CN110165664A - A kind of decision-making technique of Distributed Power Flow controller segmentation investment construction - Google Patents
A kind of decision-making technique of Distributed Power Flow controller segmentation investment construction Download PDFInfo
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- CN110165664A CN110165664A CN201910396580.3A CN201910396580A CN110165664A CN 110165664 A CN110165664 A CN 110165664A CN 201910396580 A CN201910396580 A CN 201910396580A CN 110165664 A CN110165664 A CN 110165664A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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]
Abstract
The present invention relates to a kind of decision-making techniques of Distributed Power Flow controller segmentation investment construction, consider Distributed Power Flow controller to the ability of regulation and control of power grid, the cost of investment function of meter and distributed current transformer regulation variable is proposed respectively, economic well-being of workers and staff function caused by being promoted because of ability to transmit electricity, because voltage security stability range expand caused by economic well-being of workers and staff function and because angle stability range expand due to caused by economic well-being of workers and staff function, and propose the investment return in the case where considering safe operation of electric network constraint condition and the maximum objective function Z of cost of investment difference, solve the equation of the belt restraining, it can be concluded that the installed capacity number for building Distributed Power Flow controller by stages and in groups of Income Maximum, leave unused capital caused by one-time construction and equipment depreciation is avoided to lose.
Description
Technical field
The invention belongs to power technologies and power economy field, and in particular to a kind of Distributed Power Flow controller segmentation investment
The decision-making technique of construction carries out segmentation construction by the mentioned method of the invention, can maximize investment return.
Background technique
Distributed Power Flow controller is made of multiple groups current transformer, can be installed along transmission line of electricity, as shown in Figure 1.
Since it uses cheap power electronic devices to constitute, installing and dismounting can be charged, and by single-phase unsteady flow
Device composition, it is also stronger to the ability of regulation and control of electric system not only economically better than the flow controller of centralization, therefore, closely
The concern of more and more power workers is caused over year.
Centralized flow controller is all one-time construction, but sends outside and bear at construction completion initial stage and mid-term, power supply
Lotus demand demand is little, causes centralized flow controller installed capacity idle, also causes additional device and lose, influence to invest
Income.And Distributed Power Flow control its because its composition and mounting means advantage, can be according to the power supply and load at route both ends
Demand carry out investment construction by stages and in groups.
Summary of the invention
The present invention is mainly the technical problem for solving to wait present in the prior art；It provides a kind of according to the outer power transmission of power supply
The dynamic change of power and load power demand, while considering the Distributed Power Flow controller unit point of Distributed Power Flow ability of regulation and control
The decision-making technique of batch by batch and stage by stage investment construction, to expand on the basis of ensureing power network safety operation and normal electricity transaction
The investment return of electric power facility.
Above-mentioned technical problem of the invention is mainly to be addressed by following technical proposals:
A kind of decision-making technique of Distributed Power Flow controller segmentation investment construction, which is characterized in that by Distributed Power Flow control
Device processed carries out circuit equivalent, and definesFor supply voltage,Respectively line end voltage；For head end busbar voltage,For
End busbar voltage；For the equivalent voltage source of the 1st group of series side current transformer of DPFC,For the 2nd group of series side unsteady flow of DPFC
The equivalent voltage source of device,For the equivalent voltage source of DPFC n-th group series side current transformer；X1、X2、XnEvery group of string of respectively DPFC
Join the equivalent reactance of side, Xs、XrRespectively route first and last end reactance；ILFor line current；PL、QLFor line power；Based on following
Definition and objective function；
Successively define:
One is defined, cost of investment；
It is P that definition requires the conveying capacity of route for certain year in the futureLref(i)、QLref(i), route initial transmission electric power is
PLref(0)、QLref(0), having installed Distributed Power Flow controller capacity isWherein, n is the number of stages of construction；
Since route design capacity is immutable, Yao Tigao ability to transmit electricity can only be by the regulation of Distributed Power Flow controller
Ability, then, the Distributed Power Flow controller of the i-th demands investment want to undertake the burden requirement completely, and Distributed Power Flow
Controller is to the load flow regulation ability of transmission line of electricity mainly by variableIt acts on, the present invention proposes to embody the control variable
In the capacity S of installingse(i)In, i.e.,
Then, after considering discount rate, the present invention proposes that the cost of investment in the i-th stage is described by following formula:
Wherein, r is discount rate, and C is the investment amount of unit capacity；
Two are defined, investment return；
After installing Distributed Power Flow controller, the ability to transmit electricity of transmission line of electricity can not only be improved, moreover it is possible to expand network voltage
Safety and stability range and angle stability range；
After considering discount rate, the income for caused by promoting ability to transmit electricity, the present invention is proposed with containing variableFunction F1
It indicates, specifically:
After installing Distributed Power Flow controller, the reactive component Q of installing Distributed Power Flow controller can be passed throughse(i)Regulation
The busbar voltage of place route reaches its target valueTo improve the safety and stability range of place line voltage distribution, and it is final
It is reflected as the promotion of ability to transmit electricity；Therefore, the present invention proposes the economic receipts caused by being expanded by network voltage safety and stability range
Beneficial function are as follows:
Wherein,And Pse(i)Having for Distributed Power Flow control device capacity is installed for the i-th stage
Function power section；
Distributed Power Flow compensator changes the electric parameter of route by issuing reactive power to installed power circuit,
And the change of the electric parameter will change the angle stability nargin of power grid, the promotion of the angle stability nargin will be promoted further again
The part is included in economic well-being of workers and staff by the ability to transmit electricity of power circuit, therefore, present invention proposition, and is proposed after considering discount rate,
Economic well-being of workers and staff described function caused by being promoted as angle stability range are as follows:
Objective function Z is the difference maximum of investment return and cost of investment；I.e.
And meet the route thermostabilization limit, the angle stability limit and busbar voltage safety margins, it may be assumed that
s.t.
It specifically includes:
Step 1, hypothesis construction period are i；
Step 2, the corresponding line transmission electric power for meeting power supply transmission and load power demand when providing for the i-th stage
PLref(i),QLref(i)；
Step 3 finds current discount rate；
Step 4 provides route original transmitted ability, and Ji Jiqian (i-1) stage has put into the tune of Distributed Power Flow controller
Control ability, in conjunction with the ability of regulation and control and current discount rate of the i-th stage distributed flow controller installed capacity, by publicity (2)
Obtain the cost of investment in the i-th stage
Step 5 obtains revenue function caused by as promoting ability to transmit electricity as formula (3)
Step 6 obtains the economic well-being of workers and staff function caused by being expanded by voltage security stability range by formula (4)
Step 7 obtains the economic well-being of workers and staff function as caused by the expansion of angle stability range as formula (5)
Step 8 forms the planning such as the optimal installing capacity of the multistage Distributed Power Flow controller of formula (6) and (7) composition
Model；
Step 9, using general Dynamic Programming method for solving to the multistage programming model being made of formula (6) and formula (7) into
Row solves, and obtains the optimal installing capacity of Distributed Power Flow controller stage by stage.
Therefore, the present invention has the advantage that the present invention considers that Distributed Power Flow controller to the ability of regulation and control of power grid, divides
Economic well-being of workers and staff letter caused by not proposing the cost of investment function of meter and distributed current transformer regulation variable, being promoted because of ability to transmit electricity
Number, because voltage security stability range expand caused by economic well-being of workers and staff function and because angle stability range expand due to caused by economy receipts
Beneficial function, and propose the investment return in the case where considering safe operation of electric network constraint condition and the maximum target letter of cost of investment difference
Number Z, solves the equation of the belt restraining, it can be deduced that the device for building Distributed Power Flow controller by stages and in groups of Income Maximum holds
Number is measured, leave unused capital caused by one-time construction and equipment depreciation is avoided to lose.
Detailed description of the invention
Attached drawing 1 is Distributed Power Flow controller scheme of installation of the invention.
Attached drawing 2 is the equivalent circuit of Distributed Power Flow controller of the invention.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment:
1, the target value that the i-th stage needed Distributed Power Flow controller to regulate and control determines
To Distributed Power Flow controller shown in FIG. 1, can be carried out with circuit shown in Fig. 2 equivalent.
The equivalent circuit of Fig. 2 Distributed Power Flow controller
In figure,For supply voltage,Respectively line end voltage；For head end busbar voltage,For end bus
Voltage；For the equivalent voltage source of the 1st group of series side current transformer of DPFC,For the equivalent of the 2nd group of series side current transformer of DPFC
Voltage source,For the equivalent voltage source of DPFC n-th group series side current transformer；X1、X2、XnEvery group of series side of respectively DPFC
Equivalent reactance, Xs、XrRespectively route first and last end reactance；ILFor line current；PL、QLFor line power.
2, cost of investment
If requiring within certain year the conveying capacity of route in the future is PLref(i)、QLref(i), it is P that route, which designs transmittability,Lref(0)、
QLref(0), having installed Distributed Power Flow controller capacity isWherein, n is the number of stages of construction.
Since route design capacity is immutable, Yao Tigao ability to transmit electricity can only be by the regulation of Distributed Power Flow controller
Ability, then, the Distributed Power Flow controller of the i-th demands investment want to undertake the burden requirement completely, and Distributed Power Flow
Controller is to the load flow regulation ability of transmission line of electricity mainly by variableIt acts on, the present invention proposes to embody the control variable
In the capacity S of installingse(i)In, i.e.,
Then, after considering discount rate, the present invention obtains the cost of investment in the i-th stage are as follows:
Wherein, r is discount rate, and C is the investment amount of unit capacity.
3, investment return
After installing Distributed Power Flow controller, the ability to transmit electricity of transmission line of electricity can not only be improved, moreover it is possible to expand network voltage
Safety and stability range and angle stability range.
After considering discount rate, the income for caused by promoting ability to transmit electricity, the present invention is proposed with containing variableFunction F1
It indicates, specifically:
After installing Distributed Power Flow controller, the reactive component Q of installing Distributed Power Flow controller can be passed throughse(i)Regulation
The busbar voltage of place route reaches its target valueTo improve the safety and stability range of place line voltage distribution, and it is final anti-
Reflect the promotion for ability to transmit electricity.Therefore, the present invention proposes the economic well-being of workers and staff caused by being expanded by network voltage safety and stability range
Function are as follows:
Wherein,And Psei()Having for Distributed Power Flow control device capacity is installed for the i-th stage
Function power section.
Distributed Power Flow compensator changes the electric parameter of route by issuing reactive power to installed power circuit,
And the change of the electric parameter will change the angle stability nargin of power grid, the promotion of the angle stability nargin will be promoted further again
The ability to transmit electricity of power circuit, accordingly, it is considered to which the present invention proposes to pass through caused by being promoted as angle stability range after discount rate
Help revenue function are as follows:
4, objective function
The present invention proposes the difference of investment return and cost of investment is maximum as objective function Z.I.e.
And meet the route thermostabilization limit, the angle stability limit and busbar voltage safety margins, it may be assumed that
s.t.
5, implementation steps
Step 1, hypothesis construction period are i；
Step 2, the corresponding line transmission electric power for meeting power supply transmission and load power demand when providing for the i-th stage
PLref(i),QLref(i)；
Step 3 finds current discount rate；
Step 4 provides route original transmitted ability, and Ji Jiqian (i-1) stage has put into the tune of Distributed Power Flow controller
Control ability, in conjunction with the ability of regulation and control and current discount rate of the i-th stage distributed flow controller installed capacity, by publicity (2)
Obtain the cost of investment in the i-th stage
Step 5 obtains revenue function caused by as promoting ability to transmit electricity as formula (3)
Step 6 obtains the economic well-being of workers and staff function caused by being expanded by voltage security stability range by formula (4)
Step 7 obtains the economic well-being of workers and staff function as caused by the expansion of angle stability range as formula (5)
Step 8 forms the planning such as the optimal installing capacity of the multistage Distributed Power Flow controller of formula (6) and (7) composition
Model；
Step 9, using general Dynamic Programming method for solving to the multistage programming model being made of formula (6) and formula (7) into
Row solves, and obtains the optimal installing capacity of Distributed Power Flow controller stage by stage.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (1)
1. a kind of decision-making technique of Distributed Power Flow controller segmentation investment construction, which is characterized in that control Distributed Power Flow
Device carries out circuit equivalent, and definesFor supply voltage,Respectively line end voltage；For head end busbar voltage,For end
Hold busbar voltage；For the equivalent voltage source of the 1st group of series side current transformer of DPFC,For the 2nd group of series side current transformer of DPFC
Equivalent voltage source,For the equivalent voltage source of DPFC n-th group series side current transformer；X1、X2、XnEvery group of series connection of respectively DPFC
The equivalent reactance of side, Xs、XrRespectively route first and last end reactance；ILFor line current；PL、QLFor line power；Based on following fixed
Justice and objective function；
Successively define:
One is defined, cost of investment；
It is P that definition requires the conveying capacity of route for certain year in the futureLref(i)、QLref(i), route initial transmission electric power is PLref(0)、
QLref(0), having installed Distributed Power Flow controller capacity isWherein, n is the number of stages of construction；
Since route design capacity is immutable, Yao Tigao ability to transmit electricity, can only by the ability of regulation and control of Distributed Power Flow controller,
Then, the Distributed Power Flow controller of the i-th demands investment wants to undertake the burden requirement completely, and Distributed Power Flow controller
To the load flow regulation ability of transmission line of electricity mainly by variableIt acts on, the present invention proposes the control variable being embodied in installing
Capacity Sse(i)In, i.e.,
Then, after considering discount rate, the present invention obtains the cost of investment in the i-th stage are as follows:
Wherein, r is discount rate, and C is the investment amount of unit capacity；
Two are defined, investment return；
After installing Distributed Power Flow controller, the ability to transmit electricity of transmission line of electricity can not only be improved, moreover it is possible to expand network voltage safety
Stability range and angle stability range；
After considering discount rate, the income for caused by promoting ability to transmit electricity, the present invention is proposed with containing variableFunction F1Table
Show, specifically:
After installing Distributed Power Flow controller, the reactive component Q of installing Distributed Power Flow controller can be passed throughse(i)Where regulation
The busbar voltage of route reaches its target valueTo the safety and stability range of line voltage distribution where improving, and be finally reflected for
The promotion of ability to transmit electricity；Therefore, the present invention proposes the economic well-being of workers and staff function caused by being expanded by network voltage safety and stability range
Are as follows:
Wherein,And Pse(i)The wattful power of Distributed Power Flow control device capacity is installed for the i-th stage
Rate part；
Distributed Power Flow compensator changes the electric parameter of route by issuing reactive power to installed power circuit, and is somebody's turn to do
The change of electric parameter will change the angle stability nargin of power grid, and the promotion of the angle stability nargin will further promote electric power again
The ability to transmit electricity of route, accordingly, it is considered to after discount rate, economic well-being of workers and staff function caused by being promoted as angle stability range are as follows:
Objective function Z is the difference maximum of investment return and cost of investment；I.e.
And meet the route thermostabilization limit, the angle stability limit and busbar voltage safety margins, it may be assumed that
s.t.
It specifically includes:
Step 1, hypothesis construction period are i；
Step 2, the corresponding line transmission electric power P for meeting power supply transmission and load power demand when providing for the i-th stageLref(i),
QLref(i)；
Step 3 finds current discount rate；
Step 4 provides route original transmitted ability, and Ji Jiqian (i-1) stage has put into the regulation energy of Distributed Power Flow controller
Power is obtained in conjunction with the ability of regulation and control and current discount rate of the i-th stage distributed flow controller installed capacity by publicity (2)
The cost of investment in the i-th stage
Step 5 obtains revenue function caused by as promoting ability to transmit electricity as formula (3)
Step 6 obtains the economic well-being of workers and staff function caused by being expanded by voltage security stability range by formula (4)
Step 7 obtains the economic well-being of workers and staff function as caused by the expansion of angle stability range as formula (5)
Step 8 forms the plan model such as the optimal installing capacity of the multistage Distributed Power Flow controller of formula (6) and (7) composition；
Step 9 seeks the multistage programming model being made of formula (6) and formula (7) using general Dynamic Programming method for solving
Solution, obtains the optimal installing capacity of Distributed Power Flow controller stage by stage.
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Cited By (1)
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|---|---|---|---|---|
| CN112803418A (en) * | 2021-01-28 | 2021-05-14 | 武汉大学 | Distributed power flow controller configuration method considering load and new energy output uncertainty |
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