Active and Reactive Cooperative Optimization of Improved Quasi-linear Relaxed Distribution Network Considering Source-Load Correlation
With the high proportion penetration of distributed power sources,the stability of active distribution network is greatly affected,so the active power and reactive power cooperative optimization of active distribution network is very im-portant.In this paper,a Quasi-linear contraction(QLC)method for active and reactive power cooperative optimization of distribution network is proposed.First based on the correlation analysis method,the correlation degree of new energy out-put and load is analyzed,and the probability constraint of source-load correlation is given to improve the system optimiza-tion model.In view of the problem that the non-convex nonlinearity of the optimization model is easy to lead to local opti-mal solutions,the Taylor expansion is used to solve the upper and lower bounds of the branch currents and substitute them into the node voltage and power flow equations to complete the quasi-linear contraction of the active distribution net-work model.Then the penalty method is adopted,and the actual optimal solution is achieved.When the obtained solution is on the tight constraint boundary,the actual optimal solution is obtained by external optimization under the premise of satisfying original constraint range.Finally the stability,accuracy and effectiveness of the proposed method are verified by simulation calculation software such as Yalmip.
distributed power sourcesource-load correlation degreequasi-linear contractionpower qualityactive net-work loss
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