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Thermal power generating unit coordinated control peak and frequency modulation system and method

A technology of coordinated control and thermal power units, applied in the direction of reducing/preventing power oscillation, AC network load balancing, single-network parallel feeding arrangement, etc., can solve problems such as high requirements for operators, frequent actions of units, and limited depth of peak regulation. Achieve the effect of maximizing, stabilizing revenue from peak regulation and frequency regulation, and improving service life

Pending Publication Date: 2020-07-31
HEPU ENERGY ENVIRONMENTAL TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, based on the transformation measures of the unit itself, there are common problems such as frequent unit actions, low frequency modulation quality, limited peak shaving depth, affecting the life of boilers and turbines, and high requirements for operating personnel.

Method used

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  • Thermal power generating unit coordinated control peak and frequency modulation system and method
  • Thermal power generating unit coordinated control peak and frequency modulation system and method
  • Thermal power generating unit coordinated control peak and frequency modulation system and method

Examples

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Effect test

Embodiment 1

[0052] A thermal power unit coordinated control peak regulation and frequency regulation system, such as Figure 1-2 As shown, it includes a unit coordination control module 1 and an electric energy storage device 2; the unit coordination control module 1 includes a boiler coordination control module 11, a steam turbine coordination control module 12 and an electric energy storage control module 13; the unit coordination control module 1 It is integrated in the control cabinet of the centralized control room of the thermal power unit, communicates with the CCS and AGC control systems, and communicates with the electric energy storage equipment 2 and the operating parameter sensors and controllers in the boiler 100, steam turbine 101, and generator 102 of the thermal power unit ;

[0053] When the CCS and AGC control system receives an instruction to increase or decrease the on-grid electricity load issued by the grid dispatching center, it realizes the control of the thermal p...

Embodiment 2

[0075] This embodiment also provides an optimal control method for a thermal power unit coordinated control peak regulation and frequency regulation system, the optimal control method adopts any one of nonlinear model control, predictive control, neural network control, adaptive control, fuzzy control, or combination to realize deep peak regulation and high Kp value frequency regulation of thermal power units; the specific process is as follows:

[0076] Such as image 3 As shown, the unit coordination control module collects relevant parameter data from CCS and AGC control systems and various operating parameter sensors installed in boilers, turbines, generators and electric energy storage equipment; the parameter data includes grid frequency, AGC Instructions, load instructions for peak shaving and frequency modulation, actual power of thermal power units, coal feed volume for each layer of boiler burners, feed water flow, water spray flow at all levels, main reheat steam fl...

Embodiment 3

[0084] In this embodiment, a load adjustment method using the above-mentioned thermal power unit to coordinately control the peak-shaving and frequency-regulating system, the specific process is as follows:

[0085] The power grid dispatching center issues the load demand data for the power plant, and the CCS and AGC control systems compare the real-time power generation with the grid demand load;

[0086] If it is determined that the power generation load needs to be reduced in the next step, such as Figure 4 Shown:

[0087] If the thermal power unit does not need to reduce the power generation load, the thermal power unit maintains the current load; if the thermal power unit needs to reduce the power generation load, the electric energy storage device control module uses the power transmission and power control unit to adjust the thermal power unit to supply the electric energy storage device. Charging power, using the electric energy storage power control unit to adjust t...

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Abstract

The invention discloses a thermal power generating unit coordinated control peak regulation and frequency modulation system and method. The system comprises a unit coordination control module and an electric energy storage module, the unit coordination control module comprises a boiler coordination control module, a steam turbine coordination control module and an electric energy storage control module. The unit coordination control module is integrated in a thermal power unit central control room control cabinet and is in communication connection with an original CCS and AGC control system ofa thermal power unit, a boiler, a steam turbine, a generator, various operating parameter sensors for electric energy storage and a controller. According to the invention, the unit coordination control module is combined with the electric energy storage module, so that peak-load and frequency-modulation operation of the unit in an AGC commissioning state from 15% to 100% can be realized, the service life of the electric energy storage equipment is prolonged, the average investment of the system is reduced, and the system can be widely applied and implemented in the thermal power industry.

Description

technical field [0001] The invention relates to the technical field of thermal power generation, in particular to a system and method for coordinated control of thermal power units for peak regulation and frequency regulation. Background technique [0002] In recent years, with the continuous upgrading of the country's emphasis on wind power, photovoltaic and other green energy, and the increase of new energy access, in order to stabilize the operation of the power grid, it has become a new normal to increase the deep peak regulation and frequency regulation capabilities of thermal power plants. In order to actively respond to the requirements of the power grid, on the premise of ensuring the safe operation of the unit, it is necessary to continuously expand the peak shaving depth and frequency regulation capability, reduce peak shaving fuel consumption, increase the automatic input rate during deep peak shaving, and minimize the labor intensity of operators . [0003] At p...

Claims

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Application Information

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IPC IPC(8): H02J3/46H02J3/28H02J3/24
CPCH02J3/24H02J3/28H02J3/46
Inventor 崔华杨豫森王小英
Owner HEPU ENERGY ENVIRONMENTAL TECHNOLOGY CO LTD
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