TY - GEN
T1 - The influence of the over-speed protection control for the isolated grid stability
AU - Zhao, Pan
AU - Dai, Yiping
PY - 2010
Y1 - 2010
N2 - In thermal power plants, the over-speed protection control (OPC) is one of the most important functions in Digital Electro Hydraulic system (DEH), the objective is to inhibit the turbine speed soaring and protect the generator's safe. However, if the OPC parameters selection is irrational, the isolated power grid which is tripped from the bulk power grid would appear the phenomenon of "power or frequency oscillation" at load rejection condition. If the oscillations are not disappeared in time, the whole grid would be collapsed, the isolated power grid is vital for resuming main grid after sudden unpredictable mistake. The mathematical model for isolated grid stability research is established in this paper, the Simulate reproduce power oscillations at the accidents. Several improvement proposals of OPC control logic are also discussed, the results show that increasing the OPC action speed point and removal speed point is benefit for preventing the grid oscillation. It's significant for guiding adjusting the OPC parameters to ensure the isolated power grid safe and stable.
AB - In thermal power plants, the over-speed protection control (OPC) is one of the most important functions in Digital Electro Hydraulic system (DEH), the objective is to inhibit the turbine speed soaring and protect the generator's safe. However, if the OPC parameters selection is irrational, the isolated power grid which is tripped from the bulk power grid would appear the phenomenon of "power or frequency oscillation" at load rejection condition. If the oscillations are not disappeared in time, the whole grid would be collapsed, the isolated power grid is vital for resuming main grid after sudden unpredictable mistake. The mathematical model for isolated grid stability research is established in this paper, the Simulate reproduce power oscillations at the accidents. Several improvement proposals of OPC control logic are also discussed, the results show that increasing the OPC action speed point and removal speed point is benefit for preventing the grid oscillation. It's significant for guiding adjusting the OPC parameters to ensure the isolated power grid safe and stable.
KW - Frequency stability
KW - Isolated power grid
KW - Over-speed protection control
UR - https://www.scopus.com/pages/publications/78751527669
U2 - 10.1109/POWERCON.2010.5666381
DO - 10.1109/POWERCON.2010.5666381
M3 - 会议稿件
AN - SCOPUS:78751527669
SN - 9781424459407
T3 - 2010 International Conference on Power System Technology: Technological Innovations Making Power Grid Smarter, POWERCON2010
BT - 2010 International Conference on Power System Technology
T2 - 2010 International Conference on Power System Technology: Technological Innovations Making Power Grid Smarter, POWERCON2010
Y2 - 24 October 2010 through 28 October 2010
ER -