Study Of Primary Frequency Regulation For Supercritical Unit Based On Mechanism Modeling

With the increasing of the power grid capacity, the stability of the power grid frequency is more and more important, it is directly related to the stability and security of the power grid operation, the effective investment of primary frequency regulation function in operating unit, is the important technical guarantee to maintain the stability of the power grid frequency, it has become an important part of generator automatic control system. This article utilizes the method of pressure node, establishes the mathematic model of the coordinated control system for supercritical unit, and introduces in detail the theoretical calculation method of the heat storage coefficient of boiler in the model. Respectively when supercritical unit is in constant pressure operation and sliding pressure operation, the simulation test of primary frequency regulation is carried out at different load, and the test results are compared and analyzed.