CN106712041A - Higher and lower class voltage coordination control method of 220kV collection substation - Google Patents

Higher and lower class voltage coordination control method of 220kV collection substation Download PDF

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Publication number
CN106712041A
CN106712041A CN201611150190.0A CN201611150190A CN106712041A CN 106712041 A CN106712041 A CN 106712041A CN 201611150190 A CN201611150190 A CN 201611150190A CN 106712041 A CN106712041 A CN 106712041A
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China
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voltage
station
collects
collection bus
transformer station
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CN106712041B (en
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陆海
苏适
汤磊
严玉廷
廖小梦
杨家全
王志南
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Electric Power Research Institute of Yunnan Power System Ltd
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Electric Power Research Institute of Yunnan Power System Ltd
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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
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention provides a higher and lower class voltage coordination control method of a 220kV collection substation, comprising the following steps: acquiring the current voltage of a 110kV collection bus of the ith 220kV collection substation in a regional power grid, judging whether the voltage is out of limit; if the voltage is out of limit, calculating the ability of all low class 110kV regenerative energy terminal yards carried by the 110kV collection bus of the ith 220kV collection substation to regulate the voltage of the 110kV collection bus; evaluating whether the voltage regulating ability is sufficient; if the voltage regulating ability is sufficient, regulating the voltage of the 110kV collection bus by using the low class 110kV regenerative energy terminal yards; and if the voltage regulating ability is insufficient, regulating the voltage of the 110kV collection bus by using reactive power equipment of the ith 220kV collection substation. The method provided by the invention can give full play to the reactive power regulating ability of the regenerative energy stations, and avoid a great deal of excess reactive power generated by excessive capacitors or reactors.

Description

220kV collects the step voltage control method for coordinating up and down of transformer station
Technical field
Collect change the present invention relates to regenerative resource collection region voltage control technology field, more particularly to a kind of 220kV The step voltage control method for coordinating up and down in power station.
Background technology
In recent years, influenceed by global warming and energy crisis, the importance of clean energy resource is increasingly highlighted, its apoplexy Power generates electricity and the regenerative resource such as photovoltaic generation is due to its huge potentiality to be exploited and the development technique of relative maturity, by generation The extensive concern of various countries of boundary, and got up with a kind of unprecedented speed fast development.
What China was taken regenerative resource is the development mode of extensive centralization, as shown in figure 1, at present China can Regenerated energy source station is all that several 110kV stations are linked into power network by a 220kV transformer station, and this 220kV transformer station is referred to as converging Collection station, the 110kV renewable energies source station for collecting station and following band is referred to as a new energy collection region.Because regenerative resource is solid The intermittent feature having, extensive regenerative resource is grid-connected to bring greatly challenge to operation of power networks scheduling.Again because can be again Simultaneously web area often lacks local load to the raw energy, and the electric energy that regenerative resource sends is needed by voltage levels, transmission of electricity long Circuit, delivers to the load center in a distant place, and these regenerative resource transfer passages often lack conventional extreme misery power plant carry out it is active, Idle support, system short circuit capacity is smaller, and this change for resulting in renewable energy source capability can trigger larger voltage pulsation, Voltage pulsation in 110kV collection bus especially as shown in Figure 1, can even cause extensive chain off-grid when serious.
In the prior art, in order to avoid the voltage pulsation in 110kV collection bus, often in ground state by collecting Transformer station sets multiple capacitors or reactor, and 110kV collection bus voltages are adjusted by the switching of capacitor or reactor, But excessive capacitor or reactor can cause to produce substantial amounts of superfluous reactive power.
The content of the invention
In order to overcome problem present in correlation technique, the present invention to provide the superior and the subordinate's electricity that a kind of 220kV collects transformer station Pressure control method for coordinating, 110kV buses are adjusted by preferential using the Reactive-power control ability of subordinate's renewable energy source station itself Voltage so that the Reactive-power control ability of renewable energy source station itself is not fully exerted.When subordinate's regenerative resource station itself Reactive-power control scarce capacity when, just by switching higher level 220kV collect station in capacitor, reactor, it is ensured that renewable energy Source station collection bus voltage is in N-1 security domains.Such upper and lower step voltage control method for coordinating can give full play in ground state The Reactive-power control ability of renewable energy source station itself, substitution static capacitors or reactor play voltage support effect, it is to avoid Excessive capacitor or reactor cause to be produced during fault disturbance excessive idle under ground state.
One side according to embodiments of the present invention, there is provided the step voltage up and down that a kind of 220kV collects transformer station is coordinated Control method, it is characterised in that 220kV collects transformer station and connects subordinate 110kV regenerative resources by 110kV collection bus Stand, methods described is included in when controlling cycle arrives and performs following steps：Step S1, i-th 220kV converges in obtaining area power grid Collect the current voltage value of the 110kV collection bus of transformer station, judge the current voltage value whether in control bound scope Interior, wherein i is natural number, and 220kV collects the sum of transformer station in 1≤i≤area power grid；Step S2, if the current electricity Pressure value is within the scope of the control bound, then make i=i+1, is returned and is performed step S1；Step S3, if described current Magnitude of voltage calculates the 110kV collection bus institute band that i-th 220kV collects transformer station beyond the control bound scope Whole subordinate 110kV regenerative resources stations to the voltage regulation capability of 110kV collection bus；Step S4, under assessment whole Whether the voltage regulation capability of level 110kV regenerative resources station is enough by the voltage Tiao Jiedao institutes of corresponding 110kV collection bus State in the range of control bound；Step S5, if the voltage regulation capability of whole subordinate 110kV regenerative resources stations enough will Controlled in the range of bound described in the voltage Tiao Jiedao of 110kV collection bus, then adjusted using subordinate 110kV regenerative resources station Save the voltage of 110kV collection bus；Step S6, if the voltage regulation capability of whole subordinate 110kV regenerative resources stations is not Be enough to be controlled in the range of bound described in the voltage Tiao Jiedao by 110kV collection bus, then can except using whole subordinate 110kV Outside the voltage of renewable sources of energy station regulation 110kV collection bus, also collect the idle of transformer station using i-th 220kV The voltage of equipment supplement regulation 110kV collection bus；Step S7, makes i=i+1, performs step S1.
Preferably, the step S1 includes：
Step S11, obtain in real time i-th 220kV collect transformer station 110kV collection bus current voltage value and Control upper lower limit value, wherein, current voltage value is denoted as being Vi cur, lower control limit value is denoted as Vi min, upper control limit value is denoted as Vi max；
Step S12, checks 110kV collection bus current voltages Vi curWhether in the range of control bound：
Vi min+Vi dead＜ Vi cur＜ Vi max-Vi dead (1)
Wherein, Vi deadFor 110kV collection bus voltage out-of-limit judges dead band threshold value；
If formula (1) is set up, it is determined that the 110kV collection bus voltage that i-th 220kV collects transformer station is in control Within the scope of bound processed；If above formula is invalid, it is determined that i-th 220kV collects the 110kV collection bus of transformer station Voltage is beyond control bound scope.
Preferably, step S3 includes：
Step S31, i-th 220kV described in real-time reception collects the jZuo subordinates 110kV regenerative resources in transformer station Increasing for being sent on station is idle and can subtract idle, and according to the idle to corresponding of jZuo subordinates 110kV regenerative resources station The voltage sensibility of 110kV collection bus, calculates jZuo subordinate 110kV regenerative resources stations and collects mother to corresponding 110kV The voltage of line increases regulating powerRegulating power is reduced with voltage
WhereinThe jZuo subordinates 110kV collected for i-th 220kV in transformer station is renewable Increasing for being sent on energy station is real-time is idle and can subtract idle,It is the jZuo subordinates 110kV regenerative resources station The idle sensitivity to 110kV collection bus up voltages,It is the nothing of the jZuo subordinates 110kV regenerative resources station The sensitivity of voltage drops to 110kV collection bus in work(, and j is natural number, and 1≤j≤the i-th 220kV collects subordinate in transformer station The sum of 110kV regenerative resources station；
Step S32, makes j=j+1, returns and performs step S31；
Step S33, i-th 220kV is collected whole subordinate 110kV regenerative resources stations pair of transformer station The voltage regulation capability of 110kV collection bus adds up, and show that i-th 220kV collects the 110kV collection bus institute of transformer station Voltage regulation capability of the whole subordinate 110kV regenerative resources stations of band to 110kV collection bus：
Preferably, step S4 includes：
Step S41, assesses i-th 220kV and collects whole subordinate 110kV regenerative resources stations pair in transformer station Whether the voltage of 110kV collection bus reduces regulating power sufficient：
IfThen i-th 220kV has collected in transformer station 110kV collection bus or has connect The upper limit closely is crossed, it is necessary to be depressured, then judge whether following equation is set up：
Vi max-Vi cur＜ Vi Down (4)
If formula (4) is set up, judge that i-th 220kV collects whole subordinate 110kV renewable energies of substation's band Source station voltage reduces that regulating power is not enough, it is necessary to the reactive apparatus that i-th 220kV collects transformer station coordinate step-down,
Wherein：Vi deadFor 110kV collection bus voltage out-of-limit judges threshold value, Vi curFor 110kV collection bus are currently electric Pressure value, Vi maxIt is 110kV collection bus voltage upper control limit values, Vi DownFor i-th 220kV collects in transformer station all Regulating power is reduced 110kV regenerative resources station to the voltage of 110kV collection bus；
Step S42, assesses i-th 220kV and collects whole subordinate 110kV regenerative resources stations pair in transformer station Whether the voltage of 110kV collection bus increases regulating power sufficient：
IfThen i-th 220kV has collected in transformer station 110kV collection bus or has connect Lower limit closely is crossed, it is necessary to boost, then judge whether following equation is set up：
Vi min-Vi cur＞ Vi Up (5)
If formula (5) is set up, judge that i-th 220kV collects whole subordinate 110kV renewable energies of substation's band Source station voltage increases that regulating power is not enough, it is necessary to the reactive apparatus that i-th 220kV collects transformer station coordinate boosting,
Wherein：Vi deadFor 110kV collection bus voltage out-of-limit judges threshold value, Vi curFor 110kV collection bus are currently electric Pressure value, Vi minIt is 110kV collection bus voltage lower control limit values, Vi UpFor i-th 220kV collects in transformer station all 110kV regenerative resources station increases regulating power to the voltage of 110kV collection bus.
Preferably, step S6 includes：
Step S61, if step S41 judges that the reactive apparatus for needing i-th 220kV to collect transformer station coordinate drop Pressure, then：If i-th 220kV collects the capacitor that transforming plant main transformer low-pressure side has operation, a reactor is cut off； Otherwise put into a reactor；
Step S62, if step S42 judges that the reactive apparatus for needing i-th 220kV to collect transformer station are coordinated to rise Pressure, then：If i-th 220kV collects the reactor that transforming plant main transformer low-pressure side has operation, a reactor is cut off； Otherwise put into a capacitor.
Preferably, the subordinate 110kV regenerative resources station is wind power station or photo-voltaic power generation station.
Preferably, it was a controlling cycle every 5 minutes.
As described above, the invention provides the step voltage control method for coordinating up and down that a kind of 220kV collects transformer station, it is special Levy and be, 220kV collects transformer station and connects subordinate 110kV regenerative resources station, methods described bag by 110kV collection bus Include and perform following steps when controlling cycle arrives：Step S1, i-th 220kV collects transformer station in obtaining area power grid Whether the current voltage value of 110kV collection bus, judges the current voltage value in the range of control bound, and wherein i is Natural number, 220kV collects the sum of transformer station in 1≤i≤area power grid；Step S2, if the current voltage value is in institute State within the scope of control bound, then make i=i+1, return and perform step S1；Step S3, if the current voltage value exceeds The control bound scope, calculates whole subordinates that i-th 220kV collects the 110kV collection bus institute band of transformer station Voltage regulation capability of the 110kV regenerative resources station to 110kV collection bus；Step S4, assessment whole subordinate 110kV can be again Whether the voltage regulation capability of raw energy station will control bound described in the voltage Tiao Jiedao of corresponding 110kV collection bus enough In the range of；Step S5, if 110kV is collected mother by the voltage regulation capability of whole subordinate 110kV regenerative resources stations enough Controlled in the range of bound described in the voltage Tiao Jiedao of line, then collected using subordinate's 110kV regenerative resources station regulation 110kV The voltage of bus；Step S6, if the voltage regulation capability of whole subordinate 110kV regenerative resources stations is not enough to 110kV Controlled in the range of bound described in the voltage Tiao Jiedao of collection bus, then except using whole subordinate 110kV regenerative resources Stand outside the voltage of regulation 110kV collection bus, the reactive apparatus for also collecting transformer station using i-th 220kV are supplemented to be adjusted Save the voltage of 110kV collection bus；Step S7, makes i=i+1, performs step S1.220kV of the invention collects the upper of transformer station Subordinate voltage control method for coordinating adjusts 110kV by preferential using the Reactive-power control ability of subordinate's renewable energy source station itself The voltage of bus so that the Reactive-power control ability of renewable energy source station itself is not fully exerted.When new energy collection region During Reactive-power control scarce capacity, capacitor, the reactor in station are just collected by switching 220kV, it is ensured that renewable energy source station is female Line voltage is in N-1 security domains.Such upper and lower step voltage control method for coordinating can give full play to regenerative resource in ground state Stand the Reactive-power control ability of itself, substitution static capacitors or reactor play voltage support effect, it is to avoid excessive under ground state Capacitor or reactor cause to be produced during fault disturbance it is excessive idle.Therefore, the present invention realizes higher level 220kV collects transformer station and coordinates control with the reactive voltage of subordinate's 110kV renewable energies source station, when subordinate's 110kV renewable energies When source station is not enough to the voltage regulation capability of 110kV busbar voltages, ensure renewable by switching substation capacitors, reactor Energy source station busbar voltage is in N-1 security domains, it is to avoid regenerative resource Voltage Drop causes the chain off-grid in regenerative resource station, Improve Network Voltage Stability and quality of voltage.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not Can the limitation present invention.
Brief description of the drawings
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows and meets implementation of the invention Example, and be used to explain principle of the invention together with specification.
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, for those of ordinary skill in the art Speech, without having to pay creative labor, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is new energy collection region power grid architecture schematic diagram；
Fig. 2 is the flow of the control method for coordinating of step voltage up and down that 220kV provided in an embodiment of the present invention collects transformer station Schematic diagram.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment Described in implementation method do not represent and the consistent all implementation methods of the present invention.Conversely, they be only with it is such as appended The example of the consistent apparatus and method of some aspects being described in detail in claims, of the invention.
Generally, area power grid new energy collection region generally includes a 220kV and collects transformer station and multiple subordinate 110kV Regenerative resource station, these subordinates 110kV regenerative resources station is collected transformer station and is linked into power network by 220kV, The 110kV collection bus that 220kV collects transformer station connect these subordinates 110kV regenerative resources station.In new energy pooling zone The voltage in domain is coordinated in control, in order to avoid occurring, due to the extensive chain off-grid that voltage is caused, should fully being sent out in ground state The Reactive-power control ability of renewable energy source station itself is waved, is acted on replacing direct capacitance to play voltage support, it is to avoid under ground state Excessive input capacitor causes to be produced during fault disturbance excessive idle.Therefore, in the present invention, regenerative resource Stand as follows with the reactive voltage coordination principle for collecting station transformer station：
1st, the preferential Reactive-power control ability using renewable energy source station under ground state.
When the renewable energy source station in new energy collection region has Reactive-power control ability, regenerative resource is preferentially used Stand the Reactive-power control ability of itself, the voltage limits that it collects transformer station are using plan limit value so that renewable energy source station bus Voltage is in N-1 security domains.
2nd, when the Reactive-power control scarce capacity of new energy collection region, entered using the low-pressure side reactive apparatus collected in station Row new energy collection region voltage-regulation.
When renewable energy source station Reactive-power control scarce capacity and can not in the N-1 security domains when, by switching 220kV Collect capacitor, the reactor in station, it is ensured that renewable energy source station busbar voltage is in N-1 security domains.
Coordinate control original with the reactive voltage of subordinate's 110kV regenerative resources station to realize that above-mentioned 220kV collects station Then, the present invention is proposed and realizes a kind of method for coordinating control.As shown in Fig. 2 220kV collects the step voltage up and down of transformer station Control method for coordinating is included in when controlling cycle (being a controlling cycle every 5 minutes) arrives and performs following steps：
Step S1, obtains the current voltage value that i-th 220kV in area power grid collects the 110kV collection bus of transformer station, Whether current voltage value is judged in the range of control bound, and wherein i is natural number, and 220kV converges in 1≤i≤area power grid Collect the sum of transformer station.
Step S2, if current voltage value is within the scope of control bound, makes i=i+1, returns and performs step S1, that is to say, that obtain the current voltage value that next 220kV collects the 110kV collection bus of transformer station.
Step S3, if current voltage value is beyond control bound scope, calculates i-th 220kV and collects transformer station Voltage regulation capability of the whole subordinate 110kV regenerative resources stations of 110kV collection bus institute band to 110kV collection bus.
Step S4, whether the voltage regulation capability of the whole subordinate 110kV regenerative resources stations of assessment enough will be corresponding In the range of the voltage Tiao Jiedao control bounds of 110kV collection bus.
Step S5, if 110kV is collected mother by the voltage regulation capability of whole subordinate 110kV regenerative resources stations enough In the range of the voltage Tiao Jiedao control bounds of line, then using subordinate 110kV regenerative resources station regulation 110kV collection bus Voltage.
Step S6, if the voltage regulation capability of whole subordinate 110kV regenerative resources stations is not enough to collect 110kV Controlled in the range of bound described in the voltage Tiao Jiedao of bus, then except being adjusted using whole subordinate 110kV regenerative resources stations Save outside the voltage of 110kV collection bus, the reactive apparatus for also collecting transformer station using i-th 220kV supplement regulation The voltage of 110kV collection bus.
Step S7, makes i=i+1, performs step S1.That is, collecting transformer station to next 220kV carries out voltage association Regulation and control system.
Embodiments in accordance with the present invention, subordinate's 110kV regenerative resources station can be wind power station or photovoltaic generation Stand.
According to one embodiment of present invention, above-mentioned steps S1 can specifically include：
Step S11, obtain in real time i-th 220kV collect transformer station 110kV collection bus current voltage value and Control bound scope, wherein current voltage value is designated as Vi cur, lower control limit value is denoted as Vi min, upper control limit value is denoted as Vi max。
Step S12, checks 110kV collection bus current voltages Vi curWhether in the range of control bound：
Vi min+Vi dead＜ Vi cur＜ Vi max-Vi dead (1)
Wherein, Vi deadFor 110kV collection bus voltage out-of-limit judges dead band threshold value.
If formula (1) is set up, it is determined that the 110kV collection bus voltage that i-th 220kV collects transformer station is in control Within the scope of bound processed；If above formula is invalid, it is determined that i-th 220kV collects the 110kV collection bus of transformer station Voltage is beyond control bound scope.
According to one embodiment of present invention, above-mentioned steps S3 can specifically include：
Step S31, i-th 220kV described in real-time reception collects the jZuo subordinates 110kV regenerative resources in transformer station Increasing for being sent on station is idle and can subtract idle, and according to the idle to corresponding of jZuo subordinates 110kV regenerative resources station The voltage sensibility of 110kV collection bus, calculates jZuo subordinate 110kV regenerative resources stations and collects mother to corresponding 110kV The voltage of line increases regulating powerRegulating power is reduced with voltage
WhereinThe jZuo subordinates 110kV collected for i-th 220kV in transformer station is renewable Increasing for being sent on energy station is real-time is idle and can subtract idle,It is the jZuo subordinates 110kV regenerative resources station The idle sensitivity to 110kV collection bus up voltages,It is the nothing of the jZuo subordinates 110kV regenerative resources station The sensitivity of voltage drops to 110kV collection bus in work(, and j is natural number, and 1≤j≤the i-th 220kV collects subordinate in transformer station The sum of 110kV regenerative resources station.
Step S32, makes j=j+1, returns and performs step S31.That is, reception i-th 220kV collects in transformer station Next subordinate's 110kV regenerative resources station increases idle and can subtract idle.
Step S33, i-th 220kV is collected whole subordinate 110kV regenerative resources stations pair of transformer station The voltage regulation capability of 110kV collection bus adds up, and show that i-th 220kV collects the 110kV collection bus institute of transformer station Voltage regulation capability of the whole subordinate 110kV regenerative resources stations of band to 110kV collection bus：
According to one embodiment of present invention, above-mentioned steps S4 can specifically include：
Step S41, assesses i-th 220kV and collects whole subordinate 110kV regenerative resources stations pair in transformer station Whether the voltage of 110kV collection bus reduces regulating power sufficient：
IfThen i-th 220kV has collected in transformer station 110kV collection bus or has connect The upper limit closely is crossed, it is necessary to be depressured, then judge whether following equation is set up：
Vi max-Vi cur＜ Vi Down (4)
If formula (4) is set up, judge that i-th 220kV collects whole subordinate 110kV renewable energies of substation's band Source station voltage reduces that regulating power is not enough, it is necessary to the reactive apparatus that i-th 220kV collects transformer station coordinate step-down,
Wherein：Vi deadFor 110kV collection bus voltage out-of-limit judges threshold value, Vi curFor 110kV collection bus are currently electric Pressure value, Vi maxIt is 110kV collection bus voltage upper control limit values, Vi DownFor i-th 220kV collects in transformer station all Regulating power is reduced 110kV regenerative resources station to the voltage of 110kV collection bus.
Step S42, assesses i-th 220kV and collects whole subordinate 110kV regenerative resources stations pair in transformer station Whether the voltage of 110kV collection bus increases regulating power sufficient：
If Vi cur＜ Vi min+Vi dead, then i-th 220kV collected in transformer station 110kV collection bus or connect Lower limit closely is crossed, it is necessary to boost, then judge whether following equation is set up：
Vi min-Vi cur＞ Vi Up (5)
If formula (5) is set up, judge that i-th 220kV collects whole subordinate 110kV renewable energies of substation's band Source station voltage increases that regulating power is not enough, it is necessary to the reactive apparatus that i-th 220kV collects transformer station coordinate boosting,
Wherein：Vi deadFor 110kV collection bus voltage out-of-limit judges threshold value, Vi curFor 110kV collection bus are currently electric Pressure value, Vi minIt is 110kV collection bus voltage lower control limit values, Vi UpFor i-th 220kV collects in transformer station all 110kV regenerative resources station increases regulating power to the voltage of 110kV collection bus.
According to one embodiment of present invention, above-mentioned steps S6 can specifically include：
Step S61, if step S41 judges that the reactive apparatus for needing i-th 220kV to collect transformer station coordinate drop Pressure, then：If i-th 220kV collects the capacitor that transforming plant main transformer low-pressure side has operation, a capacitor is cut off； Otherwise put into a reactor.
Step S62, if step S42 judges that the reactive apparatus for needing i-th 220kV to collect transformer station are coordinated to rise Pressure, then：If i-th 220kV collects the reactor that transforming plant main transformer low-pressure side has operation, a reactor is cut off； Otherwise put into a capacitor.
The description 220kV of the invention that illustrated with reference to Fig. 1 collects the step voltage control method for coordinating up and down of transformer station. Fig. 1 is the new energy collection region power grid architecture schematic diagram of area power grid.As shown in figure 1, area power grid new energy collection region Collect transformer station and three subordinate 110kV wind power station B, 110kV wind power station C and 110kV photovoltaic station D including a 220kV, this three Individual subordinate 110kV regenerative resources station is collected transformer station and is linked into power network by 220kV, and 220kV collects transformer station 110kV collection bus connect these three subordinates 110kV regenerative resources station.SVC is provided with each regenerative resource station (Static Var Compensator, SVC).
For the area power grid shown in Fig. 1,220kV of the invention collects station with subordinate's 110kV regenerative resources station Voltage control method for coordinating, then, to perform following steps in controlling cycle (being a controlling cycle every 5 minutes)：
Wherein, the current voltage that 220kV collects station 110kV collection bus is 117.62kV, upper control limit value is 117.50kV, lower control limit value is 110.70kV, and the method presets controlling cycle T, specifically includes following steps：
Come interim in each controlling cycle T (every 5 minutes being a controlling cycle), perform following steps：
1) check that the 220kV of i-th regenerative resource station in area power grid collects the electricity of the 110kV collection bus in station Pressure situation, execution is calculated as below：
Current voltage value, the control upper lower limit value of 110kV collection bus 1-1) are obtained in real time, and wherein current voltage value is designated as Vi cur, lower control limit value is denoted as Vi min, upper control limit value is denoted as Vi max.Wherein, Vi cur=117.62kV, Vi max=117.50kV, Vi min=110.70kV, Vi dead=0.5kV；
1-2) check 110kV collection bus current voltages Vi curWhether in the range of control bound：
Due to Vi cur>Vi max-Vi dead, the 110kV collection bus voltages of 110kV regenerative resources station have got over the upper limit, have entered Enter next step 2)；
2) the subordinate's 110kV regenerative resources station for collecting the 110kV collection bus institute band at station to 220kV performs following meter Calculate：
That 2-1) is sent on wind power plant B, C and photovoltaic station D in real-time reception collection region increases idle and can subtract idle, and root According to the idle voltage sensibility to 110kV collection bus of renewable sources of energy station, calculate the renewable sources of energy station and 110kV is collected The voltage increase and decrease regulating power of bus.
Wind power plant B：
Upward adjustable voltage：
Downward adjustable voltage：
Wind power plant C：
Upward adjustable voltage：
Downward adjustable voltage：
Photovoltaic station D：
Upward adjustable voltage：
Downward adjustable voltage：
The voltage regulation capability of wind power plant B, C and photovoltaic station D 2-2) is accumulated to the total voltage regulation capability of collection region In：
Vi Up=0.0, Vi Down=0.0.
3) assessment 220kV collects the interior regenerative resource station in station to collecting the voltage-regulation energy of 110kV collection bus in station Power, method is as follows：
3-1) current Vi cur=117.62kV, Vi max=117.50kV, takesCurrent Vi cur＞ Vi max- Vi dead(117.62>117.50-0.50), then 110kV collection bus voltage has got over the upper limit；
ΔVi=Vi max-Vi cur=-0.12, Δ Vi＜ Vi Down(-0.12<0.0), then judge that 220kV collects and stand interior renewable It is not enough, it is necessary to coordinate step-down that the voltage of energy station reduces regulating power.
4) according to step 3) to 220kV collect station in renewable sources of energy station voltage regulation capability assessment result, calculate 220kV collects the reactive apparatus Switching Strategy of transformer station.
4-1) pass through 3-1) judge to be currently needed for coordinating step-down, if 220kV collects the electricity that station owner's low pressure side has operation Container, then cut off a capacitor；Otherwise put into a reactor.
5) return to step 1), the 220kV for continuing with next renewable sources of energy station collects transformer station, until complete in power network The 220kV of portion renewable sources of energy station collects transformer station's treatment to be completed.
In sum, 220kV of the invention collects the control method for coordinating of step voltage up and down of transformer station by preferential utilization The Reactive-power control ability of subordinate's renewable energy source station itself adjusts the voltage of 110kV buses so that renewable energy source station itself Reactive-power control ability be not fully exerted.When the Reactive-power control scarce capacity of new energy collection region, just by switching 220kV collects capacitor, the reactor in station, it is ensured that renewable energy source station busbar voltage is in N-1 security domains.It is such upper and lower Step voltage control method for coordinating can give full play to the Reactive-power control ability of renewable energy source station itself in ground state, and substitution is static Capacitor or reactor play voltage support effect, it is to avoid excessive capacitor or reactor cause in fault disturbance under ground state During produce it is excessive idle.Therefore, the present invention realizes higher level 220kV to collect transformer station renewable with subordinate 110kV The reactive voltage of energy source station coordinates control, is preferentially adjusted using the Reactive-power control ability of subordinate's renewable energy source station itself The voltage of 110kV collection bus, when subordinate's 110kV renewable energies source station is to the voltage regulation capability of 110kV collection bus voltages When not enough, ensure renewable energy source station collection bus voltage in N-1 security domains by switching higher level substation capacitors, reactor In, it is to avoid regenerative resource station Voltage Drop causes the chain off-grid in regenerative resource station, improves Network Voltage Stability And quality of voltage.
Those skilled in the art considering specification and practice here after disclosure of the invention, will readily occur to it is of the invention its Its embodiment.The application is intended to any modification of the invention, purposes or adaptations, these modifications, purposes or Person's adaptations follow general principle of the invention and including undocumented common knowledge in the art of the invention Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following Claim is pointed out.
It should be appreciated that the invention is not limited in the precision architecture being described above and be shown in the drawings, and And can without departing from the scope carry out various modifications and changes.The scope of the present invention is only limited by appended claim.

Claims (7)

1. a kind of 220kV collects the step voltage control method for coordinating up and down of transformer station, it is characterised in that 220kV collects transformer station Subordinate 110kV regenerative resources station is connected by 110kV collection bus, methods described is included in when controlling cycle arrives and performs Following steps：
Step S1, obtains the current voltage value that i-th 220kV in area power grid collects the 110kV collection bus of transformer station, judges Whether in the range of control bound, wherein i is natural number to the current voltage value, and 220kV converges in 1≤i≤area power grid Collect the sum of transformer station；
Step S2, if the current voltage value is within the scope of the control bound, makes i=i+1, and return performs step Rapid S1；
Step S3, if the current voltage value calculates i-th 220kV and collect change beyond the control bound scope Voltage-regulation of the whole subordinate 110kV regenerative resources stations of the 110kV collection bus institute band in power station to 110kV collection bus Ability；
Whether step S4, the voltage regulation capability of the whole subordinate 110kV regenerative resources stations of assessment enough converges corresponding 110kV Collect in the range of control bound described in the voltage Tiao Jiedao of bus；
Step S5, if the voltage regulation capability of whole subordinate 110kV regenerative resources stations is enough by 110kV collection bus Controlled in the range of bound described in voltage Tiao Jiedao, then using subordinate 110kV regenerative resources station regulation 110kV collection bus Voltage；
Step S6, if the voltage regulation capability of whole subordinate 110kV regenerative resources stations is not enough to 110kV collection bus Voltage Tiao Jiedao described in the range of control bound, then except using whole subordinate 110kV regenerative resources stations regulations Outside the voltage of 110kV collection bus, the reactive apparatus supplement regulation 110kV of transformer station is also collected using i-th 220kV The voltage of collection bus；
Step S7, makes i=i+1, performs step S1.
2. 220kV according to claim 1 collects the step voltage control method for coordinating up and down of transformer station, it is characterised in that The step S1 includes：
Step S11, obtain in real time i-th 220kV collect transformer station 110kV collection bus current voltage value and control Upper lower limit value, wherein current voltage value are designated asLower control limit value is denoted asUpper control limit value is denoted asStep S12, Check 110kV collection bus current voltagesWhether in the range of control bound：
Vi min+Vi dead＜ Vi cur＜ Vi max-Vi dead (1)
Wherein,For 110kV collection bus voltage out-of-limit judges dead band threshold value；
If formula (1) is set up, it is determined that the 110kV collection bus voltage that i-th 220kV collects transformer station is in control Within lower range；If above formula is invalid, it is determined that i-th 220kV collects the 110kV collection bus voltages of transformer station Beyond control bound scope.
3. 220kV according to claim 2 collects the step voltage control method for coordinating up and down of transformer station, it is characterised in that Step S3 includes：
Step S31, i-th 220kV described in real-time reception collects the jZuo subordinates 110kV regenerative resources station in transformer station On send increase it is idle and can subtract idle, and according to the idle to corresponding of jZuo subordinates 110kV regenerative resources station The voltage sensibility of 110kV collection bus, calculates jZuo subordinate 110kV regenerative resources stations and collects mother to corresponding 110kV The voltage of line increases regulating powerRegulating power is reduced with voltage
V j U p = C j U p * Q j U p V j D o w n = C j D o w n * Q j D o w n - - - ( 2 )
WhereinCollect the jZuo subordinates 110kV regenerative resources in transformer station for i-th 220kV Increasing for being sent on station is real-time is idle and can subtract idle,It is idle for the jZuo subordinates 110kV regenerative resources station Sensitivity to 110kV collection bus up voltages,It is idle right for the jZuo subordinates 110kV regenerative resources station The sensitivity of voltage drops in 110kV collection bus, and j is natural number, and subordinate 110kV can during 1≤j≤the i-th 220kV collects transformer station The sum of renewable sources of energy station；
Step S32, makes j=j+1, returns and performs step S31；
Step S33, whole subordinate 110kV regenerative resources stations that i-th 220kV collects transformer station are converged to 110kV The voltage regulation capability for collecting bus adds up, and show that i-th 220kV collects the complete of the 110kV collection bus institute band of transformer station Voltage regulation capability of the subordinate level 110kV regenerative resources station to 110kV collection bus：
V i U p = &Sigma; j n V j U p V i D o w n = &Sigma; j n V j D o w n - - - ( 3 ) .
4. 220kV according to claim 3 collects the step voltage control method for coordinating up and down of transformer station, it is characterised in that Step S4 includes：
Step S41, assesses i-th 220kV and collects in transformer station whole subordinate 110kV regenerative resources stations to 110kV Whether the voltage of collection bus reduces regulating power sufficient：
IfThen i-th 220kV has collected in transformer station 110kV collection bus or close to more The upper limit is crossed, it is necessary to be depressured, then judges whether following equation is set up：
Vi max-Vi cur＜ Vi Down (4)
If formula (4) is set up, judge that i-th 220kV collects whole subordinate 110kV regenerative resources of substation's band Voltage of standing reduces that regulating power is not enough, it is necessary to the reactive apparatus that i-th 220kV collects transformer station coordinate step-down,
Wherein：For 110kV collection bus voltage out-of-limit judges threshold value,It is 110kV collection bus current voltage values,It is 110kV collection bus voltage upper control limit values,For i-th 220kV collects whole subordinates in transformer station Regulating power is reduced 110kV regenerative resources station to the voltage of 110kV collection bus；
Step S42, assesses i-th 220kV and collects in transformer station whole subordinate 110kV regenerative resources stations to 110kV Whether the voltage of collection bus increases regulating power sufficient：
IfWhether control bus then judge following equation or close to more lower limit, it is necessary to boost Set up：
Vi min-Vi cur＞ Vi Up (5)
If formula (5) is set up, judge that i-th 220kV collects whole subordinate 110kV regenerative resources of substation's band Voltage of standing increases that regulating power is not enough, it is necessary to the reactive apparatus that i-th 220kV collects transformer station coordinate boosting,
Wherein：For 110kV collection bus voltage out-of-limit judges threshold value,It is 110kV collection bus current voltage values,It is 110kV collection bus voltage lower control limit values,For i-th 220kV collects whole subordinates in transformer station 110kV regenerative resources station increases regulating power to the voltage of 110kV collection bus.
5. 220kV according to claim 4 collects the step voltage control method for coordinating up and down of transformer station, it is characterised in that Step S6 includes：
Step S61, if step S41 judges that the reactive apparatus for needing i-th 220kV to collect transformer station coordinate step-down,： If i-th 220kV collects the capacitor that transforming plant main transformer low-pressure side has operation, a capacitor is cut off；Otherwise throw Enter a reactor；
Step S62, if step S42 judges that the reactive apparatus for needing i-th 220kV to collect transformer station coordinate boosting,： If i-th 220kV collects the reactor that transforming plant main transformer low-pressure side has operation, a reactor is cut off；Otherwise throw Enter a capacitor.
6. 220kV according to claim 1 collects the step voltage control method for coordinating up and down of transformer station, it is characterised in that The subordinate 110kV regenerative resources station is wind power station or photo-voltaic power generation station.
7. 220kV according to claim 1 collects the step voltage control method for coordinating up and down of transformer station, it is characterised in that It was a controlling cycle every 5 minutes.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104579165A (en) * 2015-01-22 2015-04-29 国家电网公司 Photovoltaic power station dynamic reactive response performance site testing method
CN105140964A (en) * 2015-09-24 2015-12-09 中国南方电网有限责任公司 10kV power distribution network power coordination control method with photovoltaic power supply
CN105914797A (en) * 2015-12-24 2016-08-31 国网甘肃省电力公司电力科学研究院 Large-scale photovoltaic power station reactive voltage sequential coordination control technology

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104579165A (en) * 2015-01-22 2015-04-29 国家电网公司 Photovoltaic power station dynamic reactive response performance site testing method
CN105140964A (en) * 2015-09-24 2015-12-09 中国南方电网有限责任公司 10kV power distribution network power coordination control method with photovoltaic power supply
CN105914797A (en) * 2015-12-24 2016-08-31 国网甘肃省电力公司电力科学研究院 Large-scale photovoltaic power station reactive voltage sequential coordination control technology

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