scholarly journals Coordination of Power-System Stabilizers and Battery Energy-Storage System Controllers to Improve Probabilistic Small-Signal Stability Considering Integration of Renewable-Energy Resources

2019 ◽  
Vol 9 (6) ◽  
pp. 1109 ◽  
Author(s):  
Samundra Gurung ◽  
Sumate Naetiladdanon ◽  
Anawach Sangswang
Keyword(s):  
Renewable Energy ◽  
Power System ◽  
Energy Resources ◽  
Small Signal ◽  
Small Signal Stability ◽  
Renewable Energy Resources ◽  
Power System Stabilizers ◽  
Signal Stability ◽  
Battery Energy ◽  
Power System Controllers

This paper proposes a probabilistic method to obtain optimized parameter values for different power-system controllers, such as power-system stabilizers (PSSs) and battery energy-storage systems (BESSs) to improve probabilistic small-signal stability (PSSS) considering stochastic output power due to wind- and solar-power integration. The proposed tuning method is based on a combination of an analytical method that assesses the small-signal-stability margin, and an optimization technique that utilizes this statistical information to optimally tune power-system controllers. The optimization problem is solved using a metaheuristic technique known as the firefly algorithm. Power-system stabilizers, as well as sodium–sulfur (NaS)-based BESS controllers with power-oscillation dampers (termed as BESS controllers) are modeled in detail for this purpose in DIGSILENT. The results show that the sole use of PSSs and BESS controllers is insufficient to improve dynamic stability under fluctuating input power due to the integration of renewable-energy resources. However, the proposed strategy of using BESS and PSS controllers in a coordinated manner is highly successful in enhancing PSSS under renewable-energy-resource integration and under different critical conditions.

scholarly journals Small Signal Stability of Synchronous Motor-Generator Pair for Power System With High Penetration of Renewable Energy

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 166964-166974 ◽  
Author(s):  
Qianyu Wu ◽  
Yongzhang Huang ◽  
Chenyang Li ◽  
Yujun Gu ◽  
Haisen Zhao ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Power System ◽  
Synchronous Motor ◽  
Small Signal ◽  
Small Signal Stability ◽  
Signal Stability ◽  
High Penetration

scholarly journals Tuning of power system stabilizer for small signal stability improvement of interconnected power system

2017 ◽  
Vol 16 (1/2) ◽  
pp. 3-28 ◽  
Author(s):  
Prasenjit Dey ◽  
Aniruddha Bhattacharya ◽  
Priyanath Das
Keyword(s):  
Power System ◽  
Low Frequency ◽  
Operating Conditions ◽  
System Stability ◽  
Interconnected Systems ◽  
Small Signal ◽  
Small Signal Stability ◽  
Power System Stabilizers ◽  
Signal Stability ◽  
Low Frequency Oscillations

This paper reports a new technique for achieving optimized design for power system stabilizers. In any large scale interconnected systems, disturbances of small magnitudes are very common and low frequency oscillations pose a major problem. Hence small signal stability analysis is very important for analyzing system stability and performance. Power System Stabilizers (PSS) are used in these large interconnected systems for damping out low-frequency oscillations by providing auxiliary control signals to the generator excitation input. In this paper, collective decision optimization (CDO) algorithm, a meta-heuristic approach based on the decision making approach of human beings, has been applied for the optimal design of PSS. PSS parameters are tuned for the objective function, involving eigenvalues and damping ratios of the lightly damped electromechanical modes over a wide range of operating conditions. Also, optimal locations for PSS placement have been derived. Comparative study of the results obtained using CDO with those of grey wolf optimizer (GWO), differential Evolution (DE), Whale Optimization Algorithm (WOA) and crow search algorithm (CSA) methods, established the robustness of the algorithm in designing PSS under different operating conditions.

scholarly journals Small-Signal Stability Analysis for Power System Frequency Regulation with Renewable Energy Participation

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Tingyi He ◽  
Shengnan Li ◽  
Shuijun Wu ◽  
Ke Li
Keyword(s):  
Renewable Energy ◽  
Stability Analysis ◽  
Power System ◽  
Wind Farm ◽  
Voltage Drop ◽  
Frequency Regulation ◽  
Small Signal ◽  
Small Signal Stability ◽  
Signal Stability ◽  
Small Signal Stability Analysis

With the improvement of the permeability of wind and photovoltaic (PV) energy, it has become one of the key problems to maintain the small-signal stability of the power system. Therefore, this paper analyzes the small-signal stability in a power system integrated with wind and solar energy. First, a mathematical model for small-signal stability analysis of power systems including the wind farm and PV station is established. And the characteristic roots of the New England power system integrated with wind energy and PV energy are obtained to study their small-signal stability. In addition, the validity of the theory is verified by the voltage drop of different nodes, which proves that power system integrated with wind-solar renewable energy participating in the frequency regulation can restore the system to the rated frequency in the shortest time and, at the same time, can enhance the robustness of each unit.

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