CN211952199U - Power station high-low pressure pump station electrical control system - Google Patents
Power station high-low pressure pump station electrical control system Download PDFInfo
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- CN211952199U CN211952199U CN201922457240.5U CN201922457240U CN211952199U CN 211952199 U CN211952199 U CN 211952199U CN 201922457240 U CN201922457240 U CN 201922457240U CN 211952199 U CN211952199 U CN 211952199U
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Abstract
The utility model discloses a high-low pressure pump station electrical control system of a hydropower station, which comprises a high-low pressure pump station control device, wherein the input end of the high-low pressure pump station control device is respectively connected with a high-level oil tank magnetic turning plate liquid level transmitter, a hub oil tank magnetic turning plate liquid level transmitter, a lubricating oil tank magnetic turning plate liquid level transmitter, an oil leakage tank magnetic turning plate liquid level transmitter, a pressure switch at the outlet of a No. 1 or No. 2 high-pressure oil pump, and a flow switch at the outlet of a No. 1 or No. 2 lubricating oil pump; the output end of the high-low pressure pump station control device is connected with an oil pump motor set; the high-low pressure pump station control device is internally provided with a PLC switching value input module, a PLC analog value input module, a PLC switching value output module, a PLC analog value output module, a communication module and a human-computer interface. The system adopts two control modes of manual operation and automatic operation, is convenient for personnel to operate or automatically control, adopts a human-computer interface, is more visual, and is applicable to automatic circulation control of lubricating oil or oil level control of other oil systems.
Description
Technical Field
The utility model belongs to the lubricating oil circulation system control field of power station bulb through-flow unit relates to a power station high-low pressure pump station electrical control system.
Background
The electrical control system of the high-low pressure pump station is an important component of auxiliary equipment of a hydraulic power plant, at present, the technology based on the traditional conventional relay control, three-element motor control technology (a circuit breaker, a contactor and a thermal relay) or the micro PLC with single logic processing is easy to break down, difficult to maintain, complex in structure and the like, and cannot meet the development requirements of 'less people on duty and unattended' of the current hydraulic power plant, and meanwhile, the electrical control system cannot realize large-capacity data exchange and single man-machine conversation with a whole plant monitoring system, and cannot display the operation condition of the system and inquire historical operation data in real time; therefore, an electrical control system for a high-low pressure pump station of a hydropower station is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the utility model provides a power station high-low pressure pump station electrical control system, has solved the not enough of above-mentioned problem.
The utility model adopts the technical scheme as follows:
a high-low pressure pump station electrical control system of a hydropower station comprises a high-low pressure pump station control device, wherein the input end of the high-low pressure pump station control device is respectively connected with a high-level oil tank magnetic turning plate liquid level transmitter, a hub oil tank magnetic turning plate liquid level transmitter, a lubricating oil tank magnetic turning plate liquid level transmitter, a leakage oil tank magnetic turning plate liquid level transmitter, a pressure switch at the outlet of a No. 1 or No. 2 high-pressure oil pump, and a flow switch at the outlet of a No. 1 or No. 2 lubricating oil pump; the output end of the high-low pressure pump station control device is connected with an oil pump motor set; the high-low pressure pump station control device is internally provided with a PLC switching value input module, a PLC analog value input module, a PLC switching value output module, a PLC analog value output module, a communication module and a human-computer interface; and the high-low pressure pump station control device is in communication connection with the unit LCU through a hard contact switching value, an analog quantity uploading circuit and a communication module.
This scheme is not enough to prior art, adopt high performance PLC to be the core control unit, external element configuration oil level changer, the temperature measurement changer, and internal element are devices such as the contactor of famous producer production, air switch, relay, the realization is to hydraulic power plant unit lubricating oil system's automatic control, system protection, fault alarm, upper communication function etc, this system adopts manual and automatic two kinds of control mode, make things convenient for personnel's operation or automated control, the system has adopted man-machine interface more, more directly perceived, the system is applicable in lubricating oil automatic control or other oil system's control.
Further, the oil pump motor set comprises a No. 1 high-pressure oil pump, a No. 2 high-pressure oil pump, a No. 1 lubricating oil pump, a No. 2 lubricating oil pump and an oil leakage pump; the five oil pump inlet wire main power supplies are provided with a double-power switching device; the control loop of the No. 1 high-pressure oil pump is provided with a No. 1 high-pressure oil pump motor control mode selection switch, a No. 1 high-pressure oil pump motor start-stop button, a No. 1 high-pressure oil pump motor fault protection contact and a No. 1 high-pressure oil pump start-stop control relay; the control loop of the No. 2 high-pressure oil pump is provided with a No. 2 high-pressure oil pump motor control mode selection switch, a No. 2 high-pressure oil pump motor start-stop button, a No. 2 high-pressure oil pump motor fault protection contact and a No. 2 high-pressure oil pump start-stop control relay; the control loop of the lubricating oil pump No. 1 is provided with a lubricating oil pump No. 1 motor control mode selection switch, a lubricating oil pump No. 1 motor start-stop button, a lubricating oil pump No. 1 motor fault protection contact and a lubricating oil pump No. 1 start-stop control relay; the control loop of the lubricating oil pump No. 2 is provided with a lubricating oil pump No. 2 motor control mode selection switch, a lubricating oil pump No. 2 motor start-stop button, a lubricating oil pump No. 2 motor fault protection contact and a lubricating oil pump No. 2 start-stop control relay; and a control loop of the oil leakage pump is provided with an oil leakage pump motor control mode selection switch, an oil leakage pump motor start-stop button, an oil leakage pump motor fault protection contact and an oil leakage pump start-stop control relay.
The PLC is provided with a PLC switching value input module, a PLC analog value input module, a PLC switching value output module, a PLC analog value output module and a communication module.
The PLC switching value input module collects signals at least comprising a unit starting order signal, a unit stopping completion order, a rotating speed 95% signal, a No. 1 high-pressure oil pump automatic state normal signal, a No. 2 high-pressure oil pump automatic state normal signal, a No. 1 lubricating oil pump automatic state normal signal, a No. 2 lubricating oil pump automatic state normal signal, a oil leakage pump automatic state normal signal and a high oil tank magnetic turning plate switching signal, wherein the switching signals at least comprise a high oil tank oil level overhigh signal, a high oil tank oil level high signal, a high oil tank oil level overlow signal and a high oil tank accident low oil level signal, the switching signals at least comprise a hub oil tank oil level overhigh signal and a high oil tank oil level overlow signal, the lubricating oil tank magnetic turning plate switching signals at least comprise a lubricating oil tank oil level overhigh signal, a lubricating oil tank oil level overh, A high oil level signal of the lubricating oil tank, a low oil level signal of the lubricating oil tank, a pressure switch signal of an outlet of the high-pressure oil pump and a flow switch of an outlet of the lubricating oil pump.
Further, the output of the PLC switching value output module includes: PLC operation contact, device comprehensive failure contact, the low oil level contact of high-order oil tank accident, wheel hub oil tank oil level crosses the contact excessively, the lubricating-oil tank oil level crosses the contact excessively, the oil leakage tank oil level crosses the contact excessively, No. 1 high-pressure oil pump automatic control relay contact, No. 2 high-pressure oil pump automatic control relay contact, No. 1 lubricating-oil pump automatic control relay contact, No. 2 lubricating-oil pump automatic control relay contact, oil leakage pump automatic control relay contact.
Furthermore, the output of the PLC analog quantity output module comprises an analog quantity signal sent from the high-level oil tank, an analog quantity signal sent from the hub oil tank, an analog quantity signal sent from the lubricating tank, and an analog quantity signal sent from the leaked oil tank.
Further, the communication module comprises any one of an RS485 communication component or an Ethernet communication component.
Further, the human-computer interface is a liquid crystal touch screen.
Further, the content displayed by the human-computer interface comprises: the number of the accumulated operation times of the high-pressure oil pump is 1, the accumulated operation time of the high-pressure oil pump is 1, the accumulated operation times of the high-pressure oil pump is 2, the accumulated operation time of the high-pressure oil pump is 2, the accumulated operation times of the lubricating oil pump is 1, the accumulated operation time of the lubricating oil pump is 1, the accumulated operation times of the lubricating oil pump is 2, the accumulated operation times of the oil leakage pump, the accumulated operation time of the oil leakage pump, the high-level oil tank level, the hub oil tank.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
the system adopts two control modes of manual operation and automatic operation, is convenient for personnel to operate or automatically control, adopts a human-computer interface, is more visual, and is applicable to automatic control of lubricating oil or control of other oil systems.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that for those skilled in the art, other relevant drawings can be obtained according to the drawings without inventive effort, wherein:
FIG. 1 is a signal path diagram of an electrical control system of a high-low pressure pump station of a hydropower station;
fig. 2 is a control schematic diagram of an electrical control system of a high-low pressure pump station of a hydropower station.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Example one
The utility model provides a high-low pressure pump station electrical control system of power station, including high-low pressure pump station controlling means, high-order oil tank magnetism turns over board liquid level transmitter, wheel hub oil tank magnetism turns over board liquid level transmitter, lubricating-oil tank magnetism turns over board liquid level transmitter, oil leakage tank magnetism turns over board liquid level transmitter, the pressure switch of No. 1, No. 2 high-pressure oil pump export, the flow switch of No. 1, No. 2 lubricating-oil pump export respectively to the input of high-low pressure pump station controlling means; the output end of the high-low pressure pump station control device is connected with an oil pump motor set; the high-low pressure pump station control device is internally provided with a PLC switching value input module, a PLC analog value input module, a PLC switching value output module, a PLC analog value output module, a communication module and a human-computer interface; and the high-low pressure pump station control device is in communication connection with the unit LCU through a hard contact switching value, an analog quantity uploading circuit and a communication module.
When in work: adopt high performance PLC to be the core control unit, the external element configuration oil level changer, temperature measurement changer and internal element are devices such as contactor, air switch, the relay of famous producer production, realize automatic control, system protection to hydroelectric power plant unit lubricating oil system, fault alarm, upper communication function etc. this system adopts manual and automatic two kinds of control methods, make things convenient for personnel's operation or automated control, the system has adopted human-computer interface more, more directly perceived, the system is applicable in lubricating oil automatic control or other oil system's control.
Example two
In this embodiment, on the basis of the first embodiment, as shown in fig. 2, the PLC is provided with a PLC switching value input module, a PLC analog value input module, a PLC switching value output module, a PLC analog value output module, and a communication module. The PLC switching value input module collects signals at least comprising a unit starting command signal, a unit stopping completion command synthesis, a rotating speed 95% signal, a No. 1 high-pressure oil pump automatic state normal signal, a No. 2 high-pressure oil pump automatic state normal signal, a No. 1 lubricating oil pump automatic state normal signal, a No. 2 lubricating oil pump automatic state normal signal, a oil leakage pump automatic state normal signal and a high oil tank magnetic turning plate switching signal, wherein the switching signals at least comprise a high oil tank oil level overhigh signal, a high oil tank oil level high signal, a high oil tank oil level overlow signal and a high oil tank accident low oil level signal, the switching signals at least comprise a hub oil tank oil level overhigh signal and a high oil tank oil level overlow signal, the lubricating oil tank magnetic turning plate switching signals at least comprise a lubricating oil tank oil level overhigh signal, a lubricating oil tank oil level overh, A high oil level signal of the lubricating oil tank, a low oil level signal of the lubricating oil tank, a pressure switch signal of an outlet of the high-pressure oil pump and a flow switch of an outlet of the lubricating oil pump. The PLC analog input module at least collects the data including a life high-level oil tank magnetic turning plate liquid level sensor, a hub oil tank magnetic turning plate liquid level sensor, a lubricating oil tank magnetic turning plate liquid level sensor and an oil leakage tank magnetic turning plate liquid level sensor. The output of the PLC switching value output module at least comprises a PLC operation signal, a system comprehensive fault signal, a No. 1 high oil pump control relay signal, a No. 2 high oil pump control relay signal, a No. 1 lubricating oil pump control relay signal, a No. 2 lubricating oil pump control relay signal and a oil leakage pump control relay signal. The communication module at least comprises one of RS485 communication or Ethernet communication; the upward-feeding analog quantity signal at least comprises a high-level oil tank level, a hub oil tank level, a lubricating oil tank level and a leakage oil tank level, and the upward-feeding switching quantity signal at least comprises a PLC (programmable logic controller) operation signal, a system comprehensive fault and the like
The working principle of the electric control system of the high-low pressure pump station of the hydropower station is as follows:
no. 1, No. 2 high-pressure oil pump
When the unit is in a starting state, executing a signal when the unit is started, and if the automatic state normal signal of the No. 1 high-pressure oil pump is met, starting and operating the No. 1 high-pressure oil pump as a main working oil pump, and correspondingly starting the No. 2 high-pressure oil pump as a standby working pump; if the automatic state normal signal of the No. 1 high-pressure oil pump is not satisfied, starting the No. 2 high-pressure oil pump as a primary working oil pump, and correspondingly, taking the No. 1 high-pressure oil pump as a standby working pump, stopping the primary high-pressure oil pump (No. 1 or No. 2) when a signal of 95% of the rotation speed of the unit is input, and if the outlet pressure switch signal of the high-pressure oil pump is not monitored during the starting operation of the primary oil pump, correspondingly switching the primary high-pressure oil pump and the standby high-pressure oil pump; the switching value output module uniformly outputs a system comprehensive fault signal no matter whether the main oil pump or the backup oil pump fails to start and operate normally due to a fault in the starting process.
When the unit is in a shutdown state, the unit is stopped to execute a signal, if the automatic state normal signal of the No. 1 high-pressure oil pump is met, the No. 1 high-pressure oil pump is started to operate as a main working oil pump, and correspondingly, the No. 2 high-pressure oil pump is a standby working pump; if the automatic state normal signal of the No. 1 high-pressure oil pump is not satisfied, starting the No. 2 high-pressure oil pump as a primary working oil pump, and correspondingly taking the No. 1 high-pressure oil pump as a standby working pump, stopping the primary high-pressure oil pump (No. 1 or No. 2) when the unit stops and a signal is input, and correspondingly rotating the primary high-pressure oil pump and the standby high-pressure oil pump if the outlet pressure switch signal of the high-pressure oil pump does not monitor the normal outlet pressure signal of the high-pressure oil pump during the starting operation of the primary oil pump; the switching value output module uniformly outputs a system comprehensive fault signal no matter whether the main oil pump or the backup oil pump fails to start and operate normally due to a fault in the starting process.
No. 1, No. 2 lubricating oil pump
The number 1 and number 2 lubricating oil pumps are jointly controlled by a high-level oil tank and a lubricating oil tank oil level, when the oil level of the high-level oil tank changes, a magnetic turning plate signal of the high-level oil tank simultaneously outputs a switching value signal and an analog value signal (wherein the analog value signal is not a main control signal, and the switching value is a standby control signal), when the oil level of the lubricating oil tank changes, the magnetic turning plate signal of the lubricating oil tank simultaneously outputs a switching value signal and an analog value signal, if the automatic state normal signal of the number 1 lubricating oil pump is met, the number 1 lubricating oil pump serves as a main working oil pump, and the number 2 lubricating oil pump serves as a standby working oil pump; on the contrary, if the automatic state normal signal of the lubricating oil pump No. 2 is met, the lubricating oil pump No. 2 is used as a main working oil pump, and the lubricating oil pump No. 1 is used as a standby working oil pump. When the high-level oil level is lower than the starting oil level of the main working oil pump or the lubricating oil tank is higher than the starting oil level of the main working oil pump, the main working oil pump is started, and when the high-level oil level continues to fall to the starting oil level of the standby working oil pump or the lubricating oil tank continues to rise to the starting oil level of the standby working oil pump, the standby working oil pump is started. When the oil level of the high-level oil tank is too high or the oil level of the lubricating oil tank is too low, all the currently-operated lubricating oil pumps are stopped (including the main working oil pump and the standby working oil pump), and the main working oil pump and the standby working oil pump are correspondingly alternated. Meanwhile, when the analog quantity signal or the switching quantity signal monitors that the high-level oil tank accident is low or the lubricating oil tank excessively low, the switching quantity output module correspondingly outputs a high-level oil tank accident low oil level signal and a lubricating oil tank excessively low oil level signal.
Oil leakage pump
The oil leakage pump is jointly controlled by a hub oil tank and the oil level of the oil leakage tank, when the oil level of the hub oil tank changes, a magnetic turning plate signal of the hub oil tank simultaneously outputs a switching value signal and an analog value signal (wherein the analog value signal is not a main control signal, and the switching value is a standby control signal). Meanwhile, when the analog quantity signal or the switching quantity signal monitors that the oil level of the hub oil tank is too low or the oil level of the leakage oil tank is too high, the switching quantity output module correspondingly outputs a high-level oil tank accident low oil level signal and a lubricating oil tank too low oil level signal.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents and improvements made by those skilled in the art within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The utility model provides a power station high-low pressure pump station electrical control system which characterized in that: the system comprises a high-low pressure pump station control device, wherein the input end of the high-low pressure pump station control device is respectively connected with a high-level oil tank magnetic turning plate liquid level transmitter, a hub oil tank magnetic turning plate liquid level transmitter, a lubricating oil tank magnetic turning plate liquid level transmitter, an oil leakage tank magnetic turning plate liquid level transmitter, pressure switches at No. 1 and No. 2 high-pressure oil pump outlets and flow switches at No. 1 and No. 2 lubricating oil pump outlets;
the output end of the high-low pressure pump station control device is connected with an oil pump motor set; the high-low pressure pump station control device is internally provided with a PLC switching value input module, a PLC analog value input module, a PLC switching value output module, a PLC analog value output module, a communication module and a human-computer interface; and the high-low pressure pump station control device is in communication connection with the unit LCU through a hard contact switching value, an analog quantity uploading circuit and a communication module.
2. The electrical control system of the high-low pressure pump station of the hydropower station according to claim 1, characterized in that: the oil pump motor set comprises a No. 1 high-pressure oil pump, a No. 2 high-pressure oil pump, a No. 1 lubricating oil pump, a No. 2 lubricating oil pump and an oil leakage pump; the five oil pump inlet wire main power supplies are provided with a double-power switching device;
the control loop of the No. 1 high-pressure oil pump is provided with a No. 1 high-pressure oil pump motor control mode selection switch, a No. 1 high-pressure oil pump motor start-stop button, a No. 1 high-pressure oil pump motor fault protection contact and a No. 1 high-pressure oil pump start-stop control relay;
the control loop of the No. 2 high-pressure oil pump is provided with a No. 2 high-pressure oil pump motor control mode selection switch, a No. 2 high-pressure oil pump motor start-stop button, a No. 2 high-pressure oil pump motor fault protection contact and a No. 2 high-pressure oil pump start-stop control relay;
the control loop of the lubricating oil pump No. 1 is provided with a lubricating oil pump No. 1 motor control mode selection switch, a lubricating oil pump No. 1 motor start-stop button, a lubricating oil pump No. 1 motor fault protection contact and a lubricating oil pump No. 1 start-stop control relay;
the control loop of the lubricating oil pump No. 2 is provided with a lubricating oil pump No. 2 motor control mode selection switch, a lubricating oil pump No. 2 motor start-stop button, a lubricating oil pump No. 2 motor fault protection contact and a lubricating oil pump No. 2 start-stop control relay;
and a control loop of the oil leakage pump is provided with an oil leakage pump motor control mode selection switch, an oil leakage pump motor start-stop button, an oil leakage pump motor fault protection contact and an oil leakage pump start-stop control relay.
3. The electrical control system of the high-low pressure pump station of the hydropower station according to claim 1, characterized in that: the PLC switching value output module comprises: PLC operation contact, device comprehensive failure contact, high-order oil tank accident low oil level contact, wheel hub oil tank oil level hang down the contact excessively, lubricating-oil tank oil level hang down the contact excessively, leak oil tank oil level hang down the contact excessively, No. 1 high-pressure oil pump automatic control relay contact, No. 2 high-pressure oil pump automatic control relay contact, leak oil pump automatic control relay contact.
4. The electrical control system of the high-low pressure pump station of the hydropower station according to claim 1, characterized in that: the PLC analog quantity output module comprises an analog quantity signal sent from the high-level oil tank, an analog quantity signal sent from the hub oil tank, an analog quantity signal sent from the lubricating tank, and an analog quantity signal sent from the oil leakage tank.
5. The electrical control system of the high-low pressure pump station of the hydropower station according to claim 1, characterized in that: the communication module comprises any one of an RS485 communication component or an Ethernet communication component.
6. The electrical control system of the high-low pressure pump station of the hydropower station according to claim 1, characterized in that: the human-computer interface is a liquid crystal touch screen.
7. The electrical control system of the high-low pressure pumping station of the hydropower station according to claim 6, characterized in that: the content displayed by the human-computer interface comprises: the number of the accumulated operation times of the high-pressure oil pump is 1, the accumulated operation time of the high-pressure oil pump is 1, the accumulated operation times of the high-pressure oil pump is 2, the accumulated operation time of the high-pressure oil pump is 2, the accumulated operation times of the lubricating oil pump is 1, the accumulated operation time of the lubricating oil pump is 1, the accumulated operation times of the lubricating oil pump is 2, the accumulated operation times of the oil leakage pump, the accumulated operation time of the oil leakage pump, the high-level oil tank level, the hub oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922457240.5U CN211952199U (en) | 2019-12-31 | 2019-12-31 | Power station high-low pressure pump station electrical control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922457240.5U CN211952199U (en) | 2019-12-31 | 2019-12-31 | Power station high-low pressure pump station electrical control system |
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| Publication Number | Publication Date |
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| CN211952199U true CN211952199U (en) | 2020-11-17 |
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| CN201922457240.5U Active CN211952199U (en) | 2019-12-31 | 2019-12-31 | Power station high-low pressure pump station electrical control system |
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