KSEB Initiates Critical Upgrade for Peringalkuthu Hydroelectric Project
The Kerala State Electricity Board (KSEB) has taken a decisive step to address aging infrastructure at the Peringalkuthu hydroelectric project by planning to replace its penstocks and butterfly valves. These crucial components, originally commissioned between 1957 and 1960, are now approximately 65 years old and have developed serious defects that threaten the plant's operational safety and efficiency.
Formation of Expert Committee for Oversight
In response to these concerns, the KSEB board of directors, during a meeting held on March 17, resolved to constitute an expert committee. This panel is tasked with examining the detailed project report (DPR) submitted by the chief engineer and recommending further actions. The committee, chaired by Chief Engineer Vinod V with Deputy Chief Engineer Sreerekha K as convenor, includes specialists in civil and electrical engineering.
The committee's mandate involves conducting on-site inspections of the existing penstocks and valves, evaluating the technical and financial aspects of the replacement project, reviewing the DPR, suggesting necessary modifications, and submitting recommendations for administrative approval. This structured approach aims to ensure a thorough assessment before proceeding with the replacements.
Urgent Need for Replacement Identified
Recent inspections have revealed that the penstocks and four butterfly valves require immediate replacement to maintain safe operations. Leakages in the penstocks are particularly problematic, as they prevent adequate water flow to the generators, directly impacting power generation capacity. Although other machinery at the project was upgraded in the past, the penstocks and associated systems were not replaced at that time, leading to the current critical situation.
The Peringalkuthu hydroelectric project initially featured four generators, each with a capacity of 9 megawatts (MW). In 1999, an additional 16MW generator was installed under the 'Peringalkuthu Additional' scheme, boosting the plant's overall output. Currently, the project generates approximately 191 million units of electricity annually, highlighting its importance to Kerala's power grid.
Historical and Operational Context of the Project
The Peringalkuthu project has a rich history, with its dam constructed across the Chalakudy River in 1946 during the reign of Cochin ruler Parikshit Thampuran. Located inside a forest area upstream of the Vazhachal waterfalls, the dam stands 23 meters tall and is built using traditional stone masonry and surkhi (a traditional building material). At full capacity, it can store up to 32 million cubic meters of water.
Water from the dam is transported through penstocks to the powerhouse near the Malakkappara road, where it drives turbines to generate electricity. The power generated is transmitted via 110-kilovolt (kV) lines to the Chalakudy substation and to the Sholayar powerhouse in Tamil Nadu. Notably, the water discharged after power generation serves as the main source for the Athirappilly and Vazhachal waterfalls, adding an environmental and tourism dimension to the project's operations.
This upgrade initiative underscores KSEB's commitment to maintaining and enhancing the reliability of Kerala's hydroelectric infrastructure, ensuring continued power supply and safety standards in the region.
