Comprehensive controlling and protecting device and comprehensive controlling and protecting method for waste heat recovery turbo generator set

Abstract

The invention relates to a comprehensive controlling and protecting device and a comprehensive controlling and protecting method for a waste heat recovery turbo generator set. The device comprises a control computer, a voltage sensor, a current sensor, a communication unit and a fault protection and alarm signal unit; the voltage sensor and the current sensor are arranged on an output line of a generator and connected with the control computer through a simulated connecting line; and the control computer is also provided with a voltage and reactive power control signal unit. The method comprises the steps of constant power factor control of the generator, active power control of a steam turbine, voltage adjustment and frequency adjustment of the generator, connection of the generator and a power grid and the like. The device has the advantages of high integration degree, simple structure, small size, low cost, convenience in installation, low debugging workload, wide application range, high efficiency and high reliability, can communicate with an upper computer, and fulfills the aims of centralized monitoring and diagnosis. The method has the advantages of high automation degree, stability and reliability, and is easy to operate.

Description

technical field [0001] The invention relates to a comprehensive control and protection device and a comprehensive control and protection method of a waste heat recovery steam turbine generator set, belonging to the technical field of control in electric systems. Background technique [0002] The control system of the existing waste heat recovery steam turbine generator set is divided into a generator control part and a steam turbine control part, and the steam turbine control part is generally controlled by a dedicated integrated controller. The control and protection of the generator set are composed of discrete single-function devices, such as image 3 As shown; the grid-connected control of the generator set and the reverse power, over-current, over-voltage, single-phase grounding, grid failure, active power measurement of the generator, and reactive power control of the generator set all use discrete single-function devices. Through the control of these single-function d...

AI Technical Summary

Problems solved by technology

Due to the many discrete single-function devices in the existing technology, the disadvantages are: 1. It cannot communicate with the host computer, which is not conducive to centralized monitoring and diagnosis; 2. The control system itself has a large structural cost, including more consumables; 3. Every Each single-function device needs to be installed, debugged and calibrated separately, which increases the complexity of debugging and labor costs; 4. Too many single-function devices also affect the reliability of the whole machine to a certain extent; 5. The installation space occupied is large, and the matching The control cabinet is correspondingly larger

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