电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2013年
14期
73-80
,共8页
孟金岭%肖勇%王文%孙卫明%赵伟
孟金嶺%肖勇%王文%孫衛明%趙偉
맹금령%초용%왕문%손위명%조위
电气化铁路%电能质量%负序补偿%谐波抑制%无功分配
電氣化鐵路%電能質量%負序補償%諧波抑製%無功分配
전기화철로%전능질량%부서보상%해파억제%무공분배
electrified railway%power quality%negative sequence compensation%harmonic control%reactive current allocation
针对牵引供电系统传统补偿系统治理效果欠佳且成本较高的问题,提出了一种适用于高速电气化铁路的低成本电能质量综合补偿方案。综合补偿方案由铁路功率调节器(Railway Power Controller, RPC)、晶闸管控制电抗器(Thyristor Controlled Reactor, TCR)和晶闸管投切电容器(Thyristor Switched Capacitor, TSC)构成。分析了综合补偿装置的工作原理,采用基于鉴相原理的瞬时电流检测法提取机车负载电流中的有功电流及无功电流分量。针对TCR、TSC及RPC无功补偿容量分配问题,提出了补偿装置的无功电流分配策略,根据分配策略为补偿装置提供控制信号。利用TSC和TCR分别补偿重载供电臂和轻载供电臂的缺额无功电流,铁路功率调节器的补偿容量大为降低,仅补偿牵引系统的负序电流、各次谐波电流及用于调整TSC实际补偿容量的小额无功电流,实现负序补偿和谐波抑制效果。仿真分析和样机实验结果表明了综合补偿装置负序补偿能力强,具有良好的谐波抑制能力,且降低了传统补偿装置的造价,易于工程应用。
針對牽引供電繫統傳統補償繫統治理效果欠佳且成本較高的問題,提齣瞭一種適用于高速電氣化鐵路的低成本電能質量綜閤補償方案。綜閤補償方案由鐵路功率調節器(Railway Power Controller, RPC)、晶閘管控製電抗器(Thyristor Controlled Reactor, TCR)和晶閘管投切電容器(Thyristor Switched Capacitor, TSC)構成。分析瞭綜閤補償裝置的工作原理,採用基于鑒相原理的瞬時電流檢測法提取機車負載電流中的有功電流及無功電流分量。針對TCR、TSC及RPC無功補償容量分配問題,提齣瞭補償裝置的無功電流分配策略,根據分配策略為補償裝置提供控製信號。利用TSC和TCR分彆補償重載供電臂和輕載供電臂的缺額無功電流,鐵路功率調節器的補償容量大為降低,僅補償牽引繫統的負序電流、各次諧波電流及用于調整TSC實際補償容量的小額無功電流,實現負序補償和諧波抑製效果。倣真分析和樣機實驗結果錶明瞭綜閤補償裝置負序補償能力彊,具有良好的諧波抑製能力,且降低瞭傳統補償裝置的造價,易于工程應用。
침대견인공전계통전통보상계통치리효과흠가차성본교고적문제,제출료일충괄용우고속전기화철로적저성본전능질량종합보상방안。종합보상방안유철로공솔조절기(Railway Power Controller, RPC)、정갑관공제전항기(Thyristor Controlled Reactor, TCR)화정갑관투절전용기(Thyristor Switched Capacitor, TSC)구성。분석료종합보상장치적공작원리,채용기우감상원리적순시전류검측법제취궤차부재전류중적유공전류급무공전류분량。침대TCR、TSC급RPC무공보상용량분배문제,제출료보상장치적무공전류분배책략,근거분배책략위보상장치제공공제신호。이용TSC화TCR분별보상중재공전비화경재공전비적결액무공전류,철로공솔조절기적보상용량대위강저,부보상견인계통적부서전류、각차해파전류급용우조정TSC실제보상용량적소액무공전류,실현부서보상화해파억제효과。방진분석화양궤실험결과표명료종합보상장치부서보상능력강,구유량호적해파억제능력,차강저료전통보상장치적조개,역우공정응용。
To compensate the negative sequence and harmonic current of the traction power supply system, a comprehensive compensation scheme is proposed. The comprehensive compensation system is composed of railway power controller (RPC), thyristor controlled reactor (TCR) and thyristor switched capacitor (TSC). The working principle of the device is analyzed, and instantaneous current detection method based on the principle of phase demodulation is adopted to extract the active and reactive component in the load current. The reactive current allocation strategy is proposed to provide trigger signal for TSC and TCR. TSC and TCR are used to compensate the shortfall of reactive current for the heavy-loading and light-loading supply arm. Compensation capacity of RPC is greatly reduced, only providing negative sequence current, harmonic current of the traction system, and a small amount of reactive current used to adjust the actual compensating capacity of TSC, achieving the effect of negative sequence compensation and harmonic suppression. Simulation and experimental results show that the device has a strong ability to compensate negative sequence current and a good harmonic suppression ability, suitable for engineering application as a low cost.