الفهرس 
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Abstract
Today, electricity is very important in our life for our activities, lighting, factories, air conditioning, irrigation, refrigerators, etc. utility will be subjected to a lot of problems. So, electric utilities search for a method to provide customers with the electric energy demand with a reasonable level of reliability and economically as possible. Demand-side management is an important consideration for electric power utilities, in order to control using of electric power.
Demand-Side Management (DSM) programs consist of the planning, implementing and monitoring the activities of electric utilities which are designed to encourage consumers to modify their level and pattern of electricity usage.
The goal of this thesis is to determine the impact of DSM on the power system load curve and on the power system reliability. Different DSM programs will be applied on the power system load curve of IEEE Reliability Test System (IEEE-RTS). Valley Filling method, Energy Conservation method, Peak Clipping method, Load Shifting method and Load Building method will be used to evaluate their effect on the hourly load curve. Different DSM will be applied on the Egyptian will be used to evaluate their affection the hourly load curve. Different DSM program will be applied on the Egyptian electricity power system to determine the effect of DSM programs (only four methods) on maximum annual day load profile and determine the effect of DSM on the total system cost and planning reserve margin.
In this study, MESSAGE program will be used to calculate total system cost of the Egyptian electric power system which consists of 89 generation stations. The total system cost (fixed, variable and investment cost) will be calculated for the Base Case, then DSM programs will be applied (Energy Conservation, Valley Filling, Peak Clipping, Load Shifting and) on the Egyptian electric power system in each year for all cases. Also planning reserve margin will be calculated in each year for the base case and with DSM programs. Planning reserve margin will be calculated as a percentage of the total installed capacity. Average annual reserve margin will be calculated for each case of the plan. Also, average growth rate of peak load will be calculated for each case of the plan.
Total capacity added in each year will be calculated for Base Case and four DSM programs of the Plan.