CN108054754A - A kind of optimization low frequency deloading method of enterprise's isolated power grid based on GOOSE network - Google Patents
A kind of optimization low frequency deloading method of enterprise's isolated power grid based on GOOSE network Download PDFInfo
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- CN108054754A CN108054754A CN201711403285.3A CN201711403285A CN108054754A CN 108054754 A CN108054754 A CN 108054754A CN 201711403285 A CN201711403285 A CN 201711403285A CN 108054754 A CN108054754 A CN 108054754A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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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
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of optimization low frequency deloading method of enterprise's isolated power grid based on GOOSE network, including low frequency load shedding equipment, route protection measure and control device, equipment protection measure and control device, various measure and control devices and quick GOOSE communication networks；Low frequency load shedding equipment is mounted near power source bus, gathers power rail voltage and frequency, and circuit and equipment realtime power data are obtained by communication network, is carried out low-frequency load shedding logic judgment and is sent Control of decreasing load order；Route protection measure and control device, equipment protection measure and control device complete circuit and equipment voltage, electric current and it is related open into signal acquisition, carry out fault logic judgement and excision faulty line exported by relay, be carried out at the same time power calculation measurement；Various measure and control devices are done without the measurement of the circuit of the configuration protection supervisory equipment and voltage of equipment, electric current and intake, are carried out at the same time power calculation and relay outlet observing and controlling.
Description
Technical field
The invention belongs to power automation control fields.For current self-supply power plant, the enterprise customer of isolated power grid, carry
Go out the low frequency deloading method based on GOOSE network, optimize low-frequency load shedding logic, it is suitable from high to low by load excision priority level
Sequence cuts off unessential electrical equipment, and cuts off load less as far as possible, accomplishes the Precise control of low-frequency load shedding, it is ensured that power grid
Safe and stable operation.
Background technology
With economic continuous development, large industrial enterprise is also developed, and the diversity and reliability to power supply also carry
Requirements at the higher level are gone out.Some large enterprises such as industry and enterprises such as cement, colliery, chemical industry, due to production site requirement, bulk power grid supplies
Electricity can not achieve, and most enterprises both solve powerup issue, also save electricity charge spending with regard to self-built power plant isolated power grid.It is but small
Power grid isolated power grid, maximum feature are exactly that the switching of big load or power failure occur, and can generate very big disturbance, power grid frequency
Rate variation is violent, operation of power networks is caused to be on the hazard, mains breakdown, generating set full cut-off when serious bring great damage to enterprise
It loses.Low-frequency load shedding is to prevent the important defence line together of mains breakdown, but current off-load method is that the feeder line cut off on busbar is opened
It closes, the importance and scattered load to load cannot carry out effective hierarchical management, can not be real-time to the resection of load
Measurement, it is possible to make a turn to cut less and delay system recovery time, it is also possible to which more incisal guides cause responsible consumers power-off.
The content of the invention
For the extensive control method of low-frequency load shedding during current utility power grid isolated power grid, the present invention propose as
A kind of optimization low frequency deloading method of lower enterprise's isolated power grid based on GOOSE network.
The technical solution adopted by the present invention is：A kind of optimization low-frequency load shedding of enterprise's isolated power grid based on GOOSE network
Method, mainly including low frequency load shedding equipment, route protection measure and control device, equipment protection measure and control device, various measure and control devices and fast
Fast GOOSE communication networks.Low frequency load shedding equipment is mounted near power source bus, main to gather power rail voltage and frequency, is led to
It crosses communication network and obtains circuit and equipment realtime power data, carry out low-frequency low-voltage load shedding logic judgment and send Control of decreasing load life
Order.Route protection measure and control device, equipment protection measure and control device mainly complete circuit and equipment (such as motor) voltage, electric current and
Correlation is opened into signal acquisition, is carried out fault logic judgement and is exported excision faulty line by relay, is provided simultaneously with power meter
The measurement function such as calculation.Measure and control device is mainly done without the circuit of configuration protection supervisory equipment and the voltage of equipment, electric current and opens
Enter the measurement of amount, be provided simultaneously with the observing and controlling function such as power calculation and relay outlet.Above device all possesses to be communicated based on GOOSE
Light or electric ethernet interface, so as to set up fast messaging network.Each protection, measure and control device are by communication network to low frequency
Load-shedding equipment provides performance number in real time, and low frequency load shedding equipment cuts off priority by frequency definite value and off-load definite value according to load
With each circuit, equipment realtime power value, Rational choice off-load load and arrangement off-load round pass through GOOSE network or relay
Outlet is quick to provide load reduction signals, finally realizes the balance control of the power supply to become more meticulous, load, ensures the safety and stability fortune of isolated network
Row.
The optimization low frequency deloading method of above-mentioned enterprise's isolated power grid based on GOOSE network, is further characterized by：This
A little devices are all intelligent apparatus, have the function of that analog quantity such as alternating voltage, current acquisition and power calculation function, intake are such as opened
Off position acquisition function, the amount of outputing such as relay control function, logical process function, GOOSE high-speed traffic functions.Low-frequency load shedding
Device has 8 wheel low-frequency load shedding protections, and often taking turns all has respective low frequency definite value, off-load definite value, time definite value, excellent with 8
The load excision priority definite value table of first rank, can receive each protection, the realtime power value of measure and control device by GOOSE network,
By being sent to each protection, measure and control device by GOOSE network after low-frequency load shedding logic judgment, the off-load that becomes more meticulous is realized.It is each to protect
Shield, measure and control device possess GOOSE communication functions, can be periodically or according to the out-of-limit active upload performance number of numerical value, moreover it is possible to receive control
Order, control relay outlet excision load.The load general power that off-load definite value cuts off for epicycle needs, each round off-load definite value
It is corresponding with low frequency definite value, it can be according to causing degree of frequency drops after unexpected emergent power vacancy under isolated network accidental conditions
To set.Load excision priority definite value table has 8 kinds of priority levels, and each priority level can set 16 charge circuits,
16 charge circuits sequentially represent the height of the sub- priority level of the priority level.Each charge circuit IP address
Last segment table shows.Low-frequency load shedding logic gets corresponding off-load definite value according to the frequency values of calculating from definite value table, while from negative
In lotus excision priority definite value table from high to low according to priority, search corresponding charge circuit and calculate their power summation,
Then underlying device circuit to is sent cutting load order by GOOSE fast networks, reaches excision least load, it is ensured that important
The purpose that power supply unit does not have a power failure.It may be employed for being installed on the charge circuit near low frequency load shedding equipment nearby based on serial ports
Or the conventional communication mode of Ethernet interface obtains realtime power data, and excision load is exported by relay, is distributed farther out negative
Lotus circuit and equipment can realize power data reading and spatial load forecasting by GOOSE fast messaging networks.
The advantageous effect of the invention：The present invention gathers circuit and equipment is used in real time by GOOSE fast messaging networks
Electric data carry out effectively layering, fine-grained management particular for the severity level of scatteredload, the resection of load are carried out real
When measure, cut off Reasonable load as early as possible from low to high by load importance, reduce system recovery time, ensure as more as possible
Important equipment do not power off, it is ensured that power network safety operation.
Description of the drawings
Fig. 1 is the optimization low-frequency load shedding system configuration frame of enterprise's isolated power grid based on GOOSE network of present invention
Figure.
Fig. 2 is the optimization low-frequency load shedding logic theory block diagram of the embodiment of the present invention.
Specific embodiment
Technical scheme is described further below by way of specific embodiment.
As shown in Figure 1, it is the optimization low-frequency load shedding system configuration of enterprise's isolated power grid based on GOOSE network of the present invention
Block diagram.
Two sections of 10kV busbar paired runnings, the generator of 2 paired runnings in busbar left side are connected respectively on two sections of busbares,
It is feeder line on the right side of busbar, some feeder lines are powered to neighbouring equipment, and some feeder lines extend to a distant place and power to load.This is typical case
Industrial power plant isolated network primary equipment allocation plan.
For secondary device, the configure the line protection observing and controlling dress on power source bus accessory configuration low frequency load shedding equipment, circuit
It puts, equipment branch configuration equipment protection measure and control device is needing the line configuring measure and control device of participation Control of decreasing load.Low-frequency load shedding
Protection, measure and control device near device can carry out general communication by serial ports or Ethernet interface and low frequency load shedding equipment, simultaneously
In the relay outlet of operation circuit entrance access low frequency load shedding equipment.The protection in a distant place, measure and control device pass through fast by GOOSE
Fast communication network communicates with low frequency load shedding equipment.
It is configured for an electrical secondary system described above, the realization principle for optimizing low-frequency load shedding is illustrated by brief flow.
1st step, judges whether low-frequency load shedding starts.
2nd step, when power grid normal operation, low-frequency load shedding do not start, low frequency load shedding equipment passes through general communication or GOOSE
High-speed traffic obtains the performance number that each circuit or equipment protection, measure and control device calculate, and performance number can be by each protection supervisory equipment
Timing is sent.
3rd step, after low-frequency load shedding starts, into low-frequency load shedding logic.Low-frequency load shedding one shares 8 wheels, and 1 to 5 wheels are basic
Wheel, it is necessary to sequentially carry out successively, i.e., epicycle just starts after previous round action.6 to 8 wheels are special wheel, can independently be moved
Make.In low-frequency load shedding logic, first obtain frequency, frequency slip frequency, the data such as voltage, then carry out frequency criterion, slippage criterion,
The judgement of low voltage criterion.
Whether the 4th step, low-frequency load shedding N (1 to 8) wheels act, are unsatisfactory for operation condition and then return to the 3rd step.
5th step, low-frequency load shedding N wheels action, then extract N wheel off-load definite value, according to load cut off priority definite value and
Realtime power value according to priority calculates each power and value from high to low, when power and value take turns off-load definite value closest to N, just
Have chosen circuit and the equipment that epicycle needs trip.
6th step is outputed to send to the protection supervisory equipment for being selected circuit and equipment by GOOSE communications or relay and jumped
Lock signal.
Whether the 7th step, determination frequency recover normal, and the 1st step is returned if normal, otherwise return to the 3rd step.
Optimize low-frequency load shedding logic diagram, as shown in Figure 2.
The present invention has been described by way of example and in terms of the preferred embodiments, but they be not for limiting the present invention, it is any to be familiar with this skill
Skill person without departing from the spirit and scope of the invention, can make various changes or retouch from working as, therefore protection scope of the present invention
It should be subject to what claims hereof protection domain was defined.
Claims (8)
1. a kind of optimization low frequency deloading method of enterprise's isolated power grid based on GOOSE network, it is characterised in that：It includes low frequency
Load-shedding equipment, route protection measure and control device, equipment protection measure and control device, various measure and control devices and quick GOOSE communication networks；It is low
Frequency load-shedding equipment is mounted near power source bus, gathers power rail voltage and frequency, is obtained circuit by communication network and is set
Standby realtime power data carry out low-frequency load shedding logic judgment and send Control of decreasing load order；Route protection measure and control device, equipment are protected
Shield measure and control device complete circuit and equipment voltage, electric current and it is related open into signal acquisition, carry out fault logic judgement and by after
Electric appliance outlet excision faulty line, is carried out at the same time power calculation measurement；Various measure and control devices are done without configuration protection observing and controlling dress
The measurement of circuit and the voltage of equipment, electric current and the intake put is carried out at the same time power calculation and relay outlet observing and controlling.
2. the optimization low frequency deloading method of enterprise's isolated power grid according to claim 1 based on GOOSE network, feature
It is：The low frequency load shedding equipment, route protection measure and control device, equipment protection measure and control device, various measure and control devices are based on fast
The light of fast GOOSE communication networks or electric ethernet interface, set up communication network；Route protection measure and control device, equipment protection
Measure and control device and various measure and control devices provide performance number, low frequency in real time by quick GOOSE communication networks to low frequency load shedding equipment
Load-shedding equipment cuts off priority and each circuit, equipment realtime power value, rationally by frequency definite value and off-load definite value according to load
It chooses off-load load and arranges off-load round, load reduction signals are quickly provided by quick GOOSE communication networks or relay outlet,
It realizes the balance control of the power supply to become more meticulous, load, ensures the safe and stable operation of isolated network.
3. the optimization low frequency deloading method of enterprise's isolated power grid according to claim 1 based on GOOSE network, feature
It is：Route protection measure and control device, equipment protection measure and control device and various measure and control devices possess GOOSE communication functions, can timing
Or according to the out-of-limit active upload performance number of numerical value, moreover it is possible to receive control command, control relay outlet excision load.
4. the optimization low frequency deloading method of enterprise's isolated power grid based on GOOSE network according to claim 1,2 or 3,
It is characterized in that：Low frequency load shedding equipment have 8 wheel low-frequency load shedding protection, often take turns all have respective low frequency definite value, off-load definite value,
Time definite value has the load excision priority definite value table of 8 priority levels, can receive line by quick GOOSE communication networks
The realtime power value of road protection supervisory equipment, equipment protection measure and control device and various measure and control devices, is sentenced by low-frequency load shedding logic
It has no progeny and route protection measure and control device, equipment protection measure and control device and various observing and controlling dress is sent to by quick GOOSE communication networks
It puts, realizes the off-load that becomes more meticulous.
5. the optimization low frequency deloading method of enterprise's isolated power grid according to claim 4 based on GOOSE network, feature
It is：The load general power that off-load definite value cuts off for epicycle needs, each round off-load definite value is corresponding with low frequency definite value, according to orphan
Cause degree of frequency drops after unexpected emergent power vacancy to set under net accidental conditions.
6. the optimization low frequency deloading method of enterprise's isolated power grid according to claim 4 based on GOOSE network, feature
It is：Load excision priority definite value table has 8 kinds of priority levels, and each priority level can set 16 charge circuits, and 16
A charge circuit sequentially represents the height of the sub- priority level of the priority level；Each charge circuit IP address is most
Latter segment table shows.
7. the optimization low frequency deloading method of enterprise's isolated power grid according to claim 4 based on GOOSE network, feature
It is：Low-frequency load shedding logic is got corresponding off-load definite value from definite value table, while is cut off from load according to the frequency values of calculating
In priority definite value table from high to low according to priority, search corresponding charge circuit and calculate their power summation, Ran Houtong
It crosses quick GOOSE communication networks and sends cutting load order to equipment and circuit, reach excision least load, ensure important power supply
The purpose that equipment does not have a power failure.
8. the optimization low frequency deloading method of enterprise's isolated power grid according to claim 4 based on GOOSE network, feature
It is：The general communication based on serial ports or Ethernet interface is used for being installed on the charge circuit near low frequency load shedding equipment nearby
Mode obtains realtime power data, exports excision load by relay, being distributed charge circuit farther out and equipment can pass through
Quick GOOSE communication networks realize power data reading and spatial load forecasting.
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| CN201711403285.3A CN108054754B (en) | 2017-12-22 | 2017-12-22 | GOOSE network-based optimization low-frequency load shedding method for isolated network operation of enterprise |
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| CN201711403285.3A CN108054754B (en) | 2017-12-22 | 2017-12-22 | GOOSE network-based optimization low-frequency load shedding method for isolated network operation of enterprise |
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Cited By (1)
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