电工电气
電工電氣
전공전기
ELECTROTECHNICS ELECTRIC
2014年
1期
16-19
,共4页
高压变频器%锁相环%同步投切%连续性%变频故障
高壓變頻器%鎖相環%同步投切%連續性%變頻故障
고압변빈기%쇄상배%동보투절%련속성%변빈고장
high-voltage inverter%phase-locked loop%synchronous switching%continuous%inverter failure
介绍了高压变频同步投切系统主回路的基本原理及实现方法,给出了同步切换流程及其保护逻辑,切换时利用软件锁相环技术调整变频器输出电压与电网电压的相位、幅值、频率一致,然后通过可编程控制器及自动开关完成变频与工频间的切换,试验验证了该方法的可行性,具有较高的现场应用价值。
介紹瞭高壓變頻同步投切繫統主迴路的基本原理及實現方法,給齣瞭同步切換流程及其保護邏輯,切換時利用軟件鎖相環技術調整變頻器輸齣電壓與電網電壓的相位、幅值、頻率一緻,然後通過可編程控製器及自動開關完成變頻與工頻間的切換,試驗驗證瞭該方法的可行性,具有較高的現場應用價值。
개소료고압변빈동보투절계통주회로적기본원리급실현방법,급출료동보절환류정급기보호라집,절환시이용연건쇄상배기술조정변빈기수출전압여전망전압적상위、폭치、빈솔일치,연후통과가편정공제기급자동개관완성변빈여공빈간적절환,시험험증료해방법적가행성,구유교고적현장응용개치。
Introduction was made to the basic principle and realizing method of main circuit of high-voltage inverter synchronous switching system. This paper gave the synchronous switching flow chart and its protective logic. On switching, by using software phase-locked loop technique, inverter output voltage was adjusted, as well as the grid voltage phase, amplitude, frequency in unifor-mity, then the switching between inverter and power was accomplished by the PLC and automatic switch. The test has verified the feasibility of the method, with higher site application value.