Created by Simpo PDF Creator Pro(unregistered version) 卡网中hintaunimnn网AfAA 同样，也可由首端电压和功率求得末端电压 V2=VW1-AV1)2+(6Y1)2 -1 8V 8=V-AV 4V,= PR+0X △ V - ov= PX-OR V (b)
Created by Simpo PDF Creator Pro (unregistered version) http://www.simpopdf.com 同样,也可由首端电压和功率求得末端电压 2 1 2 2 1 1 V = (V - DV ) + (d V ) 1 1 1 1 V V V tg - D = - d d ï ï þ ï ï ý ü - = + D = 1 1 1 1 1 1 1 1 V P X Q R V V P R Q X V d
Created by Simpo PDF Creator Pro(unregistered version) hn,hisimnon小fnA V 两种分解 P2R+02X V2 V2 △, := 2X-02R V2 AV PR+QX V 4y,= PR+0X Vr ov= PX -OR 6V,=P:X-2R V 特别注意： 计算电压降落时，必须用同一端的电压与功率
Created by Simpo PDF Creator Pro (unregistered version) http://www.simpopdf.com 两种分解 2 V& 2 V D & V& d 1 V& 1 V D & 1 V& d V V & & - 1 特别注意: 计算电压降落时,必须用同一端的电压与功率. ï ï þ ï ï ý ü - = + D = 2 2 2 2 2 2 2 2 V P X Q R V V P R Q X V d ï ï þ ï ï ý ü - = + D = 1 1 1 1 1 1 1 1 V P X Q R V V P R Q X V d ï ï þ ï ï ý ü - = + D = V PX QR V V PR QX V d
Created by Simpo PDF Creator Pro(unregistered version) 汽Ahan4西4。in汽A年 电压降落公式的简化 高压输电线路的特性X)>R,可令R≈0，则： △= PR +0X V △V= QX V PX -OR 6y= PX
Created by Simpo PDF Creator Pro (unregistered version) http://www.simpopdf.com 电压降落公式的简化 高压输电线路的特性 X>>R,可令R»0,则： ï ï þ ï ï ý ü = D = V PX V V QX V d ï ï þ ï ï ý ü - = + D = V PX QR V V PR QX V d
Created by Simpo PDF Creator Pro(unregistered version) n.Ihin西n:inAA问fAAy 电压损耗和电压偏移 ·电压损耗：两点间电压模值之差 △V=V1-V2=AG≈△V2 ·或表示为百分值： Ay%=V1-'2X100% V2 △2 电压偏移：线路始末端电压与线路额定电 压之差 电压偏移(%='-'×10%
Created by Simpo PDF Creator Pro (unregistered version) http://www.simpopdf.com 电压损耗和电压偏移 • 电压损耗:两点间电压模值之差 • 或表示为百分值: • 电压偏移:线路始末端电压与线路额定电 压之差 O A D B G 1 V& 2 V& 2 V D & d DV = V 1 -V 2 = AG » DV 2 (%) 1 ´100% - = N N V V V 电压偏移 % 1 2 ´100% - D = V N V V V
Created by Simpo PDF Creator Pro(unregistered version) 卡网中hintaunimnn网AfAA 2.网络元件的功率损耗 B jAOB2 B 线路 2 2 Rr+iXr 变压器 2
Created by Simpo PDF Creator Pro (unregistered version) http://www.simpopdf.com 2. 网络元件的功率损耗 1 V& Q B 1 j D 2 B j 1, 1 S I & R + jX 2, 2 S I & 2 V& 2 B j Q B 2 j D 线路 V& T - jB G T S I & , R T+jXT 变压器 11 12