Design method for two-way equivalent arc hyperbolic derivative controller of high-pressure magnetic control type paralleling reactor

Abstract

The invention provides a design method for a two-way equivalent arc hyperbolic derivative controller of a high-pressure magnetic control type paralleling reactor. The invention provides and utilizes a magnetic circuit two-way equivalent algorithm, describes saturable magnetic circuit characters via arc hyperbolic functions, and calculates an exciting current required by a control system in the manner of analytic solutions from a complex coupled non-linear magnetic circuit and a differentiating circuit equation set. The algorithm is direct and the calculation is precise. The invention has the advantages of strong novelty, rapid tracking, reliable control, and the like. The engineered application of a control module is realized by programming in an electric system complete digital real-time emulation device. The invention provides a necessary emulation tool to a super / extra high-pressure magnetic control type paralleling reactor and the real-time magnetic transient state simulation of the control system thereof and also provides a new way to design a control system for an electric system nonlinear element.

Description

technical field [0001] The invention relates to a design method of a two-way equivalent anti-hyperbolic differential controller for a high-voltage magnetically controlled shunt reactor, which belongs to the field of digital simulation modeling methods and can be applied to the controller design of saturated magnetic circuit components, especially the magnetically controlled Controller design for shunt reactors. Background technique [0002] With the construction of the Three Gorges Hydropower Station, the Jiuquan 10 million-kilowatt wind power base, and the Qinghai / Gansu large-scale photovoltaic power station, in order to solve the problem of extremely unbalanced distribution of primary energy such as coal and water conservancy and load centers, the backbone of my country's AC power system The grid structure should adopt ultra / ultra-high voltage compact lines to realize long-distance and large-capacity power transmission, and give full play to the important role of the power ...

AI Technical Summary

Problems solved by technology

The main principle of this invention is to use the existing saturated transformer and reactor splicing to simulate the characteristics of the magnetic control shunt reactor, which has important reference value for the further research of the high voltage magnetic control shunt reactor, but it is only an offline digital The simulation construction method does not establish an accurate mathematical model of the continuous saturation magnetic circuit characteristics of the reactive magnetron shunt reactor (digital simulation and mathematical model are two different concepts), and it uses the compensation method and the piecewise linearization method , the compensation method not only needs repeated iterations, which hinders the real-time / ultra-real-time electromagnetic transient simulation, but also the difference between the normalized Φ-I magnetization curve and the actual excitation characteristics, resulting in a large calculation error of the model; although the piecewise linearization method The calculation is simple, but it will inevitably cause numerical oscillation between different segments, and the super / ultra-high voltage magnetron shunt reactor is not a general nonlinear element fine-tuning in a small range, but a large-scale continuous smooth adjustment, high-voltage magnetic Controlled shunt reactor is an integral part of high-voltage flexible power transmission of smart grid. If the piecewise linearization method is adopted, it can neither meet the calculation accuracy of its large-scale adjustment, nor can it reflect its intelligent and flexible characteristics of continuous smooth adjustment, and erase the main components. The many advantages and characteristics of the above damage the accuracy of the mathematical model; not only can not describe the continuous smooth adjustment characteristics of the magnetic control shunt reactor, but also the simulation accuracy error is very large, which cannot meet the needs of the electromagnetic transient simulation of the power system

[0008] The previous research mainly focused on the analysis of the steady state. For the difficult problem of transient regulation, there has not been any literature research that has been reported.

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