By minimizing the costs of reactive power and the system active power loss, the novel ORPF model is proposed.The model is an unfixed and piecewise mixed-integer nonlinear programming problem.

• 建立了以系统有功网损费用与发电机无功辅助费用之和最小为目标函数的无功优化模型，其对应的优化问题是一个具有非固定分段特点的非线性混合整数规划问题。