


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 |