Electrification is spreading and that will increase the focus on power quality
12 Feb 2020
Electrical engineers can expect substantial challenges in the years ahead, warns REO UK’s Steve Hughes. Here, he outlines some of the biggest…
In the past 30 years, we’ve seen more industry sectors adopt electrification. However, the abundance of devices in use today leads to electrical grids with widespread power quality problems and electrical issues. As new technologies such as electric vehicles and surgical robots take over the market, the challenges will only continue to mount.
In 2018, we saw global EV sales surpass two million units for the first time; twice the amount sold in 2017. With the possible threats of catastrophic climate change and resource depletion, adopting renewables and achieving net-zero carbon emissions are high on the agenda.
Heavy investment in infrastructure and the implementation of charging networks are required to keep up with EV demand. However, until renewable generation capacity meets EV demand, these efforts will simply place a growing burden on fossil fuel generation, compounding the problem further.
Another transformative development is the rise of the industrial internet of things (IIoT), which has had a real impact on how businesses operate. By 2020, there will be more than 30 billion IoT devices in operation. However, these devices will provide no value in terms of collecting real-time data without a stable power supply.
These might initially sound like drastically different areas, but they both serve as examples of the growing electrification across all industry segments and facets of society. The electrification of applications and processes has grown in popularity in the past 30 years, as we’ve seen with the increased electrification of the transport and medical sectors.
Maintaining good power quality is pivotal to the efficiency of equipment. So too is an understanding of the problems that cause electrical issues
By 2050, we anticipate that more industry segments will have adopted electrification in ways that fundamentally change the nature of the sector. In doing this, businesses will place even greater importance on good power quality.
Maintaining good power quality is pivotal to the efficiency of equipment. So too is an understanding of the problems that cause electrical issues, like harmonic currents from power supplies that may interfere with sensitive devices, or even cause failures.
While harmonic currents are not a new issue for the electrical industry, the growing number of sources of electrical noise is making them a bigger risk than ever before — both in terms of their proliferation and their impact. As such, it is becoming increasingly important that electrical engineers use technology to limit the impact of harmonics, such as harmonic current filters.
Likewise, design engineers can ensure all variable speed drives (VSDs) are equipped with effective filters and mains chokes to maintain a clean sinusoidal wave and to safeguard against power quality problems. For electronics, investing in high quality switch mode power supplies (SMPSs) and ensuring that high quality toroidal transformers are used wherever possible can also reduce high frequency electrical noise.
And although it’s a problem that has existed for years, tackling the risk of poor power quality is undoubtedly one of the biggest challenges for the electrical industry in the years ahead. As electricity plays an increasingly important role across sectors, the impact of failure becomes even more significant.
There are also more risks from other applications, such as interference generated by high-frequency switching at a mains junction near a solar farm affecting the quality of power fed into construction equipment at a site nearby.