Analytical model of AC contactors for studying response mechanism to multi‐dimensional voltage sag characteristics and its novel applications

Practical test method for the sensitivity of programmable logic controller to voltage sags and short interruptions

“…The core type of this ACC is Double E type, and the manufacture is Siemens. It is tested under POW of 0°, VTC of 0° POW may be non‐monotonic, which is shown in the published ACC test references [9, 10].…”

“…Voltage sag is one of the most serious power quality phenomena, leading to the sensitive devices tripping and malfunction, and causing the huge financial losses of the industry users [1–6]. The sensitive devices that have been widely known to include a personal computer (PC) [6], AC adjustable speed drive (ASD) [7, 8], AC coil contactor (ACC) [9–12] and programmable logic controller (PLC) [13]. PLC, which is applied as the process control device typically, may trip the industrial process and lead to an enormous loss under voltage sag and short interruption [14, 15].…”

Practical Analytical Model of Adjustable Speed Drive for Tolerance Ability Evaluation of Transient Low Voltage Disturbance

“…tests [12]- [15]. Thus, IEEE has recommended some standard test methods, including the top-down, the left-right, and the box-in test strategies [16].…”

“…For ACC and PLC, some researchers have used the working principle of equipment to guide VTC testing [14], [15], [18]. In [15], based on the analytical model of ACC, the researchers gave a method to quickly estimate the contour of VTC, which can effectively guide the testing work of VTC. Thus, studying the response mechanism of ASD to transient low-voltage disturbances can also be helpful to improve the test strategy of VTC.…”

Voltage sag/swell waveform analysis method based on multi‐dimension characterisation

“…The reason is that, besides magnitude and duration, some equipment may be sensitive to additional characteristics [4]. As a result, two sag events with the same basic characteristics may have totally different impacts on equipment, making related assessments even more difficult [5, 6]. Besides, more characteristics of waveform are also required to extract information about the system operation status and underlying causes of sag evens [7].…”