SU987122A1 - Control system of central heating turboelectric plant - Google Patents

Description

(54) SYSTEM OF REGULATION OF THERMAL

Turbocharger

one

The invention relates to a power system and can be used to automatically regulate heat-generating turbine units.

Closest to the invention is the control system for a heat-generating turbine unit, containing a fresh steam flow regulator, equipped with a setpoint sensor and a fresh steam flow sensor, and connected to a steam pressure sensor in a heat extraction pump, and a control unit for the turbine unit connected to the fresh steam flow regulator one.

A disadvantage of the known system is reduced reliability due to incomplete consideration of the possibility of reducing the maximum allowable consumption of fresh steam.

The purpose of the invention is to increase reliability.

This goal is achieved by introducing a correction regulator fitted with a pulse integration unit into the system, and the vapor pressure sensor in the selection is connected to the flow regulator through this corrective regulator.

The drawing shows a diagram of the regulation system.

The heat-generating turbine unit has high-pressure parts 1-3 and is connected to a condenser 4, a generator 5, and a main line 6 of the steam extraction steam to a network heater 7, which, however, includes a peak hot-water boiler 8 for heating the network water. The hapoBnycKa actuator 9 and the heat extraction selection regulator 10 are designed to change the flow rate of the pa, Q pa to the turbine unit part 1 and to the steam extraction line 6 according to the signals from the turbine unit control unit 11.

To the input of block 11, a fresh steam flow regulator 12 is connected to a turbine unit, 15 to which a fresh steam flow sensor 13, a unit 15, and a pulse integrator block 16 are connected. The impulse integration unit 16 in the input and output is connected to a correction regulator 17, which is also connected to the vapor pressure sensor 18 in the extraction line 6.

Claims (1)

It is advisable to use the system mainly when the turbine unit operates on a thermal schedule with peak water-heating boilers. In this mode, the regulator 10 is closed completely. The network water is heated not only in the network heater 7, but also in the peak hot-water boiler 8. In this case, the economical mode of operation of the turbine unit corresponds to the maximum heating of the network water in the heater 7, which comes at the maximum steam consumption per turbine unit. At the same time, automatic regulation of the heat-generating turbine unit is carried out as follows. The correction regulator 17, summing the incoming signals from the vapor pressure sensor 18 in selection 6 and from the pulse integrator 16, outputs the output signal through the pulse integrator 16 to the slave regulator 12 of the fresh steam flow. The fresh steam flow controller 12, in turn, receives signals from the fresh steam flow sensor 13 in line 14, the setting device 15 and the pulse integration unit and, acting through block 11 on the actuator 9, maintains the maximum fresh steam consumption per turbine unit depending on the pressure change steam in line 6 selection. For example, with an increase in steam pressure in line 6, which in the stabilization mode of fresh steam consumption may occur, in particular, due to an increase in the return network water temperature, the task to the input of the fresh steam consumption regulator 12 increases. At the same time, an increase in steam consumption is justified, since over a significant range of changes in steam pressure in line 6, the maximum permissible steam consumption per turbine unit increases with increasing steam pressure in the selection. The increase in steam consumption per turbine unit leads to an increase in heat supply from the turbine unit and an increase in highly economical heat generation power generation. With a decrease in steam pressure in line 6, which may occur in the mode of stabilization of the flow of fresh steam, in particular, due to a decrease in the temperature of the return network water, the task to the input of the flow controller of the fresh steam decreases. At that, reduction of steam consumption is minimally necessary and allows not overloading the turbine unit beyond the maximum allowable flow rate, since the maximum allowable steam consumption per turbine unit decreases with decreasing steam pressure in line 6. When the turbine unit operates according to the electrical load schedule, this automatic control system is appropriate to use when, under the conditions of the power system, the maximum use of the electric power of the turbine unit is required, which is also achieved at the maximum steam consumption per turbine unit. The system in these cases works in the same way as in the case of a thermal load diagram, but unit 11 acts not only on the actuator 9 of the steam inlet. but also on the regulatory body 10 of the heat recovery selection, setting a predetermined mode of its operation. Thus, in co-operation modes of a turbine unit with peak water-heating boilers and in modes of maximum utilization of the power of the turbine unit, the system provides an increase in the reliability of the cogeneration unit and the use of its thermal and electric power due to a smooth change in the flow rate of fresh steam per turbine unit depending on the pressure change in the heating selection. Claims The control system of a heat-generating turbine unit, containing a fresh steam flow regulator, equipped with a setpoint sensor and a fresh steam flow sensor and associated with a steam pressure sensor in a heat extraction pump, and a control unit for a turbo unit connected to the output of a fresh steam flow controller, that, in order to increase the reliability, a correction regulator is installed in the system, equipped with a pulse integration unit, and the vapor pressure sensor in the selection is connected to the flow controller and through this adjustment regulator. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 404953, cl. F 01 D 17/08, 1972.