CN-115977753-B - Multipurpose energy storage peak shaving power generation system

CN115977753BCN 115977753 BCN115977753 BCN 115977753BCN-115977753-B

Abstract

The invention discloses a multipurpose energy storage peak shaving power generation system which comprises a power generation unit, an energy storage component and an energy release component, wherein the power generation unit is provided with a reheat steam output end and a condensate output end, the energy storage component is provided with a reheat steam input end and an electric power output end, the reheat steam output end is connected with the reheat steam input end through a pipeline, the energy release component comprises an electrolytic tank and a steam generator, the condensate output end is connected with the electrolytic tank and the steam generator through a pipeline, and the electric power output end is connected with the electrolytic tank and the steam generator through a cable. When the unit peak regulation is carried out, reheat steam of the unit is extracted, so that the steam quantity entering the steam turbine is reduced, and the generated energy is reduced. The extracted steam generates electricity through the energy storage component and stores electric energy, the stored electric energy electrolyzed water can produce oxygen to produce hydrogen to increase benefits for a power plant, and can also heat the water to form superheated steam for auxiliary steam or adjacent machine preheating, so that dependence of the auxiliary steam on unit steam extraction is reduced, unit efficiency is improved, and unit coal consumption is reduced.

Inventors

LIN YICUN
Tan Xiangshuai
PU JIANGUO
WU QINGYUN
LIAO JUNLIN
LI XIAOFEI
YANG TIANYU
YAO ZHI
GUO YUNFEI
LI ZHAO
ZHAO WEI
WU GANG
ZHAO RUYU
WANG TAO
ZHANG QUAN
YAN WENCHEN
ZHANG MINGLI
LI ZHENGKUAN
GAO JINGHUI
NIU LITAO

Assignees

西安热工研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20230119

Claims (9)

1. A multipurpose energy storage peak shaving power generation system comprising: the generator set is provided with a reheat steam output end and a condensate output end; the generator set comprises a high-pressure cylinder, a reheater, a medium-pressure cylinder, a low-pressure cylinder and a condenser which are sequentially connected, wherein a pipeline between the output end of the high-pressure cylinder and the input end of the reheater is a cold re-pipeline, the output end of the high-pressure cylinder is the reheated steam output end, and the output end of the condenser is the condensed water output end; The energy storage assembly is provided with a reheat steam input end and an electric power output end, the reheat steam output end is connected with the reheat steam input end through a pipeline, the energy storage assembly comprises an energy storage turbine, an energy storage generator and an energy storage module, the energy storage turbine is connected with the energy storage generator, the energy storage generator is connected with the energy storage module, the energy storage assembly generates electricity by utilizing the reheat steam conveyed by the generator set and stores electric energy in the energy storage module, and the energy storage assembly is configured to be put into operation when the generator set responds to a power grid peak regulation instruction so as to extract the reheat steam and reduce the steam quantity entering the reheater; The energy release assembly comprises an electrolytic tank and a steam generator, wherein a pipeline between the condenser and the electrolytic tank and the steam generator comprises a condensed water pipeline, a first conveying pipeline and a second conveying pipeline, the condensed water pipeline is connected with the condensed water output end, one end of the first conveying pipeline is connected with the condensed water pipeline, the other end of the first conveying pipeline is connected with the electrolytic tank, one end of the second conveying pipeline is connected with the condensed water pipeline, the other end of the second conveying pipeline is connected with the steam generator, a condensed water fine treatment device is arranged on the condensed water pipeline, the condensed water output end is connected with the electrolytic tank through a pipeline so as to convey condensed water to the electrolytic tank, the electric power output end is connected with the electrolytic tank through a pipeline so as to convey condensed water to the steam generator, the electric power output end is connected with the steam generator through a pipeline so as to supply power to the steam generator, and the electric power output end is used for heating the pre-heater or the pre-heater.
2. The multipurpose energy storage peaking generation system of claim 1, wherein the reheat steam input is located on the energy storage turbine and the power output is located on the energy storage module.
3. The multipurpose energy-storing peak shaving power generating system according to claim 2, wherein the energy-storing assembly further comprises a steam extraction pipeline, one end of the steam extraction pipeline is connected with the cold re-pipeline, the other end of the steam extraction pipeline is connected with the reheat steam input section, and a steam extraction shutoff door is arranged on the steam extraction pipeline.
4. The multipurpose energy-storing peak shaving power generating system according to claim 3, wherein the exhaust steam pipe is provided with an exhaust steam shut-off door.
5. The multipurpose energy-storing peak shaving power generating system according to claim 4, wherein the condensed water pipeline is further provided with a condensed water pump, and the condensed water pump and the condensed water treating device are distributed at intervals along the flowing direction of the condensed water.
6. The multipurpose energy storage peak shaving power generation system of claim 4, wherein a first condensate water shut-off gate is provided on the first delivery conduit and a second condensate water shut-off gate is provided on the second delivery conduit.
7. The multipurpose energy storage peak shaving power generation system of claim 2, wherein a first switch is provided on the cable between the energy storage module and the electrolyzer, and a second switch is provided on the cable between the energy storage module and the steam generator.
8. The multipurpose energy-storage peak shaving power generation system according to claim 1, wherein the output end of the electrolytic tank is connected with a mass supply pipeline, and a mass supply shut-off door is arranged on the mass supply pipeline.
9. The multipurpose energy-storing peak shaving power generating system according to claim 1, wherein the output end of the steam generator is connected with a steam supply pipeline, and a steam supply shut-off door is arranged on the steam supply pipeline.

Description

Multipurpose energy storage peak shaving power generation system Technical Field The invention relates to the technical field of power grid peak shaving, in particular to a multipurpose energy-storage peak shaving power generation system. Background With the reform of the electric power system, the requirements of the power grid side on the power generation side are gradually increased, and the power generation side is required to be capable of timely responding to the peak shaving requirements of the power grid side. However, frequent changes of the load on the power generation side can lead to changes of the main steam temperature of the unit, cause rapid changes of the thermal stress of the unit, cause certain fatigue to the metal of the unit and threaten the safe operation of the unit. Disclosure of Invention The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides a multipurpose energy storage peak shaving power generation system, and a unit of the system has the characteristics of high efficiency and low coal consumption. The multipurpose energy storage peak shaving power generation system comprises a power generation set, an energy storage assembly and an energy release assembly, wherein the power generation set is provided with a reheat steam output end and a condensate output end, the energy storage assembly is provided with a reheat steam input end and an electric power output end, the reheat steam output end is connected with the reheat steam input end through a pipeline so that the energy storage assembly can generate power by utilizing reheat steam conveyed by the power generation set and store electric energy, the energy release assembly comprises an electrolytic tank and a steam generator, the condensate output end is connected with the electrolytic tank through a pipeline so as to convey condensate to the electrolytic tank, the electric power output end is connected with the electrolytic tank through a cable so as to supply power to the electrolytic tank, the condensate output end is connected with the steam generator through a pipeline so as to convey condensate to the steam generator, and the electric power output end is connected with the steam generator through a cable so as to supply power to the steam generator. According to the multipurpose energy storage peak shaving power generation system, reheat steam of the generator set is extracted when the generator set is in peak shaving, so that the steam quantity entering the steam turbine is reduced, and the generated energy is reduced. The boiler load of the generator set is not required to be increased or decreased excessively, frequent fluctuation of the temperature of the main steam and the reheat steam is avoided, and metal fatigue caused by the fluctuation of the steam temperature is effectively prevented. And, the extracted steam generates electricity through the energy storage assembly and stores the electric energy. The electrolyzer utilizes the stored electric energy to electrolyze water to produce oxygen for increasing the income of the power plant, and the steam generator utilizes the stored electric energy to heat water into superheated steam. The superheated steam can be used for auxiliary steam, so that the dependence of the auxiliary steam on the steam extraction of the generator set during the normal operation of the generator set is reduced, the efficiency of the generator set is improved, and the coal consumption of the generator set is reduced. The superheated steam can also provide pre-heating steam for the quick start pre-heating of the adjacent machine. In some embodiments, the energy storage assembly comprises an energy storage turbine, an energy storage generator and an energy storage module, wherein the energy storage turbine is connected with the energy storage generator, the energy storage generator is connected with the energy storage module, the reheat steam input end is located on the energy storage turbine, and the power output end is located on the energy storage module. In some embodiments, the generator set comprises a high-pressure cylinder, a reheater, a medium-pressure cylinder, a low-pressure cylinder and a condenser which are sequentially connected, wherein a pipeline between the output end of the high-pressure cylinder and the input end of the reheater is a cold-secondary pipeline, the output end of the high-pressure cylinder is the reheat steam output end, the output end of the condenser is the condensate water output end, the energy storage assembly further comprises a steam extraction pipeline, one end of the steam extraction pipeline is connected with the cold-secondary pipeline, the other end of the steam extraction pipeline is connected with the reheat steam input section, and a steam extraction shutoff door is arranged on the steam extraction pipeline. In some embodiments, the energy stora