CN212231173U - Power station control system - Google Patents

Power station control system Download PDF

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Publication number
CN212231173U
CN212231173U CN202021290421.XU CN202021290421U CN212231173U CN 212231173 U CN212231173 U CN 212231173U CN 202021290421 U CN202021290421 U CN 202021290421U CN 212231173 U CN212231173 U CN 212231173U
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China
Prior art keywords
voltage
unit
power supply
switching
generator
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CN202021290421.XU
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Chinese (zh)
Inventor
吕俊
罗卫华
肖军浪
任雪萍
韦海峰
于部波
宋鹏超
陈彦京
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Pla Rocket Force Engineering Design Research Institute
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Pla Rocket Force Engineering Design Research Institute
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20Smart grids as enabling technology in buildings sector
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/12Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems
    • Y04S20/248UPS systems or standby or emergency generators

Abstract

The application relates to a power station control system, which comprises field layer equipment, control layer equipment and management layer equipment; the field layer equipment mainly comprises a self-contained power supply unit, an external power supply unit and a power supply switching unit which are used for forming a power station; the self-contained power supply unit and the external power supply unit are respectively connected with a first input end and a second input end of the power supply switching unit, and an output end of the power supply switching unit is used for being connected with a power station load; the control layer device is respectively connected with the field layer device and the management layer device through a communication network. The power station reliability is improved, the force allocation of the watch keeper is reduced, and the response time of the power station is effectively shortened.

Description

Power station control system
Technical Field
The application relates to the technical field of power stations, in particular to a power station control system.
Background
The power stations arranged in a large number of projects generally comprise an external power supply (external power supply for short) and a self-contained power supply, the external power supply is led from a 10kV public power grid (commercial power), a diesel generator set is arranged as the self-contained power supply, the power stations are designed and operated and managed by the concept of 'professional watching', and the operation and maintenance technical level of the watching staff can greatly influence the reliable operation of the power stations.
Based on this, in order to effectively improve the reliability of the power station, solve the informatization, scientization and standardization level of management and maintenance and reduce the problem of force allocation of the watchman, the prior art does not provide an effective solution.
Disclosure of Invention
To solve the above technical problem or at least partially solve the above technical problem, the present application provides a power plant control system.
The application provides a power station control system, which comprises field layer equipment, control layer equipment and management layer equipment; the field layer equipment mainly comprises a self-contained power supply unit, an external power supply unit and a power supply switching unit which are used for forming a power station;
the self-contained power supply unit and the external power supply unit are respectively connected with a first input end and a second input end of the power supply switching unit, and an output end of the power supply switching unit is used for being connected with a power station load; the control layer device is respectively connected with the field layer device and the management layer device through a communication network.
Optionally, the power switching unit includes a first high-voltage backup power automatic switching device and a low-voltage automatic transfer switch ATSE device; the self-contained power supply unit comprises a generator set and an auxiliary system linked with the generator set, and the generator set comprises a high-voltage generator set and a low-voltage generator set; the external power unit comprises an external power supply for the high-voltage unit and an external power supply for the low-voltage unit, and the external power supply for the low-voltage unit is provided with a step-down transformer;
the high-voltage generator set and the external power supply for the high-voltage generator set are respectively connected with a first input end and a second input end of the first high-voltage automatic backup switching device, and an output end of the first high-voltage automatic backup switching device is connected with a substation outlet cabinet for the high-voltage generator set;
the low-voltage generator set and the step-down transformer are respectively connected with a first input end and a second input end of the ATSE device, and an output end of the ATSE device is connected with a direct-supply load cabinet of the generator set.
Optionally, the power switching unit further includes a second high-voltage backup power automatic switching device; the low-voltage generator set is divided into a first link and a second link; the first link is connected with a first input end of the first high-voltage spare power automatic switching device; the second link is provided with a boosting transformer; the step-up transformer and the external power supply for the low-voltage unit are respectively connected with a first input end and a second input end of the second high-voltage automatic switching device, and an output end of the second high-voltage automatic switching device is connected with a substation outlet cabinet for the low-voltage unit.
Optionally, the generator set is provided with a machine-side controller, a circuit breaker, an actuating mechanism and a parameter measuring device, wherein the machine-side controller is used for presetting a control unit.
Optionally, the auxiliary system comprises an external circulating water system, an oil supply system, a ventilation system and a smoke abatement and temperature reduction device.
Optionally, the control layer device includes a set controller, and the set controller is connected to the set-side controller, the parameter detection device, and the actuator through a communication network.
Optionally, the control layer device further includes a touch device and a programmable logic controller PLC module; the touch device is respectively connected with the unit controller and the PLC module.
Optionally, the management layer device comprises a system controller; the system controller is respectively connected with the unit controller, the touch device and the PLC module through a communication network.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
according to the power station management and maintenance system, the reliability of the power station is improved, the informatization, scientization and standardization levels of power station management and maintenance are achieved, the force allocation of watchmen is reduced, and the response time of the power station is effectively shortened.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a schematic diagram of a plant control system provided in various embodiments of the present application;
fig. 2 is a schematic diagram of a power station according to various embodiments of the present disclosure.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "part", or "unit" used to denote elements are used only for the convenience of description of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
Example one
The embodiment of the utility model provides a power station control system, as shown in fig. 1, the power station control system includes field layer equipment, control layer equipment 2 and management layer equipment 1; the field layer equipment mainly comprises a self-contained power supply unit 3, an external power supply unit 5 and a power supply switching unit 4 which are used for forming a power station;
the self-contained power supply unit 3 and the external power supply unit 5 are respectively connected with a first input end and a second input end of the power supply switching unit 4, and an output end of the power supply switching unit 4 is used for connecting a power station load; the control layer device is respectively connected with the field layer device and the management layer device through a communication network.
The control modes of the power station control system comprise a local manual mode, an automatic mode and a remote control mode; in a local manual mode, the self-contained power supply unit is used for controlling the running state of the self-contained power supply unit according to a first control signal of a preset control unit; in an automatic mode, the control layer device is configured to generate a second control signal and send the second control signal to the self-contained power supply unit to control an operating state of the self-contained power supply unit; in the remote control mode, the control layer device is used for receiving a remote control signal of the management layer device and sending the remote control signal to the self-contained power supply unit so as to control the running state of the self-contained power supply unit;
the power supply switching unit is used for switching a power supply so that the self-contained power supply unit or the external power supply unit supplies power to the power station load.
The power supply switching unit can be a dual power supply switch ATSE and has a self-switching and self-resetting mode, a self-switching and non-self-resetting mode and a manual mode, and the manual mode can be a manual operation mode or a mode controlled by control layer equipment. The operating state of a self-contained power supply unit (self-contained power supply for short) is generally referred to herein as the operating state of the genset and auxiliary systems in the self-contained power supply unit, e.g., the start/stop state of the genset. The external power unit (external power for short) refers to an external power unit, and may be mains supply. The operation state of the external power supply unit includes a power-off state of the external power supply unit and a power supply state of the external power supply unit.
The embodiment of the utility model provides an in power station control system's response time as follows:
system real-time data transfer time: less than or equal to 1 s;
system control command response time: less than or equal to 1 s;
system linkage command response time: less than or equal to 1 s;
average switching time of menus and window pictures at all levels: less than or equal to 1 s;
screen picture switching time: less than or equal to 1 s;
simple function query response time: less than or equal to 3 s;
complex function query response time: less than or equal to 10 s.
The embodiment of the utility model provides an in power station control system reliability index as follows:
mean Time Between Failures (MTBF): not less than 2000 h;
mean time to failure (MTTR): less than or equal to 24 hours.
The power station control system in the embodiment of the utility model is in a local manual mode, so that an operator can conveniently control the power station on the site of the generator set through field layer equipment, for example, the generator set is started/stopped, and switching-off/switching-on operations are carried out on switching equipment such as a circuit breaker of the generator set; in the automatic mode, the power station is intelligently and automatically controlled, for example, the power supply path of the power station load can be switched according to the running states of the self-contained power supply unit and the external power supply unit; the power station is remotely controlled in a remote control mode through management layer equipment, so that an intelligent unattended power station control system can be realized, the reliability of the power station is improved, the informatization, scientific and standardized levels of power station management and maintenance are solved, the force allocation of attended personnel is reduced, and the response time of the power station is effectively shortened.
As shown in fig. 2, in some embodiments, the power switching unit includes a first high-voltage backup automatic switching device 401 and a low-voltage automatic transfer switch ATSE device 402; the self-contained power supply unit comprises a generator set 202 and an auxiliary system 201 linked with the generator set, wherein the auxiliary system comprises an external circulation (water) system, an oil supply system, a ventilation system, a direct current power supply system, a smoke abatement and temperature reduction device and the like. The generator set 202 comprises a high-pressure diesel generator set 2021 and a low-pressure diesel generator set 2022; the external power supply unit comprises an external power supply 301 for the high-voltage unit and an external power supply 302 for the low-voltage unit, and the external power supply 302 for the low-voltage unit is provided with a step-down transformer 303. The generator set comprises a control system, a generator and an engine.
The high-voltage generator set 2021 and the external power supply 301 for the high-voltage generator set are respectively connected to a first input end and a second input end of the first high-voltage automatic backup switching device 401, an output end of the first high-voltage automatic backup switching device 401 is connected to a substation outlet cabinet (i.e., a voltage generator set) 502, and can be connected to a high-voltage power station load;
one link of the low-voltage generator set 2022 and the step-down transformer 303 are respectively connected to a first input end and a second input end of the ATSE device 402, and an output end of the ATSE device 402 is connected to a generator set direct supply load cabinet 503, which may be divided into a power distribution box and a lighting distribution box.
That is to say, in some embodiments, the power station control system can not only meet power station loads with different power consumption requirements, but also effectively ensure the reliability of a power station with a complex structure by arranging the low-voltage power generator set and the high-voltage power generator set in the self-contained power supply unit and arranging the external power supply for the high-voltage power generator set and the external power supply for the low-voltage power generator set in the external power supply unit.
Optionally, the power switching unit further includes a second high-voltage backup power automatic switching device 403; the low-pressure diesel generator set is divided into a first link and a second link; the first link is connected with a first input end of the first high-voltage spare power automatic switching device; the second link is provided with a step-up transformer 2026; a link between the step-up transformer 2026 and the external power supply for the low-voltage unit is connected to a first input end and a second input end of the second high-voltage backup automatic switching device 403, and an output end of the second high-voltage backup automatic switching device 403 is connected to a substation outlet cabinet (for the low-voltage unit) and may be connected to a low-voltage power station load. The power demand of the power station load is further met through the step-up transformer and the pressurizing transformer, and the reliability of the power station is ensured.
In some embodiments, the generator set is provided with a machine-side controller, a circuit breaker, a contactor, an actuator and a parameter measuring device which are preset to control the unit. The actuator can receive and execute the control signal from the control layer. The circuit breaker and the contactor are used for opening/closing an output line of the generator set, protecting the diesel generator set and the like; the parameter measuring device is used for measuring electrical parameters, comprises a current/voltage transformer, a sensor and the like, and is mainly used for completing the field measurement of the electrical parameters such as current, voltage and the like.
Based on the above embodiments, a specific example is provided, the power station 10 includes a self-contained power unit 20 and an external power unit 30, wherein the self-contained power unit mainly includes a power generating set, including an auxiliary system 201 and a power generating set 202, the power generating set 202 is divided into a high-voltage power generating set 2021 and a low-voltage power generating set 2022, the high-voltage power generating set 2021 is provided with a set outlet cabinet 2023 and is connected to a high-voltage self-contained power outlet cabinet 2024, the high-voltage self-contained power outlet cabinet 2024 is connected to a first input end of a first self-contained power switching device 401, an output end of the first self-contained power switching device 401 is connected to a tap outlet cabinet (for high-voltage power generating set) 502, the low-voltage power generating set 2 is divided into two links, one of the two links 2025 is provided with the set outlet cabinet 2025 and is connected to the low-voltage self-contained power outlet cabinet 2027, the low-voltage self-contained power outlet cabinet 2027 is, the other link is provided with a step-up transformer cabinet 2026 connected with a step-up transformer 2028, the step-up transformer 2028 is provided with a step-up transformer 10KV (high voltage) outlet cabinet 2029, the step-up transformer 10KV outlet cabinet 2029 is connected with one input end of the second automatic backup power switching device (10KV)403, and the output end of the second automatic backup power switching device 403 is connected with a substation outlet cabinet (for low voltage). The external power unit is divided into an external power supply 301 for the high-voltage unit and an external power supply 302 for the low-voltage unit, the external power supply 301 for the high-voltage unit is connected with one input end of a first automatic power switching device 401, a step-down transformer 303 is arranged on one link of the external power supply 302 for the low-voltage unit, the step-down transformer 303 is connected with a voltage transformer outgoing line cabinet 301, the voltage transformer outgoing line cabinet 301 is connected with one input end of a low-voltage ATSE device 402, and the other link of the external power supply 302 for the low-voltage unit is connected with one input end of a second automatic power switching. The generator set may be a diesel generator.
Local monitoring and control are realized to field layer equipment, and including the other controller of generating set, equipment body control and control such as high-voltage board (or low-voltage board), fan, water pump and oil tank, auxiliary system has the ethernet communication function. Wherein, the auxiliary system comprises an external circulating water system, an oil supply system, a ventilation system and a smoke abatement and temperature reduction device. The external circulating water system mainly comprises a water pump, an electric valve and a self-contained control system (with a communication function); the oil supply system consists of an oil tank, a daily oil tank, a controller with a remote transmission signal, a contactor, an oil pump, a pipeline and a valve; the ventilation system mainly comprises a fan and a self-contained control system (with a communication function); the smoke-discharging silencing temp. -lowering device is formed from smoke-eliminating device and matched control system. The auxiliary system has the following functions:
1) under the remote control mode, the parallel screen control signal of the mechanism controller and the linkage signal (the transmission signal type is a passive dry contact) during the action of the unit are received, and the running function of the equipment is automatically controlled according to the signal input;
2) the Ethernet communication function is provided, and the protocol adopts a standard Modbus/TCP-IP communication protocol;
3) the parallel screen has an independent control function, and can feed back the operation of the equipment and the action signals of the related valves to the unit controller through the dry contact.
The control layer equipment comprises a unit controller, a touch device and a Programmable Logic Controller (PLC) module; the touch device is respectively connected with the unit controller and the PLC module, and the unit controller is connected with the machine-side controller, the parameter detection device and the execution mechanism. The touch device may be a device having a touch screen. The field layer equipment and the control layer equipment control the priority switching through a local/remote switch. The local switch corresponds to a local manual mode, and the remote switch corresponds to an automatic mode and a remote control mode.
In detail, the control layer device realizes control layer monitoring and control, the control layer device is composed of a generator set controller, a touch device, a switch and the like, and a PLC module is added in a complex system to assist in controlling the field layer device. The unit controller is connected with a machine side control box through a shielded cable, collects and monitors unit operation parameters, is configured with a corresponding software system to realize automatic control of the unattended power station, and is communicated with an upper computer (management layer device) to realize remote monitoring and control of the unattended power station; meanwhile, according to the interface characteristics of the field layer equipment, data are exchanged with the field layer equipment through a communication interface or an analog/digital interface of the system controller, so that the local control and monitoring of the unattended power station are realized; and simultaneously, local storage of user operation, system operation data and alarm information is realized. The touch screen provides a good human-computer interface, local monitoring of the unattended power station is achieved through Ethernet communication, and historical operation data of the system can be consulted. The LED displays the modes of operation, remote start, non-automatic position, stop, alarm, automatic operation, manual operation, stop and the like of the system.
Table 1 controlling the functionality of a layer device
The management layer device comprises a system controller; the system controller is respectively connected with the unit controller, the touch device and the PLC module through a communication network. The control layer and the management layer control the priority switching through a local/remote switch. The system controller is composed of a central monitoring computer, a router and other network equipment, and is configured with a database system and a monitoring interface, so that the remote monitoring, control and data storage of the unattended power station can be realized.
For example, the management layer device uses a computer to cooperate with related software to form a system controller, and the system controller reads corresponding data from the group controller and the PLC module through a communication interface and a field bus; for the parameters (voltage, current, frequency, running state of an auxiliary system and the like) collected by the unit controller, the system controller reads the data of the monitoring equipment through the communication interface, the switch signal input port or the analog signal input port according to the characteristics of the output signal of the monitoring equipment and the characteristics of the interface, and controls the PLC and the unit controller to act, so that the aim of controlling the action of the field layer equipment is fulfilled.
The touch device and the system controller in the control layer device can also be used for monitoring the following indexes:
1) commercial power parameters: voltage, current, frequency and power of a mains supply inlet wire end;
2) parameters of the diesel generator set: engine speed, coolant temperature, oil pressure and unit frequency;
3) parameters of the power distribution system: the voltage of an emergency bus, the output current and frequency of each unit, the current, frequency and power of each feeder line of the emergency bus, the states of each circuit breaker such as a main circuit breaker and a feeder line circuit breaker and a dual-power transfer switch ATSE;
4) auxiliary system parameters: the liquid level of the oil tank, the states of the oil supply system, the ventilation system, the smoke exhaust system and the cooling system, and the voltage and the electric quantity of the direct-current power supply system;
5) run mode (local manual/automatic/remote control mode);
6) alarm information: the method comprises the following steps of failure of opening/closing of a circuit breaker, failure of a position contact of the circuit breaker, synchronization failure of a diesel generating set, overtime of power supply parallel connection, failure of a communication system, low liquid level of an oil tank, high temperature of cooling liquid, low electric quantity of a direct-current power supply system, failure of a ventilation system and various protection actions of the diesel generating set.
The interface of the system controller has the following functions:
(1) the method has a good human-computer interface. The operation monitoring and remote control operation of the power station can be realized by utilizing a human-computer interface, a main wiring diagram and main equipment parameters of the transformer station can be monitored, and historical values and various set values can be checked.
(2) The user can inquire historical operating data and alarm information in different time periods and display the historical operating data and the alarm information in a report form and a curve form; the user can export historical operating data in an excel format; the human-computer interface can be used for realizing the editing and printing of pictures, charts and curves.
(3) The state change of important equipment in the power station can be listed as the content of event sequence recording processing, the information of the event sequence recording processing is accurate and complete, and an event recording report is generated.
(4) The user can complete the setting of the system through the interface, including the selection of the operation mode, the setting of the protective relay and the like;
(5) the interface has real-time performance on the operation of the system, and the equipment can respond to the operation of the user in time;
(6) the interface has an operation authority management function, different users are set by the system, and different operation authorities are set according to different user authorities.
(7) The system has the on-line diagnosis capability, when the system is found to be abnormal in operation, the alarm and the record are required, different sound and light alarm and picture display modes are configured, the alarm information has good visualization and sound effects, the alarm information record is required to be complete, and the retrieval is convenient; the exit and recovery of the alarm point can be confirmed; the monitoring center has the functions of fault information analysis and the like, and can collect and record protection action information, fault recording waveforms and the like of the power station.
(8) Possesses the centralized control anti-misoperation lockout function. When a central monitoring anti-misoperation locking system is configured, forced locking of remote operation of an unattended power station is realized.
The system main controller can record and store the operation of a user, the operation parameters of a system and alarm information, the time for storing data by the system main controller is not less than three months, the operation parameters of the user and the operation parameters of the system are uploaded to a management machine of a central control room, the management machine is configured with a database, the data format meets the design requirements of a database data structure and the data standard, and the time for storing data is not less than 3 years.
Wherein, can also realize its remote monitoring through the host computer of central control room. The upper computer develops monitoring software and a database, and realizes remote monitoring of the operation parameters, the operation mode and the operation state of each device of the unattended power station and inquiry of historical data by reading and storing data in the system controller; in the remote control mode, a user can change the running state of the equipment, adjust set parameters and send control signals to the system controller through the comprehensive information system through the monitoring interface, so that the remote control of the unattended power station is realized.
The embodiment of the utility model provides an in the remote data acquisition and the control of power station control system to the power station. By adopting a communication network with a bus type physical structure and adopting a Modbus RTU 485/TCP-IP data transmission protocol, the system controller can be accessed, and the running conditions of the generator set and the corollary equipment thereof can be remotely monitored. When the power station control system is in a remote control mode, the diesel generator set can be remotely controlled to start or stop. For example,
1) in the local manual control mode, an operator can start/stop the generator set and perform switching-off/switching-on operations on switching equipment such as a circuit breaker and the like through a touch screen (a preset control unit) on site;
2) in the automatic control mode, the unit controller can monitor the state of the commercial power in real time, and when the commercial power is out of power and the dual power supply changeover switch ATSE is in the automatic switching self-recovery mode and the automatic switching non-self-recovery mode, the unit controller can automatically start the diesel generator set; the units are automatically increased or decreased according to the load rate of the diesel generating set, and the diesel generating set has an automatic synchronization function when put into use; when the load rate of the diesel generating set exceeds the set load rate, automatically reducing the load according to the preset priority of the load; for the ATSE self-switching and self-resetting mode of the dual-power transfer switch, when the commercial power is recovered, the system can be automatically switched to the commercial power for supplying power, and the unit is controlled to be cooled and shut down.
3) Under the remote control mode, an operator can remotely start/stop the diesel generating set through the system controller, perform switching-off/switching-on operation on the circuit breaker and the dual-power supply changeover switch ATSE, and look up various historical operation data and alarm information. In the three modes, the starting of the diesel generating set is linked with the starting of the auxiliary system (the oil supply system, the automatic oil supplement system, the cooling system and the ventilation system), and the auxiliary system delays the stopping after the diesel generating set stops.
It should be noted that, in this document, 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 like elements in a process, method, article, or apparatus that comprises the element.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims (8)

1. A power station control system is characterized by comprising field layer equipment, control layer equipment and management layer equipment; the field layer equipment mainly comprises a self-contained power supply unit, an external power supply unit and a power supply switching unit which are used for forming a power station;
the self-contained power supply unit and the external power supply unit are respectively connected with a first input end and a second input end of the power supply switching unit, and an output end of the power supply switching unit is used for being connected with a power station load; the control layer device is respectively connected with the field layer device and the management layer device through a communication network.
2. The plant control system of claim 1, wherein the power switching unit includes a first high-voltage backup auto-switching device and a low-voltage Automatic Transfer Switch (ATSE) device; the self-contained power supply unit comprises a generator set and an auxiliary system linked with the generator set, and the generator set comprises a high-voltage generator set and a low-voltage generator set; the external power unit comprises an external power supply for the high-voltage unit and an external power supply for the low-voltage unit, and the external power supply for the low-voltage unit is provided with a step-down transformer;
the high-voltage generator set and the external power supply for the high-voltage generator set are respectively connected with a first input end and a second input end of the first high-voltage automatic backup switching device, and an output end of the first high-voltage automatic backup switching device is connected with a substation outlet cabinet for the high-voltage generator set;
the low-voltage generator set and the step-down transformer are respectively connected with a first input end and a second input end of the ATSE device, and an output end of the ATSE device is connected with a direct-supply load cabinet of the generator set.
3. The plant control system of claim 2, wherein the power switching unit further comprises a second high-voltage backup automatic switching device; the low-voltage generator set is divided into a first link and a second link; the first link is connected with a first input end of the first high-voltage spare power automatic switching device; the second link is provided with a boosting transformer; the step-up transformer and the external power supply for the low-voltage unit are respectively connected with a first input end and a second input end of the second high-voltage automatic switching device, and an output end of the second high-voltage automatic switching device is connected with a substation outlet cabinet for the low-voltage unit.
4. The plant control system according to claim 2, characterized in that the generator set is provided with a machine side controller of a preset operating unit, a circuit breaker, an actuator and a parameter measuring device.
5. The plant control system of claim 2, characterized in that the auxiliary systems comprise an external water circulation system, an oil supply system, a ventilation system and a smoke abatement cooling device.
6. The plant control system according to claim 4, characterized in that the control layer equipment comprises a machine group controller, which is connected with the machine side controller, the parameter detection device and the actuator via a communication network.
7. The plant control system of claim 6, wherein the control layer equipment further comprises a touch device and a Programmable Logic Controller (PLC) module; the touch device is respectively connected with the unit controller and the PLC module.
8. The plant control system of claim 7, characterized in that the management layer equipment comprises a system controller; the system controller is respectively connected with the unit controller, the touch device and the PLC module through a communication network.
CN202021290421.XU 2020-07-03 2020-07-03 Power station control system Active CN212231173U (en)

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