Equivalent magnetic-flow difference transient state modeling method of nonlinear magnetic circuit of magnetically controlled shunt reactor

Abstract

The invention provides a practical decoupling electromagnetic transient state modeling method for describing the nonlinear magnetic saturation property of a super / extreme-high voltage magnetically controlled shunt reactor (a high-voltage magnetically controlled shunt reactor), comprising the steps of: describing nonlinear magnetic circuit property with arc hyperbolic functions; decoupling a coupling magnetic circuit equation by providing and utilizing a magnetic-flow substitute algorithm; and establishing an equivalent magnetic-flow difference electromagnetic transient state modeling method. The invention not only accurately reflects the continuously smooth regulation property of a saturated magnetic circuit of the super / extreme-high voltage magnetically controlled shunt reactor and prevents the numerical oscillation of piecewise linearization algorithm, but also can meet the requirements of real-time / faster-than-real-time simulation computation without modifying an admittance matrix and influencing computing speed under the condition of large-range continuous regulation, provides a necessary simulation tool for the real-time electromagnetic transient state computation of the super / extreme-high voltage magnetically controlled shunt reactor and also initiates a new idea for the real-time electromagnetic transient state modeling method of a nuclear element.

Description

technical field

[0001] The invention belongs to the field of digital simulation modeling methods, in particular to a transient modeling method of equivalent magnetic flux difference of a nonlinear magnetic circuit of a magneto-controlled shunt reactor, which can be applied to the modeling method of saturated magnetic circuit components, especially Digital modeling and simulation of magnetron shunt reactor. 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 grid ...

Examples

Embodiment Construction

[0075] The invention includes the description and simulation modeling method of the iron core structure and working principle of the magnetic control shunt reactor.

[0076] 1 Basic magnetic circuit circuit principle of high voltage magnetron shunt reactor

[0077] The high-voltage magnetron shunt reactor uses the characteristics of AC and DC hybrid excitation to change the saturation degree of the iron core. The winding connection method is as follows: figure 1 As shown, the core of the main magnetic circuit includes two windings, U 1 , U 2 is the AC network side winding, u d1 , U d2 is the DC winding voltage, due to the different permeability of different magnetic circuits, the magnetic flux The reluctance of the two main magnetic circuits where it is located bears the main excitation magnetomotive force in the whole system. The resistance is r, the current is i, H is the magnetic field strength, μ is the magnetic permeability, φ is the initial phase of the AC voltage,...

technical field

[0001] The invention belongs to the field of digital simulation modeling methods, in particular to a transient modeling method of equivalent magnetic flux difference of a nonlinear magnetic circuit of a magneto-controlled shunt reactor, which can be applied to the modeling method of saturated magnetic circuit components, especially Digital modeling and simulation of magnetron shunt reactor. 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 grid ...

Examples

Embodiment Construction

[0075] The invention includes the description and simulation modeling method of the iron core structure and working principle of the magnetic control shunt reactor.

[0076] 1 Basic magnetic circuit circuit principle of high voltage magnetron shunt reactor

[0077] The high-voltage magnetron shunt reactor uses the characteristics of AC and DC hybrid excitation to change the saturation degree of the iron core. The winding connection method is as follows: figure 1 As shown, the core of the main magnetic circuit includes two windings, U 1 , U 2 is the AC network side winding, u d1 , U d2 is the DC winding voltage, due to the different permeability of different magnetic circuits, the magnetic flux The reluctance of the two main magnetic circuits where it is located bears the main excitation magnetomotive force in the whole system. The resistance is r, the current is i, H is the magnetic field strength, μ is the magnetic permeability, φ is the initial phase of the AC voltage,...

Images