CN109617124A - A kind of flexible load control method and system in island network black starting-up - Google Patents
A kind of flexible load control method and system in island network black starting-up Download PDFInfo
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- CN109617124A CN109617124A CN201811640508.2A CN201811640508A CN109617124A CN 109617124 A CN109617124 A CN 109617124A CN 201811640508 A CN201811640508 A CN 201811640508A CN 109617124 A CN109617124 A CN 109617124A
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- system frequency
- flexible load
- load
- frequency
- restored
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Classifications
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
-
- 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 present invention relates to a kind of flexible load control methods and system in island network black starting-up, method includes: during island network black starting-up, real-time monitoring supply side system frequency, when system frequency be lower than predeterminated frequency range, first gradually reduce the power of adjustable flexible load；If system frequency is still below predeterminated frequency range or continues to decline after the power for reducing adjustable flexible load, then gradually interruption can interrupt flexible load；When system frequency is higher than predeterminated frequency range, first continue to restore Demand-side load；If system frequency is still higher than predeterminated frequency range or continues growing, it is stepped up the power of adjustable flexible load；Until system frequency is restored to normal range (NR)；After system frequency is restored to normal range (NR), continue to restore Demand-side load according to recovery plan, until the full recovery of the whole network load.The present invention is can be by adjusting the power of flexible load, so as to the good stability for keeping system frequency.
Description
Technical field
The present invention relates to island network black starting-up fields, and in particular to a kind of negative for the flexibility in island network black starting-up
Lotus control method and system.
Background technique
After entire network system is stopped transport because of failure, system all has a power failure, however not excluded that and isolated minor scale power net still maintains to run, this
When need to carry out black starting-up by isolated minor scale power net, drive the generating set of non self starting, system recovery be gradually expanded
Range, the final recovery for realizing whole system, the most prominent feature of isolated power grid is to be changed into frequency control by load control system,
It is required that speed-regulating system has satisfactory static characteristic, good stability and dynamic response characteristic, it is negative in user to guarantee
Lotus automatically keeps the stabilization of mains frequency in the case where changing, still, since island network power system capacity is small, system runs inertia
It is small, cause system stability poor, power deviation can cause biggish frequency fluctuation, Jin Errong between black starting-up power supply and load
Easily lead to power supply chaser, black starting-up procedure failure.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of flexible load controlling party in island network black starting-up
Method and system, when system frequency abnormality, by adjusting flexible load power, restore system frequency in the power system restoration stage
To normal range (NR), technical scheme is as follows:
As the first aspect of the present invention, a kind of flexible load control method in island network black starting-up is provided,
It the described method comprises the following steps:
Step 1, during island network black starting-up, real-time monitoring supply side system frequency, when system frequency is not pre-
If when frequency range, first pause restores Demand-side load, system frequency change direction is judged, according to system frequency change direction tune
Flexible load power is saved, system frequency is made to be restored to normal range (NR)；
Step 2, after system frequency is restored to normal range (NR), continue to restore Demand-side load according to recovery plan, until
The whole network load full recovery.
Further, described that flexible load power is adjusted according to system frequency change direction, it is restored to system frequency just
Normal range specifically includes:
When system frequency be lower than predeterminated frequency range, first gradually reduce the power of adjustable flexible load, until system frequency
Rate is restored to normal range (NR)；
If after the power for reducing adjustable flexible load, under system frequency is still below predeterminated frequency range or continues
Drop, then gradually interruption can interrupt flexible load, until system frequency is restored to normal range (NR).
Further, described that flexible load power is adjusted according to system frequency change direction, it is restored to system frequency just
Normal range further include:
When system frequency is higher than predeterminated frequency range, first continue to restore Demand-side load, until system frequency is restored to
Normal range (NR)；
If system frequency is still higher than predeterminated frequency range or continues growing, it is stepped up adjustable flexible load
Power, until system frequency is restored to normal range (NR).
Further, the method also includes: during island network black starting-up, during having confirmed black starting-up in advance
The classification of restored load monitors the power of load of all categories in real time.
As a second aspect of the invention, a kind of flexible load control system in island network black starting-up is provided,
The system comprises monitoring unit and adjust unit；
The monitoring unit is used for real-time monitoring supply side system frequency；
The adjusting unit is used to judge system frequency change direction, root when system frequency is not in predeterminated frequency range
Flexible load power is adjusted according to system frequency change direction, system frequency is made to be restored to normal model.
Further, the adjusting unit includes the first adjusting unit, and described first adjusts unit is adjusted including first
Flexible load, which adjusts unit and first, can interrupt flexible load adjusting unit；
The first adjustable flexible Load Regulation unit is used to be lower than predeterminated frequency range when system frequency, gradually reduces
The power of adjustable flexible load, until system frequency is restored to normal range (NR)；
Described first, which can interrupt flexible load, adjusts unit for after the power for reducing adjustable flexible load, system to be frequently
When rate is still below predeterminated frequency range or continues decline, then gradually interruption can interrupt flexible load, until system frequency is restored
To normal range (NR).
Further, the adjusting unit further includes the second adjusting unit, and the second adjusting unit includes load restoration
Unit and the second adjustable flexible Load Regulation unit；
The load restoration unit is used to continue to restore Demand-side load when system frequency is higher than predeterminated frequency range,
Until system frequency is restored to normal range (NR)；
The second adjustable flexible Load Regulation unit be used for when system frequency be still higher than predeterminated frequency range or after
It is continuous to increase, it is stepped up the power of adjustable flexible load, until system frequency is restored to normal range (NR).
Beneficial effects of the present invention:
The present invention is proposed to be reduced the power deviation during black starting-up using flexible load control technology, can determined in advance
The classification and capacity of restored load, determine adjustability during black starting-up, when progress black starting-up gradually restores load,
Real-time monitoring system frequency reduces adjustable flexible load power, if frequency when finding that system frequency is constantly reduced first
Continue to reduce, according to load priority, excision can interrupt flexible load one by one, until system frequency is stablized；When discovery system frequency
When rate is continuously increased, continue to restore load according to load restoration sequence, if frequency continues growing, increases adjustable flexible load
Power, until system frequency is stablized.
Detailed description of the invention
Fig. 1 is a kind of stream for the flexible load control method in island network black starting-up provided in an embodiment of the present invention
Cheng Tu.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only present invention a part, instead of all the embodiments.Based on the present invention
In embodiment, all other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
After entire electric system causes the whole network to have a power failure because of failure, black starting-up can be started according to schedule, gradually restore demand
Side load, and island network operation needs to keep the stability of mains frequency, it is provided by the invention a kind of black for island network
Flexible load control method and system in starting, can the good stability for keeping mains frequency.
As shown in Figure 1, a kind of flexible load control method in island network black starting-up provided by the invention, described
Method the following steps are included:
Step 1, during island network black starting-up, real-time monitoring supply side system frequency, when system frequency is not pre-
If when frequency range, first pause restores Demand-side load, system frequency change direction is judged, according to system frequency change direction tune
Flexible load power is saved, system frequency is made to be restored to normal range (NR)；
Step 2, after system frequency is restored to normal range (NR), continue to restore Demand-side load according to recovery plan, until
The whole network load full recovery.
In above-described embodiment, after entire electric system causes the whole network to have a power failure because of failure, black starting-up can be started according to schedule,
Gradually restore Demand-side load, and island network operation needs to keep the stability of mains frequency, a kind of use provided by the invention
Flexible load control method in island network black starting-up, real-time monitoring system frequency, when system frequency is too high or too low,
It can be by adjusting the power of flexible load, so as to the good stability for keeping mains frequency.
Preferably, described that flexible load power is adjusted according to system frequency change direction, so that system frequency is restored normal model
It encloses and specifically includes:
When system frequency be lower than predeterminated frequency range, first gradually reduce the power of adjustable flexible load, until system frequency
Rate is restored to normal range (NR)；If system frequency is still below predeterminated frequency range after the power for reducing adjustable flexible load
Or continue to decline, then gradually interruption can interrupt flexible load, until system frequency is restored to normal range (NR)；
When system frequency is higher than predeterminated frequency range, first continue to restore Demand-side load, until system frequency is restored to
Normal range (NR)；If system frequency is still higher than predeterminated frequency range or continues growing, it is stepped up adjustable flexible load
Power, until system frequency is restored to normal range (NR).
In above-described embodiment, when system frequency be lower than predeterminated frequency range, first gradually reduce the function of adjustable flexible load
Rate, if system frequency is still below predeterminated frequency range or continues to decline after the power for reducing adjustable flexible load, then
Flexible load can be interrupted by gradually interrupting, until system frequency is restored to normal range (NR), just continue to restore load；When system frequency height
When predeterminated frequency range, it can first pass through and continue to restore load, such as continue to restore load, cannot still drop system frequency and drop to normally
Range is then stepped up the power of adjustable flexible load, until system frequency is restored to normal range (NR).
Preferably, the method also includes: during island network black starting-up, confirmed institute during black starting-up in advance
The classification for restoring load, monitors the power of load of all categories in real time.
In above-described embodiment, by having confirmed that the classification of restored load during black starting-up, real time monitoring are all kinds of in advance
The power of other load, such as during island network black starting-up, load general power, the adjustable flexible for monitoring recovery in real time are negative
Lotus power and flexible load power can be interrupted, by the load general power of monitoring, adjustable flexible load power and can interrupted soft
Property load power, can prejudge regulating power.
The present invention is proposed to be reduced the power deviation during black starting-up using flexible load control technology, be determined in advance black
The classification of restored load, capacity and adjustability in start-up course, when progress black starting-up gradually restores load, in real time
System frequency, power supply and flexible load power are monitored, when finding that system frequency is constantly reduced, reduces adjustable flexible first
Load power, if frequency continues to reduce, according to load priority, excision can interrupt flexible load one by one, until system frequency
Stablize；When finding that system frequency is continuously increased, continue to restore load according to load restoration sequence, if frequency continues growing,
Increase adjustable flexible load power, until system frequency is stablized.
In addition, the present invention also provides a kind of flexible load control system in island network black starting-up, the system
Including monitoring unit and adjust unit；
The monitoring unit is used for real-time monitoring supply side system frequency；
The adjusting unit is used to judge system frequency change direction, root when system frequency is not in predeterminated frequency range
Flexible load power is adjusted according to system frequency change direction, system frequency is made to be restored to normal model.
Preferably, the adjusting unit includes the first adjusting unit, and the first adjusting unit is adjusted soft including first
Property Load Regulation unit and first can interrupt flexible load adjust unit；
The first adjustable flexible Load Regulation unit is used to be lower than predeterminated frequency range when system frequency, gradually reduces
The power of adjustable flexible load, until system frequency is restored to normal range (NR)；
Described first, which can interrupt flexible load, adjusts unit for after the power for reducing adjustable flexible load, system to be frequently
When rate is still below predeterminated frequency range or continues decline, then gradually interruption can interrupt flexible load, until system frequency is restored
To normal range (NR).
Preferably, the adjusting unit further includes the second adjusting unit, and the second adjusting unit includes load restoration list
Member and the second adjustable flexible Load Regulation unit；
The load restoration unit is used to continue to restore Demand-side load when system frequency is higher than predeterminated frequency range,
Until system frequency is restored to normal range (NR)；
The second adjustable flexible Load Regulation unit be used for when system frequency be still higher than predeterminated frequency range or after
It is continuous to increase, it is stepped up the power of adjustable flexible load, until system frequency is restored to normal range (NR).
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of flexible load control method in island network black starting-up, which is characterized in that the method includes following
Step:
Step 1, during island network black starting-up, real-time monitoring supply side system frequency, when system frequency is not in default frequency
When rate range, first pause restores Demand-side load, judges system frequency change direction, is adjusted according to system frequency change direction soft
Property load power, makes system frequency be restored to normal range (NR)；
Step 2, after system frequency is restored to normal range (NR), continue to restore Demand-side load according to recovery plan, until the whole network
Load full recovery.
2. the flexible load control method according to claim 1 in island network black starting-up, which is characterized in that institute
It states and flexible load power is adjusted according to system frequency change direction, so that system frequency is restored to normal range (NR) and specifically include:
When system frequency is lower than predeterminated frequency range, the power of adjustable flexible load is first gradually reduced, until system frequency is extensive
Normal range (NR) is arrived again；
If system frequency is still below predeterminated frequency range or continues to decline after the power for reducing adjustable flexible load,
Flexible load can be interrupted by gradually interrupting again, until system frequency is restored to normal range (NR).
3. the flexible load control method according to claim 2 in island network black starting-up, which is characterized in that institute
It states and flexible load power is adjusted according to system frequency change direction, system frequency is made to be restored to normal range (NR) further include:
When system frequency is higher than predeterminated frequency range, first continue to restore Demand-side load, until system frequency is restored to normally
Range；
If system frequency is still higher than predeterminated frequency range or continues growing, it is stepped up the function of adjustable flexible load
Rate, until system frequency is restored to normal range (NR).
4. the flexible load control method according to claim 1 in island network black starting-up, which is characterized in that institute
State method further include: during island network black starting-up, the classification of restored load during black starting-up has been confirmed in advance, it is real
When monitor the power of load of all categories.
5. a kind of flexible load control system in island network black starting-up, which is characterized in that the system comprises monitoring
Unit and adjusting unit；
The monitoring unit is used for real-time monitoring supply side system frequency；
The adjusting unit is used to judge system frequency change direction when system frequency is not in predeterminated frequency range, according to being
Frequency change direction of uniting adjusts flexible load power, and system frequency is made to be restored to normal model.
6. the flexible load control system according to claim 5 in island network black starting-up, which is characterized in that its
It is characterized in that, the adjusting unit includes the first adjusting unit, and described first, which adjusts unit, includes the first adjustable flexible load
Flexible load adjusting unit can be interrupted by adjusting unit and first；
The first adjustable flexible Load Regulation unit is used to be lower than predeterminated frequency range when system frequency, gradually reduces adjustable
The power of flexible load is saved, until system frequency is restored to normal range (NR)；
Described first, which can interrupt flexible load, adjusts unit for after the power for reducing adjustable flexible load, system frequency to be still
When lower than predeterminated frequency range or continuing decline, then gradually interruption can interrupt flexible load, until system frequency is restored to just
Normal range.
7. the flexible load control system according to claim 6 in island network black starting-up, which is characterized in that institute
Stating and adjusting unit further includes the second adjusting unit, and the second adjusting unit includes load restoration unit and the second adjustable flexible
Load Regulation unit；
The load restoration unit is used to continue to restore Demand-side load when system frequency is higher than predeterminated frequency range, until
System frequency is restored to normal range (NR)；
The second adjustable flexible Load Regulation unit is used to be still higher than predeterminated frequency range when system frequency or continue to increase
Add, be stepped up the power of adjustable flexible load, until system frequency is restored to normal range (NR).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811640508.2A CN109617124A (en) | 2018-12-29 | 2018-12-29 | A kind of flexible load control method and system in island network black starting-up |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811640508.2A CN109617124A (en) | 2018-12-29 | 2018-12-29 | A kind of flexible load control method and system in island network black starting-up |
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| CN109617124A true CN109617124A (en) | 2019-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811640508.2A Pending CN109617124A (en) | 2018-12-29 | 2018-12-29 | A kind of flexible load control method and system in island network black starting-up |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746114A (en) * | 2021-09-02 | 2021-12-03 | 中国电建集团江西省电力设计院有限公司 | Control method and system for optimizing frequency modulation of island power grid |
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| CN106356892A (en) * | 2016-10-14 | 2017-01-25 | 易事特集团股份有限公司 | Microgrid black-start method |
| CN108683195A (en) * | 2018-06-29 | 2018-10-19 | 国网山东省电力公司电力科学研究院 | A kind of method that temperature control load participates in electric system frequency modulation |
| CN111835022A (en) * | 2020-07-14 | 2020-10-27 | 国网电力科学研究院有限公司 | Industrial isolated network frequency adjusting method, device and system |
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| CN106169767A (en) * | 2016-06-23 | 2016-11-30 | 国网新疆电力公司电力科学研究院 | Fired power generating unit primary frequency modulation and the control method for coordinating of AGC |
| CN106356892A (en) * | 2016-10-14 | 2017-01-25 | 易事特集团股份有限公司 | Microgrid black-start method |
| CN108683195A (en) * | 2018-06-29 | 2018-10-19 | 国网山东省电力公司电力科学研究院 | A kind of method that temperature control load participates in electric system frequency modulation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113746114A (en) * | 2021-09-02 | 2021-12-03 | 中国电建集团江西省电力设计院有限公司 | Control method and system for optimizing frequency modulation of island power grid |
| CN113746114B (en) * | 2021-09-02 | 2023-03-24 | 中国电建集团江西省电力设计院有限公司 | Control method and system for optimizing frequency modulation of island power grid |
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Application publication date: 20190412 |