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Grid frequency modulation system based on electrode boiler

A technology for electrode boilers and power grids, applied to AC networks with the same frequency from different sources, etc., can solve problems such as frequency fluctuation and system collapse, and achieve the effects of increasing the response rate, prolonging the life of the unit, and increasing the safety.

Active Publication Date: 2017-11-21
HEPU ENERGY ENVIRONMENTAL TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that in sudden accidents and large load (power) disturbances, although many units have the ability to adjust the load, the frequency modulation response to the frequency deviation is almost zero, and at this time there will be large frequency fluctuations or even system failure crash accident

Method used

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  • Grid frequency modulation system based on electrode boiler
  • Grid frequency modulation system based on electrode boiler
  • Grid frequency modulation system based on electrode boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] like figure 2 As shown, a power grid frequency regulation system based on electrode boilers, including:

[0052] A frequency modulation control module, including a power grid power dispatching center and a centralized power plant control system, which is connected to the power supply control module and the power control cabinet 6 to control both;

[0053] The power supply control module, whose input end is connected to the output of the power plant, and whose output end is connected to the power control cabinet 6 of the electrode boiler 5, is used to convert the electric energy output by the power plant and then send it to the power control cabinet 6;

[0054] The power control cabinet 6 is used to directly transmit the received voltage, or transmit it to the electrode boiler after being transformed and control the power of the electrode boiler;

[0055] Electrode boilers for converting incoming electrical energy into heat.

[0056] In this embodiment, the power supp...

Embodiment 2

[0083] like image 3 As shown, this embodiment is basically the same mechanism as that of the electrode boiler participating in the frequency modulation system described in Embodiment 1, the difference is that the power supply of the electrode boiler is connected at 220kV ~ 500kV after the step-up station of the unit, and then the voltage is reduced through the voltage reducer To 380V ~ 110kV to power the electrode boiler.

Embodiment 3

[0085] like Figure 4 As shown, this embodiment is basically the same as the mechanism of the electrode boiler participating in the frequency modulation system described in Embodiment 1. The difference is that the power supply of the electrode boiler is connected on the utility line. If the voltage of the utility line is the same as the electrode boiler power supply If the voltage is required to be the same, it can be connected directly through the electrical switch. If the voltage is different, it can be adjusted to 380V ~ 110kV through the transformer to supply power to the electrode boiler.

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Abstract

The invention provides a system of grid frequency modulation involving the participation of an electrode boiler. The system includes a grid and power plant frequency modulation control module, an electrode boiler power control cabinet, and an electrode boiler and heat output module. An electrode boiler responding quickly to power adjustment is linked with a unit. By quickly increasing or decreasing the load power of the electrode boiler, the electricity of the unit to access the grid can respond to the load quickly. Therefore, the increase in operation difficulty and the reduction in service life of the unit caused by the frequency modulation measures of the unit itself, such as adjusting the opening degree of the steam turbine governing valve, quickly changing the speed of the steam turbine, and carrying out high- / low-pressure heater switching, due to frequency modulation AGC adjustment and DEH adjustment, are avoided. Hot water or steam in the electrode boiler can be used for external heating in winter. For a pure condensing unit or a summer combined heat and power generation unit, hot water or steam in the electrode boiler can be supplied to a corresponding power plant thermodynamic system according to the temperature and pressure. Thus, a generator unit can be linked using the electrode boiler through all four seasons, and the unit can quickly respond to the grid frequency modulation requirement.

Description

technical field [0001] The invention relates to the field of power grid frequency regulation, in particular to a thermal power generating set using an electrode boiler to participate in power grid frequency regulation auxiliary services. Background technique [0002] In recent years, with the rapid development of China's national economy, people's demand for electricity has also increased sharply, and the peak-to-valley difference has increased day by day. The peak-to-valley ratio of China's power supply is about 10 / 0.7, which is much higher than the average level of 1 / 0.63 in developing countries and much higher than the peak-to-valley ratio of 1 / 0.25 in the United States. Therefore, the peak shaving task of China's power generation units is arduous. The frequency regulation capability of the generating set is the first important barrier to maintain the power balance and safety and stability of the power grid. Its regulation capability and performance are particularly impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/06
CPCH02J3/06
Inventor 崔华杨豫森谭智陈辉展望陈超朱明志
Owner HEPU ENERGY ENVIRONMENTAL TECHNOLOGY CO LTD
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