CAJ | 학술논문

为考虑不同控制方式下直流系统对交流潮流的影响，采用顺序求解法计算交直流系统潮流时，对交流系统雅可比矩阵的特殊节点元素进行了有效修正。将电压稳定局部指标三进行合理简化，简化后的三指标能够避免电压相量复数运算，有效提高了计算速度。在简化的三指标基础上，提出了计及电压稳定性约束的交直流系统可用输电能力优化模型。采用非线性原一对偶于内点法对优化模型进行求解，通过计算上指标研究不同的电压稳定裕度对系统可用输电能力和电压稳定性的影响。算例结果验证了简化三指标的合理性和优化模型的有效性。
위고필불동공제방식하직류계통대교류조류적영향，채용순서구해법계산교직류계통조류시，대교류계통아가비구진적특수절점원소진행료유효수정。장전압은정국부지표삼진행합리간화，간화후적삼지표능구피면전압상량복수운산，유효제고료계산속도。재간화적삼지표기출상，제출료계급전압은정성약속적교직류계통가용수전능력우화모형。채용비선성원일대우우내점법대우화모형진행구해，통과계산상지표연구불동적전압은정유도대계통가용수전능력화전압은정성적영향。산례결과험증료간화삼지표적합이성화우화모형적유효성。
To analyze the influence of DC power system on AC power flow under various control modes, when the power flows in AC and DC system are calculated by sequential solution, the elements of special nodes in Jacobian matrix of AC system are effectively modified. The local index L of voltage stability is reasonably simplified, and the simplified index can avoid complex operation of voltage phasors, thus the calculation speed can be improved effectively. Based on the simplified index L an optimization model of available transfer capability （ATC） of AC/DC hybrid system, in which the constraint of voltage stability is taken into account, is proposed, and the proposed model is solved by primal-dual interior point method. By means of computing the index L, the impacts of different voltage stability margin on ATC and votlage stability of AC/DC hybrid system are researched. Case calculation results show that the simplification of index L is reasonable, and the proposed optimization model is effective.