High-voltage synchronous variable-frequency soft starting equipment and starting method thereof

Abstract

The invention relates to high-voltage synchronous variable-frequency soft starting equipment and a starting method thereof. The high-voltage synchronous variable-frequency soft starting equipment comprises a harmonic filter, a step-down transformer, a step-up transformer, a rectifier bridge, an inverter bridge, a control panel, a synchronous motor and a gas turbine, one end of the harmonic filter is connected with a high-voltage power grid in parallel, the other end of the harmonic filter is connected with the high-voltage side of the step-down transformer, the low-voltage side of the step-down transformer is electrically connected with the input end of the rectifier bridge, the output end of the rectifier bridge is electrically connected with the input end of the inverter bridge, and the output end of the inverter bridge is electrically connected with the low-voltage side of the step-up transformer. The high-voltage side of the boosting transformer is connected in parallel with a high-voltage grid The control panel is electrically connected with the step-down transformer, the rectifier bridge and the inverter bridge respectively; the synchronous motor and the gas turbine are coaxially installed, and the synchronous motor drives the gas turbine to start. A position sensing-free detection method is adopted, the actual position of the rotor is indirectly detected by the back electromotive force of the armature winding of the synchronous motor, and the aim of tracking the rotating speed of the rotor through the synchronous rotating speed of the motor is achieved.

Description

technical field [0001] The invention relates to the technical field of gas turbine unit control, in particular to a high-voltage synchronous frequency conversion soft starting device and a starting method thereof. Background technique [0002] At present, the development and utilization of natural gas is the only way to move towards ecological civilization. Gas turbine power generation is an important part of clean energy power generation technology, which is of great significance to actively promote the national energy revolution. [0003] When generating electricity, the gas turbine, steam turbine and generator are a shaft system, and the torque of the starting shaft system is large; the gas turbine itself cannot start automatically, and the ignition of natural gas also requires a basic speed. Therefore, when the gas turbine starts, an external power is required to start the entire shaft. The system rotates, so that the gas turbine rotates, ignites, speeds up according to ...

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Problems solved by technology

[0005] In view of this, it is necessary to provide a high-voltage synchronous variable frequency soft starter and its starting method that does not need to use a position sensor to detect the rotor position, realizes the control of the synchronous motor at the power supply end, is easy to use, and has high starting efficiency, so as to solve the problem of current gas-fired units. The technical problem of complex frequency conversion starting device system and low starting efficiency

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