CN211851929U - Quick response automatic power generation control system during operation of heat supply cylinder cutting unit - Google Patents
Quick response automatic power generation control system during operation of heat supply cylinder cutting unit Download PDFInfo
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- CN211851929U CN211851929U CN202020348952.3U CN202020348952U CN211851929U CN 211851929 U CN211851929 U CN 211851929U CN 202020348952 U CN202020348952 U CN 202020348952U CN 211851929 U CN211851929 U CN 211851929U
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Abstract
The utility model discloses a quick response automatic power generation control system when a heat supply cylinder cutting unit operates, which comprises a high-pressure cylinder steam inlet regulating valve arranged at the inlet of a high-pressure cylinder of a steam turbine, a PID controller connected with the high-pressure cylinder steam inlet regulating valve, a low-pressure cylinder steam inlet regulating butterfly valve arranged between a middle cylinder and a low-pressure cylinder of the steam turbine, and a function generator and a PI controller connected with the low-pressure cylinder steam inlet regulating butterfly valve; two paths of input signals of the PID controller are respectively an automatic power generation control instruction signal and a power generation actual load signal of the electric power sensor; the input signal of the function generator is an automatic power generation control command signal; two paths of input signals of the PI controller are respectively an exhaust pressure measured value of an intermediate pressure cylinder exhaust pressure measuring point between the intermediate pressure cylinder and the low pressure cylinder of the steam turbine and an exhaust pressure set value of the intermediate pressure cylinder of the steam turbine; when the automatic power generation control instruction of the heat supply cylinder cutting unit changes, the steam inlet adjusting butterfly valves of the high-pressure cylinder and the low-pressure cylinder are adjusted simultaneously; the two paths of signals act together to meet the requirement of load change of the heat supply cylinder cutting unit.
Description
Technical Field
The utility model relates to a thermal power station automatic control technical field, the automatic power generation control system of quick response when concretely relates to cylinder unit operation is cut in heat supply.
Background
In recent years, the installed capacity of new energy electric power such as wind power, photovoltaic and hydropower in China is continuously and rapidly increased, and the installed capacity in service and under construction is the first in the world. New energy sources such as wind power and photovoltaic power provide a large amount of clean power for people, but on the other hand, the randomness and instability of generated output of the new energy sources also bring great challenges to the safe operation and power supply guarantee of a power system. The power system regulating capacity needs to be adapted to the requirements of large-scale development and consumption of new energy, particularly in the three-north region, a large number of thermal power generating units undertake the heat supply tasks of residents in winter, but wind power is generally high in the winter and the season in the local area, and the power load is not obviously increased, so that the problems of relatively serious wind abandoning, light abandoning and water abandoning appear in part of the region. In order to improve the consumption capacity of new energy, the peak-load-adjusting and frequency-modulating potential of the thermal power generating unit is excavated, and the load regulation flexibility of the thermal power generating unit is improved, wherein the cylinder switching operation of the low-pressure cylinder (or the zero-output operation of the low-pressure cylinder) is an important means of thermoelectric decoupling, so that the heat supply requirement of residents can be guaranteed, the electric load can be obviously reduced, and the consumption capacity of clean energy such as wind, light and the like is improved.
However, the flexible operation requirement of the power grid for the generator set needs thermoelectric decoupling, reduces the minimum power generation load to absorb clean energy, and also needs to be capable of quickly and flexibly adjusting the power generation load to adapt to intermittent fluctuation of clean energy such as wind and light, so as to maintain the power balance and stability of the whole power grid. Therefore, Automatic Generation Control (AGC) is an indispensable important technology of a power grid, is one of important measures for ensuring the safety and economic operation of the power grid, and is also one of important functions of a power grid dispatching automation system. In order to encourage and compensate the automatic power generation control unit, a compensation assessment measurement method is provided for the automatic power generation control in two rules of power grid, and the performance index requirement for the flexible adjustment of the power generator unit is defined.
The principle of automatic power generation control assessment in the two rules of each power grid is that the automatic power generation control assessment indexes comprise a usability index KAAdjusting performance index K1(rate of adjustment), K2(precision of adjustment), K3(response time).
In recent years, the heat supply cylinder cutting technology is a great breakthrough to the original heat supply operation mode, and compared with the technologies such as high-backpressure heat supply, optical axis heat supply transformation and the like, the heat supply cylinder cutting technology can realize the non-stop flexible switching of a heat supply unit between a steam extraction and steam condensation type operation mode and a high-backpressure operation mode. The core of the technology is that only a small amount of cooling steam is reserved to enter a low-pressure cylinder, so that zero output operation of a low-pressure rotor is realized, and the electric load is reduced; more steam enters the heating system, and the heating capacity is improved.
Although the problems of deep peak regulation and thermoelectric decoupling can be well solved by the cylinder supply and heat cut unit, the load regulation process of the cylinder supply and heat cut unit reduces the participation of the output change of the low-pressure cylinder, and the actual unit load change corresponding to the same valve position instruction is only equivalent to 70% -80% of the pure condensation working condition according to the calculation of 20% -30% of the power proportion of the low-pressure cylinder. In addition, when the cylinder is switched in a heating mode, the adjusting capacity of the auxiliary heating load is 0, so that the speed, the amplitude and the steady-state adjusting time of the cylinder switching unit responding to the automatic power generation control are correspondingly and greatly reduced. In addition, the conventional unit mainly depends on short-time boiler heat storage to support the steam turbine to rapidly increase flow and power along with an automatic power generation control instruction. The heat supply cylinder switching unit is operated at the position where the opening of the throttle of the steam turbine is close to the upper limit for a long time in order to ensure the heat supply flow and the load demand, so that when the automatic power generation control instruction comes to an upward action, the steam turbine cannot open the throttle upwards to increase the flowAnd the amount and the power cause that the unit cannot respond to an automatic power generation control instruction, and the actual load increases slowly. At present, the automatic power generation control examination phenomenon is serious when the type of cylinder cutting machine set for heat supply runs in winter in the heat supply period, and K1、K2、K3The value can not reach the standard. In view of the situation, measures are urgently needed to be taken to optimize and modify the control system of the device.
Disclosure of Invention
In order to solve the problems existing in the prior art, the utility model aims to provide a quick response automatic power generation control system when the cylinder unit is cut in the heat supply for the cylinder unit is cut in the heat supply during the heat supply operation, guarantees under the prerequisite of heat supply, also can satisfy the examination requirement of electric wire netting to automatic power generation control.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the quick response automatic power generation control system when the heat supply cylinder cutting unit operates comprises a high-pressure cylinder steam inlet regulating valve 1 arranged at the inlet of a high-pressure cylinder 2 of a steam turbine, a PID controller 13 connected with the high-pressure cylinder steam inlet regulating valve, a low-pressure cylinder steam inlet regulating butterfly valve 5 arranged on a low-pressure communicating pipe between a medium-pressure cylinder 4 and a low-pressure cylinder 6 of the steam turbine, a function generator 14 and a PI controller 15 connected with the low-pressure cylinder steam inlet regulating butterfly valve, and a heat supply main pipe pressure regulating butterfly valve 16 and a heat supply main pipe pressure measuring point 17 which are arranged on a steam extraction pipeline of the medium-pressure cylinder; the two paths of input signals of the PID controller 13 are an automatic power generation control instruction signal 12 and a power generation actual load signal of an electric power sensor 10 arranged at the output end of the generator respectively; the input signal of the function generator 14 is an automatic power generation control command signal 12; two input signals of the PI controller 15 are respectively an exhaust pressure measured value of an intermediate pressure cylinder exhaust pressure measuring point 9 on a low pressure communicating pipe between the turbine intermediate pressure cylinder 4 and the turbine low pressure cylinder 6 and a turbine intermediate pressure cylinder exhaust pressure set value 11.
The utility model discloses a control method of quick response automatic power generation control system when heat supply cylinder cutting unit moves, when heat supply cylinder cutting unit automatic power generation control command changes, automatic power generation control command signal 12 changes fast, and the deviation appears between the actual load signal of electricity generation that comes from electric power sensor 10, activates PID controller 13 output action, adjusts high-pressure cylinder admission governing valve 1; meanwhile, due to the change of the automatic power generation control command signal 12, the output of the function generator 14 is also acted, and the low-pressure cylinder steam inlet adjusting butterfly valve 5 is adjusted; the two paths of signals act together to meet the requirement of load change of the heat supply cylinder cutting unit.
The specific control method comprises the following steps: the high-pressure cylinder steam inlet regulating valve 1 adopts the regulation of a PID controller 13, and the PID controller 13 comprises a proportion (P) function, an integral (I) function and a differential (D) function; when the automatic power generation control instruction signal 12 gives a load-lifting instruction, the differential (D) action of the PID controller 13 can directly give an instruction of opening and adjusting the valve to the high-pressure cylinder steam inlet regulating valve 1, and meanwhile, because positive deviation occurs between the automatic power generation control instruction signal 12 and the actual power generation load signal of the electric power sensor 10, the proportional (P) action and the integral (I) action of the PID controller 13 start to act, and the instruction of opening and adjusting the valve is sent out to meet the load-lifting requirement of the heat supply cylinder-switching unit; similarly, when the automatic generation control command signal 12 gives a load reduction command, the differential (D) action of the PID controller 13 will directly give a command of closing the regulating valve to the high-pressure cylinder steam inlet regulating valve 1, and at the same time, because a negative deviation occurs between the automatic generation control command signal 12 and the actual load signal of the electric power sensor 10, the proportional (P) action and the integral (I) action of the PID controller 13 start to act, and a command of closing the regulating valve is given, so as to meet the load reduction requirement of the heat supply cylinder switching unit;
the regulation of the low-pressure cylinder steam inlet regulating butterfly valve 5 adopts two ways of regulation combined action and is divided into an automatic power generation control instruction stable working condition and an automatic power generation control instruction change working condition;
when the automatic power generation control instruction is stable, in the normal heat supply period, the exhaust steam pressure of a medium pressure cylinder of the steam turbine needs to be maintained within an allowable range, and the steam turbine is dangerous due to overhigh pressure, so that the limit value of trip is triggered; when the pressure is too low and the pressure of a heat supply main pipe required by normal heat supply cannot be maintained, when an automatic power generation control instruction is stable, the aim is achieved through the PI controller 15, a demand signal from a set value 11 of the exhaust steam pressure of the intermediate pressure cylinder is met through a proportional (P) action and an integral (I) action, and when a measured value of the exhaust steam pressure measuring point 9 of the intermediate pressure cylinder is higher than the set value 11 of the exhaust steam pressure of the intermediate pressure cylinder, the proportional (P) action and the integral (I) action enable the low-pressure cylinder to close the steam inlet adjusting butterfly valve 5; when the exhaust pressure measured value of the exhaust steam pressure measuring point 9 of the intermediate pressure cylinder is lower than the exhaust steam pressure set value 11 of the intermediate pressure cylinder, the low-pressure cylinder steam inlet adjusting butterfly valve 5 is opened under the action of the proportion (P) and the integral (I), so that the exhaust steam pressure measured value of the exhaust steam pressure measuring point 9 of the intermediate pressure cylinder meets the operation requirement;
when the automatic power generation control instruction changes, the function generator 14 directly carries out prediction adjustment on the low-pressure cylinder steam inlet adjusting butterfly valve 5, and because the too fast and too large opening of the low-pressure cylinder steam inlet adjusting butterfly valve of the heat supply cylinder switching unit can affect the heat supply pressure, the upper limit and the lower limit of an output value are set in the function generator 14 by combining the actual operation condition of the heat supply unit, so that the safety of the unit is ensured; the middle section of the function is processed according to linearization;
because the high-pressure cylinder steam inlet regulating valve 1 and the low-pressure cylinder steam inlet regulating butterfly valve 5 act simultaneously, the measured value of the steam exhaust pressure of the intermediate pressure cylinder steam exhaust pressure measuring point 9 and the measured value of the pressure of the heat supply main pipe pressure measuring point 17 are influenced, the control of the measured value of the steam exhaust pressure of the intermediate pressure cylinder steam exhaust pressure measuring point 9 is completed by the PI controller 15, and the control method is the same as the control method when the automatic power generation control instruction is stable; the pressure change range of the heat supply main pipe pressure measuring point 17 needs to be maintained in a normal range, and when the pressure measuring value of the heat supply main pipe pressure measuring point 17 is too low, the heat supply main pipe pressure adjusting butterfly valve 16 needs to be manually opened; when the pressure measurement value of the heat supply main pipe pressure measurement point 17 is too high, the pressure regulating butterfly valve 16 of the heat supply main pipe needs to be manually closed down to ensure the heat supply safety.
The upper limit and the lower limit of the output value set in the function generator 14 are 25 and 5 respectively; the value corresponding to the lowest stable combustion load (40% rated load) in the winter heating period is set to 5, and the value corresponding to the highest load (80% rated load) that can be achieved is set to 25.
The normal range of the pressure variation range of the heat supply main pipe pressure measuring point 17 is maintained as follows: when the hot water supply side circulating pump is a steam-operated unit, the pressure change range of the heat supply main pipe pressure measuring point 17 needs to be maintained at 0.2-0.3MPa, and when the hot water supply side circulating pump is an electric unit, the pressure change range of the heat supply main pipe pressure measuring point 17 needs to be maintained at 0.03-0.05 MPa.
Compared with the prior art, the utility model discloses possess following advantage:
1) the utility model discloses control system can effectively improve the automatic power generation control performance that the jar unit was cut in the heat supply, and its advantage is that after having increased the regulating action of low pressure jar admission regulation butterfly valve 5, when the jar unit automatic generation control command changes is cut in the heat supply, except that steam turbine high pressure jar output can change thereupon. The output power of the turbine intermediate pressure cylinder and the turbine low pressure cylinder can change along with the change of the output power, so that the high pressure cylinder, the intermediate pressure cylinder and the low pressure cylinder of the heat supply cylinder switching unit can effectively and quickly respond when the automatic power generation control command is increased, and the quick load response capability of the unit is improved.
2) Control method can satisfy the requirement of quick, accurate response to the automatic electricity generation control command when supplying heat and cutting jar unit operation. Meanwhile, the stability of medium discharge pressure and the stability of heat supply flow and pressure are maintained, and further guarantee is provided for economic and safe operation of a power plant.
Drawings
Fig. 1 is a schematic diagram of the system structure of the present invention.
In the figure: 1-high pressure cylinder steam inlet regulating valve; 2-high pressure cylinder of steam turbine; 3-reheater; 4-turbine intermediate pressure cylinder; 5-low pressure cylinder steam inlet adjusting butterfly valve; 6, a low-pressure cylinder of the steam turbine; 7-generator set rotor; 8-a generator; 9-measuring point of exhaust steam pressure of the intermediate pressure cylinder; 10-electric power sensor; 11-set value of exhaust steam pressure of the intermediate pressure cylinder; 12 — automatic generation control command signal; 13-PID controller; 14-function generator; 15-PI controller; 16-pressure regulating butterfly valve of heat supply main pipe; 17-heat supply main pipe pressure measuring point.
Detailed Description
As shown in fig. 1, the utility model relates to a quick response automatic power generation control system when heat supply cylinder cutting unit operates, which comprises a high pressure cylinder steam inlet regulating valve 1 installed at the inlet of a high pressure cylinder 2 of a steam turbine and a PID controller 13 connected with the high pressure cylinder steam inlet regulating valve, a low pressure cylinder steam inlet regulating butterfly valve 5 installed on a low pressure communicating pipe between a medium pressure cylinder 4 of the steam turbine and a low pressure cylinder 6 of the steam turbine, a function generator 14 and a PI controller 15 connected with the low pressure cylinder steam inlet regulating butterfly valve, a heat supply main pipe pressure regulating butterfly valve 16 and a heat supply main pipe pressure measuring point 17 installed on a steam extraction pipeline of the medium pressure cylinder 4 of the; the two paths of input signals of the PID controller 13 are an automatic power generation control instruction signal 12 and a power generation actual load signal of an electric power sensor 10 arranged at the output end of the generator respectively; the input signal of the function generator 14 is an automatic power generation control command signal 12; two input signals of the PI controller 15 are respectively an exhaust pressure measured value of an intermediate pressure cylinder exhaust pressure measuring point 9 on a low pressure communicating pipe between the turbine intermediate pressure cylinder 4 and the turbine low pressure cylinder 6 and a turbine intermediate pressure cylinder exhaust pressure set value 11.
As shown in fig. 1, the control method of the rapid response automatic power generation control system when the cylinder cutting unit for heating operation of the utility model is operated, when the control command for automatic power generation of the cylinder cutting unit for heating operation is changed, the control command signal for automatic power generation 12 is rapidly changed, and the deviation occurs between the control command signal and the actual load signal for power generation from the electric power sensor 10, so as to activate the output action of the PID controller 13, and adjust the steam inlet adjusting valve 1 of the high pressure cylinder; meanwhile, due to the change of the automatic power generation control command signal 12, the output of the function generator 14 is also acted, and the low-pressure cylinder steam inlet adjusting butterfly valve 5 is adjusted; the two paths of signals act together to meet the requirement of load change of the heat supply cylinder cutting unit.
The specific working principle is as follows: when the automatic power generation control instruction of the heat supply cylinder switching unit is changed, the high-pressure cylinder steam inlet regulating valve 1 and the low-pressure cylinder steam inlet regulating butterfly valve 5 act together.
The specific control method comprises the following steps: the high-pressure cylinder steam inlet regulating valve 1 adopts the regulation of a PID controller 13, and the PID controller 13 comprises a proportional (P) function, an integral (I) function and a differential (D) function. When the automatic power generation control instruction signal 12 gives a load-lifting instruction, the differential (D) action of the PID controller 13 can directly give an instruction of opening and adjusting the valve to the high-pressure cylinder steam inlet regulating valve 1, and meanwhile, because a positive deviation occurs between the automatic power generation control instruction signal 12 and the actual power generation load signal of the electric power sensor 10, the proportional (P) action and the integral (I) action of the PID controller 13 start to act, and the instruction of opening and adjusting the valve is sent out, so that the load-lifting requirement of the heat supply cylinder-switching unit is met. Similarly, when the automatic generation control command signal 12 gives a load reduction command, the differential (D) action of the PID controller 13 will directly give a command of closing the regulating valve to the high-pressure cylinder steam inlet regulating valve 1, and at the same time, because a negative deviation occurs between the automatic generation control command signal 12 and the actual load signal of the electric power sensor 10, the proportional (P) action and the integral (I) action of the PID controller 13 start to act, and a command of closing the regulating valve is given, so as to meet the load reduction requirement of the heat supply cylinder switching unit.
The strategy only depends on the high-pressure cylinder steam inlet regulating valve 1 to work, has the advantages of simplicity and easiness in operation, and can meet the requirements of most heat supply units. But the disadvantage is that the operation requirement can not be satisfied when the device is applied to a heat supply cylinder cutting machine set. Because the high-pressure cylinder steam inlet regulating valve 1 is independently and rapidly opened or closed, steam needs to sequentially do work through the high-pressure cylinder of the steam turbine, the boiler reheater and the intermediate pressure cylinder of the steam turbine, the flow of the working steam entering the intermediate pressure cylinder of the steam turbine cannot be obviously changed within a short time (10-13s), the increased or decreased steam quantity cannot enter the low-pressure cylinder of the steam turbine to continue to do work, and the increased or decreased steam quantity directly enters the heat supply main pipe through the heat supply main pipe pressure regulating butterfly valve 16, so that the automatic power generation control response is relatively lagged compared with a non-heat supply cylinder switching. Therefore, the utility model discloses control system has increased the auxiliary control strategy of low pressure cylinder admission regulation butterfly valve 5 on this conventional method basis.
The adjustment of the low-pressure cylinder steam inlet adjusting butterfly valve 5 adopts two-way adjustment combined action and is divided into an automatic power generation control instruction stable working condition and an automatic power generation control instruction change working condition.
When the automatic generation control instruction is stable, because the utility model discloses only cut jar unit to the heat supply, so guarantee the stability of heat supply and just seem very important. During normal heat supply, the exhaust pressure of a pressure cylinder in the steam turbine needs to be ensured to be maintained within an allowable range (normally, the exhaust pressure is maintained at 0.3-0.4MPa), and the limit value of tripping is triggered because the steam turbine is dangerous due to overhigh pressure; this pressure is too low to maintain the pressure of the heating mains required for normal heating. Therefore, when the automatic power generation control instruction is stable, the target needs to be realized through the PI controller 15, the requirement signal from the set exhaust pressure value 11 of the intermediate pressure cylinder is met through the proportional (P) action and the integral (I) action, and when the exhaust pressure measured value of the exhaust pressure measuring point 9 of the intermediate pressure cylinder is higher than the set exhaust pressure value 11 of the intermediate pressure cylinder, the proportional (P) action and the integral (I) action enable the low-pressure cylinder to close the steam inlet adjusting butterfly valve 5; when the exhaust pressure measured value of the exhaust pressure measuring point 9 of the intermediate pressure cylinder is lower than the exhaust pressure set value 11 of the intermediate pressure cylinder, the low pressure cylinder steam inlet adjusting butterfly valve 5 is opened under the action of the proportion (P) and the integral (I), so that the exhaust pressure measured value of the exhaust pressure measuring point 9 of the intermediate pressure cylinder meets the operation requirement.
When the automatic power generation control instruction changes, the function generator 14 directly carries out prediction adjustment on the low-pressure cylinder steam inlet adjusting butterfly valve 5, and the heat supply pressure is affected due to the fact that the low-pressure cylinder steam inlet adjusting butterfly valve of the heat supply cylinder switching unit is opened too fast and too much, so that the upper limit and the lower limit of an output value are set in the function generator 14 by combining the actual operation situation of the heat supply unit, the safety of the unit is ensured (the normal situation, the upper limit and the lower limit are recommended to be set at 5-25, the pressure on the steam supply side can fluctuate in the working process of being lower than 5, the power generation capacity of a steam turbine is increased when the working process is higher than 25, and the heat. For the cylinder block, the function generator 14 is set to 5 for the lowest steady-burning load (40% rated load) in the winter heating period and 25 for the highest achievable load (80% rated load). The middle section of the function is processed according to linearization. The specific parameters are shown in the following table:
table: function generator 14 parameter setting value table
Because the high-pressure cylinder steam inlet regulating valve 1 and the low-pressure cylinder steam inlet regulating butterfly valve 5 act simultaneously, the measured value of the steam exhaust pressure of the intermediate-pressure cylinder steam exhaust pressure measuring point 9 and the measured value of the pressure of the heat supply main pipe pressure measuring point 17 are influenced, the control of the measured value of the steam exhaust pressure of the intermediate-pressure cylinder steam exhaust pressure measuring point 9 is completed by the PI controller 15, and the control method is the same as the control method when the automatic power generation control instruction is stable. The pressure variation range of the pressure measuring point 17 of the heat supply main pipe is usually required to be maintained at 0.2-0.3MPa (suitable for a unit with a steam-driven circulating pump on the hot water supply side) or 0.03-0.05MPa (suitable for a unit with an electric circulating pump on the hot water supply side). When the pressure measurement value of the heat supply main pipe pressure measurement point 17 is too low, a large heat supply main pipe pressure adjusting butterfly valve 16 needs to be opened manually; when the pressure measurement value of the heat supply main pipe pressure measurement point 17 is too high, the pressure regulating butterfly valve 16 of the heat supply main pipe needs to be manually closed down to ensure the heat supply safety. The pressure regulating butterfly valve 16 of the heat supply main pipe is rarely operated when in normal operation, so manual control is adopted.
The control system can effectively improve the automatic power generation control performance of the cylinder heat supply cutting unit, and has the advantages that after the adjusting function of the low-pressure cylinder steam inlet adjusting butterfly valve 5 is added, when the automatic power generation control instruction of the cylinder heat supply cutting unit changes, the output power of the high-pressure cylinder of the steam turbine changes along with the change of the output power. The output power of the turbine intermediate pressure cylinder and the turbine low pressure cylinder can change along with the change of the output power, so that the high pressure cylinder, the intermediate pressure cylinder and the low pressure cylinder of the heat supply cylinder switching unit can effectively and quickly respond when the automatic power generation control command is increased, and the quick load response capability of the unit is improved.
To sum up, the control method can meet the requirements of quick and accurate response to the automatic power generation control command when the cylinder unit is switched to the heating mode. Meanwhile, the stability of medium discharge pressure and the stability of heat supply flow and pressure are maintained, and further guarantee is provided for economic and safe operation of a power plant.
Claims (1)
1. The quick response automatic power generation control system when the cylinder unit is cut in heat supply operation is characterized in that: the system comprises a high-pressure cylinder steam inlet regulating valve (1) arranged at the inlet of a high-pressure cylinder (2) of the steam turbine, a PID controller (13) connected with the high-pressure cylinder steam inlet regulating valve, a low-pressure cylinder steam inlet regulating butterfly valve (5) arranged on a low-pressure communicating pipe between a medium-pressure cylinder (4) and a low-pressure cylinder (6) of the steam turbine, a function generator (14) and a PI controller (15) connected with the low-pressure cylinder steam inlet regulating butterfly valve, a heat supply main pipe pressure regulating butterfly valve (16) and a heat supply main pipe pressure measuring point (17) which are arranged on a steam extraction pipeline of the medium-pressure cylinder (; two paths of input signals of the PID controller (13) are an automatic power generation control instruction signal (12) and a power generation actual load signal of an electric power sensor (10) arranged at the output end of the generator respectively; the input signal of the function generator (14) is an automatic power generation control command signal (12); two paths of input signals of the PI controller (15) are respectively an exhaust pressure measured value of an intermediate pressure cylinder exhaust pressure measuring point (9) on a low-pressure communicating pipe between a turbine intermediate pressure cylinder (4) and a turbine low-pressure cylinder (6) and a turbine intermediate pressure cylinder exhaust pressure set value (11).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255529A (en) * | 2020-03-19 | 2020-06-09 | 西安热工研究院有限公司 | Quick response automatic power generation control system and method for operation of heat supply cylinder switching unit |
| CN114165304A (en) * | 2021-08-25 | 2022-03-11 | 国家能源集团国源电力有限公司 | Heat supply unit power adjusting method and device and electronic equipment |
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2020
- 2020-03-19 CN CN202020348952.3U patent/CN211851929U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255529A (en) * | 2020-03-19 | 2020-06-09 | 西安热工研究院有限公司 | Quick response automatic power generation control system and method for operation of heat supply cylinder switching unit |
| CN111255529B (en) * | 2020-03-19 | 2024-02-02 | 西安热工研究院有限公司 | Rapid response automatic power generation control system and method during operation of heat supply cylinder cutting unit |
| CN114165304A (en) * | 2021-08-25 | 2022-03-11 | 国家能源集团国源电力有限公司 | Heat supply unit power adjusting method and device and electronic equipment |
| CN114165304B (en) * | 2021-08-25 | 2024-05-17 | 国家能源集团国源电力有限公司 | Power adjusting method and device of heat supply unit and electronic equipment |
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