElroy, Michael B., additional, Mendoza, Jorge, additional, Mucchielli, P, additional, Mudd, Gavin M., additional, Muljadi, Eduard, additional, Murphy, Jimmy, additional, Nikitas, George, additional, O’Byrne, Michael, additional, O’Connor, Ryan, additional, O’Donnell, Deirdre, additional, Pakrashi, V., additional, Pakrashi, Vikram, additional, Prabhakaran, Athul, additional, Prakhya, Ganga, additional, Prendergast, Luke J., additional, Ragheb, Magdi, additional, Ragni, Daniele, additional, Rashid, Haroon, additional, Ruane, Kieran, additional, Sarkar, Rajib, additional, Schoefs, Franck, additional, Shadlou, Masoud, additional, Sheng, Shawn, additional, Shi, Jing, additional, Shoukat, Gohar, additional, Tan, Jianrong, additional, Testa, Claudio, additional, Varghese, Ramon, additional, Villena-Ruiz, Raquel, additional, Wang, Lizhong, additional, Wang, Shanshan, additional, Wang, Ying, additional, Weng, Zhehan, additional, Wright, Christopher Simon, additional, and Zhu, Danyang, additional

Published
2023
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5. Chance-Constrained Day-Ahead Hourly Scheduling in Distribution System Operation

Author

Gu, Yi, Jiang, Huaiguang, Zhang, Jun Jason, Zhang, Yingchen, Muljadi, Eduard, and Solis, Francisco J.

Subjects
Computer Science - Systems and Control
Abstract

This paper aims to propose a two-step approach for day-ahead hourly scheduling in a distribution system operation, which contains two operation costs, the operation cost at substation level and feeder level. In the first step, the objective is to minimize the electric power purchase from the day-ahead market with the stochastic optimization. The historical data of day-ahead hourly electric power consumption is used to provide the forecast results with the forecasting error, which is presented by a chance constraint and formulated into a deterministic form by Gaussian mixture model (GMM). In the second step, the objective is to minimize the system loss. Considering the nonconvexity of the three-phase balanced AC optimal power flow problem in distribution systems, the second-order cone program (SOCP) is used to relax the problem. Then, a distributed optimization approach is built based on the alternating direction method of multiplier (ADMM). The results shows that the validity and effectiveness method., Comment: 5 pages, preprint for Asilomar Conference on Signals, Systems, and Computers 2017

Published
2017

6. Load Forecasting Based Distribution System Network Reconfiguration-A Distributed Data-Driven Approach

Author

Gu, Yi, Jiang, Huaiguang, Zhang, Jun Jason, Zhang, Yingchen, Muljadi, Eduard, and Solis, Francisco J.

Subjects
Computer Science - Systems and Control
Abstract

In this paper, a short-term load forecasting approach based network reconfiguration is proposed in a parallel manner. Specifically, a support vector regression (SVR) based short-term load forecasting approach is designed to provide an accurate load prediction and benefit the network reconfiguration. Because of the nonconvexity of the three-phase balanced optimal power flow, a second-order cone program (SOCP) based approach is used to relax the optimal power flow problem. Then, the alternating direction method of multipliers (ADMM) is used to compute the optimal power flow in distributed manner. Considering the limited number of the switches and the increasing computation capability, the proposed network reconfiguration is solved in a parallel way. The numerical results demonstrate the feasible and effectiveness of the proposed approach., Comment: 5 pages, preprint for Asilomar Conference on Signals, Systems, and Computers 2017

Published
2017

14. List of contributors

Author

Baker, Kyri, primary, Dabbaghjamanesh, Morteza, additional, Du, Yuhua, additional, Feng, Cong, additional, Jiang, Huaiguang, additional, Kang, Chongqing, additional, Li, Hai, additional, Li, Yan, additional, Lin, Yuzhang, additional, Liu, Yilu, additional, Liu, Yong, additional, Liu, Yu, additional, Liu, Yuanzhi, additional, Lu, Xiaonan, additional, Muljadi, Eduard, additional, Qu, Zhihua, additional, Su, Yu, additional, Sun, Mucun, additional, Sun, Wei, additional, Wang, Qin, additional, Wang, Xiongfei, additional, Wang, Yi, additional, Xu, Ying, additional, Yang, Jingwei, additional, You, Shutang, additional, Zhang, Jie, additional, Zhang, Ning, additional, Zhang, Xiangyu, additional, Zhang, Yingchen, additional, Zhao, Changhong, additional, and Zhao, Junbo, additional

Published
2021
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15. Introduction

Author

Li, Yan, primary, Zhao, Changhong, additional, Jiang, Huaiguang, additional, Zhang, Yingchen, additional, and Muljadi, Eduard, additional

Published
2021
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21. WECC Wind Generator Development (including appendices)

Author

Muljadi, Eduard and Ellis, Abraham

Abstract

Phasor-based interdependencies of multiple harmonic sources, especially Distributed Energy Resources, on distribution networks are analyzed in this paper. A new index, Phasor Harmonic Index (IPH), is proposed by the authors. IPH considers both harmonic source magnitude and phase angle for different harmonic orders. Other commonly used harmonic indices are based solely on magnitude of waveforms. A very detailed model of a distribution network is used in the harmonic assessment. With the help of the detailed distribution network model, the phase couplings and the phase balancing impacts on harmonic propagation between three phases are investigated. Moreover, effects of harmonic source phase angle deviations are analyzed at both the customer side and the substation side. This paper investigates the importance of phase angles in harmonic assessment and how distribution network characteristics can be analyzed appropriately with phasor-based harmonic studies. In addition to device level harmonics, system level harmonic propagation need to be considered.

Published
2010

22. Model Validation of Wind Turbine Generator

Author

Muljadi, Eduard and Ellis, Abraham

Abstract

California is striving to achieve 33% renewable penetration by 2020 in accordance with the state’s Renewable Portfolio Standard (RPS). The behavior of renewable resources and electric vehicles in distribution systems is creating constraints on the penetration of these resources into the distribution system. One such constraint is the ability of present-­‐‑day voltage management methodologies to maintain proper distribution system voltage profiles in the face of higher penetrations of PV and electric vehicle technologies. This white paper describes the research gaps that have been identified in current Volt/VAR Optimization and Control (VVOC) technologies, the emerging technologies which are becoming available for use in VVOC, and the research gaps which exist and must be overcome in order to realize the full promise of these emerging technologies.

Published
2010

25. WECC Wind Generator Development

Author

Muljadi, Eduard and Ellis, Abraham

Abstract

A presentation for the i4Energy Seminar Series for Spring 2011, February 4, 2011, UC Berkeley, Berkeley, California

Published
2010

26. Wind Power Plant Equivalencing

Author

Muljadi, Eduard and Ellis, Abraham

Abstract

Developed and conducted a demonstration of two real-time software tools to provide a grid operator a display of information and alarms from a network of phasor monitoring units and analysis of voltage security. Performed a scoping study that examined and prioritized options for data collection to improve the load and generator models used by CAISO and its control member utilities.

Published
2010

37. Wind Power Generation

Author

Singh, Mohit, Muljadi, Eduard, Gevorgian, Vahan, Santoso, Surya, Chakraborty, Sudipta, editor, Simões, Marcelo G., editor, and Kramer, William E., editor

Published
2013
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39. Enhanced Frequency Support Scheme of Generic Inverter-Based Resource Models for Renewable-Dominated Power Grids

Author

Kim, Jinho, primary, Muljadi, Eduard, additional, Vyakaranam, Bharat, additional, Nguyen, Quan, additional, Maharjan, Manisha, additional, Tbaileh, Ahmad, additional, Datta, Sohom, additional, Du, Wei, additional, Liu, Yuan, additional, Chen, Yousu, additional, Seo, Sangwon, additional, Al, Mamun M, additional, and Samaan, Nader A., additional

Published
2022
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