| 治理谐波及补偿无功功率的重要性 |
| 添加时间：2018/10/13 14:08:29 浏览次数： |
| 采用专门的滤波装置能够有效的滤除高次谐波，同时向电网提供容性无功功率，其重要性主要表现在以下方面： Special filtering devices can effectively filter out high-order harmonics and provide capacitive reactive power to the power grid. The importance of these filtering devices lies in the following aspects: 滤除高次谐波能够定化用电环境，降低视在功率，减少谐波电流在用电设备和输配电设备中的发热，直接节省有功功率；消除由于谐波产生的震动，延长电器的使用寿命；有效的消除对敏感元件的影响。 Filtering high-order harmonics can fix the power consumption environment, reduce apparent power, reduce the heating of harmonic current in power equipment and transmission and distribution equipment, directly save active power, eliminate the vibration caused by harmonics, extend the life of electrical appliances, and effectively eliminate the impact on sensitive components. 由于滤波回路是由电抗器和电容器串联形成的，所以在滤波的过程中能向电网注入容性无功，提高了功率因数，这样就能避免供电部门高额的功率因数调整电费，由于无功电流的抵消，也相当于提高了配电设备的容量，减少了线损。无功功率补偿还能提升末端的电网电压，对优化用电环境有很重要的意义。 Because the filter circuit is formed by the series connection of reactor and capacitor, the capacitive reactive power can be injected into the power grid in the process of filtering, and the power factor can be increased, so that the high power factor adjustment charges of the power supply department can be avoided. Line loss. Reactive power compensation can also improve the terminal voltage, which is of great significance to optimize the power consumption environment. 在设计滤波器时，首先应满足各种负载水平下对谐波限制的技术要求，然后在次前提下，使滤波器在经济上最为合理。除以上经济分析外，设计滤波器还应注意以下两点： In designing the filter, the technical requirements of harmonic limitation at various load levels should be met first, and then the filter should be economically reasonable on the second premise. In addition to the above economic analysis, design filters should also pay attention to the following two points: 1）单调滤波器的谐振频率会因电容，电感参数的偏差或变化而改变，电网频率会有一定的波动，这将导致滤波器失谐。设计时应保证在正常是谐的情况下滤波装置仍能满足各项要求。 1) The resonance frequency of monotone filter will be changed because of the deviation or change of capacitance and inductance parameters, and the frequency of power network will fluctuate to a certain extent, which will lead to filter detuning. The design should ensure that the filter can meet all the requirements in the normal harmonic condition. 2）电网阻抗变化对滤波装置尤其是其中的单调谐滤波器的滤波效果有较大影响。而更为严重的是，电网阻抗与滤波装置有发生并联谐振的可能，设计时应充分予以考虑。 2) The change of grid impedance has a great influence on the filtering effect of the filter device, especially the monotone filter. What is more serious is that the impedance of the power grid and the filter device may have parallel resonance, which should be fully considered in the design. |
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