CN106712041B - 220kV collects the step voltage control method for coordinating up and down of substation - Google Patents
220kV collects the step voltage control method for coordinating up and down of substation Download PDFInfo
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- CN106712041B CN106712041B CN201611150190.0A CN201611150190A CN106712041B CN 106712041 B CN106712041 B CN 106712041B CN 201611150190 A CN201611150190 A CN 201611150190A CN 106712041 B CN106712041 B CN 106712041B
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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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- 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
The present invention provides a kind of 220kV step voltage control method for coordinating up and down for collecting substation, comprising: obtains the current voltage value that i-th 220kV in area power grid collects the 110kV collection bus of substation, judges whether out-of-limit；If out-of-limit, calculate i-th 220kV collect substation 110kV collection bus institute band whole junior 110kV renewable energy stations to the voltage regulation capability of 110kV collection bus；Whether enough assess voltage regulation capability；If voltage regulation capability is enough, the voltage of 110kV collection bus is adjusted using junior 110kV renewable energy station；If voltage regulation capability is insufficient, the voltage of 110kV collection bus is adjusted using the reactive apparatus supplement that i-th 220kV collects substation.The method of the present invention can give full play to the Reactive-power control ability of renewable energy source station itself, avoid excessive capacitor or reactor cause to generate it is excessive idle.
Description
Technical field
The present invention relates to renewable energy collection region voltage control technology fields more particularly to a kind of 220kV to collect change
The step voltage control method for coordinating up and down in power station.
Background technique
In recent years, it is influenced by global warming and energy crisis, the importance of clean energy resource is increasingly prominent, apoplexy
The renewable energy such as power power generation and photovoltaic power generation are due to its huge potentiality to be exploited and the development technique of relative maturity, by generation
The extensive concern of various countries, boundary, and grow rapidly with a kind of unprecedented speed.
China to renewable energy take be extensive centralization development mode, as shown in Figure 1, at present China can
Regenerated energy source station is all that several stations 110kV are linked into power grid by a 220kV substation, this 220kV substation is known as converging
Collection station, the 110kV renewable energy source station for collecting station and following band are known as a new energy collection region.Since renewable energy is solid
The intermittent feature having, extensive renewable energy is grid-connected to bring great challenge to operation of power networks scheduling.It again because can be again
The raw energy and web area often lack local load, and the electric energy that renewable energy issues is needed by voltage levels, long transmission of electricity
Route, send load center afield, and these renewable energy transfer passages often lack conventional extreme misery power plant carry out it is active,
Idle support, system short circuit capacity is smaller, this variation for resulting in renewable energy source capability can cause biggish voltage fluctuation,
Voltage fluctuation in 110kV collection bus especially as shown in Figure 1 even will cause extensive chain off-grid when serious.
In the prior art, in order to avoid the voltage fluctuation in 110kV collection bus, often in ground state by collecting
Multiple capacitors or reactor is arranged in substation, and 110kV collection bus voltage is adjusted by the switching of capacitor or reactor,
But excessive capacitor or reactor will lead to a large amount of superfluous reactive power of generation.
Summary of the invention
In order to overcome the problems, such as present in the relevant technologies, it is electric that the present invention provides a kind of the superior and the subordinate that 220kV collects substation
Control method for coordinating is pressed, by preferentially adjusting 110kV bus using the Reactive-power control ability of junior'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 junior's renewable energy station itself
Reactive-power control scarce capacity when, just by switching higher level 220kV collect station in capacitor, reactor, guarantee renewable energy
Source station collection bus voltage is in N-1 security domain.Such step voltage control method for coordinating up and down can give full play in ground state
The Reactive-power control ability of renewable energy source station itself replaces static capacitors or reactor to play voltage support effect, avoids
Excessive capacitor or reactor cause to generate during fault disturbance excessive idle under ground state.
According to an aspect of an embodiment of the present invention, it provides a kind of 220kV and collects the step voltage up and down of substation and coordinate
Control method, which is characterized in that 220kV collects substation and connects junior 110kV renewable energy field by 110kV collection bus
Stand, the method includes executing following steps when controlling period arrival: step S1 obtains i-th 220kV in area power grid and converges
The current voltage value for collecting the 110kV collection bus of substation, judges whether the current voltage value is in control upper and lower limits
Interior, wherein i is natural number, and 220kV collects the sum of substation in 1≤i≤area power grid；Step S2, if the current electricity
Pressure value is within the control upper and lower limits, then makes i=i+1, return to step S1；Step S3, if described current
Voltage value exceeds the control upper and lower limits, calculates the 110kV collection bus institute band that i-th 220kV collects substation
Whole junior 110kV renewable energy stations to the voltage regulation capability of 110kV collection bus；Step S4 is assessed under whole
Whether the voltage regulation capability of grade 110kV renewable energy station is enough adjusted the voltage of corresponding 110kV collection bus to institute
It states in control upper and lower limits；Step S5, if the voltage regulation capability of whole junior 110kV renewable energy station enough will
The voltage of 110kV collection bus is adjusted into the control upper and lower limits, then utilizes junior 110kV renewable energy station tune
Save the voltage of 110kV collection bus；Step S6, if the voltage regulation capability of whole junior 110kV renewable energy station is not
Be enough to adjust the voltage of 110kV collection bus into the control upper and lower limits, then it can in addition to using whole junior 110kV
Renewable sources of energy station is adjusted except the voltage of 110kV collection bus, also collects the idle of substation using i-th 220kV
Equipment supplement adjusts the voltage of 110kV collection bus；Step S7 makes i=i+1, executes step S1.
Preferably, the step S1 includes:
Step S11, obtain in real time i-th 220kV collect substation 110kV collection bus current voltage value and
Control upper lower limit value, wherein current voltage value is denoted 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 voltage Vi curWhether in control upper and lower limits:
Vi min+Vi dead< Vi cur< Vi max-Vi dead (1)
Wherein, Vi deadDead zone threshold value is determined for 110kV collection bus voltage out-of-limit；
If formula (1) is set up, it is determined that the 110kV collection bus voltage that i-th 220kV collects substation is in control
Within upper and lower limits processed；If above formula is invalid, it is determined that i-th 220kV collects the 110kV collection bus of substation
Voltage is beyond control upper and lower limits.
Preferably, step S3 includes:
Step S31, i-th 220kV described in real-time reception collect the jZuo junior 110kV renewable energy in substation
Sent on station increase it is idle and can subtract it is idle, and according to the idle to corresponding of jZuo junior 110kV renewable energy station
The voltage sensibility of 110kV collection bus calculates jZuo junior 110kV renewable energy station and collects mother to corresponding 110kV
The voltage of line increases regulating powerRegulating power is reduced with voltage
WhereinIt is renewable to collect the jZuo junior 110kV in substation for i-th 220kV
Sent on energy station is real-time increase it is idle and can subtract it is idle,For the jZuo junior 110kV renewable energy station
The idle sensitivity to 110kV collection bus up voltage,For the nothing of the jZuo junior 110kV renewable energy station
Sensitivity of the function to 110kV collection bus drop voltage, j is natural number, and 1≤j≤the i-th 220kV collects junior in substation
The sum of 110kV renewable energy station；
Step S32, makes j=j+1, returns to step S31；
I-th 220kV is collected whole junior 110kV renewable energy stations pair of substation by step S33
The voltage regulation capability of 110kV collection bus is cumulative, show that i-th 220kV collects the 110kV collection bus institute of substation
Voltage regulation capability of the whole junior 110kV renewable energy stations of band to 110kV collection bus:
Preferably, step S4 includes:
Step S41 assesses i-th 220kV and collects whole junior 110kV renewable energy station pair in substation
Whether the voltage of 110kV collection bus reduces regulating power sufficient:
IfThen i-th 220kV has collected in substation 110kV collection bus or has connect
The upper limit closely is crossed, needs to be depressured, then judges whether following equation is true:
Vi max-Vi cur< Vi Down (4)
If formula (4) is set up, determine that i-th 220kV collects whole junior 110kV renewable energies of substation's band
Source station voltage reduces regulating power deficiency, and the reactive apparatus for needing i-th 220kV to collect substation coordinates decompression,
Wherein: Vi deadThreshold value, V are determined for 110kV collection bus voltage out-of-limiti curIt is currently electric for 110kV collection bus
Pressure value, Vi maxFor 110kV collection bus voltage upper control limit value, Vi DownCollect in substation all for i-th 220kV
Regulating power is reduced 110kV renewable energy station to the voltage of 110kV collection bus；
Step S42 assesses i-th 220kV and collects whole junior 110kV renewable energy station pair in substation
Whether the voltage of 110kV collection bus increases regulating power sufficient:
IfThen i-th 220kV has collected in substation 110kV collection bus or has connect
Lower limit closely is crossed, needs to boost, then judges whether following equation is true:
Vi min-Vi cur> Vi Up (5)
If formula (5) is set up, determine that i-th 220kV collects whole junior 110kV renewable energies of substation's band
Source station voltage increases regulating power deficiency, and the reactive apparatus for needing i-th 220kV to collect substation coordinates boosting,
Wherein: Vi deadThreshold value, V are determined for 110kV collection bus voltage out-of-limiti curIt is currently electric for 110kV collection bus
Pressure value, Vi minFor 110kV collection bus voltage lower control limit value, Vi UpCollect in substation all for i-th 220kV
110kV renewable energy station increases regulating power to the voltage of 110kV collection bus.
Preferably, step S6 includes:
Step S61, if step S41 determines that the reactive apparatus for needing i-th 220kV to collect substation coordinates drop
Pressure, then: if i-th 220kV collects the capacitor that transforming plant main transformer low-pressure side has operation, cutting off a reactor；
Otherwise a reactor is put into；
Step S62, if step S42 determines that the reactive apparatus for needing i-th 220kV to collect substation is coordinated to rise
Pressure, then: if i-th 220kV collects the reactor that transforming plant main transformer low-pressure side has operation, cutting off a reactor；
Otherwise a capacitor is put into.
Preferably, the junior 110kV renewable energy station is wind power station or photo-voltaic power generation station.
It preferably, was a control period every 5 minutes.
As described above, the present invention provides the step voltage control method for coordinating up and down that a kind of 220kV collects substation, it is special
Sign is that 220kV collects substation and connects junior 110kV renewable energy station, the method packet by 110kV collection bus
Include and execute following steps when controlling period arrival: step S1 obtains i-th 220kV in area power grid and collects substation
The current voltage value of 110kV collection bus, judges whether the current voltage value is in control upper and lower limits, and wherein i is
Natural number, 220kV collects the sum of substation in 1≤i≤area power grid；Step S2, if the current voltage value is in institute
It states within control upper and lower limits, then makes i=i+1, return to step S1；Step S3, if the current voltage value exceeds
The control upper and lower limits calculate whole juniors that i-th 220kV collects the 110kV collection bus institute band of substation
Voltage regulation capability of the 110kV renewable energy station to 110kV collection bus；Step S4, assessment whole junior 110kV can be again
Whether the voltage regulation capability of raw energy station is enough adjusted the voltage of corresponding 110kV collection bus to the control bound
In range；Step S5, if 110kV is collected mother enough by the voltage regulation capability of whole junior 110kV renewable energy station
The voltage of line is adjusted into the control upper and lower limits, then adjusts 110kV using junior's 110kV renewable energy station and collect
The voltage of bus；Step S6, if the voltage regulation capability of whole junior 110kV renewable energy station is not enough to 110kV
The voltage of collection bus is adjusted into the control upper and lower limits, then in addition to utilizing whole junior 110kV renewable energy field
It stands except the voltage for adjusting 110kV collection bus, is also adjusted using the reactive apparatus supplement that i-th 220kV collects substation
Save the voltage of 110kV collection bus；Step S7 makes i=i+1, executes step S1.220kV of the invention collects the upper of substation
Subordinate voltage control method for coordinating is by preferentially adjusting 110kV using the Reactive-power control ability of junior'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
When Reactive-power control scarce capacity, capacitor, reactor in station are just collected by switching 220kV, guarantee that renewable energy source station is female
Line voltage is in N-1 security domain.Such step voltage control method for coordinating up and down can give full play to renewable energy in ground state
It stands itself Reactive-power control ability, replaces static capacitors or reactor to play voltage support effect, avoid excessive under ground state
Capacitor or reactor cause to generate during fault disturbance it is excessive idle.Therefore, the present invention realizes higher level
220kV collects the reactive voltage coordinated control of substation Yu junior 110kV renewable energy source station, when junior's 110kV renewable energy
When source station is to the voltage regulation capability deficiency of 110kV busbar voltage, guaranteed by switching substation capacitors, reactor renewable
Energy source station busbar voltage avoids renewable energy Voltage Drop from causing the chain off-grid in renewable energy station in N-1 security domain,
Improve Network Voltage Stability and quality of voltage.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without any creative labor, is also possible to obtain other drawings based on these drawings.
Fig. 1 is new energy collection region power grid architecture schematic diagram；
Fig. 2 is the process for the control method for coordinating of step voltage up and down that 220kV provided in an embodiment of the present invention collects substation
Schematic diagram.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
In general, area power grid new energy collection region, which generally includes a 220kV, collects substation and multiple junior 110kV
Renewable energy station, these juniors 110kV renewable energy station are collected substation by 220kV and are linked into power grid,
The 110kV collection bus that 220kV collects substation connects these juniors 110kV renewable energy station.In new energy pooling zone
In the voltage coordinated control in domain, in order to avoid there is the extensive chain off-grid as caused by voltage, should sufficiently it be sent out in ground state
The Reactive-power control ability of renewable energy source station itself is waved, to replace direct capacitance to play voltage support effect, is avoided under ground state
Excessive investment capacitor causes to generate during fault disturbance excessive idle.Therefore, in the present invention, renewable energy
The reactive voltage coordination principle stood and collect station substation is as follows:
1, the Reactive-power control ability of renewable energy source station is preferentially used under ground state.
When the renewable energy source station in new energy collection region has Reactive-power control ability, renewable energy is preferentially used
It stands itself Reactive-power control ability, collects the voltage limits of substation using plan limit value, so that renewable energy source station bus
Voltage is in N-1 security domain.
2, when the Reactive-power control scarce capacity of new energy collection region, using collect station in low-pressure side reactive apparatus into
Row new energy collection region voltage is adjusted.
When renewable energy source station Reactive-power control scarce capacity and cannot be in the N-1 security domain when, pass through switching 220kV
Collect capacitor, the reactor in station, guarantees renewable energy source station busbar voltage in N-1 security domain.
In order to realize that above-mentioned 220kV collects the reactive voltage coordinated control original of station and junior 110kV renewable energy station
Then, a kind of method that the present invention proposes and realizes coordinated control.As shown in Fig. 2, 220kV collects the step voltage up and down of substation
Control method for coordinating executes following steps when being included in control period (being a control period every 5 minutes) arrival:
Step S1 obtains the current voltage value that i-th 220kV in area power grid collects the 110kV collection bus of substation,
Judge whether current voltage value is in control upper and lower limits, wherein i is natural number, and 220kV converges in 1≤i≤area power grid
Collect the sum of substation.
Step S2 makes i=i+1, returns to step if current voltage value is within control upper and lower limits
S1, that is to say, that obtain the current voltage value that next 220kV collects the 110kV collection bus of substation.
Step S3, if current voltage value calculates i-th 220kV and collect substation beyond control upper and lower limits
Voltage regulation capability of the whole junior 110kV renewable energy stations of 110kV collection bus institute band to 110kV collection bus.
Step S4, whether the voltage regulation capability for assessing whole junior 110kV renewable energy station enough will be corresponding
The voltage of 110kV collection bus is adjusted into control upper and lower limits.
Step S5, if 110kV is collected mother enough by the voltage regulation capability of whole junior 110kV renewable energy station
The voltage of line is adjusted into control upper and lower limits, then adjusts 110kV collection bus using junior 110kV renewable energy station
Voltage.
Step S6, if the voltage regulation capability of whole junior 110kV renewable energy station is not enough to collect 110kV
The voltage of bus is adjusted into the control upper and lower limits, then in addition to utilizing whole junior 110kV renewable energy station tune
Except the voltage for saving 110kV collection bus, also adjusted using the reactive apparatus supplement that i-th 220kV collects substation
The voltage of 110kV collection bus.
Step S7 makes i=i+1, executes step S1.That is, collecting substation to next 220kV carries out voltage association
Regulation system.
According to an embodiment of the invention, junior's 110kV renewable energy station can be wind power station or photovoltaic power generation
It stands.
According to one embodiment of present invention, above-mentioned steps S1 can specifically include:
Step S11, obtain in real time i-th 220kV collect substation 110kV collection bus current voltage value and
Upper and lower limits are controlled, wherein current voltage value is denoted 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 voltage Vi curWhether in control upper and lower limits:
Vi min+Vi dead< Vi cur< Vi max-Vi dead (1)
Wherein, Vi deadDead zone threshold value is determined for 110kV collection bus voltage out-of-limit.
If formula (1) is set up, it is determined that the 110kV collection bus voltage that i-th 220kV collects substation is in control
Within upper and lower limits processed；If above formula is invalid, it is determined that i-th 220kV collects the 110kV collection bus of substation
Voltage is beyond control upper and lower limits.
According to one embodiment of present invention, above-mentioned steps S3 can specifically include:
Step S31, i-th 220kV described in real-time reception collect the jZuo junior 110kV renewable energy in substation
Sent on station increase it is idle and can subtract it is idle, and according to the idle to corresponding of jZuo junior 110kV renewable energy station
The voltage sensibility of 110kV collection bus calculates jZuo junior 110kV renewable energy station and collects mother to corresponding 110kV
The voltage of line increases regulating powerRegulating power is reduced with voltage
WhereinIt is renewable to collect the jZuo junior 110kV in substation for i-th 220kV
Sent on energy station is real-time increase it is idle and can subtract it is idle,For the jZuo junior 110kV renewable energy station
The idle sensitivity to 110kV collection bus up voltage,For the nothing of the jZuo junior 110kV renewable energy station
Sensitivity of the function to 110kV collection bus drop voltage, j is natural number, and 1≤j≤the i-th 220kV collects junior in substation
The sum of 110kV renewable energy station.
Step S32, makes j=j+1, returns to step S31.Collect in substation that is, receiving i-th 220kV
Next junior's 110kV renewable energy station increases idle and can subtract idle.
I-th 220kV is collected whole junior 110kV renewable energy stations pair of substation by step S33
The voltage regulation capability of 110kV collection bus is cumulative, show that i-th 220kV collects the 110kV collection bus institute of substation
Voltage regulation capability of the whole junior 110kV renewable energy 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 junior 110kV renewable energy station pair in substation
Whether the voltage of 110kV collection bus reduces regulating power sufficient:
IfThen i-th 220kV has collected in substation 110kV collection bus or has connect
The upper limit closely is crossed, needs to be depressured, then judges whether following equation is true:
Vi max-Vi cur< Vi Down (4)
If formula (4) is set up, determine that i-th 220kV collects whole junior 110kV renewable energies of substation's band
Source station voltage reduces regulating power deficiency, and the reactive apparatus for needing i-th 220kV to collect substation coordinates decompression,
Wherein: Vi deadThreshold value, V are determined for 110kV collection bus voltage out-of-limiti curIt is currently electric for 110kV collection bus
Pressure value, Vi maxFor 110kV collection bus voltage upper control limit value, Vi DownCollect in substation all for i-th 220kV
Regulating power is reduced 110kV renewable energy station to the voltage of 110kV collection bus.
Step S42 assesses i-th 220kV and collects whole junior 110kV renewable energy station pair in substation
Whether the voltage of 110kV collection bus increases regulating power sufficient:
If Vi cur< Vi min+Vi dead, then i-th 220kV has collected in substation 110kV collection bus or has connect
Lower limit closely is crossed, needs to boost, then judges whether following equation is true:
Vi min-Vi cur> Vi Up (5)
If formula (5) is set up, determine that i-th 220kV collects whole junior 110kV renewable energies of substation's band
Source station voltage increases regulating power deficiency, and the reactive apparatus for needing i-th 220kV to collect substation coordinates boosting,
Wherein: Vi deadThreshold value, V are determined for 110kV collection bus voltage out-of-limiti curIt is currently electric for 110kV collection bus
Pressure value, Vi minFor 110kV collection bus voltage lower control limit value, Vi UpCollect in substation all for i-th 220kV
110kV renewable energy 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 determines that the reactive apparatus for needing i-th 220kV to collect substation coordinates drop
Pressure, then: if i-th 220kV collects the capacitor that transforming plant main transformer low-pressure side has operation, cutting off a capacitor；
Otherwise a reactor is put into.
Step S62, if step S42 determines that the reactive apparatus for needing i-th 220kV to collect substation is coordinated to rise
Pressure, then: if i-th 220kV collects the reactor that transforming plant main transformer low-pressure side has operation, cutting off a reactor；
Otherwise a capacitor is put into.
It illustrates below with reference to Fig. 1 and describes the step voltage control method for coordinating up and down that 220kV of the invention collects substation.
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 substation and three junior 110kV wind power station B, 110kV wind power station C and 110kV photovoltaic station D including a 220kV, this three
A junior 110kV renewable energy station is collected substation by 220kV and is linked into power grid, and 220kV collects substation
110kV collection bus connects these three juniors 110kV renewable energy station.SVC is equipped in each renewable energy station
(Static Var Compensator, Static Var Compensator).
For area power grid shown in FIG. 1,220kV of the invention collects station and junior 110kV renewable energy station
Voltage control method for coordinating then, to execute following steps in the control period (being a control period every 5 minutes):
Wherein, 220kV collect station 110kV collection bus current voltage be 117.62kV, upper control limit value is
117.50kV, lower control limit value are 110.70kV, and this method presets control cycle T, specifically comprises the following steps:
Carry out interim, execution following steps in each control cycle T (every 5 minutes are a control period):
1) check that the 220kV of i-th renewable energy station in area power grid collects the electricity of the 110kV collection bus in station
Situation is pressed, following calculate is executed:
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 denoted 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 voltage Vi curWhether in control upper and lower limits:
Due to Vi cur>Vi max-Vi dead, the 110kV collection bus voltage of 110kV renewable energy station got over the upper limit, into
Enter next step 2)；
2) the junior's 110kV renewable energy station for collecting the 110kV collection bus institute band at station to 220kV executes following meter
It calculates:
That 2-1) send 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, calculates the renewable sources of energy station and 110kV is collected
The voltage of bus increases and decreases regulating power.
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) it assesses 220kV and collects interior renewable energy station of standing to the voltage adjusting energy for collecting interior 110kV collection bus of standing
Power, the 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) it is renewable in station then to determine that 220kV collects
The voltage of energy station reduces regulating power deficiency, needs to coordinate to be depressured.
4) assessment result for collecting the renewable sources of energy station voltage regulation capability in station to 220kV according to step 3), calculates
220kV collects the reactive apparatus switching strategy of substation.
4-1) pass through 3-1) determine that current needs coordinate decompression, if 220kV collects the electricity that station owner's low pressure side has operation
Container then cuts off a capacitor；Otherwise a reactor is put into.
5) return step 1), the 220kV for continuing with next renewable sources of energy station collects substation, until complete in power grid
The 220kV of portion renewable sources of energy station, which collects substation's processing, to be completed.
In conclusion 220kV of the invention collects the control method for coordinating of step voltage up and down of substation by preferentially utilizing
The Reactive-power control ability of junior's renewable energy source station itself adjusts the voltage of 110kV bus, 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 pass through switching
220kV collects capacitor, reactor in station, guarantees renewable energy source station busbar voltage in N-1 security domain.Above and below such
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, replace static
Capacitor or reactor play voltage support effect, and capacitor or reactor excessive under ground state is avoided to cause in fault disturbance
It generates in the process excessive idle.Therefore, the present invention realizes that higher level 220kV collects substation and junior 110kV is renewable
The reactive voltage coordinated control of energy source station is preferentially adjusted using the Reactive-power control ability of junior's renewable energy source station itself
The voltage of 110kV collection bus, when junior's 110kV renewable energy source station is to the voltage regulation capability of 110kV collection bus voltage
When insufficient, guarantee renewable energy source station collection bus voltage in N-1 security domain by switching higher level substation capacitors, reactor
In, it avoids renewable energy station Voltage Drop from causing the chain off-grid in renewable energy station, improves Network Voltage Stability
And quality of voltage.
Those skilled in the art will readily occur to of the invention its after considering specification and the disclosure invented here of practice
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (6)
1. the step voltage control method for coordinating up and down that a kind of 220kV collects substation, which is characterized in that 220kV collects substation
Junior 110kV renewable energy station is connected by 110kV collection bus, the method includes executing when controlling period arrival
Following steps:
Step S1 obtains the current voltage value that i-th 220kV in area power grid collects the 110kV collection bus of substation, judgement
Whether the current voltage value is in control upper and lower limits, and wherein i is natural number, and 220kV converges in 1≤i≤area power grid
Collect the sum of substation；
Step S2 makes i=i+1 if the current voltage value is within the control upper and lower limits, and return executes step
Rapid S1；
Step S3 calculates i-th 220kV and collects change if the current voltage value exceeds the control upper and lower limits
Whole junior 110kV renewable energy stations of the 110kV collection bus institute band in power station adjust the voltage of 110kV collection bus
Ability, wherein the step S3 includes:
Step S31, i-th 220kV described in real-time reception collect the jZuo junior 110kV renewable energy station in substation
On send increase it is idle and can subtract it is idle, and according to the idle to corresponding of jZuo junior 110kV renewable energy station
The voltage sensibility of 110kV collection bus calculates jZuo junior 110kV renewable energy station and collects mother to corresponding 110kV
The voltage of line increases regulating powerRegulating power is reduced with voltage
WhereinCollect the jZuo junior 110kV renewable energy in substation for i-th 220kV
Sent on station is real-time increase it is idle and can subtract it is idle,For the idle of the jZuo junior 110kV renewable energy station
Sensitivity to 110kV collection bus up voltage,For the idle right of the jZuo junior 110kV renewable energy station
The sensitivity of voltage drops in 110kV collection bus, and j is natural number, and 1≤j≤the i-th 220kV collects in substation that junior 110kV can
The sum of renewable sources of energy station；
Step S32, makes j=j+1, returns to step S31；
Step S33 converges the whole junior 110kV renewable energy stations for collecting substation i-th 220kV to 110kV
The voltage regulation capability for collecting bus is cumulative, show that i-th 220kV collects the complete of the 110kV collection bus institute band of substation
Voltage regulation capability of the subordinate grade 110kV renewable energy station to 110kV collection bus:
Whether step S4, the voltage regulation capability for assessing whole junior 110kV renewable energy station enough converge corresponding 110kV
The voltage for collecting bus is adjusted into the control upper and lower limits；
Step S5, if the voltage regulation capability of whole junior 110kV renewable energy station is enough by 110kV collection bus
Voltage is adjusted into the control upper and lower limits, then adjusts 110kV collection bus using junior 110kV renewable energy station
Voltage；
Step S6, if the voltage regulation capability of whole junior 110kV renewable energy station is not enough to 110kV collection bus
Voltage adjust in the control upper and lower limits, then in addition to utilizing whole junior 110kV renewable energy stations adjustings
Except the voltage of 110kV collection bus, 110kV also is adjusted using the reactive apparatus supplement that i-th 220kV collects substation
The voltage of collection bus；
Step S7 makes i=i+1, executes step S1.
2. the step voltage control method for coordinating up and down that 220kV according to claim 1 collects substation, which is characterized in that
The step S1 includes:
Step S11, obtain in real time i-th 220kV collect substation 110kV collection bus current voltage value and control
Upper lower limit value, wherein current voltage value is denoted asLower control limit value is denoted asUpper control limit value is denoted as
Step S12 checks 110kV collection bus current voltageWhether in control upper and lower limits:
Vi min+Vi dead< Vi cur< Vi max-Vi dead (1)
Wherein,Dead zone threshold value is determined for 110kV collection bus voltage out-of-limit；
If formula (1) is set up, it is determined that the 110kV collection bus voltage that i-th 220kV collects substation is in control
Within lower range；If above formula is invalid, it is determined that i-th 220kV collects the 110kV collection bus voltage of substation
Beyond control upper and lower limits.
3. the step voltage control method for coordinating up and down that 220kV according to claim 1 collects substation, which is characterized in that
Step S4 includes:
Step S41 assesses i-th 220kV and collects in substation whole junior 110kV renewable energy station to 110kV
Whether the voltage of collection bus reduces regulating power sufficient:
IfThen i-th 220kV collects in substation 110kV collection bus or close to more
The upper limit is crossed, needs to be depressured, then judges whether following equation is true:
Vi max-Vi cur< Vi Down (4)
If formula (4) is set up, determine that i-th 220kV collects whole junior 110kV renewable energy fields of substation's band
Voltage of standing reduces regulating power deficiency, and the reactive apparatus for needing i-th 220kV to collect substation coordinates decompression,
Wherein:Threshold value is determined for 110kV collection bus voltage out-of-limit,For 110kV collection bus current voltage value,For 110kV collection bus voltage upper control limit value,Collect whole juniors in substation for i-th 220kV
Regulating power is reduced 110kV renewable energy station to the voltage of 110kV collection bus；
Step S42 assesses i-th 220kV and collects in substation whole junior 110kV renewable energy station to 110kV
Whether the voltage of collection bus increases regulating power sufficient:
IfControl bus needs to boost, then whether judges following equation or close to more lower limit
It sets up:
If formula (5) is set up, determine that i-th 220kV collects whole junior 110kV renewable energy fields of substation's band
Voltage of standing increases regulating power deficiency, and the reactive apparatus for needing i-th 220kV to collect substation coordinates boosting,
Wherein:Threshold value is determined for 110kV collection bus voltage out-of-limit,For 110kV collection bus current voltage value,For 110kV collection bus voltage lower control limit value,Collect whole juniors in substation for i-th 220kV
110kV renewable energy station increases regulating power to the voltage of 110kV collection bus.
4. the step voltage control method for coordinating up and down that 220kV according to claim 1 collects substation, which is characterized in that
Step S6 includes:
Step S61, if step S41 determines that the reactive apparatus for needing i-th 220kV to collect substation coordinates decompression:
If i-th 220kV collects the capacitor that transforming plant main transformer low-pressure side has operation, a capacitor is cut off；Otherwise it throws
Enter a reactor；
Step S62, if step S42 determines that the reactive apparatus for needing i-th 220kV to collect substation coordinates boosting:
If i-th 220kV collects the reactor that transforming plant main transformer low-pressure side has operation, a reactor is cut off；Otherwise it throws
Enter a capacitor.
5. the step voltage control method for coordinating up and down that 220kV according to claim 1 collects substation, which is characterized in that
The junior 110kV renewable energy station is wind power station or photo-voltaic power generation station.
6. the step voltage control method for coordinating up and down that 220kV according to claim 1 collects substation, which is characterized in that
It was a control period every 5 minutes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| 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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