Data verification-based AGC load optimizing controlling method

Abstract

Disclosed in the invention is a data verification-based AGC load optimizing controlling method. The method comprises the following steps: step one, analyzing and comparing an AGC load instruction value issued by a dispatching center and a load instruction value received by set coordination and controlling, and solving a difference; step two, analyzing and comparing an actual power value feedbacked to the dispatching center by the set and an actual power value received by the set coordination and controlling, and solving a difference; and step three, according to the difference values that are solved at the two transmission processes, correcting a load instruction value that is received by a steam engine master controlling unit under the set coordination and controlling, and using a switcher to switch load instruction values that are inputted into the steam engine master controller in different control modes. According to the invention, a poor controlling quality phenomenon caused by poor signal transmission precision is effectively avoided; the control precision of the system is improved; the adjusting precision of a load of a thermal power generating unit is ensured; and a control quality and an indicator for performance check of thermal power generating unit AGC are enhanced. Therefore, co-ordination of supply and demand of a power grid load is guaranteed and stability of the frequency of the power grid is ensured.

Description

technical field [0001] The invention relates to an AGC load optimization control method, in particular to an AGC load optimization control method based on data checking. Background technique [0002] With the increasing capacity of the power grid, the quality of electric energy is also required to be higher and higher. For the safe and stable operation of the power grid, all large-scale thermal power units are required to use the AGC function, and the load range of the AGC control unit is required to be large (generally 50% --100% rated load), and requires the unit to have a fast, accurate and stable response to load changes. [0003] 1. AGC assessment standards and conventional control schemes for power grid dispatching [0004] (1) AGC assessment standards [0005] The assessment of AGC is mainly carried out in three aspects: adjustment speed, adjustment accuracy and response time. Such as figure 1 As shown in the typical AGC unit set point control process, this is a t...

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Problems solved by technology

[0011] The default of this control scheme is that the data applied to load control is completely accurate and there is no deviation. However, when the unit is in the AGC control mode, the AGC load command value issued by the dispatcher and the actual power value fed back to the dispatcher by the unit are required. Transmitted via remote data terminal (RTU) and dedicated channels (such as Figure 4 As shown), the signal will inevitably deviate during this circulation process, resulting in inconsistent values ​​at both ends of the plant network, resulting in poor load control accuracy of the unit, and as a result, the quality is not up to standard in the AGC assessment and evaluation of dispatching

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