CN109103896A - A kind of automatic voltage control method and device - Google Patents
A kind of automatic voltage control method and device Download PDFInfo
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- CN109103896A CN109103896A CN201811051309.8A CN201811051309A CN109103896A CN 109103896 A CN109103896 A CN 109103896A CN 201811051309 A CN201811051309 A CN 201811051309A CN 109103896 A CN109103896 A CN 109103896A
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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 relates to a kind of automatic voltage control method and devices, grid entry point is when adjusting voltage needs to carry out reactive power adjusting, when needing to increase reactive power adjusting or reducing reactive power adjusting, in conjunction with the current idle power output state of the reactive power compensator of detection, idle power output by preferentially discharging reactive power compensator realizes the adjusting for increaseing or decreasing reactive power, it avoids and first adjusts inverter, it contributes further through inverter displacement SVC/SVG and adjusts repeatedly later, reduce the action frequency that inverter is adjusted repeatedly, avoids network system fluctuation.
Description
Technical field
The invention belongs to the voltage and reactive power automatic control fields of new energy power station, and in particular to a kind of automatism voltage control side
Method and device.
Background technique
Automatism voltage control (Automatic Voltage Control, AVC) is electric power system dispatching department or new energy
Power station operator passes through the real-time monitoring and analytical calculation to operation of power networks parameter, auto-control Reactive-power control equipment, thus real
The existing secondary frequency of electric system and voltage control.The control target of AVC system is to meet network-wide security voltage constraint condition
Under the premise of realize optimization to reactive power flow in region, the reactive power to reach new energy station is controllable, voltage is high-quality, subtracts
The multiple targets such as few network loss.
In the prior art, notification number CN104901319B, entitled " a kind of photovoltaic plant AVC control method " China
Patent describes current photovoltaic plant automatic voltage control method in the background technique of specification, points out in method, photovoltaic
After AVC system of standing receives the grid entry point busbar voltage instruction that main website of control centre issues, the combination of the substation AVC is when interior operation of setting out in advance to make arrangements
Operating condition calculates voltage required idle amount up to standard, and according to inverter, the reactive power compensators such as preferential, SVC or SVG take second place suitable
Sequence carries out the adjusting of idle power output, each inverter is distributed in Reactive-power control instruction according to existing control strategy, when inverter
It when idle power output is not able to satisfy regulating and controlling voltage requirement, then issues Reactive-power control and instructs to reactive-load compensation equipment, keep photovoltaic plant female
Line voltage maintains the voltage instruction value that control centre is assigned.
And according to national standard Q_GDW 619-2011 area power grid automatism voltage control (AVC) technical specification and more provinces pair
In the associated specifications of automatic voltage control system, for the adjusting sequence of inverter and SVG, it is desirable that as follows: steady in power grid
In the case of state, the Reactive-power control ability of inverter is made full use of to adjust voltage, when inverter Reactive-power control scarce capacity, examined
Consider the Reactive-power control of SVC/SVG device.On the basis of guaranteeing that voltage is qualified, SVC/SVG device can reserve reasonable dynamic reactive
Deposit.After power grid restores normal from failure, substation passes through the idle power output for adjusting inverter, by SVC, SVG device
The idle of investment cements out, and sets it and reserves reasonable dynamic reactive deposit.
According to above-mentioned specification, in AVC adjustment process, if strict implement scheduling requirement " inverter is first adjusted, it is rear to adjust
SVC/SVG, then adjust inverter displace SVC, SVG device it is idle " strategy execution sequence, may cause the anti-of inverter
Polyphony section, increases action frequency, delays actuation time, cause in photovoltaic plant or new energy power station for inverter,
The control of SVC/SVG generally occur within it is some adjust repeatedly, increase the action frequency of equipment, in some instances it may even be possible to cause the wave of system
It is dynamic.
Summary of the invention
The object of the present invention is to provide a kind of automatic voltage control method and devices, for solving prior art automatic voltage
There is inverter and adjusts the problem of causing system fluctuation repeatedly in control method.
In order to solve the above technical problems, the present invention proposes a kind of automatic voltage control method, including following methods scheme:
Method scheme one, includes the following steps:
1) target voltage values for obtaining grid entry point calculate the current voltage of grid entry point in conjunction with the current operating condition in power station
The increase regulated quantity of reactive power or reduction regulated quantity when reaching the target voltage values；
2) the current idle power output of reactive power compensator is detected；When the direction of the current idle power output of reactive power compensator is
Reactive power is issued, the current voltage of < grid entry point reaches the target voltage values and needs to carry out the idle of the reduction regulated quantity
When adjusting, the idle power output by discharging reactive power compensator realizes the Reactive-power control for reducing regulated quantity；
When the direction of the current idle power output of reactive power compensator is absorbing reactive power, the current voltage of < grid entry point reaches
When needing to carry out the Reactive-power control for increasing regulated quantity to the target voltage values, pass through the idle of release reactive power compensator
Power output realizes the Reactive-power control for increasing regulated quantity.
Method scheme two, on the basis of method scheme one, after the idle power output for controlling the release reactive power compensator
For the idle power output of reactive power compensator not in setting range, the setting range is that reactive power compensator carries out reactive power adjusting
Dead zone range.
Method scheme three, four, respectively on the basis of method scheme one, two, when the whole reactive power compensator of release
Idle undercapacity calculates the residual accommodation of reactive power to realize the increase regulated quantity of the reactive power or reduce regulated quantity
Amount realizes the adjusting of the residual accommodation amount of reactive power by adjusting the idle power output of inverter.
Method scheme five, six, respectively on the basis of method scheme three, four, it is described by adjust inverter it is idle go out
Power realizes that the condition of the adjusting of the residual accommodation amount of reactive power includes:
The current voltage of grid entry point reach the target voltage values need to carry out it is described reduce regulated quantity Reactive-power control when,
Inverter can reduce reactive power, and < inverter needs reduced reactive power greater than the voltage power-less sensitivity of inverter；
The current voltage of grid entry point reach the target voltage values need to carry out it is described increase regulated quantity Reactive-power control when,
Inverter can increase reactive power, and < inverter needs voltage power-less sensitivity of the increased reactive power greater than inverter.
Method scheme seven, eight, respectively on the basis of method scheme three, four, when the idle undercapacity of inverter is with reality
When the adjusting of the residual accommodation amount of existing reactive power, by adjusting the idle power output of reactive power compensator, reactive power is realized
The adjusting of residual accommodation amount.
Method scheme nine, ten, it is described by adjusting reactive power compensator respectively on the basis of method scheme seven, eight
Idle power output realizes that the condition of the adjusting of the residual accommodation amount of reactive power includes:
The current voltage of grid entry point reach the target voltage values need to carry out it is described reduce regulated quantity Reactive-power control when,
Reactive power compensator can reduce reactive power, and < reactive power compensator needs reduced reactive power to be greater than reactive power compensator
Voltage power-less sensitivity；
The current voltage of grid entry point reach the target voltage values need to carry out it is described increase regulated quantity Reactive-power control when,
Reactive power compensator can increase reactive power, and < reactive power compensator needs increased reactive power to be greater than reactive power compensator
Voltage power-less sensitivity.
Method scheme 11,12, respectively on the basis of method scheme three, four, when the idle undercapacity of inverter
When the adjusting of residual accommodation amount to realize reactive power, calculates and realize the residual accommodation amount by adjusting reactive power compensator
Adjusting idle power output, when be calculated adjust reactive power compensator idle power output need change power output direction when, out
The direction of power includes issuing reactive power, absorbing reactive power, < when determining to need to adjust the idle power output of reactive power compensator not
When leading to control bus voltage out-of-limit, the residue is realized by the idle power output that adjusting reactive power compensator is calculated
The adjusting of regulated quantity.
In order to solve the above technical problems, the present invention also proposes a kind of automatism voltage control device, including following device scheme:
Device scheme one, including processor, for realizing the instruction of following steps:
1) target voltage values for obtaining grid entry point calculate the current voltage of grid entry point in conjunction with the current operating condition in power station
The increase regulated quantity of reactive power or reduction regulated quantity when reaching the target voltage values；
2) the current idle power output of reactive power compensator is detected；When the direction of the current idle power output of reactive power compensator is
Reactive power is issued, the current voltage of < grid entry point reaches the target voltage values and needs to carry out the idle of the reduction regulated quantity
When adjusting, the idle power output by discharging reactive power compensator realizes the Reactive-power control for reducing regulated quantity；
When the direction of the current idle power output of reactive power compensator is absorbing reactive power, the current voltage of < grid entry point reaches
When needing to carry out the Reactive-power control for increasing regulated quantity to the target voltage values, pass through the idle of release reactive power compensator
Power output realizes the Reactive-power control for increasing regulated quantity.
Device scheme two, on the basis of device scheme one, after the idle power output for controlling the release reactive power compensator
For the idle power output of reactive power compensator not in setting range, the setting range is that reactive power compensator carries out reactive power adjusting
Dead zone range.
Device scheme three, four, respectively on the basis of device scheme one, two, when the whole reactive power compensator of release
Idle undercapacity calculates the residual accommodation of reactive power to realize the increase regulated quantity of the reactive power or reduce regulated quantity
Amount realizes the adjusting of the residual accommodation amount of reactive power by adjusting the idle power output of inverter.
Device scheme five, six, respectively on the basis of device scheme three, four, it is described by adjust inverter it is idle go out
Power realizes that the condition of the adjusting of the residual accommodation amount of reactive power includes:
The current voltage of grid entry point reach the target voltage values need to carry out it is described reduce regulated quantity Reactive-power control when,
Inverter can reduce reactive power, and < inverter needs reduced reactive power greater than the voltage power-less sensitivity of inverter；
The current voltage of grid entry point reach the target voltage values need to carry out it is described increase regulated quantity Reactive-power control when,
Inverter can increase reactive power, and < inverter needs voltage power-less sensitivity of the increased reactive power greater than inverter.
Device scheme seven, eight, respectively on the basis of device scheme three, four, when the idle undercapacity of inverter is with reality
When the adjusting of the residual accommodation amount of existing reactive power, by adjusting the idle power output of reactive power compensator, reactive power is realized
The adjusting of residual accommodation amount.
Device scheme nine, ten, it is described by adjusting reactive power compensator respectively on the basis of device scheme seven, eight
Idle power output realizes that the condition of the adjusting of the residual accommodation amount of reactive power includes:
The current voltage of grid entry point reach the target voltage values need to carry out it is described reduce regulated quantity Reactive-power control when,
Reactive power compensator can reduce reactive power, and < reactive power compensator needs reduced reactive power to be greater than reactive power compensator
Voltage power-less sensitivity；
The current voltage of grid entry point reach the target voltage values need to carry out it is described increase regulated quantity Reactive-power control when,
Reactive power compensator can increase reactive power, and < reactive power compensator needs increased reactive power to be greater than reactive power compensator
Voltage power-less sensitivity.
Device scheme 11,12, respectively on the basis of device scheme three, four, when the idle undercapacity of inverter
When the adjusting of residual accommodation amount to realize reactive power, calculates and realize the residual accommodation amount by adjusting reactive power compensator
Adjusting idle power output, when be calculated adjust reactive power compensator idle power output need change power output direction when, out
The direction of power includes issuing reactive power, absorbing reactive power, < when determining to need to adjust the idle power output of reactive power compensator not
When leading to control bus voltage out-of-limit, the residue is realized by the idle power output that adjusting reactive power compensator is calculated
The adjusting of regulated quantity.
The beneficial effects of the present invention are:
The present invention when adjusting voltage needs to carry out reactive power adjusting, that is, needs to increase reactive power adjusting in grid entry point
Or when reducing reactive power adjusting, in conjunction with the current idle power output state of the reactive power compensator of detection, by preferentially discharging nothing
The idle power output of Reactive power compensation installations realizes the adjusting for increaseing or decreasing reactive power, avoids and first adjusts inverter, again logical later
Cross inverter displacement SVC/SVG power output and caused by adjust repeatedly, reduce the action frequency that inverter is adjusted repeatedly, avoid
Network system fluctuation.
If all the idle power output of release reactive power compensator cannot still reach the regulated quantity for needing to adjust reactive power,
The sequence that preferential, reactive power compensator takes second place using inverter in the prior art again carries out the adjusting of idle power output.
Detailed description of the invention
Fig. 1 is a kind of automatic voltage control method flow chart of the invention；
Fig. 2 is a kind of idle method of replacing flow chart of reactive power compensator.
Specific embodiment
A specific embodiment of the invention is further described with reference to the accompanying drawing.
A kind of automatic voltage control method proposed by the present invention, comprising the following steps:
The target voltage values of grid entry point are obtained, in conjunction with the current operating condition in power station, the current voltage for calculating grid entry point reaches
First regulated quantity of reactive power when to target voltage values.
It is then detected that the current idle power output of reactive power compensator；When the side of the current idle power output of reactive power compensator
To issue reactive power, the < the first regulated quantity is when reducing the regulated quantity of the first regulated quantity on the basis of current reactive power,
Idle power output by discharging reactive power compensator realizes the adjusting of the regulated quantity of reactive power.
When the direction of the current idle power output of reactive power compensator is absorbing reactive power, the < the first regulated quantity is current
When increasing the regulated quantity of the first regulated quantity on the basis of reactive power, the idle power output by discharging reactive power compensator realizes nothing
The adjusting of the regulated quantity of function power.
The present invention when adjusting voltage needs to carry out reactive power adjusting, that is, needs to increase reactive power adjusting in grid entry point
Or when reducing reactive power adjusting, in conjunction with the current idle power output state of the reactive power compensator of detection, by preferentially discharging nothing
The idle power output of Reactive power compensation installations realizes the adjusting for increaseing or decreasing reactive power, avoids and first adjusts inverter, again logical later
It crosses inverter displacement SVC/SVG power output and adjusts repeatedly, reduce the action frequency that inverter is adjusted repeatedly, avoid power grid system
System fluctuation.
The adjusting of the first regulated quantity of reactive power is realized when the idle undercapacity for discharging whole reactive power compensators
When, the residual accommodation amount of reactive power is calculated, realizes idle function by adjusting the idle power output of inverter for the second regulated quantity
The adjusting of second regulated quantity of rate.The reactive power of the second regulated quantity is subtracted in above-mentioned first regulated quantity via the whole nothings of release
The idle power output of Reactive power compensation installations is adjusted.
First regulated quantity of the invention is needle when reducing the regulated quantity of the first regulated quantity on the basis of current reactive power
It the case where to above-mentioned second regulated quantity adjusting inverter idle power output, needs to judge whether inverter has and reduces reactive power
Ability, < inverter need whether reduced reactive power is greater than the voltage power-less sensitivity of inverter, if so, inverter into
The adjusting of the corresponding idle power output of row, to realize the adjusting of the second regulated quantity.
First regulated quantity of the invention is needle when increasing the regulated quantity of the first regulated quantity on the basis of current reactive power
It the case where to above-mentioned second regulated quantity adjusting inverter idle power output, needs to judge whether inverter has and increases reactive power
Ability, < inverter need whether increased reactive power is greater than the voltage power-less sensitivity of inverter, if so, inverter into
The adjusting of the corresponding idle power output of row, to realize the adjusting of the second regulated quantity.
In reactive power compensator release, all idle power output and inverter carry out idle power output adjusting to greatest extent
Afterwards, it if the adjusting for being still unable to satisfy the first regulated quantity requires, calculates residue of the inverter after carrying out idle power output and adjusting and adjusts
Section amount, i.e. third regulated quantity (regulated quantity is the idle power output that the second regulated quantity subtracts inverter), by adjusting reactive compensation
The idle power output of device realizes the adjusting of the residual accommodation amount of reactive power.
First regulated quantity of the invention is needle when reducing the regulated quantity of the first regulated quantity on the basis of current reactive power
It the case where to above-mentioned third regulated quantity adjusting reactive power compensator idle power output, needs to judge whether reactive power compensator has and subtracts
The ability of small reactive power, the voltage power-less that < reactive power compensator needs reduced reactive power whether to be greater than inverter are sensitive
Degree, if so, reactive power compensator carries out the adjusting of corresponding idle power output, to realize the adjusting of third regulated quantity.
Opposite, the first regulated quantity of the invention is to increase the adjusting of the first regulated quantity on the basis of current reactive power
When amount, the case where adjusting reactive power compensator idle power output for above-mentioned third regulated quantity, need to judge that reactive power compensator is
No to have the ability for increasing reactive power, < reactive power compensator needs whether increased reactive power is greater than the voltage of inverter
Idle sensitivity, if so, reactive power compensator carries out the adjusting of corresponding idle power output, to realize the adjusting of third regulated quantity.With
For SVG, automatic voltage control method of the invention is as shown in Figure 1.
The present invention cannot still reach in the idle power output of whole of release reactive power compensator (SVC and/or SVG) to be needed to adjust
When the regulated quantity of reactive power, then the sequence progress that preferential, reactive power compensator takes second place using inverter in the prior art is idle
The adjusting of power output.There are dead zone when adjusting idle power output due to reactive power compensator, i.e. the idle power output of reactive power compensator exists
Regulating command cannot be accurately executed when in dead zone range, therefore, the release reactive power compensator of this example meaning (SVC and/or
SVG power output that whole) is idle cannot be in dead zone range, i.e. reactive compensation after the idle power output of control release reactive power compensator
For the idle power output of device not in setting range, which is the dead zone model that reactive power compensator carries out reactive power adjusting
It encloses.
In view of the adjusting dead zone of reactive power compensator, the present invention reactive power compensator release all it is idle power output and
After inverter carries out idle power output adjusting to greatest extent, if the adjusting for being still unable to satisfy the first regulated quantity requires, calculate
When obtaining adjusting the direction of idle power output (third regulated quantity) the needs change power output of reactive power compensator, the direction of power output includes
Reactive power, absorbing reactive power are issued, i.e., absorbing reactive power is changed by sending reactive power, or by absorbing reactive power
Change into sending reactive power.And <, when the idle power output (third regulated quantity) that judgement needs to adjust reactive power compensator does not cause
When control bus voltage out-of-limit, the tune for adjusting the idle power output realization residual accommodation amount of reactive power compensator is calculated by this
Section.If it is determined that not executing the tune of the third regulated quantity then when the third regulated quantity calculated can result in control bus voltage out-of-limit
Section instruction.
Specifically, the present invention is by the coordinated control of the idle source device (inverter and SVC/SVG equipment) in photovoltaic plant
It is divided into three parts to realize:
(1) SVC/SVG dead zone protection
SVC/SVG equipment causes it that cannot accurately respond in a certain range near 0 value due to equipment of itself
Regulating command has certain adjusting dead zone, the present invention is handled the dead zone in terms of three:
Under any circumstance, the idle power output of SVC/SVG will not be all adjusted in dead zone range.
If the power output collection value of SVC/SVG is in dead zone range, the present invention will not be actively adjusted to outside dead zone；It is needed when having
When adjusting idle power output, and < the quantity that needs to adjust is greater than the distance that the current idle power output of SVC/SVG arrives deadband boundaries,
SVC/SVG can be recalled dead zone range.
When SVC/SVG power output adjusting need to change its contribute direction when (absorption/sending), SVC/SVG need a step across
Its dead zone is crossed, if the idle amount across adjusting needed for dead zone will lead to control bus voltage out-of-limit system, will not be exported of the invention
Control method.
(2) SVC/SVG optimisation strategy
In AVC adjustment process, if strict implement scheduling requirement " first adjusts inverter, adjusts the plan of SVC/SVG " afterwards
Sequence is slightly executed, the adjusting repeatedly of inverter is may cause, increases action frequency, delay actuation time.Therefore, in AVC
In adjustment process, when SVC/SVG is there are when idle power output, if the idle power output of SVC/SVG reduces direction, with strategy adjustment direction
When consistent, the idle power output of SVC/SVG can be preferentially discharged, guarantees that there are biggish nargin by SVC/SVG, meanwhile, it avoids and first adjusts
Save inverter, later further through inverter displacement SVC/SVG power output and caused by two useless adjustings.
(3) SVC/SVG Replacement Strategy
As shown in Fig. 2, SVC/SVG permutation function without strategy outlet when start automatically, when SVC/SVG equipment there is currently
For power output < power output when in deadband boundaries, whether anticipation inverter has surplus energy to replace its power output, and whether anticipation will cause between equipment
Unreasonable reactive power flow.Unreasonable trend between inverter and SVG refers to that inverter and SVG power output direction are inconsistent, i.e.,
Occur in a new energy power station stand in reactive circular power flow the case where, be in this way it is unreasonable, will increase loss.
When inverter has surplus energy displacement < judgement to be not in unreasonable trend, control inverter idle power output come
The power output of SVC/SVG is replaced, the displaced reactive power size of every wheel will not cause the fluctuation of power grid.
When inverter has surplus energy displacement, but judges to occur between inverter and SVC/SVG unreasonable trend, judgement is not
Whether reasonable trend is greater than the dead zone of SVC/SVG, replaces going out for SVC/SVG if more than the idle power output of, control inverter
Power, the displaced reactive power size of every wheel will not cause the fluctuation of power grid, unreasonable between inverter and SVC/SVG after displacement
Trend can be less than the dead zone of SVC/SVG, i.e., unreasonable trend minimizes.
Due to SVG equipment itself have drift, contribute near 0 when be it is unstable, for this disadvantage for evading SVG
End, SVG producer can provide the dead band value of equipment, the i.e. dead zone of SVC/SVG to control producer, be illustrated below:
The SVG that one capacity is 1Mvar, dead zone are about (- 80kvar ,+80kvar), i.e. the power output of the SVG can not
Between -80kvar to+80kvar.If SVG power output is+80kvar at this time, inverter power output is -100kvar, is not conformed to as
It manages trend 180kvar and is greater than dead zone 160kvar, strategy of the invention will start Replacement Strategy, SVG is made to be adjusted to -80kvar, and inverse
Become device and be adjusted to+60kvar, unreasonable trend is 140kvar after adjustment, is less than dead zone.
The invention also provides a kind of automatism voltage control devices, including processor, for realizing the instruction of following steps:
1) target voltage values for obtaining grid entry point calculate the current voltage of grid entry point in conjunction with the current operating condition in power station
The increase regulated quantity of reactive power or reduction regulated quantity when reaching target voltage values.
2) the current idle power output of reactive power compensator is detected；When the direction of the current idle power output of reactive power compensator is
Reactive power is issued, the current voltage of < grid entry point reaches target voltage values when carrying out reducing the Reactive-power control of regulated quantity, logical
The idle power output for crossing release reactive power compensator realizes the Reactive-power control for reducing regulated quantity.
When the direction of the current idle power output of reactive power compensator is absorbing reactive power, the current voltage of < grid entry point reaches
When carrying out increasing the Reactive-power control of regulated quantity to target voltage values, the idle power output by discharging reactive power compensator is realized
Increase the Reactive-power control of regulated quantity.
The automatism voltage control device of above-mentioned meaning, a kind of computer for being actually based on the method for the present invention process solve
Scheme, i.e., a kind of software architecture, can be applied in generation of electricity by new energy station, and above-mentioned apparatus is place corresponding with method flow
Reason process.Since sufficiently clear is complete for the introduction to the above method, therefore no longer it is described in detail.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (10)
1. a kind of automatic voltage control method, which comprises the following steps:
1) target voltage values of grid entry point are obtained, in conjunction with the current operating condition in power station, the current voltage for calculating grid entry point reaches
The increase regulated quantity of reactive power or reduction regulated quantity when the target voltage values；
2) the current idle power output of reactive power compensator is detected；When the direction of the current idle power output of reactive power compensator is to issue
Reactive power, and the current voltage of grid entry point reaches the target voltage values and needs to carry out the Reactive-power control for reducing regulated quantity
When, the idle power output by discharging reactive power compensator realizes the Reactive-power control for reducing regulated quantity；
When the direction of the current idle power output of reactive power compensator is absorbing reactive power, and the current voltage of grid entry point reaches institute
State target voltage values need to carry out it is described increase regulated quantity Reactive-power control when, pass through release reactive power compensator idle power output
Realize the Reactive-power control for increasing regulated quantity.
2. automatic voltage control method according to claim 1, which is characterized in that control the release reactive power compensator
Idle power output after reactive power compensator idle power output not in setting range, the setting range is that reactive power compensator carries out
The dead zone range that reactive power is adjusted.
3. automatic voltage control method according to claim 1 or 2, which is characterized in that when the whole reactive compensation of release
The idle undercapacity of device calculates the surplus of reactive power to realize the increase regulated quantity of the reactive power or reduce regulated quantity
Remaining regulated quantity realizes the adjusting of the residual accommodation amount of reactive power by adjusting the idle power output of inverter.
4. automatic voltage control method according to claim 3, which is characterized in that described by adjusting the idle of inverter
Power output, realizes that the condition of the adjusting of the residual accommodation amount of reactive power includes:
The current voltage of grid entry point reach the target voltage values need to carry out it is described reduce regulated quantity Reactive-power control when, inversion
Device can reduce reactive power, and inverter needs reduced reactive power greater than the voltage power-less sensitivity of inverter；
The current voltage of grid entry point reach the target voltage values need to carry out it is described increase regulated quantity Reactive-power control when, inversion
Device can increase reactive power, and inverter needs voltage power-less sensitivity of the increased reactive power greater than inverter.
5. automatic voltage control method according to claim 3, which is characterized in that when inverter idle undercapacity with
When realizing the adjusting of the residual accommodation amount of reactive power, by adjusting the idle power output of reactive power compensator, reactive power is realized
Residual accommodation amount adjusting.
6. automatic voltage control method according to claim 5, which is characterized in that described by adjusting reactive power compensator
Idle power output, realize that the condition of the adjusting of the residual accommodation amount of reactive power includes:
The current voltage of grid entry point reach the target voltage values need to carry out it is described reduce regulated quantity Reactive-power control when, it is idle
Compensation device can reduce reactive power, and reactive power compensator needs reduced reactive power greater than the electricity of reactive power compensator
Press idle sensitivity；
The current voltage of grid entry point reach the target voltage values need to carry out it is described increase regulated quantity Reactive-power control when, it is idle
Compensation device can increase reactive power, and reactive power compensator needs electricity of the increased reactive power greater than reactive power compensator
Press idle sensitivity.
7. automatic voltage control method according to claim 3, which is characterized in that when inverter idle undercapacity with
When realizing the adjusting of the residual accommodation amount of reactive power, calculates and realize the residual accommodation amount by adjusting reactive power compensator
The idle power output adjusted, when the direction that the idle power output for adjusting reactive power compensator needs change to contribute is calculated, power output
Direction include issuing reactive power, absorbing reactive power, and when determining to need to adjust the idle power output of reactive power compensator not
When leading to control bus voltage out-of-limit, the residue is realized by the idle power output that adjusting reactive power compensator is calculated
The adjusting of regulated quantity.
8. a kind of automatism voltage control device, which is characterized in that including processor, for realizing the instruction of following steps:
1) target voltage values of grid entry point are obtained, in conjunction with the current operating condition in power station, the current voltage for calculating grid entry point reaches
The increase regulated quantity of reactive power or reduction regulated quantity when the target voltage values；
2) the current idle power output of reactive power compensator is detected；When the direction of the current idle power output of reactive power compensator is to issue
Reactive power, and the current voltage of grid entry point reaches the target voltage values and needs to carry out the Reactive-power control for reducing regulated quantity
When, the idle power output by discharging reactive power compensator realizes the Reactive-power control for reducing regulated quantity；
When the direction of the current idle power output of reactive power compensator is absorbing reactive power, and the current voltage of grid entry point reaches institute
State target voltage values need to carry out it is described increase regulated quantity Reactive-power control when, pass through release reactive power compensator idle power output
Realize the Reactive-power control for increasing regulated quantity.
9. automatism voltage control device according to claim 8, which is characterized in that control the release reactive power compensator
Idle power output after reactive power compensator idle power output not in setting range, the setting range is that reactive power compensator carries out
The dead zone range that reactive power is adjusted.
10. automatism voltage control device according to claim 8 or claim 9, which is characterized in that when the whole reactive compensation of release
The idle undercapacity of device calculates the surplus of reactive power to realize the increase regulated quantity of the reactive power or reduce regulated quantity
Remaining regulated quantity realizes the adjusting of the residual accommodation amount of reactive power by adjusting the idle power output of inverter.
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