摘要
依据等频差原则推导了等值两机系统失步过程中电压的变化特点,根据失步中心频率与两侧系统频差的对应关系,提出了基于支路两端母线频差的失步解列判据。通过计算支路两端母线频差,判断是否存在振荡中心迁移现象,定位振荡中心并判断失步状态。以CEPRI 36节点系统为例,分别对振荡中心是否发生迁移2种情况进行了判据的有效性验证,并与实际解列装置所采用的判据进行了比较,仿真结果验证了所提判据的准确性与实用性。
The voltage variation characteristics during the out-of-step process of equivalent two-generator system are derived according to the equivalent frequency difference principle and a out-of-step splitting criterion based on bus frequency difference between two terminals is proposed according to its relationship with the out-of-step centre frequency.It is calculated and used to determine if the oscillation centre has moved,relocate the oscillation centre and justify the out-of-step state.With CEPRI 36-bus system as an example,the effectiveness of oscillation centre criteria is verified by two scenarios.It is compared with that used in practical splitting equipment and simulative results validate its accuracy and practicability.
出处
《电力自动化设备》
EI
CSCD
北大核心
2014年第3期71-77,共7页
Electric Power Automation Equipment
基金
国家高技术研究发展计划(863计划)项目(2011AA-05A119)
国家电网公司大电网重大专项资助项目(SGCC-MPLG029-2012)
中央高校基本科研业务费专项资金资助项目(201120702020006)~~
关键词
失步解列
解列判据
频差
解列时刻
停电
稳定性
out-of-step splitting
splitting criterion
frequency difference
splitting time
outages
stability
