CN202856449U - Low-frequency self-startup system for set - Google Patents
Low-frequency self-startup system for set Download PDFInfo
- Publication number
- CN202856449U CN202856449U CN 201220510222 CN201220510222U CN202856449U CN 202856449 U CN202856449 U CN 202856449U CN 201220510222 CN201220510222 CN 201220510222 CN 201220510222 U CN201220510222 U CN 201220510222U CN 202856449 U CN202856449 U CN 202856449U
- Authority
- CN
- China
- Prior art keywords
- low
- self
- unit
- starting
- plc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000012544 monitoring process Methods 0.000 claims abstract description 28
- 238000004891 communication Methods 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims description 7
- 238000013500 data storage Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 239000010981 turquoise Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000009329 sexual behaviour Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model relates to the technical field of a low-frequency self-startup system for a set and is an improvement to emergency automatic control technology of a generator set of an electric power system so as to ensure stabilization of an electrical network. According to the utility model, communication path redundancy configuration of important equipment is composed of an on-site monitoring and controlling element, a PLC, a host computer server, an operator station and related network equipment; the low-frequency self-startup system is developed based on a computer monitoring system of a power plant and has the advantages of need for a small amount of investment, low coupling with other control logic, sensitive and reliable motion, comprehensive and simple arrangement of parameters and good versatility; the low-frequency self-startup system can be perfectly combined with an automatic generating controlling system in the traditional power plant, takes effective measures to avoid the problem of mutual conflict between low-cycle self-startup control motion and control logic of the automatic generating controlling system and provides effective guarantee for dealing with emergency accidents in particular cases in the power plant.
Description
Technical field
The utility model relates to a kind of technical field of unit low frequency self-starting system, is for ensureing that the stabilization of power grids is for the improvement of the urgent automatic control technology of electric power system generating set.
Background technology
Low all self-starting devices are maintenance system frequency stabilizations and setting, under accident conditions, electric power system loses a large amount of power supplys causes power that serious imbalance occurs and system frequency sharply descends, to cause a series of serious consequence and loss to the electricity consumption user, in this case, low all self-starting device actions, drop into unit for subsequent use, increase system power, with the systems stabilisation frequency, ensure the quality of power supply.Development along with electric power system, the continuous growth of net capacity, society is more and more higher to the requirement of the quality of power supply, significantly reduce when system's unit output occurring, in the lower situation of mains frequency, the unit primary frequency modulation might not satisfy the stable needs of system frequency, and in general the adjustable range of unit primary frequency modulation is 10% of its rated capacity.As a kind of processing method to system burst sexual behavior part, the power plant unit improves the stability of electric power system in the serious immediately self-starting systems stabilisation preferably during low week of system.From technological layer, utilize existing computer supervisory control system can realize preferably unit self-starting during low week in system in the hydroelectric plant.
Summary of the invention
In order to solve the deficiencies in the prior art part, the utility model provides a kind of unit low frequency self-starting system, its objective is and to combine by automatic electricity generation control system perfect and existing power plant, use effective means to avoid mutually conflicting with the automatic electricity generation control system control logic behind low all self-starting control actions.
The utility model is achieved through the following technical solutions:
Unit low frequency self-starting system at hardware aspect, is made of the communication path redundant configuration of visual plant terrain Monitoring and Controlling element, PLC, host computer server, operator station and related network device; The terrain slave computer is bus structures, and terrain Monitoring and Controlling element and PLC equipment interconnect by the MB+ network; The host computer network is star-shaped network structure, and PLC, host computer server, operator station all interconnect by optical fiber or twisted-pair feeder;
Grid Ethernet is main communication media, and equipment component is by serial communication, and network configuration is the layer distributed structure, and the core of the superiors is that computer server is responsible for processing comparatively complicated problem such as data storage and processing, complex logic computing; The intermediate layer is slave computer PLC control unit; Terrain Monitoring and Controlling element is the execution unit of bottom; Thereby combined with slave computer PLC control unit by computer supervisory control system and to have realized a kind of comparatively general and AGC and the automatic low all self-starting modes of variable element that match of startup-shutdown strategy.
Advantage and beneficial effect: the utility model relies on power plant's computer supervisory control system to realize, invest littlely, and low with other control logic couplings, it is reliable to be active in one's movements, and parameter arranges comprehensively simply, and versatility is stronger.Can combine by automatic electricity generation control system perfect and existing power plant simultaneously, use effective means to avoid behind low all self-starting control actions and the conflicting problem of automatic electricity generation control system control logic, processing for power plant's emergency episode under special circumstances provides effective guarantee.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further to describe in detail.
Fig. 1 is the utility model system state monitoring flow chart;
Fig. 2 is the utility model unit self-starting flow chart.
Embodiment
The utility model is a kind of unit low frequency self-starting system, utilizes computer supervisory control system to combine with slave computer PLC control unit and has realized a kind of comparatively general low all self-starting modes of variable element that match with AGC and automatic startup-shutdown strategy.
Unit low frequency self-starting system is made of the communication path redundant configuration safeguards system reliability of visual plant at hardware aspect terrain Monitoring and Controlling element, PLC, host computer server, operator station and related network device.
Grid Ethernet is main communication media, and equipment component is by serial communication, and network configuration is the layer distributed structure, and the core of the superiors is that computer server is responsible for processing comparatively complicated problem such as data storage and processing, complex logic computing etc.; The chief leading cadre of operator station machine interactive function; The intermediate layer is slave computer PLC control unit, mainly is responsible for data relay, sequential control, reaches urgent interrupt response; Terrain Monitoring and Controlling element is the execution unit of bottom.Thereby combined with slave computer PLC control unit by computer supervisory control system and to have realized a kind of comparatively general and AGC and the automatic low all self-starting modes of variable element that match of startup-shutdown strategy.
Major function of the present utility model is as follows:
1, after unit low frequency self-starting system frequency is lower than the setpoint frequency certain hour, automatically starts and specify low all self-starting units;
2, according to unit low frequency self-starting system demand, can independently set low all self-starting frequencies and unit starting time of delay;
3, when power plant has many units to possess as low all self-starting machine set conditions, can specify unit as low all self-starting units;
4, when there are many outlets in power plant, can specify to monitor that specific outlet frequency is as low all self-startings condition of setting out;
5, can with AGC and the perfect cooperation of the automatic startup-shutdown of unit system;
6, after unit low frequency self-starting system triggers low all self-starting functions, when starting the self-starting unit, send alarm signal and remind the operations staff to carry out corresponding accident treatment.
Concrete function is described below:
1, monitoring image
The monitoring image of unit low frequency self-starting system low frequency self-starting is integrated in the power of the assembling unit control desk picture state that arranges of display system low frequency self-starting.When showing the machine group number, represent that current this unit is set as low frequency self-starting unit, represent that when showing " excision " system does not set low all self-starting units.In the state information left side " setting " button is arranged, click keys can enter system's low frequency self-starting picture is set.
2, parameter setting
Enter after the self-starting of unit low frequency self-starting system low frequency arranges picture, for each unit is provided with a parameter form is set in the picture.Form divides two parts: data show, the parameter setting.
Wherein the data demonstration comprises following content:
(1) circuit picks up: expression unit low frequency self-starting system is monitoring that circuit now.Hill, Shuan Gou power station monitor the 220kV circuit.And the Shi Long power station monitors the turquoise A-wire at the circuit breaker of turquoise A-wire, the first and second isolation switchs during all in the position of closing, and monitors turquoise second line in other situations;
(2) line frequency: show the system frequency of the circuit that monitors, be accurate to 2 decimals, unit is Hz;
(3) line voltage distribution: show the system voltage of the circuit that monitors, being shown to 2 decimal units is kV;
(4) set state: present current set state is respectively: stand-by state, Light Condition, idling conditions, generating state, five states of not stationary state.
Wherein the parameter setting comprises following content:
(1) low all self-startings (dropping into/withdraw from): whether what set this TV station unit is low all self-starting units.Being that other units of same power station withdraw from low all self-starting functions automatically when a unit is set to low all self-starting units, is that low all self-starting functions are withdrawed from the power station automatically when all units of same power station all withdraw from low all self-starting functions.
(2) frequency setting: the trigger rate that unit low frequency self-starting action is set.Be accurate to 2 of decimal points, unit is Hz, and scope is 0-50, default value 49.25Hz;
(3) delay time: after line frequency continues to be lower than setpoint frequency and reaches the duration that delay time sets, unit will start automatically.Be accurate to integer-bit, the S of unit, scope 0-100, default value 5S;
(4) load is given: after the self-starting of unit low frequency is set, and automatically given burden with power.Be accurate to integer-bit, the MW of unit, scope 0-full load, default value is at full capacity.
3, fault alarm
When unit satisfies system's low frequency self-starting condition, and when automatically starting.Supervisory control system will be sent failure alarm signal when sending the start order, alarm signal can be inquired about in electric fault.
Function of the present utility model is achieved as follows:
1, system state monitoring flow process.
As shown in Figure 1, after unit low frequency self-starting system drops into low all self-starting control, the system state monitoring flow process will be enabled in running background cycle monitoring system state automatically, and idiographic flow is as follows:
(1) take 1 second as a monitoring periods, system monitoring flow process per second automatic monitoring system state;
(2) monitoring system frequency at first, if system frequency too low (＜48Hz) then be judged to be system blackout maintenance or sensor fault, this monitoring is skipped in counter O reset;
(3) if system frequency is lower than the setpoint frequency lower bound, carry out next step monitoring, otherwise this monitoring end, next monitoring periods is waited in counter O reset;
(4) if system voltage excessively low (＜44kV) decision-making system is in the interruption maintenance state, finishes this monitoring, next monitoring periods is waited in counter O reset;
(5) satisfy frequency and voltage triggered condition, counter+1;
(6) if counter values greater than low all delay times of setting, carry out next step operation, otherwise wait for next monitoring periods;
(7) if unit is set as low all self-starting units and is in stand-by state then starts unit, otherwise continue to wait for.
2, unit self-starting flow process.
As shown in Figure 2, when satisfying unit low frequency self-starting system low frequency self-starting condition, set unit and will enter unit self-starting flow process, idiographic flow is as follows:
(1) sends alarm signal and remind the low all self-starting actions of operations staff;
(2) owing to full factory deferrable load after the unit self-starting will change, if system drops into AGC and automatic startup-shutdown control may cause the automatic startup-shutdown of unit system moving, control so at first will withdraw from the automatic startup-shutdown of all controlled units after low all self-starting actions;
(3) send the start order, enter unit Auto Power On flow process;
(4) cycle criterion set state after unit enters the generating attitude, is automatic power regulation with unit Power Regulation setting state.If unit is AGC input state then distributes unit load according to the AGC control strategy, if unit does not drop into AGC control then unit load is adjusted to assumed load.
Claims (1)
1. unit low frequency self-starting system is characterized in that: at hardware aspect, be made of the communication path redundant configuration of visual plant terrain Monitoring and Controlling element, PLC, host computer server, operator station and related network device; The terrain slave computer is bus structures, and terrain Monitoring and Controlling element and PLC equipment interconnect by the MB+ network; The host computer network is star-shaped network structure, and PLC, host computer server, operator station all interconnect by optical fiber or twisted-pair feeder;
Grid Ethernet is main communication media, and equipment component is by serial communication, and network configuration is the layer distributed structure, and the core of the superiors is that computer server is responsible for processing comparatively complicated problem such as data storage and processing, complex logic computing; The intermediate layer is slave computer PLC control unit; Terrain Monitoring and Controlling element is the execution unit of bottom; Thereby combined with slave computer PLC control unit by computer supervisory control system and to have realized a kind of comparatively general and AGC and the automatic low all self-starting modes of variable element that match of startup-shutdown strategy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220510222 CN202856449U (en) | 2012-10-08 | 2012-10-08 | Low-frequency self-startup system for set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220510222 CN202856449U (en) | 2012-10-08 | 2012-10-08 | Low-frequency self-startup system for set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202856449U true CN202856449U (en) | 2013-04-03 |
Family
ID=47987604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220510222 Expired - Lifetime CN202856449U (en) | 2012-10-08 | 2012-10-08 | Low-frequency self-startup system for set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202856449U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916487A (en) * | 2012-10-08 | 2013-02-06 | 辽宁省电力有限公司电力科学研究院 | System and method for realizing low-frequency self-starting of unit |
-
2012
- 2012-10-08 CN CN 201220510222 patent/CN202856449U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916487A (en) * | 2012-10-08 | 2013-02-06 | 辽宁省电力有限公司电力科学研究院 | System and method for realizing low-frequency self-starting of unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102801208B (en) | Multi-path power supply intelligent scheduling manager and control method thereof | |
| CN104221240B (en) | The load curve management method and its control system of low pressure or medium voltage network | |
| CN102710023B (en) | Be applicable to the supervisory control system of dissimilar wind-light storage micro-grid system | |
| CN104052078B (en) | Micro-grid connection operational mode switches regulate and control method and the system of islet operation pattern | |
| CN102324741B (en) | Micro-power grid off-grid energy balance and control device and method | |
| CN103947069B (en) | Power connection control system and method | |
| CN110011353B (en) | Parallel operation control system and method for diesel generator power supply and distribution system | |
| CN105718686B (en) | One kind being based on event driven power distribution network analogue system and its emulation mode | |
| CN202084997U (en) | Digital integrated AC/DC power supply chief monitoring device | |
| CN103972888A (en) | Microgrid controller | |
| CN103178541A (en) | Control method of distributed grid-connected photovoltaic power generation devices and energy storage devices | |
| CN102969791A (en) | Flexible load management system and method of power system based on bidirectional intelligent electric meter | |
| CN103124070A (en) | Coordination control method for micro-grid system | |
| CN205353728U (en) | Electrostatic precipitator shakes and beats heating PLC two -node cluster hot backup control system | |
| CN202856449U (en) | Low-frequency self-startup system for set | |
| CN202050283U (en) | Automatic stand-by power switching device in transformer substation region | |
| CN102916487A (en) | System and method for realizing low-frequency self-starting of unit | |
| CN104734327A (en) | Automatic switchover equipment of reserve power supply | |
| CN207504787U (en) | A kind of low voltage motor control system | |
| CN202042911U (en) | Micro grid control device | |
| CN201156680Y (en) | Automatic throw-in equipment of adaptive standby power supply | |
| CN203039437U (en) | Power distribution box provided with PLC intelligent controller | |
| CN206272248U (en) | High-power high voltage and machine diesel generating set | |
| CN204334379U (en) | The V/f-with hysteretic characteristic falls down vertical microgrid inverter power supply | |
| CN114744748A (en) | Logic control method of data center diesel engine parallel machine control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |
|
| CX01 | Expiry of patent term |