Optimal Configuration Of Sectional Switches In Distribution Networks Considering Reliability And Economy

With the substantial increase of power demand of various loads,users have higher and higher requirements for the reliability and economy of power supply.The reasonable configuration of sectional switch in distribution network can improve the reliability and economy of the system by reducing the fault range and fault isolation time.Therefore,it is necessary to put forward the optimal allocation method of sectional switches in distribution network considering reliability and economy.Firstly,this study analyzes the correlation between sectional switches and topology,establishes the 0-1 integer decision variable matrix,analyzes the component reliability parameters in the historical operation of distribution network,and puts forward the reliability parameter prediction model of sectional switches.The prior information of segmented switches with different operation means is sampled.Under limited measurement conditions,the real network topology is successfully inferred with high probability,the matrix category is accurately divided,and the loss caused bu network and switch failure is concretized.The pre-selection scheme of switch configuration obtained by switch configuration obtained is modified by Matlab simulation program of Monte Carlo method.The proposed topology identification method accurately reflects the working state of the switch,carries out reliability and economic analysis combined with the switch fault loss,avoids complex fault event enumeration and repeated fault influence range serch,saves a lot of calculation time while ensuring the accuracy of parameters,and realizes the global optimization of selection switches in distribution network,so as to ensure the maximization of economic investment and system reliability.The optimal configuration of section switches in medium voltage distribution network with many branches,long lines and complex structure is much more complicated.Putting forward the optimal configuration method of section switches with faster optimization speed is very important for the construction and transformation of complex distribution network: Firstly,the relationship between the topology of distribution network and the state of sectionalized switch is analyzed.Considering the reliability and economy of distribution network power supply,the objective function is constructed with the goal of minimizing outage loss;Then,based on the life cycle cost theory,the optimal configuration model of section switch considering power supply reliability is proposed;By analyzing the average outage duration and outage loss cost of the upstream,midstream and downstream networks of the switch,a comprehensive iterative solution strategy considering reliability and economy is obtained;Finally,in order to ensure simple parameter adjustment and fast convergence speed in the optimization process,an iterative solution method method based on binary particle swarm optimization is proposed to configure the number and position of sectional switches.The simulation example of medium voltage distribution network in an oil field proposed in this paper verifies the effectiveness and advantages of this method,which provides a practical reference for power grid planners in distribution network optimization design.