理论上分析了该方案利用自相位调制(SPM)效应产生均衡作用的基本原理，指出了该方案所能达到的最佳均衡指标。

The operation principle based on self-phase modulation (SPM) effect is explained and the best achievable performance is given from the analysis results.

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设计目的是取得在成本代价、负载均衡、等待时间以及系统效率等综合指标上的优化。

The design goal is to obtain some better comprehensive targets, such as cost price, load balance, waiting time and efficient of systems.

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模拟结果同时证实，除非水均衡误差也相当小，否则水头变化收敛指标较小时收敛的计算也不能保证计算结果有可靠的精度。

Verified by simulation results reliable accuracy of calculated results can not be guaranteed for small head change convergence index unless the error of water balance is small too.

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