无功补偿容量如何确定?无功补偿容量计算公式
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)
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 | |
0.50 | 0.981 | 1.008 | 1.035 | 1.060 | 1.086 | 1.117 | 1.138 | 1.166 | 1.192 | 1.219 | 1.246 | 1.276 | 1.305 | 1.338 | 1.368 | 1.404 | 1.442 |
0.51 | 0.939 | 0.966 | 0.933 | 1.018 | 1.044 | 1.070 | 1.106 | 1.134 | 1.160 | 1.187 | 1.214 | 1.244 | 1.273 | 1.306 | 1.336 | 1.372 | 1.410 |
0.52 | 0.890 | 0.917 | 0.945 | 0.969 | 0.995 | 1.021 | 1.047 | 1.075 | 1.101 | 1.128 | 1.155 | 1.185 | 1.217 | 1.247 | 1.277 | 1.313 | 1.351 |
0.53 | 0.819 | 0.876 | 0.903 | 0.928 | 0.954 | 0.980 | 1.006 | 1.034 | 1.060 | 1.087 | 1.114 | 1.144 | 1.173 | 1.120 | 1.206 | 1.236 | 1.272 |
0.54 | 0.808 | 0.835 | 0.862 | 0.887 | 0.913 | 0.939 | 0.965 | 0.993 | 1.019 | 1.046 | 1.075 | 1.103 | 1.133 | 1.165 | 1.195 | 1.231 | 1.269 |
0.55 | 0.766 | 0.793 | 0.820 | 0.815 | 0.871 | 0.8970.859 | 0.923 | 0.951 | 0.977 | 1.004 | 1.031 | 1.061 | 1.090 | 1.123 | 1.153 | 1.189 | 1.227 |
0.56 | 0.728 | 0.755 | 0.782 | 0.807 | 0.829 | 0.859 | 0.885 | 0.913 | 0.939 | 0.966 | 0.991 | 1.023 | 1.052 | 1.085 | 1.115 | 1.151 | 1.189 |
0.57 | 0.691 | 0.718 | 0.745 | 0.770 | 0.796 | 0.822 | 0.846 | 0.876 | 0.902 | 0.929 | 0.956 | 0.986 | 1.015 | 1.048 | 1.078 | 1.114 | 1.520 |
0.58 | 0.655 | 0.682 | 0.709 | 0.734 | 0.760 | 0.786 | 0.812 | 0.840 | 0.866 | 0.893 | 0.920 | 0.950 | 0.979 | 1.012 | 1.042 | 1.078 | 1.116 |
0.59 | 0.618 | 0.645 | 0.672 | 0.697 | 0.723 | 0.749 | 0.775 | 0.803 | 0.829 | 0.856 | 0.883 | 0.913 | 0.942 | 0.975 | 1.005 | 1.041 | 1.079 |
0.60 | 0.583 | 0.610 | 0.637 | 0.662 | 0.688 | 0.714 | 0.740 | 0.768 | 0.794 | 0.821 | 0.848 | 0.878 | 0.905 | 0.940 | 0.970 | 1.006 | 1.044 |
0.61 | 0.549 | 0.576 | 0.603 | 0.628 | 0.654 | 0.680 | 0.706 | 0.734 | 0.760 | 0.787 | 0.841 | 0.844 | 0.873 | 0.906 | 0.936 | 0.972 | 1.010 |
0.62 | 0.515 | 0.547 | 0.560 | 0.594 | 0.620 | 0.640 | 0.672 | 0.700 | 0.726 | 0.753 | 0.780 | 0.810 | 0.839 | 0.872 | 0.902 | 0.938 | 0.974 |
0.63 | 0.481 | 0.508 | 0.535 | 0.560 | 0.586 | 0.612 | 0.638 | 0.666 | 0.692 | 0.719 | 0.746 | 0.776 | 0.805 | 0.838 | 0.868 | 0.904 | 0.942 |
0.64 | 0.450 | 0.477 | 0.504 | 0.529 | 0.555 | 0.581 | 0.607 | 0.635 | 0.661 | 0.688 | 0.715 | 0.745 | 0.774 | 0.807 | 0.837 | 0.873 | 0.911 |
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 |