调速系统对孤网频率稳定性影响分析任华;姚秀萍;常喜强;周专;15-18+39

摘要:

随着区间电网的互联，各地区的自然资源得到充分的利用。但是有些区间联络线由于输电走廊限制等原因 相对较弱，一旦发生解列事故，容易形成送端( 受端) 孤立电网，将导致局部系统功率严重失衡，系统的频率稳定问题 就会凸显出来。以新疆阿勒泰地区电网为研究对象，分析调速系统调速特性以及调速系统对孤网频率稳定性的影 响，得出孤网中不同容量机组调速系统对孤网频率影响不同; 水电机组调速系统和火电机组调速系统对孤网频率影 响不同; 不同容量水电、火电机组调速系统之间的配合对孤网频率影响不同。运用 PSASP 仿真验证了相关结论。这 对实际电网运行、水电和火电机组调速系统之间的配合具有重要的参考价值。

Abstract:

Along with the interconnection of interval power grids，natural resources in different areas have been utilized sufficiently． But because of the weakness of some interval links caused by transmission corridor limit and so on，the send － end isolated power grid and the receiving － end isolated power grid will come into being easily if the splitting accidents happen， which will lead to the serious power imbalance of local system，and some problems about the stability of system frequency will come up． Taking the power grid of Altay as the objective of the research，the characteristic of governing system and the influence of governing system on frequency stability of isolated power grid are analyzed． It is obtained that the governing system of the unit with different capacity has different impacts on the frequency of isolated power grid，the governing system of hydroelectric generating set and the governing system of thermoelectric generating set have different impacts on the frequency of isolated power grid，and the cooperation between governing systems of hydroelectric generating set and thermoelectric generating set with different capacity has different impacts on the frequency of isolated power grid． The simulation with PSASP verifies the related conclusions，which has an important reference for the operation of actual power grid and the cooperation between the governing systems of hydroelectric generating set and thermoelectric generating set