Different congestion management methodologies are adopted according to different types of transaction or settlement mechanism. Locational marginal prices ( LMP ), a pricing method used to price energy purchases and sales in market, also can alleviate congestion. 针对不同的电力交易品种、不同的结算方式,阻塞管理的方法也不同。节点边际电价作为衡量电量价格的一种方法,同时也是缓解阻塞的一种手段。