变电站母线电压和无功智能控制

Intelligent Control of Bus Voltage and Reactive Power in Substation

针对变压器并列中有载调压分接控制的循环电流制问题,设计循环电流检测分析模型,定量分离出循环电流,以此提出变压器并列的最小循环电流法及无功平衡法,通过对有载调压分接头的控制将循环电流降低到最小或使流经变压器的无功流根据变压器的容量达到平衡。该控制方法对并列变压器的数量和容量等参数没有限制,可将并列的条件扩展到高压侧分列及分接头开关挡位数不等的应用。文章对基于循环电流控制原理的变压器电压控制装置的基本设计方案以及同地区电压/无功控制系统AVC的协调运行等进行了论述。

In order to solve the problem of circulating current system with load regulating and voltage control in transformer parallel,a cyclic current detection and analysis model is designed,and circulating current is separated quantitatively.In order to bring forward the minimum circulating current method and reactive balance method of transformer parallel,the circulating current is reduced to the minimum by the control of the load tap changer.The reactive current flowing through the transformer can be balanced according to the capacity of the transformer.The control method has no limitation on the number and capacity of the parallel transformer,and can extend the parallel conditions to the application of the high voltage side disalignment and the unequal switch number of the tap changer.The basic design scheme of the transformer voltage control device based on the principle of circulating current control and the coordinated operation of the voltage/reactive power control system AVC in the same area are discussed in this paper.