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ORC system starting grid-connected system and method

A start-up and organic technology, applied in the direction of mechanical equipment, steam engine devices, engine components, etc., can solve problems such as various system configurations, difficult operation and maintenance, and complex control, so as to reduce complexity, reduce equipment configuration, and speed up start-up The effect of grid connection process

Active Publication Date: 2022-06-28
安徽润安思变能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing small and medium-sized waste heat generators use synchronous generators, synchronous cabinets, control cabinets, electrical switch cabinets, and electro-hydraulic speed control systems for grid-connected power feeding. Dimensionally difficult problem

Method used

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  • ORC system starting grid-connected system and method
  • ORC system starting grid-connected system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] see figure 1 As shown, an ORC system startup and grid-connected system includes an organic Rankine cycle unit and a grid-connected switch cabinet 2. The organic Rankine cycle unit includes a two-pole induction motor 1, a working fluid pump variable frequency control switch 3, and a low-speed inverter 4. , working fluid pump 6, overrunning clutch 10, reduction box 12, condenser 13, turbine 14 and evaporator 15;

[0035] One end of the two-pole induction motor 1 is connected with one end of the reduction box 12 through the overrunning clutch 10, and the other end of the reduction box 12 is connected with the power input end of the turbine 14; a turbine speed sensor 11 is installed in the reduction box 12; the turbine speed sensor 11 is used to detect the rotational speed data of the turbine 14;

[0036] The evaporator 15 is connected to the inlet of the turbine 14 through a pipeline 31, and the outlet of the turbine 14 is connected to one end of the condenser 13 through ...

Embodiment 2

[0073] If the overrunning clutch 10 is changed to the SSS clutch, the turbine will not rotate during the starting process of the two-pole induction motor 1;

[0074] At this point the process is:

[0075] The power grid gradually starts the two-pole induction motor 1 to achieve the grid synchronous speed and no-load operation; reduce the starting current through the low-speed frequency converter 4;

[0076] The low-speed inverter 4 is cut off, and it is pulled in with the variable frequency control switch of the working fluid pump;

[0077] The opening of the turbine inlet electric regulating valve 5 should not exceed 30% to warm up the machine. The warm-up time is about 10 minutes. Then set the turbine inlet electric regulating valve 5 according to the speed-up curve to slowly increase the opening. The turbine starts to increase speed, exceeding the synchronous speed of the grid. After the SSS clutch is automatically engaged, it starts to output power and turns to grid-conne...

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Abstract

The invention discloses an ORC (organic Rankine cycle) system starting grid-connected system and method, and relates to the technical field of small and medium-sized waste heat power generation. The system is used for solving the problems of various system configurations, complex control and high operation and maintenance difficulty caused by the fact that a synchronous generator, a synchronous cabinet, a control cabinet, an electrical switch cabinet and an electro-hydraulic speed regulation system are adopted by an existing small and medium-sized waste heat generator set for grid-connected feeding. Comprising an organic Rankine cycle unit and a grid-connected switch cabinet, and the organic Rankine cycle unit is connected to a power grid through the grid-connected switch cabinet; according to the invention, the grid-connected switch cabinet is matched with the switching of the low-speed frequency converter to realize the automatic rapid grid connection of power generation, the fluctuation of a heat source is adapted through the motor switching-out of the low-speed frequency converter after the grid connection and the variable-frequency operation control of the working medium pump, and the rapid and stable start-up, grid connection and self-following stable operation are realized through the automatic control of the start-up process of the unit.

Description

technical field [0001] The invention relates to the technical field of medium and small waste heat power generation, in particular to an ORC system startup and grid connection system and method. Background technique [0002] In the field of industrial waste heat recovery, there are a large number of process materials, hot water, hydrothermal liquid and flue gas below 200 ℃ for refining, polyester, fertilizer, coal chemical, non-ferrous metal smelting and other industries. Conventionally, it is often necessary to use air coolers, Cooling towers, etc. can be used for cooling, and the organic Rankine cycle power generation system (ORC system) can be used to recover low-grade waste heat and generate electricity for use in the factory area or feeding the power grid, thereby reducing industrial energy consumption, especially for the current industrial peak electricity price. The rate has been raised. The country attaches great importance to the dual-carbon strategy, and under the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K11/02F01K13/02F01K27/00F01D15/10F01D17/10H02J3/40
CPCF01K11/02F01K13/02F01K27/00F01D15/10F01D17/10H02J3/40Y02P80/15
Inventor 陶加银张泽国赵湖滨段艺村
Owner 安徽润安思变能源技术有限公司
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