区域间可用输电能力计算的灵敏度分析法

随着市场竞争程度的日益加剧,迫切需要计算输电网络的输电能力,以反映网络的实际使用情况,尽可能利用现有输电网络传输更多的电力,以降低成本。基于此,提出一种基于直流潮流的灵敏度分析法计算区域间可用输电能力。首先给出3种分配系数的定义及计算公式;其次详细推导了无线路发生停运故障、单一线路发生停运故障及多条线路同时发生停运故障情况下区域间可用输电能力的计算公式,并给出计算流程;最后将该算法应用到IEEE30节点系统。算例表明该方法计算速度快,能有效地跟踪电网和市场的变化,获得有价值的计算结果 ,满足电力市场的实时

ATC calculation among different regions based on sensitivity analysis

In order to make full use of the power transmission network to transport more power and reduce the cost,it is urgent to calculate the transfer capability as fast as possible. The paper puts forward a method based on DC power flow sensitivity analysis to calculate ATC. Firstly, the definition of distribution factor and the calculation formula are put forward. Then the detailed formulae under each situation such as without line outage, single-line outage and multi-line outage, are deduced and the computation processes are given. Finally, the mothod is applied to IEEE 30-bus system. The example result shows that the method is fast and can trace the change of power transmission network and market effectively. Furthermore, it can get more valuable result of ATC and can satisfy the real-time requirement. So it is concluded that the method is practicable enough.