Iranian Researchers Produce Protective Relays for High-Voltage Substations
In electrical engineering, especially in electricity transmission and distribution networks, a protective relay is used to play as a circuit breaker when a fault is detected. In these systems, protection needs to be provided against various conditions like overcurrent, overvoltage, reverse power flow, over-frequency, and under-frequency.
Mohammad Hassan Zahedi, a member of the technological team located in the Science and Technology Park of Tehran University told Iranian media that he and his teammates have worked on producing testers and voltage measuring equipment in substations.
He said the protective relays is one of the products made in their company, adding, “We declare that we are able to supply all the protective relays needed at electrical distribution substations along with the protocols required by the substations.”
A substation is a part of an electrical generation, transmission, and distribution system. Substations transform voltage from high to low or vice versa. It actualy performs several important functions in power transmission.
Zahedi described protective relays as having hardware equipment that come with algorithms adding, “Using this equipment, we measure voltage parameters and a series of digital signals, and with the help of implemented protection algorithms, we can detect all types of faults that occur in the network and issue a power cut order accordingly.”
The researcher stated that various relays are used in high-voltage substations, adding, “We can produce different types of relays with different applications for high-voltage sub-stations.”
High voltage substations are points in the power system where power can be pooled from generating sources, distributed and transformed, and delivered to the load points. Substations are interconnected with each other, so that the power system becomes a meshed network.
He said that their produced equipment has reached the commercialization level, adding, “So far, we have commercialized more than 3,000 different protective relays.”
According to the researcher, they have produced a new generation of relays that has not been commercialized yet.
“This equipment used to be imported until five years ago, but now several Iranian companies, including our company, started producing it inside the country,” Zahedi continued.
Zahedi went on to say that ministry of energy and its subsidiaries such as regional electricity, distribution companies and oil and gas companies are main customers of his company's products.
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