CN106154084A - Network load exception and operation risk real-time monitoring and early warning method - Google Patents
Network load exception and operation risk real-time monitoring and early warning method Download PDFInfo
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Abstract
The invention discloses a kind of network load exception and operation risk real-time monitoring and early warning method, set up the step of expert knowledge library including acquisition data；Obtain the step of real-time telemetry remote signalling amount；Determine operation of power networks state, it is judged that data fluctuations and Flushing status the step reported to the police；The step of identification operation of power networks topological structure；Identification electrical network weak link and security risk grade the step reported to the police；The control nargin judging operation of power networks section the step reported to the police.The present invention is based on the stable state supervision to plant stand telemetry, dynamic monitoring and assessment electrical network real time execution weak spot, data are not refreshed, network load fluctuation, low-frequency oscillation, safe operation of electric network risk and control the abnormal conditions such as stability margin is not enough and carry out auxiliary record and alarm prompt, for scheduling, operator on duty monitors offer important evidence in real time, alleviate operator on duty's working strength, effectively control operation of power networks risk, provide science decision for accident treatment.
Description
Technical field
The invention belongs to power system automatic field, be specifically related to a kind of network load exception and operation risk is supervised in real time
Control method for early warning.
Background technology
Along with the fast development of China's interconnection power system and moving forward steadily of extra-high voltage grid construction, operation of power networks
Technical merit and complexity are more and more higher, and the difficulty that operation of power networks controls is increasing；
1) Traditional Man monitors the most competent modern extensive interconnected network requirement of important service data.It is responsible for provincial power network frequency
Rate and the daily supervision of voltage and the scheduling operator on duty of control, take and always generate (confession) electric real-time curve, each tracking machine to saving net quarter
Group has in real time, idle exerts oneself, large reservoir goes out, each plant stand busbar voltage and transmission line of electricity are netted by reservoir inflow and real time water level, province
Have, idle and important operation section tidal current carries out monitoring and participate in adjust.Along with electrical network scale increases day by day, monitor number per capita
Being continuously increased according to amount, Traditional Man naked eyes have been difficult to the supervision of the most complicated competent real-time running data；
2) topological structure of electric becomes increasingly complex.In recent years in power grid construction, for saving Financial cost, the power transmission line of parallel lines on same tower
Road gets more and more, and its different name phase short trouble exists the operation risk of N-2, and distinguishes topological structure of electric weak spot intelligence at present
The automatic technology support means known are limited, and tradition relies on the experience scheduling method of scheduling operator on duty and is difficult to find and control electricity
The operation risk that net is hidden；
3) network stability control regulation is increasingly harsher.Power system operating mode professional is for electric network composition and electric load water
Flat, in conjunction with electrical network typical operation modes such as electrical network summer, winters, establishment operation of power networks controls requirement, comprises start-up mode, rotation
Standby requirement, transmission cross-section be normal/and maintenance mode controls limit, the surely control of plant stand Intellectual computer etc..Along with electrical network scale increases day by day
Greatly, the method for operation is day by day flexible, stability contorting regulation the most complicated severe sternly, only remember by scheduling operator on duty be difficult to ensure that right
Operation of power networks stability contorting requires to make the judgement of fast accurate；
4) the abnormal such as load fluctuation of electrical network is the electrical network dynamic stability problems such as the forced power oscillation of typical characteristic, low-frequency oscillation
Day by day highlight.The WAMS constituted based on synchronous phasor measuring device (Phasor Measurement Unit, PMU)
(Wide Area Measurement System, WAMS) has directly measurement node voltage phasor and branch current phasor, number
The advantage such as high according to precision, transmission delay is short, but for state-of-the art, the whole network layout economic problems that PMU brought with
And this two big bottleneck of technical problem being brought the storage process of magnanimity metric data, management and utilization, calculating communication determines
Within the long duration, WAMS still needs to combine based on the number on EMS (Energy Manager System, EMS)
According to gathering and monitoring system (Supervisory Control And Acquisition, SCADA), Power system dynamic process is entered
Row prepares to analyze in real time.
Summary of the invention
It is an object of the invention to provide one can the most effectively analyze topological structure of electric, find that operation of power networks is weak
Point and operation exception risk reporting to the police, thus alleviate operator on duty's working strength, the electrical network that effectively controls operation of power networks risk is born
Lotus exception and operation risk real-time monitoring and early warning method.
This network load exception of present invention offer and operation risk real-time monitoring and early warning method, comprise the steps:
Obtain basic electrical network data and the service data of provincial power network, set up provincial power network and run the step of expert knowledge library；
The step of the electrical network EMS/SCADA real-time telemetry remote signalling amount under acquisition operation of power networks state in real time；
According to the electrical network EMS/SCADA real-time telemetry remote signalling amount obtained, determine putting into operation of electrical network unit, bus, circuit and main transformer
State；Judge fluctuation status and the Flushing status of data, and the data that data fluctuations exception or Refresh Data are abnormal are reported
Alert step；
According to the electrical network EMS obtained and SCADA real-time telemetry remote signalling amount, the step of the topological structure of real-time identification operation of power networks；
Electrical network EMS and SCADA real-time telemetry remote signalling amount according to the operation of power networks topological structure obtained and acquisition, identification electrical network is transported
Weak link in row and security risk grade the step reported to the police；
Electrical network EMS and SCADA real-time telemetry remote signalling amount according to the operation of power networks topological structure obtained and acquisition, it is judged that electrical network is transported
The control nargin of row section, and the step reported to the police is carried out when controlling nargin and being unsatisfactory for requiring.
The basic electrical network data of described provincial power network and service data, including circuit parallel lines on same tower information, transmission cross-section
Control limit, the area power grid method of operation and accident investigation code regulation.
The described area power grid method of operation includes running for various places/city, each 220kV station bus of county/district's electric power, main transformer
Mode, 110kV side open loop point and load prepared auto restart situation and the 110kV side grid power source method of operation.
Described accident investigation code regulation includes that various places/city under Pyatyi and above power grid risk, county/district subtract for load number
Amount, ratio and other improper stoppage in transit events.
Electrical network EMS/SCADA real-time telemetry remote signalling amount under described operation of power networks state, fills including from each plant stand observing and controlling
Put the remote measure and communication amount of the primary equipment of real-time measurement and be forwarded to the data value of main website from higher level, brother regulation and control center.
Described remote measure and communication amount is divided into interconnection trend between important net, Hydropower Unit to gain merit, fired power generating unit is meritorious, contact
Transformer active trend and transmission line of electricity effective power flow.
Between described important net, interconnection trend interconnects and exchanges power disturbance to whole system frequency two-by-two for relating to region
Produce the trend of the section of impact.
Described Hydropower Unit is gained merit and is included accessing the meritorious number of the tracking Hydropower Unit of 220kV electric pressure and above electrical network
According to.
Described fired power generating unit is gained merit and is included accessing the meritorious number of the tracking fired power generating unit of 220kV electric pressure and above electrical network
According to.
The three side effective power flow numbers including the interior 500kV electric pressure main transformer of province's net of described connecting transformer effective power flow
According to.
Described transmission line of electricity effective power flow includes 220kV electric pressure and the effective power flow number of above transmission line of electricity in province's net
According to.
The state that puts into operation of described determination electrical network unit, bus, circuit and main transformer, is specially according to the electrical network EMS/ obtained
SCADA real-time telemetry remote signalling amount, obtain unit, main transformer, bus, the real-time mode of connection of circuit, and be calculated electrical network unit,
The state that puts into operation of bus, circuit and main transformer.
The fluctuation status of described judgement data and Flushing status, and to data fluctuations exception or the number of Refresh Data exception
According to reporting to the police, it is specially and carries out fluctuation status and the judgement of Flushing status for network load data and report to the police.
The described fluctuation status to load data judges and reports to the police, and specifically includes following steps:
A. according to the data obtained, it is judged that load type；
B. according to load type, corresponding fluctuation threshold threshold value is read；
C. the undulate quantity of calculated load data, and judge the size between the undulate quantity of load data and fluctuation threshold threshold value: if
The undulate quantity of load data is more than fluctuation threshold threshold value, then recording this load data is single load data fluctuation suspicious points,
Send single load fluctuation warning；
D. to single load fluctuation suspicious points, according to the size of twice load data before and after it, it is judged that this time load fluctuation is suspicious
Point for forward fluctuation or reversely fluctuates；
E. in statistics load data, the number of times that load data fluctuates continuously, and enter with the frequency threshold value of fluctuation continuously arranged in advance
Row contrast:
If the continuously number of times of fluctuation > continuously fluctuation frequency threshold value and continuously fluctuation be forward, reversely fluctuate regularly, then judge
For low-frequency oscillation suspicious points, and report to the police；Otherwise it is judged to common load fluctuation.
The undulate quantity of described load data, specially uses following rule to calculate:
If load type is interconnection flow data between net, Hydropower Unit is meritorious or fired power generating unit is gained merit, then the ripple of load data
The load data value of momentum=(the load data value of load data value sampling last time of this sampling) sampling/last time；
If load type is connecting transformer effective power flow or transmission line of electricity effective power flow, then the undulate quantity of load data is this
The load data of sampling and the difference of the front load data amount once sampled.
The described Flushing status to load data judges and reports to the police, and specifically includes following steps:
. according to the data obtained, it is judged that load type；
. according to load type, read corresponding data higher limit, lower limit and do not refresh threshold threshold value；
. judge that load data is whether between data higher limit and the lower limit set: if load data is beyond data
Higher limit or less than data lower limit, then assert that this load data is abnormal, and report to the police；
. if load data between data higher limit and the lower limit set, then calculates this load data and adopts with the last time
Difference between the load data of sample；
. the size judging the difference described in step with not refreshing threshold threshold value: if difference is less than not refreshing threshold threshold
Value, then assert that now load data does not refreshes, be designated as a secondary data and do not refresh suspicious points；
. the data that statistics occurs continuously do not refresh the number of suspicious points, if the data occurred continuously do not refresh suspicious points number of times
> warning threshold that sets, then preliminary judgement data within this period do not refresh；
. the most artificial remote measurement combining load data corresponding device analog value suppresses information to enter updated load data
Row real time correction, whether final this load data of judgement does not refreshes: if finally judging, this load data does not refreshes, then push automatically
Change quality of data abnormality alarming.
The topological structure of described identification operation of power networks, specifically includes following steps:
1) obtained tracking power plant, the remote signalling amount of transformer station's wire-outgoing breaker in real time by EMS/SCADA system and judge power network topology
Structure and start-up mode；
2) by EMS/SCADA system obtain grid equipment set, put board information, and with this system set, put the excellent of board information
The principle of the data that first level obtains in real time higher than system, corrects topological structure of electric, and identification obtains opening up of operation of power networks
Flutter structure.
The described weak link in identification operation of power networks and security risk grade are also reported to the police, and specifically include following steps:
1. according to the topological structure of operation of power networks, obtain and be only total to the single of bar line powering by single back transmission line or many times
220kV transformer station or multiple 220kV transformer station group linked together, and described transformer station is constituted set Mi, electrical network
Middle all such transformer station constitutes set M={Mi}；Obtaining bus connection type is double-bus or 3/2 wiring, and because part is female
Line has a power failure and causes the 220kV that runs in single bus-bar operation mode and above power plant and transformer station, and by described power plant and power transformation
Composition of standing set N；
2. number b of the 220KV transformer station comprised in number a of the 220KV transformer station comprised in set M, and set N is obtained；
If a >=1 or b >=1, then judging that electrical network exists security risk, EMS system pushes the warning of Pyatyi grid event risk；
3. check the load type of all transformer stations in set M, comprise the set M of any county-level city j load for loadi, meter
Calculate transformer station set MiCounty-level city's j load of burden accounts for ratio x of county-level city's j total load, obtains transformer station set MiThe county of burden
The user of level city j accounts for total user's ratio y of county-level city j；
4. according to the accident investigation code of state's net, it is determined that whether the value of x and y is more than the threshold value specified: if x or y is more than regulation
Threshold value, then EMS system pushes the warning of level Four grid event risk；
3. and 4. 5. for all transformer stations in set N, step is repeated, the weak link in identification operation of power networks and safety
Risk class is also reported to the police.
The described control nargin judging operation of power networks section is also reported to the police, and specifically includes following steps:
A. require power plant or the power plant group unit operation number of units monitored in specifying according to the stabilization of power grids, set up set of variables Di；
B. electrical network Real-time Load amount F monitored, steady control cutting load amount Q and the definition of step a are required according to the stabilization of power grids in specifying
Power plant or power plant group unit operation number of units Di, index stabilization of power grids regulation, determine each transmission cross-section under current electric grid operation level
Stability limitation [Pi] and the unit of power plant or power plant group reserve spinning reserve amount [Xi]；
C. the size of real-time transmission cross-section Pi and the transmission cross-section stability limitation [Pi] of calculating, and power plant or power plant in real time are compared
The unit spinning reserve Xi of group and the size that spinning reserve amount [Xi] should be reserved: if transmission cross-section stability limitation is more than calculating in real time
Transmission cross-section stability limitation Pi >=[Pi], or the unit spinning reserve of in real time power plant or power plant group is less than reserving spinning reserve
Amount Xi≤[Xi], then EMS system pushes the alarm of stabilization of power grids nargin deficiency.
The dynamic surveillance that the present invention measures independent of PMU, based on the stable state supervision to plant stand telemetry, makes full use of into
Ripe EMS/SCADA technology, by the meritorious tide of primary equipment (unit, main transformer, circuit etc.) in real-time sampling operation of power networks operating mode
The main loads amounts such as stream, and above-mentioned sampled data is carried out background synchronization integration and calculating process, dynamic monitoring and assessment electrical network
Real time execution weak spot, automation data is not refreshed, network load fluctuation, low-frequency oscillation, safe operation of electric network risk higher
And control the abnormal conditions such as stability margin is not enough and carry out auxiliary record and alarm prompt, provide for scheduling operator on duty's prison dish in real time
Another important evidence, provides science decision for accident treatment.The application of the present invention can the most effectively analyze topological structure of electric,
Find operation of power networks weak spot and operation exception risk and report to the police, thus alleviating operator on duty's working strength, effectively control electrical network
Operation risk.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the present invention.
Detailed description of the invention
It is illustrated in figure 1 the method flow diagram of the present invention: this network load exception that the present invention provides and operation risk
Monitoring and early warning method, comprises the steps: in real time
Obtain basic electrical network data and the service data of provincial power network, control limit including circuit parallel lines on same tower information, transmission cross-section
Volume, the area power grid method of operation and accident investigation code regulation etc., set up provincial power network and run the step of expert knowledge library；
The area power grid method of operation includes for various places/city, each 220kV station bus, the main transformer method of operation, the 110kV of county/district's electric power
Side open loop point and load prepared auto restart situation and the 110kV side grid power source method of operation etc.；Accident investigation code regulation includes Pyatyi
And various places/city, county/district subtract for load quantity, ratio and other improper stoppage in transit events etc. under above power grid risk.
The step of the electrical network EMS/SCADA real-time telemetry remote signalling amount under acquisition operation of power networks state in real time；Described electrical network
Electrical network EMS/SCADA real-time telemetry remote signalling amount under running status includes the primary equipment from each plant stand measure and control device real-time measurement
Remote measure and communication amount and be forwarded to the data value of main website from higher level, brother regulation and control center.
And remote measure and communication amount is divided into, and interconnection trend between important net, Hydropower Unit are meritorious, fired power generating unit is meritorious, contact becomes
Depressor effective power flow and transmission line of electricity effective power flow.
Between important net, interconnection trend interconnects and exchanges power disturbance to the generation of whole system frequency two-by-two for relating to region
The trend of the section of impact；Hydropower Unit is gained merit and is included accessing the tracking Hydropower Unit of 220kV electric pressure and above electrical network
Meritorious data；Fired power generating unit is gained merit and is included accessing the meritorious data of the tracking fired power generating unit of 220kV electric pressure and above electrical network；
The three side effective power flow data including the interior 500kV electric pressure main transformer of province's net of connecting transformer effective power flow；Transmission line of electricity has
Merit trend includes 220kV electric pressure and the effective power flow data of above transmission line of electricity in province's net.
According to the electrical network EMS/SCADA real-time telemetry remote signalling amount obtained, obtain unit, main transformer, bus, the connecing in real time of circuit
Line mode, and it is calculated the state that puts into operation of electrical network unit, bus, circuit and main transformer；Judge fluctuation status and the refreshing of data
State, and network load data are carried out fluctuation status and the judgement of Flushing status the step reported to the police；
The fluctuation status of load data judged and report to the police, specifically including following steps:
A. according to the data obtained, it is judged that load type；
B. according to load type, corresponding fluctuation threshold threshold value is read；
C. the undulate quantity of calculated load data, and judge the size between the undulate quantity of load data and fluctuation threshold threshold value: if
The undulate quantity of load data is more than fluctuation threshold threshold value, then recording this load data is single load data fluctuation suspicious points,
Send single load fluctuation warning；
The undulate quantity of employing following rule calculated load data:
If load type is interconnection flow data between net, Hydropower Unit is meritorious or fired power generating unit is gained merit, then the ripple of load data
The load data value of momentum=(the load data value of load data value sampling last time of this sampling) sampling/last time；
If load type is connecting transformer effective power flow or transmission line of electricity effective power flow, then the undulate quantity of load data is this
The load data of sampling and the difference of the front load data amount once sampled；
D. to single load fluctuation suspicious points, according to the size of twice load data before and after it, it is judged that this time load fluctuation is suspicious
Point for forward fluctuation or reversely fluctuates；
E. in statistics load data, the number of times that load data fluctuates continuously, and enter with the frequency threshold value of fluctuation continuously arranged in advance
Row contrast:
If the continuously number of times of fluctuation > continuously fluctuation frequency threshold value and continuously fluctuation be forward, reversely fluctuate regularly, then judge
For low-frequency oscillation suspicious points, and report to the police；Otherwise it is judged to common load fluctuation.
The Flushing status of load data judged and report to the police, then specifically including following steps:
. according to the data obtained, it is judged that load type；
. according to load type, read corresponding data higher limit, lower limit and do not refresh threshold threshold value；
. judge that load data is whether between data higher limit and the lower limit set: if load data is beyond data
Higher limit or less than data lower limit, then assert that this load data is abnormal, and report to the police；
. if load data between data higher limit and the lower limit set, then calculates this load data and adopts with the last time
Difference between the load data of sample；
. the size judging the difference described in step with not refreshing threshold threshold value: if difference is less than not refreshing threshold threshold
Value, then assert that now load data does not refreshes, be designated as a secondary data and do not refresh suspicious points；
. the data that statistics occurs continuously do not refresh the number of suspicious points, if the data occurred continuously do not refresh suspicious points number of times
> warning threshold that sets, then preliminary judgement data within this period do not refresh；
. the most artificial remote measurement combining load data corresponding device analog value suppresses information to enter updated load data
Row real time correction, whether final this load data of judgement does not refreshes: if finally judging, this load data does not refreshes, then push automatically
Change quality of data abnormality alarming.
According to the electrical network EMS obtained and SCADA real-time telemetry remote signalling amount, following steps are used to know the topology knot of operation of power networks
Structure:
1) obtained tracking power plant, the remote signalling amount of transformer station's wire-outgoing breaker in real time by EMS/SCADA system and judge power network topology
Structure and start-up mode；
2) by EMS/SCADA system obtain grid equipment set, put board information, and with this system set, put the excellent of board information
The principle of the data that first level obtains in real time higher than system, corrects topological structure of electric, and identification obtains opening up of operation of power networks
Flutter structure.
Electrical network EMS and SCADA real-time telemetry remote signalling amount according to the operation of power networks topological structure obtained and acquisition, uses such as
Weak link in lower step identification operation of power networks and security risk grade are also reported to the police:
1. according to the topological structure of operation of power networks, obtain and be only total to the single of bar line powering by single back transmission line or many times
220kV transformer station or multiple 220kV transformer station group linked together, and described transformer station is constituted set Mi, electrical network
Middle all such transformer station constitutes set M={Mi}；Obtaining bus connection type is double-bus or 3/2 wiring, and because part is female
Line has a power failure and causes the 220kV that runs in single bus-bar operation mode and above power plant and transformer station, and by described power plant and power transformation
Composition of standing set N；
2. number b of the 220KV transformer station comprised in number a of the 220KV transformer station comprised in set M, and set N is obtained；
If a >=1 or b >=1, then judging that electrical network exists security risk, EMS system pushes the warning of Pyatyi grid event risk；
3. check the load type of all transformer stations in set M, comprise the set M of any county-level city j load for loadi, meter
Calculate transformer station set MiCounty-level city's j load of burden accounts for ratio x of county-level city's j total load, obtains transformer station set MiThe county of burden
The user of level city j accounts for total user's ratio y of county-level city j；
4. according to the accident investigation code of state's net, it is determined that whether the value of x and y is more than the threshold value specified: if x or y is more than regulation
Threshold value, then EMS system pushes the warning of level Four grid event risk；
3. and 4. 5. for all transformer stations in set N, step is repeated, the weak link in identification operation of power networks and safety
Risk class is also reported to the police.
Electrical network EMS and SCADA real-time telemetry remote signalling amount according to the operation of power networks topological structure obtained and acquisition, according to such as
Lower step judges the control nargin of operation of power networks section, and reports to the police when controlling nargin and being unsatisfactory for requiring:
A. require power plant or the power plant group unit operation number of units monitored in specifying according to the stabilization of power grids, set up set of variables Di；
B. electrical network Real-time Load amount F monitored, steady control cutting load amount Q and the definition of step a are required according to the stabilization of power grids in specifying
Power plant or power plant group unit operation number of units Di, index stabilization of power grids regulation, determine each transmission cross-section under current electric grid operation level
Stability limitation [Pi] and the unit of power plant or power plant group reserve spinning reserve amount [Xi]；
C. the size of real-time transmission cross-section Pi and the transmission cross-section stability limitation [Pi] of calculating, and power plant or power plant in real time are compared
The unit spinning reserve Xi of group and the size that spinning reserve amount [Xi] should be reserved: if transmission cross-section stability limitation is more than calculating in real time
Transmission cross-section stability limitation Pi >=[Pi], or the unit spinning reserve of in real time power plant or power plant group is less than reserving spinning reserve
Amount Xi≤[Xi], then EMS system pushes the alarm of stabilization of power grids nargin deficiency.
Claims (19)
1. network load exception and an operation risk real-time monitoring and early warning method, comprise the steps:
Obtain basic electrical network data and the service data of provincial power network, set up provincial power network and run the step of expert knowledge library；
The step of the electrical network EMS/SCADA real-time telemetry remote signalling amount under acquisition operation of power networks state in real time；
According to the electrical network EMS/SCADA real-time telemetry remote signalling amount obtained, determine putting into operation of electrical network unit, bus, circuit and main transformer
State；Judge fluctuation status and the Flushing status of data, and the data that data fluctuations exception or Refresh Data are abnormal are reported
Alert step；
According to the electrical network EMS obtained and SCADA real-time telemetry remote signalling amount, the step of the topological structure of real-time identification operation of power networks；
Electrical network EMS and SCADA real-time telemetry remote signalling amount according to the operation of power networks topological structure obtained and acquisition, identification electrical network is transported
Weak link in row and security risk grade the step reported to the police；
Electrical network EMS and SCADA real-time telemetry remote signalling amount according to the operation of power networks topological structure obtained and acquisition, it is judged that electrical network is transported
The control nargin of row section, and the step reported to the police is carried out when controlling nargin and being unsatisfactory for requiring.
Network load exception the most according to claim 1 and operation risk real-time monitoring and early warning method, it is characterised in that institute
The basic electrical network data of the provincial power network stated and service data, including circuit parallel lines on same tower information, transmission cross-section control limit,
District's power system operating mode and accident investigation code regulation.
Network load exception the most according to claim 1 and operation risk real-time monitoring and early warning method, it is characterised in that institute
The area power grid method of operation stated includes for various places/city, each 220kV station bus, the main transformer method of operation, the 110kV of county/district's electric power
Side open loop point and load prepared auto restart situation and the 110kV side grid power source method of operation.
Network load exception the most according to claim 1 and operation risk real-time monitoring and early warning method, it is characterised in that institute
State accident investigation code regulation include various places/city under Pyatyi and above power grid risk, county/district subtract for load quantity, ratio and
Other improper stoppage in transit events.
5. according to the network load exception one of claim 1 ~ 4 Suo Shu and operation risk real-time monitoring and early warning method, its feature
The electrical network EMS/SCADA real-time telemetry remote signalling amount being under described operation of power networks state, including real from each plant stand measure and control device
Time the remote measure and communication amount of primary equipment that measures and be forwarded to the data value of main website from higher level, brother regulation and control center.
Network load exception the most according to claim 5 and operation risk real-time monitoring and early warning method, it is characterised in that institute
The remote measure and communication amount stated is divided into interconnection trend between important net, Hydropower Unit to gain merit, fired power generating unit is meritorious, connecting transformer is gained merit
Trend and transmission line of electricity effective power flow.
Network load exception the most according to claim 6 and operation risk real-time monitoring and early warning method, it is characterised in that institute
Stating interconnection trend between important net is to relate to region to interconnect and exchange power disturbance two-by-two to the generation impact of whole system frequency
The trend of section.
Network load exception the most according to claim 7 and operation risk real-time monitoring and early warning method, it is characterised in that institute
State Hydropower Unit to gain merit and include accessing the meritorious data of the tracking Hydropower Unit of 220kV electric pressure and above electrical network.
Network load exception the most according to claim 8 and operation risk real-time monitoring and early warning method, it is characterised in that institute
State fired power generating unit to gain merit and include accessing the meritorious data of the tracking fired power generating unit of 220kV electric pressure and above electrical network.
Network load exception the most according to claim 9 and operation risk real-time monitoring and early warning method, it is characterised in that institute
State the three side effective power flow data including the interior 500kV electric pressure main transformer of province's net of connecting transformer effective power flow.
11. network load exceptions according to claim 10 and operation risk real-time monitoring and early warning method, it is characterised in that
Described transmission line of electricity effective power flow includes 220kV electric pressure and the effective power flow data of above transmission line of electricity in province's net.
12. network load exceptions according to claim 11 and operation risk real-time monitoring and early warning method, it is characterised in that
The state that puts into operation of described determination electrical network unit, bus, circuit and main transformer, is specially according to the electrical network EMS/SCADA obtained real
Time remote measure and communication amount, obtain unit, main transformer, bus, the real-time mode of connection of circuit, and be calculated electrical network unit, bus, line
Road and the state that puts into operation of main transformer.
13. network load exceptions according to claim 12 and operation risk real-time monitoring and early warning method, it is characterised in that
The fluctuation status of described judgement data and Flushing status, and the data that data fluctuations exception or Refresh Data are abnormal are reported
Alert, it is specially and carries out fluctuation status and the judgement of Flushing status for network load data and report to the police.
14. network load exceptions according to claim 13 and operation risk real-time monitoring and early warning method, it is characterised in that
The described fluctuation status to load data judges and reports to the police, and specifically includes following steps:
A. according to the data obtained, it is judged that load type；
B. according to load type, corresponding fluctuation threshold threshold value is read；
C. the undulate quantity of calculated load data, and judge the size between the undulate quantity of load data and fluctuation threshold threshold value: if
The undulate quantity of load data is more than fluctuation threshold threshold value, then recording this load data is single load data fluctuation suspicious points,
Send single load fluctuation warning；
D. to single load fluctuation suspicious points, according to the size of twice load data before and after it, it is judged that this time load fluctuation is suspicious
Point for forward fluctuation or reversely fluctuates；
E. in statistics load data, the number of times that load data fluctuates continuously, and enter with the frequency threshold value of fluctuation continuously arranged in advance
Row contrast:
If the continuously number of times of fluctuation > continuously fluctuation frequency threshold value and continuously fluctuation be forward, reversely fluctuate regularly, then judge
For low-frequency oscillation suspicious points, and report to the police；Otherwise it is judged to common load fluctuation.
15. network load exceptions according to claim 14 and operation risk real-time monitoring and early warning method, it is characterised in that
The undulate quantity of described load data, specially uses following rule to calculate:
If load type is interconnection flow data between net, Hydropower Unit is meritorious or fired power generating unit is gained merit, then the ripple of load data
The load data value of momentum=(the load data value of load data value sampling last time of this sampling) sampling/last time；
If load type is connecting transformer effective power flow or transmission line of electricity effective power flow, then the undulate quantity of load data is this
The load data of sampling and the difference of the front load data amount once sampled.
16. network load exceptions according to claim 13 and operation risk real-time monitoring and early warning method, it is characterised in that
The described Flushing status to load data judges and reports to the police, and specifically includes following steps:
. according to the data obtained, it is judged that load type；
. according to load type, read corresponding data higher limit, lower limit and do not refresh threshold threshold value；
. judge that load data is whether between data higher limit and the lower limit set: if load data is beyond data
Higher limit or less than data lower limit, then assert that this load data is abnormal, and report to the police；
. if load data between data higher limit and the lower limit set, then calculates this load data and adopts with the last time
Difference between the load data of sample；
. the size judging the difference described in step with not refreshing threshold threshold value: if difference is less than not refreshing threshold threshold
Value, then assert that now load data does not refreshes, be designated as a secondary data and do not refresh suspicious points；
. the data that statistics occurs continuously do not refresh the number of suspicious points, if the data occurred continuously do not refresh suspicious points number of times
> warning threshold that sets, then preliminary judgement data within this period do not refresh；
. the most artificial remote measurement combining load data corresponding device analog value suppresses information to enter updated load data
Row real time correction, whether final this load data of judgement does not refreshes: if finally judging, this load data does not refreshes, then push automatically
Change quality of data abnormality alarming.
17. network load exceptions according to claim 13 and operation risk real-time monitoring and early warning method, it is characterised in that
The topological structure of described identification operation of power networks, specifically includes following steps:
1) obtained tracking power plant, the remote signalling amount of transformer station's wire-outgoing breaker in real time by EMS/SCADA system and judge power network topology
Structure and start-up mode；
2) by EMS/SCADA system obtain grid equipment set, put board information, and with this system set, put the excellent of board information
The principle of the data that first level obtains in real time higher than system, corrects topological structure of electric, and identification obtains opening up of operation of power networks
Flutter structure.
18. network load exceptions according to claim 13 and operation risk real-time monitoring and early warning method, it is characterised in that
The described weak link in identification operation of power networks and security risk grade are also reported to the police, and specifically include following steps:
1. according to the topological structure of operation of power networks, obtain and be only total to the single of bar line powering by single back transmission line or many times
220kV transformer station or multiple 220kV transformer station group linked together, and described transformer station is constituted set Mi, electrical network
Middle all such transformer station constitutes set M={Mi}；Obtaining bus connection type is double-bus or 3/2 wiring, and because part is female
Line has a power failure and causes the 220kV that runs in single bus-bar operation mode and above power plant and transformer station, and by described power plant and power transformation
Composition of standing set N；
2. number b of the 220KV transformer station comprised in number a of the 220KV transformer station comprised in set M, and set N is obtained；
If a >=1 or b >=1, then judging that electrical network exists security risk, EMS system pushes the warning of Pyatyi grid event risk；
3. check the load type of all transformer stations in set M, comprise the set M of any county-level city j load for loadi, calculate
Transformer station set MiCounty-level city's j load of burden accounts for ratio x of county-level city's j total load, obtains transformer station set MiThat bears is at county level
The user of city j accounts for total user's ratio y of county-level city j；
4. according to the accident investigation code of state's net, it is determined that whether the value of x and y is more than the threshold value specified: if x or y is more than regulation
Threshold value, then EMS system pushes the warning of level Four grid event risk；
3. and 4. 5. for all transformer stations in set N, step is repeated, the weak link in identification operation of power networks and safety
Risk class is also reported to the police.
19. network load exceptions according to claim 13 and operation risk real-time monitoring and early warning method, it is characterised in that
The described control nargin judging operation of power networks section is also reported to the police, and specifically includes following steps:
A. require power plant or the power plant group unit operation number of units monitored in specifying according to the stabilization of power grids, set up set of variables；
B. the electrical network Real-time Load amount monitored, steady control cutting load amount and the electricity of step a definition are required according to the stabilization of power grids in specifying
Factory or power plant group unit operation number of units, determine stablizing of each transmission cross-section under current electric grid operation level according to stabilization of power grids regulation
The unit of limit and power plant or power plant group reserves spinning reserve amount；
C. the size of real-time transmission cross-section and the transmission cross-section stability limitation of calculating, and power plant or the machine of power plant group in real time are compared
Group spinning reserve and the size that spinning reserve amount should be reserved: if transmission cross-section stability limitation is more than or equal to the transmission of electricity calculated in real time
Section stability limitation, or the unit spinning reserve amount of real-time power plant or power plant group is less than reserving spinning reserve amount, then EMS system
Push the alarm of stabilization of power grids nargin deficiency.
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