نشریه تحقیقات نوین در سیستم های قدرت هوشمند
سال ششم شماره 1 (پیاپی 13، بهار و تابستان 1396)

The benefits of wind power generation have led to an ever-increasing expansion of wind farms around the world. The low cost of production and the environmental benefits of wind farms are some of the main reasons for using wind energy. On the other hand, uncertainty costs in the production and control of the output of wind turbines are among the problems that are being encountered for electricity operators and markets. One of the basic measures to increase the penetration of wind power is to study the effects of this penetration on the restructured power grids. In this study, the effects of wind power plants on the market price and power system reliability in generation sector is evaluated in the one-year period.  The proposed method is tested on IEEE-RTS 24 bus network and it will be tried to obtain more realistic results compared to the market and reliability of the network, taking into account the different Reserves percentage and price elasticity of demands. In simulations, the effect of network reservation uncertainty is considered. Also, Monte Carlo simulation is used for wind modeling. This study attempts to compare the results of adding and replacing wind power producers in the grid to assess the changes in the system reliability and market efficiency. The results indicate a positive effect of concurrency of allocation of reserves and proposed schemes on reliability and market efficiency.

In this paper, some Contents are presented to simulate the nonlinear converter of the Buck converter. In general, the Buck converter and studies done on it and a control method to obtain the average output voltage for equality with an optimum level, Provided control method includes a series of advantages and disadvantages. To improve disadvantages And also a better result on the output The linear controller (PI) is introduced and to improve the disadvantages as well as the better result And obtaining the output voltage With a constant surface and a decrease in the Ripple and the time of the voltage collapse in line Controller Converter (PI) output is introduced Which is combined with non-linear control (slider control) And simulated in the mathematical environment and its results are visible.

Nowadays the combined power generation system has become one of the most promising solutions to address the power needs of different regions. Given the discontinuity of energy produced by renewable sources a proven practice of combining these renewable energies can be a good solution for generating electricity in different atmospheric conditions, and with an appropriate combination of these sources an affordable production system can be achieved. In this research the village of Souqand was surveyed in the central part of Neyshabour city. Demand for power consumption has been provided by 20.63 kWd since 1381 .Which feeds the scattered loads of the area. In this research considering the proper position of the village in terms of climate conditions and also the efforts to improve the economic and environmental conditions of the region in the future we will examine the role of the addition of distributed generation resources to the network, and we conclude that using these resources will reduce the cost to 57% and reduces the amount of pollutants to 70%. This paper was reviewed in two scenarios and the results of selecting an optimal system have been developed.

Energy efficiency of power plants is less than 60% However, the efficiency of the CHP units can be up to 90 %.CHP units in addition to high efficiency, They reduce environmental pollutants by 13 to 18 percent. The purpose of this thesis is to use the simultaneous power and power generation plants to reach the optimal economic destination for Genco And to maximize economic profit And to minimize environmental releases based on the integration of CHP systems with conventional heat generating units on the power grid The Crow Search Optimization algorithm (CSA) is used to solve the economic load distribution problem (CHPED) And the problem of the economic load distribution (CHPEED) as well as the problem of economic load distribution with the participation of electricity services market in MATLAB software simulation and its results for all three modes are presented. The proposed method is used for ten power plants with different characteristics with variable load The results of the Csa approach for optimization based on comparison with the results of the Ant colony algorithm as well as other algorithms considered in other studies are valid. When the CHP units are integrated with the integrated system of 10 TG, the results of the implementation of the proposed approach are very promising.

Correct and timely maintenance of power lines and substations has an important impact on the operation and optimization of the production cycle and distribution of electricity. In this way, proper and timely maintenance and repair of these lines can reduce losses, sudden defects, and thus reduce and optimize consumption. One of the most important components of transmission and distribution networks and substations are insulators. Reduce of insulation level and failure of insulators due to leakage flow can be considered a serious problem for power network and have a great impact on its efficiency. Due to formation of sediments at insulators surface, reduction of the level of insulation is an important problem, resulting in a decrease in the efficiency of the network and subsequent interruption. In this paper, the ultrasonic wave propagation technique is proposed with the help of a new sedimentation solution as a safe and effective way to remove deposition of insulators, especially in climates with high dust and moisture. In order to measure the affectivity of the proposed method, an insulator containing hard metal-contained deposits, from the Khuzestan area near a cement factory, has been washed in three steps. The results of the washes with the help of the base and complementary solution indicating that the proposed method is completely successful for washing the sample, showing that all the sediments completely separated from the insulator surface.

The loss of balanced voltages involves a voltage drop due to symmetric three-phase errors, or the initiation of high-power three-phase loads or symmetric three-phase switches. While these events in an unbalanced way lead to asymmetric voltage drops. Voltage drops can cause asymmetric load on the power grid, the occurrence of volatility, and even network power outage. One of the most common ways of dealing with voltage drop is the use of power electronics devices in sensitive feeders of distribution networks. In this research, dynamic voltage restorer is used. In order to avoid this voltage drop, optimal PID, fuzzy and fuzzy controllers are the controllers that this article intends to implement and compare their results.