考虑交直流博弈的混合电网网损优化研究

Network Loss Optimization of AC/DC Hybrid Power Grid Based on Game Theory

随着高压/特高压直流输电逐渐成为区域电网互联的主要方式,交直流混合电网的网损优化问题已成为需要关注和解决的重要问题。首先以直流输电线路自身的利益和送受端系统内部的网损最小为不同博弈方,建立了交直流混合电网的主从博弈优化模型。将交直流电网的博弈模式分为4种情况,分析了不同博弈模式下直流线路的功率分配情况和无功优化方案及其对各方利益及全网网损的影响。然后,基于改进粒子群算法(MPSO)来确定不同博弈模式下的直流功率分配情况及无功优化方案,并对比了有功调度和无功优化对交直流混合电力系统降损程度的影响。最后,通过2个以直流线路相连的IEEE9节点系统验证所提出模型和算法的有效性。

With the high-voltage/ultra-high voltage direct current transmission（ HVDC/UHVDC） becoming the main way of regional power grid interconnection,the loss reduction of AC/DC hybrid power grid has become an important subject which needs to be concerned. In view of the situation mentioned above,a Stackelberg game optimization model of AC/DC hybrid power grid is established in this paper firstly,which takes the interest of DC transmission lines and network loss of sending-end and receiving-end as different players. The four possible game modes of AC/DC hybrid system are discussed. Secondly,the power distribution of DC transmission lines and reactive power optimization schemes under different game modes is analysed,and its effects on the interests of all parties and the loss of the whole network are evaluated. Then,a modified particle swarm optimization（ MPSO） algorithm is proposed to determine the power distribution of DC lines and reactive power optimization schemes of the sending-end and receiving-end. The effect of active power dispatching and reactive power optimization on the AC/DC hybrid power system are compared afterwards. Finally,the validity of the proposed model and algorithm is verified by two IEEE 9-node systems which are connected by DC transmission lines.