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在这里主要介绍高压电容补偿柜无功补偿容量的计算方法,以便在日后需要的时候能够用到,具体如下:
无功补偿容量的确定可以根据负荷的最大功率、补偿前的功率因数及要求补偿后达到的功率因数,用下式计算确定:
Q =α*P*(tanφ1—tanφ2)
式中:Q — 所需补偿的总无功功率,kvar;
α— 平均负荷系数,取0.7~0.8;
P — 用户最大负荷,kW;
tanφ1—补偿前平均功率因数角
tanφ2—补偿后平均功率因数角
或 Q =α*P*q
q — 补偿率,kvar / kW (可从附表中查取)
附表:每kW负荷所需无功补偿率值查取表
cosφ1 | cosφ2 | ||||||||||||||||
0.80 | 0.81 | 0.82 | 0.83 | 0.84 | 0.85 | 0.86 | 0.87 | 0.88 | 0.89 | 0.90 | 0.91 | 0.92 | 0.93 | 0.94 | 0.95 | 0.96 | |
0.65 | 0.417 | 0.444 | 0.471 | 0.496 | 0.522 | 0.548 | 0.574 | 0.602 | 0.628 | 0.655 | 0.682 | 0.712 | 0.741 | 0.774 | 0.804 | 0.840 | 0.878 |
0.66 | 0.386 | 0.415 | 0.442 | 0.467 | 0.493 | 0.519 | 0.545 | 0.573 | 0.599 | 0.626 | 0.654 | 0.683 | 0.712 | 0.745 | 0.775 | 0.811 | 0.849 |
0.67 | 0.357 | 0.384 | 0.411 | 0.436 | 0.462 | 0.488 | 0.514 | 0.542 | 0.566 | 0.595 | 0.622 | 0.652 | 0.681 | 0.714 | 0.744 | 0.780 | 0.818 |
0.68 | 0.327 | 0.354 | 0.381 | 0.406 | 0.432 | 0.458 | 0.484 | 0.512 | 0.538 | 0.565 | 0.594 | 0.622 | 0.651 | 0.684 | 0.717 | 0.750 | 0.788 |
0.69 | 0.297 | 0.324 | 0.351 | 0.376 | 0.402 | 0.428 | 0.454 | 0.482 | 0.508 | 0.535 | 0.562 | 0.592 | 0.621 | 0.654 | 0.683 | 0.720 | 0.758 |
0.70 | 0.270 | 0.297 | 0.323 | 0.349 | 0.375 | 0.401 | 0.427 | 0.455 | 0.481 | 0.508 | 0.535 | 0.565 | 0.594 | 0.627 | 0.657 | 0.693 | 0.731 |
0.71 | 0.241 | 0.268 | 0.295 | 0.320 | 0.346 | 0.372 | 0.398 | 0.426 | 0.452 | 0.479 | 0.506 | 0.536 | 0.565 | 0.598 | 0.628 | 0.664 | 0.720 |
0.72 | 0.212 | 0.239 | 0.266 | 0.291 | 0.317 | 0.343 | 0.371 | 0.397 | 0.425 | 0.450 | 0.477 | 0.507 | 0.536 | 0.569 | 0.599 | 0.635 | 0.673 |
0.73 | 0.185 | 0.212 | 0.239 | 0.264 | 0.290 | 0.316 | 0.342 | 0.370 | 0.396 | 0.423 | 0.450 | 0.480 | 0.509 | 0.542 | 0.572 | 0.608 | 0.646 |
0.74 | 0.157 | 0.184 | 0.211 | 0.236 | 0.262 | 0.288 | 0.315 | 0.342 | 0.368 | 0.395 | 0.425 | 0.4520 | 0.481 | 0.514 | 0.546 | 0.580 | 0.618 |
0.75 | 0.131 | 0.158 | 0.185 | 0.210 | 0.236 | 0.262 | 0.288 | 0.316 | 0.342 | 0.369 | 0.396 | 0.426 | 0.455 | 0.488 | 0.518 | 0.554 | 0.592 |
0.76 | 0.103 | 0.130 | 0.157 | 0.182 | 0.208 | 0.234 | 0.260 | 0.288 | 0.316 | 0.341 | 0.368 | 0.398 | 0.427 | 0.460 | 0.492 | 0.526 | 0.563 |
0.77 | 0.078 | 0.105 | 0.132 | 0.157 | 0.183 | 0.209 | 0.235 | 0.263 | 0.289 | 0.316 | 0.343 | 0.3730 | 0.402 | 0.435 | 0.465 | 0.501 | 0.539 |
0.78 | 0.052 | 0.079 | 0.106 | 0.131 | 0.157 | 0.183 | 0.209 | 0.237 | 0.263 | 0.290 | 0.317 | 0.347 | 0.376 | 0.409 | 0.439 | 0.475 | 0.513 |
0.79 | 0.024 | 0.051 | 0.078 | 0.103 | 0.129 | 0.155 | 0.181 | 0.209 | 0.235 | 0.262 | 0.289 | 0.319 | 0.348 | 0.381 | 0.411 | 0.447 | 0.485 |
0.80 | 0.026 | 0.052 | 0.078 | 0.104 | 0.130 | 0.157 | 0.183 | 0.210 | 0.238 | 0.266 | 0.294 | 0.326 | 0.355 | 0.387 | 0.421 | 0.458 | |
0.81 | 0.026 | 0.052 | 0.078 | 0.104 | 0.131 | 0.157 | 0.180 | 0.212 | 0.240 | 0.268 | 0.298 | 0.329 | 0.361 | 0.395 | 0.432 | ||
0.82 | 0.026 | 0.052 | 0.078 | 0.104 | 0.131 | 0.158 | 0.186 | 0.213 | 0.242 | 0.272 | 0.303 | 0.335 | 0.369 | 0.406 | |||
0.83 | 0.026 | 0.052 | 0.079 | 0.105 | 0.132 | 0.160 | 0.188 | 0.216 | 0.246 | 0.277 | 0.309 | 0.343 | 0.380 | ||||
0.84 | 0.026 | 0.053 | 0.079 | 0.106 | 0.134 | 0.162 | 0.190 | 0.220 | 0.251 | 0.283 | 0.317 | 0.354 | |||||
0.85 | 0.026 | 0.053 | 0.080 | 0.107 | 0.135 | 0.164 | 0.194 | 0.225 | 0.257 | 0.291 | 0.328 |