CN210152740U - Coal-fired unit electric wire netting frequency modulation peak shaver coupling device - Google Patents
Coal-fired unit electric wire netting frequency modulation peak shaver coupling device Download PDFInfo
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- CN210152740U CN210152740U CN201920913724.3U CN201920913724U CN210152740U CN 210152740 U CN210152740 U CN 210152740U CN 201920913724 U CN201920913724 U CN 201920913724U CN 210152740 U CN210152740 U CN 210152740U
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Abstract
The utility model discloses a coal-fired unit power grid frequency modulation peak regulation coupling device, which comprises an electrode boiler and a hot water storage tank, wherein a hot water outlet of the electrode boiler is connected with a water inlet of the hot water storage tank through a control valve, and a cold water inlet of the electrode boiler is connected with a water outlet of the hot water storage tank through a circulating hot water pump and the control valve; the other water inlet of the hot water storage tank is connected with a water replenishing water tank through a control valve and a water replenishing pump, and the other water outlet of the hot water storage tank is connected with a turbine heat regenerative system through the control valve and a hot water delivery pump; the electrode boiler is sequentially connected with a high-voltage station transformer, a high-voltage switch cabinet and a generator outlet bus through high-voltage cables, and each pump and each valve are respectively connected with a control unit; when the frequency modulation peak regulation of the power grid is carried out, the electrode boiler is quickly started, and the electric power at the outlet of the generator is consumed to heat the water in the hot water storage tank, so that the frequency modulation peak regulation of the power grid is realized; the peak regulation amplitude of the power grid is carried out by adjusting the power of the electrode boiler, the peak regulation time of the power grid is long, and the peak regulation is realized by adjusting the water quantity and the water temperature in the hot water storage tank.
Description
Technical Field
The utility model relates to a coal-fired unit electric wire netting frequency modulation peak shaving coupling device belongs to electric power flexibility and energy saving and consumption reduction technical field, is applicable to the coal-fired heat supply unit electric wire netting frequency modulation peak shaving of coal-fired pure condensing unit and non-heating period, ensures unit safe and reliable operation, improves the flexibility and the whole economic nature that the unit participated in electric wire netting frequency modulation peak shaving.
Background
At present, the peak regulation of a power grid is difficult, firstly, the power balance of the power grid at the valley is difficult, the dispatching pressure is huge, and the safe operation risk of the power grid is increased; secondly, the power grid has serious insufficient capability of absorbing new energy such as wind power, photoelectricity and the like, and is not beneficial to regional energy conservation and emission reduction and energy structure transformation and upgrading; for the heat supply unit, through technical transformation, thermoelectric decoupling can be carried out to participate in the deep peak regulation of the power grid in a heat supply period, and the capacity of participating in the deep peak regulation of the power grid is absent in a non-heating period; in particular, although the coal-fired straight condensing unit has certain peak regulation capacity, the coal-fired straight condensing unit lacks deep peak regulation capacity and has no fast, safe and economic frequency modulation technology and method. How to ensure that a coal-fired straight condensing unit and a coal-fired heat supply unit in a non-heating period safely, quickly, efficiently and economically participate in deep frequency modulation and peak shaving of a power grid is a main problem at present.
In order to ensure that a coal-fired straight condensing unit and a coal-fired heat supply unit in a non-heating period participate in deep frequency modulation and peak shaving of a power grid, a novel device participating in deep frequency modulation and peak shaving of the power grid needs to be developed, the frequency modulation of the power grid is responded quickly, deep peak shaving is realized by coordinating with the unit, safe and reliable operation of the unit is ensured, double compensation of electric power auxiliary services of frequency modulation and peak shaving is fully enjoyed, the flexibility and the overall economy of the unit participating in frequency modulation and peak shaving of the power grid are greatly improved, and safe, environment-friendly and economic operation of the.
Disclosure of Invention
The utility model provides a coal-fired unit electric wire netting frequency modulation peak regulation coupling device, the device have solved coal-fired pure unit and non-heating period coal-fired heat supply unit and have participated in electric wire netting degree of depth frequency modulation peak regulation problem, realize unit safety, environmental protection, economic operation.
The utility model discloses a following technical scheme can realize:
a coal-fired unit power grid frequency modulation peak regulation coupling device comprises an electrode boiler and a hot water storage tank, wherein a hot water outlet of the electrode boiler is connected with a water inlet of the hot water storage tank through a control valve, and a cold water inlet of the electrode boiler is connected with a water outlet of the hot water storage tank through a circulating hot water pump and the control valve; the other water inlet of the hot water storage tank is connected with a water replenishing water tank through a control valve and a water replenishing pump, and the other water outlet of the hot water storage tank is connected with a turbine heat regenerative system through the control valve and a hot water delivery pump; the electrode boiler is sequentially connected with a high-voltage station transformer, a high-voltage switch cabinet and a generator outlet bus through high-voltage cables, and each pump and each valve are respectively connected with a control unit;
when the frequency of the power grid is modulated, the electrode boiler is quickly started, and the electric power at the outlet of the generator is consumed to heat the water in the hot water storage tank, so that the frequency modulation of the power grid is realized;
when the peak load of the power grid is regulated, the power of the electrode boiler is regulated to regulate the peak load, and the peak load regulation time of the power grid is realized by regulating the water quantity and the water temperature in the hot water storage tank; and after the peak regulation is finished, supplementing hot water in the hot water storage tank to a turbine regenerative system for utilization.
Preferably, the steam turbine heat recovery system supplements hot water sent by the hot water storage tank to a No. 5 low feeding port of the heat recovery system, so that the heat recovery system is better matched with the efficient energy utilization of the system.
Preferably, the control valves are all solenoid valves.
Preferably, the water replenishing tank is a chemical desalting tank.
Preferably, the coal-fired unit is a coal-fired straight condensing unit and a coal-fired heat supply unit in a non-heating period.
Preferably, the hot water storage tank is an atmospheric storage tank.
Preferably, the upper limit of the heating temperature of the hot water in the hot water storage tank is set to 90 ℃.
Preferably, the capacity of the hot water storage tank is set according to the peak shaving depth and the peak shaving time of the power grid where the unit is located.
Preferably, the hot water storage tank 6 is composed of a hot water pipe and a circulating hot water pump, a valve and an electrode boiler.
Preferably, after the standby unit exits from the power grid deep peak shaving state, hot water in the hot water storage tank is supplemented to the turbine regenerative system through the hot water delivery pump to recover heat.
The utility model has the advantages that:
1. the utility model discloses electrode boiler is adopted in the design among the device to electrode boiler power is taken from this factory generator export generating line, directly can adjust the online electric load of unit, provides real-time degree of depth frequency modulation service for the electric wire netting, and the key is electrode boiler's the speed of stopping of throwing can be according to power scheduling's instruction completely, and the unit is adjusted smoothly steadily and is exerted oneself.
2. The utility model discloses the capacity power that electrode boiler was adopted in the design is according to the requirement of unit place electric wire netting peak regulation scope and confirms in the device, effectively improves the security performance in the unit adjustment process, realizes safe and reliable, the economic steady operation of unit.
3. The utility model adopts the electrode boiler to heat the water in the hot water storage tank, and absorbs the excess heat in the thermodynamic system when the unit participates in peak shaving; the range of the heat which is absorbed by the unit and is discharged in excess is determined by the depth and time of the unit participating in peak shaving of the power grid, so that the amount of water in the hot water storage tank can be adjusted by the demineralized water replenishing pump, and the device is flexible and convenient.
4. The utility model discloses the hot water temperature upper limit in the device hot water storage tank sets up to 90 ℃, after the standby group withdrawed from the electric wire netting degree of depth peak regulation state, hot water in the hot water storage tank can supply to the steam turbine backheat system in, just in time with the low condensation temperature phase-match that adds the mouth No. 5, and the heat of recycling has been improved to high efficiency, has moved the whole economic nature of unit.
4. The hot water storage tank in the device adopts an atmospheric storage tank, wherein the upper limit of the water temperature of the heat exchange medium is set to 90 ℃, and the temperature is normal pressure and low temperature; meanwhile, the capacity power of the electrode boiler is determined according to the peak regulation range requirement of the power grid where the unit is located, so that the power grid environment is fully considered according to local conditions, and the electrode boiler is low in investment, high in safety and high in cost performance compared with other technologies.
5. The utility model discloses the device adopts the water in the electrode boiler heating hot water storage tank, still can regard as the reserve or supplementary heat source of heat supply unit heating in winter.
Drawings
Fig. 1 is a schematic view of the flow of the device of the present invention.
In the figure, 1-electrode boiler; 2-generator outlet bus and 3-high voltage station transformer; 4-high voltage switch cabinet; 5-a high voltage cable; 6-hot water storage tank; 7-circulation hot water pump; 8-a valve; 9-hot water pipeline; 10-hot water delivery pump; 11-a turbine regenerative system; 12-a demineralized water replenishing pump; 13-a demineralized water conduit; 14-chemical desalting water tank; 15-control system.
Detailed Description
The following describes the essential contents of the present invention with reference to the drawings and examples.
The first embodiment is as follows:
as shown in fig. 1, the utility model discloses a coal-fired unit electric wire netting frequency modulation peak regulation coupling device, including electrode boiler 1 and hot water storage tank 6, hot water storage tank water inlet is connected through the control valve to electrode boiler's hot water delivery outlet, and electrode boiler's cold water input port is through control valve, circulation hot water pump 7, control valve connection hot water storage tank delivery port.
The other water inlet of the hot water storage tank is connected with a water replenishing water tank through a control valve, a water replenishing pump and a control valve; the other water outlet of the hot water storage tank is connected with a turbine heat regenerative system 11 through a control valve, a hot water delivery pump 10 and the control valve;
the electrode boiler is sequentially connected with a high-voltage station transformer 3, a high-voltage switch cabinet 4 and a generator outlet bus 2 through a high-voltage cable 5, and each pump and each valve are respectively connected with a control unit.
When the frequency of the power grid is modulated, the electrode boiler is quickly started, and the electric power at the outlet of the generator is consumed to heat the water in the hot water storage tank, so that the frequency modulation of the power grid is realized; the amplitude of the power grid peak shaving is realized by adjusting the power of the electrode boiler, the time length of the power grid peak shaving is realized by adjusting the water quantity and the water temperature in the hot water storage tank; and after the peak regulation is finished, supplementing hot water in the hot water storage tank to a turbine regenerative system for utilization.
The working process of the device is divided into four parts, namely an electrode boiler 1 controlled by a high-voltage switch cabinet 4 and used for heating water in a hot water storage tank 6 during working, the heated hot water in the hot water storage tank 6 is conveyed to a turbine regenerative system 11 by a hot water conveying pump 10, demineralized water in a chemical demineralized water tank 14 is supplemented to the hot water storage tank 6 by a demineralized water supplementing pump 12, and the four parts are all provided with an intelligent control system, wherein the electrode boiler 1 is controlled by a control system 15 through the high-voltage switch cabinet 4, is connected with a generator outlet bus 2 through a high-voltage station transformer 3 through a high-voltage cable 5, and works according to a power grid dispatching instruction to heat the water in the hot water storage tank;
the hot water storage tank 6 is connected with the circulating hot water pump 7, the valve 8 and the electrode boiler 1 through a hot water pipeline 9, and the heat exchange and storage between the hot water storage tank and the electrode boiler are completed under the control of a control system 15; the hot water storage tank adopts a normal pressure storage tank, the capacity of the hot water storage tank is set according to the peak regulation depth and the peak regulation time of a power grid where a unit is located, and the upper limit of the hot water heating temperature is set to be 90 ℃.
The water quantity in the hot water storage tank 6 is heated, and is controlled and adjusted by a demineralized water pipeline 13, a demineralized water replenishing pump 12 and a chemical demineralized water tank 14 and a control system 15 according to the depth and time of power grid peak shaving; after the standby unit exits from the deep peak shaving state of the power grid, hot water in the hot water storage tank 16 is supplemented into the turbine regenerative system 11 through the hot water delivery pump 10, so that heat is effectively recovered, and recycling is realized; the steam turbine heat recovery system supplements hot water in the hot water storage tank to the No. 5 low feeding port of the heat recovery system, and is better matched with the efficient energy utilization of the system. Therefore, the quick response power grid frequency modulation is realized, the deep peak regulation is realized by coordinating with a unit boiler, the safe and reliable operation of the unit is ensured, the double compensation of the power auxiliary service of the frequency modulation and the peak regulation is fully enjoyed, the flexibility and the overall economy of the unit participating in the power grid frequency modulation and the peak regulation are greatly improved, and the safe, environment-friendly and economic operation of the unit is realized.
The purpose of the above-described embodiments is to specifically describe the material of the present invention, but those skilled in the art should understand that the protection scope of the present invention should not be limited to the specific embodiments.
Claims (10)
1. The utility model provides a coal-fired unit electric wire netting frequency modulation peak shaver coupling device which characterized in that: the electrode boiler is characterized by comprising an electrode boiler and a hot water storage tank, wherein a hot water outlet of the electrode boiler is connected with a water inlet of the hot water storage tank through a control valve, and a cold water inlet of the electrode boiler is connected with a water outlet of the hot water storage tank through a circulating hot water pump and the control valve; the other water inlet of the hot water storage tank is connected with a water replenishing water tank through a control valve and a water replenishing pump, and the other water outlet of the hot water storage tank is connected with a turbine heat regenerative system through the control valve and a hot water delivery pump; the electrode boiler is sequentially connected with a high-voltage station transformer, a high-voltage switch cabinet and a generator outlet bus through high-voltage cables, and each pump and each valve are respectively connected with the control unit.
2. The coal-fired unit power grid frequency modulation peak shaving coupling device of claim 1, characterized in that: and the steam turbine heat recovery system supplements hot water sent by the hot water storage tank to a No. 5 low feeding port of the heat recovery system.
3. The coal-fired unit power grid frequency modulation peak shaving coupling device of claim 2, characterized in that: the control valves are all electromagnetic valves.
4. The coal-fired unit power grid frequency modulation peak shaving coupling device of claim 2, characterized in that: the water replenishing water tank is a chemical desalting water tank.
5. A coal-fired unit power grid frequency modulation peak-load regulation coupling device as claimed in any one of claims 1-4, characterized in that: the coal-fired unit is a coal-fired straight condensing unit and a coal-fired heat supply unit in the non-heating period.
6. The coal-fired unit power grid frequency modulation peak shaver coupling device of claim 5, characterized by: the hot water storage tank adopts a normal pressure storage tank.
7. The coal-fired unit power grid frequency modulation peak shaver coupling device of claim 6, characterized by: the upper limit of the heating temperature of the hot water in the hot water storage tank is set to 90 ℃.
8. The coal-fired unit power grid frequency modulation peak shaver coupling device of claim 6, characterized by: and the capacity of the hot water storage tank is set according to the peak shaving depth and the peak shaving time of the power grid where the unit is located.
9. The coal-fired unit power grid frequency modulation peak shaver coupling device of claim 6, characterized by: the hot water storage tank consists of a hot water pipeline, a circulating hot water pump, a valve and an electrode boiler.
10. The coal-fired unit power grid frequency modulation peak shaving coupling device of claim 1, characterized in that: after the unit exits from the deep peak shaving state of the power grid, hot water in the hot water storage tank is supplemented into the turbine regenerative system through the hot water delivery pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920913724.3U CN210152740U (en) | 2019-06-18 | 2019-06-18 | Coal-fired unit electric wire netting frequency modulation peak shaver coupling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920913724.3U CN210152740U (en) | 2019-06-18 | 2019-06-18 | Coal-fired unit electric wire netting frequency modulation peak shaver coupling device |
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| CN210152740U true CN210152740U (en) | 2020-03-17 |
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| CN201920913724.3U Active CN210152740U (en) | 2019-06-18 | 2019-06-18 | Coal-fired unit electric wire netting frequency modulation peak shaver coupling device |
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Address after: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee after: National Energy Group Science and Technology Research Institute Co.,Ltd. Address before: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee before: GUODIAN SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |