基于回溯法环网助增系数计算方法的研究

Research on calculation method of auxiliary increasing coefficient in high-voltage ring network based on backtracking method

随着高压电网结构的日益复杂,大小环网互相交错的情况屡见不鲜,这使得继电保护的整定计算越来越复杂,尤其是计算定值需要满足各种运行方式,而助增系数的计算结果受运行方式的影响极大,因而搜索极端运行方式是定值整定计算的重中之重。针对现有高压环网的特点,提出了一种基于回溯算法计算助增系数的方法,通过对保护支路的回溯搜索可得到不同级数的环网,全面考虑不同级数环网各种恶劣运行方式下的助增系数,并通过算例与传统助增系数计算方法的计算结果进行了对比,得出基于回溯算法能够快速准确地找到更为极端运行方式下的助增系数,最后通过实例电网验证了该算法的有效性,并对该算法的复杂度进行了分析,验证了其快速性。

With the increasingly complex structure of high-voltage power grids,the size of the ring network staggered situation is common,making the overall protection of the more complex calculation,especially the calculation of the value of the need to meet a variety of operating methods,and the calculation of the auxiliary increasing coefficient is very important in the calculation. In this paper,the characteristics of the existing high-voltage ring network,proposed a backtracking method of calculating the auxiliary increasing coefficient in ring network,through the protection of the ring circuit search can be different series of ring network,a comprehensive consideration of different series ring network of various harsh running and compared with the traditional calculation auxiliary increasing coefficient method. It is concluded that the backtracking algorithm can quickly and accurately find the auxiliary increasing coefficient of the more extreme operation. Finally,the effectiveness of the proposed method is verified by an example of the grid,and the complexity of the proposed method is analyzed,and the speediness of the proposed method is verified.