Abstract: Lack of the peak-load regulating capacity resulting from cogeneration units operating on the principle ofpower determined by heat"is one of the most important causes of tremendous curtailments of wind power in the North power grid of China.For this reason,an accommodation scheme is proposed for wind power plants with large-scale extraction units to improve their peak-load regulating ability by configuration of stored heat.The principle of this scheme is described first,then the thermoelectric generating unit external characteristics with and without heat accumulators are analyzed and modeled,and the operation mechanism of cogeneration units with heat accumulators is discussed.On this basis,the corresponding mathematical model for calculating the peak-load regulation capacity of cogeneration units with heat accumulator is developed, and the influencing factors are analyzed.Finally,the effects on improving the peak-load regulating ability of 300 MW and 200MW typical cogeneration units in North China by adding heat accumulators are analyzed,the example results showing that, at the heat load level in the given mid-heating period,the peak-load regulating capacity of 300 MW and 200 MW units could increase by 21% and 13% of their nominal capacity by adding heat accumulators respectively,providing massive room for curtailed wind power.But the effect depends on the heat load,which if close to the maximum heating ability of the units,does not exhibit appreciable effects.