摘要
针对电气化铁路引起的负序、谐波和无功问题,采用将SVG背靠背联接与固定补偿(FC)相结合来实现负荷平衡以及补偿无功和谐波的方案。该方案将2台SVG背靠背联接使用,通过实时计算两供电臂的负荷差,将差值的一半有功功率通过共用的直流电容,从重臂分配到轻臂从而实现负荷平衡,并同时补偿牵引负荷引起的谐波和无功问题,达到电能质量的综合治理。该方案经过变电所实际运行,并对多种补偿方式下的电能质量进行多次测试,结果显示该方案能够达到较好的治理效果。
To solve the problems in negative sequence,reactive power and harmonic caused by electric railway,a scheme combining the fixed compensation with two back-to-back connected SVGs is presented to achieve load balance and reactive harmonic compensation.The traction load difference between two power arms is calculated in real-time and half of it is re-distributed from the heavy arm to the light arm via the common capacitor for realizing load balance and compensating the harmonic and reactive power at the same time.The scheme is applied to substation and tests show that,the power quality is well controlled under different compensation modes.
出处
《电力自动化设备》
EI
CSCD
北大核心
2010年第6期36-39,44,共5页
Electric Power Automation Equipment
基金
铁道部重大科技项目(Z2006-047)
国家科技支撑计划(2007BAA12B05)
西南交通大学科学基金项目(2007A12)~~
关键词
电气化铁路
电能质量
SVG
瞬时无功功率
背靠背
治理
electric railway
power quality
SVG
instantaneous reactive power
back-to-back
control
