Determine if there is an MPT tap that would bring the low side voltage as stated above. If not, change capacitor bank size and repeat the first case. Generally there is no need to adjust the capacitor bank size and the low side voltage above is the OLTC set point.

The OLTC control scheme is designed to correct the long-term voltage deviations based on model predictive control (MPC) while minimizing the number of operations. The local controllers send the calculated reactive power references of DG and STATCOMs to the OLTC controller, which achieves distributed coordinated voltage control and mitigates the ...

2023年1月4日 · SMRs have load-following capability, reactive power compensation and supplementary voltage regulation capability; which is achieved using the main transformer’s on-load tap changer (OLTC). This paper proposes application of advanced machine learning-based recurrent neural networks (RNN) for the SMR main transformer OLTC control by leveraging ...

2016年9月1日 · The OLTC operate by changing the number of turns in one winding of the transformer to keep the transformer output voltage within predicted limits. The OLTCs are motorized mechanical switching arrangements that adjust the transformer turns ratio, typically in steps of 1.25% or 1.43%, whilst the transformers are in use and carrying a load [2] .

2017年10月18日 · On-Load Tap Changers (OLTC) generate transients in power transformer voltage regulation, these transients are analyzed to determine the OLTC condition, and find malfunctions in order to prevent system failures. OLTC conditional analysis is so relevant, because 40% of power transformers failures in the world come from failures in this device.

2014年7月8日 · In this paper, an intelligent on-load tap changer (OLTC) control scheme is introduced that is based on the changes of the transformer primary side voltage and current caused by the OLTC action. It is shown that the changes in the voltage and current can be used to estimate the supply system Thevenin impedance and to monitor the OLTC stability ...

2020年7月6日 · Owing to its prediction capabilities, MPC has been modelled for voltage regulation in active distribution networks (ADNs) in the presence of OLTC and DG units . Here, the controller coordinately modulates the DG units' output and the voltage set-point of the OLTC to maintain the voltages within acceptable values.

On load tap changers (OLTCs) maintain a constant transformer secondary voltage given changing primary voltage and transformer load. A common OLTC arrangement has 16 taps above and below the nominal tap (33 total taps), and each tap adjusts the …

2013年8月9日 · 有载分接开关的工作原理，就是在变压器的绕组中引出若干个分接抽头，通过有载调压开关，在保证不切断负荷电流的情况下，由一个分接头切换到另一个分接头，以达到变换绕组的有效匝数，即改变变压器的变压比。 有载分接开关的核心是采用了过渡电路。 用这种方式切换，其装置的材料消耗少，变压器的体积增加的不多，电压可以做的很高，容量也可做的很大。 现场常用的油浸电阻式有载分接开关由调压回路、选择电路、过渡电阻、驱动、和控制电路及各种 …

Load Tap-Changers (OLTC). The focus is on the extended regulation range offered by OLTC for variable shunt reactor along with the design challenges of the reactor. For the phase shifting transformer, the basic principle of phase angle regulation, the design and its applications will be discussed. As the OLTC plays an important role in PST,