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In this paper, virtual inertia control (VIC) is suggested to increase the frequency stability in islanded microgrid (MG) clusters. The aim of the suggested control method is to improve damping characteristic of MG clusters including different distributed generations (DGs). The optimal/robust values of the VIC parameters are tuned by aμ-synthesis robust control method. The proposed robust/optimal VIC-based control method is confirmed by various scenarios. Computer simulation and hardware-in-the-loop (HIL) tests are used to show the effectiveness of the suggested method in increasing the damping of the power system. Clearly, different characteristics of the dynamic responses and the results show the practicality of the suggested robust VIC.e

The consumption of gas for thermal power plants is prioritized due to economic efficiency, in terms of reducing the costs of operation and repairs of power plant units, increasing the reliability of operation and reducing environmental consequences. Measuring and knowing the exact amount of gas consumption and calculating the efficiency of power plants in these sensitive conditions, by various types of precision instrument flow meters, is one of the main challenges. The main purpose of this research is to fully describe the installation and operation of gas flow meters according to the ISO-5167 standard located in the Ahvaz Ramin Power Plant, as well as to review and study their efficiency, using real operating data, which Validation and effectiveness, a comparison has been made between orifice plate flow meters used in gas units with turbine flow meters in CGS pressure reduction station and power plant gas station, which are widely used in various industries. The results show that the values of orifice plate flow meters have higher accuracy and accuracy, as well as less failure, and the maintenance costs of these flow meters are much lower than the turbine type, and the installation of this method is easier.

Measuring and observing the local level of industrial reservoirs is always considered one of the most important issues in all industries, to the extent that different methods are used in the field of precision instruments. On the other hand, with the passage of time, due to the wear and tear of old local level gauges and the lifespan of their parts, these devices are always faced with a decrease in measurement accuracy as well as an increase in equipment failure and inefficiency. The focus of this article is on the local measurement of the level, compared to the centralized measurement located in the control room. The results show that, in addition to the local reading of the tank level by the operators, it is possible to send signals and monitor the values in the control room. Currently, a number of magnetic level gauges have been successfully installed and operated on oil tanks, high pressure heaters, deaerators and boilers in Ahvaz Electricity Production Management Company - Ramin Power Plant. For confirmation and validation, the results of this research were compared with two samples of pressure difference gauge and Borden tube pressure gauge. Simplicity and ease of installation and the ability to display high-resolution local and send electrical signals to the steering room are the main features of the magnetic level gauge.