Uninterruptible Power Supply (UPS): Taswira na Bayanai

Muhimmiya aikin UPS (Uninterruptible Power Supply)?

An Uninterruptible Power Supply (UPS) shine wani abu da ake amfani da ita a matsayin masu sauran aiki na karamin tsari a lokacin da ake gudanar da abubuwa a kan tushen ruwa mai karfi.

A cikin UPS, zai iya gudanar da energy a cikin flywheels, batteries, ko super capacitors. Idan a sanya da wasu aikins masu sauran aiki, ana iya bayyana in UPS ke na fa'idar inganci a kan gudanar da abubuwan da ake gudanar da su a lokacin da ake gudanar da abubuwa a kan tushen ruwa mai karfi.

Yana da wakilci mai kalmomi a cikin battery, amma wannan lokaci yana da kyau don in ake kula da jin aiki (kamputar, fadada telekomunikasi, baka) ko in ake gudanar da tushen ruwa mai karfi na gaba.

Za a iya amfani da UPS a matsayin abu da ake amfani da shi don inganta wasu hardware da za su iya haifar da lafiya ko ya faruwa a lokacin da ake gudanar da abubuwa a kan tushen ruwa mai karfi.

Ana iya kiran UPS da sunan Uninterruptible power source, Battery backup, ko Flywheel back up. Tushen UPS daga 200 VA da ake amfani da shi don kamputar gajeru zuwa wasu tushen dubu da ke da 46 MVA.

Muhimmanci na biyu na UPS

Idan ake gudanar da abubuwa a kan tushen ruwa mai karfi, zai iya gudanar da energy ga UPS a lokacin da ta fito. Wannan shine muhimmin aikin UPS. Kafin haka, zai iya taimakawa wajen inganta wasu abubuwan da suka faruwa a kan tushen ruwa mai karfi.

Abubuwan da za su iya inganta sun hada da voltage spike (over voltage), Noise, Quick reduction in input voltage, Harmonic distortion, and the instability of frequency in mains.

Abubuwan da ke da UPS

Gaskiya, ana kirkirar UPS da ke da On-line UPS, Off- line UPS, and Line interactive UPS. Wasu cutar da suke da Standby on-line hybrid, Standby-Ferro, Delta conversion On-Line.

Off-line UPS

Wannan UPS shine wani Standby UPS system da ke da hasashen mafi so. A cikin wannan, tushen ruwa mai karfi shine filtered AC mains (da ake nuna a cikin figure 1).

Idan ake gudanar da abubuwa, transfer switch zai zama tushen ruwa mai karfi (da ake nuna a cikin figure 1).

Saboda haka, zan iya tabbatar da cewa standby system zai faru a lokacin da ake gudanar da abubuwa a kan tushen ruwa mai karfi. A cikin wannan system, zai iya rectify AC voltage kuma za a gudanar da shi a cikin battery da ke gudanar da rectifier.

Idan ake gudanar da abubuwa, zai iya convert DC voltage to AC voltage by means of a power inverter, and is transferred to the load connected to it.

Wannan shine UPS da ke da damar da ake amfani da shi kuma yana taimakawa wajen inganta surge protection. Wakilcin transfer time yana da kyau don in ake gudanar da utility voltage da ke gudanar da shi. Block diagram ta shahara da a cikin figure 1.

On-line UPS

A cikin wannan type na UPS, ana amfani da double conversion method. A cikin wannan, maimakon da AC input zai iya convert to DC by rectifying process for storing it in the rechargeable battery.

Wannan DC zai iya convert to AC by the process of inversion and given to the load or equipment which it is connected (figure 2).

Wannan type na UPS ana amfani a wurare da electrical isolation yana da muhimmanci. Wannan system yana da damar da ke da damar da ake amfani da shi saboda converters and cooling systems da ke da waɗannan.

A cikin wannan, rectifier da ke powered with the normal AC current zai iya drive the inverter directly. Saboda haka, ana kira shi Double conversion UPS. Block diagram ta shahara da a cikin figure 2.

Idan ake gudanar da abubuwa, rectifier ba zai da muhimmanci a cikin circuit, kuma steady power stored in the batteries which is connected to the inverter is given to the load by means of transfer switch.

Idan an gudanar da abubuwa, rectifier zai faru a yi charging batteries. Don in ake kula da batteries daga overheating, ana iya limit charging current. A lokacin da main power breakdown, wannan UPS system operates with zero transfer time.

Saboda haka, backup source zai faru a matsayin primary source, not the main AC input. Amma presence of inrush current and large load step current can result in a transfer time of about 4-6 milliseconds in this system.

Line Interactive UPS

Don small business and departmental servers and webs, ana amfani da line interactive UPS. Wannan shine more or less same as that of off-line UPS.

Tambayar shine addition of tap changing transformer. Voltage regulation is done by this tap-changing transformer by changing the tap depending on input voltage. Additional filtering is provided in this UPS result in lower transient loss. The block diagram is shown below.