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Online statistical analysis technique for generator set primary frequency modulation performance abnormity

A generator set, statistical analysis technology, applied in system integration technology, information technology support system, reducing/preventing power oscillation, etc., can solve the problems of large fluctuation range and inability to clearly indicate the primary frequency modulation of the unit.

Active Publication Date: 2017-05-31
CENT CHINA BRANCH OF STATE GRID CORP OF CHINA +1
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Problems solved by technology

Since there are disturbances in active power and frequency in the actual system, and the effect of secondary frequency modulation cannot be clearly separated from that of primary frequency modulation, the current primary frequency modulation contribution rate index, speed change rate and other indicators often have a large range of fluctuations and cannot be clearly defined. The ground indicator indicates whether there is a problem with the primary frequency adjustment of the unit

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  • Online statistical analysis technique for generator set primary frequency modulation performance abnormity
  • Online statistical analysis technique for generator set primary frequency modulation performance abnormity
  • Online statistical analysis technique for generator set primary frequency modulation performance abnormity

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Embodiment Construction

[0084] The technical solutions of the present invention will be further introduced in detail below in conjunction with the accompanying drawings and specific embodiments.

[0085] The application of the present invention discloses a method for online statistical analysis and alarm for the abnormal primary frequency regulation performance of a generator. The application program developed according to the method will be arranged in the advanced application server of WAMS (Wide Area Measurement System) in the power grid dispatching control centers at all levels, and the required generator active power and frequency dynamic measurement data will be provided by the PMU at the generator end. The data is collected and calculated and sent to the WAMS of the master station of the dispatch control center in real time. In the current dispatching system in China, usually the data rate sent by the PMU is 50 frames / second or 25 frames / second. The method proposed by the present invention se...

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Abstract

The invention discloses an online statistical analysis technique for generator set primary frequency modulation performance abnormity. The method comprises the following steps: selecting typical primary frequency modulation events beneficial for improving precision through generator PMU measured data obtained online, calculating primary frequency modulation contribution rate of a corresponding set, calculating actually measured average speed change rate by adopting an integral algorithm, screening out reasonable primary frequency modulation performance evaluation results by using a reasonable data range and normal distribution variance, and shielding the influences of disturbance and secondary frequency modulation on primary frequency modulation performance evaluation; and then giving an alarm for primary frequency modulation abnormity of the set according to the difference between the two indexes and a reasonable value and a preset value and the change relative to historical value. Operating personnel can discover the generator sets with the problem of primary frequency modulation in time according to the calculation results and alarm information, good primary frequency modulation performance of the generator sets can also be promoted to be maintained, and safe and stable operation of grid frequency is maintained together.

Description

technical field [0001] The invention belongs to the field of safe operation of generators, in particular to an online analysis and alarm method for abnormal primary frequency regulation performance of generators. Background technique [0002] The primary frequency regulation of the generator refers to the inherent frequency response capability of the speed control system of the generator set. When the terminal frequency changes, it prevents the terminal frequency from changing automatically through the automatic control of the high-temperature and high-pressure steam energy storage pressure in the cylinder and the change of the rotor kinetic energy. Change to realize frequency adjustment with difference. Although the primary frequency regulation of the generator is a differential regulation, because it has a much faster response speed (at least 10 times) than the secondary frequency regulation that realizes frequency non-difference regulation, it can reduce the frequency flu...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/38
CPCH02J3/24H02J3/38Y02E40/70Y02E60/00Y04S10/00Y04S10/22
Inventor 段刚党杰刘勇奚江惠廖全飞黄海煜詹庆才边宏宇杨东
Owner CENT CHINA BRANCH OF STATE GRID CORP OF CHINA
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