输电阻塞管理的灵敏度分析模型及算法

在电力市场环境下，系统的运行方式将更加多变，发生输电阻塞的概率大为增加。文中提出了一种利用灵敏度分析进行实时阻塞管理的数学模型及算法，即在出现阻塞时，根据注入功率与支路潮流的灵敏度来削减对阻塞影响最大的发电出力或负荷，从而有效地消除阻塞。针对阻塞管理的实时性要求及阻塞只与局部电网有关的特点，采用部分求逆及稀疏矢量法等措施，使算法快速、实用。最后通过算例系统的计算，验证了所提算法的正确性和有效性。

SENSITIVITY ANALYSIS APPROACH TO TRANSMISSION CONGESTION MANAGEMENT

For the real tim e operation of power systems in power m arket environm ent,a sensitivity analysis method is suggested to solve the congestion problem in this paper.Based on the sensitivity of branch power flow with node power injection,pairs of node can be selected to alleviate the congestion phenomena with least change of injection power.To com pute the sensitivity elements relative to the branch with congestion,the method of the partly inversing of Jacobian matrix and the approach of sparse sector are used to speed up the procedure.Numerical exam ples are used to illustrate the real- tim e characteristic comparing with both DC and AC load flow m odels.