Method and system for primary frequency modulation parameter self-adjustment control based on assessment data

Abstract

The invention discloses a method and a system for primary frequency modulation parameter self-adjustment control based on assessment data. The method includes the following steps: determining the primary frequency modulation qualification rate index standard value of a unit in a grid primary frequency modulation assessment system according to the running mode of the unit; comparing the primary frequency modulation qualification rate index standard value of the unit with the actual primary frequency modulation qualification rate index of the unit in the assessment system to get the primary frequency modulation qualification rate index deviation of the unit; and dynamically adjusting the primary frequency modulation power variation of the unit according to whether the primary frequency modulation qualification rate index deviation of the unit is beyond an adjustment scope, wherein the parameters of adjustment are set according to the active power variation index in the assessment system. The frequency modulation performance of the unit can be dynamically adjusted. The accuracy of response of the thermal power unit to primary frequency modulation scheduling is improved. The demand of the grid for the work of the unit primary frequency modulation action is satisfied. Safe and stable operation of the unit is considered while the frequency modulation ability is ensured.

Description

technical field [0001] The invention belongs to the field of unit frequency regulation, and in particular relates to a self-adjustment control method and system for primary frequency regulation parameters based on assessment data. Background technique [0002] With new energy connected to the grid, load growth and the scale of the grid continue to increase, under the new situation of the interconnection of the UHV grid and the regional grid, the connection between the grids at all levels is becoming increasingly close, and the requirements for coordination and cooperation between the grid and the unit are also increasing. The higher the value, the primary frequency regulation in the network plant coordination function becomes one of the effective means to stabilize the power grid. The primary frequency regulation function of the generator set is an inherent function of the turbogenerator set. It is mainly through adjusting the steam inlet control door of the DEH system and u...

AI Technical Summary

Problems solved by technology

Due to the rapidity and short-term characteristics of the primary frequency modulation, and after the unit has been running for a long time, the equipment characteristics of the unit will change to a certain extent, resulting in a decrease in the frequency modulation control accuracy, resulting in inconsistent active power change indicators in the grid assessment. Problems such as compliance with the standard and the pass rate of the monthly frequency regulation lower than the specified value, etc., which lead to the unit being assessed by the power grid

[0005] To sum up, the power plant mainly manually adjusts the relevant parameters through regular comparison of the primary frequency regulation pass rate and other indicators issued by the power grid primary frequency regulation assessment system, and there are problems such as adjustment lag and low adjustment accuracy.

At the same time, due to the AGC (automatic generation control) mode, there is a problem of reverse regulation of primary frequency regulation at some time, and the power grid has different index standards for the pass rate of primary frequency regulation depending on whether the unit is operating in AGC mode, and it is necessary for the power plant operator to provide targeted attention. Perform frequency modulation parameter processing

Images