CN109494738A - A kind of electric network fault fast and stable control method of automatic synchronization control - Google Patents
A kind of electric network fault fast and stable control method of automatic synchronization control Download PDFInfo
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- CN109494738A CN109494738A CN201811603633.6A CN201811603633A CN109494738A CN 109494738 A CN109494738 A CN 109494738A CN 201811603633 A CN201811603633 A CN 201811603633A CN 109494738 A CN109494738 A CN 109494738A
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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
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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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
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Abstract
The present invention provides a kind of electric network fault fast and stable control method of automatic synchronization control, this method comprises: obtaining regional power grid model and regional power grid Data of State Estimation every the first preset time period；The whole network model and the whole network Data of State Estimation comprising outer net are obtained every the second preset time period；According to the difference of powernet safety analysis and forecast failure safety analysis demand, select regional power grid model and its Data of State Estimation or the whole network model and its Data of State Estimation as calculating online data respectively；According to calculating online data, powernet safety analysis and forecast failure safety analysis are carried out, obtains analysis result and aid decision strategy；Based on the analysis results, stability contorting is carried out to power grid by aid decision strategy by AGC, AVC and load lot control system.The present invention can adapt to bulk power grid operation control needs, and can realize that the fast and stable of power grid controls by " one-touch " operation when catastrophe failure occurs for power grid.
Description
Technical field
The present invention relates to dispatching of power netwoks control running technology field more particularly to a kind of electric network faults of automatic synchronization control
Fast and stable control method.
Background technique
With gradually forming for China's extra-high voltage alternating current-direct current mixed connection bulk power grid pattern, power system security stability characteristic (quality) and machine
Manage it is increasingly sophisticated, operation of power networks control difficulty continue to increase, the fining and lean of power system security stability analysis are mentioned
New requirement is gone out.As the important link of " big operation " construction in State Grid Corporation of China " three collection five are big ", State Grid Corporation of China
System carried out the construction of smart grid Dispatching Control System since 2009, wherein safety on line analysis system, early warning and auxiliary
Help decision making function, Automatic Generation Control function (Automatic Generation Control；AGC), automatism voltage control function
It can (Automatic Voltage Control；AVC) and load batch control function is gradually at power grid regulation centers at different levels
Deployment is implemented.
On-line security and stability analysis system application range has covered state, has divided, saves three-class power network, grasps electricity to real-time
Net invariant feature improves electric power netting safe running level and has played positive effect.Electricity wherein based on safety on line analytical calculation
Net online dynamic secure estimation realize utilize online data carry out static security analysis, multilayer output feedback network, small interference stability
The functions such as calculating, frequency stabilization calculate, voltage stabilization calculates, the section limit calculates, calculated result is accurate, improves system emulation
The precision for calculating analysis completes off-line calculation to the technology leap in line computation.The system can not only grasp current system
Operating condition, additionally it is possible to analyze power grid potential risk, carry out prediction failure, and provide aid decision suggestion, be management and running people
Member's discovery potential risk, grasps operation of power networks trend, successfully manages burst accident and provides strong help, but since auxiliary is determined
The real-time of plan and adaptability Shortcomings with other control functions not yet realize that aid decision closed loop executes at present.
AGC function makes generating automatic tracking load variations by the active power of generating set in control dispatcher-controlled territory, ties up
Holding system frequency is rated value, and interconnecting ties is maintained to exchange power, realizes the control of electric network active frequency, maintains system frequency matter
Tie line Power and the control of local power net inner section transmission power between amount, interconnected network.
AVC function calculates the optimal setting of each node voltage in power grid by the idle work optimization to power grid in real time, according to
It contributes according to the setting value to generator reactive and Substation Reactive-power Compensation equipment switching controls, to realize reactive voltage
Hierarchical and regional balance and control guarantee the voltage security and quality of entire power grid.
Load batch control function improves scheduling emergency disposal level for emergencies such as reply power grid accident, exceptions,
Ensure that power network safety operation, regulating and controlling mechanisms at different levels are based on smart grid Dispatching Control System, deploys load batch and control
System.When accident abnormality occurs for power grid, the load batch that junior's regulating and controlling mechanism is assigned according to higher level's regulating and controlling mechanism controls target value
Or one's respective area grid operating conditions start load batch control function, generate load batch control program, confirm errorless rear execution
Operation.It, can be according to difference again if load control system amount not up to controls target value after load batch control operational order is finished
Secondary generation load batch control program simultaneously executes operation again, it is ensured that full-amount to complete load control system requirement.But it is directed to thing at present
Therefore load control objective be to be determined offline according to operating experience, it is online to cut or owe the problem of cutting there may be crossing when executing.
Therefore, it is necessary to study the load control system based on on-line security and stability analysis to refine computing technique.
Summary of the invention
To solve problems of the prior art, under the overall situation of extra-high voltage alternating current-direct current mixed connection access, the present invention is first
It first constructs a safety on line early warning and aid decision Closed loop Control realizes frame, and be based on the realization frame, provide one
The electric network fault fast and stable control method of kind automatic synchronization control can adapt to bulk power grid operation control needs, and in power grid
It can realize that the fast and stable of power grid controls by " one-touch " operation when catastrophe failure occurs.
A kind of electric network fault fast and stable control method of automatic synchronization control provided by the invention, specifically includes following step
It is rapid:
Step 1 obtains regional power grid model and regional power grid Data of State Estimation every the first preset time period；
Step 2 obtains the whole network model and the whole network Data of State Estimation comprising outer net every the second preset time period；
Step 3, according to the difference of powernet safety analysis and forecast failure safety analysis demand, select the area respectively
Domain electric network model and regional power grid Data of State Estimation or the whole network model comprising outer net and the whole network Data of State Estimation point
It Zuo Wei not calculating online data；
Step 4, according to the calculating online data, carry out powernet safety analysis and forecast failure safety analysis,
Obtain analysis result and aid decision strategy；
Step 5 is analyzed according to described as a result, by AGC, AVC and load lot control system according to the aid decision
Strategy carries out closed-loop control to power grid.
Further, the powernet safety analysis in the step 4 includes:
According to the calculating online data, judge mains frequency within the scope of regional power grid, alternating current circuit, transformer and
Transmission cross-section load whether be more than within the scope of respective pre-set limit and regional power grid busbar voltage whether default allow model
In enclosing.
Further, the forecast failure safety analysis in the step 4 includes:
According to the calculating online data, alternating current circuit forecast failure, the transformer within the scope of regional power grid are envisioned
Failure and extra-high voltage alternating current-direct current are latched forecast failure, Transient Stability Evaluation and static security analysis are carried out, after judging forecast failure
Regional power grid whether there is generator rotor angle destabilization problems and/or Voltage Instability problem.
Further, the aid decision strategy includes: that the mains frequency based on AGC and load batch control function is got over
Promptly closing in the case of limit, cross section limit and the urgent closed-loop control under Overload and the power grid out-of-limit based on AVC
Ring control and the preventative closed-loop control of power grid based on AGC and AVC.
Further, the step 5 specifically includes:
If analysis result is indicated without controlling generator output, busbar voltage, transmission cross-section load, not to
AGC, AVC and load lot control system sending strategy switching control order, AGC, AVC, load lot control system still according to
Former control strategy controls power grid；
If analyzing result indicates that closed-loop control need to be carried out to power grid, sent to AGC, AVC and load lot control system
The former controlling tactic switch of AGC, AVC and load lot control system is auxiliary decision strategy, root by tactful switching control order
After so that operation of power networks state is restored normal according to the aid decision strategy, to described in AGC, AVC, the transmission of load lot control system
The aid decision strategy is switched to former control strategy by tactful switching control order；
Wherein, the tactful switching control order is used to indicate AGC, AVC and load lot control system and controls plan in original
Slightly switched between aid decision strategy.
Further, the mains frequency based on AGC and load batch control function in the step 5 is out-of-limit, section is got over
Urgent closed-loop control under limit and Overload specifically includes:
If it is determined that the mains frequency, alternating current circuit, transformer and transmission cross-section load within the scope of regional power grid are out-of-limit, then hold
Row step 1.1 and step 1.2；
After having executed the step 1.1 and step 1.2, if determining that out-of-limit problem is not present in next calculating cycle,
Then follow the steps 1.3；If determining to then follow the steps 1.4 and step 1.5 there are still out-of-limit problem in next calculating cycle；
After executing the step 1.4 and step 1.5, if determining that out-of-limit problem is not present in next calculating cycle, no
Control target is issued again gives load lot control system；
Wherein, the step 1.1 to step 1.5 is respectively as follows:
Sensitivity of the generator output to out-of-limit equipment in step 1.1, zoning power grid scope selects sensitivity big
Control unit is used as in the generator of given threshold；
Step 1.2 calculates the generator collection for needing to control power output in the control unit, by the generator collection
It is sent to AGC with the power output limit value of each generator, carries out closed loop in the way of the limitation generator upper limit and/or lower limit by AGC
Control；
Step 1.3, issue control instruction release to AGC to the generator output upper limit each in the generator collection and/or
The closed-loop control of lower limit；
Sensitivity of each load control system node to out-of-limit equipment in step 1.4, calculated load lot control system, selection
Sensitivity is greater than the load control system node of given threshold as control object；
Step 1.5 calculates the load bus set for needing to control power, by the load bus set for needing to control and needs
The load to be cut off is sent to load lot control system, is controlled by load of the load lot control system to load bus
System.
Further, the urgent closed-loop control in the case of the power grid out-of-limit based on AVC in the step 5 is specifically wrapped
It includes:
If it is determined that busbar voltage is out-of-limit within the scope of regional power grid, 2.1 are thened follow the steps；
After having executed the step 2.1, if determining that the out-of-limit problem of busbar voltage is not present in next calculating cycle,
Execute step 2.2；
Wherein, the step 2.1 and step 2.2 are respectively as follows:
Step 2.1 filters out out-of-limit bus nodes, and the bus nodes and control reference voltage are sent to AVC, by
AVC carries out closed-loop control in the way of control bus upper voltage limit and/or lower limit；
Step 2.2 issues control instruction and releases to AVC to the bus voltage upper limits of the bus nodes and/or lower limit
Closed-loop control.
Further, the preventative closed-loop control of the power grid based on AGC, AVC in the step 5 specifically includes:
If it is determined that forecast failure rear region power grid thens follow the steps 3.1 and step 3.2 there are generator rotor angle destabilization problems；
After having executed the step 3.1 and step 3.2, if determining forecast failure rear region electricity in next calculating cycle
Generator rotor angle destabilization problems are not present in net, then follow the steps 3.3；
Wherein, the step 3.1 to step 3.3 is respectively as follows:
The sensitivity of step 3.1, each generator output of zoning power grid to generator rotor angle unstability selects sensitivity to be greater than setting
The unit of threshold value is as control unit；
Step 3.2 calculates the generator collection for needing to control power output in the control unit, by the generator collection
And the power output upper limit value of each generator is sent to AGC, carries out closed loop control in the way of controlling generator output upper limit value by AGC
System；
Step 3.3, under issue a command to AGC and release closed loop control to generator output upper limit value each in the generator collection
System.
Further, the preventative closed-loop control of the power grid based on AGC, AVC in the step 5 is specific further include:
If it is determined that forecast failure rear region power grid has Voltage Instability, 4.1 and step 4.2 are thened follow the steps；
After having executed the step 4.1 and step 4.2, if determining forecast failure rear region electricity in next calculating cycle
Voltage Instability problem is not present in net, thens follow the steps 4.3；
Wherein, the step 4.1 to step 4.3 is respectively as follows:
Step 4.1 calculates sensitivity of each bus nodes voltage to Voltage Instability, filters out sensitivity greater than given threshold
Critical busses；
Step 4.2 calculates the bus nodes for needing to control voltage, will need to control the bus nodes and voltage control of voltage
Lower limit processed is sent to AVC, carries out closed-loop control in the way of control bus lower voltage limit by AVC；
Step 4.3, under issue a command to AVC and release closed-loop control to the busbar voltage lower limits of the bus nodes.
Beneficial effects of the present invention:
The electric network fault fast and stable control method of automatic synchronization control provided by the invention, it is existing by comprehensively utilizing
Powernet Safety Analysis System, AGC, AVC and network load lot control system are accessed in power grid extra-high voltage alternating current-direct current mixed connection
Overall situation under, when power grid occurs or when in the case of will breaking down, without additionally increasing new grid equipment, can be realized
Safety on line early warning decision closed-loop control to electric network fault is needed with adapting to current extra-high voltage interconnected network scheduling controlling operation
It wants.Analysis of the regulating and controlling mechanism to power grid is reinforced and is promoted in development of the present invention for promotion extra-high voltage interconnected network dispatching technique
Assessment and the quick disposing capacity of power grid catastrophe failure ensure power network safety operation, realize peopleware, technical support, tune
Comprehensive raising of degree control operation level etc. is of great significance.
Detailed description of the invention
Fig. 1 is that the process of the electric network fault fast and stable control method of automatic synchronization provided in an embodiment of the present invention control is shown
It is intended to；
Fig. 2 is the stream of the electric network fault fast and stable control method for the automatic synchronization control that further embodiment of this invention provides
Journey schematic diagram.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, technical solution in the embodiment of the present invention are explicitly described, it is clear that described embodiment is a part of the invention
Embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making wound
Every other embodiment obtained under the premise of the property made labour, shall fall within the protection scope of the present invention.
The electric network fault fast and stable control method of automatic synchronization control proposed by the present invention, firstly, carrying out powernet
Safety analysis and forecast failure safety analysis find the safety problem under power grid real-time status and forecast failure, propose that auxiliary is determined
Plan scheme；Then, according to aid decision scheme, realize that mains frequency is out-of-limit, transmission of electricity is disconnected using AGC and load batch control function
Urgent closed-loop control under face is out-of-limit and equipment Overload is realized urgent in the case of power grid out-of-limit using AVC
Closed-loop control, and preventative closed-loop control is carried out using AGC and AVC, it eliminates under the forecast failures such as generator rotor angle unstability, Voltage Instability
Safety problem.
Fig. 1 is that the process of the electric network fault fast and stable control method of automatic synchronization provided in an embodiment of the present invention control is shown
It is intended to.As shown in Figure 1, method includes the following steps:
S101, regional power grid model and regional power grid Data of State Estimation are obtained every the first preset time period；
S102, the whole network model and the whole network Data of State Estimation comprising outer net are obtained every the second preset time period；
Specifically, it first sets the period and is generally less than the second pre- preset time period, optionally, the setting of the first preset time period
It is 2 minutes, the second preset time period is set as 5 minutes.Regional power grid model and regional power grid Data of State Estimation are by other
The file that relative application software is automatically generated with the title, type and format arranged, and it is placed in specified storage location, it obtains
The period is taken to be determined by the file generated period of other relative application softwares；The whole network model and the whole network state estimation comprising outer net
Data are the files transmitted by higher level's scheduling institution with title, type and the format timing arranged, and are placed in specified storage
Position, acquisition time section are determined by higher level's scheduling institution supported file transmission cycle time.
S103, according to the difference of powernet safety analysis and forecast failure safety analysis demand, select the area respectively
Domain electric network model and regional power grid Data of State Estimation or the whole network model comprising outer net and the whole network Data of State Estimation point
It Zuo Wei not calculating online data；
It should be noted that if obtain comprising outer net the whole network model and the whole network Data of State Estimation second it is default when
Between section when can achieve the requirement of the first preset time period, can be only with the whole network model comprising outer net and the whole network state estimative figure
According to as general calculating online data.
S104, according to the calculating online data, carry out powernet safety analysis and forecast failure safety analysis, obtain
To analysis result and aid decision strategy；
S105, it is analyzed according to described as a result, by AGC, AVC and load lot control system according to the aid decision plan
Closed-loop control slightly is carried out to power grid.
The electric network fault fast and stable control method of automatic synchronization control proposed by the present invention, it is existing by comprehensively utilizing
Powernet Safety Analysis System, AGC, AVC and network load lot control system are accessed in power grid extra-high voltage alternating current-direct current mixed connection
Overall situation under, when power grid occurs or when in the case of will breaking down, without additionally increasing new grid equipment, can be realized
Safety on line early warning decision closed-loop control to electric network fault is needed with adapting to current extra-high voltage interconnected network scheduling controlling operation
It wants.
On the basis of the above embodiments, the present invention provides another embodiment, in conjunction with Fig. 2, the embodiment mainly include with
Lower step:
S201 to S203: with step S101 to step S103；
S204, powernet safety analysis, relate generally to following analysis target: judging the power grid frequency within the scope of regional power grid
Whether rate, alternating current circuit, transformer and transmission cross-section load are more than bus within the scope of respective pre-set limit and regional power grid
Whether voltage is in default allowed band；
And, it is contemplated that failure safe analysis relates generally to following analysis target: to the alternating current circuit within the scope of regional power grid
Forecast failure, transformer forecast failure and extra-high voltage alternating current-direct current are latched forecast failure, carry out Transient Stability Evaluation and static security
Analysis judges forecast failure rear region power grid with the presence or absence of generator rotor angle destabilization problems and/or Voltage Instability problem.
Aid decision strategy specifically includes that the mains frequency based on AGC and load batch control function is out-of-limit, cross section limit
With in the case of the urgent closed-loop control under Overload and the power grid out-of-limit based on AVC urgent closed-loop control and base
In the preventative closed-loop control of the power grid of AGC and AVC.
Specifically, the purpose of the aid decision strategy is: firstly, be calculated in power grid control to
Control object (such as generator collection, bus nodes and load bus set for needing to control etc.) and control target value (such as
The power output limit value of each generator in generator collection, in busbar voltage limit value and load bus set each load bus load
Deng)；Then, the object to be controlled and control target value are sent to AGC, AVC and load lot control system；Finally, utilizing
AGC, AVC and load lot control system carry out closed-loop control to power grid, keep power system restoration normal.
If S205, analysis result are (for example, the mains frequency, alternating current circuit, transformer and transmission of electricity within the scope of regional power grid are disconnected
Face load and busbar voltage are not got over line or are in allowed band) it indicates without to generator output, bus electricity
Pressure, transmission cross-section load are controlled, then not to AGC, AVC and load lot control system sending strategy switching control order,
AGC, AVC, load lot control system still control power grid according to former control strategy；
If analyzing result (for example, the mains frequency, alternating current circuit, transformer and transmission cross-section within the scope of regional power grid are negative
At least one of lotus and busbar voltage get over line or exceed allowed band, and operation of power networks state is abnormal) indicate need to be according to
Aid decision strategy carries out closed-loop control to power grid, then to AGC, AVC and load lot control system sending strategy switching control
The former controlling tactic switch of AGC, AVC and load lot control system is auxiliary decision strategy, is determined according to the auxiliary by order
Plan strategy carries out after closed-loop control makes operation of power networks state restore normal, and automatic (can also be after manual confirmation) be to AGC, AVC, negative
Lotus lot control system sends the tactful switching control order, and the aid decision strategy is switched to former control strategy；
Wherein, the tactful switching control order is used to indicate AGC, AVC and load lot control system and controls plan in original
Slightly switched between aid decision strategy.
As shown in the above, extra-high voltage alternating current-direct current mixed connection access overall situation under, the present invention by building one
Line safe early warning and aid decision Closed loop Control realize frame, can adapt to bulk power grid operation control needs, and in power grid
It can realize that the fast and stable of power grid controls by " one-touch " operation when catastrophe failure occurs.
The aid decision strategy being related in the various embodiments described above is specifically introduced below.The aid decision strategy packet
Include: the mains frequency based on AGC and load batch control function is out-of-limit, the urgent closed loop control under cross section limit and Overload
Urgent closed-loop control in the case of system and the power grid out-of-limit based on AVC and the preventative closed loop of power grid based on AGC and AVC
Control.
Wherein, the mains frequency of (1) based on AGC and load batch control function is out-of-limit, cross section limit and Overload
Under urgent closed-loop control specifically include:
If it is determined that the mains frequency, alternating current circuit, transformer and transmission cross-section load within the scope of regional power grid are out-of-limit, then hold
Row step 1.1 and step 1.2；
After having executed the step 1.1 and step 1.2, if determining that out-of-limit problem is not present in next calculating cycle,
Then follow the steps 1.3；If determining to then follow the steps 1.4 and step 1.5 there are still out-of-limit problem in next calculating cycle；
After executing the step 1.4 and step 1.5, if determining that out-of-limit problem is not present in next calculating cycle, no
Control target is issued again gives load lot control system.
Specifically, calculating cycle refers to implementation procedure composed by step S101 to step S104.That is, working as power grid
When failure, by using urgent closed-loop control, (such as step 1.1, step 1.2, step 1.4 and step 1.5) then need pair
Control result is verified, and whether examination power grid restores normally in next calculating cycle, if restoring normal, releases closed loop control
System.
Wherein, the step 1.1 to step 1.5 is respectively as follows:
Sensitivity of the generator output to out-of-limit equipment in step 1.1, zoning power grid scope selects sensitivity big
Control unit is used as in the generator of given threshold；
Step 1.2 calculates the generator collection for needing to control power output in the control unit, by the generator collection
It is sent to AGC with the power output limit value of each generator, carries out closed loop in the way of the limitation generator upper limit and/or lower limit by AGC
Control；
Step 1.3, issue control instruction release to AGC to the generator output upper limit each in the generator collection and/or
The closed-loop control of lower limit；
Sensitivity of each load control system node to out-of-limit equipment in step 1.4, calculated load lot control system, selection
Sensitivity is greater than the load control system node of given threshold as control object；
Step 1.5 calculates the load bus set for needing to control power, by the load bus set for needing to control and needs
The load to be cut off is sent to load lot control system, is controlled by load of the load lot control system to load bus
System.
(2) the urgent closed-loop control in the case of the power grid out-of-limit based on AVC specifically includes:
If it is determined that busbar voltage is out-of-limit within the scope of regional power grid, 2.1 are thened follow the steps；
After having executed the step 2.1, if determining that the out-of-limit problem of busbar voltage is not present in next calculating cycle,
Execute step 2.2；
Wherein, the step 2.1 and step 2.2 are respectively as follows:
Step 2.1 filters out out-of-limit bus nodes, and the bus nodes and control reference voltage are sent to AVC, by
AVC carries out closed-loop control in the way of control bus upper voltage limit and/or lower limit；
Step 2.2 issues control instruction and releases to AVC to the bus voltage upper limits of the bus nodes and/or lower limit
Closed-loop control.
(3) the preventative closed-loop control of power grid based on AGC and AVC, for generator rotor angle destabilization problems and Voltage Instability problem point
It Cai Yong not two different prevention closed-loop control processes.
For generator rotor angle destabilization problems, prevents closed-loop control process and specifically includes:
If it is determined that forecast failure rear region power grid thens follow the steps 3.1 and step 3.2 there are generator rotor angle destabilization problems；
After having executed the step 3.1 and step 3.2, if determining forecast failure rear region electricity in next calculating cycle
Generator rotor angle destabilization problems are not present in net, then follow the steps 3.3；
Wherein, the step 3.1 to step 3.3 is respectively as follows:
The sensitivity of step 3.1, each generator output of zoning power grid to generator rotor angle unstability selects sensitivity to be greater than setting
The unit of threshold value is as control unit；
Step 3.2 calculates the generator collection for needing to control power output in the control unit, by the generator collection
And the power output upper limit value of each generator is sent to AGC, carries out closed loop control in the way of controlling generator output upper limit value by AGC
System；
Step 3.3, under issue a command to AGC and release closed loop control to generator output upper limit value each in the generator collection
System.
For Voltage Instability problem, prevents closed-loop control process and specifically includes:
If it is determined that forecast failure rear region power grid has Voltage Instability, 4.1 and step 4.2 are thened follow the steps；
After having executed the step 4.1 and step 4.2, if determining forecast failure rear region electricity in next calculating cycle
Voltage Instability problem is not present in net, thens follow the steps 4.3；
Wherein, the step 4.1 to step 4.3 is respectively as follows:
Step 4.1 calculates sensitivity of each bus nodes voltage to Voltage Instability, filters out sensitivity greater than given threshold
Critical busses；
Step 4.2 calculates the bus nodes for needing to control voltage, will need to control the bus nodes and voltage control of voltage
Lower limit processed is sent to AVC, carries out closed-loop control in the way of control bus lower voltage limit by AVC；
Step 4.3, under issue a command to AVC and release closed-loop control to the busbar voltage lower limits of the bus nodes.
In order to verify the validity for the power grid fast and stable control method that automatic synchronization provided by the invention controls, with Henan
It is analyzed for the operation data of power grid load peak one day period.
The safety and stability problem found by contingency analysis is as shown in table 1.It is calculated using method of the invention,
It is as shown in table 2 to obtain Control Measure.
The safety and stability problem found by safety on line analysis is as shown in table 3.It is calculated using method of the invention,
It is as shown in table 4 to obtain emergent control measure.
1 Henan Electric Power System forecast failure safety problem of table
| Serial number | Failure-description | Safety and stability problem |
| 1 | Male II line of Central China Ji, the male I line double line down of Central China Ji | Generator rotor angle unstability |
| 2 | DC bipolar block in it | Henan south Voltage Instability |
2 Henan Electric Power System forecast failure aid decision measure of table
3 Henan Electric Power System actual time safety problem of table
| Serial number | Safety and stability problem |
| 1 | Ma Sidong send cross section limit 100MW |
| 2 | The female voltage in the south the osmanthus Gui Yuanzhan/220kV., Henan 220kV is less than 210kV |
4 Henan Electric Power System emergent control policy making steps of table
As shown in the above, the electric network fault fast and stable control method of automatic synchronization control provided by the invention, tool
Have it is following the utility model has the advantages that
1) it can be based on power grid real-time running state, pass through safety on line analysis and forecast failure safety analysis, discovery electricity
The safety problem of net.
2) it can be controlled for the safety problem under Henan Electric Power System malfunction by coordinating AGC, AVC and load batch
System realizes the closed-loop control to state of emergency such as frequency out-of-limit, line section and the out-of-limit, voltage out-of-limits of equipment, quickly makes electricity
Network recovery is to normal operating condition.
3) it can be realized by AGC, AVC to generator rotor angle unstability, Voltage Instability for the safety problem under power grid forecast failure
Prevention and control closed loop, the safety and stability for improving power grid is horizontal.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (9)
1. a kind of electric network fault fast and stable control method of automatic synchronization control characterized by comprising
Step 1 obtains regional power grid model and regional power grid Data of State Estimation every the first preset time period；
Step 2 obtains the whole network model and the whole network Data of State Estimation comprising outer net every the second preset time period；
Step 3, according to the difference of powernet safety analysis and forecast failure safety analysis demand, select the region electricity respectively
Pessimistic concurrency control and regional power grid Data of State Estimation or the whole network model comprising outer net and the whole network Data of State Estimation are as meter
Calculation online data；
Step 4, according to the calculating online data, carry out powernet safety analysis and forecast failure safety analysis, obtain
Analyze result and aid decision strategy；
Step 5 is analyzed according to described as a result, by AGC, AVC and load lot control system according to the aid decision strategy
Closed-loop control is carried out to power grid.
2. the method according to claim 1, wherein the powernet safety analysis in the step 4 includes:
According to the calculating online data, mains frequency, alternating current circuit, transformer and the transmission of electricity within the scope of regional power grid are judged
Section load whether be more than within the scope of respective pre-set limit and regional power grid busbar voltage whether in default allowed band
It is interior.
3. the method according to claim 1, wherein the forecast failure safety analysis in the step 4 includes:
According to the calculating online data, to alternating current circuit forecast failure, the transformer forecast failure within the scope of regional power grid
It is latched forecast failure with extra-high voltage alternating current-direct current, Transient Stability Evaluation and static security analysis is carried out, judges forecast failure rear region
Power grid whether there is generator rotor angle destabilization problems and/or Voltage Instability problem.
4. according to the method in claim 2 or 3, which is characterized in that the aid decision strategy includes: based on AGC and to bear
The mains frequency of lotus batch control function is out-of-limit, cross section limit and urgent closed-loop control under Overload and based on AVC's
Urgent closed-loop control in the case of power grid out-of-limit and the preventative closed-loop control of the power grid based on AGC and AVC.
5. the method according to claim 1, wherein the step 5 specifically includes:
If analysis result is indicated without controlling generator output, busbar voltage, transmission cross-section load, not to AGC,
AVC and load lot control system sending strategy switching control order, AGC, AVC, load lot control system are still controlled according to original
System strategy controls power grid；
If analyzing result indicates that closed-loop control need to be carried out to power grid according to aid decision strategy, to AGC, AVC and load batch
Control system sending strategy switching control order, supplemented by the former controlling tactic switch of AGC, AVC and load lot control system
Decision strategy is helped, after so that operation of power networks state is restored normal according to the aid decision strategy, is controlled to AGC, AVC, load batch
System processed sends the tactful switching control order, and the aid decision strategy is switched to former control strategy；
Wherein, the tactful switching control order be used to indicate AGC, AVC and load lot control system former control strategy with
It is switched between aid decision strategy.
6. according to the method described in claim 4, it is characterized in that, controlling function based on AGC and load batch in the step 5
Can mains frequency is out-of-limit, the urgent closed-loop control under cross section limit and Overload specifically includes:
If it is determined that the mains frequency, alternating current circuit, transformer and transmission cross-section load within the scope of regional power grid are out-of-limit, then step is executed
Rapid 1.1 and step 1.2；
After having executed the step 1.1 and step 1.2, if determining that out-of-limit problem is not present in next calculating cycle, hold
Row step 1.3；If determining to then follow the steps 1.4 and step 1.5 there are still out-of-limit problem in next calculating cycle；
After executing the step 1.4 and step 1.5, if next calculating cycle determine be not present out-of-limit problem, no longer under
Hair control target gives load lot control system；
Wherein, the step 1.1 to step 1.5 is respectively as follows:
Sensitivity of the generator output to out-of-limit equipment in step 1.1, zoning power grid scope selects sensitivity to be greater than and sets
The generator of threshold value is determined as control unit；
Step 1.2 calculates the generator collection for needing to control power output in the control unit, by the generator collection and respectively
The power output limit value of generator is sent to AGC, carries out closed-loop control in the way of the limitation generator upper limit and/or lower limit by AGC；
Step 1.3 issues control instruction to AGC releasing to the generator output upper limit each in the generator collection and/or lower limit
Closed-loop control；
Sensitivity of each load control system node to out-of-limit equipment in step 1.4, calculated load lot control system selects sensitive
Degree is greater than the load control system node of given threshold as control object；
Step 1.5 calculates the load bus set for needing to control power, will need the load bus set controlled and needs to cut
The load removed is sent to load lot control system, is controlled by load of the load lot control system to load bus.
7. according to the method described in claim 4, it is characterized in that, power grid out-of-limit feelings based on AVC in the step 5
Urgent closed-loop control under condition specifically includes:
If it is determined that busbar voltage is out-of-limit within the scope of regional power grid, 2.1 are thened follow the steps；
After having executed the step 2.1, if determining that the out-of-limit problem of busbar voltage is not present in next calculating cycle, execute
Step 2.2；
Wherein, the step 2.1 and step 2.2 are respectively as follows:
Step 2.1 filters out out-of-limit bus nodes, the bus nodes and control reference voltage is sent to AVC, by AVC
Closed-loop control is carried out in the way of control bus upper voltage limit and/or lower limit；
Step 2.2 issues control instruction to AVC releasing to the bus voltage upper limit of the bus nodes and/or the closed loop of lower limit
Control.
8. according to the method described in claim 4, it is characterized in that, the power grid based on AGC and AVC in the step 5 prevents
Property closed-loop control specifically includes:
If it is determined that forecast failure rear region power grid thens follow the steps 3.1 and step 3.2 there are generator rotor angle destabilization problems；
After having executed the step 3.1 and step 3.2, if determining forecast failure rear region power grid not in next calculating cycle
There are generator rotor angle destabilization problems, then follow the steps 3.3；
Wherein, the step 3.1 to step 3.3 is respectively as follows:
The sensitivity of step 3.1, each generator output of zoning power grid to generator rotor angle unstability selects sensitivity to be greater than given threshold
Unit as control unit；
Step 3.2 calculates the generator collection for needing to control power output in the control unit, by the generator collection and respectively
The power output upper limit value of generator is sent to AGC, carries out closed-loop control in the way of controlling generator output upper limit value by AGC；
Step 3.3, under issue a command to AGC and release closed-loop control to generator output upper limit value each in the generator collection.
9. according to the method described in claim 4, it is characterized in that, the power grid based on AGC and AVC in the step 5 prevents
Property closed-loop control is specific further include:
If it is determined that forecast failure rear region power grid has Voltage Instability, 4.1 and step 4.2 are thened follow the steps；
After having executed the step 4.1 and step 4.2, if determining forecast failure rear region power grid not in next calculating cycle
There are problems that Voltage Instability, thens follow the steps 4.3；
Wherein, the step 4.1 to step 4.3 is respectively as follows:
Step 4.1 calculates sensitivity of each bus nodes voltage to Voltage Instability, filters out the pass that sensitivity is greater than given threshold
Key bus；
Step 4.2 calculates the bus nodes for needing to control voltage, will be under the bus nodes and voltage control that need to control voltage
Limit is sent to AVC, carries out closed-loop control in the way of control bus lower voltage limit by AVC；
Step 4.3, under issue a command to AVC and release closed-loop control to the busbar voltage lower limits of the bus nodes.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350595A (en) * | 2019-06-19 | 2019-10-18 | 国网河南省电力公司 | The load high-speed decision control method for maintaining subregion section stable under accident condition |
| CN111030107A (en) * | 2019-12-26 | 2020-04-17 | 中国电力科学研究院有限公司 | Multi-transmission-section cooperative control assistant decision early warning control method and system |
| CN111146779A (en) * | 2019-12-25 | 2020-05-12 | 国家电网公司西北分部 | Flexible safety control method and system for large power grid with sequential faults of power equipment |
| CN111697562A (en) * | 2020-04-27 | 2020-09-22 | 中国电力科学研究院有限公司 | SVM-based transient stability prevention control strategy generation method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120179301A1 (en) * | 2010-09-17 | 2012-07-12 | Aivaliotis Sarantos K | System and method for power grid management |
| CN102938588A (en) * | 2012-12-10 | 2013-02-20 | 上海市电力公司 | Intelligent power grid safety and stability early-warning and control system |
| CN103166219A (en) * | 2013-01-30 | 2013-06-19 | 中国电力科学研究院 | Power grid on-line decision-stabilizing control system and control method based on super real-time emulation |
| CN103400302A (en) * | 2013-07-01 | 2013-11-20 | 国家电网公司 | Risk perception and early warning method and system for cascading failures of wind power base |
| CN105205571A (en) * | 2015-10-20 | 2015-12-30 | 河海大学 | Risk-considered urban power network operation security assessment method |
| CN106099906A (en) * | 2016-05-13 | 2016-11-09 | 国电南瑞科技股份有限公司 | A kind of power system safety and stability online integrated campaign method |
-
2018
- 2018-12-26 CN CN201811603633.6A patent/CN109494738B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120179301A1 (en) * | 2010-09-17 | 2012-07-12 | Aivaliotis Sarantos K | System and method for power grid management |
| CN102938588A (en) * | 2012-12-10 | 2013-02-20 | 上海市电力公司 | Intelligent power grid safety and stability early-warning and control system |
| CN103166219A (en) * | 2013-01-30 | 2013-06-19 | 中国电力科学研究院 | Power grid on-line decision-stabilizing control system and control method based on super real-time emulation |
| CN103400302A (en) * | 2013-07-01 | 2013-11-20 | 国家电网公司 | Risk perception and early warning method and system for cascading failures of wind power base |
| CN105205571A (en) * | 2015-10-20 | 2015-12-30 | 河海大学 | Risk-considered urban power network operation security assessment method |
| CN106099906A (en) * | 2016-05-13 | 2016-11-09 | 国电南瑞科技股份有限公司 | A kind of power system safety and stability online integrated campaign method |
Non-Patent Citations (2)
| Title |
|---|
| 徐泰山: "互联电网预防控制和紧急控制在线预决策系统", 《电力系统自动化》 * |
| 潘鹏飞: "《调度自动化系统与运维技术》", 31 August 2018, 东北大学出版社 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350595A (en) * | 2019-06-19 | 2019-10-18 | 国网河南省电力公司 | The load high-speed decision control method for maintaining subregion section stable under accident condition |
| CN110350595B (en) * | 2019-06-19 | 2023-10-27 | 国网河南省电力公司 | Load fast decision control method for maintaining stable section of subarea in accident state |
| CN111146779A (en) * | 2019-12-25 | 2020-05-12 | 国家电网公司西北分部 | Flexible safety control method and system for large power grid with sequential faults of power equipment |
| CN111146779B (en) * | 2019-12-25 | 2024-02-23 | 国家电网公司西北分部 | Flexible safety control method and system for large power grid with successive faults of power equipment |
| CN111030107A (en) * | 2019-12-26 | 2020-04-17 | 中国电力科学研究院有限公司 | Multi-transmission-section cooperative control assistant decision early warning control method and system |
| CN111030107B (en) * | 2019-12-26 | 2022-07-01 | 中国电力科学研究院有限公司 | Multi-transmission-section cooperative control assistant decision early warning control method and system |
| CN111697562A (en) * | 2020-04-27 | 2020-09-22 | 中国电力科学研究院有限公司 | SVM-based transient stability prevention control strategy generation method and device |
| CN111697562B (en) * | 2020-04-27 | 2022-11-11 | 中国电力科学研究院有限公司 | SVM-based transient stability prevention control strategy generation method and device |
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