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10 top Indian Power plants are highlighted in Power Magazine
The plants were highlighted in June in Power Magazine. Here are the details on the largest’. The Vindhyachal Thermal Power Station in the Singrauli district of Madhya Pradesh, with an installed capacity of 4,760MW, is currently the biggest thermal power plant in India. It is a coal-based power plant owned and operated by NTPC. Construction of the plant, which comprised 12 generating units (six 210MW units and six 500MW units), had begun in 1982. The first unit was commissioned in 1987 while the sixth 500MW was commissioned in April 2013. An additional 500MW unit was commissioned in August 2015, increasing the plant’s gross capacity from 4,260MW to 4,760MW. The plant uses coal from the NCL-operated Nigahi mine and water from the discharge canal of Singrauli Super Thermal Power Station. The turbine manufacturers for the Vindhyachal Thermal Power Station include Russian companies LMZ, Electrosila and the Indian BHEL. The 500MW units were supplied by BHEL.
Revision Date: 8/8/2019
Tags: 221112 - Fossil Fuel 化石燃料, 221118 - Other Electric Power , Power Magazine, India
Improving Plant Efficiency with Pump Performance and Condition Monitoring
Studies show pumps tend to be some of the more maintenance-intensive equipment in a plant, suffering a failure or some level of degraded operation on average every 12 months. Pumps in especially critical situations often have duplex and even triplex installations as backups, ready to switch over at a moment’s notice, such is their importance. Reactive maintenance, where it is necessary to fix something that has failed, costs 50% more than practicing predictive maintenance where problems can be detected and resolved before a failure. Pumps can be equipped with sensors to monitor condition and performance to ensure problems are detected as soon as possible so appropriate action can be taken…………... Over the last few years, the number of devices designed for equipment monitoring capable of operating on wireless networks has grown substantially. Some communicate using a plant’s Wi-Fi network, but a larger group has been designed to communicate via WirelessHART, the same network used by many types of wireless field instruments (Figure 2). The variety of low-power and low-bandwidth devices designed for these networks has grown enormously, and for all practical purposes, every type of monitoring device necessary for a full pump monitoring setup is available for use with WirelessHART networks.…………... Apps make it simple to perform real-time asset monitoring of a pump installation by identifying abnormal situations as they develop. Pre-packaged analytics evaluate health against unit history and industry norms, and the information is displayed via intuitive dashboards. All of this is possible with minimal configuration effort and no additional loading on the existing automation system. If desired, reporting and alarming functions can be added to external systems, but this is entirely optional.…………... New apps are available for health monitoring in conjunction with the wireless instrumentation, independent of the plant’s real-time automation system. These apps are easy to use because each is configured for a specific type of asset. Just as there are apps for pump monitoring, there are corresponding apps for other types of assets such as steam traps, heat exchangers, cooling towers, pressure relief devices, and more. This specialization helps deliver sophisticated analytics without having to create customized programming. The customization is already built into the platform, supporting fast implementation.……………
Revision Date: 11/29/2018
Tags: 221112 - Fossil Fuel 化石燃料, Emerson Automation Solutions, Pump, Wireless Network, Analyzer, Power Magazine
Advanced Process Control for optimizing Flue Gas Desulfurization
Yokogawa is improving plant efficiency by reducing pump horsepower while maintaining needed SO2 removal. The optimization system typically consists of three functions: enhanced regulatory control, model-based prediction, and process value prediction. The system uses these three functions to continuously determine the minimum required number of recirculation pumps in operation, and to calculate the setpoint for the limestone slurry flow PID (proportional-integral-derivative) control loop……………... Enhanced regulatory control governs the number of recirculation pumps in operation and calculates the slurry flow setpoint. It also calculates the optimal pH setpoint, using feed-forward control for some abnormal cases. Enhanced regulatory control also keeps track of the run time of each recirculation pump, and uses this data to equalize the operating times of the pumps.……………... This optimization system automatically adjusts to different coal types because it uses the inlet SO2 value as an input to the system. This value varies significantly based on the coal type and is an important parameter for optimizing control. The system also automatically adjusts for spray nozzle plugging and pump performance deterioration. Varying plant load is not a problem as the optimization system works well in the range from low to full load.……………... A 700-MW coal-fired power plant in Japan implemented the optimization system described above. This plant runs about 300 days per year at baseload, and is not in operation for the other 65 days of the year. The energy savings realized by running only the required number of recirculation pumps was 12.4% of the unit’s total house load, equating to about $900,000 in energy savings per year based on market conditions in Japan. Another benefit was reduced pump run times, which resulted in lower pump maintenance costs and extended pump life. A third benefit was less limestone usage.………………
Revision Date: 11/29/2018
Tags: Yokogawa China, Power Magazine