𝗛𝗼𝘄 𝘁𝗼 𝗣𝗲𝗿𝗳𝗼𝗿𝗺 𝗥𝗲𝗮𝗰𝘁𝗶𝘃𝗲 𝗣𝗼𝘄𝗲𝗿 𝗖𝗼𝗺𝗽𝗲𝗻𝘀𝗮𝘁𝗶𝗼𝗻? 🤔
The capacities circuit is similar to the inductive circuit, as reactive power is exchanged between the capacities element and the power source. The only difference is a half-cycle time shift⏳. When the inductive circuit absorbs energy from the power source for half a cycle, it coincides with the capacitor discharging🔄, while in the other half cycle, the inductive element returns energy to the power source, and the capacities circuit charges🔋. By paralleling the capacitor with the inductance, the capacities element can replace the power source in exchanging this part of the reactive power🔗. AC power is necessary to provide active power⚡️, and it's actually quite challenging to achieve complete reactive power compensation.
📌 𝙉𝙤𝙩𝙚: The equivalent circuit of most electrical equipment can be seen as a series circuit of resistor R and inductance L.
𝗪𝗵𝗮𝘁 𝗮𝗿𝗲 𝘁𝗵𝗲 𝗖𝗼𝗺𝗺𝗼𝗻 𝗠𝗲𝘁𝗵𝗼𝗱𝘀 𝗼𝗳 𝗥𝗲𝗮𝗰𝘁𝗶𝘃𝗲 𝗣𝗼𝘄𝗲𝗿 𝗖𝗼𝗺𝗽𝗲𝗻𝘀𝗮𝘁𝗶𝗼𝗻 𝗶𝗻 𝘁𝗵𝗲 𝗣𝗼𝘄𝗲𝗿 𝗚𝗿𝗶𝗱?💡
Common methods of reactive power compensation in the power grid include centralized compensation, distributed local compensation, and single-machine local compensation.
▪ 𝘾𝙚𝙣𝙩𝙧𝙖𝙡𝙞𝙯𝙚𝙙 𝘾𝙤𝙢𝙥𝙚𝙣𝙨𝙖𝙩𝙞𝙤𝙣📍
Connecting the compensating capacitor directly to the high or low voltage bus-bar of the substation to compensate for the reactive power within the power supply range of the substation is known as centralized compensation. Capacitors are centrally installed on the 6-10 KV bus-bar of the enterprise or regional main step-down substation to improve the power factor of the entire substation, making the reactive power within the substation's power supply range basically balanced⚖️. This can reduce reactive power loss in high-voltage lines and improve the power supply voltage quality of the substation📈.
▪ 𝘿𝙞𝙨𝙩𝙧𝙞𝙗𝙪𝙩𝙚𝙙 𝙇𝙤𝙘𝙖𝙡 𝘾𝙤𝙢𝙥𝙚𝙣𝙨𝙖𝙩𝙞𝙤𝙣🔧
Connecting the capacitors to the bus-bar of the workshop power box to compensate for the reactive load of nearby motors is known as distributed local compensation, compared to centralized compensation in the main distribution room. This method is suitable for high-voltage distribution devices or low-voltage power devices near distribution boxes with a relatively dense group of motors🔋. It is particularly suitable for motor groups of 4 KW or less in low voltage or backup high-voltage motor groups.
▪ 𝙎𝙞𝙣𝙜𝙡𝙚-𝙈𝙖𝙘𝙝𝙞𝙣𝙚 𝙇𝙤𝙘𝙖𝙡 𝘾𝙤𝙢𝙥𝙚𝙣𝙨𝙖𝙩𝙞𝙤𝙣🛠
Placing the capacitors near the motor for individual local compensation is called single-machine local compensation. This method is mainly suitable for motors that operate for long hours annually⏲️.
#PowerGrid #Electrician #ReactivePowerCompensation #Capacitor #Inductor #PowerSource #ElectricalEquipment #Motor #PowerFactor #ElectricalNetwork
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3moVery informative