Currently

the decomposition-coordination algorithms used in optimal power flow(OPF)lack a unified basis for comparison. For this reason

the seven kinds of decomposition-coordination algorithm are used for solving the same power system so as to get more objective and fair conclusions. The decomposition-coordination optimal power flow algorithms based on the modern interior point theory are divided into 4 categories by using the area partition method

with the model and calculation process of each algorithm briefly described. The 4 categories are the bus splitting method

the overlap boundary method

the boundary-area partition method and the node decomposition method. In order to fully compare and analyze the performance of the 7 algorithms

2-region 600-bus and 4-region 1 200-bus systems are constructed as test cases based on an IEEE 300-bus system. Calculation results are obtained by means of vector programming

and then a comparison of the convergence

calculation speed

the amount of communication and stability is conducted. Finally

based on the MATLAB parallel laboratory

the parallel performance of each algorithm is tested. Test results show that the approximate Newton direction(AND)method has better performance in terms of calculation speed and amount of communication

while the convergence and stability of the decomposition coordination interior point method(DCIPM)is better than the other algorithms.