求翻译：在反复求解一系列常规潮流方程时其功率注入方向向量也由人为指定，对各个潮流点进行校验的安全稳定约束集也没有明确规定。是什么意思？

General trend in repeated series of equations to solve the power injected into the direction of the vector is specified by the man-made, all trends point to check on the safety and stability are not clearly defined set of constraints.

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When solves a series of conventional tidal current equation repeatedly its power pours into the direction vector also by to assign artificially, carries on the verification to each tidal current spot the security stable restraint collection also not to have to stipulate explicitly.

In repeatedly solving a series of routine power flow equation of power injection vector in the direction specified by the people, on various trends point to validate the security and stability of constraint set is not specified.

General trend in repeated series of equations to solve the power injected into the direction of the vector is specified by the man-made, all trends point to check on the safety and stability are not clearly defined set of constraints.