Load Frequency Control of Three area Multi-Unit Deregulated Power System with FOSMC and Performance analysis using Regulation constant

This paper presents three area multi-unit Deregulated Power System (DPS) for Load Frequency Control (LFC) using Fractional Order Sliding Mode Controller (FOSMC) along with Thyristor Controlled Phase Shifters (TCPS) and Superconducting Magnetic Energy Storage (SMES) combination. The FOSMC can be used to overcome nonlinearities and uncertainties of the system for bilateral and unilateral transactions under different Step Load Perturbations (SLPs). The deregulated power system performance is analyzed for different Regulation constants (R) such as 1.8, 2.4 and 3.0. For stabilization of oscillations in frequency and to stabilize the deregulated power system dynamically for different SLPs, TCPS is incorporated with the tie line in series and SMES is used as an energy storage unit. The dynamic responses of LFC problems have been simulated and analyzed with MATLAB/Simulink-based computer simulations. Further simulation results have also been tabulated as a comparative performance with respect to peak overshoot and settling time.&nbsp

Stabilized α-Ni(OH)2 as electrode material for alkaline secondary cells

Hydrotalcite-like compounds of formula Ni1-xAlx(OH)2(CO3)x/2·nH2O (x = 0.1 to 0.25), having the same structure as that of α-Ni(OH)2, have been synthesized by substituting nickel hydroxide with aluminum. Of these, the compounds of compositions xâ¥0.2 are found to have prolonged stability in strong alkaline medium. The electrodes comprising stabilized α-Ni(OH)2 of x = 0.2 composition are rechargeable with discharge-capacity values of 240 (±15) mAh-g-1 and are attractive for applications in various alkaline secondary cells employing nickel-positive electrodes