CN107706936A - The method that DC transmission system power automatically controls - Google Patents
The method that DC transmission system power automatically controls Download PDFInfo
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- CN107706936A CN107706936A CN201711073097.9A CN201711073097A CN107706936A CN 107706936 A CN107706936 A CN 107706936A CN 201711073097 A CN201711073097 A CN 201711073097A CN 107706936 A CN107706936 A CN 107706936A
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- 230000011664 signaling Effects 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 8
- 230000006978 adaptation Effects 0.000 claims description 6
- 238000000205 computational method Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 2
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Classifications
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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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- H02J13/0013—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a kind of method that DC transmission system power automatically controls, and belongs to field of power system control, including：DC control global parameter is set in AGC system；AGC models are expanded, establish DC control object model, the control parameter of DC control object is set, passes through the data interaction of the model realization scheduling station and DC converter station；DC control instruction generation and check；Direct current safety interlocking.The present invention, using the bipolar general power of direct current sending end as control object, establishes the DC control model at scheduling station end by the extension to Automatic Generation Control function；Realize scheduling station to automatically control direct current transmission power, there is provided direct current tracking Plan Curve and trace scheduling person specify two kinds of control models of power.
Description
Technical field
The present invention relates to field of power system control, and specifically, more particularly to a kind of DC transmission system power is automatic
The method of control.
Background technology
The power adjusting rapid flexible of D.C. high voltage transmission (HVDC), the stability problem of synchronous operation is not present in itself
And the capacity of short circuit for the system that will not increase exchanges, thus be considered as comparatively ideal super-pressure, remote conveying electrically, in recent years
Very big development is obtained in China, many nets adjust region all to form the alternating current-direct current of multi-infeed HVDC and mix transmission of electricity at present
System.Direct current transportation can be coupled the different power system of rated frequency, using the direct current transportation link of " back-to-back ", can be achieved
The transmission and exchange of power between different rated frequency AC electric power systems.
At present, EMS system is communicated by data network and special line with current conversion station, using the Standards Codes of IEC 104, can be obtained
The remote measurement of each DC converter station primary equipment and Control protection system, remote signalling information, and it is online to realize direct current transportation plan
The function such as issue, tentatively possessed scheduling station and implemented direct current remote control, the primary condition of remote regulating.
DC transmission system due to it is highly controllable, governing speed is fast, pondage is big, there is larger power adjusting energy
Power, urgent control measures can be provided for the exchange interacted system in transient process under large disturbances.But current China's direct current transportation
System typically all uses constant transmission power mode, the direct control at scheduling station end is also not implemented, it is difficult to which it is defeated to have given play to direct current
These good characteristics of electric system.
The content of the invention
In order to solve problem of the prior art, the embodiments of the invention provide a kind of DC transmission system power to automatically control
Method.The technical scheme is as follows：
On the one hand, there is provided a kind of method that DC transmission system power automatically controls, including：
DC control global parameter is set in AGC system；
AGC models are expanded, establish DC control object model, set the control parameter of DC control object, are led to
Cross the data interaction that the DC control object model realizes scheduling station and DC converter station；
Target instruction target word is obtained by two kinds of control models of BASEO and SCHEO, after generation DC control instruction, to described straight
The validity of flow control instructions decides whether to issue after being checked；
When the direct current object controlled occurs abnormal, exit control and turn pause, in certain time out, if made
Condition into pause disappears, then the control model automatically switched back into before pause；Otherwise, then closed-loop control is exited.
Further, described the step of establishing DC control object model, specifically includes：
Set DC control global parameter；The global parameter includes control zone title, DC operation state, data acquisition
Cycle, instruction calculating cycle, whether operation with closed ring；
DC control object model is established, control parameter is set；The control parameter includes the power adjusting upper limit, power is adjusted
Save lower limit, the rate adaptation upper limit, rate adaptation lower limit.
Further, the DC control object model is AGC actual control object, for completing and direct current substation
Data interaction；
Wherein, the data interacted include DC adjustment speed remote regulating amount, direct current target power remote regulating amount, main website side direct current
Slave mode remote control amount, DC bipolar general power telemetry value, regulation bound telemetry value, the regulations speed bound of DC bipolar
It is telemetry value, current regulations speed telemetry value, the target power telemetry value currently to come into force, the controllable remote signalling of bipolar power present value, double
Pole power adjusting controllable-rate remote signalling, the total remote signalling of alternating current-direct current protection act.
Further, the instruction of described DC control includes bipolar power remote regulating instruction and regulations speed remote regulating instruction.
Further, described to obtain target instruction target word by two kinds of control models of BASEO and SCHEO, generation DC control refers to
After order, to the DC control instruction validity check after decide whether to issue the step of specifically include：
1) control model is read, calculates bipolar power desired control target and regulations speed desired control target；
2) if BASEO patterns, bipolar power desired control target=artificial arranges value, regulations speed desired control target
=artificial arranges value；
3) if SCHEO patterns, bipolar power desired control target=under the planned value of whole 15 minutes, regulations speed it is expected
Control targe=regulation performance number/current residual regulating time；
4) bipolar power desired control target and regulations speed desired control target are subjected to validity check, specifically referred to
Make check method as follows：BASEO patterns：It is artificial that the basic point power of DC control object is set and it is expected regulations speed while right
The numerical value of setting carries out validity check, during beyond the bound scope of permission, is prompted, and cancel setting；SCHEO moulds
Formula：Judge whether planned value and desired regulations speed exceed regulation bound, if going beyond the scope, be limited to set
Limit value on；
5) regulated quantity Δ P is calculated, its computational methods is that Δ P=desired controls target-reality is contributed；
6) to adjust step-length as constraint, regulated quantity Δ P is checked, if Δ P>Step-length is adjusted, then sets Δ P=regulations
Step-length, the actual control targe of final bipolar power=actual output+Δ P is obtained, be limited to about up and down with the speed manually set
Beam, obtain final remote regulating rate control target.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
The method that a kind of DC transmission system power provided by the invention automatically controls, by Automatic Generation Control function
Extension, using the bipolar general power of direct current sending end as control object, establish the DC control model at scheduling station end；Realize tune
Degree main website automatically controls to direct current transmission power, there is provided direct current tracking Plan Curve and trace scheduling person specify two kinds of power
Control model.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the method flow diagram that the DC transmission system power of the embodiment of the present invention automatically controls；
Fig. 2 is the DC control instruction generation of the embodiment of the present invention and the flow chart checked.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
The invention provides a kind of method that DC transmission system power automatically controls, referring to Fig. 1, including：
S100：DC control global parameter is set in AGC system.
In the present embodiment, the parameter comes into force to control object all in control zone, specifically provides a kind of using certainly
Dynamic Generation Control (AGC) realizes the method that DC transmission system power automatically controls.
S200：AGC models are expanded, establish DC control object model, the control ginseng of setting DC control object
Number, passes through the data interaction of the model realization scheduling station and DC converter station.
In the present embodiment, described the step of establishing DC control object model, specifically includes：
Set DC control global parameter；The global parameter includes control zone title, DC operation state, data acquisition
Cycle, instruction calculating cycle, whether operation with closed ring；
DC control object model is established, control parameter is set；The control parameter includes the power adjusting upper limit, power is adjusted
Save lower limit, the rate adaptation upper limit, rate adaptation lower limit.
Further, the DC control object model is AGC actual control object, for completing and direct current substation
Data interaction；
Wherein, the data interacted include DC adjustment speed remote regulating amount, direct current target power remote regulating amount, main website side direct current
Slave mode remote control amount, DC bipolar general power telemetry value, regulation bound telemetry value, the regulations speed bound of DC bipolar
It is telemetry value, current regulations speed telemetry value, the target power telemetry value currently to come into force, the controllable remote signalling of bipolar power present value, double
Pole power adjusting controllable-rate remote signalling, the total remote signalling of alternating current-direct current protection act.
S300：Target instruction target word is obtained by two kinds of control models of BASEO and SCHEO, after generation DC control instruction, to referring to
The validity of order decides whether to issue after being checked.
In the present embodiment, step S300 is specially DC control instruction generation and checked；Described DC control instruction bag
Include bipolar power remote regulating instruction and regulations speed remote regulating instruction.
Further, specifically included referring to Fig. 2, the DC control instruction generation with the step of check：
1) control model is read, calculates bipolar power desired control target and regulations speed desired control target；
2) if BASEO patterns, bipolar power desired control target=artificial arranges value, regulations speed desired control target
=artificial arranges value；
3) if SCHEO patterns, bipolar power desired control target=under the planned value of whole 15 minutes, regulations speed it is expected
Control targe=regulation performance number/current residual regulating time；
4) bipolar power desired control target and regulations speed desired control target are subjected to validity check, specifically referred to
Make check method as follows：BASEO patterns：It is artificial that the basic point power of DC control object is set and it is expected regulations speed while right
The numerical value of setting carries out validity check, during beyond the bound scope of permission, is prompted, and cancel setting；SCHEO moulds
Formula：Judge whether planned value and desired regulations speed exceed regulation bound, if going beyond the scope, be limited to set
Limit value on；
5) regulated quantity Δ P is calculated, its computational methods is that Δ P=desired controls target-reality is contributed；
6) to adjust step-length as constraint, regulated quantity Δ P is checked, if Δ P>Step-length is adjusted, then sets Δ P=regulations
Step-length, the actual control targe of final bipolar power=actual output+Δ P is obtained, be limited to about up and down with the speed manually set
Beam, obtain final remote regulating rate control target.
S400：The direct current object controlled, when an exception occurs, exit control and turn pause, in certain time out,
If the condition of pause is caused to disappear, the control model automatically switched back into before pause；Otherwise, then closed-loop control is exited.
In the present embodiment, specific steps S400 is specially direct current safety interlocking；Additionally provide and make in the present embodiment simultaneously
Into the condition of direct current pause, the condition for causing direct current to suspend has：
Power measurement is invalid；
It is invalid that speed measures；
The controllable measurement of power is invalid；
It is invalid that controllable-rate measures；
During using remote measurement power limit, remote measurement power limit is invalid；
During using remote measurement speed limit value, remote measurement speed limit value is invalid；
During SCHEO patterns, plan is invalid.
Further, the condition for causing direct current to exit closed-loop control while is additionally provided in the present embodiment, it is described to cause
The condition that direct current exits closed-loop control has：
Main website verifies after power instruction intervals are issued to direct current tracking situation, if in the meantime not
Meet tracking and testing condition, then it is assumed that it is not performing properly the regulating command value issued, is exited closed-loop control；
Scheduling station at the scene alternating current-direct current protection resultant signal action when, exit closed-loop control；
Under scheduled mode, if the planned value read exceeds power regulating range, closed-loop control is exited.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
The method that a kind of DC transmission system power provided by the invention automatically controls, by Automatic Generation Control function
Extension, using the bipolar general power of direct current sending end as control object, establish the DC control model at scheduling station end；Realize tune
Degree main website automatically controls to direct current transmission power, there is provided direct current tracking Plan Curve and trace scheduling person specify two kinds of power
Control model.
Device embodiment described above is only schematical, wherein can be as the unit that separating component illustrates
Or may not be physically separate, it can be as the part that unit is shown or may not be physical location, i.e.,
A place can be located at, or can also be distributed on multiple NEs.It can select according to the actual needs therein
Some or all of module realizes the purpose of this embodiment scheme.Those of ordinary skill in the art are not paying the labor of creativeness
In the case of dynamic, you can to understand and implement.
Presently preferred embodiments of the present invention is these are only, is not intended to limit the invention, it is all in the spirit and principles in the present invention
Within, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (5)
1. a kind of method that DC transmission system power automatically controls, it is characterised in that including：
DC control global parameter is set in AGC system；
AGC models are expanded, establish DC control object model, the control parameter of DC control object is set, passes through institute
State the data interaction that DC control object model realizes scheduling station and DC converter station；
Target instruction target word is obtained by two kinds of control models of BASEO and SCHEO, after generation DC control instruction, to the direct current control
The validity of system instruction decides whether to issue after being checked；
When the direct current object controlled occurs abnormal, exit control and turn pause, in certain time out, if caused temporarily
The condition stopped disappears, then the control model automatically switched back into before pause；Otherwise, then closed-loop control is exited.
2. the method as described in claim 1, it is characterised in that described the step of establishing DC control object model specifically wraps
Include：
Set DC control global parameter；The global parameter includes control zone title, DC operation state, data acquisition week
Phase, instruction calculating cycle, whether operation with closed ring；
DC control object model is established, control parameter is set；The control parameter is included under the power adjusting upper limit, power adjusting
Limit, the rate adaptation upper limit, rate adaptation lower limit.
3. method as claimed in claim 2, it is characterised in that the DC control object model is AGC actual control pair
As for completing the data interaction with direct current substation；
Wherein, it is controlled that the data interacted include DC adjustment speed remote regulating amount, direct current target power remote regulating amount, main website side direct current
State remote control amount, DC bipolar general power telemetry value, the regulation bound telemetry value of DC bipolar, regulations speed bound remote measurement
Value, current regulations speed telemetry value, the target power telemetry value currently to come into force, the controllable remote signalling of bipolar power present value, bipolar work(
The controllable remote signalling of rate regulations speed, the total remote signalling of alternating current-direct current protection act.
4. method as claimed in claim 3, it is characterised in that described DC control instruction includes bipolar power remote regulating instruction
Instructed with regulations speed remote regulating.
5. method as claimed in claim 4, it is characterised in that described to obtain mesh by two kinds of control models of BASEO and SCHEO
Mark instruction, generation DC control instruction after, to the DC control instruction validity check after decide whether what is issued
Step specifically includes：
1) control model is read, calculates bipolar power desired control target and regulations speed desired control target；
2) if BASEO patterns, bipolar power desired control target=artificial arranges value, regulations speed desired control target=people
Work arranges value；
3) if SCHEO patterns, bipolar power desired control target=under the planned value of whole 15 minutes, regulations speed desired control
Target=regulation performance number/current residual regulating time；
4) bipolar power desired control target and regulations speed desired control target are subjected to validity check, specifically instruct school
Kernel method is as follows：BASEO patterns：It is artificial that the basic point power of DC control object is set and it is expected regulations speed, while to setting
Numerical value carry out validity check, during beyond the bound scope of permission, prompted, and cancel setting；SCHEO patterns：Sentence
Whether disconnected planned value and desired regulations speed exceed regulation bound, if going beyond the scope, are limited to set limit
In value；
5) regulated quantity Δ P is calculated, its computational methods is that Δ P=desired controls target-reality is contributed；
6) to adjust step-length as constraint, regulated quantity Δ P is checked, if Δ P>Step-length is adjusted, then sets Δ P=regulation steps
It is long, the actual control targe of final bipolar power=actual output+Δ P is obtained, is limited to constrain up and down with the speed manually set,
Obtain final remote regulating rate control target.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711073097.9A CN107706936A (en) | 2017-11-03 | 2017-11-03 | The method that DC transmission system power automatically controls |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711073097.9A CN107706936A (en) | 2017-11-03 | 2017-11-03 | The method that DC transmission system power automatically controls |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070038335A1 (en) * | 2005-07-22 | 2007-02-15 | Mcintyre Timothy J | Real Power Regulation for the Utility Power Grid Via Responsive Loads |
| CN104617572A (en) * | 2014-12-24 | 2015-05-13 | 国家电网公司 | Flexible direct-current power regulation method for island power supply |
| CN105335791A (en) * | 2014-08-07 | 2016-02-17 | 中国南方电网有限责任公司 | AC/DC large power grid coordinative optimization automatic control method and system |
| CN105529748A (en) * | 2016-01-11 | 2016-04-27 | 中国南方电网有限责任公司 | Automatic generation control system and method suitable for dynamic simulation of power system |
| CN106300442A (en) * | 2016-09-20 | 2017-01-04 | 国网浙江省电力公司电力科学研究院 | A kind of control method of thermal power generation unit responsive electricity grid low frequency fault accommodation |
-
2017
- 2017-11-03 CN CN201711073097.9A patent/CN107706936A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070038335A1 (en) * | 2005-07-22 | 2007-02-15 | Mcintyre Timothy J | Real Power Regulation for the Utility Power Grid Via Responsive Loads |
| CN105335791A (en) * | 2014-08-07 | 2016-02-17 | 中国南方电网有限责任公司 | AC/DC large power grid coordinative optimization automatic control method and system |
| CN104617572A (en) * | 2014-12-24 | 2015-05-13 | 国家电网公司 | Flexible direct-current power regulation method for island power supply |
| CN105529748A (en) * | 2016-01-11 | 2016-04-27 | 中国南方电网有限责任公司 | Automatic generation control system and method suitable for dynamic simulation of power system |
| CN106300442A (en) * | 2016-09-20 | 2017-01-04 | 国网浙江省电力公司电力科学研究院 | A kind of control method of thermal power generation unit responsive electricity grid low frequency fault accommodation |
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