Modelling stability improvement in Kazakhstan's power system by using battery energy storage

Kazakhstan is going to increase the share of RES up to 10% until 2030 and up to 50% until 2050. The current share of RES is 3% and BESSs are not used. This paper analyzes the simplified national power grid and the ability of BESS participation in frequency regulation in accident loss of generation on one of the stations. The results show that BESS only is not enough to keep frequency in desirable restrictions

Asymmetric operation of Power Networks, state of the art, challenges, and opportunities

The asymmetric operation is a method that allows High and Extra-High Voltage (HV, EHV) power lines to function with one or two phases open. With the increasing share of Renewable Energy Sources (RES) in National Power Systems (NPS), they are becoming more volatile and less reliable due to decreasing inertia and other issues related to the integration and exploitation of the Inverter-Based Resources (IBR) (decreasing short-circuit ratio, different types of interactions, etc.). On the other hand, phase-to-ground faults are a common cause of tripping off power lines which affects the overall reliability of the power system. Thus, for power systems experiencing a decreasing trend in reliability and robustness, the asymmetrical operation of the power lines may enhance them. In this way, this article reviews the state of the art and new developments in the academic landscape regarding asymmetrical operation. The review is not, however, limited to HV and EHV systems, so it examines cases of asymmetric operation in Low and Medium Voltages (LV, MV) as well. The challenges and opportunities that this unique mode of operation imposes on power networks are also presented, providing a fresh reference for researchers looking to enter this topic

Asymmetric operation of power lines by using E-STATCOM and internal model controllers

Asymmetric operation of power lines offers the possibility to retain some degree of power flow with a tripped off phase. This paper presents a E-STATCOM-based control methodology to enable asymmetrical operation of power lines using internal model controllers. Additionally, an analysis of ground current implications is carried out to assess the practicality of the proposed solution. The control methodology and performance of the system is validated via simulations and further conclusions are drawn regarding the implications of using this approach to operate transmission lines in power systems

Topological algorithm to form power of compensating devices of distribution networks

Effectiveness of providing consumers with technical limits of voltage deviation relates with integrating digital technologies in automation voltage regulation control. Automatized compensating devices, intended control voltage, tunes without consideration of influence of other compensating devices installed for the same purpose. It leads to their energetical efficiency deterioration. Thus, there is a need to develop new algorithms needed power of compensating devices