S51SPSEG

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S51SPSEG stands for a Synchronous 51-level Single-Phase Shunt Open-Loop Electronic Governor, which is a frequency regulation device for electrical networks. It is especially suitable for multiple generating units of power stations whose power loading fluctuates greatly. It accurately controls the frequency and voltage stability of the network, stabilizes the operation of the power system and improves the power quality.
S51SPSEG is composed of digital signal processor (DSP), fast current regulation circuit, memory unit, communication unit, precision analog-digital conversion circuit, and the motor speed / system speed measurement unit.
The main purpose of this device is to automatically adjust the output power of the steam turbine generator set so that the power station run at a stable frequency and voltage. It is mainly applied to multiple power station units that are connected to the power grid.
The working process of this device is relatively simple and efficient. When the set power of the power station cannot maintain a steady-state frequency, S51SPSEG will compare the output of the speed measurement unit with the preset frequency and voltage and adjust the frequency to the preset value. The speed measurement unit will detect the real-time speed of the synchronous machine; the digital signal processor will receive these information signals from the speed measurement unit firstly. Secondly, it will compare the detected actual speed with the preset speed to calculate the frequency error required to achieve the set speed. It then calculates the necessary regulation value. Lastly, the regulation value is sent to the fast current regulation circuit, which adjusts the output power of the power plant to achieve the corresponding regulation effect.
In the application of S51SPSEG, the precision of speed and frequency measurement by speed measurement unit is the key to ensuring the normal regulation of the power station frequency. Generally speaking, the working accuracy of this unit is between 0.2% and 0.5%. In addition, the control of the speed measurement unit is also extremely important and should meet the requirements of power station load suddenly changed. The S51SPSEG self-adapting output range is 8% - 30%.
In conclusion, S51SPSEG is a frequency regulation device that effectively meets the needs of frequency and voltage stability of the set power of multiple generating units and it is able to monitor and regulate the running state of the synchronous machine by detecting and processing the real-time signals from the speed measurement unit. Its fast current regulation circuit is able to adjust the output power of the steam turbine generator set efficiently.

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