CN105186495B - THE UPFC optimization of operation strategy method based on powernet data - Google Patents
THE UPFC optimization of operation strategy method based on powernet data Download PDFInfo
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- 238000004422 calculation algorithm Methods 0.000 claims abstract description 10
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Abstract
The invention discloses the present invention relates to a kind of THE UPFC optimization of operation strategy method based on powernet data, according to the real time execution situation of power network, the continuous control targe and constraints for updating UPFC, the computation model of optimal load flow is set up according to UPFC control targe and constraints, UPFC control strategy is obtained after being solved using optimized algorithm.This method can be used for the real time execution of power network to control, and makes full use of the characteristics of UPFC control abilities are strong, improves the utilization rate of device, it is ensured that power network safety operation.The present invention sets up UPFC optimization of operation strategy model and solved according to the practical operation situation of power network, rolls the optimal operation mode for formulating UPFC, to make full use of the abilities such as the powerful voltage supports of UPFC, Line Flow control to create condition.
Description
Technical field
The present invention relates to a kind of power system computation method, more particularly to a kind of Unified Power Flow based on powernet data
Controller optimization of operation strategy method, belongs to electric power system dispatching operation field.
Background technology
The safe and economical operation of modern power systems is faced with new challenge, and operation of power networks needs new regulation and control hand
Section, the need for meeting power system security stable operation, wherein how to carry out effective regulation and control to the trend of power network
It is one of current subject matter for being badly in need of solving.
For a long time, people are many for the research of the Optimal Power Flow control of power system.But power electronics skill
The development of art generates tremendous influence to traditional power system with application in the control to Optimal Power Flow.Traditional power network
Control is more to carry out mechanical control so as to cause slow control, interruption and inaccurate situation using control panel, and FACTS
(flexible AC transmitting system (FACTS)：Flexible Alternative Current Transmission Systems) skill
This situation has successfully been reversed in the utilization of art, realizes smooth to system mode, rapid and real-time regulation.This regulative mode
The limitation of conventional conveying electric energy safe nargin can be broken through, to distribution network while the system of raising conveying electric energy ability
Trend power realizes optimal control, and the safe and stable operation of whole system can be made more secure.On the other hand, high-power electricity
Developing rapidly for power electronic technology, also continues to that application of the FACTS devices in power system can be promoted, in power system from now on
Also control and influence of the FACST devices on system must be considered in actual motion.Because Optimal Power Flow control is FACTS applications
In one of mostly important aspect, so research it is a set of reliable, effective and it is advanced can meter and FACST devices Optimal Power Flow control
Method processed is just particularly important.
Therefore, electric power networks Optimal Power Flow control of the research containing FACTS controllers has important theory value and reality
Border meaning, and be critical and urgent.Wherein THE UPFC is as most representative in FACTS controllers and most
A kind of complicated compensator, it can provide for transmission line of electricity and connect and shunt compensation simultaneously, be also that versatility is most so far
Good FACTS devices.Thus research UPFC runs the optimal method of control strategy, is run for improving UPFC in power network
Flexibility and reliability have positive meaning.
THE UPFC also should so far as the most strong FACTS devices of the most advanced, control ability now
In the actual electric network of China.THE UPFC can't be applied effectively with power network, lacking THE UPFC
Safe and stable operation in actual electric network ensures, it is impossible to play the control abilities such as trend, the voltage of THE UPFC.
The content of the invention
The purpose of the present invention is to propose to a kind of THE UPFC optimization of operation strategy side based on powernet data
Method, according to the running situation of actual electric network, selects UPFC control targe, while determining corresponding constraints；According to UPFC
Control targe and constraints set up the computation model of optimal load flow, UPFC control is obtained after being solved using optimized algorithm
System strategy.This method can be used for the real time execution of power network to control, and makes full use of the characteristics of UPFC control abilities are strong, improves device
Utilization rate, it is ensured that power network safety operation.
To achieve the above objectives, the present invention is realized using following technical scheme.
The technical solution adopted by the present invention is：
THE UPFC optimization of operation strategy method based on powernet data, comprises the following steps：
(1) grid simulation after state estimation is obtained based on power network Real-Time Scheduling runtime and calculates data；
(2) data are calculated according to the grid simulation to classify to operation of power networks state；
(3) different type according to the operation of power networks state, the control targe of selection THE UPFC (UPFC)；
(4) according to the difference of THE UPFC (UPFC) control targe, selection basic constraint condition and dynamic constrained
Condition；
(5) data and operation of power networks state are calculated based on grid simulation, selected by UPFC control targes and constraints
Algorithm, determines that THE UPFC UPFC control targe and constraints set up optimal load flow model, and use number respectively
Learn the optimized operation strategy that UPFC is obtained after Optimization Method.
More preferably, the operation of power networks state classification described in step (2) is divided according to the problem of presence according to operation of power networks
Class, according to the order of severity of problem from weighing to gently operation of power networks state is in turn divided into：Circuit overload, circuit N-1 overloads, section
Point voltage out-of-limit and normal operating condition.
More preferably, the control targe of the THE UPFC (UPFC) described in step (3) includes：Elimination circuit overload,
Eliminate circuit N-1 overloads, elimination node voltage is out-of-limit and grid net loss is minimum.
More preferably, the basic constraint condition described in step (4) is the constraints that must take into consideration, and dynamic constrained condition is root
The constraints being determined according to the control targe of THE UPFC (UPFC).The basic constraint condition includes unified tide
Stream controller (UPFC) series side is active and the bound of reactive power, and THE UPFC (UPFC) parallel connection side is active and nothing
The bound of work(power, power plant are active and idle exert oneself constrains up and down；The dynamic constrained condition is included above and below node voltage
Limit, circuit active power bound, circuit N-1 constraint.
More preferably, step (5) specifically includes following steps：
step0:Simulation calculation is carried out to operation of power networks data；
step1:Judge that power network overloads with the presence or absence of Line Flow, overloaded if there is Line Flow, turn step2, otherwise,
Turn step3；
step2:UPFC control targes turn step8 to eliminate constraints based on circuit overload, constraints；
step3:Judge that power network overloads with the presence or absence of circuit N-1, overloaded if there is circuit N-1, turn step4, otherwise, turn
step5；
step4:UPFC control targes is eliminate circuit N-1 overloads, and constraints is in addition to basic constraint condition, including circuit
Active power bound is constrained, and turns step8；
step5:Judge that power network is out-of-limit with the presence or absence of node voltage, it is out-of-limit if there is node voltage, turn step6, otherwise,
Turn step7；
step6:UPFC control targes for eliminate node voltage it is out-of-limit, constraints in addition to basic constraint condition, in addition to
Circuit active power bound is constrained and circuit N-1 overload constraints, turns step8；
step7:UPFC control targes are that grid net loss is minimum, and constraints is in addition to basic constraint condition, in addition to circuit
The constraint of active power bound, circuit N-1 overload constraints and the constraint of node voltage bound, turn step8；
step8:Optimal load flow computation model is set up according to UPFC control targes and constraints, solved using optimized algorithm
Afterwards, UPFC optimal control policy is exported.
UPFC control targes and constraints selection algorithm i.e. described in step (5) specifically include step step0~
step7。
Compared with prior art, beneficial effect of the present invention includes：
The present invention proposes a kind of THE UPFC optimization of operation strategy method based on operation of power networks data, according to reality
The running situation of border power network, selects UPFC control targe, while determining corresponding constraints；According to UPFC control targe
The computation model of optimal load flow is set up with constraints, UPFC control strategy is obtained after being solved using optimized algorithm.This
Method can be used for the real time execution of power network to control, and makes full use of the characteristics of UPFC control abilities are strong, improves the utilization rate of device,
Power network safety operation is ensure that, it is ensured that the continuous reliability of operation of power network, while making full use of the powerful control energy of UPFC
Power and flexible regulating power；
The present invention considers in power network actual motion that Line Flow, node voltage constantly change, it is ensured that power network is pacified
The primary control targe of full stable operation is also corresponding different, and the present invention makes full use of UPFC strong according to power network practical operation situation
The control targe of big Line Flow control ability and voltage regulation capability, in real time adjustment UPFC, it is ensured that power network is continuously in optimal
Running status, with good economy；
The present invention ensures safe and stable operation of the THE UPFC in actual electric network, and farthest plays system
The control abilities such as trend, the voltage of one flow controller, be future the practical engineering application of THE UPFC create conditions.
Brief description of the drawings
Fig. 1 is the THE UPFC optimization of operation strategy method flow of the present invention based on operation of power networks data
Figure.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of THE UPFC optimization of operation strategy method based on powernet data, including with
Lower step：
(1) grid simulation after state estimation is obtained based on power network Real-Time Scheduling runtime and calculates data；
(2) calculate data according to the grid simulation to classify to operation of power networks state, operation of power networks state classification root
According to according to operation of power networks exist the problem of classified, according to problem the order of severity from weigh to gently by operation of power networks state successively
It is divided into：Circuit overload, circuit N-1 overload, node voltage is out-of-limit and normal operating condition；
(3) different type according to the operation of power networks state, the control targe of selection THE UPFC (UPFC),
The control targe of the THE UPFC (UPFC) includes：Circuit overload is eliminated, circuit N-1 overloads is eliminated, eliminates node
Voltage out-of-limit and grid net loss are minimum；
(4) according to the difference of THE UPFC (UPFC) control targe, selection basic constraint condition and dynamic constrained
Condition；Basic constraint condition is the constraints that must take into consideration, and dynamic constrained condition is according to THE UPFC (UPFC)
The constraints that is determined of control targe.Basic constraint condition include THE UPFC (UPFC) series side it is active and
The bound of reactive power, active and reactive power the bound in THE UPFC (UPFC) parallel connection side, power plant are active
Constrained up and down with idle exert oneself；The dynamic constrained condition includes node voltage bound, circuit active power bound, circuit
N-1 is constrained；
(5) data and operation of power networks state are calculated based on grid simulation, selected by UPFC control targes and constraints
Algorithm, determines that THE UPFC UPFC control targe and constraints set up optimal load flow model, and use number respectively
Learn the optimized operation strategy that UPFC is obtained after Optimization Method；
Step (5) specifically includes following steps：
step0:Simulation calculation is carried out to operation of power networks data；
step1:Judge that power network overloads with the presence or absence of Line Flow, overloaded if there is Line Flow, turn step2, otherwise,
Turn step3；
step2:UPFC control targes turn step8 to eliminate constraints based on circuit overload, constraints；
step3:Judge that power network overloads with the presence or absence of circuit N-1, overloaded if there is circuit N-1, turn step4, otherwise, turn
step5；
step4:UPFC control targes is eliminate circuit N-1 overloads, and constraints is in addition to basic constraint condition, including circuit
Active power bound is constrained, and turns step8；
step5:Judge that power network is out-of-limit with the presence or absence of node voltage, it is out-of-limit if there is node voltage, turn step6, otherwise,
Turn step7；
step6:UPFC control targes for eliminate node voltage it is out-of-limit, constraints in addition to basic constraint condition, in addition to
Circuit active power bound is constrained and circuit N-1 overload constraints, turns step8；
step7:UPFC control targes are that grid net loss is minimum, and constraints is in addition to basic constraint condition, in addition to circuit
The constraint of active power bound, circuit N-1 overload constraints and the constraint of node voltage bound, turn step8；
step8:Optimal load flow computation model is set up according to UPFC control targes and constraints, solved using optimized algorithm
Afterwards, UPFC optimal control policy is exported.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (4)
1. the THE UPFC optimization of operation strategy method based on powernet data, it is characterised in that including following step
Suddenly：
(1) grid simulation after state estimation is obtained based on power network Real-Time Scheduling runtime and calculates data；
(2) data are calculated according to the grid simulation to classify to operation of power networks state；
(3) different type according to the operation of power networks state, selects the control targe of THE UPFC；
(4) according to the difference of THE UPFC control targe, selection basic constraint condition and dynamic constrained condition；
(5) data and operation of power networks state, control targe and constraint by THE UPFC are calculated based on grid simulation
Condition selection algorithm, determines that the control targe and constraints of THE UPFC set up optimal load flow model, and adopt respectively
The optimized operation strategy of THE UPFC is obtained after being solved with Mathematics Optimization Method；
The step (5) specifically includes following steps：
step0:Simulation calculation is carried out to operation of power networks data；
step1:Judge that power network overloads with the presence or absence of Line Flow, overloaded if there is Line Flow, turn step 2, otherwise, turn
step3；
step2:The control targe of THE UPFC turns to eliminate constraints based on circuit overload, constraints
step8；
step3:Judge that power network overloads with the presence or absence of circuit N-1, overloaded if there is circuit N-1, turn step 4, otherwise, turn
step5；
step4:The control targe of THE UPFC to eliminate circuit N-1 overload, constraints in addition to basic constraint condition,
Including the constraint of circuit active power bound, turn step8；
step5:Judge that power network is out-of-limit with the presence or absence of node voltage, it is out-of-limit if there is node voltage, turn step 6, otherwise, turn
step7；
step6:The control targe of THE UPFC is out-of-limit to eliminate node voltage, and constraints removes basic constraint condition
Outside, in addition to circuit active power bound constraint and circuit N-1 overload constraints, turn step8；
step7:The control targe of THE UPFC is that grid net loss is minimum, and constraints is in addition to basic constraint condition, also
Including the constraint of circuit active power bound, circuit N-1 overload constraints and the constraint of node voltage bound, turn step8；
step8:Optimal load flow computation model is set up according to the control targe and constraints of THE UPFC, using excellent
Change after Algorithm for Solving, export the optimal control policy of THE UPFC.
2. the THE UPFC optimization of operation strategy method according to claim 1 based on powernet data, its
It is characterised by, the operation of power networks state classification described in step (2) is classified according to the problem of presence according to operation of power networks, according to
The order of severity of problem is from weighing to gently operation of power networks state is in turn divided into：Circuit overload, circuit N-1 overloads, node voltage
Out-of-limit and normal operating condition.
3. the THE UPFC optimization of operation strategy method according to claim 1 based on powernet data, its
It is characterised by, the control targe of the THE UPFC described in step (3) includes：Eliminate circuit overload, eliminate circuit N-1 mistakes
Carry, elimination node voltage is out-of-limit and grid net loss is minimum.
4. the THE UPFC optimization of operation strategy method according to claim 1 based on powernet data, its
It is characterised by, the basic constraint condition described in step (4) is the constraints that must take into consideration, dynamic constrained condition is according to unified
The constraints that the control targe of flow controller is determined；
The basic constraint condition includes active and reactive power the bound of THE UPFC series side, Unified Power Flow control
Active and reactive power the bound in device processed side in parallel, power plant are active and idle exert oneself constrains up and down；The dynamic constrained bar
Part includes node voltage bound, circuit active power bound, circuit N-1 constraints.
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| CN106208083B (en) * | 2016-10-09 | 2018-09-07 | 国网河北省电力公司 | A kind of method and device obtaining THE UPFC configuration |
| CN111262856B (en) * | 2020-01-15 | 2022-03-01 | 国网陕西省电力公司电力科学研究院 | Mobile target defense response method guided by economic and safety requirements |
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| CN103001219A (en) * | 2012-11-30 | 2013-03-27 | 湖南大学 | Optimal coordination control method of multiple flexible alternative current transmission systems (FACTSs) based on trend entropy |
| CN103138255A (en) * | 2011-11-25 | 2013-06-05 | 沈阳工业大学 | Decomposition calculating method of optimal power flow of power system with unified power flow controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138255A (en) * | 2011-11-25 | 2013-06-05 | 沈阳工业大学 | Decomposition calculating method of optimal power flow of power system with unified power flow controller |
| CN103001219A (en) * | 2012-11-30 | 2013-03-27 | 湖南大学 | Optimal coordination control method of multiple flexible alternative current transmission systems (FACTSs) based on trend entropy |
Non-Patent Citations (1)
| Title |
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| 基于本地可测量参数的UPFC暂态能量控制;董雷 等;《电网技术》;20030228;第27卷(第2期);50-53 * |
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