CN107359626A - A kind of extensive new energy base power network sub-synchronous oscillation control method - Google Patents
A kind of extensive new energy base power network sub-synchronous oscillation control method Download PDFInfo
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- CN107359626A CN107359626A CN201710814666.4A CN201710814666A CN107359626A CN 107359626 A CN107359626 A CN 107359626A CN 201710814666 A CN201710814666 A CN 201710814666A CN 107359626 A CN107359626 A CN 107359626A
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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Abstract
The invention discloses a kind of extensive new energy base power network sub-synchronous oscillation control method.Belong to power system automatic field.The present invention gathers the three-phase current and voltage of transformer station or all circuits of new energy station high and low pressure side first, carries out signal transacting to every circuit, monitors the sub-synchronous oscillation power phasor of every circuit；According to high-pressure side circuit sub-synchronous oscillation power features, it is determined whether need to take control measure, and calculate the sub-synchronous oscillation power of all circuits in high-pressure side phasor and；Compare contribution degree of each circuit of low-pressure side to high-pressure side sub-synchronous oscillation amplitude, it is determined whether need to cut off low-pressure side circuit, low-pressure side circuit is then cut off according to contribution degree if demand.The present invention local information that only needs to gather single transformer station or new energy station can make a policy judgements, and the sub-synchronous oscillation that specific region can be achieved monitors, and also responsible Wide-area Measurement Information networking is realized the hierarchical control of whole power network, can flexibly implemented according to Practical Project.
Description
Technical field
The invention belongs to power system automation technology field, and more precisely the present invention relates to a kind of extensive new energy
Base power network sub-synchronous oscillation control method.
Background technology
Under the guiding of " two replacements ", China's new energy development obtains fast development, system of State Grid Corporation of China in recent years
System new energy installation has broken through 100,000,000 kilowatts, and wind-powered electricity generation and grid-connected capacity have leapt to the first in the world, particularly " three Norths " area
Developing and utilizingpotentiality is huge, has formd multiple extensive new energy bases at present.It is worth noting that China's new energy is sent out
Electricity needs just be sent to the load center of the central and east through ultra-high/extra-high voltage transmission over long distances, in wind-driven generator inverter, SVC,
Sub-synchronous oscillation is likely to occur in the presence of many factors such as SVG, direct current transportation and serial compensation capacitance, and with Northwest Grid
The permeability of wind-powered electricity generation increasingly increases, and system sub-synchronous oscillation risk dramatically increases, the extensive new energy to have put into operation at present
Multiple sub-synchronous oscillation phenomenon had occurred for base, seriously affected the safe and stable operation of power network.
It is the off-line analysis based on PMU recorded broadcast data after accident mostly to the analysis method of sub-synchronous oscillation at present, or only
Detect whether a certain area occurs sub-synchronous oscillation, effective control measure can not be taken online.Practical it is subsynchronous
Vibrate monitoring system and also proposed successively based on oscillation of power principle and torsional oscillation protection principle secondary same in stage of fumbling, domestic manufacturer
It is typically off-the-line Key generating unit or circuit to walk oscillating control systems and method, its control strategy, or based on new energy station
The exploratory progressively excision to it of oscillation amplitude size, the economic performance and itself and power network of new energy station itself are not accounted for
Oscillatory Coupling relation, application effect is not good enough.Therefore, research and propose and new shaken suitable for extensive the subsynchronous of new energy base
It is very necessary to swing control method.
The content of the invention
Present invention aim to address sub-synchronous oscillation phenomenon existing for existing extensive new energy base, there is provided a kind of
Sub-synchronous oscillation control method based on new energy station oscillating contribution degree.This method is to extensive new energy base transformer station
Or on the basis of the monitoring in real time of new energy station high and low pressure side, by comparing both sides oscillation characteristicses, calculating provide progressively cut off it is low
The method for pressing side line road, effective control of extensive new energy base power network sub-synchronous oscillation can be achieved.
Specifically, the present invention specifically uses following technical scheme, comprises the following steps：
1) three-phase current and voltage of all circuits of high and low pressure side of monitoring substation or new energy station, calculating are real in real time
When power, and to power carry out subsynchronous component detection；
2) judge whether power subsynchronous component meets operation condition in any circuit electrical quantity in high-pressure side, remember if meeting
Lower subsynchronous component frequency fSSOAnd continue step 3), otherwise exit this method；
3) it is f to extract frequency in all circuits in high-pressure sideSSOPower subsynchronous component, calculate phasor and
4) each circuit pair of low-pressure side is calculatedContribution degree；
If 5) the maximum c ontr in the contribution degree obtained in step 4)maxMore than the threshold value of setting, then judge to need
Control measure are taken, continues step 6), otherwise exits this method；
6) according to the contribution degree order from big to small of each circuit of low-pressure side, that maximum low pressure side line of excision contribution degree
Road.
Above-mentioned technical proposal is further characterized by, and in the step 2), judges whether power subsynchronous component meets
The method of operation condition is：Set the bound of subsynchronous component frequency range, power subsynchronous component amplitude threshold and dynamic
Make time period threshold, when power subsynchronous component amplitude is more than the threshold value and subsynchronous component frequency of setting in certain circuit electrical quantity
fSSOIn setting range and the duration exceedes actuation time threshold, then it is assumed that meets operation condition.
Above-mentioned technical proposal is further characterized by, each circuit pair of step 4) low-pressure sideContribution
Spending computational methods is：
Wherein, contriIt is the contribution degree of i-th of low-pressure side circuit,It is the subsynchronous of i-th low-pressure side circuit
Power phasor existsOn projection；raveiIt is that i-th of low-pressure side circuit is given a dinner for a visitor from afar the mean speed of electric field, if the line
There is no wind field under road, then set raveiFor 1；LenbaseiIt is the line length of i-th of low-pressure side circuit of benchmark, its value is equal to
The physical length divided by most long low-pressure side line length of i-th low-pressure side circuit；K1, K2It is the weight coefficient of pre-selection setting, its
Value is no more than 0.2.
Above-mentioned technical proposal is further characterized by, and each circuit in high-pressure side of required monitoring can be high by monitoring all main transformers
Side is pressed to substitute.
Beneficial effects of the present invention are as follows：The present invention solves sub-synchronous oscillation existing for existing extensive new energy base
Problem, the sub-synchronous oscillation occurred in power network can be quickly identified, and take control to arrange according to the contribution degree of each new energy station
Apply.Present invention can apply to extensive new energy base transformer station, booster stations or new energy station, it is only necessary to gather single power transformation
Stand or the local information of new energy station can make a policy judgement, the sub-synchronous oscillation monitoring of specific region can be achieved, also may be used
The hierarchical control that whole power network is realized in Wide-area Measurement Information networking is relied on, can flexibly be implemented according to Practical Project.Greatly save manpower,
Material resources and financial resources, improve automaticity and efficiency.
Brief description of the drawings
Fig. 1 is the sub-synchronous oscillation control method implementation process schematic diagram of the embodiment of the present invention.
Fig. 2 is new energy base substation structure schematic diagram.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
Embodiment 1：
As illustrated in fig. 2, it is assumed that there is n loop lines road certain new energy base transformer station high-pressure side to major network, low-pressure side has m telegrams in reply source
Line to new energy station, our station shares k platform main transformers.
The implementation process of the present embodiment as shown in figure 1, monitor the transformer station or new energy station high and low pressure side in real time first
The three-phase current and voltage of all circuits, main transformer, calculate the realtime power of every circuit；And fft analysis is carried out to realtime power,
Obtain the subsynchronous component of power under each frequency band.
Next, it is determined that high-pressure side is as follows with the presence or absence of power subsynchronous component satisfaction in certain circuit or certain main transformer electrical quantity
Condition, satisfaction then continue following steps, otherwise exited：
(a) power subsynchronous component amplitude is more than the threshold value of setting；
(b) subsynchronous component frequency fSSOIn setting range；
(c) meet that the duration of condition (a) (b) exceedes setting time threshold.
Next, frequency is f in the extraction all circuits in high-pressure sideSSOPower subsynchronous component Calculate phasor andOr extraction main transformer high-pressure side frequency is
fSSOPower subsynchronous componentThen
Extract fSSOThe subsynchronous power phasor of each circuit of low-pressure side under frequency band It is right that its is calculated respectivelyContribution degree contr1,contr2... ..., contrm.Wherein low-pressure side is each
Circuit pairContribution degree computational methods be：
Wherein, contriIt is the contribution degree of i-th of low-pressure side circuit,It is the subsynchronous of i-th low-pressure side circuit
Power phasor existsOn projection；raveiIt is that i-th of low-pressure side circuit is given a dinner for a visitor from afar the mean speed of electric field, if the line
There is no wind field under road, then set raveiFor 1；LenbaseiIt is the line length of i-th of low-pressure side circuit of benchmark, its value is equal to
The physical length divided by most long low-pressure side line length of i-th low-pressure side circuit；K1, K2It is the weight coefficient of pre-selection setting, its
Value is no more than 0.2.
Further calculate each circuit contribution degree maximum c ontr of low-pressure sidemax=max { contri, if contrmaxIt is more than
The threshold of setting, then judge to need to take control measure, otherwise exit；
Finally, by contr1,contr2... ..., contrmSorted according to order from big to small, excision contribution degree is maximum
Low-pressure side circuit.
Although the present invention is disclosed as above with preferred embodiment, embodiment is not for limiting the present invention's.Not
In the spirit and scope for departing from the present invention, any equivalence changes done or retouching, the protection domain of the present invention is also belonged to.Cause
This protection scope of the present invention should be using the content that claims hereof is defined as standard.
Claims (4)
1. a kind of extensive new energy base power network sub-synchronous oscillation control method, it is characterised in that comprise the following steps：
1) three-phase current and voltage of all circuits of high and low pressure side of real-time monitoring substation or new energy station, calculates real-time work(
Rate, and subsynchronous component detection is carried out to power；
2) judge whether power subsynchronous component meets operation condition in any circuit electrical quantity in high-pressure side, write down if meeting secondary
Synchronized component frequency fSSOAnd continue step 3), otherwise exit this method；
3) it is f to extract frequency in all circuits in high-pressure sideSSOPower subsynchronous component, calculate phasor and
4) each circuit pair of low-pressure side is calculatedContribution degree；
If 5) the maximum c ontr in the contribution degree obtained in step 4)maxMore than the threshold value of setting, then judge that needs are taken
Control measure, continue step 6), otherwise exit this method；
6) according to the contribution degree order from big to small of each circuit of low-pressure side, that maximum low-pressure side circuit of excision contribution degree.
2. extensive new energy base power network sub-synchronous oscillation control method according to claim 1, it is characterised in that institute
State in step 2), judge whether power subsynchronous component meets that the method for operation condition is：Set subsynchronous component frequency range
Bound, power subsynchronous component amplitude threshold and actuation time threshold, when subsynchronous point of power in certain circuit electrical quantity
Measure threshold value and subsynchronous component frequency f that amplitude is more than settingSSOIn setting range and the duration exceedes actuation time door
Sill, then it is assumed that meet operation condition.
3. extensive new energy base power network sub-synchronous oscillation control method according to claim 1, it is characterised in that institute
State each circuit pair of step 4) low-pressure sideContribution degree computational methods be：
<mrow>
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<mi>contr</mi>
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<msub>
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Wherein, contriIt is the contribution degree of i-th of low-pressure side circuit,It is the subsynchronous power of i-th of low-pressure side circuit
Phasor existsOn projection；raveiIt is that i-th of low-pressure side circuit is given a dinner for a visitor from afar the mean speed of electric field, if under the circuit
There is no wind field, then set raveiFor 1；LenbaseiIt is the line length of i-th of low-pressure side circuit of benchmark, its value is equal to i-th
The physical length of individual low-pressure side circuit divided by most long low-pressure side line length；K1, K2It is to preselect the weight coefficient set, its value
No more than 0.2.
4. according to any described extensive new energy base power network sub-synchronous oscillation control method of claims 1 to 3, its feature
It is, each circuit in high-pressure side of required monitoring can be substituted by monitoring all main transformer high-pressure sides.
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| CN201710814666.4A CN107359626B (en) | 2017-09-12 | 2017-09-12 | Subsynchronous oscillation control method for large-scale new energy base power grid |
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| CN107359626B CN107359626B (en) | 2020-05-15 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301842A (en) * | 2018-10-23 | 2019-02-01 | 国网吉林省电力有限公司 | A kind of wind power plant sub-synchronous oscillation cutting method based on negative damping contribution |
| CN110021962A (en) * | 2019-05-06 | 2019-07-16 | 长沙而道新能源科技有限公司 | A kind of determination method and apparatus of new energy grid connection system Oscillatory Coupling frequency |
| CN113839399A (en) * | 2021-09-08 | 2021-12-24 | 华北电力科学研究院有限责任公司 | New energy station high-frequency oscillation risk processing method and device |
| CN114285011A (en) * | 2021-12-22 | 2022-04-05 | 南京南瑞继保电气有限公司 | Multi-band subsynchronous/supersynchronous oscillation region overall cutting method and system |
| CN114928075A (en) * | 2022-05-23 | 2022-08-19 | 国家电网有限公司华东分部 | Subsynchronous oscillation control method based on instantaneous active power of power grid line |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009495A (en) * | 2014-05-14 | 2014-08-27 | 上海交通大学 | Wind power plant flexible direct current grid connection subsynchronous oscillating current detection and suppression method |
| CN105488315A (en) * | 2014-09-16 | 2016-04-13 | 国家电网公司 | Analysis method for subsynchronous oscillation generated by grid connection of wind driven generators |
-
2017
- 2017-09-12 CN CN201710814666.4A patent/CN107359626B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009495A (en) * | 2014-05-14 | 2014-08-27 | 上海交通大学 | Wind power plant flexible direct current grid connection subsynchronous oscillating current detection and suppression method |
| CN105488315A (en) * | 2014-09-16 | 2016-04-13 | 国家电网公司 | Analysis method for subsynchronous oscillation generated by grid connection of wind driven generators |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301842A (en) * | 2018-10-23 | 2019-02-01 | 国网吉林省电力有限公司 | A kind of wind power plant sub-synchronous oscillation cutting method based on negative damping contribution |
| CN109301842B (en) * | 2018-10-23 | 2022-04-22 | 国网吉林省电力有限公司 | Wind power plant subsynchronous oscillation cutting method based on negative damping contribution |
| CN110021962A (en) * | 2019-05-06 | 2019-07-16 | 长沙而道新能源科技有限公司 | A kind of determination method and apparatus of new energy grid connection system Oscillatory Coupling frequency |
| CN110021962B (en) * | 2019-05-06 | 2020-10-27 | 河北新天科创新能源技术有限公司 | Method and device for determining oscillation coupling frequency of new energy grid-connected system |
| CN113839399A (en) * | 2021-09-08 | 2021-12-24 | 华北电力科学研究院有限责任公司 | New energy station high-frequency oscillation risk processing method and device |
| CN113839399B (en) * | 2021-09-08 | 2024-03-26 | 华北电力科学研究院有限责任公司 | New energy station high-frequency oscillation risk processing method and device |
| CN114285011A (en) * | 2021-12-22 | 2022-04-05 | 南京南瑞继保电气有限公司 | Multi-band subsynchronous/supersynchronous oscillation region overall cutting method and system |
| CN114928075A (en) * | 2022-05-23 | 2022-08-19 | 国家电网有限公司华东分部 | Subsynchronous oscillation control method based on instantaneous active power of power grid line |
| CN114928075B (en) * | 2022-05-23 | 2024-05-07 | 国家电网有限公司华东分部 | Control method of subsynchronous oscillation based on instantaneous active power of power grid line |
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