Dc speed regulation drive drilling rig
update：2015-03-18 17:46 Click：times
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Dc speed regulation drive drilling rig type drilling rig (D) due to the load characteristic and control performance is good, the cost is moderate, has been widely used in oil drilling industry, due to the system for SCR dc speed control, m
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Dc speed regulation drive rig123.net' target='_blank'>drilling rig type drilling rig (D) due to the load characteristic and control performance is good, the cost is moderate, has been widely used in oil drilling industry, due to the system for SCR dc speed control, main load for drawworks, rotary table and mud pump, alternator, etc., so the system has the following features:(1) the reactive current
(2) low power factor
(3) the reactive change fast
(4) the voltage fluctuation
(5) current harmonic
(6) distortion rate is high
(7) high voltage distortion rate
(8) the load change is big
The company according to the characteristics of the system is successfully developed and supporting the use of the active dynamic harmonic and reactive power compensation device, the product has been successfully put into use in 70 d drill, produced a large economic benefit, users get the praise.At present, the device is the domestic first active dynamic harmonic and reactive power compensation device, chongqing in sinopec southwest petroleum drilling companies of 70138 drilling crew.The device by the static var generator (SVG) and active power filter (APF), is a set of bus communication network, real-time intelligent on-line monitor, touch screen control, time domain transform current (TTA), harmonic dynamic management, dynamic power factor compensation, high speed data operation (DSP), discrete Fourier transform (DFT), and other cutting-edge technology, advanced power electronic equipment, high speed switching devices, products, is currently the most advanced technology of compensation than the passive components of the compensation device, has the following advantages:
(1) their low dissipation, accounting for 2%;(using passive components loss compensation device itself is more than 15% of electricity is not obvious, compared to the passive components of the compensation device, active products of the company power saving effect is obvious, every month more than passive components of compensation device to save one hundred and eighty thousand yuan of above, more than a year, save two million two hundred thousand yuan of above.)
(2) save equipment investment;(70 d rig equipped with four general carter, diesel generator, under the condition of the maximum load, generally 3 to enable the spare one; and with active products of the company, under the condition of maximum load, only 2 sets, spare one, save the cost of purchasing carter diesel generator 1, more than $300000, and 300000, at the same time to save the cost of purchasing interconnection device and a single diesel generator maintenance cost number.)
(3) will not happen to the power grid parallel resonance;(using passive components of compensation device in the trip, will burn their own equipment can even burn down all other electrical equipment in the power grid, and the company's products, no active this risk)
(4) is not sensitive to the grid frequency fluctuation;
(5) devices to limit the output current automatically, by over current burned;
(6) stepless adjustment, there will be no compensation;Technology is reliable, low failure rate.
(7) fast response;(using passive components of compensation device during tripping, slow response, and can't stepless adjustment, often through or owe, tonic and equipment trip, burning, etc occur frequently, don't adapt to the working condition of oil field trip).
The field test: 70 d rig under the situation of power supply, before put into the equipment, the total voltage harmonic THDV > 28%, the power grid harmonic current THDI > 25%, the system power factor in (0.37 0.57), monthly pay reactive fine count is in 370000-550000.In the equipment due to the increasing power factor to 0.9 above, after a month of electricity and energy metering charges only.Total voltage harmonic, total harmonic current value dropped by 16%, greatly improve the power quality.
70 d drill in diesel generator set power supply situation, after put into the device, will improve the ability to active output and reduce the amount of weaver diesel generating set, reduce fuel consumption.
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