Power plant and power output increase controlling method for power plant

Abstract

The invention provides a power plant and an output increase control method of the power plant, which do not need a condensate water storage tank or can reduce the capacity of the condensate water storage tank in the aspect of increasing the power generation output of the power plant, and do not depend on the capacity of a degasser. The power plant comprises a boiler (1), a turbine (2, 3, 4), a condenser (6), a feed water heater (9), a deaerator (10), a deaerator water level control valve (30), an extraction valve (31) provided in an extraction system that introduces steam extracted from a turbine into a water supply heater, and an auxiliary steam introduction system (23) that introduces auxiliary steam into the feed water heater (9) is provided in the power plant. And an auxiliary steam regulating valve that is provided in the auxiliary steam introduction system and that regulates the amount of steam supplied to the water supply heater. When a rapid load increase request is made, the control device (100) controls, to orient the extraction valve (31) in a closing direction, to maintain an opening of the deaerator water level control valve (30), and to orient the auxiliary steam control valve (32) in an opening direction.

Description

technical field [0001] The present invention relates to a power generation facility and an output increase control method of the power generation facility. Background technique [0002] For the sudden load increase request of the power generation output of the power generation equipment, there is a method of temporarily increasing the power generation output by closing the exhaust valve and the degasser water level control valve at a constant speed until a fixed opening degree is called condensate throttling operation. A control method of control (for example, Patent Document 1). [0003] In the condensate throttling operation control, since the degasser water level control valve is closed, the condensate flow rate downstream of the degasser water level control valve is temporarily reduced, and the water level of the degasser is lowered. Therefore, it is necessary to install a deaerator having a capacity capable of compensating for a drop in the water level, and providing s...

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to install a degasser with a capacity capable of compensating for a decrease in the water level, and the installation of such a degasser has a problem of increasing equipment costs.

[0004] In addition, in order to prevent the water level in the condenser from rising due to the closing control of the water level control valve of the degasser, it is necessary to install a condensate storage tank (Cold CondensateStorage Tank, hereinafter referred to as CCST), setting such a CCST will cause further increase in equipment cost

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