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在变电站建设中,现普遍采用有载调压变压器。在电网系统电压发生波动时,变压器可以自动调档,满足电网正常稳定运行。在变压器自动调档时,不希望因变压器自动调档造成变压器差流超限。电力系统的电压是衡量电能质量的重要指标,电压能否维持在合格的范围,不仅影响电力工业本身的安全,而且关系到千家万户。系统的无功功率对电压影响极大,维持电网正常运行下的无功功率平衡是改善和提高电压质量的基本条件。为调整系统电压合格,控制无功潮流合理平衡,提高变电所经济运行水平,变电站一般会装设电压无功控制器,下面就VQC的性能特点、控制原理、控制参数及运行评价作一介绍,仅供参考。
In the substation construction, is now commonly used on-load tap-changer. Voltage fluctuations in the grid system, the transformer can automatically adjust the file to meet the normal and stable operation of the grid. In the automatic transfer of the transformer, do not want to automatically shift the transformer caused by the transformer differential current overrun. The voltage of the power system is an important indicator to measure the power quality. Whether the voltage can be maintained in the qualified range will not only affect the safety of the power industry itself, but also affect tens of thousands of households. The reactive power of the system has great influence on the voltage. Maintaining the reactive power balance under the normal operation of the power grid is the basic condition for improving and improving the voltage quality. In order to adjust the voltage of the system, control the reasonable balance of the reactive power flow and improve the economic operation level of the substation, the substation will usually install the voltage and reactive power controller. The following introduces the performance characteristics, control principle, control parameters and operation evaluation of VQC ,for reference only.