CN106208093A - Power station reactor collocation method and system - Google Patents
Power station reactor collocation method and system Download PDFInfo
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- CN106208093A CN106208093A CN201610836892.8A CN201610836892A CN106208093A CN 106208093 A CN106208093 A CN 106208093A CN 201610836892 A CN201610836892 A CN 201610836892A CN 106208093 A CN106208093 A CN 106208093A
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
nullThe present invention relates to a kind of power station reactor collocation method and system,Including the input parameter obtaining power station reactor collocation method,Input parameter according to collocation method calculates power station the input impedance of dot location,The unit that the input impedance of input parameter according to collocation method and power station dot location calculates when reactor is not installed in power station enters phase pressure regulation cost,Input parameter and the input impedance of power station dot location according to collocation method set up power station reactor configuration mathematic optimal model,Mathematic optimal model is solved the capacity optimal solution of the target function value after being optimized and reactor,Judge that unit enters whether phase pressure regulation cost is more than or equal to the size of the target function value after optimizing,If,Then export the information of the reactor that installed capacity is capacity optimal solution,Foundation is provided for power station reasonable disposition reactor,Thus improve power station Reactive-power control ability,Electrical network is made to be able to safety and economic operation.
Description
Technical field
The present invention relates to electric power network field, particularly relate to a kind of power station reactor collocation method and system.
Background technology
In recent years, under the background of Devoting Major Efforts To Developing small power station, increasing power station has been accessed in power distribution network, fully
While utilizing water resource, also bring the voltage power-less problem of power distribution network.
Traditional method improving the quality of voltage level that distribution line is accessed in power station mainly has excavation small power station unit
The modes such as under-excitation ability and configuration shunt reactor.But the leading phase operation of small power station's unit, on the one hand can reduce electromotor has
The output of merit electricity, on the other hand can affect the stability of unit operation, be uneconomic method of operation;And present situation Power Station
The configuration of anti-device is typically based on experienced judgement, lacks guideline, it is impossible to adapt to power station reactance under different service condition
The needs that device is distributed rationally, easily cause reactor configuration not enough or superfluous, and reactor install generally with the building of power station
If the same period is carried out, run duration is generally not capable of changing, and therefore, if reactor configuration deficiency, then affects reactive voltage ability of regulation and control;
If configuration surplus, then increase unnecessary economic input and operation and maintenance cost, affect income.Traditional improvement power station is accessed
The method of the quality of voltage level of distribution line cannot reasonable disposition power station reactor.
Summary of the invention
Based on this, it is necessary to for the problems referred to above, it is provided that the power station reactor configuration of a kind of energy reasonable disposition reactor
Method and system.
A kind of power station reactor collocation method, it is characterised in that comprise the following steps:
Obtain the input parameter of power station reactor collocation method;
Input parameter according to described collocation method calculates power station the input impedance of dot location;
Input parameter and the input impedance of described power station dot location according to described collocation method calculate power station
Unit when not installing reactor enters phase pressure regulation cost;
The input input parameter of method for parameter configuration according to described collocation method and described power station dot location
Input impedance sets up power station reactor configuration mathematic optimal model, solves described mathematic optimal model after being optimized
Target function value and the capacity optimal solution of reactor;
Judge that described unit enters phase pressure regulation cost whether more than or equal to the size of the target function value after described optimization;
The most then export the information of the reactor that installed capacity is described capacity optimal solution.
A kind of power station reactor configuration system, it is characterised in that including:
Acquisition module, obtains the input parameter of power station reactor collocation method;
Input impedance computing module, calculates power station the input of dot location according to the input parameter of described collocation method
Impedance;
Unit enters phase pressure regulation cost computing module, according to the input parameter of described collocation method and described power station site
The unit that the input impedance of position calculates when reactor is not installed in power station enters phase pressure regulation cost;
Optimized model is set up and is solved module, according to the input parameter of described collocation method and described power station dot location
Input impedance set up power station reactor configuration mathematic optimal model, described mathematic optimal model is solved and is optimized
After target function value and the capacity optimal solution of reactor;
Judge module, it is judged that whether described unit enters phase pressure regulation cost more than or equal to the target function value after described optimization
Size;
Information output module, the most then export the prompting letter of the reactor that installed capacity is described capacity optimal solution
Breath.
Above-mentioned power station reactor collocation method and system, join by obtaining the input of power station reactor collocation method
Number, calculates the input impedance of grid-connected position, power station, and defeated according to the grid-connected position of input parameter and power station of collocation method
Enter unit when reactor is not installed in impedance computation power station and enter phase pressure regulation cost and to set up power station reactor configuration mathematics excellent
Change model, mathematic optimal model solved the capacity optimal solution of the target function value after being optimized and reactor, it is judged that
Unit enters whether phase pressure regulation cost is more than or equal to the size of the target function value after optimizing, the most then output installed capacity is
The information of the reactor of capacity optimal solution, provides foundation for power station reasonable disposition reactor, thus improves power station
Reactive-power control ability, makes electrical network be able to safety and economic operation.
Accompanying drawing explanation
Fig. 1 is the flow chart of power station reactor collocation method in an embodiment;
Fig. 2 is the structure chart of power station reactor configuration system in an embodiment;
Fig. 3 is the topological structure of electrical network in an embodiment.
Detailed description of the invention
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.In accompanying drawing
Give the preferred embodiment of the present invention.But, the present invention can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, providing the purpose of these embodiments is to make the understanding to the disclosure more saturating
Thorough comprehensively.
Unless otherwise defined, all of technology used herein and scientific terminology and the technical field belonging to the present invention
The implication that technical staff is generally understood that is identical.The term used the most in the description of the invention is intended merely to describe tool
The purpose of the embodiment of body, it is not intended that in limiting the present invention.Term as used herein " or/and " include one or more phase
Arbitrary and all of combination of the Listed Items closed.
In one embodiment, as it is shown in figure 1, a kind of power station reactor collocation method, comprise the following steps:
Step S110: obtain the input parameter of power station reactor collocation method.
The concrete kind of the input parameter of collocation method is not unique, and the input parameter of collocation method specifically can include electrical network
The connected mode of circuit, line resistance, line reactance, power station dot location, power station capacity SW, hydropower net pricing CW、
System power supply position, the natural law T of wet season upper one yearW, reactor mounting cost CX1, reactor year maintenance expense CX2, reactor list
Valency CX3Life-span T with reactorXAt least one.The connected mode of power network line is the most unique.
Step S120: calculate the input impedance of grid-connected position, power station according to the input parameter of collocation method.Specifically, exist
In one embodiment, step S120 includes step 122 and step 124.
Step 122: when in the electrical network that power station is accessed other all nodes in addition to system power supply position be set to open circuit,
System power supply is set to short circuit, and when power station dot location are plus voltage source, measures power station the electricity of dot location
Pressure and electric current.
Step 124: obtain resistance and the reactance of input impedance according to voltage and electric current.
Specifically, the difference of the connected mode of power network line, influence whether the input impedance of the grid-connected position of small power station.Defeated
Entering impedance in the definition above circuit is: possibly together with controlled source in addition to impedance inside circuit, but without any independent current source, then
Port voltage is directly proportional to port current, and this ratio is defined as the input impedance of this circuit, i.e. the equivalence resistance of circuit input end
Anti-.Calculate the input impedance of the grid-connected position of small hydropower station, can be the passive of a Single port by small hydropower station place circuit equivalent
Network, then the input impedance calculation of the grid-connected position of small hydropower station is: system power supply is set to short circuit, all small hydropower stations with
And load bus is set to open circuit, the in addition voltage source in the grid-connected position of calculated small hydropower station, then obtain the electric current of this position, electric
The ratio of pressure and electric current i.e. can get input impedance.
Step S130: calculate power station not according to the input impedance of the grid-connected position of input parameter and power station of collocation method
Unit when installing reactor enters phase pressure regulation cost, particularly as follows:
Wherein, TXLife-span, T for reactorWNatural law, C for the wet season upper one yearWFor hydropower net pricing, RWFor input
The resistance of impedance, XWReactance, S for input impedanceWFor power station capacity.
Specifically, " unit when reactor is not installed in power station enters phase pressure regulation cost " refers to that power station is uneasy in the wet season
Dress reactor, the active power entering to make mutually the grid-connected point voltage in power station not sent by small power station merely with unit is affected, so that
The loss that the active energy of output is caused is reduced in power station.Leading phase operation refers to reduce exciter current of generator, makes electromotor
Electromotive force reduces, and power-factor angle just becomes advanced, and generator load electric current produces magnetic assist armature-reaction, and electromotor is defeated to system
Send active power, but absorbing reactive power, this running status is referred to as leading phase operation.
Step S140: set up power station according to the input parameter of collocation method and the input impedance of power station dot location
Reactor configuration mathematic optimal model, solves the target function value after being optimized and reactor to mathematic optimal model
Capacity optimal solution:
Wherein, CXFor target function value, QXFor reactor capacity, CWFor hydropower net pricing, TXLife-span, T for reactorW
Natural law, S for the wet season upper one yearWFor power station capacity, RWResistance, X for input impedanceWReactance, C for input impedanceX1For
Reactor mounting cost, CX2For reactor maintenance expense, CX3For reactor unit price.
Specifically, using simulated annealing to solve above-mentioned mathematic optimal model, simulated annealing is a kind of logical
Use probability calculus method, be used for looking for the optimal solution of proposition in a big search space, be a kind of conventional solving-optimizing mould
The intelligent optimization algorithm of type optimal solution.
Above-mentioned mathematic optimal model refers to comprise Hydropower Plant and enters phase pressure regulation cost and install the total of reactor cost
Cost is object function, the mathematic optimal model with reactor installed capacity as control variable, the derivation that object function is concrete
Journey is as follows:
If the active power making the voltage of power station dot location not sent by water power is affected, then have:
I.e. PRW-QXW=0
The active-power P that sends for Hydropower Unit leading phase operation, reactive power QΔ, small power station capacity SW, reactor sends out
The reactive power Q gone outX, small hydropower station the input impedance R of dot locationW+j XW, obtain:
P again2+QΔ 2=SW 2, abbreviation can obtain:
When Hydropower Plant is not required to send to system or during absorbing reactive power, and Hydropower Plant now can completely be sent out meritorious
Power, i.e. has P=SW, and Hydropower Plant causes the active power reducing output to be Δ P=S because of leading phase operationW-P, knot
Box-like (1) has:
When power station does not configures reactor, i.e. QX=0, formula (2) can turn to:
Object function minCX(QX) be made up of four parts, be respectively as follows: unit enter phase pressure regulation cost, reactor mounting cost,
Reactor arrangement expense and reactor maintenance cost, arranging available object function is:
Step S150: judge that unit enters whether phase pressure regulation cost is more than or equal to the size of the target function value after optimizing.
Step S160: the most then export the information of the reactor that installed capacity is capacity optimal solution.
Specifically, when unit enters the size that phase pressure regulation cost is less than the target function value after optimizing, electricity is not installed in output
The information of anti-device.
Above-mentioned power station reactor collocation method, by obtaining the input parameter of power station reactor collocation method, calculates
The input impedance of grid-connected position, power station, and the input impedance meter of the grid-connected position of input parameter and power station according to collocation method
Calculate unit when reactor is not installed in power station enter phase pressure regulation cost and set up power station reactor configuration mathematic optimal model, right
Mathematic optimal model carries out solving the capacity optimal solution of the target function value after being optimized and reactor, it is judged that unit enters to be adjusted mutually
Whether pressure cost is more than or equal to the size of the target function value after optimizing, the most then output installed capacity is capacity optimal solution
The information of reactor, provide foundation for power station reasonable disposition reactor, thus improve power station Reactive-power control energy
Power, makes electrical network be able to safety and economic operation.
In one embodiment, as in figure 2 it is shown, a kind of power station reactor configuration system, including acquisition module 110, defeated
Enter impedance computation module 120, unit enters phase pressure regulation cost computing module 130, Optimized model foundation solves module 140, judges mould
Block 150 and information output module 160.
Acquisition module 110, obtains the input parameter of power station reactor collocation method.Specifically, acquisition module 110 is used for
Obtain the connected mode of power network line, line resistance, line reactance, power station dot location, power station capacity, Hydropower Entering In Power Network
Electricity price, system power supply position, the natural law of wet season upper one year, reactor mounting cost, reactor year maintenance expense, reactor unit price
With at least one in the reactor life-span.
Input impedance computing module 120, calculates power station the input of dot location according to the input parameter of collocation method
Impedance.Specifically, input impedance computing module 120 includes arranging measuring unit and computing unit.
Measuring unit is set, when in the electrical network that power station is accessed, other all nodes in addition to system power supply position are set to
Open circuit, system power supply are set to short circuit, and when power station dot location are plus voltage source, measure power station dot location
Voltage and current.
Computing unit, obtains resistance and the reactance of input impedance according to voltage and electric current.
Unit enters phase pressure regulation cost computing module 130, according to the input parameter of collocation method and power station dot location
Input impedance calculate power station unit when not installing reactor and enter phase pressure regulation cost.Wherein in an embodiment, specifically
For:
Wherein, TXLife-span, T for reactorWNatural law, C for the wet season upper one yearWFor hydropower net pricing, RWFor input
The resistance of impedance, XWReactance, S for input impedanceWFor power station capacity.
Optimized model is set up and is solved module 140, defeated according to the input parameter of collocation method and power station dot location
Enter impedance and set up power station reactor configuration mathematic optimal model, mathematic optimal model is solved the target after being optimized
The capacity optimal solution of functional value and reactor.Wherein in an embodiment, particularly as follows:
Wherein, CXFor target function value, QXFor reactor capacity, CWFor hydropower net pricing, TXLife-span, T for reactorW
Natural law, S for the wet season upper one yearWFor power station capacity, RWResistance, X for input impedanceWReactance, C for input impedanceX1For
Reactor mounting cost, CX2For reactor maintenance expense, CX3For reactor unit price.
Judge module 150, it is judged that unit enters whether phase pressure regulation cost is more than or equal to the big of the target function value after optimizing
Little.
Information output module 160, the most then export the prompting letter of the reactor that installed capacity is capacity optimal solution
Breath.
Specifically, if unit enters the phase pressure regulation cost size less than the target function value after optimizing, then export and electricity is not installed
The information of anti-device.
Above-mentioned power station reactor configuration system, obtains the defeated of power station reactor collocation method by acquisition module 110
Entering parameter, input impedance computing module 120 calculates the input impedance of grid-connected position, power station, and unit enters phase pressure regulation cost and calculates mould
When block 130 does not installs reactor according to the input impedance calculating power station of the grid-connected position of input parameter and power station of collocation method
Unit enter phase pressure regulation cost, Optimized model is set up and is solved module 140 and set up power station reactor configuration mathematic optimal model, right
Mathematic optimal model carries out solving the capacity optimal solution of the target function value after being optimized and reactor, it is judged that module 150 is used
In judging that unit enters whether phase pressure regulation cost is more than or equal to the size of the target function value after optimizing, if so, information is defeated
Go out module 160 and export the information of the reactor that installed capacity is capacity optimal solution, carry for power station reasonable disposition reactor
Supply foundation, thus improved power station Reactive-power control ability, made electrical network be able to safety and economic operation.
In one embodiment, as it is shown on figure 3, carry out emulation as a example by certain 10kV power distribution network accessed containing power station and count
Calculate.
Power station S is directly connected in a certain radioactivity 10kV power distribution network, and specifically, power station S is linked into this power distribution network
At the 2/3 of circuit trunk, obtain line resistance rLWith line reactance xL, small hydropower station dot location, small hydropower station capacity SW、
Small power supply electricity price CW, system power supply position, the natural law T of wet season upper one yearW, reactor mounting cost CX1, reactor year
Maintenance expense CX2, reactor unit price CX3Life-span T with reactorX, have: rL=1.737 Ω, xL=2.9175 Ω, SW=4000kW,
CW=0.4 yuan/kW h, TW=100, CX1=10000 yuan, CX2=8000 yuan, CX3=50 yuan/kVar, TX=10 years.
Disconnect other all nodes in addition to system power supply B location in Fig. 3, obtain the input resistance of the grid-connected position from power station
Resist for 1.158+j1.945 Ω.
Unit when not installing reactor according to above-mentioned parameter and calculating power station enters phase pressure regulation cost formula, calculates C0
=2702600 yuan.
According to above-mentioned parameter and set up power station reactor configuration mathematic optimal model, with QXFor independent variable, use mould
Plan annealing algorithm solves the target function value after being optimized to above-mentioned power station reactor configuration mathematic optimal model
CX.opt, have: QX.opt=1918kVar, CX.opt=249900 unit.
Judged from above-mentioned result of calculation, C0> CX.opt, the prompting of the reactor that installed capacity is 1918kVar is exported
Information.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that, come for those of ordinary skill in the art
Saying, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a power station reactor collocation method, it is characterised in that comprise the following steps:
Obtain the input parameter of power station reactor collocation method;
Input parameter according to described collocation method calculates power station the input impedance of dot location;
Input parameter and the input impedance of described power station dot location according to described collocation method calculate power station uneasiness
Unit during dress reactor enters phase pressure regulation cost;
Input parameter and the input impedance of described power station dot location according to described collocation method set up power station reactance
Device configuration mathematic optimal model, solves the target function value after being optimized and reactor to described mathematic optimal model
Capacity optimal solution;
Judge that described unit enters phase pressure regulation cost whether more than or equal to the size of the target function value after described optimization;
The most then export the information of the reactor that installed capacity is described capacity optimal solution.
Power station the most according to claim 1 reactor collocation method, it is characterised in that the input ginseng of described collocation method
Number includes on the connected mode of power network line, line resistance, line reactance, power station dot location, power station capacity, water power
Net electricity price, system power supply position, the natural law of wet season upper one year, reactor mounting cost, reactor year maintenance expense, reactor list
Valency and at least one in the reactor life-span.
Power station the most according to claim 1 reactor collocation method, it is characterised in that described according to described collocation method
Input parameter calculate the step of input impedance of power station dot location, including:
When in the described electrical network that power station is accessed, other all nodes in addition to system power supply position are set to open circuit, described system
Power supply is set to short circuit, and when described power station dot location are plus voltage source, measures described power station dot location
Voltage and current;
Resistance and the reactance of input impedance is obtained according to described voltage and described electric current.
Power station the most according to claim 1 reactor collocation method, it is characterised in that defeated according to described collocation method
Enter the input impedance of parameter and described power station dot location to calculate power station unit when not installing reactor and enter phase pressure regulation
Cost, including:
Wherein, TXLife-span, T for reactorWNatural law, C for the wet season upper one yearWFor hydropower net pricing, RWFor input impedance
Resistance, XWReactance, S for input impedanceWFor power station capacity.
Power station the most according to claim 1 reactor collocation method, it is characterised in that described according to described collocation method
Input parameter and the input impedance of described power station dot location set up power station reactor configuration mathematic optimal model, right
Described mathematic optimal model carries out solving the capacity optimal solution of the target function value after being optimized and reactor, including:
Wherein, CXFor target function value, QXFor reactor capacity, CWFor hydropower net pricing, TXLife-span, T for reactorWFor upper
The natural law of 1 year wet season, SWFor power station capacity, RWResistance, X for input impedanceWReactance, C for input impedanceX1For reactance
Device mounting cost, CX2For reactor maintenance expense, CX3For reactor unit price.
6. a power station reactor configuration system, it is characterised in that including:
Acquisition module, obtains the input parameter of power station reactor collocation method;
Input impedance computing module, calculates the input resistance of power station dot location according to the input parameter of described collocation method
Anti-;
Unit enters phase pressure regulation cost computing module, according to the input parameter of described collocation method and described power station dot location
Input impedance calculate power station unit when not installing reactor and enter phase pressure regulation cost;
Optimized model is set up and is solved module, defeated according to the input parameter of described collocation method and described power station dot location
Enter impedance and set up power station reactor configuration mathematic optimal model, described mathematic optimal model is solved after being optimized
The capacity optimal solution of target function value and reactor;
Judge module, it is judged that described unit enters phase pressure regulation cost whether big more than or equal to the target function value after described optimization
Little;
Information output module, the most then export the information of the reactor that installed capacity is described capacity optimal solution.
Power station the most according to claim 6 reactor configuration system, it is characterised in that described acquisition module is used for obtaining
The connected mode of power network line, line resistance, line reactance, power station dot location, power station capacity, Hydropower Entering In Power Network electricity
Valency, system power supply position, the natural law of wet season upper one year, reactor mounting cost, reactor year maintenance expense, reactor unit price and
At least one in the reactor life-span.
Power station the most according to claim 6 reactor configuration system, it is characterised in that described input impedance computing module
Input parameter according to described collocation method calculates the input impedance of grid-connected position, power station and includes:
Measuring unit is set, when in the described electrical network that power station is accessed, other all nodes in addition to system power supply position are set to
Open circuit, described system power supply are set to short circuit, and when described power station dot location are plus voltage source, measure described water power
Stand and the voltage and current of dot location;
Computing unit, obtains resistance and the reactance of input impedance according to described voltage and described electric current.
Power station the most according to claim 6 reactor configuration system, it is characterised in that described unit enters phase pressure regulation cost
Computing module calculates power station not according to the input impedance of the grid-connected position of input parameter and described power station of described collocation method
Unit when installing reactor enters phase pressure regulation cost, including:
Wherein, TXLife-span, T for reactorWNatural law, C for the wet season upper one yearWFor hydropower net pricing, RWFor input impedance
Resistance, XWReactance, S for input impedanceWFor power station capacity.
Power station the most according to claim 6 reactor configuration system, it is characterised in that described Optimized model is set up and asked
Solve module and set up Power Station according to the input parameter of described collocation method and the input impedance of described power station dot location
Anti-device configuration mathematic optimal model, solves the target function value after being optimized and reactor to described mathematic optimal model
Capacity optimal solution, including:
Wherein, CXFor target function value, QXFor reactor capacity, CWFor hydropower net pricing, TXLife-span, T for reactorWFor upper
The natural law of 1 year wet season, SWFor power station capacity, RWResistance, X for input impedanceWReactance, C for input impedanceX1For reactance
Device mounting cost, CX2For reactor maintenance expense, CX3For reactor unit price.
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