CN220955901U - Multi-nozzle hydraulic linkage speed regulator - Google Patents
Multi-nozzle hydraulic linkage speed regulator Download PDFInfo
- Publication number
- CN220955901U CN220955901U CN202322211281.2U CN202322211281U CN220955901U CN 220955901 U CN220955901 U CN 220955901U CN 202322211281 U CN202322211281 U CN 202322211281U CN 220955901 U CN220955901 U CN 220955901U
- Authority
- CN
- China
- Prior art keywords
- valve
- module
- port
- nozzle
- direction valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007921 spray Substances 0.000 claims abstract description 21
- 230000001502 supplementing effect Effects 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 27
- 238000012544 monitoring process Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000004092 self-diagnosis Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 101001005165 Bos taurus Lens fiber membrane intrinsic protein Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model provides a multi-nozzle hydraulic linkage speed regulator, which comprises a mechanical overspeed protection module, an emergency shutdown module, a direction adjustment module, a hydraulic station module, a needle module and a pressure capacity module, wherein the mechanical overspeed protection module is electrically connected with the emergency shutdown module, the direction adjustment module and the hydraulic station module respectively; the emergency stop module is respectively and electrically connected with the direction adjusting module and the spray needle module; the direction adjusting module is respectively and electrically connected with the hydraulic station module, the spray needle module and the pressure volume module, and comprises a plurality of direction adjusting units which are arranged in parallel; the spray needle module is electrically connected with the pressure-holding module and the hydraulic station module, the spray needle module comprises a plurality of spray nozzle units which are arranged in parallel, and the spray nozzle units are arranged in one-to-one correspondence with the whole direction units. The utility model is helpful for improving the load adjusting efficiency of the speed regulator.
Description
Technical Field
The utility model relates to the technical field of hydropower station nozzle control, in particular to a multi-nozzle hydraulic linkage speed regulator.
Background
The water turbine speed regulator is used as an important component of a water turbine, is one of very important auxiliary control equipment of the water turbine generator set, and the running quality of the water turbine speed regulator directly determines the safe and stable running of the water turbine set, and is a key part for realizing the regulation of the water turbine, so that the normal and stable running of a hydropower station is ensured.
The Chinese patent with publication number CN214424622U discloses an impact type speed regulator, which comprises a stop valve, a nozzle electromagnetic valve, a hydraulic lock, a nozzle servomotor, a joint, a nozzle feedback potentiometer, a deflector action electromagnetic valve, a hydraulic reversing valve and a deflector servomotor, wherein the nozzle electromagnetic valve comprises a nozzle startup electromagnetic valve and a nozzle shutdown electromagnetic valve, the proposal adopts a hydraulic lock for sealing, adopts a digital valve hydraulic follow-up system, and does not need feedback manually, thereby eliminating dead zones caused by levers, improving the precision of a speed regulating system, but the starting mode of a single nozzle easily causes the single nozzle operation mode of a hydroelectric generating set, and can not meet the requirements of rapid and stable load regulation during the heavy load operation.
Disclosure of utility model
In view of this, the present utility model provides a multi-nozzle hydraulic linkage type speed regulator, in which the load adjustment of each nozzle unit is independently completed by adjusting the nozzle units corresponding to the direction adjusting units through the direction adjusting units, so as to improve the load adjustment efficiency of the speed regulator under each load state.
The utility model provides a multi-nozzle hydraulic linkage speed regulator, which comprises a mechanical overspeed protection module, an emergency stop module, a direction adjusting module, a hydraulic station module, a spray needle module and a pressure capacity module, wherein,
The mechanical overspeed protection module is respectively and electrically connected with the emergency stop module, the direction adjusting module and the hydraulic station module;
The emergency stop module is respectively and electrically connected with the direction adjusting module and the spray needle module;
The direction adjusting module is respectively and electrically connected with the hydraulic station module, the spray needle module and the pressure volume module, and comprises a plurality of direction adjusting units which are arranged in parallel;
The spray needle module is electrically connected with the pressure-holding module and the hydraulic station module, the spray needle module comprises a plurality of spray nozzle units which are arranged in parallel, and the spray nozzle units are arranged in one-to-one correspondence with the whole direction units.
On the basis of the above technical scheme, preferably, the emergency stop module comprises a first electromagnetic valve, a first direction valve, a second direction valve and a third direction valve, wherein a first end of the first electromagnetic valve is connected with an input end of the second direction valve and the mechanical overspeed protection module respectively, a second end of the first electromagnetic valve is connected with an input end of the first direction valve, a third end of the first electromagnetic valve is connected with a T port of the first direction valve and a T port of the third direction valve respectively, P ports of the first direction valve, the second direction valve and the third direction valve are connected with the whole direction module respectively, a B port of the first direction valve is connected with the whole direction module, and a B port of the second direction valve is connected with a connecting point.
On the basis of the above technical scheme, preferably, the direction adjusting unit comprises a second electromagnetic valve, a fourth direction valve and a fifth direction valve, a port B of the fourth direction valve is connected with the mechanical overspeed protection module, a port T of the fourth direction valve and a port T of the fifth direction valve are both connected with adjacent direction adjusting units, a port P of the fourth direction valve is connected with a port B of the fifth direction valve, a port P of the fifth direction valve is connected with the needle module, a first end of the second electromagnetic valve is connected with the needle module, a second end of the second electromagnetic valve is connected with an input end of the fifth direction valve, a third end of the second electromagnetic valve is connected with the direction adjusting module, and a fourth end of the second electromagnetic valve is connected with a coil end of the fifth direction valve.
Still further preferably, the nozzle unit includes a unidirectional throttle valve, a sixth directional valve, a seventh directional valve, and a proportional valve, wherein an input end of the unidirectional throttle valve is connected with the mechanical overspeed protection module, an a port of the unidirectional throttle valve is connected with a B port of the sixth directional valve, a B port of the unidirectional throttle valve is connected with a B port of the seventh directional valve, a T port of the sixth directional valve is connected with the alignment module, a T port of the seventh directional valve is connected with the hydraulic station module, a first end of the proportional valve is connected with a P port of the seventh directional valve, a second end and a fourth end of the proportional valve are connected with adjacent nozzle units, and a third end of the proportional valve is connected with a P port of the sixth directional valve.
Still further preferably, the hydraulic station module includes an oil filter, a first check valve, a stop valve, a combination valve and an electric unloading valve, an a port of the combination valve sequentially passes through the oil filter, the first check valve and the stop valve to be connected with the pressure capacity module, an a port of the combination valve is also connected with the mechanical overspeed protection module, a B port of the combination valve is respectively connected with the whole direction module, the pressure capacity module and an input end of the combination valve, and an input end of the combination valve is respectively connected with a first end and a second end of the electric unloading valve.
Still further preferably, the pressure-containing module includes a pressure container, a first air safety valve and an automatic air supplementing device, a first end of the pressure container is respectively connected with the direction adjusting module, the hydraulic station module and the needle module, a second end of the pressure container is connected with the automatic air supplementing device through a diaphragm valve, and a third end of the pressure container is connected with the first air safety valve.
Still further preferably, the automatic air supplementing device comprises a second air safety valve, a second one-way valve and a two-position three-way ball valve, one end of the diaphragm valve is respectively connected with the input end of the first air safety valve, one end of the second one-way valve and the first end and the third end of the two-position three-way ball valve, and the other end of the second one-way valve is connected with the second end of the two-position three-way ball valve.
Still more preferably, the hydraulic station module and the pressure-containing module are both connected to the needle module through a duplex oil filter.
Compared with the prior art, the multi-nozzle hydraulic linkage speed regulator has the following beneficial effects:
(1) The load adjustment of each nozzle unit is independently completed by adjusting the nozzle units which are arranged corresponding to the direction adjusting units through the direction adjusting units, so that the load adjustment efficiency of the speed regulator under each load state is improved;
(2) The working states of a single nozzle, a double nozzle, a plurality of nozzles and the like are automatically switched in the working process of the speed regulator, and the problems of load fluctuation and vibration of the hydroelectric generating set in the switching process are reduced in a mode that the nozzle units are independently switched by the integral unit;
(3) The starting-up process adopts a symmetrical multi-nozzle starting-up mode so as to slow down vibration on the hydroelectric generating set in the starting-up process, and meanwhile, the frequency rising speed is faster, so that the starting-up time can be effectively shortened.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a multi-nozzle hydraulic linkage governor provided by the present utility model;
FIG. 2 is a specific piping diagram of an emergency shutdown module provided by the present utility model;
FIG. 3 is a specific piping diagram of the direction-adjusting module provided by the utility model;
FIG. 4 is a specific piping diagram of the hydraulic station module provided by the present utility model;
FIG. 5 is a schematic diagram of a needle module according to the present utility model;
FIG. 6 is a schematic diagram of a pressure vessel module according to the present utility model;
FIG. 7 is a graph showing the output of each nozzle unit as the load of the governor provided by the present utility model increases;
Fig. 8 is a graph showing the output of each nozzle unit when the load of the governor provided by the present utility model is reduced.
Reference numerals illustrate: 1. a mechanical overspeed protection module; 2. an emergency shutdown module; 3. a direction adjusting module; 4. a hydraulic station module; 5. a needle module; 6. and the pressure-holding module.
Detailed Description
The following description of the embodiments of the present utility model will clearly and fully describe the technical aspects of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.
The utility model discloses a multi-nozzle hydraulic linkage type speed regulator, referring to fig. 1, comprising a mechanical overspeed protection module 1, an emergency stop module 2, a direction adjustment module 3, a hydraulic station module 4, a spray needle module 5 and a pressure containment module 6, wherein,
The mechanical overspeed protection module 1 is respectively and electrically connected with the emergency stop module 2, the direction adjustment module 3 and the hydraulic station module 4, wherein the mechanical overspeed protection module 1 can be a GX-11 mechanical hydraulic overspeed protection device.
The emergency stop module 2 is electrically connected with the direction adjustment module 3 and the needle module 5 respectively, as shown in fig. 2, the electromagnetic valve MEA70 corresponds to a first electromagnetic valve, the direction valve MEX70AA003 corresponds to a first direction valve, the direction valve MEX70AA004 corresponds to a second direction valve, and the direction valve MEX70AA005 corresponds to a third direction valve.
The emergency stop module 2 comprises a first electromagnetic valve, a first direction valve, a second direction valve and a third direction valve, wherein the first end of the first electromagnetic valve is connected with the input end of the second direction valve and the mechanical overspeed protection module 1 respectively, the second end of the first electromagnetic valve is connected with the input end of the first direction valve, the third end of the first electromagnetic valve is connected with the T port of the first direction valve and the T port of the third direction valve respectively, the P ports of the first direction valve, the second direction valve and the third direction valve are all connected with the whole direction module 3, the B port of the first direction valve is connected with the whole direction module 3, and the B port of the second direction valve is connected with a connecting point.
The direction-adjusting module 3 is respectively and electrically connected with the hydraulic station module 4, the spray needle module 5 and the pressure capacity module 6, and the direction-adjusting module 3 comprises a plurality of direction-adjusting units which are arranged in parallel.
The whole unit that is connected with the mechanical overspeed protection module 1 including second solenoid valve, fourth direction valve and fifth direction valve, the mouth of B of fourth direction valve, the mouth of T of fourth direction valve and fifth direction valve all is connected with adjacent whole unit that is connected, the mouth of P of fourth direction valve is connected with the mouth of B of fifth direction valve, the mouth of P of fifth direction valve is connected with needle module 5, the first end of second solenoid valve is connected with needle module 5, the second end of second solenoid valve is connected with the input of fifth direction valve, the third end of second solenoid valve is connected with whole module 3, the fourth end of second solenoid valve is connected with the coil end of fifth direction valve.
For example, referring to fig. 3, the detailed description of the specific pipeline structure of the direction module 3 is provided below, and the direction module 3 includes a direction valve MEX35 AA001, a direction valve MEX35 AA002, a direction valve MEX35AA003, a direction valve MEX30 AA001, a direction valve MEX30AA002, a direction valve MEX30AA003, and three solenoid valves NG6, wherein the solenoid valve NG6 corresponds to the second solenoid valve, the solenoid valve MEX35 AA001 corresponds to the fourth direction valve, and the solenoid valve MEX30 AA001 corresponds to the fifth direction valve.
The one-way throttle valve MEX30 AA701 is connected to the B port of the direction valve MEX35AA001, the input port of the direction valve MEX35AA001 is connected to the connection point MZ3, the T port of the direction valve MEX35AA001 is connected to the direction valve MEX35 AA002, the direction valve MEX35AA003, the direction valve MEX30AA001, the direction valve MEX30AA002 and the T port of the direction valve MEX30AA003, the P port of the direction valve MEX35AA001 is connected to the B port of the direction valve MEX30AA001, the a port of the direction valve MEX35AA001 is connected to the air, the P port of the direction valve MEX30AA001, the P port of the direction valve MEX30AA002 and the P port of the direction valve MEX30AA003 are connected to the connection point MP21, the input port of the direction valve MEX30AA002 and the input port of the direction valve MEX30AA003 are connected to the electromagnetic valve 6, the one-way valve MEX30AA002 is connected to the B port of the direction valve MEX35AA003, and the P port of the one-way valve MEX 003 AA002 is connected to the P port of the direction valve B35 AA003 AA 2.
In this embodiment, the hydraulic station module 4 includes an oil filter, a first check valve, a stop valve, a combination valve and an electric unloading valve, the port a of the combination valve is connected with the pressure-containing module sequentially through the oil filter, the first check valve and the stop valve, the port a of the combination valve is also connected with the mechanical overspeed protection module 1, the port B of the combination valve is connected with the input ends of the whole direction module 3, the pressure-containing module 6 and the combination valve respectively, and the input end of the combination valve is connected with the first end and the second end of the electric unloading valve respectively. As shown in fig. 4, the oil filter MEX11 AT001 corresponds to an oil filter, the check valve MEX11 AA701 corresponds to a first check valve, the shutoff valve MEX11 AA501 corresponds to a shutoff valve, the combination valve MEX11 AA301 corresponds to a combination valve, the electrical unloading valve MEX11 AA001 corresponds to an electrical unloading valve, and the hydraulic station module 4 further includes an oil filter MEX12 AT001, a check valve MEX12AA701, a shutoff valve MEX12 AA501, a combination valve MEX12 AA301, an electrical unloading valve MEX12AA001, an oil pump motor MEX11 AP001, and an oil pump motor MEX12 AP001.
In this embodiment, the needle module 5 is electrically connected to the pressure-holding module 6 and the hydraulic station module 4, and the needle module 5 includes a plurality of nozzle units arranged in parallel, where the nozzle units are arranged in one-to-one correspondence with the direction-adjusting units. Wherein the number of the nozzle units can be set according to the power adjustment requirement of the speed regulator. Preferably, the number of nozzle units is 6, and the number of integral units is identical to the number of nozzle units.
The nozzle unit comprises a one-way throttle valve, a sixth direction valve, a seventh direction valve and a proportional valve, wherein the input end of the one-way throttle valve is connected with the mechanical overspeed protection module 1, the port A of the one-way throttle valve is connected with the port B of the sixth direction valve, the port B of the one-way throttle valve is connected with the port B of the seventh direction valve, the port T of the sixth direction valve is connected with the whole direction module 3, the port T of the seventh direction valve is connected with the hydraulic station module 4, the first end of the proportional valve is connected with the port P of the seventh direction valve, the second end of the proportional valve is connected with the fourth port of the proportional valve, and the third end of the proportional valve is connected with the port P of the sixth direction valve. As shown in fig. 5, the one-way throttle valve MEX20AA701 corresponds to a one-way throttle valve, the directional valve MEX25 AA001 corresponds to a sixth directional valve, the directional valve MEX25 AA002 corresponds to a seventh directional valve, and the proportional valve MEX20 AA001.
In this embodiment, the pressure-containing module 6 includes a pressure container, a first air safety valve and an automatic air-supplementing device, a first end of the pressure container is connected with the direction-adjusting module 3, the hydraulic station module 4 and the needle module 5 respectively, a second end of the pressure container is connected with the automatic air-supplementing device through a diaphragm valve, and a third end of the pressure container is connected with the first air safety valve. The automatic air supplementing device comprises a second air safety valve, a second one-way valve and a two-position three-way ball valve, one end of a diaphragm valve is respectively connected with the input end of the first air safety valve, one end of the second one-way valve and the first end and the third end of the two-position three-way ball valve, the other end of the second one-way valve is connected with the second end of the two-position three-way ball valve, and the hydraulic station module 4 and the pressure-holding module 6 are connected with the spray needle module 5 through duplex oil filters.
As shown in fig. 6, the pressure vessel MEX16 BB001 corresponds to the pressure vessel, the air relief valve MX16AA002 corresponds to the first air relief valve, the automatic air supplementing device MEX16AA001, the first end of the pressure vessel is connected to the whole direction module 3, the hydraulic station module 4 and the needle module 5 through corresponding stop valves, the third end of the pressure vessel is connected to the second end of the two-position three-way ball valve through the membrane valve MEX16AA003 and the check valve, meanwhile, one end of the membrane valve MEX16AA003 is connected to the air relief valve, one end of the membrane valve MEX16AA003 is connected to the first end of the two-position three-way ball valve through the check valve, one end of the membrane valve MEX16AA003 is connected to the third end of the two-position three-way ball valve through the check valve, and the hydraulic station module 4 and the pressure vessel module 6 are connected to the needle module 5 through the duplex oil filter MEX20AT 001.
In this embodiment, the switching between nozzle units and the selection speed regulator set two selection modes for the start-up nozzle unit; when the nozzle units are automatically selected, starting nozzles are sequentially arranged from the nozzle unit No. 1 to the nozzle unit No. 6; when the nozzle unit is manually selected, the selected nozzle unit is always taken as a starting nozzle unit, and a user can select the nozzle unit according to the needs.
After the hydroelectric generating set is connected with the grid, the nozzle units are mutually switched along with the increase of load and flow, and the switching sequence is that the single nozzle unit operates, the double nozzle unit operates, the three nozzle unit operates, the four nozzle unit operates and the six nozzle unit operates in sequence. Symmetry is always ensured in mutual switching, and stable operation of the hydroelectric generating set is ensured. Examples are; the single nozzle unit is a No. 1 nozzle unit which operates, and the opened nozzle units are respectively No. 1-No. 1 along with the increase of load; no. 4-No. 1, no. 3; no. 5-No. 1, no. 2, no. 4; no. 5- - -No. 1, no. 2, no. 3, no. 4, no. 5, no. 6.
In order to realize high efficiency of the multi-nozzle impact type hydroelectric generating set, the multi-nozzle switching is required according to the output curve, and in order to solve the problems caused by the nozzle switching of the impact type hydroelectric generating set, the following calculation method is adopted:
U(k)＝U(k-1)+ΔU(k)
U(k-1)＝U(k-1)1+U(k-1)2+U(k-1)3+……U(k-1)n(n>1)
When U (k) > X1, the single nozzle unit operation is switched to the double nozzle unit operation, where U (k) =u (k) 1+U(k)2,U(k)1＝X1,U(k)2 =0. The nozzle unit U (k) n which is put into and smallest in the load increasing process takes precedence, for example, when the increasing load amount is Δu (k), then U (k) =u (k) 1+U(k)2,U(k)1＝X1,U(k)2 =Δu (k); the nozzles which exit in the load reduction process are prioritized, and then U (k) n with the maximum output power in the input nozzles is prioritized, for example, when the load reduction amount is delta U (k), U (k) =U (k) 1+U(k)2,U(k)1＝U(k)2 = (U (k-1) -delta U (k))/2, when U (k) < X1, U (k) 1＝X1/2,U(k)2＝(U(k-1)2 -delta U (k)) is equal to or less than U (k) 2 and less than X1/2, and the switching modes of the rest nozzle units are consistent with the modes, and are not repeated herein.
Wherein, the nozzle power corresponding to the switching point of the nozzle is set as: x1, X2, X3 … … Xn, U (k) represents the output power of the kth needle module 3, U (k-1) represents the output power of the kth-1 needle module 3, and U (k) n represents the output power of the nth nozzle unit in the kth.
As shown in fig. 7, for the output graphs of the respective nozzle units when the load of the speed governor increases, 1, 2, 3 and 4 are all numbers corresponding to the nozzle units, X1, X2 and X3 are respectively corresponding to the switching points of the nozzles, m1, m2, m3 and m4 are respectively denoted by U (k) n, wherein x1=m1, x2=2×m2, x3=3×m3, and it is apparent from fig. 7 that the output power corresponding to the nozzle units is significantly increased after the nozzle units are switched, and there is substantially no load fluctuation in the switching process.
As shown in fig. 8, in the output graphs of the respective nozzle units when the load of the governor decreases, 1, 2, 3 and 4 are numbers corresponding to the nozzle units, X1, X2 and X3 are switching points corresponding to the nozzles, respectively, m1, m2, m3 and m4 are U (k) n, respectively, where x1=m1, x2=2×m2, x3=3×m3, and it is apparent from fig. 8 that the decreasing speed of the output power corresponding to the nozzle units is uniform after the nozzle units are switched, and there is substantially no load fluctuation in the switching process.
In this embodiment, the governor has 4 control modes; a rotation speed control mode, a flow control mode, a power control mode and a water level control mode. Before grid connection, the speed regulator only operates according to a rotating speed control mode. After grid connection, the speed regulator can operate according to a flow control mode, a power control mode, a water level control mode and a rotating speed control mode (for isolated grid operation), and all the control modes can be switched without disturbance. The 4 control modes are all realized in an automatic operation mode, and each control mode has a respective transfer function.
Rotational speed control mode: the speed regulator automatically adjusts the opening of the nozzle according to the rotating speed signal of the hydroelectric generating set, so that the hydroelectric generating set operates at the rated rotating speed. The rotating speed control mode adopts a parallel PID structure, and the opening degree of the operation nozzle unit is determined by PID operation on the rotating speed given value and the rotating speed value difference value of the actual hydroelectric generating set. The permanent slip factor determines the effect of the frequency variation on the regulated output.
Flow control mode: and the speed regulator calculates the number of the nozzle units to be operated and the opening degree thereof according to the characteristic parameters of the water turbine according to the flow set value, and enables the nozzles to operate under the opening degree. The operator can set the flow set point through the monitoring system or change the flow set point through the up/down command. The flow set point for the flow control mode may be adjusted between-5% and 105%. The flow control mode can be selected after the hydropower unit is connected. During other modes of operation, the flow set point will track the actual flow value, so that an undisturbed switching between modes can be achieved at any time. The opening degree of the nozzle units is calculated from the flow rate set value and the number of the nozzle units put into operation.
Power control mode: the speed regulator regulates the number of the operating nozzles and the opening of the nozzles according to the power set value and the actual power feedback value, so that the hydroelectric generating set operates according to the power set value. The operator may set the power setting via the monitoring system or change the power setting via an up/down command. The power control mode requires the power feedback of the hydroelectric generating set to form a closed loop, and if the feedback fails, the speed regulator automatically switches to the flow mode for operation. The power setpoint for the power control mode may be adjusted between-5% and 105%. The power control mode can be selected after the hydropower unit is connected. During other modes of operation, the power setpoint will track the actual power value, thus enabling undisturbed switching between modes at any time.
Water level control mode: the speed regulator regulates the number of the operating nozzles and the opening of the nozzles according to the water level set value and the actual reservoir water level feedback signal, so that the hydroelectric generating set operates according to the water level set value. The operator can set the water level set point through the monitoring system or change the water level set point through the increase/decrease command. The water level control mode requires that the current water level signal forms a closed loop, and if the water level signal fails, the speed regulator automatically switches to the flow mode to work. The water level setting value of the water level control mode can be set only by a touch screen of the speed regulator or a monitoring system. The water level control mode can be selected after the hydropower unit is connected with the grid, when the water level control mode is switched to, the water level given value is firstly equal to the actual water level value, and then the water level given value is changed to the set value by a certain slope, so that the disturbance during mode conversion is reduced to the greatest extent.
In this embodiment, the speed governor has 3 modes of operation; automatic operation, manual operation and emergency stop operation. The manual operation and the automatic operation are selected by an automatic/manual change-over switch on the regulator electrical cabinet; the emergency stop operation is operated by an emergency stop button on the electrical cabinet or an emergency stop button on the mechanical cabinet, and may also be operated by an emergency stop instruction from the monitoring system.
The manual operation is mainly used during debugging, and when the automatic/electric manual selection switch is in a manual position, the opening/closing operation of the nozzles which are selected on the touch screen and need to be manually operated can be performed on the panel of the electrical cabinet through the increasing/decreasing switch. During manual operation of each nozzle, the opening of its corresponding deflector will operate automatically according to the co-ordination curve. The speed governor is in a manual mode of operation and will not accept any instructions (e.g., start-up, shut-down, load change, etc.) from the monitoring system other than the emergency shutdown instructions.
When the automatic/manual selection switch is placed in the automatic position, the operation of the speed regulator is automatically controlled according to the instruction of the monitoring system. After the speed regulator receives the starting instruction of the monitoring system, the opening limit of the nozzle is increased to the starting opening degree at the speed of 5%/s (the value can be adjusted in the field debugging process), and the speed regulator automatically enters a rotating speed control mode. When the rotating speed is increased to 98% of rated rotating speed, the speed regulator automatically tracks the frequency of the power grid so as to facilitate grid connection; the speed regulator can also receive the frequency increasing/decreasing command of the synchronous device when the hydroelectric generating set is synchronous, and the frequency setting value of the hydroelectric generating set is adjusted so as to accelerate the grid connection speed. The speed regulator is started by adopting two symmetrical nozzle units, and can be started by adopting a single nozzle unit if required. After the hydroelectric generating set is connected with the grid, the speed regulator is automatically switched into a flow control mode. If necessary, the speed regulator can be manually operated, or can be switched to a power control mode, a water level control mode and a rotating speed control (for isolated network operation) mode according to the instruction of the monitoring system. The governor, upon receiving the shutdown command, first limits the needle module 5 to the current nozzle position, and then closes to full shut at an appropriate rate, regardless of the control mode at the time.
The emergency stop operation has the highest priority, and whenever there is an emergency stop operation instruction (from a manual button or monitoring system), all the deflectors will close to the fully closed position at the fastest speed under the action of the emergency stop module 2, while the speed governor automatically closes the needle module 5, regardless of whether the speed governor is in manual operation or automatic operation.
A complete real-time program diagnosis and self-diagnosis system is arranged in the speed regulator, and can respond to internal and external faults of the speed regulator, such as CPU faults, internal power supply faults, nozzle feedback faults, deflector feedback faults, frequency measurement faults, power faults, water head faults and the like in real time and process according to fault properties. The system has self-diagnosis and corresponding fault tolerance functions, can indicate faults on the touch screen, and simultaneously sends fault information to the monitoring system in a communication mode. Such as analog-to-digital converter and input channel failures; digital-to-analog converter and output channel failure; a feedback channel failure; failure of the hydraulic follower system; program errors, clock faults, etc.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (8)
1. The multi-nozzle hydraulic linkage type speed regulator is characterized by comprising a mechanical overspeed protection module (1), an emergency stop module (2), a direction adjusting module (3), a hydraulic station module (4), a spray needle module (5) and a pressure containment module (6),
The mechanical overspeed protection module (1) is respectively and electrically connected with the emergency stop module (2), the direction adjusting module (3) and the hydraulic station module (4);
the emergency stop module (2) is respectively and electrically connected with the direction adjusting module (3) and the needle module (5);
The direction adjusting module (3) is respectively and electrically connected with the hydraulic station module (4), the needle module (5) and the pressure volume module (6), and the direction adjusting module (3) comprises a plurality of direction adjusting units which are arranged in parallel;
The spray needle module (5) is electrically connected with the pressure-holding module (6) and the hydraulic station module (4), the spray needle module (5) comprises a plurality of spray nozzle units which are arranged in parallel, and the spray nozzle units are arranged in one-to-one correspondence with the whole direction units.
2. The multi-nozzle hydraulic linkage speed regulator according to claim 1, wherein the emergency stop module (2) comprises a first electromagnetic valve, a first direction valve, a second direction valve and a third direction valve, a first end of the first electromagnetic valve is connected with an input end of the second direction valve and the mechanical overspeed protection module (1) respectively, a second end of the first electromagnetic valve is connected with an input end of the first direction valve, a third end of the first electromagnetic valve is connected with a T port of the first direction valve and a T port of the third direction valve respectively, P ports of the first direction valve, the second direction valve and the third direction valve are connected with the whole direction module (3), a B port of the first direction valve is connected with the whole direction module (3), and a B port of the second direction valve is connected with a connecting point.
3. The multi-nozzle hydraulic linkage speed regulator according to claim 1, wherein the direction regulating unit comprises a second electromagnetic valve, a fourth direction valve and a fifth direction valve, a port B of the fourth direction valve is connected with the mechanical overspeed protection module (1), a port T of the fourth direction valve and a port T of the fifth direction valve are both connected with adjacent direction regulating units, a port P of the fourth direction valve is connected with a port B of the fifth direction valve, a port P of the fifth direction valve is connected with the needle module (5), a first end of the second electromagnetic valve is connected with the needle module (5), a second end of the second electromagnetic valve is connected with an input end of the fifth direction valve, a third end of the second electromagnetic valve is connected with the direction regulating module (3), and a fourth end of the second electromagnetic valve is connected with a coil end of the fifth direction valve.
4. The multi-nozzle hydraulic linkage speed regulator according to claim 1, wherein the nozzle unit comprises a one-way throttle valve, a sixth direction valve, a seventh direction valve and a proportional valve, wherein an input end of the one-way throttle valve is connected with the mechanical overspeed protection module (1), an a port of the one-way throttle valve is connected with a B port of the sixth direction valve, a B port of the one-way throttle valve is connected with a B port of the seventh direction valve, a T port of the sixth direction valve is connected with the alignment module (3), a T port of the seventh direction valve is connected with the hydraulic station module (4), a first end of the proportional valve is connected with a P port of the seventh direction valve, a second end and a fourth end of the proportional valve are both connected with adjacent nozzle units, and a third end of the proportional valve is connected with a P port of the sixth direction valve.
5. The multi-nozzle hydraulic linkage speed regulator according to claim 1, wherein the hydraulic station module (4) comprises an oil filter, a first one-way valve, a stop valve, a combination valve and an electric unloading valve, an A port of the combination valve is sequentially connected with the pressure containment module (6) through the oil filter, the first one-way valve and the stop valve, an A port of the combination valve is further connected with the mechanical overspeed protection module (1), a B port of the combination valve is respectively connected with input ends of the whole direction module (3), the pressure containment module (6) and the combination valve, and input ends of the combination valve are respectively connected with a first end and a second end of the electric unloading valve.
6. The multi-nozzle hydraulic linkage speed regulator according to claim 1, wherein the pressure vessel module (6) comprises a pressure vessel, a first air safety valve and an automatic air supplementing device, a first end of the pressure vessel is respectively connected with the direction adjusting module (3), the hydraulic station module (4) and the needle module (5), a second end of the pressure vessel is connected with the automatic air supplementing device through a diaphragm valve, and a third end of the pressure vessel is connected with the first air safety valve.
7. The multi-nozzle hydraulic linkage speed regulator according to claim 6, wherein the automatic air supplementing device comprises a second air safety valve, a second one-way valve and a two-position three-way ball valve, one end of the diaphragm valve is respectively connected with the input end of the first air safety valve, one end of the second one-way valve and the first end and the third end of the two-position three-way ball valve, and the other end of the second one-way valve is connected with the second end of the two-position three-way ball valve.
8. The multi-nozzle hydraulic linkage governor according to claim 1, characterized in that the hydraulic station module (4) and the pressure-containing module (6) are both connected to the needle module (5) by means of a duplex oil filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322211281.2U CN220955901U (en) | 2023-08-17 | 2023-08-17 | Multi-nozzle hydraulic linkage speed regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322211281.2U CN220955901U (en) | 2023-08-17 | 2023-08-17 | Multi-nozzle hydraulic linkage speed regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220955901U true CN220955901U (en) | 2024-05-14 |
Family
ID=91006223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322211281.2U Active CN220955901U (en) | 2023-08-17 | 2023-08-17 | Multi-nozzle hydraulic linkage speed regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220955901U (en) |
-
2023
- 2023-08-17 CN CN202322211281.2U patent/CN220955901U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102619580B (en) | Method and system for controlling one-time frequency modulation | |
| CN111520316B (en) | Multi-pump parallel multi-frequency conversion synchronous speed regulation water supply control system and control method thereof | |
| JPS62178200A (en) | Controller for generated output | |
| CN220955901U (en) | Multi-nozzle hydraulic linkage speed regulator | |
| CN110826230A (en) | Nuclear power plant condensate pump operation process simulation method | |
| CN110825016A (en) | Double-frequency-conversion automatic control system of non-negative-pressure water supply equipment and implementation method thereof | |
| CN113405088A (en) | Three-impulse frequency conversion automatic adjusting method | |
| CN210239900U (en) | Hydraulic turbine speed regulator with start-stop protection function | |
| CN111896241A (en) | Method and device for testing partial stroke activity of steam turbine valve | |
| CN113309660B (en) | Intelligent sectional closing control system and method for speed regulator | |
| CN110173358A (en) | It is a kind of power generation with free-turbine engine removal of load when method for adjusting rotation speed | |
| CN204493314U (en) | A kind of impulse turbine speed regulator hydraulic pressure installation of integrated accident distributing valve | |
| CN209228416U (en) | The gas source apparatus for fast switching of steam feed pump | |
| CN112196017A (en) | Redundancy measurement control's water plant booster station constant pressure water supply intelligence control system | |
| CN217501854U (en) | Hydraulic device with purely manual power-off self-closing speed regulation system | |
| CN216788492U (en) | Power grid outlet power control system of steam turbine generator unit | |
| CN217440120U (en) | Steam power vacuum pumping system | |
| CN215486900U (en) | Hydraulic pipeline system device of speed regulator of water turbine | |
| CN220381492U (en) | Control system of variable-rate pump recirculation regulating valve with unidirectional locking function | |
| CN114421478B (en) | Closed-loop control method for power of speed regulator of huge hydropower plant | |
| CN210005914U (en) | double-frequency-conversion automatic control system of non-negative-pressure water supply equipment | |
| CN117452850A (en) | Analog quantity pulse control method | |
| CN102644544B (en) | Low-head Kaplan turbine regulating method | |
| JPH0428907B2 (en) | ||
| CN117234135A (en) | Analog quantity pulse multiplexing control system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |