介紹了用單片機(jī)C 語言實(shí)現(xiàn)無功補(bǔ)償中電容組循環(huán)投切的基本原理和算法,并舉例說明。關(guān)鍵詞:循環(huán)投切;C51;無功補(bǔ)償中圖分類號: TM76 文獻(xiàn)標(biāo)識碼: BAbstract: This paper introduces the aplication of C51 in the controlling of capacitorsuits cycle powered to be on and off in reactive compensation.it illustrate thefondamental principle and algorithm with example.Key words: cycle powered to be on and off; C51; reactive compensation
為提高功率因數(shù),往往采用補(bǔ)償電容的方法來實(shí)現(xiàn)。而電容器的容量是由實(shí)時功率因數(shù)與標(biāo)準(zhǔn)值進(jìn)行比較來決定的,實(shí)時功率因數(shù)小于標(biāo)準(zhǔn)值時,需投入電容組,實(shí)時功率因數(shù)大于標(biāo)準(zhǔn)值時,則需切除電容組。投切方式的不合理,會對電容器造成損壞,現(xiàn)有的控制器多采用“順序投切”方式,在這種投切方式下排序在前的電容器組,先投后切;而后面的卻后投先切。這不僅使處于前面的電容組經(jīng)常處于運(yùn)行狀態(tài),積累熱量不易散失,影響其使用壽命,而且使后面的投切開關(guān)經(jīng)常動作,同樣減少壽命。合理的投切方式應(yīng)為“循環(huán)投切”。這種投切方式使先投入的運(yùn)行的電容組先退出,后投的后切除,從而使各組電容及投切開關(guān)使用機(jī)率均等,降低了電容組的平均運(yùn)行溫度,減少了投切開關(guān)的動作次數(shù),延長了其使用壽命。
The MSP-FET430U14 is a powerful flash emulation tool to quickly begin application development on the MSP430 MCU. It includes USB debugging interface used to program and debug the MSP430 in-system through the JTAG interface or the pin saving Spy Bi-Wire (2-wire JTAG) protocol. The flash memory can be erased and programmed in seconds with only a few keystrokes, and since the MSP430 flash is ultra-low power, no external power supply is required.
The debugging tool interfaces the MSP430 to the included integrated software environment and includes code to start your design immediately. The MSP-FET430UIF development tools supports development with all MSP430 flash devices