SMES based a new PID controller for frequency stability of a real hybrid power system considering high wind power penetration

Abstract

This study proposes a coordination of load frequency control (LFC) and superconducting magnetic energy storage (SMES) technology (i.e. auxiliary LFC) using a new optimal PID controller-based moth swarm algorithm (MSA) in Egyptian Power System (EPS) considering high wind power penetration (HWPP) (as a future planning of the EPS). This strategy is proposed for compensating the EPS frequency deviation, preventing the conventional generators from exceeding their power ratings during load disturbances, and mitigating the power fluctuations from wind power plants. To prove the effectiveness of the proposed coordinated control strategy, the EPS considering HWPP was tested by the MATLAB/SIMULINK simulation. The convention generation system of the EPS is decomposed into three dynamics subsystems; hydro, reheat and non-reheat power plants. Moreover, the physical constraints of the governors and turbines such as generation rate constraints of power plants and speed governor dead band (i.e. backlash) are taking into consideration. The results reveal the superior robustness of the proposed coordination against all scenarios of different load profiles, and system uncertainties in the EPS considering HWPP. Moreover, the results have been confirmed by comparing it with both; the optimal LFC with/without the effect of conventional SMES, which without modifying the input control signal. Nomenclature x i max upper limit x i min lower limit 2g/G social factor 1 − g/G cognitive factor best p best light source position ɛ 2 , ɛ 3 random numbers within the interval [0, 1] ɛ 1 random samples were drawn from Gaussian stochastic

Simulation research on the grid connected generation system of solar thermal power generation

“…It solves the problem of large fluctuations after the introduction of interference signals and enhances anti-interference ability. Magdy et al [16] conducted a preliminary investigation on the control scheme of the solar thermal power storage system. They selected Proportional-Integral-Derivative (PID) control strategy to effectively control the system and increase the anti-interference ability of the system.…”

Applying Virtual Inertia Control Topology to SMES System for Frequency Stability Improvement of Low-Inertia Microgrids Driven by High Renewables

“…The significant inherent requirement and constraints (e.g., generation rate constraint (GRC) and governor dead-band imposed by physical system dynamics) were applied in this study based on Reference [5]. Based on References [1][2][3][4][5][6]13,14,21,22,24,25], the dynamic model (depicted in Figure 2) is sufficient for frequency stability study and analysis. The main simulation parameters for the studied microgrid are given in Table 1 [5,14].…”

“…Thus, the power could be released or absorbed to the microgrid as required. The relationship between the DC voltage of the converter and the firing angle is expressed as follows [13,14,24]:…”

Optimized coordinated control of LFC and SMES to enhance frequency stability of a real multi-source power system considering high renewable energy penetration

“…Therefore, the control of power systems can be classified into two fundamental issues. a) control of the active power along with the frequency, b) control of the reactive power along with the voltage regulation [2].…”

“…(ii) this paper proposes a new application of SMES unit as a feedback controller in the aim of supporting the frequency control loops (i.e., primary and secondary frequency controls) for frequency stability enhancement of the studied power system. Where the dynamic structure of the studied SMES model in the previous researches [2,18,20] is too simple and it is preferable to use a more realistic model. Moreover, the inductor current of the studied SMES model slowly returns to its nominal value after a system strike.…”