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Dynamic frequency modulation regulation and control method and system based on combined heat and power generation

A control system, cogeneration technology

Active Publication Date: 2022-03-04
SHENHUA SHENDONG POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, the actual speed signal of the steam turbine used on the DEH side is used as the frequency modulation control signal, and its accuracy cannot meet the requirements. In addition, there is a deviation from the actual frequency of the power grid. When small fluctuations occur, it is difficult to reflect the real fluctuation of the grid frequency, which will largely cause malfunction or refusal to operate, which will affect the response speed and adjustment effect of frequency modulation control
[0004] The frequency modulation of the cogeneration unit needs to collect the frequency signal of the unit in real time and participate in the control. If the accuracy of the frequency signal of the unit is not good or the signals are different from the same source, the frequency modulation control may not be achieved Indicator requirements

Method used

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  • Dynamic frequency modulation regulation and control method and system based on combined heat and power generation

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Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the dynamic regulation and control system based on cogeneration of heat and power in this application includes: DCS (distributed control) module 101, DEH (auxiliary control) module 102, PMU (power management) module 103, and homologous control module 104.

[0038] DCS module 101 is connected with homologous control module 104 and RTU module 105; DEH module 102 is connected with homologous control module 104; PMU module 103 is connected with homologous control module 104; Homologous control module 104 is connected with PMU module 103 and DCS module 101.

[0039] Described system also comprises: RTU module (remote terminal) 105 and scheduling module 106, and DEH module 102 is connected with RTU module 105; RTU module 105 is connected with DCS module 101, homologous control module 104 and scheduling module 106; Scheduling module 106 is connected with The RTU module 105 is connected.

[0040] The PMU module 103 is used to send voltage and current...

Embodiment 2

[0055] Embodiment 2 of the present invention provides a dynamic control system based on cogeneration frequency modulation, including a DCS module 101, a DEH module 102, a PMU module 103, a homologous control module 104, and also includes: an RTU module 105 and a scheduling module 106.

[0056] In this embodiment, the DCS module 101 may include a data acquisition system DAS, an analog control system MCS, a sequential control system SCS, a boiler furnace safety control system FSSS, a digital electro-hydraulic control system DEH, a boiler soot blowing program control system, and a circulation pump room control system, etc. It also includes: a PMU module 103, and a homologous control module 104 located at the power plant end.

[0057] For example, one of the means and methods of frequency modulation detection in the power dispatching center is to install the synchrophasor measurement device PMU in the power plant, and realize the detection and analysis of the dynamic process of th...

Embodiment 3

[0077] Embodiment 2 of the present invention provides a dynamic control method for frequency modulation based on cogeneration, including the following steps:

[0078] Step 201:

[0079] Obtain the traditional steam turbine speed signal group and the generator main transformer high-voltage side frequency signal group collected by the high-precision intelligent transmitter device group, in which the generator main transformer high-voltage side frequency signal group includes DEH side frequency modulation narrow frequency signal group, DEH side frequency modulation wide frequency signal group Signal group, CCS side FM narrow frequency signal group and CCS side FM broadband signal group.

[0080] Select the optimal signal from the traditional steam turbine speed signal group and the DEH side frequency modulation narrow frequency signal group, convert it into a speed signal, and obtain the frequency correction value of the DEH side frequency modulation through the speed signal and ...

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Abstract

The invention discloses a dynamic regulation and control method and system for frequency modulation based on combined heat and power generation. The dynamic regulation and control system comprises a DCS system, a DEH system, a PMU system, a homologous control device, an RTU system and a scheduling system. The DCS is connected with the homologous control device and the RTU system; the DEH system is connected with the homologous control device; the PMU system is connected with the homologous control device; the homologous control device is connected with the PMU system, the DCS system, the DEH system and the RTU system; the RTU system is connected with the DCS system, the homologous control device and the scheduling system; and the scheduling system is connected with the RTU system.

Description

technical field [0001] The invention relates to the field of power grid frequency regulation, in particular to a dynamic control method and system for frequency regulation based on cogeneration of heat and power. Background technique [0002] In order to ensure the safe and stable operation of the power grid, an important means is frequency regulation, which means that when the frequency of the power grid exceeds the specified normal range, the change of the frequency of the power grid will make the speed control system of each unit participating in frequency regulation in the power grid automatically according to the change of the frequency of the power grid. Increase or decrease the power of the unit in a timely manner, so as to achieve a new balance, and limit the change of the grid frequency within a certain range. [0003] At present, the actual speed signal of the steam turbine used on the DEH side is used as the frequency modulation control signal, and its accuracy ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/48
CPCH02J3/48
Inventor 王爱朱叶卫李文军董岩峰韩立军张建宏赵治忠刘乐瓦其尔胡青瞾石强强董欣
Owner SHENHUA SHENDONG POWER