CAJ | 학술논문

紧急状况下,优化包含动态负荷的系统切负荷量,以保证系统电压快速恢复正常状态是系统安全的关键.利用PMU测量信息推导了电压稳定动态线性化指标的灵敏度,将其作为实施切负荷的作用因子.建立了以切负荷量最小为目标函数和电压指标偏差量为约束条件的切负荷优化模型.首次实现了分区多步切负荷的算法,在实时计算得到的动态电压稳定指标超标基础上,利用所提出的优化模型实施多步动态优化切负荷,并实时修正作用因子的灵敏度,克服了传统一步欠切或过切的缺点.用IEEE14节点测试系统和国内实际电网算例证实了该方法的可行性和有效性.
긴급상황하,우화포함동태부하적계통절부하량,이보증계통전압쾌속회복정상상태시계통안전적관건.이용PMU측량신식추도료전압은정동태선성화지표적령민도,장기작위실시절부하적작용인자.건립료이절부하량최소위목표함수화전압지표편차량위약속조건적절부하우화모형.수차실현료분구다보절부하적산법,재실시계산득도적동태전압은정지표초표기출상,이용소제출적우화모형실시다보동태우화절부하,병실시수정작용인자적령민도,극복료전통일보흠절혹과절적결점.용IEEE14절점측시계통화국내실제전망산예증실료해방법적가행성화유효성.
@@@@It is critical to guarantee the system’s security as quickly as possible by optimizing the shedding load including dynamic components under contingencies. Dynamic voltage stability linearized index sensitivity for dynamic load model is derived based on PMU for the role of the implementation of load shedding factor;the optimization model of load shedding has been established with the objective function of a minimum of load shedding and the constraint of the voltage indicator deviation. The distributed multi-step load shedding algorithm is firstly achieved according to the dynamic order of the index-exceeding node, and the sensitivity of linearized index is corrected at each step, which overcomes the over-shedding or under-shedding problem in traditional methods. Examples of IEEE 14-bus tested system and real grid system demonstrate the feasibility and effectiveness of this method. This work is supported by National Natural Science Foundation of China (No. 50907008 and No. 60974036).