الفهرس 
Enhancing distribution system by CBs & DGs on medium voltage and low voltage.
Grasshopper Optimization AlgorithmOnly 14 pages are availabe for public view
 |  | from | 111 |  |  |
| | | from | 111 | | |
Abstract
There are a lot of obstacles in front of the electrical traditional systems in the last years like unreliability caused by repeated service outage due to lines overloading, poor voltage regulation and poor efficiency. Power consumption is rising up in many countries because of economic and industrial investments. So, electrical power authorities are working to provide reliable electrical energy. Nowadays, it is found that the growth of the electric power demand is more than electric energy generation because of the constraints in cost of electricity production. As well, adding new transmission lines and old techniques of rehabilitation have a lot of problems such as excessive cost and ageing of existing distribution and transmission networks. This thesis presents two methodologies to solve the problems of the traditional distribution systems. The first methodology is to enhance the distribution system by using capacitor banks (CBs) or distributed generators (DGs). This addition of the devices may be on the medium voltage side or in the low voltage side. In this thesis, a comparison has been made between adding the capacitor banks and distributed generators on the low voltage side or on the medium voltage side to find out the most suitable value and locations in the distribution system to optimally enhance the distribution system. The grasshopper optimization algorithm (GOA) technique has been used to verify the objective functions needed for system enhancement and achieve the constraints of voltage regulation and maximum power injected to the distribution system. As well, a practical cost comparison has been done to find out which devices on which voltage level side will be more economical than the other. The second suggested methodology is the demand side management (DSM) which provides another solution for an old and heavily loaded Egyptian distribution systems. The DSM has two styles, direct control or indirect control. The direct one is to control the loads by switching them off or on to optimize the power flow in the distribution system and to shave the load peak power in the peak periods, which conflict with consumer requirements. In the indirect technique, the operators of the system encourage the consumers to reduce their consumption in peak periods or to shift the consumption on other un-peak periods with lower bill than the normal consumer pays. But there are obstacles to satisfy the consumers with reducing the power consumption in peak periods that have been investigated in this thesis and how to introduce a comfortable operation using the GOA technique for an integrated direct/indirect load management. In brief words, this thesis introduces smart and efficient enhancement techniques to improve the performance of conventional distribution systems.