利用模糊建模方法处理可松弛约束的能力，提出一种估计电力系统电压安全成本的新方法。
A new method to evaluate voltage security cost is presented using the capability of fuzzy modeling method in dealing with relaxed constraints.
硬件可以锁起来，但雇员常常觉得这种约束很麻烦，因此安全措施也就松弛了。
Hardware can be kept behind locked doors, but often employees find this restriction a hindrance, so security is lax.
本文利用目标函数和约束函数的线性下界估计，提出一种求(SGP)问题全局解的线性松弛方法。
By utilizing the linear underestimation of objective and constraint functions, a linear relaxation method is proposed for finding global solution of SGP.
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