| 一次消谐器特点 |
| 添加时间：2018/11/8 15:40:45 浏览次数： |
| 一次消谐器特点 Characteristics of primary harmonic eliminator 通过对配电网中一次消谐器消除电压互感器铁磁谐振的特点介绍,对现在几种消谐做法的应用情况进行分析,提出了在同一配电网中一次消谐器和二次消谐器并用的几咱综合消谐措施. By introducing the characteristics of eliminating ferroresonance of voltage transformer with primary harmonic eliminator in distribution network, this paper analyses the application of several methods of eliminating ferroresonance, and puts forward several comprehensive measures of eliminating harmonic with primary harmonic eliminator and secondary harmonic eliminator in the same distribution network. 配电网由到电磁式电压互感器饱和引起的铁磁谐振过压时有发生,近年来,电网中应用了多种新型消谐装置,这此消谐器因作用机理不同而各有所长,也各有局限性,因些对这些新型消谐装置进行分析和优化配置,既采取综合消谐措施以便达到最佳保护效果十分重要. Ferromagnetic resonance overvoltage caused by saturation of electromagnetic voltage transformer occurs frequently in distribution network. In recent years, a variety of new harmonic eliminators have been applied in power network. This harmonic eliminator has its own advantages and limitations because of its different mechanism of action. Because of these new harmonic eliminators are analyzed and optimized, comprehensive harmonic eliminating measures are adopted. In order to achieve the best protection effect is very important. 常用的一次消谐器特点 Characteristics of primary harmonic eliminators used in common use 一次消谐器,如LXQ-10一次消谐器,实际在是将非线性消谐电阻RO串接于电压互感器一次侧中性点与地之间,一次消谐器采用阻尼电阻消除谐振,电网正常运行时,一次消谐器上电压﹤500V,RO呈高电阻值,阻尼作用大,使谐振在起始阶断不易发展,当电网发生单相接地时,一次消谐器上电压较高(10KV电网值约为1.7-1.8KV)RO呈低值,可满足电压互感器开口三角电压不小于80V的绝缘监测要求,而且仍可阻尼消谐,当电网发生弧光接地时,RO仍然保持一定的阻值,限制互感器涌流,一次消谐器具有消除电压互感器饱和限制涌流两种功能,但应用存在局限性: Primary harmonic eliminator, such as LXQ-10 primary harmonic eliminator, is actually to connect the non-linear harmonic eliminator RO in series between the neutral point of the primary side of the voltage transformer and the ground. The primary harmonic eliminator uses damping resistance to eliminate resonance. When the power grid is in normal operation, the voltage on the primary harmonic eliminator is less than 500V, and the RO has a high resistance value, so the resonance is not easy to break at the initial stage. Development, when single-phase grounding occurs in power grid, the RO on primary harmonic eliminator is low (10KV network value is about 1.7-1.8KV), which can meet the insulation monitoring requirements of voltage transformer open triangle voltage not less than 80V, and can still damp harmonic elimination. When arc grounding occurs in power grid, RO still maintains a certain resistance value and limits the inrush current of transformer. The sub harmonic eliminator has two functions to eliminate the saturation of the voltage transformer and limit the inrush current, but there are limitations in its application. 1.中性点为半绝缘结构,只能直接接地安装的电压互感器无法使用 1. the neutral point is semi insulating structure, and the voltage transformer which can only be directly grounded can not be used. 2.其优点是一组电压互感器中性点只需装一台一次消谐器,节省成本. 2. its advantage is that a set of voltage transformer neutral point needs only one primary harmonic eliminator to save cost. 3.当发生单相接地故障时,电压互感器零序电压Uo的测量值有误差. 3. when the single phase earth fault occurs, the value of zero sequence voltage Uo of voltage transformer is error. 4.圆形的一次消谐器自身热容量有限,一般如没有尺寸要求建议选用热容量相对较大的方形LXQ-10一次消谐器. 4. The circular primary harmonic eliminator has limited heat capacity. If there is no size requirement, the square LXQ-10 primary harmonic eliminator with relatively large heat capacity is recommended. LXQ-10D带放电管一次消谐器适用于JDZJ等型号全绝缘电压互感器的消谐改进. The LXQ-10D band discharge tube primary harmonic eliminator is suitable for harmonic elimination of JDZJ and other types of fully insulated voltage transformers. |
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