交直流系统的动态无功优化

Dynamic Reactive Power Optimization of AC/DC System

考虑直流输电系统对功率与电压的调节能力,建立了交直流系统的动态无功优化模型。模型的目标函数为交直流电网的全天网损最小,约束包括交直流系统的潮流约束、所有直流变量的控制约束、离散控制变量动态调节次数约束及节点电压的安全约束。模型求解是一个多时段非线性混合整数规划问题。以混合算法为基础,提出了交直流系统的动态无功优化混合智能算法。以PSASP 36节点系统为例,通过仿真计算验证了所建模型和算法的有效性,说明了动态无功优化在交直流输电网络中具有更大的降损潜力。

Considering the regulating capacity of DC power transmission system to power and voltage, a new model of dynamic reactive power optimization of AC/DC system is proposed. The objective of the model is to minimize all-day network loss of the AC/DC system. Various constraints are taken into account, including power-flow constraints, DC variables constraints in control equations, dynamic constraints of discrete control variables, and security constraints of voltages. It is a multi-period nonlinear mixed integer program problem. Based on the hybrid algorithm, a hybrid intelligent algorithm for dynamic reactive power optimization of AC/DC system is proposed. Test results of modified PSASP 36-bus system demonstrate the efficiency of the proposed model and algorithm, and show that dynamic reactive power optimization has potential in the loss reduction of an AC/DC power transmission grid.