Automatic power control parameter adjusting system and method based on automatic data searching

Abstract

The invention discloses an automatic power control parameter adjusting system and method based on automatic data searching. The system comprises an automatic set data searching calculation module, a function module, a high and low amplitude limit module and an analogy quantity selector. According to the method, mass data in a set decentralized control system is used to selected variables related to set power control, relative stable points of the set power is searched automatically according to whether the variables satisfy stability boundary conditions, adjacent power stable points are operated, a proportion control coefficient corresponding to a power interval is solved, and the proportion parameter of a steam turbine power controller is adjusted dynamically in real time. The relative stable point of the set power can be searched automatically, the proportion parameter of power control is calculated automatically, dynamic compensation correction is realized, and thus, the accuracy ofset power adjustment is guaranteed, it can be ensured that the network related index of the set reach the standard, the set adjusting validity is improved, and safe and stable operation of the set isensured.

Description

technical field [0001] The invention relates to the technical field of thermal power unit network source coordination, in particular to an automatic adjustment system and method for power control parameters based on automatic data acquisition. Background technique [0002] With the construction of smart grids such as UHV grid interconnection and new energy grid-connected power generation, cross-regional DC system failures, insufficient peak shaving and emergency peak shaving capabilities, accelerated UHV construction and AC-DC hybrid operation risks, disastrous weather, etc. The risk faced by the safe operation of the regional power grid, the frequency of large power fluctuations has increased significantly compared with the past, which can easily cause large fluctuations in the frequency of the power grid. For example, on September 19, 2015, a ±800kV UHVDC transmission line was struck by lightning at the sending end, resulting in bipolar blockage of the DC, resulting in a l...

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Problems solved by technology

[0004] The above control method can effectively ensure the action effect of the next frequency regulation and AGC in most of the time, but due to the long-term operation of the unit or the maintenance and replacement of equipment, the characteristics of the unit equipment will change to a certain extent, which will cause the quality of the unit power adjustment. , that is, there is a mismatch problem between the controlled object and its controller parameters at this time, in order to improve the performance of the control system, it is necessary to readjust the control parameters

However, the current method of readjusting the control parameters is mainly to obtain the proportional parameters of the corresponding controlled object through the step disturbance test, and the test period is long after the problem is exposed, and it will also interfere with normal industrial production. Therefore, the current method of readjusting the control parameters will, on the one hand, cause a decrease in network-related indicators such as AGC comprehensive indicators and the pass rate of a frequency modulation action, and on the other hand, cause abnormal conditions such as overshoot and oscillation in the adjustment of the equipment. Affecting the safe and stable operation of the source network

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