Amaliy mashg’ulot №1 elektr yuklama grafiklarini xarakterlovchi kattaliklarni hisoblash reja

1.2. Mаsаlаlаrni yechish uchun misоllаr

1-misol. Korxonada mavjud iste’molchilarning o’rnatilgan quvvati 850 kVt bo’lib, ularning hisoblangan to’la quvvati 1000 kVA bo’lsa, aktiv quvvatga nisbatan talab koeffitsiyentining qiymatini aniqlang, K_t=? (cosφ=0,7).

P_n=850 kVt, S_x=1000 kVA, cosφ=0,7.

2-misol. Zavodga o’rnatilgan kuch iste’molchilarining nominal quvvatlari mos ravishda 80, 40, 50, 70, 45 kVt bo’lib, ular bir sutka davomida mos ravishda 16, 12, 15, 10, 20 soat ish faoliyatida bo’lgan bo’lsa, ishlatilish koeffitsiiyentini aniqlang, K_i=?

P_n1=80 kVt, P_n2=40 kVt, P_n3=50 kVt, P_n4=70 kVt, P_n5=45 kVt.
t₁=16 s, t₂=12 s, t₃=15 s, t₄=10 s, t₅=20 s.



3-misol. Korxonada mavjud iste’molchilarning o’rnatilgan quvvati 8000 kVt bo’lib, ularning hisoblangan reaktiv quvvati ham 8000 kVAr hamda hisoblangan to’la quvvati 10000 kVA bo’lsa, aktiv quvvatga nisbatan talab koeffitsiyentining qiymatini aniqlang, K_t=?.
P_n=8000 kVt, S_x=10000 kVA, Q_x=8000 kVAr.

4-misol. Korxonada mavjud yirik AD larning o’rnatilgan quvvatlari mos ravishda 250, 400, 500 kVt bo’lib, ular sutka davomida mos ravishda 8, 8, 8 soat ish faoliyatida bo’lgan bo’lsa talab koeffitsiyentining qiymati K_t=0,9 uchun maksimum koeffitsiyentni hisoblang, K_m.a=?
P_n1=250 kVt, P_n2=400 kVt, P_n3=500 kVt. t₁=8 s, t₂=8 s, t₃=8 s, K_t=0,9.

5-misol. Zavodga o’rnatilgan iste’molchilarining yuklamasi 80, 40, 50, 70, 45 kVt bo’lib, ular bir sutka kesimida mos ravishda 4, 5, 6, 6, 3 soat ish faoliyatida bo’lgan bo’lsa, forma koeffitsiyentini aniqlang, K_f=?

P_ist.1=80 kVt, P_ist.2=40 kVt, P_ist.3=50 kVt, P_ist.4=70 kVt, P_ist.5=45 kVt.
t₁=4 s, t₂=5 s, t₃=6s, t₄=6 s, t₅=3 s.

6-misol. Korxonada mavjud AD lar uchun aniqlangan reaktiv o’rtacha quvvat 750 kVAr, aniqlangan eng katta quvvat esa 1800 kVt bo’lsa, reaktiv quvvat bo’yicha grafikni to‘ldirish koeffitsiyentni hisoblang, K_g.t=? cosφ=0,9.

P_m=1800 kVt, Q_o’rt=750 kVAr.

7-misol. Zavodga o’rnatilgan iste’molchining yulklamasi 80, 40, 50, 70, 45 kVt bo’lib, ular bir sutka kesimida mos ravishda 4, 5, 6, 6, 3 soat ish faoliyatida bo’lgan holda o’rnatilgan quvvat 100 kVt bo’lsa, yuklanish koeffitsiyentini aniqlang, K_yuk.=?

P_ist.1=80 kVt, P_ist.2=40 kVt, P_ist.3=50 kVt, P_ist.4=70 kVt, P_ist.5=45 kVt.
t₁=4 s, t₂=5 s, t₃=6s, t₄=6 s, t₅=3 s. P_nom=100 kVt.