CN207442464U - A kind of generator off-the-line load reduction control system of industrial power plant - Google Patents
A kind of generator off-the-line load reduction control system of industrial power plant Download PDFInfo
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- CN207442464U CN207442464U CN201721384967.XU CN201721384967U CN207442464U CN 207442464 U CN207442464 U CN 207442464U CN 201721384967 U CN201721384967 U CN 201721384967U CN 207442464 U CN207442464 U CN 207442464U
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems 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
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Y—GENERAL 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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Abstract
A kind of generator off-the-line load reduction control system the utility model discloses industrial power plant includes PLC controller, the PLC controller signal input part receives the signals such as signal condition, frequency relay, the voltage relay of various switches, control circuit in PLC controller carries out accurate judgement failure, realize generator and external power grid system sectionalizing and independent operating, and part power load is cut to keep generator independent operating electric voltage frequency is qualified to stablize, to realize the purpose for reducing power failure range and ensureing enterprise's continuous production and security.The problem of existing off-the-line load-shedding equipment of the utility model solution is complicated expensive, and is suitable for the big system of large-sized unit more, and logical relation cures, and User Exploitation permission is small, underaction.
Description
Technical field
The utility model is related to a kind of generator off-the-line load reduction control systems, and more particularly to high power consumption, production is continuous, supplies
The off-the-line load reduction control system of the house generator of the high large enterprise of electric safety requirements.
Background technology
As technological innovation and energy-saving and emission-reduction are carried out energetically by country, for the large-size chemical of high power consumption, steel, smelt and look forward to
Industry, economize on electricity is as one of strategy of energy-saving and emission-reduction, therefore power-saving technique is increasingly paid attention to be subject to enterprise.In these large enterprises
All there is respective boiler and steam power system, different pressures, the steam of temperature are needed according to different purposes, and utilize
Pressure and temperature reducing station, cogeneration are the apparent power-saving measures of energy-saving effect for enterprise, and provide emergency power supply.
When enterprise is using pressure and temperature reducing station, cogeneration, the generator power of the assembling unit is relatively small, and performance is unstable, nothing
Method is individually for enterprise and provides reliably electric energy supply, therefore generator must be incorporated into the power networks with power grid.For there is house generator
The Enterprise Power System being incorporated into the power networks, once external power grid failure dead electricity, if emergency generator's unit cannot in time with external power grid off-the-line
And part power load is cut, unit will jump vehicle because of the reasons such as overcurrent, overload, under-frequency, under-voltage, be unable to operate normally.It is existing
Possess the device of automatic parallel off off-load, it is complicated expensive, and it is suitable for the big system of large-sized unit more, logical relation is solid
Change, User Exploitation permission is small, underaction.
It, can it is therefore desirable to provide a kind of off-the-line load reduction control system of enterprise's house generator based on general PLC
For possessing the electricity consumption enterprise of emergency generator's unit, principle is simple, flexible design is convenient, and maintenance cost is low.
The content of the invention
The utility model solves the deficiencies in the prior art, provides a kind of change for being used to be furnished with house generator unit
The generator off-the-line load reduction control system of the industrial power plant of the large size power consumption such as work, smelting, steel enterprise.
Used technical solution is the utility model to achieve these goals：
The generator off-the-line load reduction control system of industrial power plant a kind of includes PLC controller, the PLC controller letter
Number input terminal is connected with the grid-connected switching signal state of house generator, step-down transformer load side on off state, step-down transformer
Source-side switches state, substation busbars frequency relay, substation busbars voltage relay, electric substation's bus connection switch, decompression
Transformer load side power relay, enterprise's house generator protection signal, PLC controller signal output part are connected with no less than
Two off-the-line circuits and off-load circuit, the PLC controller are also associated with PLC input and output expansion cards；The PLC controller bag
Control circuit is included, the control circuit includes under-voltage under-frequency or overload circuit, outer net dead electricity solution column circuits, jumps off-the-line electricity certainly
Road, enterprise's house generator overload off-load circuit, enterprise's house generator FM circuit.The PLC controller signal input
End receives the signals such as signal condition, frequency relay, the voltage relay of various switches, the control electricity in PLC controller
Road carries out accurate judgement failure, realizes generator and external power grid system sectionalizing and independent operating, and cut part power load with
Keep generator independent operating electric voltage frequency is qualified to stablize, to realize that reducing power failure range ensures enterprise's continuous production and safety
The purpose of property.
The under-voltage under-frequency or overload circuit include busbar voltage relay, busbar underfrequency relay, enterprise from preparation
Motor over power relay, the busbar voltage relay normally open node, the normally opened node of busbar frequency relay, enterprise are from preparation
The normally opened node logical of motor over power relay or afterwards output under-frequency are under-voltage or overload signal.The under-voltage under-frequency or overload
Circuit is by choosing the voltage value of busbar, the load value of busbar frequency values and enterprise's house generator and corresponding relay setting value
Rear control bus voltage relay, busbar frequency relay, enterprise's house generator over power relay is compared to provide and close
It closes and disconnects actuating signal, and any of which signal is beyond setting value, then can export that under-frequency is under-voltage or overload signal.
The outer net dead electricity solution column circuits include step-down transformer load side switch and aid in normally opened node, house generator simultaneously
Net switch aids in normally opened node, the normally opened node of electric substation's bus connection switch auxiliary, electric substation's under-frequency is under-voltage and and enterprise emergency generator
The normally opened node of machine over power relay, the normally opened node of main transformer power direction relay, first time relay, downconverter
Device source-side switches aid in normally closed node, reducing transformer transformer load side switch to aid in normally closed node, and the step-down transformer is born
Lotus side switch aids in the grid-connected switch of normally closed node, house generator that normally opened node, electric substation's bus connection switch is aided in aid in normally opened section
Point, electric substation's under-frequency is under-voltage and the normally opened node of enterprise's house generator over power relay, main transformer power direction relay
It is connected after normally opened node series connection with first time relay triggering end, first time relay output end respectively drives multiple outputs
Intermediate relay, the opened point for exporting intermediate relay is respectively connected to step-down transformer source-side switches, reducing transformer transformer is born
One of condition as switch trip of trip(ping) circuit of lotus side switch and access comprehensive automation system of transformer substation as enterprise oneself
The signal alarm of preparation motor off-the-line.Enterprise's house generator overload 1# machines overload or power transformation are detected in PLC controller
Institute's busbar under-frequency, under-voltage, main transformer power output（Power falls to be sent into 110kV systems）, and step-down transformer load side is opened
When closing position, PLC controller judges that accident for external power grid dead electricity, is prolonged for pass, electric substation's bus connection switch, the grid-connected switch of house generator
When 0.5 second after disconnect rapidly step-down transformer source-side switches and step-down transformer load side switch, make enterprise's house generator
With system sectionalizing independent operating.
It is described to include that step-down transformer load side switch aids in normally closed node, house generator is grid-connected opens from jumping solution column circuits
It closes and aids in normally opened node, electric substation's bus connection switch that normally opened node, Backup Power Switch is aided in aid in normally closed node, enterprise from preparation
The normally opened node of motor off-the-line signal relay, the step-down transformer load side switch aid in normally closed node logical or upper enterprise certainly
The grid-connected switch of preparation motor off-the-line signal relay normal opened contact, house generator aids in normally opened node, electric substation's bus connection switch
Normally opened node, Backup Power Switch is aided in aid in normally closed node logical and rear output buck transformer off-load I signal and enterprise respectively
Industry house generator independent operating signal.
Enterprise's house generator overload off-load circuit includes that enterprise's house generator over power relay is normally opened connects
Point, step-down transformer off-load I signal relay normally open contact, step-down transformer off-load II signal relays normal opened contact, second
The time relay, enterprise's house generator over power relay normal opened contact and step-down transformer off-load I signal relay
Start second time relay after normal opened contact logical AND and start timing, the second time relay timing to normal opened contact is closed defeated
Go out step-down transformer off-load II signals；The step-down transformer off-load I signal relay exports 15 nodes and corresponds to 15 off-loads
Circuit, step-down transformer off-load II signal relays export 6 nodes and correspond to 6 off-load circuits.Enterprise's house generator is independent
Operation, can not undertake all power loads of main transformer, 15 6kV transmission line circuits of first off-load, after first off-load if
1# generators are powered still in overload state, 6 6kV transmission line circuits of off-load second batch load with ensureing that entire main transformer becomes
The safety of system.
Enterprise's house generator FM circuit includes step-down transformer load side switch and aids in normally closed node, standby electricity
Source switch aids in the grid-connected switch of normally closed node, enterprise's house generator to aid in normally opened node, electric substation's bus connection switch auxiliary normally closed
Node, electric substation's bus connection switch aids in normally closed node and step-down transformer load side switch aid in normally closed node logical or
Afterwards, Backup Power Switch aids in the grid-connected switch of normally closed node, house generator to aid in normally opened node on logical AND, after condition possesses
Enterprise's house generator frequency modulation enabling signal and enterprise's house generator frequency modulation alarm signal, enterprise's house generator are exported respectively
Unit is changed into FREQUENCY CONTROL pattern by load control mode.
The utility model is simple in structure to be understood, when the Enterprise Power System with emergency generator's unit runs into external power grid dead electricity
In the case of failure, PLC control system receives protection equipment for generator, power direction relay, frequency relay, voltage relay
The signal that device transmits carries out accurate judgement failure according to the program that sets, realizes generator and external power grid system sectionalizing and only
Vertical operation, and part power load is cut to keep generator independent operating electric voltage frequency is qualified to stablize, had a power failure with realizing to reduce
Scope ensures the purpose of enterprise's continuous production and security.
Description of the drawings
The utility model is further described referring now to attached drawing, wherein：
Fig. 1 is the utility model device structure diagram.
Fig. 2 is the simple logic relation of each signal of off-the-line unloading system.
Fig. 3 is PLC controller control circuit schematic diagram.
Reference sign：A sections under-voltage：Busbar voltage relay, A sections of under-frequency：Busbar frequency relay, 1# machines are excessively negative
Lotus：Enterprise's house generator over power relay, 602 working positions：The normally opened node of step-down transformer load side switch auxiliary, 701
Working position：The grid-connected switch of house generator aids in normally opened node, 790 working positions：Electric substation's bus connection switch aids in normally opened node, 2#
Power output：The normally opened node of main transformer power direction relay, TIM050：First time relay, 102TJ：Downconverter
Device source-side switches aid in normally closed node, 602TJ：Step-down transformer load side switch aids in normally closed node, 1# machine off-the-lines：Enterprise
House generator off-the-line signal relay normal opened contact, 602 inoperative positions：Step-down transformer load side switch aids in normally closed section
Point, 790 inoperative positions：Electric substation's bus connection switch aids in normally closed node, 611 inoperative positions：Backup Power Switch aids in normally closed section
Point, 701 switches：The grid-connected switch of house generator, TIM051：Second time relay, 02 becomes off-load I：Electric substation off-load I believes
Number switch, 02 off-load II：Electric substation's off-load II signaling switches, 1# machine independent operatings：Enterprise's house generator independent operating signal,
1# machines frequency modulation starts：Enterprise's house generator frequency modulation enabling signal output terminal, 1# machines frequency modulation start（Alarm）Enterprise emergency generator
Machine frequency modulation alarm signal output ends.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model part of the embodiment, instead of all the embodiments.Based on the embodiment in the utility model, sheet
Field those of ordinary skill all other embodiments obtained without making creative work, belong to this practicality
Novel protected scope.
As shown in Figures 1 to 3, the generator off-the-line load reduction control system of industrial power plant a kind of includes PLC controller, institute
It states PLC controller signal input part and is connected with the grid-connected switching signal state of house generator, step-down transformer load side switch shape
State, step-down transformer source-side switches state, substation busbars frequency relay, substation busbars voltage relay, electric substation
Bus connection switch, step-down transformer load side power relay, enterprise's house generator protection signal, PLC controller signal output
End is connected with no less than two off-the-line circuits and off-load circuit, and the PLC controller is also associated with PLC input and output expansion cards；
The PLC controller includes control circuit, and the control circuit includes under-voltage under-frequency or overload circuit, outer net dead electricity off-the-line electricity
Road solves column circuits, enterprise's house generator overload off-load circuit, enterprise's house generator FM circuit from jump.The PLC controls
Device signal input part processed receives the signals such as signal condition, frequency relay, the voltage relay of various switches, is controlled according to PLC
Control circuit in device carries out accurate judgement failure, realizes generator and external power grid system sectionalizing and independent operating, and cuts portion
Point power load is to keep generator independent operating electric voltage frequency is qualified to stablize, to realize that reducing power failure range ensures enterprise's production
The purpose of continuity and security.
The under-voltage under-frequency or overload circuit include that A section of busbar voltage relay is under-voltage, A sections of busbar frequency relay is deficient
Frequently, enterprise's house generator over power relay 1# machine overloads, A sections of the busbar voltage relay is under-voltage, busbar frequency after
It is under-voltage or excessively negative that under-frequency is exported between A sections of under-frequency of electric appliance, enterprise's house generator over power relay 1# machine overloads after parallel connection
Lotus signal.The under-voltage under-frequency or overload circuit are by taking the voltage value, busbar frequency values and enterprise's house generator of busbar
Load value compared with corresponding relay setting value rear control bus voltage relay, busbar frequency relay, enterprise
House generator over power relay, which provides, is closed and disconnects actuating signal, and any of which signal exceeds setting value, then can be defeated
Go out that under-frequency is under-voltage or overload signal.
The outer net dead electricity solution column circuits are grid-connected including 602 switch position of step-down transformer load side, house generator
701 switch positions, 790 switch position of electric substation's mother, electric substation's under-frequency is under-voltage and and enterprise's house generator overload
Relay normally open node, main transformer load side power direction relay reverse-power tripping output node, first time relay
TIM050,102 switch trip relay of step-down transformer mains side, 602 switch trip relay of reducing transformer transformer load side,
The 602 switch position of step-down transformer load side relay, house generator are grid-connected after 701 switch positions, electric substation
790 switch position of mother, electric substation's under-frequency is under-voltage and the normally opened node of enterprise's house generator over power relay, main transformer
Start first time relay TIM050 after work(power direction relay reverse-power tripping output node logical AND and start timing, the
One time relay TIM050 timing 0.5 second to rear 102 switch trip relay of start signal output step-down transformer mains side,
The signal alarm 1# machine solution column signals of 602 switch trip relay of reducing transformer transformer load side, enterprise's house generator off-the-line
Relay.Enterprise's house generator overload 1# machines overload or substation busbars under-frequency, under-voltage are detected in PLC controller,
Main transformer power output switchs（Power falls to be sent into 110kV systems）, and step-down transformer load side switch, electric substation's mother
For the grid-connected switch of switch, house generator when closing position, PLC controller judges accident for external power grid dead electricity, rapid after being delayed 0.5 second
The step-down transformer source-side switches of main transformer both sides and step-down transformer load side switch are disconnected, makes enterprise's house generator
With system sectionalizing independent operating.
It is described to include the switch inoperative of step-down transformer load side relay 602 position, house generator from jump solution column circuits
Grid-connected 701 switch position, 790 switch position of electric substation's mother, stand-by power supply 611 switch inoperative position, enterprise from preparation
Motor solution column signal 1# machine off-the-lines, the step-down transformer load side 602 switchs inoperative position, house generator grid-connected 701 is opened
Distinguish output buck after closing working position, 790 switch position of electric substation's mother, the switch inoperative of stand-by power supply 611 position logical AND
Transformer off-load I signal 02 becomes off-load I and enterprise's house generator independent operating signal 1# machine independent operatings, the downconverter
Device load side 602 switchs inoperative position logic or upper enterprise's house generator solution column signal 1# machines off-the-line, house generator are grid-connected
602 switch positions, 790 switch position of electric substation's mother, stand-by power supply 611 switch inoperative to be exported respectively after logical AND
It is depressured 2# main transformer off-load I signals and enterprise's house generator independent operating signal.
Enterprise's house generator overload off-load circuit includes enterprise's house generator over power relay 1# machine mistakes
Load, step-down transformer off-load I signal 02 become off-load I, step-down transformer off-load II signals 02 become off-load II, the second time relay
Device TIM051, enterprise's house generator over power relay 1# machines overload and step-down transformer off-load I signal 02# changes subtract
Start the second time relay TIM051 after load I logical ANDs and start timing, after the second time relay TIM051 timing is arrived for 0.5 second
Output buck transformer off-load II signals 02 become off-load II；The reducing transformer off-load I signal 02 becomes the output of off-load I signal relay
15 nodes correspond to 15 off-load circuits, and step-down transformer off-load II signals 02 become off-load II signal relays and export 6 nodes
Corresponding 6 off-load circuits.Enterprise's house generator independent operating can not undertake all power loads of main transformer, first subtracts
15 6kV transmission line circuits are carried, if 1# generators are still in overload state, off-load second batch load 6 after first off-load
6kV transmission line circuits are to ensure that entire main transformer becomes the safety of electric power system.
Enterprise's house generator FM circuit includes step-down transformer load side 602 and switchs inoperative position, standby electricity
Source 611 switchs inoperative position, the grid-connected 701 switch position of enterprise's house generator, the switch inoperative of electric substation's mother 790 position,
Electric substation's mother 790 switchs inoperative position and step-down transformer load side 602 switch inoperative position logic or after, logical AND
Upper stand-by power supply 611 switchs inoperative position, the grid-connected 701 switch position of house generator, and condition exports enterprise respectively after possessing
House generator 1# machine frequency modulation enabling signals and enterprise's house generator 1# machine frequency modulation alarm signals, enterprise's house generator unit
FREQUENCY CONTROL pattern is changed by load control mode.
The operation principle of the utility model is as follows：
Enterprise's house generator overload 1# machines overload or electric substation I sections of busbar under-frequency are detected in PLC controller, is owed
Pressure, main transformer power output 2# main transformer power outputs（Power falls to be sent into 110kV systems）, and step-down transformer load side is opened
The grid-connected switch 701 of 602, electric substation's bus connection switch 790, house generator is closed when closing position, PLC controller judges accident for dispatch from foreign news agency
Net dead electricity, delay disconnect rapidly the step-down transformer source-side switches 102 and step-down transformer of 2# main transformers both sides after 0.5 second
Load side switch 602, makes enterprise's house generator 1# machines and system sectionalizing independent operating.Enterprise's house generator 1# machines are independently transported
Row, can not undertake all power loads of main transformer 02#, 15 6kV transmission line circuits of first off-load, after first off-load if
1# generators are still in overload state, and 6 6kV transmission line circuits of off-load second batch load are to ensure that entire main transformer 02# becomes
The safety of electric power system.
Above disclosed is only the preferred embodiment of the utility model, certainly cannot be new to limit this practicality with this
The interest field of type, therefore the equivalent variations made according to present utility model application the scope of the claims still belong to the utility model and are covered
Scope.It should be appreciated that above description be intended to it is illustrative and not limiting.For example, above-described embodiment (and/or its aspect) can
With in combination with one another.In addition, enlightenment according to the present utility model, which can make many remodeling, is suitable for specific situation or material
Material is without departing from the scope of the utility model.By reading foregoing description, in scope and spirit of the claims it is many its
Its embodiment and remodeling it will be apparent to those skilled in the art that.
Claims (6)
1. the generator off-the-line load reduction control system of a kind of industrial power plant, which is characterized in that described including PLC controller
PLC controller signal input part be connected with the grid-connected switching signal state of house generator, step-down transformer load side on off state,
Step-down transformer source-side switches state, substation busbars frequency relay, substation busbars voltage relay, electric substation's mother
Switch, step-down transformer load side power relay, enterprise's house generator protection signal, PLC controller signal output part connect
No less than two off-the-line circuits and off-load circuit are connected to, the PLC controller is also associated with PLC input and output expansion cards；It is described
PLC controller includes control circuit, the control circuit include under-voltage under-frequency or overload circuit, outer net dead electricity solution column circuits,
Column circuits, enterprise's house generator overload off-load circuit, enterprise's house generator FM circuit are solved from jumping.
2. the generator off-the-line load reduction control system of industrial power plant according to claim 1, which is characterized in that described
Under-voltage under-frequency or overload circuit include busbar voltage relay, busbar underfrequency relay, enterprise's house generator overload after
Electric appliance, the busbar voltage relay normally open node, the normally opened node of busbar frequency relay, enterprise's house generator overload after
The normally opened node logical of electric appliance or afterwards output under-frequency are under-voltage or overload signal.
3. the generator off-the-line load reduction control system of industrial power plant according to claim 1, which is characterized in that described
Outer net dead electricity solution column circuits include step-down transformer load side switch and aid in the grid-connected switch auxiliary of normally opened node, house generator normal
Open node, electric substation's bus connection switch aids in normally opened node, electric substation's under-frequency is under-voltage and and enterprise's house generator overload relay
The normally opened node of device, the normally opened node of main transformer power direction relay, first time relay, step-down transformer source-side switches
Normally closed node, reducing transformer transformer load side switch is aided in aid in normally closed node, the step-down transformer load side switch auxiliary
The grid-connected switch of normally closed node, house generator aids in normally opened node, electric substation's bus connection switch to aid in normally opened node, electric substation's under-frequency
After the normally opened node series connection of under-voltage and the normally opened node of enterprise's house generator over power relay, main transformer power direction relay
It is connected with first time relay triggering end, first time relay output end respectively drives multiple output intermediate relays, defeated
The opened point for going out intermediate relay is respectively connected to the tripping of step-down transformer source-side switches, reducing transformer transformer load side switch
One of the condition of circuit as switch trip and access comprehensive automation system of transformer substation are as enterprise's house generator off-the-line
Signal alarm.
4. the generator off-the-line load reduction control system of industrial power plant according to claim 1, which is characterized in that described
From jumping, solution column circuits include the normally closed node of step-down transformer load side switch auxiliary, the grid-connected switch of house generator aids in normally opened section
Point, electric substation's bus connection switch aid in normally opened node, Backup Power Switch to aid in normally closed node, enterprise's house generator solution column signal
Relay normally open node, the step-down transformer load side switch aid in normally closed node logical or upper enterprise's house generator off-the-line
The grid-connected switch of signal relay normal opened contact, house generator aid in normally opened node, electric substation's bus connection switch aid in normally opened node,
Backup Power Switch aids in normally closed node logical and rear output buck transformer off-load I signal and enterprise's house generator respectively only
Vertical run signal.
5. the generator off-the-line load reduction control system of industrial power plant according to claim 1, which is characterized in that described
Enterprise's house generator overload off-load circuit includes enterprise's house generator over power relay normal opened contact, step-down transformer
Off-load I signal relay normally open contact, step-down transformer off-load II signal relays normal opened contact, second time relay, institute
State enterprise's house generator over power relay normal opened contact and step-down transformer off-load I signal relay normally open contact logical AND
After start second time relay and start timing, the second time relay timing to normal opened contact is closed output buck transformer and subtracts
Carry II signals；The step-down transformer off-load I signal relay exports 15 nodes and corresponds to 15 off-load circuits, step-down transformer
Off-load II signal relays export 6 nodes and correspond to 6 off-load circuits.
6. the generator off-the-line load reduction control system of industrial power plant according to claim 1, which is characterized in that described
Enterprise's house generator FM circuit includes step-down transformer load side switch and aids in normally closed node, Backup Power Switch auxiliary normal
The grid-connected switch of close node, enterprise's house generator aids in normally opened node, electric substation's bus connection switch to aid in normally closed node, the power transformation
Institute bus connection switch aids in normally closed node and step-down transformer load side switch aid in normally closed node logical or after, it is spare on logical AND
Power switch aids in the grid-connected switch of normally closed node, house generator to aid in normally opened node, and condition exports enterprise certainly respectively after possessing
Preparation motor frequency modulation enabling signal and enterprise's house generator frequency modulation alarm signal, enterprise's house generator unit is by spatial load forecasting
Mode change is FREQUENCY CONTROL pattern.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721384967.XU CN207442464U (en) | 2017-10-25 | 2017-10-25 | A kind of generator off-the-line load reduction control system of industrial power plant |
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| CN201721384967.XU CN207442464U (en) | 2017-10-25 | 2017-10-25 | A kind of generator off-the-line load reduction control system of industrial power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112838615A (en) * | 2021-01-05 | 2021-05-25 | 中国神华能源股份有限公司国华电力分公司 | Control system for splitting generator set |
| CN113572153A (en) * | 2021-06-25 | 2021-10-29 | 中广核工程有限公司 | Method, device, equipment and system for processing frequency fault of external power grid of nuclear power station |
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2017
- 2017-10-25 CN CN201721384967.XU patent/CN207442464U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838615A (en) * | 2021-01-05 | 2021-05-25 | 中国神华能源股份有限公司国华电力分公司 | Control system for splitting generator set |
| CN113572153A (en) * | 2021-06-25 | 2021-10-29 | 中广核工程有限公司 | Method, device, equipment and system for processing frequency fault of external power grid of nuclear power station |
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