On-line evaluation method of primary frequency modulation based on wams to filter out the influence of agc

Abstract

The invention relates to an on-line evaluation method for primary frequency regulation based on WAMS to filter out the influence of AGC. The method adopts WAMS data for calculation and analysis; the method can automatically filter out the influence of AGC in the process of primary frequency regulation analysis; the method comprises the following steps: monitoring the frequency of a generator set , determine whether frequency disturbance occurs; monitor the frequency of the generator set after the frequency disturbance to determine whether the primary frequency modulation is over; monitor the power of the unit to determine whether the power responds; use the data before the primary frequency modulation to determine whether there is an AGC command; calculate the primary frequency modulation performance parameters, and Check the primary frequency modulation parameters, and finally store the results in the database; this method adopts advanced WAMS system data calculation, and proposes a method to filter out the influence of AGC, the results are accurate and reliable, and can more truly reflect the primary frequency modulation of the power plant. Good results have been achieved in the application.

Description

technical field [0001] The invention relates to an online monitoring and evaluation method in the field of electric power system and automation thereof, in particular to an online evaluation method for primary frequency modulation based on WAMS to filter out the influence of AGC. Background technique [0002] With the continuous increase of unit capacity and the further deepening of the market economy, power users have higher and higher requirements for power reliability, especially stability. High-quality, reliable and stable power supply has become a common demand of users. Among them, the primary frequency regulation function of the generator set is very important to maintain frequency stability. When the grid frequency deviates from the rated value, the generator set regulation control system automatically controls the increase (when the frequency drops) or decreases (when the frequency rises) of the active power of the generator set, so that the grid frequency quickly r...

AI Technical Summary

Problems solved by technology

For the handling of this situation, some power grid companies do not consider the influence of AGC, but directly calculate the frequency modulation performance, which greatly reduces the credibility of the results, and may lead to conclusions contrary to the facts; the other part uses the AGC command signal of the EMS system , will be excluded by the power plant that issued the AGC instruction, and will not be assessed

Neither of these two methods can truly reflect the situation of a frequency regulation operation of the power plant, and there are great limitations

[0006] 3. It cannot be operated online, and operators need to retrieve offline data and manually calculate offline. Generally, after a large frequency fluctuation occurs in the power grid, the power grid company uses the frequency before and after the accident and the output of the unit to perform offline calculations, and qualitatively evaluates the primary frequency regulation of the unit. performance, the method is only suitable for the purpose of spot checking

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