Generator set primary frequency modulation dynamic compensation method and system based on steam enthalpy drop

A generator set and dynamic compensation technology, applied in the direction of reducing/preventing power oscillation, etc., can solve the problem that the unit's primary frequency regulation load compensation cannot meet the design requirements, and achieve the effect of improving the primary frequency regulation capability and technical indicators

Active Publication Date: 2018-01-23
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
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Problems solved by technology

Therefore, when calculating the primary frequency regulation command of this type of generator set, if the work of the steam extraction part is not considered, it will inevitably cause the primary frequency regulation load compensation of the unit to fail to meet the design requirements

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  • Generator set primary frequency modulation dynamic compensation method and system based on steam enthalpy drop
  • Generator set primary frequency modulation dynamic compensation method and system based on steam enthalpy drop
  • Generator set primary frequency modulation dynamic compensation method and system based on steam enthalpy drop

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[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0033] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention discloses a generator set primary frequency modulation dynamic compensation method and system based on steam enthalpy drop. Real-time parameters of a temperature, a pressure and flow ofadmission and various steam extraction and steam exhausts of a steam turbine are acquired; a steam enthalpy value parameter table is queried to obtain an enthalpy value of each parameter of the steam;a difference between work done by steam extraction of the steam turbine and work completely done for enabling the steam to flow out of a steam exhaust port is calculated; and by conversion, the workdifference is compensated to high-pressure admission of the steam turbine so as to complete correction on set primary frequency modulation load compensation. According to the invention, advanced and reasonable compensation of a set primary frequency modulation instruction is implemented, and the problem that primary frequency modulation load compensation of an extraction-condensation type unit generator set cannot reach the design requirements when a power grid frequency is fluctuated in a range of a small amplitude is solved, so that a technical index of primary frequency modulation of the generator set is improved.

Description

technical field [0001] The invention relates to a dynamic compensation method and system for primary frequency modulation of a generator set based on steam enthalpy drop. Background technique [0002] With the gradual maturity of large-scale generating set equipment and control technology in my country, large-capacity thermal power generators have become the mainstream of power supply construction. At the same time, new energy power generation, UHV, and smart grid construction have also developed rapidly. With major changes, the safe and stable operation of the power grid has higher and higher requirements for the flexible frequency and peak shaving capabilities of generator sets. [0003] As an important technical means of power grid frequency modulation, primary frequency modulation technology plays an increasingly important role in power grid dispatching and operation. At present, in regional power grids that lack hydroelectric power generation and gas-fired power generat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
Inventor 苏建军刘卫明韩英昆肖冰王瑞张平贺鸿鹏宋洋韩晋思苏鹏孙晓达郭俊英范闻迪陈欢颐
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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