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High-efficiency steam-electricity hybrid power speed regulation unit

A hybrid power and speed regulation technology, applied in electric components, control generators, electrical components, etc., can solve the problems of unsteady combustion of boilers and large efficiency loss, and achieve increased steam extraction, improved thermal cycle efficiency, and payback period. short effect

Pending Publication Date: 2018-08-28
中国船舶重工集团公司第七0三研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of new energy power, the country requires thermal power plants to participate in peak regulation, with new energy as the basic load, coupled with the actual situation of domestic power plant power capacity surplus, the load of power plants is generally low, generally up to 40%~70%, The long-term low load of the power station has led to the long-term operation of the fan unit and the water pump unit under low-load conditions, with large horses and small carts, resulting in a large loss of efficiency
In addition, in recent years, the state requires thermal power plants to carry out deep peak regulation, and the minimum load is even as low as 20%, which further aggravates the efficiency loss of the thermal cycle system of the power station. At present, the actual coal type is generally inferior to the designed coal type in China. The boiler cannot even burn stably

Method used

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  • High-efficiency steam-electricity hybrid power speed regulation unit
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  • High-efficiency steam-electricity hybrid power speed regulation unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example as Figure 1-5 As shown, a high-efficiency steam-electric hybrid speed-regulating unit involved in this embodiment includes a steam turbine 1, a gearbox 2, a synchronous automatic clutch 3, a motor 4, a load 6, a speed-regulating device, the output shaft of the steam turbine 1 and the gearbox 2 input shaft connection, gearbox 2 output shaft and synchronous automatic clutch 3 input shaft connection, synchronous automatic clutch 3 output shaft and motor 4 and load 6 combination assembly, motor 4 and load 6 combination assembly and speed control equipment Matching connection, wherein the motor 4 is connected to the power grid; when the specific unit is started, the motor 4 starts the load 6 through the speed regulating device. At this time, the steam turbine 1 is not started, and is decoupled from the unit through the synchronous automatic clutch 3. When the conditions for rushing are met, and the rotor speed is greater than or equal to the rotor speed of motor 4, ...

Embodiment 2

[0032] Embodiment two, such as figure 1 As shown, the load 6 can be a fan or a water pump, the motor 4 is a double-shaft extension structure, the output shaft of the steam turbine 1 is connected to the input shaft of the gearbox 2, the output shaft of the gearbox 2 is connected to the input shaft of the synchronous automatic clutch 3, and the synchronous automatic clutch 3 is connected. The output shaft of the clutch 3 is connected to the input shaft of the motor 4, the speed regulating device is a full-power frequency converter 5, the motor 4 is connected to the power grid through the full-power frequency converter 5, and the output shaft of the motor 4 is connected to the load 6; specifically, the unit starts At this time, the motor 4 softly starts the load 6 through the full-power frequency converter 5. At this time, the steam turbine 1 is not started, and is decoupled from the unit through the synchronous automatic clutch 3. The unit is equivalent to a conventional variable...

Embodiment 3

[0034] Embodiment three, such as figure 2As shown, the load 6 is a double shaft extension structure, the output shaft of the steam turbine 1 is connected to the input shaft of the gearbox 2, the output shaft of the gearbox 2 is connected to the input shaft of the synchronous automatic clutch 3, and the output shaft of the synchronous automatic clutch 3 is connected to the left side of the load 6 The side input shaft is connected, the input shaft of the right load 6 is connected to the speed regulating device, the speed regulating device is connected to the motor 4, and the motor 4 is directly connected to the power grid. In this embodiment, the speed regulating device is a planetary hydraulic speed regulating / constant speed device 7 Specifically, when the unit starts, the motor 4 starts the load 6 through the planetary hydraulic speed control / constant speed device 7. At this time, the steam turbine 1 is not started, and is decoupled from the unit through the synchronous automa...

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Abstract

The invention relates to the field of speed regulation of a power station fan and a water pump unit, in particular to a high-efficiency steam-electricity hybrid power speed regulation unit. The unit includes a steam turbine, a gear box, a synchronous automatic clutch, a motor, a full-power frequency converter, a load, a planetary hydraulic speed regulation / constant speed device, and a planetary variable frequency speed regulation / constant speed device. Through the different arrangements and applications of the device, the hybrid power speed regulation driving unit is realized, the unit integrates the advantages of the steam-driving and electricity-driving parties, has the characteristics of being energy-saving, efficient, high in reliability, saving in investment, and is particularly suitable for actual conditions of peak shaving and future deep peak shaving operation of a current power station.

Description

technical field [0001] The invention relates to the field of speed regulation of fan and water pump units in power stations, in particular to a high-efficiency steam-electric hybrid speed regulation unit. Background technique [0002] Fan and water pump units are widely used in power station systems and are the largest energy-consuming equipment in power station systems. Typical fan and water pump units include induced draft units, primary fan units, supply air units, boiler feed water pump units, and circulating water pump units. In order to reduce energy consumption, fans and pumps generally operate at variable speeds (except for dynamic fans). According to conventional design, when the power station is at or near full load, the efficiency of the fans and pumps is the highest. With the development of new energy power, the country requires thermal power plants to participate in peak regulation, with new energy as the basic load, coupled with the actual situation of domestic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K7/18H02K7/116H02P9/04H02P9/06H02P101/20H02P101/25
CPCH02K7/1823H02K7/116H02P9/04H02P9/06H02P2101/20H02P2101/25
Inventor 朱振荣苗强杨德荣刘永恒邓广琳罗萌王立军周金阳冯宇亮刘文军张玉厚张哲宏
Owner 中国船舶重工集团公司第七0三研究所
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