Madura island is very potential source of energy, but until now economic growth is still low due to not maximum exploration on there. Peak load in Madura Island currently is only 75 MW, while in the day the load reaches 19,5 MW only. This condition reveals that electricity has not been used optimally. The characteristic of electricity customers in Madura is very unique, the biggest part of electricity customers is residential customer. Electric energy used mostly as lighting in the night. And this load characteristic is predicted will continue be happening until five to ten years ahead. That situation will impacts in a financial loss to PLN.
History and Future
Madura Island, which comprises 5.3 thousand square kilometres and is inhabited by 3.1 million people, belongs to the East Java Province of Indonesia. Proximity to the congested Surabaya city-port makes Madura enticing as a place to accommodate the expansion of port facilities and industrial estates operating in Surabaya. Efforts to support industrial development have been made by a 6 km connecting bridge as well.
It has been predicted to reach 119 to 136 MW by 2007 and 221 to 292 MW by 2015. Since electricity to the island is connected to the Jawa-Bali grid, system expansion can be solved within the Jawa-Bali expansion-planning scheme. In 1998, however, the breakage of the submarine power cables resulted in a blackout of the whole island for forty days, which encouraged planners to launch the idea of a self-reliance scenario within the island.
Fossil power plants 2 x 100 MW in Pamekasan Madura are sought to become candidate solutions and a nuclear alternative comes into consideration for 2015. Their are four water municipalities (Regencies), which in total produce clean water equivalent to 120 L/capita/day for only 5.8% of the inhabitants with a distribution loss of 18-35%. It is obvious that water demand is suppressed and that the quantity required, on which to base planned expansion, depends upon the amount of industrial development. The present water capacity required to meet the four Regencies' demands ranges from 18,000-23,000 m³/day. However, since water supply solutions are limited to each locality (and not integrated for the whole of Madura), the expansion plan can only start by aiming for a modest capacity increase, which is sought to be around 4,000 m³/day in 2007 growing over the years with unit additions. Should a power and desalination plant be built, the rejected brine would become a useful input to salt production, enabling traditional methods (used on the island for a long time) to lower costs by 19% and create 36% more efficient land-use. A preliminary economic assessment to this date denotes a gas-fuelled combined cycle plant to be the best candidate to power the project, thanks to the availability of gas basins offshore near to Madura Island. This nuclear alternative is sought to come into competition with the fossil ones in 2015, being the nearest possible introduction to the island deployment. Additional requirements, however, to the design of the nuclear plant and its safety features to accommodate the local environment are crucial. Tripartite cooperation with the KAERI and the IAEA is proceeding to provide assistance with the study of technologies and expertise for the project.
Related link :
A nuclear option for power and desalination on Madura Island
Everyday operator do the same job, sometimes boring activity could make work mistake. We avoid that by fish. Beautifull fish can make brain fresh. We can put it at meeting room and CCR.
Television, music also fitness equipment can be alternative choice to reduce employee stress.
Make work atmosphere like our home to reduce employee stress.
By Install picture or something...
Do vacation to the county. Fresh air can make fresh brain.
Lombok island is the best choice.
Don't look her body even though you can or you want it.
Or looking the beautiful actress on Korean drama.
Focus on your work.
He..he.. back to the work!
And become Top Operator.
Boiler over firing phenomenon already describe on http://anto-hendarto.blogspot.com/2014/01/boiler-over-fire.html.
As standard operating procedure while any mode of start up power plant that during silica purging, we maintain the load 350MWgross with 4 mills in service. The Unit Master control for load 350MWgross can be shown picture above.
From load set 350MWgross, Main Steam pressure set point is 91.97 Bar, Turbine master position 57.64% and Coal flow demand 133.21 T/h as interpolate calculation below.
The Unit Master logic if no feed back value can be shown as picture below.
The Unit Master logic actual has feedback value caused by load actual 357MWgross (7MW overshoot). This time is stat boiler over firing and shown that Turbine master position can response from overshoot but the boiler master is delay 30min. Coal flow consumption just need around 133.21 T/h but get overshoot until 190.2 T/h, and the turbine master position response to 100% make generator load overshoot until 450MW (350MW set).
This caused by boiler control only use proportional - integral control and every 120s the integral control send the feedback. I needs longer time to get steady state and derivative control should be in consideration when power plant on very hot start at mode.
Please visit Buchholz Relay Alarm Part 6 for previews explanation.
The cause of gas accumulation in the Buchholz Relay was thought to be suction effect by oil pump operation but after transformer tank was pressurized 0.015Mpa through conservator rubber bag with nitrogen gas confirm the leakage.
Minor oil leakage was found at the flange of LV (2W) bushing. And the other points such as oil pipe flanges and air release vents no oil leakage was found. Toshiba recommends replacing LV bushing gaskets (all three phases) and for the safety shake, O-ring of upper oil pipe air vent plug is also recommended to replace.
After conservator rubber bag replacement done, and transformer cooler system put to in service for 4 hours that confirm no gas appear on Buchholz Relay (oil insulating already purified).