CN108879668A - A kind of active vacancy real-time computing technique of system based on response - Google Patents
A kind of active vacancy real-time computing technique of system based on response Download PDFInfo
- Publication number
- CN108879668A CN108879668A CN201810750425.2A CN201810750425A CN108879668A CN 108879668 A CN108879668 A CN 108879668A CN 201810750425 A CN201810750425 A CN 201810750425A CN 108879668 A CN108879668 A CN 108879668A
- Authority
- CN
- China
- Prior art keywords
- active
- load
- vacancy
- moment
- real
- 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.)
- Pending
Links
Classifications
-
- 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
-
- 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
Abstract
The present invention relates to a kind of active vacancy real-time computing techniques of system based on response, according to real-time electric power network and the active information of load, after electric system is broken down, when occurrence frequency stability problem, the equivalent inertia of system is calculated using frequency and the active information of load；Calculating variation gives load active bring variable quantity；Active vacancy is obtained, failure arrives after occurring in compensationMoment variation gives load active bring variable quantity, total active vacancy of system after being broken down.Method proposed by the present invention carries out accurate low-frequency load shedding operation using the active vacancy of the system of acquisition, can prevent the mistake of load from cutting and owing to cut, improve frequency retrieval stabilizing power.
Description
Technical field
The present invention relates to technical field of power systems, the active vacancy of especially a kind of system based on the response side of calculating in real time
Method.
Background technique
It, can be by fixed low-frequency load shedding when stability problem occurs for the frequency of system in current electric system
Device promotes near the frequency retrieval to rated value of system.But for tradition is by round low-frequency load shedding prioritization scheme,
The validity of off-load scheme depends on the compactness of forecast accident and physical fault, while the off-load scheme that not can guarantee setting exists
Effect under all fault modes is optimal.Therefore, it is necessary to design it is a kind of can the active vacancy of system based on response message it is real-time
Calculation method has great significance to adaptive low-frequency load shedding scheme to restore stable ability after improving frequency unstability.
Summary of the invention
It is existing to overcome the purpose of the present invention is to provide a kind of active vacancy real-time computing technique of system based on response
Defect present in technology.
To achieve the above object, the technical scheme is that：A kind of active vacancy of system based on response calculates in real time
Method is realized in accordance with the following steps：
Step S1：After electric system is broken down, had according to the load that wide-area monitoring systems obtain two moment t1 and t2
Function information and inertia centre frequency change rate obtain system equivalent inertia；
Wherein：MeqFor system equivalent inertia after breaking down；PL, t=tiLoad for the t=ti moment is active；For t
=ti moment inertia centre frequency change rate；
Step S2：After system jam, if frequency retrieval to normal operating condition, when total active vacancy calculates,
Compensate variation to load it is active caused by variable quantity：
Wherein：It is load before failureMoment corresponding active power；PL, t=TIt is load t=after a failure
T moment corresponding active power：
Step S3：Obtain the active vacancy Δ P at t=T momentT, but since the load active power at t=T moment is PL, t=T,
And the active vacancy of load when system normal operation isTo restore to system to operate normally, total active vacancy also needs to mend
Repay the active variable quantity of load：
Wherein：ΔPT,TotalEtching system total active vacancy when for t=T.
In an embodiment of the present invention, 500ms is divided between the value of t1 and t2.
Compared to the prior art, the invention has the advantages that：A kind of system based on response proposed by the present invention
Active vacancy real-time computing technique, it is only necessary to which the inertia center frequency information and the active information of load for knowing power grid can obtain
The real-time computing technique of the active vacancy of system.Compared to existing method, the present invention is without carrying out preset cutting load movement, in event
Barrier can calculate system equivalent inertia after occurring, and then estimate system active vacancy in real time, rise to low-frequency load shedding scheme
To important role, the stable ability of frequency retrieval is enhanced.
Detailed description of the invention
Fig. 1 is IEEE39 node diagram in one embodiment of the invention.
Specific embodiment
With reference to the accompanying drawing, technical solution of the present invention is specifically described.
The present invention proposes a kind of active vacancy real-time computing technique of the system based on response, and this method is monitored according to wide area to be believed
It is active in real time scarce can to calculate system after breaking down for (WAMS) system of breath actual measurement mains frequency and the active information of load
Volume.Specifically comprise the following steps：
Step S1：After electric system is broken down, the active information of load and inertia center frequency of two moment t1 and t2 are taken
Rate change rate calculates the equivalent inertia of system.T1 and t2 is biggish two points of voltage phase difference, generally takes the interval t1 and t2
500ms；
Wherein：MeqFor system equivalent inertia after breaking down；PL, t=tiLoad for the t=ti moment is active；For t
The frequency change rate at=ti moment inertia center；
Step S2：After system jam, since variation can be brought greater impact to load is active, to restore
To normal operating condition, total active vacancy to be compensated when calculating variation to load it is active caused by variable quantity；
Wherein：It is load before failureMoment corresponding active power；PL, t=TIt is load t=after a failure
T moment corresponding active power.
Step S3：Calculate the active vacancy Δ P at t=T momentT, but be P since the load at t=T moment is activeL, t=T, and
System operate normally when the active vacancy of load beTo restore to system to operate normally, total active vacancy also needs to compensate
The active variable quantity of upper load；
Wherein：ΔPT,TotalEtching system total active vacancy when for t=T.
Further, in order to allow those skilled in the art to further appreciate that technical solution proposed by the present invention, below with reference to
Specific embodiment is illustrated.
IEEE39 node system is selected, as shown in Figure 1.0.2s moment G3, G9 unit falls off simultaneously, while 25-26 line
Road, 18-3 route, 14-4 route, 11-6 circuit breaking, the i.e. right half part in IEEE39 node system establish isolated island, load
Including node 12,15,16,18,20,21,23,24,26,27,28,29, generator includes fired power generating unit G4, G5, G6, G7.Respectively
A generated power and inertia are as shown in table 1, and each load bus is active as shown in table 2.
Each generated power of table 1 and inertia
| Generator | Active (p.u.) | Inertia (s) |
| G4 | 6.32 | 57.2 |
| G5 | 5.08 | 52.0 |
| G6 | 6.50 | 69.6 |
| G7 | 5.60 | 52.8 |
Each load bus of table 2 is active
By setting failure, the system mechanics power after obtaining failure isLoad is active to be
Actual power vacancy is
The first step：After electric system is broken down, the active information of load and inertia center frequency of two moment t1 and t2 are taken
Rate change rate calculates the equivalent inertia of system.As t=2.78s, frequency drops to low-frequency load shedding movement threshold value 49Hz,
So taking t2=2.78s, t1=2.28s calculates the system equivalent inertia of t=2.78s.
Second step：To be restored to normal operating condition, total active vacancy will compensate variation to load when calculating
The active variable quantity before breaking down between t=2.78s of variable quantity caused by active, i.e. load.
Third step：Calculate the active vacancy Δ P at t=2.78s momentT=2.78s, the variable quantity of burden with power, obtains in compensation
To total active vacancy.
The percentage for being converted to power shortage is 27.8%, very close with actual active vacancy 26.2%.
The above are preferred embodiments of the present invention, all any changes made according to the technical solution of the present invention, and generated function is made
When with range without departing from technical solution of the present invention, all belong to the scope of protection of the present invention.
Claims (2)
1. a kind of active vacancy real-time computing technique of system based on response, which is characterized in that realize in accordance with the following steps：
Step S1：After electric system is broken down, the active letter of load of two moment t1 and t2 are obtained according to wide-area monitoring systems
Breath and inertia centre frequency change rate obtain system equivalent inertia；
Wherein：MeqFor system equivalent inertia after breaking down；PL, t=tiLoad for the t=ti moment is active；For t=ti
Moment inertia centre frequency change rate；
Step S2：After system jam, if frequency retrieval will be mended to normal operating condition when total active vacancy calculates
Repay variation to load it is active caused by variable quantity：
Wherein：It is load before failureMoment corresponding active power；PL, t=TBe load after a failure t=T when
Carve corresponding active power：
Step S3：Obtain the active vacancy Δ P at t=T momentT, but since the load active power at t=T moment is PL, t=T, and be
System operate normally when the active vacancy of load beTo restore to system to operate normally, total active vacancy is also needed in compensation
The active variable quantity of load：
Wherein：ΔPT,TotalEtching system total active vacancy when for t=T.
2. the active vacancy real-time computing technique of a kind of system based on response according to claim 1, which is characterized in that t1
500ms is divided between the value of t2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810750425.2A CN108879668A (en) | 2018-07-10 | 2018-07-10 | A kind of active vacancy real-time computing technique of system based on response |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810750425.2A CN108879668A (en) | 2018-07-10 | 2018-07-10 | A kind of active vacancy real-time computing technique of system based on response |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108879668A true CN108879668A (en) | 2018-11-23 |
Family
ID=64300541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810750425.2A Pending CN108879668A (en) | 2018-07-10 | 2018-07-10 | A kind of active vacancy real-time computing technique of system based on response |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108879668A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429619A (en) * | 2019-08-31 | 2019-11-08 | 上海交通大学 | A kind of disaster tolerance reaction method of the Demand-side frequency urgent control of ultra-large power grid |
| CN111276978A (en) * | 2020-03-28 | 2020-06-12 | 福建华电万安能源有限公司 | Real-time calculation method for active power shortage of system after fault considering load characteristics |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956747A (en) * | 2014-03-28 | 2014-07-30 | 西安交通大学 | Self-adaptive low frequency load shedding method based on local response information |
| CN103956746A (en) * | 2014-03-28 | 2014-07-30 | 西安交通大学 | Automatic-adaptation under-frequency load shedding method based on frequency changing rate response |
-
2018
- 2018-07-10 CN CN201810750425.2A patent/CN108879668A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956747A (en) * | 2014-03-28 | 2014-07-30 | 西安交通大学 | Self-adaptive low frequency load shedding method based on local response information |
| CN103956746A (en) * | 2014-03-28 | 2014-07-30 | 西安交通大学 | Automatic-adaptation under-frequency load shedding method based on frequency changing rate response |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429619A (en) * | 2019-08-31 | 2019-11-08 | 上海交通大学 | A kind of disaster tolerance reaction method of the Demand-side frequency urgent control of ultra-large power grid |
| CN110429619B (en) * | 2019-08-31 | 2022-08-09 | 上海交通大学 | Disaster recovery reaction method for demand side frequency emergency control of super-large-scale power grid |
| CN111276978A (en) * | 2020-03-28 | 2020-06-12 | 福建华电万安能源有限公司 | Real-time calculation method for active power shortage of system after fault considering load characteristics |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2541717B1 (en) | System and method for automated fault control and restoration of smart grids | |
| Phadke et al. | Communication needs for wide area measurement applications | |
| CN101908764B (en) | Self-healing control method of electric network | |
| CN108879668A (en) | A kind of active vacancy real-time computing technique of system based on response | |
| CN103440401A (en) | Risk quantitative assessment method for emergency control measure for improving power transmission capacity of power grid | |
| CN108808701A (en) | A kind of system inertia real-time computing technique based on response | |
| CN103928939B (en) | Direct-current commutation failure impacts the computational methods of lower alternating current interconnection tie power fluctuation peak | |
| CN102663522A (en) | On-line risk evaluation method of power grid | |
| CN110165679A (en) | The adaptive cutting load method of meter and system frequency and voltage characteristic | |
| CN105226623A (en) | Containing the adaptive Current Protection method of the power distribution network of high permeability distributed power source | |
| CN110661294A (en) | DFIG-containing interval temporary frequency-reduction sub-estimation method based on adaptive kernel density estimation | |
| KR101183162B1 (en) | Parameter optimization method of superconducting fault current limiter | |
| JP5312546B2 (en) | Circuit breaker contact consumption control system | |
| CN102208808A (en) | Power regulation method for improved-power-flow-tracing-based risk assessment | |
| CN103779846B (en) | The power network line wide area current protection method of revising fast based on admittance matrix | |
| CN108923434A (en) | A kind of centralized low-frequency load shedding control method based on response | |
| CN105226636A (en) | The online low frequency deloading method in real time of a kind of electric power system based on PMU | |
| CN104319779B (en) | Regional power grid reactive voltage control method | |
| CN104300534A (en) | Active splitting method and system for local power grid | |
| CN101697474B (en) | Remote automatic control method of high-voltage shut reactor considering safety of system voltage | |
| CN104201684B (en) | Low frequency low voltage load shedding optimization control method based on load control sensitivity | |
| CN104393597B (en) | Meter and the power system UFLS optimization method of probability and risk | |
| CN110336315B (en) | Isolated network operation control system for local power grid of receiving-end city | |
| CN102611084B (en) | Self-adaptive voltage protection method | |
| KR102473811B1 (en) | Overcurrent relay and its control method for applying fault current limiter to distribution system with decentralized power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181123 |