## 1 Introduction  
In recent years, the use of power electronic converters as interfaces for domestic and industrial loads has increased exponentially. Wind power applications, solar photovoltaic generators, electric vehicles, and battery storage chargers are the most common applications of power electronic converters [1]. These self-commutating converters, due to their numerous switching states, have switching frequencies in the kilohertz (kHz) band range and produce switching harmonic frequencies above 2 kHz [2]. Unfortunately, very little research has been conducted, and there are few regulations on such frequency ranges. Supraharmonic frequency is a term describing harmonic frequencies between 2 and 150 kHz and was introduced by the IEEE at their PES conference in 2013 [3]. The presence of supraharmonic frequencies poses threats to power electronic converters [4]. Supraharmonic interference received less attention due to the limited use of fast switching converters in the past [5]. But with the recent high demand for electric vehicles, wireless and fast battery charging stations, variable-speed drives, and electronically controlled lamps [6], there is a need to increase research in this area. Table 1 shows the operating frequency ranges of electronic converters used for selected domestic and industrial loads. Active power filters are preferred for harmonic compensation due to their compatibility and smaller weight and size [7; 8; 9; 10]. Traditional passive filters may not be practical in applications where size and weight are of much concern. The IEEE Std. 519-2022 recommends an acceptable 5% THDi harmonic current distortion. Hence, the average attenuation of a passive filter should be 26 dB during maximum currents and 32 dB during minimum currents. Passive filter components based on the above are too large and bulky in applications where size and weight are of much concern. The minimum weight of a similar filter with 107 amperes of nominal choke current from the Schneider electronics 'Altivar61' line chokes catalogue for a three-phase source at 380 to 480 V and 50/60 Hz is 16 kg [11], which is too large for applications in aircraft, ships, electric vehicles, etc. Active harmonic filters on their own may not be an economically feasible option for higher-frequency compensation. Hybrid harmonic filters are the most viable option for supraharmonic-frequency compensation [12]. Using hybrid harmonic compensation, the parallel combination of a passive L-C filter and a shunt active power harmonic filter is proposed. With this, the passive filter is designed to attenuate 60% of the supraharmonic frequencies. The HCC method, due to the stability and faster dynamic responses of HCCs during transient behaviors, is the most preferred pulse width modulation (PWM) control technique for active power filters. However, the variable nature of the HCC switching frequency increases switching oscillations, electromagnetic interference (EMI), and difficulty in active filter design. Most research works are on fixed-frequency HCCs for low-frequency applications [13; 14; 15; 16]. The principle of fixed-frequency HCCs is used to define a variable hysteresis band for each leg of the VSC, thereby maintaining a nearly constant switching frequency. The behaviors of HCCs in supraharmonic frequency ranges are unknown, and not enough research has been conducted on this topic. This leaves a knowledge gap related to the feasibility of HCCs for higher-switching-frequency converters as well as the switches appropriate for its realization. This article bridges this knowledge gap and presents a novel mathematical expression for estimating the maximum switching frequency of an HCC for hybrid active power filters (HCC-HAPF). This article presents an improved model for implementing fixed-frequency HCCs and explores its realization using metal-oxide-semiconductor field-effect transistors (MOSFETs). The dV/dt and dl/dt are analyzed, as they are the major causes of oscillations, overshoots, and EMI during higher-frequency switching.