A Small Synchronous Analog Motor with Electric Excitation Secrecy Pole

Abstract

The invention discloses a synchronous simulation motor for a small-sized electrical excitation nonsalient pole. The synchronous simulation motor comprises a laminated stator and a laminated rotor, wherein stator slots are uniformly formed in the circumferential direction of the laminated stator; adjacent stator slots form parallel teeth; the laminated rotor comprises a first pressing plate, a second pressing plate and a laminated rotor iron core in the axial direction sequentially; the laminated rotor is divided into a plurality of sector areas by magnetic pole center lines of an electrode; a plurality of damping winding grooves and an exciting winding groove are formed in each sector area at intervals; parallel teeth are arranged between the exciting winding grooves and the adjacent damping winding grooves. According to the synchronous simulation motor disclosed by the invention, the simulation of a simulation motor for main electromagnetic parameter per-unit values of a prototype machine and an electromechanical time constant is realized, and the synchronous simulation motor can effectively simulate electromagnetic and electromechanical characteristics of a large steam turbine-generator, thereby having important significance for development and construction of a dynamic simulation system and a dynamic simulation experimental research on a power system.

Description

technical field [0001] The invention belongs to the field of synchronous analog motors, and more specifically relates to a small-sized electric excitation hidden pole synchronous analog motor. Background technique [0002] With the rapid development of my country's power system, the research and test of power system and its important equipment, such as power system static stability, transient stability research, power system relay protection technology research and power system secondary equipment reliability test Both academia and industry have received great attention. Because it is very difficult to conduct tests in real power grids, the power system dynamic simulation test system (hereinafter referred to as dynamic model system) is recognized as an effective and important test tool for power system research and test verification instead of real power grid tests. [0003] Large turbogenerators are important electrical equipment in power systems. In order to accurately sim...

AI Technical Summary

Problems solved by technology

The structure of the synchronous analog motor in the prior art has the following defects: 1. The structure of the prototype motor is usually reduced for the analog motor. Since the same solid rotor as the prototype motor is used, its eddy current damping effect is difficult to achieve consistency with the prototype motor through adjustment. , thus affecting the consistency of the per unit value of the supertransient reactance

2. Since the capacity and size of the simulated motor are much smaller than that of the prototype motor, the resistance value of the simulated motor is relatively large and the reactance value is relatively small, resulting in a relatively reduced time constant

The stator winding slots and excitation slots in the existing analog motors, because the slots are designed with openings or semi-openings, the width of the slots is wide and the depth is shallow, so the leakage reactance cannot be increased; at the same time, due to the parallel slot body structure, which limits the number of windings and increases the number of windings, making the resistance value relatively large

making it difficult to achieve an accurate simulation of the prototype motor

Images