Heat power system suitable for deep peak adjusting of heat supply unit and peak adjusting method of heat power system

Abstract

The invention discloses a heat power system suitable for deep peak adjusting of a heat supply unit. The heat power system comprises a heating element, a high-pressure cylinder, a high bypass valve, amedium-pressure cylinder, a low-pressure cylinder, a low bypass valve, a heat supply network heater, a heat supply network heater steam source pipeline, a heat supply network drain pump, a condenser,a condensate water pump and a condensate water precision treatment device. The high bypass valve and the high-pressure cylinder are connected in parallel, one end of the high bypass valve is connectedwith a superheater outlet of the heating element, and the other end of the high bypass valve is connected to a reheater inlet of the heating element. The low bypass valve is connected with the medium-pressure cylinder and the low-pressure cylinder in parallel, one end of the low bypass valve is connected with a reheater outlet of the heating element, and the other end of the low bypass valve is connected to a condenser inlet. The other end of the condenser is sequentially connected with the condensate water pump and the condensate water precision treatment device. One end of the heat supply network heater communicates with the steam exhaust end of the medium-pressure cylinder through the heat supply network heater steam source pipeline, and the other end of the heat supply network heateris connected between the condensate water pump and the condensate water precision treatment device through the heat supply network drain pump. A heat supply network heater standby steam source pipeline connected between the low bypass valve and the heat supply network heater is further included.

Description

technical field [0001] The invention relates to the field of thermal power generation, in particular to a thermal system suitable for deep peak regulation of a heating unit and a peak regulation method thereof. Background technique [0002] The steam source of the heating network heater of the conventional heating unit adopts the exhaust steam of the medium-pressure cylinder of the steam turbine, which can ensure sufficient steam extraction for heating. [0003] But the problem is that during the heating period, when the power grid requires the unit to participate in deep peak regulation (that is, to reduce the power generation of the unit), the unit cannot do so. Because of deep peak regulation (that is, reducing power generation), the steam intake of the unit must be reduced, so that the exhaust steam of the medium-pressure cylinder is also reduced, and it is impossible to extract enough steam to ensure heating. This is the coupling problem of heat supply and power genera...

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Problems solved by technology

[0004] But nowadays, my country's power supply tends to be surplus, and the power grid has higher and higher requirements for units to participate in deep peak regulation. For northern regions, most of the units are heating units. If all power is determined by heat, it will inevitably cause power generation during the heating period. The amount far exceeds the demand for electricity, causing an imbalance

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