CN109024509B - System for improving water head and increasing installed capacity of hydropower station and control method thereof - Google Patents

Abstract

The invention relates to the field of electric power energy, and discloses a system for improving a water head and increasing the installed capacity of a hydropower station and a control method thereof, which are suitable for newly building large, medium and small hydropower stations and expanding the hydropower stations. The system comprises a plurality of production lines, and each production line mainly comprises a water inlet pipeline, a pressurizing bin, a water outlet pipeline, an electric valve and a control device. The water flow enters the pressurizing bin through the water inlet pipeline, and is circularly and continuously discharged into the energy increasing warehouse through the water outlet pipeline after being pressurized, so that the purposes of increasing the water head and ensuring the power generation flow are achieved. The hydropower station can greatly increase the installed capacity and the generated energy by utilizing the increased water head. The invention has small investment and huge investment return; and the natural resources can be fully utilized, the ecological flow of the river is ensured, and the environmental protection and social benefits are remarkable.

Description

System for improving water head and increasing installed capacity of hydropower station and control method thereof

Technical Field

The invention relates to the field of electric power energy, in particular to a system for improving a water head and increasing the installed capacity of a hydropower station and a control method thereof.

Background

As a clean energy source, the price of electricity is low, and a large number of hydropower stations are built around the world.

It is well known that the installed size of a hydropower station is mainly determined by the water head and the flow rate of a river. Under the premise of keeping other conditions unchanged, if the water head is higher, the installed capacity of the hydropower station is larger; the larger the flow, the larger the installed capacity of the hydropower station (installed capacity calculation formula of hydropower station: installed capacity is gravity acceleration x flow x head x water turbine and generator efficiency).

According to conventional designs, after the dam is positioned, the head is determined, and the installed capacity of the hydropower station is difficult to increase.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provided are a system for increasing a water head and increasing installed capacity of a hydropower station and a control method thereof (hereinafter referred to as an IHC system). The invention is adopted by the owners of large, medium and small newly built hydropower stations (including pumped storage hydropower stations) or water transporting hydropower stations, effectively utilizes natural resources on the premise of not greatly increasing investment, greatly increases the installed capacity of the hydropower stations, obtains greater investment return, and provides more green electric power for the society.

In order to solve the problems, the technical scheme of the invention is as follows:

the process flow is shown in the attached figure 1 of the specification: "IHC System Process flow diagram".

One set of system is provided with 2 or more than 2 production lines, 1 water inlet pipeline is shared, and 1 surge shaft is arranged on the water inlet pipeline; each production line is provided with 2 pressurizing bins, 1 communicating pipeline and 1 water outlet pipeline; one set of system is provided with 1 energizing library.

The water inlet pipeline (or the water inlet tunnel) is made of concrete or steel structure and is connected with a reservoir (water source) of the hydropower station and the pressurizing bin. Water flow enters a water inlet pipeline of the IHC system from a water intake of the reservoir and then enters the pressurizing bin. The water intake of the water inlet pipeline is provided with a trash rack to prevent sundries from entering. And 1 electric valve (electric valve) is arranged at the water intake so as to facilitate system start and stop and equipment maintenance. The inlet pipe is provided with 1 flow transmitter (inlet flow speed transmitter). Between the water intake and the pressurizing bin, a surge tank (or surge well) can be arranged to reduce the influence of water hammer pressure on the IHC system and improve the operating condition of the IHC system.

One set of HC system sets up two or more than two production lines (production line 1, production line 2), and every production line comprises 2 pressure boost storehouses (pressure boost storehouse No. 1, pressure boost storehouse No. 2; pressure boost storehouse No. 3, 4), and the pressure boost storehouse is concrete or steel construction. 2 pressurizing bins of each production line are provided with 1 communicating pipeline (or communicating tunnel) for connection. One end of the pressurizing bin is connected with the water inlet pipeline, and the other end of the pressurizing bin is connected with the communicating pipeline. The communicating pipeline is a concrete or steel structure. An electric valve (a pressurizing bin isolating valve, which is shared by all production lines) is arranged on a water inlet pipeline between the pressurizing bins. Each pressurizing bin is provided with 1 electric valve (a water inlet valve of the pressurizing bin 1, a water inlet valve of the pressurizing bin 2, a water inlet valve of the pressurizing bin 3 and a water inlet valve of the pressurizing bin 4) on a water inlet pipeline, and each pressurizing bin is provided with 1 electric valve (a water outlet valve of the pressurizing bin 1, a water outlet valve of the pressurizing bin 2, a water outlet valve of the pressurizing bin 3 and a water outlet valve of the pressurizing bin 4) on a communicating pipeline. Each pressurizing bin is provided with a pressure transmitter (No. 1 pressurizing bin pressure transmitter, No. 2 pressurizing bin pressure transmitter, No. 3 pressurizing bin pressure transmitter, No. 4 pressurizing bin pressure transmitter). Every pressure boost storehouse sets up a relief valve (pressure boost storehouse relief valve No. 1, pressure boost storehouse relief valve No. 2, pressure boost storehouse relief valve No. 3, pressure boost storehouse relief valve No. 4), and every pressure boost storehouse sets up an exhaust-valve (pressure boost storehouse exhaust-valve No. 1, pressure boost storehouse exhaust-valve No. 2, pressure boost storehouse exhaust-valve No. 3, pressure boost storehouse exhaust-valve No. 4.

The water outlet pipeline (or the water outlet tunnel) is of a concrete or steel structure and is connected with the communicating pipeline; each production line is provided with 1 water outlet pipeline. The water outlet pipeline is connected with a pressure steel pipe of the energy increasing reservoir or the hydropower station. Each outlet pipe is provided with 1 flow transmitter (No. 1 line outlet flow transmitter, No. 2 line outlet flow transmitter).

The tail end of the water inlet pipeline is provided with 1 electric valve (ecological flow valve) to discharge tail water so as to meet the process flow conditions of the IHC system and ensure the ecological flow of rivers.

The local control PLC of the control device is connected with each electric valve, the pressure transmitter, the flow transmitter and the safety valve through instrument control cables. All electrically operated valves, have automatic and manual modes. The PLC is in communication connection with a central control room of the hydropower station.

Furthermore, the hydropower station can be provided with a plurality of IHC systems, the water head is improved, and meanwhile, the power generation flow is increased, so that the purpose of greatly increasing the installed capacity of the hydropower station is achieved.

Furthermore, the PLC programming of the control device is executed according to the unattended full-automatic operation mode of the IHC system. The PLC reads the information of the electric valve, the pressure transmitter, the flow transmitter and the safety valve; instructing the electrically operated valve to open or close; and instructing a certain pressurizing bin, a certain production line or the whole set of IHC system to stop running.

Further, the IHC system is started to flush water to each pressurizing bin. Firstly, 2 pressurizing bins (or more than 2 pressurizing bins) reaching high bin pressure are closed, a water inlet valve of each pressurizing bin is closed, a water outlet valve of each pressurizing bin is opened, pressurized water flows into a water outlet pipeline through a communicating pipeline, and flows into a pressure steel pipe of an energy-increasing reservoir or a hydropower station after reaching a design elevation; when the pressure in the pressurizing cabin is reduced to the low cabin pressure, the water outlet valve of the pressurizing cabin is closed, the water inlet valve of the pressurizing cabin is opened, and the pressurizing cabin is flushed continuously. 2 pressurizing bins (or more than 2 pressurizing bins) which reach high bin pressure subsequently are closed, water inlet valves of the pressurizing bins are closed, water outlet valves of the pressurizing bins are opened, pressurized water flows into a water outlet pipeline through a communicating pipeline, and flows into a pressure steel pipe of an energy-increasing reservoir or a hydropower station after reaching a design elevation; when the pressure in the pressurizing cabin is reduced to the low cabin pressure, the water outlet valve of the pressurizing cabin is closed, the water inlet valve of the pressurizing cabin is opened, and the pressurizing cabin is flushed continuously.

Furthermore, when the pressurizing bin with high bin pressure drains water, the pressurizing bin with low bin pressure flushes water; when the low-bin-pressure pressurizing bin discharges water after reaching the high bin pressure, the high-bin-pressure pressurizing bin discharges water after pressure is released. And sequentially circulating, and continuously operating the IHC system.

Furthermore, according to the requirements of the process flow, when each pressurizing bin close to the tail end of the water inlet pipeline discharges water and other pressurizing bins flush water, the control device PLC closes the isolation valve, opens the ecological flow valve, discharges tail water, and discharges the tail water into a river as the ecological flow of the river.

The invention has the following beneficial effects:

the invention is simple and feasible:

1. the invention only relates to a water inlet pipeline, a pressurizing bin, a water outlet pipeline and a control device, and the process flow is simple and clear.

2. The invention provides a wider selection range for arranging the main powerhouse of the hydropower station.

3. The equipment related by the invention can be completely independently produced by domestic manufacturers. Is not in conflict with the current technical standard in China.

4. And a construction unit does not need large-scale engineering equipment to build an IHC system, and the construction difficulty is small. Is not in conflict with the current technical standards.

5. The control method is simple, and the technology is mature and reliable. Is not in conflict with the current technical standards.

Second, the comprehensive comparison table of the traditional design and the invention

Description of the drawings: IHC system efficiency, adopts current water hammer pump efficiency.

Thirdly, economic benefits:

1. compared with the traditional design, the newly-built hydropower station can greatly increase the installed capacity and the generated energy.

2. Under the condition that local geographic conditions permit, the IHC system can be used for improving the water head of the hydropower station which is already put into operation, and the installed capacity and the generated energy can be greatly increased without additional large investment of hydropower station owners.

3. Besides the start and stop of the electric valve, the invention does not need a power supply. The invention is unattended and fully automatic operation. The operation and maintenance are simple and the cost is low.

4. Under the condition that geographic conditions permit (especially in mountain areas), the hydropower station can additionally build a large energy-increasing reservoir for storing water, and generates electricity at the peak time of electricity utilization so as to obtain peak-shaving electricity price.

5. In conclusion, the invention has high cost performance, huge investment return and obvious economic benefit.

Thirdly, environmental protection and social benefits:

1. hydropower stations are themselves green energy sources.

1) By adopting the invention, the ecological flow of the original river can be effectively ensured, and the influence of the construction of the hydropower station on the ecological environment is greatly reduced.

2) The invention has small floor area and can be built in the planning area of the hydropower station. The invention has simple main structure, no use in operation and maintenance, no pollutant generation and no harm to environment.

3) By adopting the invention, the natural resources can be fully utilized by newly building a hydropower station or modifying the existing hydropower station, and more clean energy sources can be provided for the society. The invention is beneficial to shutting down medium and small coal-fired power plants with serious pollution, reducing the development of new thermal power projects and avoiding the development of new hydropower station projects in places with fragile natural environments.

In conclusion, the invention is beneficial to environmental protection and has obvious environmental protection benefit.

2. The system and the equipment are simple, the safety protection is complete, and no harm is brought to operators.

3. The generated energy of the hydropower station is greatly increased, and the investment return of a hydropower station development unit is huge, so that a possible space is created for reducing the electricity price. The invention has obvious social benefit.

Drawings

The invention is further described with reference to the following drawings and detailed description.

FIG. 1 is a schematic view of the IHC system process flow of the present invention.

The code numbers in the figure illustrate:

1-a reservoir, 2-a water inlet pipeline, 3-a communication pipeline, 4-1 water outlet pipeline, 5-2 water outlet pipeline, 6-an ecological flow pipeline, 7-1 pressurizing bin, 8-2 pressurizing bin, 9-3 pressurizing bin, 10-4 pressurizing bin and 11-an energy increasing bin;

a-electric valve, b-electric check valve, c-flow transmitter, d-pressure transmitter, e-safety valve, f-emptying valve, g-water flow direction

Detailed Description

Basic setting: take an example in which two production lines are provided in one IHC system.

Description of the drawings: before the IHC system is put into full-automatic operation, an operator is required to check the communication state of a PLC and a central control room of a hydropower station according to the regulation of an operation manual after flushing water to the pressurizing cabin, check the working states of each electric valve, each flow transmitter, each pressure transmitter and each safety valve, operate an emptying valve and an ecological flow valve of the pressurizing cabin on site and discharge air in the IHC system.

1. After receiving a command of a central control room of the hydropower station, the IHC system starts to operate;

2. the water intake electric valve, the water inlet valve of each pressurizing bin and the isolating valve of each pressurizing bin are opened, the water outlet valve of each pressurizing bin is closed, and the ecological flow valve is closed; flushing water to each pressurizing bin;

3. when the pressure in the No. 1 pressurizing bin (No. 3 pressurizing bin) reaches the designed 'high bin pressure', the PLC commands: the water inlet valve of the No. 1 pressurizing bin (No. 3 pressurizing bin) is closed, and the water outlet valve of the No. 1 pressurizing bin (No. 3 pressurizing bin) is opened; pressurized water flow of the No. 1 pressurizing bin (No. 3 pressurizing bin) enters a water outlet pipeline through a communicating pipeline, and flows into a pressure steel pipe of an energy increasing reservoir or a hydropower station after reaching a design elevation;

4. when the pressure in the pressurization bin No. 1 (pressurization bin No. 3) is reduced to the designed low bin pressure [ at the moment, the pressure in the pressurization bin No. 2 (pressurization bin No. 4) reaches the designed high bin pressure ], the PLC instructs that: the water outlet valve of the No. 1 pressurizing bin (No. 3 pressurizing bin) is closed, the isolating valve of the pressurizing bin is closed, the water inlet valve of the No. 1 pressurizing bin (No. 3 pressurizing bin) is opened, and water is flushed to the No. 1 pressurizing bin (No. 3 pressurizing bin); the water inlet valve of the No. 2 pressurizing bin (No. 4 pressurizing bin) is closed, and the water outlet valve of the No. 2 pressurizing bin (No. 4 pressurizing bin) is opened; pressurized water flow of the No. 2 pressurizing bin (No. 4 pressurizing bin) enters a water outlet pipeline through a communicating pipeline, and flows into a pressure steel pipe of an energy increasing reservoir or a hydropower station after reaching a design elevation; opening an ecological flow valve, and discharging tail water;

5. when the pressure in the No. 2 pressurizing bin (No. 4 pressurizing bin) is reduced to the designed 'low bin pressure' (at the moment, the pressure in the No. 1 pressurizing bin (No. 3 pressurizing bin) reaches the designed 'high bin pressure'), a PLC (programmable logic controller) instructs that: closing a water outlet valve of the No. 2 pressurizing bin (No. 4 pressurizing bin), opening an isolating valve of the pressurizing bin, closing the ecological flow valve, opening a water inlet valve of the No. 2 pressurizing bin (No. 4 pressurizing bin), and flushing water to the No. 2 pressurizing bin (No. 4 pressurizing bin); the water inlet valve of the No. 1 pressurizing bin (No. 3 pressurizing bin) is closed, and the water outlet valve of the No. 1 pressurizing bin (No. 3 pressurizing bin) is opened; pressurized water flow of the No. 1 pressurizing bin (No. 3 pressurizing bin) enters a water outlet pipeline through a communicating pipeline, and flows into a pressure steel pipe of an energy increasing reservoir or a hydropower station after reaching a design elevation;

6. each production line is provided with 1 pressurizing bin for flushing water at the same time, and the other pressurizing bin discharges water flow with pressure and flows into the energizing bin through a water outlet pipeline.

7. And sequentially circulating, and continuously operating the IHC system.

8. If the pressure in a certain pressurizing bin exceeds the designed safe pressure, the safety valve of the pressurizing bin is automatically opened to ensure the safety of the pressurizing bin; the safety valve automatically returns to the seat after pressure relief.

9. If a certain electric valve is not opened or closed according to the PLC instruction, the PLC sends out a fault alarm and transmits an alarm signal or alarm information to the hydropower station central control room.

10. And if the water inlet flow or the water outlet flow is lower than the minimum design value or the minimum safety value, the PLC sends out a fault alarm and transmits an alarm signal or alarm information to a central control room of the hydropower station.

And 11, transmitting the water inflow data and the water outflow data to a central control room of the hydropower station by the PLC.

12.1 PLCs can operate multiple sets of IHC systems simultaneously.

The method comprises the following specific steps (PLC programming, two production lines are arranged in one IHC system as an example):

sa 1: an operator starts an 'automatic running' mode (an electric valve at a water intake is closed, water inlet valves of all the pressurizing bins are opened, isolating valves of the pressurizing bins are opened, water outlet valves of all the pressurizing bins are closed, and an ecological flow valve is closed), and the operation enters Sa 2;

sa 2: the IHC system is in a standby state;

sa 3: the PLC judges whether a water supply instruction of a central control room of the hydropower station is received: if yes, go to step Sa 4;

sa 4: the PLC instructs the electric valve of the water intake to open and enters Sa 5;

sa 5: the PLC judges whether a feedback signal of 'opening' of the electric valve at the water intake is received: if yes, entering Sa6, Sa7, Sa8 and Sa 9; if not, entering Sa 322;

sa 6: the No. 1 pressurizing bin enters a flushing state;

sa 7: the No. 2 pressurizing bin enters a flushing state;

sa 8: the No. 3 pressurizing bin enters a flushing state;

sa 9: the No. 4 pressurizing bin enters a flushing state;

sa 10: PLC distinguishes flushing state of No. 1 pressurizing cabin and No. 3 pressurizing cabin

1) PLC receives 1 number pressure boost storehouse "high storehouse pressure" and 3 numbers pressure boost storehouse "high storehouse pressure" signals: if yes, enter Sa 11;

or

2) PLC receives "high storehouse pressure" signal in 1 number pressure boost storehouse, does not receive "high storehouse pressure" signal in 3 numbers pressure boost storehouses: if yes, enter Sa11 and Sa 263;

or

3) PLC receives "high storehouse pressure" signal in pressure boost storehouse No. 3, does not receive "high storehouse pressure" signal in pressure boost storehouse No. 1: if yes, enter Sa11 and Sa 261;

sa 11: the PLC judges whether a water supply instruction of a central control room of the hydropower station disappears: if the information disappears, entering Sa 12; if not, entering Sa14 and/or Sa 15;

sa 12: the PLC instructs the electric valve of the water intake to close, and enters Sa 22;

sa 13: the PLC judges whether a feedback signal of closing the electric valve of the water intake is received: if so, jump back to Sa 2; if not, entering Sa 322;

sa 14: PLC judges whether the water outlet valve of the No. 2 pressurizing bin is closed: if yes, enter Sa 16;

sa 15: PLC judges whether the water outlet valve of the No. 4 pressurizing bin is closed or not: if yes, enter Sa 17;

sa 16: the PLC instructs the water inlet valve of the No. 1 pressurizing bin to be closed and enters Sa 18;

sa 17: the PLC instructs the water inlet valve of the No. 3 pressurizing bin to be closed and enters Sa 19;

sa 18: the PLC judges whether a feedback signal of closing the water inlet valve of the No. 1 pressurizing bin is received or not: if yes, enter Sa 20; if not, entering Sa 261;

sa 19: the PLC judges whether a feedback signal of closing the water inlet valve of the No. 3 pressurizing bin is received: if yes, enter Sa 21; if not, entering Sa 263;

sa 20: the PLC instructs the No. 1 pressurizing bin water outlet valve to be opened, and the water enters Sa 21;

sa 21: the PLC instructs the No. 3 pressurizing bin water outlet valve to be opened, and the water enters Sa 22;

sa 22: the PLC judges whether a feedback signal of opening of the water outlet valve of the No. 1 pressurizing bin is received: if yes, enter Sa 23; if not, entering Sa 261;

sa 23: the PLC judges whether a feedback signal of opening of the water outlet valve of the No. 3 pressurizing bin is received: if yes, enter Sa 23; if not, entering Sa 263;

sa 24: the PLC receives Sa22 and/or Sa23 and judges the drainage states of the No. 1 pressurizing bin and the No. 3 pressurizing bin

1) PLC receives 1 number pressure boost storehouse "low storehouse pressure" signal and 3 numbers pressure boost storehouse "low storehouse pressure" signals: if yes, enter Sa 34;

or

2) PLC receives 1 number pressure boost storehouse "low storehouse pressure" signal, does not receive 3 numbers pressure boost storehouse "low storehouse pressure" signals: if yes, enter Sa34 and Sa 263;

or

3) PLC receives No. 3 pressure boost storehouse "low storehouse pressure" signals, does not receive 1 pressure boost storehouse "low storehouse pressure" signals: if yes, enter Sa34 and Sa 261;

sa 25: the No. 1 pressurized bin and the No. 3 pressurized bin are drained, and the water enters Sa26 and/or Sa27

Sa 26: the PLC instructs the water outlet valve of the No. 1 pressurizing bin to be closed, and enters Sa28

Sa 27: the PLC instructs the water outlet valve of the No. 3 pressurizing bin to be closed, and enters Sa29

Sa 28: the PLC judges whether a feedback signal of closing of the No. 1 pressurizing bin water outlet valve is received: if yes, enter Sa 30; if not, entering Sa 301;

sa 29: the PLC judges whether a feedback signal of closing of the water outlet valve of the No. 3 pressurizing bin is received: if yes, enter Sa 30; if not, entering Sa 302;

sa 30: the PLC receives Sa28 and/or Sa29, and the PLC judges the flushing state of the No. 2 pressurizing bin and the No. 4 pressurizing bin

1) PLC receives the signal of 2 number pressure boost storehouses "high storehouse pressure" and the signal of 4 number pressure boost storehouses "high storehouse pressure": if so, the method enters Sa31

Or

2) PLC receives No. 2 pressure boost storehouse "high storehouse pressure" signals, does not receive No. 4 pressure boost storehouse "high storehouse pressure" signals: if yes, enter Sa31 and Sa 264;

or

3) PLC receives No. 4 pressure boost storehouse "high storehouse pressure" signals, does not receive No. 2 pressure boost storehouse "high storehouse pressure" signals: if yes, enter Sa31 and Sa 262;

sa 31: the No. 1 pressurizing bin and the No. 3 pressurizing bin are ready for flushing and enter Sa 32;

sa 32: the PLC instructs the isolation valve of the pressurizing bin to be closed and enters Sa 33;

sa 33: the PLC judges whether a feedback signal of closing the isolating valve of the pressurizing bin is received: if yes, entering Sa34 and/or Sa 35; if not, entering Sa 322;

sa 34: the PLC instructs the water inlet valve of the No. 1 pressurizing bin to be opened and enters Sa 36;

sa 35: the PLC instructs the water inlet valve of the No. 3 pressurizing bin to be opened and enters Sa 37;

sa 36: the PLC judges whether a feedback signal of opening of the water inlet valve of the No. 1 pressurizing bin is received: if yes, enter Sa 38; if not, entering Sa 261;

sa 37: the PLC judges whether a feedback signal of opening of the water inlet valve of the No. 3 pressurizing bin is received: if yes, enter Sa 39; if not, entering Sa 263;

sa 38: jump back to Sa 6;

sa 39: jump back to Sa 8;

sa 40: PLC distinguishes flushing state of No. 2 pressurizing cabin and No. 4 pressurizing cabin

1) PLC receives the signal of 2 number pressure boost storehouses "high storehouse pressure" and the signal of 4 number pressure boost storehouses "high storehouse pressure": if yes, enter Sa 41;

or

2) PLC receives No. 2 pressure boost storehouse "high storehouse pressure" signals, does not receive No. 4 pressure boost storehouse "high storehouse pressure" signals: if yes, enter Sa41 and Sa 264;

or

3) PLC receives No. 4 pressure boost storehouse "high storehouse pressure" signals, does not receive No. 4 pressure boost storehouse "high storehouse pressure" signals: if yes, enter Sa41 and Sa 262;

sa 41: the PLC judges whether a water supply instruction of a central control room of the hydropower station disappears: if the information disappears, entering Sa 42; if not, entering Sa 44;

sa 42: the PLC instructs the electric valve of the water intake to close, and enters Sa 43;

sa 43: the PLC judges whether a feedback signal of closing the electric valve of the water intake is received: if so, jump back to Sa 2; if not, entering Sa 322;

sa 44: PLC judges whether the signal of 'high cabin pressure' of No. 1 pressurizing cabin and/or the signal of 'high cabin pressure' of No. 3 pressurizing cabin is received: if so, waiting; if not, entering Sa45 and/or Sa 46;

sa 45: PLC judges whether the No. 1 pressurizing bin water outlet valve is closed or not: if yes, enter Sa 47;

sa 46: PLC judges whether the No. 3 pressurizing bin water outlet valve is closed or not: if yes, enter Sa 48;

sa 47: the PLC instructs the water inlet valve of the No. 2 pressurizing bin to be closed, and the water enters Sa 49;

sa 48: the PLC instructs the water inlet valve of the No. 4 pressurizing bin to be closed and enters Sa 50;

sa 49: the PLC judges whether a feedback signal of closing the water inlet valve of the No. 2 pressurizing bin is received: if yes, enter Sa 51; if not, entering Sa 262;

sa 50: the PLC judges whether a feedback signal of closing the water inlet valve of the No. 4 pressurizing bin is received: if yes, enter Sa 52; if not, entering Sa 264;

sa 51: the PLC instructs the No. 2 pressurizing bin water outlet valve to be opened, and the water enters Sa 53;

sa 52: the PLC instructs the No. 4 pressurizing bin water outlet valve to be opened, and the water enters Sa 54;

sa 53: the PLC judges whether a feedback signal of opening of the water outlet valve of the No. 2 pressurizing bin is received: if yes, enter Sa 55; if not, entering Sa 262;

sa 54: the PLC judges whether a feedback signal of opening of the No. 4 pressurizing bin water outlet valve is received: if yes, enter Sa 55; if not, entering Sa 264;

sa 55: the PLC receives Sa53 and/or Sa54, judges whether receives the signal of closing the isolation valve: if yes, enter Sa 56; if not, enter Sa 322;

sa 56: the PLC instructs the ecological flow valve to be opened and enters Sa 57;

sa 57: the PLC judges whether a feedback signal of 'opening' of the ecological flow valve is received: if yes, enter Sa 58; if not, entering Sa 322;

sa 58: PLC judges the drainage state of No. 2 pressurizing bin and No. 4 pressurizing bin

1) PLC receives the 'low bin pressure' signal of No. 2 pressure boost storehouse and the 'low bin pressure' signal of No. 44 pressure boost storehouse: if yes, enter Sa 69;

or

2) PLC receives No. 2 pressure boost storehouse "low storehouse pressure" signals, does not receive No. 4 pressure boost storehouse "low storehouse pressure" signals: if yes, enter Sa69 and Sa 264;

or

3) PLC receives No. 4 pressure boost storehouse "low storehouse pressure" signals, does not receive No. 2 pressure boost storehouse "low storehouse pressure" signals: if yes, enter Sa69 and Sa 262;

sa 59: after the drainage of the No. 2 pressurizing bin and the No. 4 pressurizing bin is finished, the water enters Sa60 and/or Sa 61;

sa 60: the PLC instructs the No. 2 pressurizing bin water outlet valve to be closed, and enters Sa 62;

sa 61: the PLC instructs the No. 4 pressurizing bin water outlet valve to be closed, and the water enters Sa 63;

sa 62: judging whether the PLC receives a feedback signal of closing the water outlet valve of the No. 2 pressurizing bin: if yes, enter Sa 64; if not, entering Sa 301;

sa 63: judging whether the PLC receives a feedback signal of closing the water outlet valve of the No. 4 pressurizing bin: if yes, enter Sa 64; if not, entering Sa 302;

sa 64: the PLC receives Sa62 and/or Sa63 and judges the flushing state of the No. 1 pressurizing bin and the No. 3 pressurizing bin

1) PLC receives 1 number pressure boost storehouse "high storehouse pressure" signal and 3 numbers pressure boost storehouse "high storehouse pressure" signal: if yes, enter Sa 65;

or

2) PLC receives 1 number pressure boost storehouse "high storehouse pressure" signal, does not receive 3 numbers pressure boost storehouse "high storehouse pressure" signal: if yes, enter Sa65 and Sa 263;

or

3) PLC receives No. 3 pressure boost storehouse "high storehouse pressure" signals, does not receive 1 pressure boost storehouse "high storehouse pressure" signals: if yes, enter Sa65 and Sa 261;

sa 65: the No. 2 pressurizing bin and the No. 4 pressurizing bin are ready for flushing, and enter Sa 66;

sa 66: the PLC instructs the ecological flow valve to be closed, and enters Sa 67;

sa 67: the PLC judges whether a feedback signal of 'closing' of the ecological flow valve is received: if yes, enter Sa 68; if not, entering Sa 322;

sa 68: the PLC instructs the pressure boost bin isolation valve to be opened, and then the pressure boost bin enters Sa 69;

sa 69: the PLC judges whether a feedback signal of opening of the isolation valve of the pressurizing bin is received: if yes, entering Sa70 and/or Sa 71; if not, entering Sa 322;

sa 70: the PLC instructs the water inlet valve of the No. 2 pressurizing bin to be opened and enters Sa 72;

sa 71: the PLC instructs the water inlet valve of the No. 4 pressurizing bin to be opened at the same time, and the water enters Sa 73;

sa 72: judging whether the PLC receives a feedback signal of opening of the water inlet valve of the No. 2 pressurizing bin: if yes, enter Sa 74; if not, entering Sa 262;

sa 73: judging whether the PLC receives a feedback signal of opening of the water inlet valve of the No. 4 pressurizing bin: if yes, enter Sa 75; if not, entering Sa 264;

sa 74: jump back to Sa 7;

sa 75: jump back to Sa 9;

sa 201: the inflow is lower than the minimum design flow, and enters Sa 321;

sa 202: the inflow is lower than the minimum safe flow, and enters Sa 322;

sa 203: 2 pressurizing bins operate simultaneously, the effluent flow of the No. 1 line is lower than the minimum design flow, and the effluent enters the Sa 321;

sa 204: only 1 pressurizing bin operates, the effluent flow of the No. 1 line is lower than the minimum design flow, and the effluent enters the Sa 321;

sa 205: 2 pressurizing bins operate simultaneously, the effluent flow of the No. 2 line is lower than the minimum design flow, and the effluent enters the Sa 321;

sa 206: only 1 pressurizing bin operates, the water outlet flow of the No. 2 line is lower than the minimum design flow, and the water enters the Sa 321;

sa 207: 2 pressurizing bins operate simultaneously, the water outlet flow of the No. 1 line is lower than the minimum safe flow, and the No. 1 line enters the Sa 301;

sa 208: only 1 pressurizing bin operates, the water outlet flow of the No. 1 line is lower than the minimum safe flow, and the No. 1 line enters the Sa 301;

sa 209: 2, the pressurizing bins operate simultaneously, the water outlet flow of the No. 2 line is lower than the minimum safe flow, and the No. 2 line enters the Sa 302;

sa 210: only 1 pressurizing bin operates, the water outlet flow of the No. 2 line is lower than the minimum safe flow, and the system enters the Sa 302;

sa 251: after the No. 1 safety valve operates, whether the valve returns to the seat or not enters the Sa 261;

sa 252: after the No. 2 safety valve operates, whether the valve returns to the seat or not enters Sa 262;

sa 253: after the No. 3 safety valve operates, whether the valve returns to the seat or not enters Sa 263;

sa 254: after the No. 4 safety valve operates, whether the valve returns to the seat or not enters Sa 264;

sa 261: stopping the operation of the No. 1 pressurizing bin; entering Sa 321;

sa 262: stopping the operation of the No. 2 pressurizing bin; entering Sa 321;

sa 263: stopping the operation of the No. 3 pressurizing bin; entering Sa 321;

sa 264: stopping the operation of the No. 4 pressurizing bin; entering Sa 321;

sa 271: no. 1 pressure boost storehouse water inlet valve and No. 2 pressure boost storehouse water inlet valve can not "close": if yes, entering Sa 301;

sa 272: no. 3 pressure boost storehouse water intaking valve and No. 4 pressure boost storehouse water intaking valve can not "close": if yes, entering Sa 302;

sa 273: neither the No. 1 pressurizing bin water inlet valve nor the No. 2 pressurizing bin water inlet valve can be opened: if yes, entering Sa 301;

sa 274: neither the No. 3 pressurizing bin water inlet valve nor the No. 4 pressurizing bin water inlet valve can be opened: if yes, entering Sa 302;

sa 281: stopping the operation of the No. 1 pressurizing bin and the No. 2 pressurizing bin, and entering Sa 301;

sa 282: stopping the operation of the No. 3 pressurizing bin and the No. 4 pressurizing bin, and entering Sa 302;

sa 301: stopping the operation of the No. 1 production line; entering Sa 321;

sa 302: stopping the production line No. 2; entering Sa 321;

sa 311: the IHC system receives a power supply loss signal and enters Sa 322;

sa 312: stopping the operation of the No. 1 production line and the No. 2 production line, and entering Sa 322;

sa 312: the effluent flow of the No. 1 production line and the effluent flow of the No. 2 production line are both lower than the minimum design flow, and the effluent flow enters the Sa 322;

sa 321: the PLC sends out an A-level fault alarm signal and displays fault information; entering Sa 331;

sa 322: the IHC system stops running; the PLC sends out a B-level fault alarm signal to display fault information; entering Sa 332;

sa 331: the PLC transmits an A-level fault alarm signal to a hydropower station central control room;

sa 332: the PLC transmits a B-level fault alarm signal and fault information to a hydropower station central control room;

sa 341: the PLC transmits water inflow data to a hydropower station central control room;

sa 351: the PLC transmits No. 1 line water flow data to a hydropower station central control room;

sa 361: the PLC transmits No. 2 line water flow data to a hydropower station central control room;

alarm setup and disposal principles

The alarm setting of the system for improving the water head and increasing the installed capacity of the hydropower station and the control method thereof is divided into A-level alarm and B-level alarm.

The A-level alarm (Sa331) is a non-critical fault. And the PLC operation screen displays the fault position and fault information. A class a alarm does not cause the IHC to stop running for the entire system. The PLC does not need to transmit the specific fault information details of each A-level alarm to a hydropower station central control room; however, when a class A alarm fault occurs in the equipment in the IHC system, the PLC needs to transmit a class A alarm signal to the central control room of the hydropower station once.

A class B alarm (Sa332) refers to a critical failure that will cause the IHC overall system to stop functioning. The PLC operation screen displays fault positions and fault information; the PLC must send each 'B-level fault alarm' signal and its fault information to the central control room of the water power station.

No matter the A-level alarm or the B-level alarm occurs, the central control room of the hydropower station needs to send inspection personnel to the site to check, confirm and process faults according to the regulations of an operation manual.

The foregoing describes the general principles and features of the present invention and, together with the general principles of the invention, further modifications and improvements thereto, may be made without departing from the spirit and scope of the invention as set forth in the appended claims.

Claims (4)

1. A control method for improving a water head and increasing the installed capacity of a hydropower station system is characterized in that a set of system is provided with 2 production lines, 1 water inlet pipeline is shared, and 1 surge shaft is arranged on the water inlet pipeline; the water inlet pipeline is connected with a reservoir of the hydropower station and is provided with 1 water intake electric valve; each production line is provided with 2 pressurizing bins, and the 2 pressurizing bins of each production line are provided with 1 communicating pipeline for connection; one end of the pressurizing bin is connected with the water inlet pipeline, and the other end of the pressurizing bin is connected with the communicating pipeline; the water outlet pipeline is connected with the communicating pipeline; each production line is provided with 1 water outlet pipeline which is connected with an energy increasing warehouse; each pressurizing bin is arranged on a water inlet pipeline and is provided with 1 pressurizing bin water inlet electric valve; each pressurizing bin is arranged on the communicating pipeline and is provided with 1 pressurizing bin water outlet electric valve; an electric isolating valve of the pressurizing bin is arranged on a water inlet pipeline between the pressurizing bins; 1 ecological flow electric valve is arranged at the tail end of the water inlet pipeline; the method is characterized in that after a hydropower station central control room instruction is received, an electric valve at a water intake, an electric valve for water inlet of each pressurizing bin and an electric isolation valve of each pressurizing bin are opened, an electric valve for water outlet of each pressurizing bin is closed, and an electric valve for ecological flow is closed; flushing water to each pressurizing bin; when the pressure in the No. 1 pressurizing bin reaches the designed 'high bin pressure', the PLC commands: the water inlet electric valve of the No. 1 pressurizing bin is closed, and the water outlet electric valve of the No. 1 pressurizing bin is opened; pressurized water flow of the No. 1 pressurizing bin enters a water outlet pipeline through a communicating pipeline and flows into an energizing bin after reaching a design elevation; when the pressure in the No. 1 pressurizing cabin is reduced to the designed 'low cabin pressure', the pressure in the No. 2 pressurizing cabin reaches the designed 'high cabin pressure', and a PLC (programmable logic controller) instructs: the water outlet electric valve of the No. 1 pressurizing bin is closed, the electric isolating valve of the No. 1 pressurizing bin is closed, the water inlet electric valve of the No. 1 pressurizing bin is opened, and the No. 1 pressurizing bin is flushed with water; the No. 2 pressurizing bin water inlet electric valve is closed, and the No. 2 pressurizing bin water outlet electric valve is opened; pressurized water flow of the No. 2 pressurizing bin enters a water outlet pipeline through a communicating pipeline and flows into the energizing bin after reaching a design elevation; opening an ecological flow electric valve, and discharging tail water; when the pressure in No. 2 pressure boost storehouse reduces to its "low storehouse of design and presses", the pressure in No. 1 pressure boost storehouse has reached its "high storehouse of design and presses", the PLC instruction: the water outlet electric valve of the No. 2 pressurizing bin is closed, the electric isolating valve of the pressurizing bin is opened, the ecological flow electric valve is closed, the water inlet electric valve of the No. 2 pressurizing bin is opened, and the No. 2 pressurizing bin is flushed with water; the water inlet electric valve of the No. 1 pressurizing bin is closed, and the water outlet electric valve of the No. 1 pressurizing bin is opened; pressurized water flow of the No. 1 pressurizing bin enters a water outlet pipeline through a communicating pipeline and flows into an energizing bin after reaching a design elevation; and circulating in sequence, and continuously working the system.

2. The control method of a system for increasing the installed capacity of a hydropower station by increasing the water head as claimed in claim 1, wherein 1 flow transmitter is arranged in each water inlet pipeline, and 1 flow transmitter is arranged in each water outlet pipeline; each pressurizing bin is provided with 1 pressure transmitter; each pressurizing bin is provided with 1 safety valve and 1 emptying valve.

3. The control method for increasing the installed capacity of the hydropower station according to the water head as claimed in claim 1 or 2, wherein 1 control device PLC is arranged in one system; the control device PLC is connected with all the electric valves, the flow transmitter, the pressure transmitter and the safety valve; and the control device PLC is in communication connection with the hydropower station central control room.

4. A control method for a system for increasing the installed capacity of a hydroelectric power station by increasing the head of water according to claim 1 or 2, characterized in that the system is unattended and automatically operated; the control device PLC starts a system to supply water to the hydropower station according to a water supply instruction of a control room in the hydropower station; when the water supply instruction of the central control room of the hydropower station disappears, the system enters a standby state.

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