Issues for power system operation for future renewable energy penetration: Robust power system security

IEEE PES Innovative Smart Grid Technologies, Europe

Zoka

et al. 2014

Self Cite

This paper proposes a method of evaluating the N-1 security quantitatively with increased PV penetration. The authors applied the concept of Robust Power System Security (RS) proposed by us to this method. By using Robust Dynamic Security region (RDS), which is based on this concept and the key region for judging the security, we can evaluate the power system security as follows. (1) RDS is identified as the benchmark of the N-1 security. (2) Yearly declining trend of the N-1 security is shown in Japan. (3) The necessary amount of additional power supply capacity can be calculated to maintain the future N-1 security same as the present level. The effectiveness of the proposed method is demonstrated through simulations using a three machines model system.Index Terms-Robust Power System Security (RS),

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A study on the power system security with increased PV penetration by applying the robust power system security

Okumoto

IEEE PES Innovative Smart Grid Technologies, Europe

Zoka

et al. 2014

Self Cite

“…Under the assumptions before the Great East Japan Earthquake, the penetration of photovoltaic power generation (PV) was targeted to reach 20-fold that of 2005 by 2020, and to further increase to 40-fold (approximately 53 GW) by 2030. Therefore, we proposed the new concept for security named Robust security, which can apply the conventional N-1 security in an uncertain environment [5][6][7][8][9][10]. On the other hand, PV has large fluctuations in its output depending on the irradiation conditions.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Power System Security under Future Uncertainties

Okumoto

Electrical Engineering Japan

Sasaki

et al. 2016

Self Cite

In this paper, we propose three applications to quantitatively evaluate N-1 security with increased uncertainties. By using a robust dynamic security region (RDS), which is based on the concept of robust power system security (RS), the key region for judging the security and a new evaluation index for quantitative analysis, we can evaluate power system security as follows. (1) The calculation of the RDS at the time of yearly peak load demand can be recognized as the benchmark for the N-1 security at present, and this method can be applied to the future power system with increased renewable energy resources (RES) such as PV.(2) We show the yearly declining trend for N-1 security resulting from increased PV deployment year by year. (3) We calculate the necessary amount of additional power supply capacity, including conventional electric power generators or storage batteries, needed for maintaining the N-1 security at the present level. The effectiveness of the proposed method is demonstrated through simulations using a model system with three machines. C⃝ 2016 Wiley Periodicals, Inc. Electr Eng Jpn, 197(1): 15-25, 2016; Published online in Wiley Online Library (wileyonlinelibrary.com).Keywords: robust power system security (RS); new evaluation index for N-1 security; benchmark for N-1 security; increased PV penetration.

“…On the other hand, the available capacities of controllable generations and their ramp rates are very limited. In this relation, the authors have proposed a new concept of ‘robust power system security’ by extending the conventional N‐1 security criterion .…”

Section: Introductionmentioning

confidence: 99%

“…as a complement to the existing stochastic approaches. Robust static and dynamic security regions (RSS and RDS) are defined in Refs , respectively, for snapshot state and for dynamic state transition, where we focus on the security region for the transient stability.…”

Section: Introductionmentioning

confidence: 99%

A new method of evaluating robust power system security against uncertainties

IEEJ Transactions Elec Engng

Abdillah

Isoya

et al. 2015

Self Cite

The rapid expansion of renewable energy (RE) generation is leading to severe problems related to the reliability of network operation. Power system security is threatened by increased uncertainties of RE outputs and reduced controllable resources. Therefore, it is important to evaluate the robustness of the system controllability in order to preserve system security against uncertainties of RE outputs. We refer to the robustness of the system in this context as ‘robust power system security’. This paper proposes a new formulation for evaluating the robust security region in controllable parameter space where the conventional N‐1 security criterion suffices in the presence of uncertainties. We specify the confidence interval (CI) of uncertain parameters and obtain the worst case feasible region defined by a set of security constraints, which is a very new approach in the treatment of uncertainties. We use the minimum set of static constraints in the load dispatching problem with CI of RE prediction to evaluate the security region, which is referred to as the robust static security region (RSS) in this paper. The proposed method is useful to assess the degree of difficulty of system planning and operation from the viewpoint of the balance between controllable generator capacity and RE uncertainties. © 2015 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.