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Frequency-conversion main power supply system for thermal power plant

A technology for thermal power plants and general power supplies, applied in emergency power supply arrangements, electrical components, circuit devices, etc., can solve problems such as hindering promotion and high prices, and achieve the effects of high reliability and small footprint

Active Publication Date: 2015-07-15
冯伟忠
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

With the development of technology, there are some products that can better solve the above problems, but the high price of these products hinders their further promotion

Method used

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  • Frequency-conversion main power supply system for thermal power plant

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Embodiment Construction

[0020] Such as figure 1 As shown, the present invention is a novel frequency conversion total power supply system for a thermal power plant, which includes a steam turbine T, a generator G, a frequency conversion bus a and a power frequency bus b. Auxiliary M 1 ,M 2 ,M 3 ... M n Through the switches 1a, 2a, 3a, ..., na is connected to the frequency conversion bus a, through 1b, 2b, 3b ..., nb is connected to the power frequency bus b. By adjusting the opening of the steam turbine inlet valve V, the speed of the steam turbine can be changed, thereby changing the frequency of the alternating current output by the generator. This generator provides variable frequency power to all auxiliary machines connected to the same busbar.

[0021] In the embodiment of the present invention, the auxiliary machine of the present invention may also be provided with adjustment mechanisms such as baffles or valves. These adjustment mechanisms can fine-tune the operating conditions of auxil...

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Abstract

The invention discloses a novel frequency-conversion main power supply system for a thermal power plant. The novel frequency-conversion main power supply system comprises a steam turbine with an adjustable rotating speed, a generator, a frequency-conversion bus, a power-frequency bus and an auxiliary engine which is connected with the frequency-conversion bus and the power-frequency bus. The rotating speed of the steam turbine is changed by changing a steam inlet volume of the steam turbine so as to realize the purpose of changing the frequency of the power supply of the auxiliary engine. The novel frequency-conversion main power supply system provided by the invention has the advantages that an additional frequency converter is unnecessary, the system is simple, the problem caused by using the frequency converter is solved, the reliability is high and the occupied space is less.

Description

technical field [0001] The invention relates to a variable frequency power supply system, in particular to a novel frequency variable total power supply system used in a thermal power plant. Background technique [0002] In the production process of a thermal power plant, water is heated in a boiler and turned into steam, and then the steam is used to drive the steam turbine to rotate, which drives the generator to rotate, and converts the chemical energy of the fuel into electrical energy. In the process of power generation, a large number of rotating auxiliary machines such as pumps and fans in thermal power plants need to consume a large amount of electric energy. The current general practice is to draw a part of the generated electricity through the plant transformer for use by the plant auxiliary machine. [0003] In the engineering design of thermal power plants, the capacity of auxiliary machines is generally selected according to the maximum demand plus a certain ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J9/04H02K7/18
Inventor 冯伟忠
Owner 冯伟忠
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