A heating network regulation method using energy storage in the heating pipe network

Abstract

The invention provides a power plant heat-supply energy storage technology, and relates to a heat-supply pipe network energy storage technology and heat-supply network regulation method for conducting regulation through a primary station and a secondary station in a cooperative manner. According to the regulation method, through the combination of control over the water supply and return temperature of a primary network and regulation of bypass flow of the side of a secondary network, the energy storage process and the heat release process of the primary pipe network are completed at the high-load stage and the low-load stage of a unit correspondingly, and therefore on the premise of ensuring the heating load within the heating period, the heat-supply peak regulation capacity of the thermoelectricity unit is improved, and the consumption difficulty of renewable energy resources is effectively relieved.

Description

technical field [0001] The application is applicable to the field of heat supply of power plants, and in particular relates to a heat supply pipe network energy storage technology and a heat network adjustment method for coordinated adjustment of a primary station and a secondary station. Background technique [0002] At present, my country's electricity market shows new and obvious characteristics, that is, the peak-to-valley difference of power load in the power system is getting larger and longer, and the duration is also increasing. On the one hand, due to the development of social economy, the peak-to-valley difference of power load has increased , the randomness of electricity load is strengthened; on the other hand, it is because of the increase in the proportion of new energy power generation. In view of the pressure of emission reduction and the inherent defects of new energy power generation, thermal power units will be the main force for peak regulation in the powe...

AI Technical Summary

Problems solved by technology

The Chinese patent application number 201410721211.4 discloses a combined central heating and cooling system with a heat storage tank, which can stabilize the energy consumption through the heat storage function of the large heat storage tank at low load and the energy discharge function at high load. Energy load plays the role of shifting peaks and filling valleys, but the initial investment cost of heat storage devices is relatively high, and the occupied area is relatively large. For example, the diameter of the heat storage tank of Beijing Zuojiazhuang Thermal Power Plant is 23m, the total height is 25.5m, and the maximum heat storage capacity 628GJ, which can only meet the heating load of 3 million square meters of heating area for less than two hours

The invention patent with application number 210210159123.0 discloses an ultra-high voltage electrothermal energy storage device, which includes energy storage body, heat exchange part, external insulation part, etc. This device is suitable for various voltage levels above 10KV, and the configuration is relatively flexible. During the heat supply process, heat storage can also play a role in shifting peaks and filling valleys, but it also has the disadvantages of high investment costs and large equipment footprints.

[0004] At present, the main method to solve the problem of deep peak regulation in thermal power plants is to increase thermal storage equipment. One solution is to add hot water thermal storage tanks to realize thermoelectric decoupling in thermal power plants. The main defect in the existing technology is that the thermal storage tanks occupy an area The area is large and the cost of equipment is expensive, which increases the difficulty of transformation; the other is the high-voltage solid electric heat storage equipment that is currently used in power plants, which also has the disadvantages of large floor space and high equipment investment costs.

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