Since ELD problem belongs to a kind of multidimensioned, discrete, nonlinear constrained numerical optimization problem, so the key of solving ELD problem is to find an effective numerical optimization algorithm. 由于该问题可归为一类高维、非线性、多约束的函数优化问题,因此寻找一种高效的函数优化算法成为了求解这类问题的关键。