1.在输出电线路中利用高压电容器可以组成串补贴,提高输出电线路的输送能力;
2.在大型变电路中利用高压电容器可以组能成SNC,提高电能质量!
3.在配电线高线中等未端的功率因数,保障线路未端的电压
4.在变电站中,低压各段母线,均会装有高压电容器以补偿负荷消耗的无功,提高线侧的功率因数;
5.在有非线性负荷的负荷终端站,也会装高高压电容器,作为滤波之用!
陶瓷高压电容具有多种温度级别。适用于作旁路或耦合,低频损耗和电容量稳定性要求不高的鉴频电路中。
(一)高压陶瓷电容器的材料特性:
序号 | 材 质 | 使用温度 (℃) | 绝缘电阻 (≥MΩ) | 介质损耗 ≤ | 变化率 |
1 | UJ | -25~+85 | 100000 | 6×10-4 | +/-520PPM |
2 | SL | -25~+85 | 100000 | 6×10 | +/-650PPM |
3 | X5F(B) | -40~+125 | 100000 | 1% | +/-5% |
4 | X7R(B) | -40~+125 | 100000 | 1.5% | +/-10% |
5 | N4700 (DL) | -25~+85 | 200000 | 0.2% | +/-28% |
-40~+105 | 200000 | 0.2% | +/-33% |
6 | Y5T(D) | -25~+85 | 100000 | 1% | +22/-33% |
7 | Y5U(E) | -25~+85 | 10000 | 2% | +22-56% |
8 | Y5V(F) | -25~+85 | 10000 | 2% | +22 |
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