Thermal power plant hot water heat storage and electrode boiler coupling peak regulation system and method

Abstract

The invention discloses a thermal power plant hot water heat storage and electrode boiler coupling peak regulation system and method. A # 1 electrode boiler is connected with the primary side of a # 1 plate heat exchanger, and a # 2 electrode boiler is connected with the primary side of a # 2 plate heat exchanger; the third electrode boiler is connected with the primary side of the third plate heat exchanger; an outlet of a cold water layer in the hot water storage tank is connected with a secondary side inlet of the first plate heat exchanger, a secondary side inlet of the second plate heat exchanger and a secondary side inlet of the third plate heat exchanger. An inlet of a hot water layer in the hot water storage tank is connected with a secondary side outlet of the first plate heat exchanger, a secondary side outlet of the second plate heat exchanger and a secondary side outlet of the third plate heat exchanger. An outlet of a hot water layer in the hot water storage tank is connected with an outlet of the heat supply initial station; and an inlet of a cold water layer in the hot water storage tank is connected with an inlet of the heat supply initial station. The system and method can improve the peak regulation capacity of a thermal power plant.

Description

Technical Field

[0001] The present invention belongs to the field of thermoelectric decoupling, energy storage and peak regulation of thermal power plants, and relates to a system and method for peak regulation of hot water heat storage and electrode boiler coupling in a thermal power plant. Background Art

[0002] The installed capacity of new energy sources such as wind power and photovoltaic power has doubled, and the consumption of new energy has become a prominent issue. Due to the optimization of energy consumption structure and the increase in the peak-to-valley difference of the power system, thermal power units are facing the need for deep peak regulation while taking on the task of heating. At present, due to the "heat-to-electricity" operation mode of thermal power units, the peak regulation capacity of thermal power plant units is greatly limited. Especially in the severe cold period in winter, thermal power units are often in a high-load operation state, which makes it difficult to decouple heat and electricity and the peak regulation capacity of the power grid is insufficient.

[0003] Therefore, in order to solve the problem of abandoned wind and photovoltaic resources and ensure winter heating needs, thermal power units use energy storage devices to store the excess electricity generated when the thermal power units are peak-shaving, convert it into thermal energy and directly incorporate it into the heating network. To a certain extent, it decouples the rigid constraint of "determining electricity by heat", realizes deep peak-shaving of the units, and obtains better peak-shaving compensation benefits. However, the peak-shaving capacity of thermal power plants needs to be further improved. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a system and method for peak regulation of hot water heat storage and electrode boiler coupling in a thermal power plant, which can improve the peak regulation capacity of the thermal power plant.

[0005] To achieve the above-mentioned purpose, the present invention discloses a system for coupling peak load regulation of hot water heat storage and electrode boiler in a thermal power plant, comprising a generator set, a power management module, a #1 electrode boiler, a #2 electrode boiler, a #3 electrode boiler, a heating first station, a heat user, a #1 plate heat exchanger, a #2 plate heat exchanger, a #3 plate heat exchanger and a hot water storage tank;

[0006] The output end of the generator set is connected to the power interface of the #1 electrode boiler, the power interface of the #2 electrode boiler, and the power interface of the #3 electrode boiler through the power management module; the output end of the generator set is connected to the power interface of the heating first station, the outlet of the heating first station is connected to the inlet of the heat user, and the outlet of the heat user is connected to the inlet of the heating first station;

[0007] The #1 electrode boiler is connected to the primary side of the #1 plate heat exchanger, and the #2 electrode boiler is connected to the primary side of the #2 plate heat exchanger; the #3 electrode boiler is connected to the primary side of the #3 plate heat exchanger; the outlet of the cold water layer in the hot water storage tank is connected to the secondary side inlet of the #1 plate heat exchanger, the secondary side inlet of the #2 plate heat exchanger, and the secondary side inlet of the #3 plate heat exchanger; the inlet of the hot water layer in the hot water storage tank is connected to the secondary side outlet of the #1 plate heat exchanger, the secondary side outlet of the #2 plate heat exchanger, and the secondary side outlet of the #3 plate heat exchanger; the outlet of the hot water layer in the hot water storage tank is connected to the outlet of the first heating station; the inlet of the cold water layer in the hot water storage tank is connected to the inlet of the first heating station.

[0008] Furthermore, the output end of the generator set is connected to the input end of the power management module via a step-up transformer and a step-down transformer.

[0009] Furthermore, the outlet of the #1 electrode boiler is connected to the primary side inlet of the #1 plate heat exchanger through the #1 motor boiler circulation pump and the #1 motor boiler electric regulating valve, and the primary side outlet of the #1 plate heat exchanger is connected to the inlet of the #1 electrode boiler.

[0010] Furthermore, the outlet of the #2 electrode boiler is connected to the inlet of the #2 electrode boiler via the #2 motor boiler circulation pump, the #2 motor boiler electric regulating valve and the primary side of the #2 plate heat exchanger in sequence.

[0011] Furthermore, the outlet of the #3 electrode boiler is connected to the inlet of the #3 electrode boiler via the #3 motor boiler circulation pump, the #3 motor boiler electric regulating valve and the primary side of the #3 plate heat exchanger in sequence.

[0012] Furthermore, the outlet of the cold water layer in the hot water storage tank is connected to the secondary side inlet of the #1 plate heat exchanger, the secondary side inlet of the #2 plate heat exchanger and the secondary side inlet of the #3 plate heat exchanger through the electric switching valve at the heat storage side outlet of the hot water storage tank.

[0013] Furthermore, the inlet of the hot water layer in the hot water storage tank is connected to the secondary side outlet of the #1 plate heat exchanger, the secondary side outlet of the #2 plate heat exchanger and the secondary side outlet of the #3 plate heat exchanger through the electric switching valve on the heat storage side of the hot water storage tank.

[0014] Furthermore, the outlet of the hot water layer in the hot water storage tank is connected to the outlet of the heating first station through the electric switch valve at the outlet of the heat release side of the hot water storage tank.

[0015] Furthermore, the inlet of the cold water layer in the hot water storage tank is connected to the inlet of the heating first station through the hot water storage tank pump and the electric switching valve at the inlet of the heat release side of the hot water storage tank.

[0016] The method for peak regulation of hot water heat storage and electrode boiler coupling in a thermal power plant according to the present invention comprises the following steps:

[0017] Energy storage is performed during periods of low electricity load in thermal power plants, including:

[0018] 11) The electric energy output by the generator set is supplied to the #1 electrode boiler, #2 electrode boiler and #3 electrode boiler through the power management module;

[0019] 12) Keep the electric switch valve at the outlet of the hot water storage tank and the electric switch valve at the inlet of the hot water storage tank closed;

[0020] 13) #1 electrode boiler, #2 electrode boiler and #3 electrode boiler heat the water to the required temperature, then open the electric switch valve at the outlet of the heat storage side of the hot water storage tank, and let the water heated by #1 electrode boiler, #2 electrode boiler and #3 electrode boiler enter #1 plate heat exchanger, #2 plate heat exchanger and #3 plate heat exchanger to exchange heat with the cold water from the cold water layer in the hot water storage tank;

[0021] 14) After the cold water from the cold water layer in the hot water storage tank is heated by the #1 plate heat exchanger, the #2 plate heat exchanger and the #3 plate heat exchanger, it returns to the hot water layer of the hot water storage tank through the electric switch valve at the inlet of the heat storage side of the hot water storage tank;

[0022] During the period of high thermal load in the thermal power plant, energy is released, including:

[0023] 21) Keep the electric switch valve at the inlet of the hot water storage tank and the electric switch valve at the outlet of the hot water storage tank closed;

[0024] 22) Open the electric switch valve at the outlet of the hot water storage tank on the heat release side and the electric switch valve at the inlet of the hot water storage tank on the heat release side;

[0025] 23) Turn on the hot water tank pump, and the return water from the heat network enters the cold water layer in the hot water tank through the electric switch valve at the heat release side of the hot water tank and the hot water tank pump;

[0026] 24) The hot water in the hot water layer of the hot water storage tank enters the water supply pipeline of the heating network through the electric switch valve at the outlet of the heat release side of the hot water storage tank.

[0027] The present invention has the following beneficial effects:

[0028] The system and method for peak load regulation of hot water heat storage and electrode boiler coupling in the thermal power plant described in the present invention are as follows: in the period of low power load in the thermal power plant, the excess electric energy is consumed by the #1 electrode boiler, the #2 electrode boiler and the #3 electrode boiler to heat the feed water, and the heat is stored in the hot water storage tank. When the thermal load of the thermal power plant is high, the hot water in the hot water storage tank is sent to the water supply pipeline of the heating network to achieve thermal and electric decoupling, so that the cogeneration unit has the ability to operate with deep peak load regulation flexibility, so as to improve the peak load regulation capacity of the thermal power plant. In addition, the electrode boiler has strong adaptability to the power grid system with unstable voltage, and the electrode boiler operates safely, stably and reliably, without steam heat exchange link, and does not require boiler blowdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 is a system diagram of the present invention;

[0031] Among them, 1 is a generator set, 2 is a step-up transformer, 3 is a step-down transformer, 4 is a power management module, 5 is a #1 electrode boiler, 501 is a #1 motor boiler circulation pump, 502 is a #1 motor boiler electric regulating valve, 6 is a #2 electrode boiler, 601 is a #2 motor boiler circulation pump, 602 is a #2 motor boiler electric regulating valve, 7 is a #3 electrode boiler, 701 is a #3 motor boiler circulation pump, 702 is a #3 motor boiler electric regulating valve, 8 is a #1 plate heat exchanger, 9 is a #2 plate heat exchanger, 10 is a #3 plate heat exchanger, 11 is a heating first station, 12 is a hot water storage tank, 13 is a hot water storage tank pump, 14 is a heat user, 15 is an electric switch valve at the inlet of the hot water storage tank heat storage side, 16 is an electric switch valve at the outlet of the hot water storage tank heat storage side, 17 is an electric switch valve at the outlet of the hot water storage tank heat release side, and 18 is an electric switch valve at the inlet of the hot water storage tank heat release side. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0034] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0035] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0036] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0037] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0040] refer to Figure 1 The system for coupling peak load regulation of hot water heat storage and electrode boiler in a thermal power plant of the present invention comprises a generator set 1, a step-up transformer 2, a step-down transformer 3, a power management module 4, a #1 electrode boiler 5, a #2 electrode boiler 6, a #3 electrode boiler 7, a heating first station 11, a heat user 14, a #1 motor boiler circulation pump 501, a #1 motor boiler electric regulating valve 502, a #2 motor boiler circulation pump 601, a #2 motor boiler electric regulating valve 602, a #3 motor boiler circulation pump 701, a #3 motor boiler electric regulating valve 702, a #1 plate heat exchanger 8, a #2 plate heat exchanger 9, a #3 plate heat exchanger 10, a hot water storage tank 12, a hot water storage tank pump 13, a hot water storage tank heat storage side inlet electric switch valve 15, a hot water storage tank heat storage side outlet electric switch valve 16, a hot water storage tank heat release side outlet electric switch valve 17 and a hot water storage tank heat release side inlet electric switch valve 18;

[0041] The output end of the generator set 1 is connected to the input end of the step-up transformer 2, the output end of the step-up transformer 2 is connected to the input end of the step-down transformer 3, the output end of the step-down transformer 3 is connected to the input end of the power management module 4, and the output end of the power management module 4 is connected to the power interface of the #1 electrode boiler 5, the power interface of the #2 electrode boiler 6 and the power interface of the #3 electrode boiler 7.

[0042] The output end of the generator set 1 is connected to the power interface of the heating first station 11 , the outlet of the heating first station 11 is connected to the inlet of the heat user 14 , and the outlet of the heat user 14 is connected to the inlet of the heating first station 11 .

[0043] The power supply used by the power management module 4 is the power that cannot be connected to the grid during the peak load regulation of the thermal power unit, and the number of electrode boilers to be turned on is determined according to the peak load regulation.

[0044] The outlet of #1 electrode boiler 5 is connected to the primary side inlet of #1 plate heat exchanger 8 through #1 motor boiler circulation pump 501 and #1 motor boiler electric regulating valve 502, and the primary side outlet of #1 plate heat exchanger 8 is connected to the inlet of #1 electrode boiler 5; the outlet of #2 electrode boiler 6 is connected to the inlet of #2 electrode boiler 6 through #2 motor boiler circulation pump 601, #2 motor boiler electric regulating valve 602 and the primary side of #2 plate heat exchanger 9 in sequence; the outlet of #3 electrode boiler 7 is connected to the inlet of #3 electrode boiler 7 through #3 motor boiler circulation pump 701, #3 motor boiler electric regulating valve 702 and the primary side of #3 plate heat exchanger 10 in sequence.

[0045] The outlet of the cold water layer in the hot water storage tank 12 is connected to the secondary side inlet of the #1 plate heat exchanger 8, the secondary side inlet of the #2 plate heat exchanger 9 and the secondary side inlet of the #3 plate heat exchanger 10 through the hot water storage tank heat storage side outlet electric switching valve 16; the inlet of the hot water layer in the hot water storage tank 12 is connected to the secondary side outlet of the #1 plate heat exchanger 8, the secondary side outlet of the #2 plate heat exchanger 9 and the secondary side outlet of the #3 plate heat exchanger 10 through the hot water storage tank heat storage side inlet electric switching valve 15.

[0046] The outlet of the hot water layer in the hot water storage tank 12 is connected to the outlet of the heating first station 11 through the hot water storage tank heat release side outlet electric switching valve 17; the inlet of the cold water layer in the hot water storage tank 12 is connected to the inlet of the heating first station 11 through the hot water storage tank pump 13 and the hot water storage tank heat release side inlet electric switching valve 18.

[0047] The flow directions of the hot water and cold water media in the #1 plate heat exchanger 8, the #2 plate heat exchanger 9 and the #3 plate heat exchanger 10 are opposite.

[0048] The hot water storage tank 12 is a normal pressure tank, the water supply volume and the return water volume of the hot water storage tank 12 are consistent, and the circulating water flow rate of the heat network remains unchanged.

[0049] Accordingly, the method for peak regulation of hot water heat storage and electrode boiler coupling in a thermal power plant according to the present invention comprises the following steps:

[0050] During the period of low electricity load in the thermal power plant, energy storage is carried out, specifically:

[0051] 11) The power managed by the power management module 4 is the power generated by the generator set 1 minus the power connected to the grid;

[0052] 12) The power supply of #1 electrode boiler 5, #2 electrode boiler 6 and #3 electrode boiler 7 is taken from the power management module 4;

[0053] 13) Keep the electric switch valve 17 at the outlet of the hot water storage tank on the heat release side and the electric switch valve 18 at the inlet of the hot water storage tank on the heat release side closed;

[0054] 14) #1 electrode boiler 5, #2 electrode boiler 6 and #3 electrode boiler 7 heat the water to the required temperature, then open the electric switch valve 16 at the outlet of the heat storage side of the hot water storage tank, and let the water heated by #1 electrode boiler 5, #2 electrode boiler 6 and #3 electrode boiler 7 enter #1 plate heat exchanger 8, #2 plate heat exchanger 9 and #3 plate heat exchanger 10 to exchange heat with the cold water from the cold water layer in the hot water storage tank 12;

[0055] 15) After the cold water from the cold water layer in the hot water storage tank 12 is heated by the #1 plate heat exchanger 8, the #2 plate heat exchanger 9 and the #3 plate heat exchanger 10, it returns to the hot water layer of the hot water storage tank 12 through the electric switch valve 15 at the heat storage side inlet of the hot water storage tank;

[0056] During the period of high heat load in the thermal power plant, energy is released, specifically:

[0057] 21) Keep the electric switch valve 15 at the inlet of the hot water storage tank heat storage side and the electric switch valve 16 at the outlet of the hot water storage tank heat storage side closed;

[0058] 22) Open the electric switch valve 17 at the outlet of the hot water storage tank on the heat release side and the electric switch valve 18 at the inlet of the hot water storage tank on the heat release side;

[0059] 23) Turn on the hot water tank pump 13, and the return water from the heating network enters the cold water layer in the hot water tank 12 through the electric switch valve 18 at the heat release side inlet of the hot water tank and the hot water tank pump 13;

[0060] 24) The hot water in the hot water layer of the hot water storage tank 12 enters the water supply pipeline of the heating network through the electric switch valve 17 at the outlet of the hot water storage tank on the heat release side.

[0061] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0062] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0063] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A system for coupling hot water heat storage and electrode boiler peak load regulation in a thermal power plant. It is characterized in that It includes a generator set (1), a power management module (4), a #1 electrode boiler (5), a #2 electrode boiler (6), a #3 electrode boiler (7), a heating source station (11), a heat user (14), a #1 plate heat exchanger (8), a #2 plate heat exchanger (9), a #3 plate heat exchanger (10) and a hot water storage tank (12); The output end of the generator set (1) is connected to the power interface of the #1 electrode boiler (5), the power interface of the #2 electrode boiler (6) and the power interface of the #3 electrode boiler (7) via the power management module (4); the output end of the generator set (1) is connected to the power interface of the heating first station (11), the outlet of the heating first station (11) is connected to the inlet of the heat user (14), and the outlet of the heat user (14) is connected to the inlet of the heating first station (11); The #1 electrode boiler (5) is connected to the primary side of the #1 plate heat exchanger (8), and the #2 electrode boiler (6) is connected to the primary side of the #2 plate heat exchanger (9); the #3 electrode boiler (7) is connected to the primary side of the #3 plate heat exchanger (10); the outlet of the cold water layer in the hot water storage tank (12) is connected to the secondary side inlet of the #1 plate heat exchanger (8), the secondary side inlet of the #2 plate heat exchanger (9), and the secondary side inlet of the #3 plate heat exchanger (10); the inlet of the hot water layer in the hot water storage tank (12) is connected to the secondary side outlet of the #1 plate heat exchanger (8), the secondary side outlet of the #2 plate heat exchanger (9), and the secondary side outlet of the #3 plate heat exchanger (10); the outlet of the hot water layer in the hot water storage tank (12) is connected to the outlet of the heating primary station (11); and the inlet of the cold water layer in the hot water storage tank (12) is connected to the inlet of the heating primary station (11).

2. The system for coupling peak load regulation of hot water heat storage and electrode boiler in thermal power plant according to claim 1, It is characterized in that The output end of the generator set (1) is connected to the input end of the power management module (4) via a step-up transformer (2) and a step-down transformer (3).

3. The system for coupling peak load regulation of hot water heat storage and electrode boiler in thermal power plant according to claim 1, It is characterized in that The outlet of the #1 electrode boiler (5) is connected to the primary side inlet of the #1 plate heat exchanger (8) through the #1 motor boiler circulation pump (501) and the #1 motor boiler electric regulating valve (502), and the primary side outlet of the #1 plate heat exchanger (8) is connected to the inlet of the #1 electrode boiler (5).

4. The system for coupling peak load regulation of hot water heat storage and electrode boiler in thermal power plant according to claim 1, It is characterized in that The outlet of the #2 electrode boiler (6) is connected to the inlet of the #2 electrode boiler (6) via the #2 motor boiler circulation pump (601), the #2 motor boiler electric regulating valve (602) and the primary side of the #2 plate heat exchanger (9) in sequence.

5. The system for coupling peak load regulation of hot water heat storage and electrode boiler in thermal power plant according to claim 1, It is characterized in that The outlet of the #3 electrode boiler (7) is connected to the inlet of the #3 electrode boiler (7) via the #3 motor boiler circulation pump (701), the #3 motor boiler electric regulating valve (702) and the primary side of the #3 plate heat exchanger (10) in sequence.

6. The system for coupling peak load regulation of hot water heat storage and electrode boiler in thermal power plant according to claim 1, It is characterized in that The outlet of the cold water layer in the hot water storage tank (12) is connected to the secondary side inlet of the #1 plate heat exchanger (8), the secondary side inlet of the #2 plate heat exchanger (9) and the secondary side inlet of the #3 plate heat exchanger (10) via the hot water storage tank heat storage side outlet electric switch valve (16).

7. The system for coupling peak load regulation of hot water heat storage and electrode boiler in thermal power plant according to claim 1, It is characterized in that The inlet of the hot water layer in the hot water storage tank (12) is connected to the secondary side outlet of the #1 plate heat exchanger (8), the secondary side outlet of the #2 plate heat exchanger (9) and the secondary side outlet of the #3 plate heat exchanger (10) via the hot water storage tank heat storage side inlet electric switch valve (15).

8. The system for coupling peak load regulation of hot water heat storage and electrode boiler in thermal power plant according to claim 1, It is characterized in that The outlet of the hot water layer in the hot water storage tank (12) is connected to the outlet of the heating primary station (11) via the electric switch valve (17) at the outlet of the hot water storage tank heat release side.

9. The system for coupling peak load regulation of hot water heat storage and electrode boiler in thermal power plant according to claim 1, It is characterized in that The inlet of the cold water layer in the hot water storage tank (12) is connected to the inlet of the heating head station (11) through the hot water storage tank pump (13) and the hot water storage tank heat release side inlet electric switch valve (18).

10. A method for peak regulation of hot water heat storage and electrode boiler coupling in thermal power plants, It is characterized in that The steps include: Energy storage is performed during periods of low electricity load in thermal power plants, including: 11) The electric energy output by the generator set (1) is supplied to the #1 electrode boiler (5), the #2 electrode boiler (6) and the #3 electrode boiler (7) via the power management module (4); 12) Keep the electric switch valve (17) at the outlet of the hot water storage tank on the heat release side and the electric switch valve (18) at the inlet of the hot water storage tank on the heat release side closed; 13) The #1 electrode boiler (5), the #2 electrode boiler (6) and the #3 electrode boiler (7) heat the water to the required temperature, and then open the electric switch valve (16) at the outlet of the heat storage side of the hot water storage tank, so that the water heated by the #1 electrode boiler (5), the #2 electrode boiler (6) and the #3 electrode boiler (7) enters the #1 plate heat exchanger (8), the #2 plate heat exchanger (9) and the #3 plate heat exchanger (10) to exchange heat with the cold water from the cold water layer in the hot water storage tank (12); 14) After the cold water from the cold water layer in the hot water storage tank (12) is heated by the #1 plate heat exchanger (8), the #2 plate heat exchanger (9) and the #3 plate heat exchanger (10), it returns to the hot water layer in the hot water storage tank (12) through the electric switch valve (15) at the heat storage side inlet of the hot water storage tank; During the period of high thermal load in the thermal power plant, energy is released, including: 21) Keep the electric switch valve (15) at the inlet of the hot water storage tank heat storage side and the electric switch valve (16) at the outlet of the hot water storage tank heat storage side closed; 22) Open the electric switch valve (17) at the outlet of the hot water storage tank on the heat release side and the electric switch valve (18) at the inlet of the hot water storage tank on the heat release side; 23) Turn on the hot water tank pump (13), and the return water from the heating network enters the cold water layer in the hot water tank (12) through the electric switch valve (18) at the heat release side inlet of the hot water tank and the hot water tank pump (13); 24) The hot water in the hot water layer of the hot water storage tank (12) enters the water supply pipeline of the heating network through the electric switch valve (17) at the outlet of the hot water storage tank on the heat release side.

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