SOLUTIONS

Proven success in power quality solutions.
Delivering reliable performance to strengthen your competitive edge

Proven success in power quality solutions. Delivering reliable performance to strengthen your competitive edge

Power Quality Solution for School Industry

Ikonmac’s power quality solutions implemented in a school environment.

Industry Overview

With the introduction of modern teaching methods like electronic libraries and improvements in facilities such as intelligent water systems, variable frequency air conditioning, and energy-efficient lighting, the school’s load now includes more nonlinear devices. These devices cause power quality issues, including harmonic pollution, increased reactive power, and three-phase imbalances, which negatively affect the distribution system. Managing harmonics can enhance system stability, extend the lifespan of equipment, reduce failure rates, and minimize safety risks.

Power Quality Issues

The school’s primary load is lighting, with most fixtures using fluorescent lights that generate significant 3rd-order harmonics. Additionally, heavy use of air conditioning and elevators, which are equipped with variable frequency devices, produces substantial 5th and 7th-order harmonics. The school also has an information center and multimedia center, where computers and UPS power supplies generate considerable 3rd, 5th, and 7th-order harmonics. Moreover, the experimental buildings, housing various equipment with nonlinear components, primarily generate low-order harmonics, particularly the 5th and 7th orders.

Power Quality Challenges

Power grid harmonics degrade the school’s electrical quality, affecting supply reliability and potentially causing outages. Harmonic currents increase load current, occupy transformer capacity, and reduce system efficiency. They also raise transformer and transmission line temperatures, shortening equipment lifespan and creating fire risks. Given the school’s high population density, the demand for power quality and safety is critical. Therefore, harmonics in the distribution system must be promptly addressed and mitigated.

Solution

The harmonics in the school mainly consist of low-order harmonics such as the 3rd, 5th, and 7th orders, with relatively small load currents and harmonic values. The IKM-SVG series Static Var Generator (SVG) can compensate for reactive power, balance three-phase currents, and mitigate harmonics from the 2nd to the 25th orders, significantly improving the power quality of the school’s distribution system.

For teaching buildings and dormitories, a centralized mitigation solution can be implemented by adding SVGs to the main power lines for compensation and filtering. In laboratory buildings, libraries, and information centers, small-capacity SVGs can be installed in distribution boxes on each floor for localized compensation and harmonic mitigation.

SUCCESSFUL SCHOOL CASES

No.	City	Project	Date	Solution
1	Shanghai	Brain Science Institute Reactive Power Compensation Project	May 2024	SVG
2	Jiangsu	Wuxi Xiehe Bilingual International School Harmonic Treatment Project	February 2024	AHF
3	Tianjin	Binhai Advanced Manufacturing Training Center Harmonic Treatment Project	March 2023	AHF
4	Guangdong	Foshan Nanhai Experimental School Reactive Power Compensation Project	September 2022	SVG/AHF
5	Hebei	Hengshui Middle School Harmonic Treatment Project, Hengshui City, Hebei	January 2022	AHF
6	Anhui	Hefei Rainbow Middle School Harmonic Treatment Project	July 2021	AHF
7	Chongqing	Hechuan Beixin Bashu Middle School Active Filter Project	September 2020	AHF
8	Fujian	Xiamen Canghai Experimental School Reactive Power Compensation Project	July 2018	SVG
9	Zhejiang	Zhejiang University of Traditional Chinese Medicine Distribution Room Active Filter Project	May 2018	AHF

SUCCESSFUL SCHOOL CASES

Date	Project	Solution
May 2024	Brain Science Institute	SVG
Feb 2024	Wuxi Harmonic Treatment Project	AHF
Mar 2023	Binhai Training Center	AHF
Sep 2022	Foshan Reactive Power Project	SVG/AHF
Jan 2022	Hengshui Harmonic Treatment Project	AHF
Jul 2021	Hefei Harmonic Treatment Project	AHF
Sep 2020	Hechuan Beixin Bashu Middle School Active Filter Project	AHF
Jul 2018	Xiamen School Reactive Power Project	SVG
May 2018	Zhejiang University Distribution Room	AHF