基于虚拟控制单元与启发式搜索的线路过载紧急控制策略

发布时间：2018-07-13 18:35

【摘要】：为了快速消除由潮流转移引起的线路过载,给出了基于虚拟控制单元与启发式搜索的紧急控制策略。首先,引入虚拟控制单元的概念:节点的出力调整量等于最大线路过载量时,能够完全消除线路过载的控制单元。然后,给出了最优可控单元的双层搜索策略:第一层,通过设置合理的阈值,筛选减载能力较强的控制节点对构成优先控制单元集;第二层,综合考虑控制单元的减载效果和消除过载能力,给出了基于虚拟控制单元的启发式搜索步骤,得到优先控制单元集中的最优可控单元。若所选的阈值范围内无法找到可控单元,则适当扩大第一层搜索范围,依次类推,直至得到满足要求的控制单元。考虑正常线路冗余量约束来计算调整量,避免了潮流校验。经过一次调整后,依据灵敏度关系修正线路潮流与节点的最大可调整出力,提高控制速度。IEEE 30节点系统的仿真验证了所提算法的有效性。
[Abstract]:An emergency control strategy based on virtual control unit and heuristic search is proposed to eliminate the overload caused by power flow transfer. Firstly, the concept of virtual control unit is introduced: when the output adjustment of the node is equal to the maximum line overload, the control unit can completely eliminate the line overload. Then, the two-layer search strategy of the optimal controllable unit is given. In the first layer, by setting a reasonable threshold, the control node pairs with strong load reduction ability are selected to form the priority control unit set, and the second layer, Considering the effect of load reduction and the ability of eliminating overload, a heuristic search procedure based on virtual control unit is presented, and the optimal controllable unit in priority control unit set is obtained. If the controllable unit can not be found in the selected threshold range, the first layer search range is expanded appropriately, and then the control unit can be obtained until the required control unit is obtained. Considering the normal line redundancy constraints, the adjustment quantity is calculated, and the power flow check is avoided. After one adjustment, the efficiency of the proposed algorithm is verified by modifying the line power flow and the maximum adjustable output force of the nodes according to the sensitivity relationship, and improving the control speed. The simulation of the IEEE 30-bus system verifies the effectiveness of the proposed algorithm.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);
【基金】：国家自然科学基金资助项目(50837002)~~
【分类号】：TM73

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