摘要:
Method for controlling steam admission into a steam turbine (1), the turbine (1) comprising a high pressure casing (2), at least one reduced pressure casing (3, 4, 5, 6) and an admission steam control system (13), the high pressure casing (2) and at least one reduced pressure casing (3) comprising control valves (8, 10) for steam admission. The admission steam control system (13) manages the following steps: determining a steam flow demand (14); elaborating a high pressure control valve opening setpoint (16) depending on the determined steam flow demand (14); imposing the elaborated high pressure control valve opening setpoint (16) to the high pressure control valves (8); elaborating a reduced pressure control valve opening setpoint (17) depending on the determined steam flow demand (14) through the dynamic interaction (20) between high pressure control valve opening setpoint and reduced pressure control valve opening setpoint; and imposing the elaborated reduced pressure control valve opening setpoint (17) to the reduced pressure control valves (10).
摘要:
A steam power plant with a low-pressure turbine (1) is suggested with a second low-pressure turbine (21) on a separated shaft line including a separate generator G2. The second low-pressure turbine (21) is connected to an additional condensing system (25) without cooling water consumption, thus allowing to maintain the power output at a high level, even if the main condensing system (17) has a reduced capacity due to cooling water restrictions.
摘要:
Various embodiments include a system (2) having: a computing device configured to control a power plant system (4) including a steam turbine (ST (6)), a gas turbine (GT (16)), and a heat recovery steam generator (HRSG (14)) fluidly connected with the ST (6) and the GT (16), by performing actions including: obtaining data representing a target steam specific enthalpy in a bowl section (30) of the ST (6); determining a current steam pressure at an outlet of the HRSG (14) and a current steam temperature at the outlet of the HRSG (14); calculating an actual steam specific enthalpy in the bowl section (30) of the ST (6) based upon the current steam pressure at the outlet of the HRSG (14) and the current steam temperature at the outlet the HRSG (14); and modifying a temperature of steam entering the ST (6) in response to determining that the calculated actual steam specific enthalpy in the bowl section (30) differs from the target steam specific enthalpy in the bowl section (30) by a threshold.
摘要:
A new steam turbine generation set is disclosed, which at least includes boiler which has an overheating device (11, 13, 15) and a reheating device (12, 16) therein, a connection zone (17) of connection box is located on the boiler corresponding to the connection box for the steam outlets and inlets of overheating device and reheating device; a steam tubing system includes at least a tube (31) which communicates the boiler with a high pressure cylinder (211) and an intermediate pressure cylinder (212) and feeds steam which has high pressure and high temperature; the highly located shaft system consists of the high pressure cylinder and a generator (41) and is positioned outside the boiler near the connection zone of the connection box. Further, the new steam turbine generation set may also include a lowly located shaft system which is positioned at the lower location.
摘要:
A method for generating electricity by means of a thermal power plant (3) and a liquid vaporisation apparatus involves producing heat energy by means of the power plant and using the heat energy to vaporise water or to heat water vapour, expanding the water vapour formed in a first turbine (T1) and using the first turbine to drive an electricity generator (G1) in order to produce electricity, vaporising liquefied gas (15) coming from a cryogenic store (S) in order to produce pressurised gas (17), reheating the pressurised gas with a part of the water vapour intended for the first turbine of the power plant and expanding the pressurised fluid in a second turbine (T2) to produce electricity.
摘要:
The invention relates to a water-steam circuit (1) of a power plant (2), comprising at least one low-pressure steam system (3) and a reservoir (4) for waste water from the water-steam circuit (1), wherein the reservoir (4) has, in addition to at least one waste water feed line (31), a further heat supply (5) from the water-steam circuit (1) and a steam outlet (6) which is connected via a waste steam pipe (7) to the low-pressure steam system (3) of the water-steam circuit (1). The invention also relates to a method for cleaning waste water from a power plant (2) having a water-steam circuit (1), wherein the waste water is conducted into a reservoir (4) and, in addition to a steam fraction generated by automatic evaporation of waste water in the reservoir (4), a water fraction that is also produced is evaporated using energy from the water-steam circuit (1), and the entire steam mass flow is introduced into a low-pressure steam system (3) of the power plant (2).