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| Research on emergency control method considering severity of overheating of overload line |
| DOI：10.19783/j.cnki.pspc.181135 |
| Key Words:emergency control heat accumulation limit value power sensitivity matrix minimized economic compensation particle swarm optimization |
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| Abstract:The existing emergency control algorithm doesn’t consider the limit of generator adjustment speed when developing the emergency control scheme, and can’t flexibly adjust the control scheme according to the overload degree of the overload line, which may cause the practicality of the emergency control scheme poor, therefore, a method that takes into account the severity of the heating of overload line is proposed. Firstly, the heating model of the overload line in control process is established, and the heat accumulation limit value of the overload line is defined to describe the dispatcher's expectation to eliminate the line overload. Secondly, on the basis of power sensitivity matrix, active power circulating on the overload line is adjusted with the output of the generator and the load-cutting and cutting machine, so as to realize the calculation of the heat of the overload line during control period. Finally, with the goal of minimizing economic compensation, an optimization model is established, and the model is solved by simulated annealing particle swarm optimization. The obtained scheme can utilize the advantages of low cost of adjusting the output of the generator and short time of cutting the load and the generator, which has stronger practicability. The correctness and superiority of this method are verified in the IEEE39-node system. This work is supported by National Key Research and Development Program of China (No. 2018YFB0904700) and National Natural Science Foundation of China (No. 51777132). |
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