In view of such issue as determining reactive power compensation point and reactive power compensation capacity in the reactive power compen s ation

in this paper

a kind of re active power optimiz ation method based on singular value decomposition and multi-strategy adaptive particle swarm optimization（IS-APSO） algorithm is proposed.Firstly

the weak node of voltage stability is taken as reactive power node based on the singular value decomposition in the power flow c alculation;then the reactive power compensation is optimized with minimum active power loss of line and node voltage deviation and maximum node stability as target.For solving such problem as reduction of convergence speed of algorithm and reduction of diversity of particle swarm in the later period of the optimization

MS-APSO algorithmis proposed to effectively seek optimal solution.The influence of diversity of particle swam

inertia weight

over-limit reset and mutation is considered comprehensively

which improves effectively the convergence rate of the algorithm at earlier stage and optimization ability at later stage.Finally

the effectiveness of the improved algorithm is verified in IEEE 118 calculation.It is shown by the result that the loss reduction rate of algorithm after improvement

compared to the traditional method

can improve by 38.6%.