Thermal power plant heat storage power generation peak load and frequency regulation system and working method

A technology for peak regulation and frequency regulation, thermal power plant, applied in the field of thermal storage power generation peak regulation and frequency regulation system, can solve the problems of low load grid capacity, waste, generator set shutdown and other problems

Pending Publication Date: 2021-09-14
HEPU ENERGY ENVIRONMENTAL TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the requirements of power load, the current power generation installed capacity and grid capacity are built according to the maximum demand. As the peak-to-valley difference of the

Method used

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  • Thermal power plant heat storage power generation peak load and frequency regulation system and working method
  • Thermal power plant heat storage power generation peak load and frequency regulation system and working method
  • Thermal power plant heat storage power generation peak load and frequency regulation system and working method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as figure 1As shown, a heat storage power generation peak regulation and frequency regulation system in a thermal power plant includes a heat storage device 9 and a unit peak regulation and frequency regulation control unit 15 . The heat storage power generation peak regulation and frequency regulation system of the thermal power plant is set in the thermal power plant, and the thermal power plant includes a power plant boiler 1, a large steam turbine 2 and a generator 3. The utility boiler 1 in the thermal power plant burns pulverized coal to heat the water in the boiler to generate water vapor, which drives the large steam turbine 2 to generate kinetic energy, and the large steam turbine drives the rotor of the generator 3 to move and cut the magnetic field lines to generate electric energy. The steam releasing thermal potential energy is discharged from the exhaust port of the large steam turbine 2, sent to the condenser 4 for cooling, and condensed into water a...

Embodiment 2

[0051] Such as figure 2 As shown, the heat storage medium in the heat storage device in this embodiment is high-temperature molten salt, and the heat storage device also includes a molten salt cold tank 17 and a molten salt hot tank 18 .

[0052] When it is necessary to store heat for the heat storage medium in the heat storage device, the cold salt in the molten salt cold tank 17 is pumped into the peak-shaving and frequency-regulating electric heater 10 through the molten salt pump, and the peak-shaving and frequency-regulating electric heater 10 utilizes peak-shaving Frequency modulation electric heating, and the heated molten salt is pumped into the molten salt hot tank 18 through the hot salt pump; or the cold salt in the molten salt cold tank 17 is pumped into the high-temperature flue gas heat exchanger 13 through the molten salt pump, Use the high-temperature flue gas of the power plant boiler to heat the molten salt, and pump the heated molten salt to the molten salt...

Embodiment 3

[0056] Such as image 3 As shown, the heat storage medium in the heat storage device 9 in this embodiment is a solid heat storage brick, and the heat storage material of the solid heat storage brick includes concrete, solid magnesia brick, solid heat-resistant brick, solid heat-resistant sand, sand, soil any of the. Preferably, the solid heat storage bricks in this embodiment are solid heat storage magnesia bricks. Solid heat storage magnesia bricks 19 are arranged in the heat storage device 9, and the peak and frequency modulation electric heater 10 is driven by the peak and frequency modulation electric power to store heat in the solid magnesia bricks. The peak regulation and frequency regulation electric heater 10 in the heat storage device 9 is an electric heating plate or electric heating wire arranged in a solid heat storage brick, and the peak regulation and frequency regulation electric heater 10 is connected to the unit peak regulation and frequency regulation contro...

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PUM

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Abstract

The invention discloses a thermal power plant heat storage power generation peak load and frequency regulation system and a working method . The system comprises a heat storage device and a unit peak load and frequency regulation control unit. The heat storage device comprises a heat storage medium, a peak load and frequency regulation electric heater and a low-pressure heating overheating heat exchanger; the peak load and frequency regulation electric heater is used for heating the heat storage medium by utilizing peak load and frequency regulation surplus power of a thermal power generating unit; and superheated steam generated after the feed water or the condensed water is heated by the low-pressure heating overheating heat exchanger is fed into a thermal power generating unit reheater or a heat storage small steam turbine. The thermal power plant heat storage power generation peak load and frequency regulation system provided by the invention has the beneficial effects that in the electricity consumption trough period, the heat storage medium is heated through surplus high-temperature steam or high-temperature flue gas of the thermal power plant or electric power to achieve peak regulation, frequency modulation and heat storage, and the flexible peak regulation and frequency modulation auxiliary service of the thermal power plant is achieved.

Description

technical field [0001] The invention relates to the field of energy utilization, in particular to a thermal power plant-based heat storage power generation peak regulation and frequency regulation system and a working method. Background technique [0002] Energy storage power stations are an urgent need to improve the efficiency, safety and economy of conventional energy generation and transmission. In order to meet the requirements of power load, the current power generation installed capacity and grid capacity are built according to the maximum demand. As the peak-to-valley difference of the power grid increases day by day, it will inevitably lead to the shutdown of power generation units or low-load operation during off-peak power consumption and the reduction of grid capacity. waste. In 2011, the total load factor of conventional coal-fired generating units nationwide was only 51.8%, and the load utilization factor of the power grid was also less than 55%. The use of e...

Claims

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Application Information

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IPC IPC(8): F22B1/28F22B33/18F22G1/00F28D20/00F01K23/00F01K7/44F01K7/40F01K7/22F01D15/10
CPCF22B1/28F22B33/18F22G1/00F28D20/00F01K23/00F01K7/44F01K7/40F01K7/22F01D15/10Y02E60/14
Inventor 崔华杨豫森
Owner HEPU ENERGY ENVIRONMENTAL TECHNOLOGY CO LTD
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