The Effect Of Charging Empty Transmission Lines On The Performance Of Network Reconfiguration Following Large-area Blackout

Power system black-start is the power system due to failure resulting in full-stop after starting the system using its own ability to achieve and then start the recovery process.Units start to go through this process, no-load line charging, load into various stages.Therefore,black-start program development and implementation of systems related to various issues, their implementation must be enacted before the appropriate recovery plan.After the blackout reconstruction plan according to the transmission grid to grid operation to reconstruct the process, but also to a large number of no-load overhead lines into operation, due to uncertainties in the line operation may cause the line voltage level exceeds the limit over,delay the recovery process.Therefore, the black-start no-load line over-voltage switch on the issue of concern is a must. The paper first line in the ATP environment to build the model and no-load circuit after power failure during charging operation of the line over-voltage problems caused by a simulation study, and then closing the line for the impact of over-voltage of the main factors, using the MATLAB programming called ATP method of simulation models developed during the closing black-start the simulation over-voltage program for black-start the process of validation is not the same hollow-charge step, different number of transmission lines caused by the problem of over-voltage switch.On this basis, proposed the use of Monte Carlo method to calculate the load line after the blackout closing overvoltage failure rate.The use of simulation and programming the simulation model is called the method of combining the development of black-start the process of closing over-voltage checksum calculation and statistical analysis programs for the statistical information is difficult to use historical statistics of Reconstruction in the grid when the hollow charge for each transmission line different steps of the full line rate in case of line failure. Finally, the IEEE30node system, for example, recovery of grid reconstruction is not the same hollow-charge circuit failure rate for the next step statistical analysis.Grid-based reconstruction of the final recovery plan put into operation in the failure rate of the line to start the shortest time for the target to establish the maximum capacity of the units function, the application of particle swarm optimization and cross-shortest path algorithm as a great power grid reconstruction after the optimization algorithm, reconstruction to restore order to the grid optimization. After the blackout with no-load line charging lead line and put into operation after the failure of the reconstruction grid effect, so as to IEEE30node system as an example analysis shows. This research method for the recovery plan provides an effective development assistance.