Control method and control system for constant-pressure unit participating in power grid frequency modulation

Abstract

The invention discloses a control method and a control system for a constant-pressure unit participating in power grid frequency modulation, and relates to the technical field of automatic control of thermal generator sets. The technical problem that main steam pressure of the constant-pressure unit is affected when the constant-pressure unit participates in primary frequency modulation of a power grid is solved. The control method for the constant-pressure unit participating in the power grid frequency modulation comprises the steps that a first pressure value of the constant pressure unit is obtained, and the first pressure value is a real-time pressure value of main steam pressure of the constant pressure unit; whether the first pressure value is within an allowable value range of the main steam pressure or not is judged; under the condition that it is determined that the first pressure value is within the allowable value range of the main steam pressure, the constant-pressure unit is controlled to act in response to a target load instruction, so that the constant-pressure unit participates in the primary frequency modulation process of the power grid; and the target load instruction is a load instruction output to the constant-pressure unit by the power grid in the primary frequency modulation process. The control method is used for coordinating and controlling the main steam pressure and the primary frequency modulation of the constant-pressure unit.

Description

technical field [0001] The present application relates to the technical field of automatic control of thermal power generating sets, and in particular to a control method and control system for constant-voltage generating sets participating in power grid frequency regulation. Background technique [0002] In a thermal power plant, a generator set that operates at a constant pressure is called a constant pressure unit. The main steam pressure of the constant pressure unit is generally a fixed value set by the operator, which is called the rated value of the main steam pressure. When the constant pressure unit is running normally, the main steam pressure of the constant pressure unit is best maintained at the rated value to ensure the safe and stable operation of the power grid. [0003] During the process of the constant-voltage unit participating in the primary frequency regulation of the power grid, the related technology can control the heat storage of the generator set a...

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Problems solved by technology

[0005] The purpose of the embodiment of this application is to provide a control method and control system for a constant-voltage unit participating in power grid frequency regulation, so as to solve the problem in the related art that the constant-voltage unit affects the main steam pressure of the constant-pressure unit when it participates in the primary frequency regulation of the power grid. technical problem

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