考虑电压约束裕度的无功优化新模型

传统无功优化算法的目标函数一般为满足电压限制下的有功网损最小,未考虑电压的"软约束"特性,这通常会使得优化后的系统部分母线电压非常接近其合格范围的边界,成为系统安全运行的隐患。针对无功优化问题的这些特点,本文基于模糊集理论建立了带有模糊安全约束的无功优化模型,并采用非线性原-对偶内点法求解。算例的结果表明,该模型能够有效降低系统的网损并保证节点电压留有一定的安全裕度。

Reactive Power Optimization Model for Voltage Constraint Margin

Objective function of a traditional reactive power optimization method is usually expressed as that minimizing the active transmission power loss under rigid voltage constrains, but neglects the soft characteristics of voltage constrains. It can make the voltage of some bus close to its boundary, thus becoming potential trouble of system security. To solve this problem the reactive power optimization model based on fuzzy theory is carried out. The model with fuzzy operating security constrains applies nonlinear primal-dual interior-point method. The simulation result of test system shows that the proposed model can reduce the decrement of transmission losses and greatly extent security margin of voltage.