The goal of a load flow study is to obtain complete voltage angle and magnitude information for each bus in a power system for specified load and generator real power and voltage conditions. Due to the nonlinear nature of this problem, numerical methods are employed to obtain a solution. The solution to the power flow problem begins with identifying the known and unknown variables in the system. The known and unknown variables are dependent on the type of bus. A bus without any generators connected to it is called a Load Bus. In the power flow problem, it is assumed that the real power PD and reactive power QD at each Load Bus are known. For this reason, Load Buses are also known as PQ Buses. a bus with at least one generator connected to it is called a Generator Bus. For Generator Buses, it is assumed that the real power generated PG and the voltage magnitude |V| is known. The exception is one arbitrarily-selected bus that has a generator. This bus is referred to as the Slack Bus. For the Slack Bus, it is assumed that the voltage magnitude |V| and voltage phase Θ are known. Therefore, for each Load Bus, both the voltage magnitude and angle are unknown and must be solved for; for each Generator Bus, the voltage angle must be solved for; there are no variables that must be solved for the Slack Bus. There are several different methods of solving the resulting nonlinear system of equations. The most popular is known as the Newton-Raphson Method. This method begins with initial guesses of all unknown variables (voltage magnitude and angles at Load Buses and voltage angles at Generator Buses). This method u have already studied in numerical methods.
for more details u can refer any book of power system analysis
Thanks for posting this code...it's excellent and very generic! I was browsing through it and just wanted to confirm,if I replace the line and branch data with that of the IEEE 14 bus system, the program will work as intended?
boss can you post a tutorial on how to do load analysis.
ReplyDeletethese programs actually used for load flow analysis what else do u want to know?
Deletei wanted to know what is load flow analysis, why it is done and how it is done using such programmes
DeleteThe goal of a load flow study is to obtain complete voltage angle and magnitude information for each bus in a power system for specified load and generator real power and voltage conditions. Due to the nonlinear nature of this problem, numerical methods are employed to obtain a solution.
DeleteThe solution to the power flow problem begins with identifying the known and unknown variables in the system. The known and unknown variables are dependent on the type of bus. A bus without any generators connected to it is called a Load Bus. In the power flow problem, it is assumed that the real power PD and reactive power QD at each Load Bus are known. For this reason, Load Buses are also known as PQ Buses.
a bus with at least one generator connected to it is called a Generator Bus. For Generator Buses, it is assumed that the real power generated PG and the voltage magnitude |V| is known.
The exception is one arbitrarily-selected bus that has a generator. This bus is referred to as the Slack Bus. For the Slack Bus, it is assumed that the voltage magnitude |V| and voltage phase Θ are known. Therefore, for each Load Bus, both the voltage magnitude and angle are unknown and must be solved for; for each Generator Bus, the voltage angle must be solved for; there are no variables that must be solved for the Slack Bus.
There are several different methods of solving the resulting nonlinear system of equations. The most popular is known as the Newton-Raphson Method. This method begins with initial guesses of all unknown variables (voltage magnitude and angles at Load Buses and voltage angles at Generator Buses). This method u have already studied in numerical methods.
for more details u can refer any book of power system analysis
Hi Abhishek,
ReplyDeleteThanks for posting this code...it's excellent and very generic! I was browsing through it and just wanted to confirm,if I replace the line and branch data with that of the IEEE 14 bus system, the program will work as intended?
Thanks,
Shehezaada