CN106372331A - Loop closing fixed value setting and checking method of ultra-high voltage alternating-current system - Google Patents
Loop closing fixed value setting and checking method of ultra-high voltage alternating-current system Download PDFInfo
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- CN106372331A CN106372331A CN201610798807.3A CN201610798807A CN106372331A CN 106372331 A CN106372331 A CN 106372331A CN 201610798807 A CN201610798807 A CN 201610798807A CN 106372331 A CN106372331 A CN 106372331A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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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
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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
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Abstract
The invention relates to a loop closing fixed value setting and checking method of an ultra-high voltage alternating-current system. The loop closing fixed value setting and checking method comprises a fixed value setting part and a fixed value checking part, wherein the fixed value setting part comprises loop closing voltage difference fixed value and phase angle difference fixed value setting. According to the loop closing fixed value setting and checking method of the technical scheme provided by the invention, reactive voltage and tidal current distribution of the ultra-high voltage alternating-current system are accurately analyzed, and a loop closing voltage difference fixed value is determined according to a tapping gear of an ultra-high voltage transformer, the operating level of network voltage and the like; a loop closing phase angle difference fixed value is determined according to section power and tidal current distribution before loop closing; whether the fixed values are feasible is checked according to the influence of loop closing impact power on the stability of a power system. The loop closing fixed value setting and checking method is suitable for the ultra-high voltage alternating-current power transmission system.
Description
Technical field
The present invention relates to a kind of check method of adjusting of extra-high-voltage alternating current system is and in particular to a kind of extra-high-voltage alternating current system
Cyclization fixed value adjusting check method.
Background technology
Extra-high-voltage alternating current system refers to the AC electric power systems of 1000 kilovolts and above.Cyclization refers in electric power
In system, the Network Closing that circuit, transformator or chopper string are constituted is run.For example, system shown in Figure 11 and system 2 are logical
Cross alternating current circuit 1 to connect, alternating current circuit 2 side switch closes (shown in black), opposite side switch k (shown in white) is in disconnected
Open state, then the operation of closure switch k is exactly Loop Closing Operation.
When the voltage difference of cyclization point both sides and phase angle difference are excessive, larger to the power rush of power system during cyclization, close
Power flow changing after ring is also larger, power system may be led to lose stable.Accordingly, it would be desirable to be given suitable cyclization voltage difference and
Phase angle difference setting valve.When the voltage difference of cyclization point both sides and phase angle difference actual value just allow switch motion to carry out when being less than setting valve
Loop Closing Operation, does not otherwise carry out Loop Closing Operation.
According to long-term operating experience, in China's schedule regulation, the cyclization definite value for high pressure/extra-high voltage Force system will
Seeking Truth: the voltage difference definite value maximum of 500kv system is not to be exceeded that 10%, the 220kv system maximum of rated voltage is not to be exceeded volume
Determine the 20% of voltage；The phase angle difference definite value of 500kv and 220kv system is typically not to be exceeded 20～30 degree.Adopt above-mentioned in operation
Cyclization definite value generally individually can guarantee that the smooth cyclization of power system security.But for 1000kv extra-high-voltage alternating current power system, by
In the engineering that puts into operation is less, run time is shorter, therefore there is no the setting range of the Regulations clear and definite cyclization definite value of correlation, not yet
See extra-high-voltage alternating current closing the ring fixed value calculation method, the definite value providing in practice lacks theory analysis and quantitative Analysis support,
This runs to the sacurity dispatching of extra-high-voltage alternating current system and brings difficulty.
Content of the invention
For solving above-mentioned deficiency of the prior art, it is an object of the invention to provide a kind of extra-high-voltage alternating current closing the ring is fixed
Value is adjusted check method, solves the problems, such as how rationally accurately to provide extra-high-voltage alternating current closing the ring definite value.
The purpose of the present invention is to be realized using following technical proposals:
The present invention provides a kind of extra-high-voltage alternating current closing the ring fixed value adjusting check method, and it thes improvement is that, described
Method comprises the steps:
Step 1: fixed value adjusting；With
Step 2: definite value is checked.
Further, the fixed value adjusting of described step 1 includes the step 11 carrying out side by side: voltage difference fixed value adjusting and step
12: phase angle difference fixed value adjusting.
Further, the voltage difference fixed value adjusting in described step 11 includes:
Step 110: the voltage control according to extra high voltage line throwing nonloaded line and Operating Voltage level determine extra-high
The tap gear of pressure transformer；
Step 111: control decoupling principle to determine cyclization point both sides voltage range and the most respectively according to cyclization point both sides voltage
Big voltage difference；
Step 112: according to maximum voltage difference and consider voltage margin, determine cyclization voltage difference definite value.
Further, in described step 111, cyclization point both sides include sky and fill line end side and bus side；For
Sky fills line end side, specifies longtime running standard according to extra-high voltage, determines that its ceiling voltage is 1100kv；For bus one
Side, by dispatching of power netwoks operating provisions, (minimum voltage of dispatching of power netwoks operating provisions is according to electric system simulation to its minimum voltage
Calculating the minimum voltage that the stable operation determining requires, if being less than this value, after grid collapses, having the risk of unstability) to
Go out；Both differences are the maximum voltage difference of cyclization point both sides.
Further, in described step 112, obtain cyclization voltage with the maximum voltage difference making alive nargin of cyclization point both sides
Difference definite value, described voltage margin takes 10kv.
Further, the phase angle difference fixed value adjusting in described step 12 includes:
Step 121: determine maximum power value and the near region transmission line of electricity maximum work of extra-high voltage cyclization circuit place section
Rate value；The maximum power value of section is calculated by electric system simulation, and section power is sent out when being more than the maximum power value of section
Electrical network unstability after raw fault；Near region transmission line of electricity maximum power value is determined by line power nonoverload after fault；
Step 122: arrange trend mode according to above-mentioned maximum power value in power system simulation software, calculate cyclization point
The maximum phase angle difference of both sides；
Step 123: according to maximum phase angle difference and consider Phase margin, determine cyclization phase angle difference definite value.
Further, in described step 122, cyclization point both sides include sky and fill line end side and bus side.
Further, in described step 123, it is fixed that cyclization point both sides phase angle difference obtains cyclization phase angle difference plus Phase margin
Value；Described Phase margin takes 5 °.
Further, the definite value of described step 2 is checked and is included: presses the voltage of above-mentioned determination in power system simulation software
Difference definite value and phase angle difference definite value arrange extra-high-voltage alternating current system operation mode before cyclization, and involutive ring operation carries out simulation calculation,
Extra high voltage line percussion power during analysis cyclization and power system stability situation.
Further, if to lead to power system to lose stable for extra high voltage line percussion power during cyclization, return step
Rapid 1 fixed value adjusting, equal proportion reduces cyclization voltage difference and phase angle difference definite value；
For new cyclization definite value, re-start definite value and check, and analyze power system stability situation；
Repeat to check and adjust, until Loop Closing Operation system stability.
Further, if final voltage difference definite value and phase angle difference definite value are less than initial definite value, line voltage is transported
Row controls requirement, section and near region Line Flow to control requirement to be modified.
Compared with immediate prior art, the excellent effect that the technical scheme of present invention offer has is:
Method proposed by the present invention according to extra-high-voltage alternating current System Reactive Power voltage and trend distribution character, in conjunction with power system
Stability analysis, proposes voltage difference definite value and the adjusting and check method of phase angle difference definite value during extra-high-voltage alternating current closing the ring, solves
How rationally accurately to provide the problem of extra-high-voltage alternating current closing the ring definite value.
Method proposed by the present invention have the advantages that theoretical sturdy, clear logic, analysis accurately, exploitativeness strong.Method
In theoretical based on electric power system tide and stability analysis, make full use of extra-high-voltage alternating current System Reactive Power voltage characteristic, trend distribution
Characteristic and cyclization impact characteristics research conclusion, the control both having considered the extra-high voltage AC circuit itself treating cyclization requires, and examines again
Consider influencing each other of Loop Closing Operation and power system stability.Whole method flow is clear, and thinking clearly, can be true according to the method
Fixed rational extra-high-voltage alternating current closing the ring definite value.
Brief description
Fig. 1 is Force system Loop Closing Operation schematic diagram；
Fig. 2 is the flow chart of the extra-high-voltage alternating current closing the ring fixed value adjusting check method that the present invention provides；
Fig. 3 is that Bei Jingdong in the specific embodiment one that the present invention provides-Jinan extra-high-voltage alternating current system correlation rack is illustrated
Figure；
Fig. 4 is extra high voltage line power after Loop Closing Operation in the specific embodiment one that the present invention provides.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in further detail.
The following description and drawings fully illustrate specific embodiments of the present invention, to enable those skilled in the art to
Put into practice them.Other embodiments can include structure, logic, electric, process and other change.Embodiment
Only represent possible change.Unless explicitly requested, otherwise individually assembly and function are optional, and the order operating is permissible
Change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This
The scope of bright embodiment includes the gamut of claims, and all obtainable of claims is equal to
Thing.Herein, these embodiments of the present invention individually or generally with term " invention " can be represented, this is only
For convenience, and if in fact disclosing the invention more than, the scope being not meant to automatically limit this application is to appoint
What single invention or inventive concept.
The purpose of the present invention is according to extra-high-voltage alternating current System Reactive Power voltage and trend distribution character, in conjunction with electric power system stability
Setting analysis, propose voltage difference definite value and the adjusting and check method of phase angle difference definite value during extra-high-voltage alternating current closing the ring, solve such as
What rationally accurately provides the problem of extra-high-voltage alternating current closing the ring definite value.
For the deficiencies in the prior art, the present invention proposes extra-high-voltage alternating current closing the ring fixed value adjusting check method, accurate
The really reactive voltage of analysis extra-high-voltage alternating current system and trend distribution, according to extra-high voltage transformer tap gear, line voltage fortune
Row level etc. determines cyclization voltage difference definite value；Determine that cyclization is mutually reported to the leadship after accomplishing a task definite value according to section power before cyclization and trend distribution；Root
Whether feasible check definite value according to the impact to power system stability for the cyclization percussion power.The present invention is applied to ultra-high voltage AC transmission
System.
The invention provides extra-high-voltage alternating current closing the ring fixed value adjusting check method, main contents include fixed value adjusting and
Definite value checks two parts.Fixed value adjusting part includes cyclization voltage difference definite value and phase angle difference fixed value adjusting.The flow process of the present invention is such as
Shown in Fig. 2, the flow process of the present invention specifically includes:
For voltage difference fixed value adjusting, comprising:
First, controlled according to the voltage that extra high voltage line throws nonloaded line and Operating Voltage level determines extra-high buckling
The tap gear of depressor.
Secondly, decoupling principle is controlled to determine both sides electricity respectively according to cyclization point both sides (sky fills line end and bus) voltage
Pressure scope and maximum voltage difference.Line end is filled for sky, specifies that longtime running ceiling voltage is 1100kv according to extra-high voltage；Right
In bus, by dispatching of power netwoks operating provisions, (minimum voltage of dispatching of power netwoks operating provisions is according to power system to its minimum voltage
The minimum voltage that the stable operation that simulation calculation determines requires, if being less than this value, has the risk of unstability after grid collapses)
Be given.Both differences get final product the maximum voltage difference of cyclization point both sides.
Again, according to maximum voltage difference and consider certain voltage margin, determine cyclization voltage difference definite value；With cyclization point two
The maximum voltage difference making alive nargin of side obtains cyclization voltage difference definite value, and described voltage margin takes 10kv.
For phase angle difference fixed value adjusting, comprising:
First, maximum power value and the near region transmission line of electricity peak power of extra-high voltage cyclization circuit place section are determined
Value；
Secondly, arrange trend mode according to above-mentioned maximum power value in power system simulation software, calculate cyclization point two
The maximum phase angle difference of side；
Again, according to maximum phase angle difference and consider certain Phase margin, determine cyclization phase angle difference definite value.Cyclization point both sides
Phase angle difference obtains cyclization phase angle difference definite value plus Phase margin；Described Phase margin takes 5 °.
The definite value of the method that the present invention provides checks part, presses the voltage difference of above-mentioned determination in power system simulation software
Definite value and phase angle difference definite value arrange extra-high-voltage alternating current system operation mode before cyclization, and involutive ring operation carries out simulation calculation, point
Extra high voltage line percussion power during analysis cyclization and power system stability situation.If cyclization impact leads to power system to lose surely
Fixed, then return the fixed value adjusting part of the method that the present invention provides, equal proportion reduces cyclization voltage difference and phase angle difference definite value.For
New cyclization definite value, re-starts definite value and checks, and calculates analysis power system stability situation.Repeat to check and adjust, directly
To Loop Closing Operation system stability.If final cyclization voltage difference and phase angle difference definite value are less than initial definite value, then need to electrical network
Voltage runs to control to require accordingly to be revised with section and the control requirement of near region Line Flow and (specifically how to revise and be not belonging to this
The technique study scope that invention provides).
Embodiment one
It is described in detail as a example Jingdone district-Jinan extra-high voltage AC circuit cyclization to the north of below, its rack schematic diagram such as Fig. 3
Shown.Wherein Bei Jingdong-Jinan is extra-high-voltage alternating current double loop, and pungent amp- Liaocheng, Huanghua-Binzhou are 500kv alternating current circuit, and this 6
Loop line constitutes the province's discontinuity surface between East China major network and Shandong Power.As shown in Fig. 2 the method that the present invention provides is embodied as flow process
As follows:
(1) voltage difference fixed value adjusting:
First, controlled according to the voltage that extra high voltage line throws nonloaded line and Operating Voltage level determines extra-high buckling
The tap gear of depressor.In the present embodiment, respectively after nonloaded line is thrown in Beijing east and Jinan, for ensureing line end voltage not
Super 1100kv, need to be controlled to the busbar voltage in Beijing east and Jinan.If the transformer tapping in Beijing east and Jinan is placed in
525kv gear, then need to control Beijing east not super 506kv of not super 1013kv, 500kv busbar voltage of 1000kv busbar voltage, need to control
The not super 507kv of not super 1015kv, 500kv busbar voltage of Jinan processed 1000kv busbar voltage.For dispatching of power netwoks runs,
It is larger that 500kv busbar voltage controls requirement to realize difficulty, needs to adjust transformer tapping gear.It is computed, by Beijing east and Ji
Southern main transformer tap adjusts to 538kv gear, then need to control not super 1014kv, 500kv bus electricity of Beijing east 1000kv busbar voltage
Press not super 519kv, the not super 520kv of not super 1015kv, 500kv busbar voltage of Jinan 1000kv busbar voltage, this voltage need to be controlled
Requirement is controlled to realize difficulty little.Accordingly, it is determined that the extra-high voltage transformer tap in Beijing east and Jinan is placed in 538kv gear.
Secondly, decoupling principle is controlled according to cyclization point both sides (cyclization point both sides include sky and fill line end and bus) voltage
Determine both sides voltage range and maximum voltage difference respectively.Line end is filled for sky, ceiling voltage is 1100kv；For bus,
The dispatching of power netwoks operating provisions minimum 515kv of its 500kv busbar voltage, converts and is about 1010kv to 1000kv side magnitude of voltage.Close
Circling point both sides voltage maximum difference is 90kv.
Again, according to maximum voltage difference and consider the nargin of 10kv, determine that cyclization voltage difference definite value is 100kv.
(2) phase angle difference fixed value adjusting:
First, maximum power value and the near region transmission line of electricity peak power of extra-high voltage cyclization circuit place section are determined
Value.What extra-high voltage cyclization circuit was located is North China-Shandong section, and its maximum power value is 4000mw.Beijing is to the east of Jinan 500kv
On transmission path, the maximum power value of single time 500kv circuit is 1500mw.
Secondly, arrange trend mode according to above-mentioned maximum power value in power system simulation software, calculate trend and understand
The maximum phase angle difference of cyclization point both sides is about 24 degree；
Again, according to maximum phase angle difference and consider certain nargin, determine that cyclization phase angle difference definite value is 30 degree.
(3) definite value is checked:
Voltage difference definite value 100kv determining by step (1) and (2) in power system simulation software and phase angle difference definite value 30
Degree arranges system operation mode before cyclization, and involutive ring operation carries out simulation calculation, extra high voltage line percussion power during cyclization
Peak value about 1817mw (as shown in Figure 4), system keeps stable.Can determine Bei Jingdong-Jinan extra-high-voltage alternating current closing the ring electricity
Pressure reduction definite value is 100kv, phase angle difference definite value is 30 degree.
The present embodiment is applied to adjusting and checking of Bei Jingdong-Jinan extra-high voltage AC circuit cyclization definite value, is suitable for simultaneously
In other extra-high-voltage alternating current systems it needs to be determined that the situation of cyclization definite value.
Above example is only not intended to limit in order to technical scheme to be described, although with reference to above-described embodiment pair
The present invention has been described in detail, and those of ordinary skill in the art still can enter to the specific embodiment of the present invention
Row modification or equivalent, these without departing from any modification of spirit and scope of the invention or equivalent, all in application
Within the claims of the pending present invention.
Claims (10)
1. a kind of extra-high-voltage alternating current closing the ring fixed value adjusting check method is it is characterised in that methods described comprises the steps:
Step 1: fixed value adjusting；With
Step 2: definite value is checked.
2. cyclization fixed value adjusting check method as claimed in claim 1 is it is characterised in that the fixed value adjusting bag of described step 1
Include the step 11 carrying out side by side: voltage difference fixed value adjusting and step 12: phase angle difference fixed value adjusting.
3. cyclization fixed value adjusting check method as claimed in claim 2 is it is characterised in that the voltage difference in described step 11 is fixed
Value adjust including:
Step 110: controlled according to the voltage that extra high voltage line throws nonloaded line and Operating Voltage level determines extra-high buckling
The tap gear of depressor；
Step 111: control decoupling principle to determine cyclization point both sides voltage range and maximum electricity respectively according to cyclization point both sides voltage
Pressure reduction；
Step 112: according to maximum voltage difference and consider voltage margin, determine cyclization voltage difference definite value.
4. cyclization fixed value adjusting check method as claimed in claim 3 is it is characterised in that in described step 111, cyclization point two
Side includes sky and fills line end side and bus side；Line end side is filled for sky, longtime running is specified according to extra-high voltage
Standard, determines that its ceiling voltage is 1100kv；For bus side, its minimum voltage is given by dispatching of power netwoks operating provisions；Two
The difference of person is the maximum voltage difference of cyclization point both sides.
5. cyclization fixed value adjusting check method as claimed in claim 3 is it is characterised in that in described step 112, use cyclization point
The maximum voltage difference making alive nargin of both sides obtains cyclization voltage difference definite value, and described voltage margin takes 10kv.
6. cyclization fixed value adjusting check method as claimed in claim 2 is it is characterised in that the phase angle difference in described step 12 is fixed
Value adjust including:
Step 121: determine maximum power value and the near region transmission line of electricity maximum power value of extra-high voltage cyclization circuit place section；
The maximum power value of section is calculated by electric system simulation, and section power breaks down when being more than the maximum power value of section
Electrical network unstability afterwards；Near region transmission line of electricity maximum power value is determined by line power nonoverload after fault；
Step 122: arrange trend mode according to above-mentioned maximum power value in power system simulation software, calculate cyclization point both sides
Maximum phase angle difference；
Step 123: according to maximum phase angle difference and consider Phase margin, determine cyclization phase angle difference definite value.
7. cyclization fixed value adjusting check method as claimed in claim 6 is it is characterised in that in described step 122, cyclization point two
Side includes sky and fills line end side and bus side.
8. cyclization fixed value adjusting check method as claimed in claim 6 is it is characterised in that in described step 123, cyclization point two
Side phase angle difference obtains cyclization phase angle difference definite value plus Phase margin；Described Phase margin takes 5 °.
9. cyclization fixed value adjusting check method as claimed in claim 1 is it is characterised in that the definite value verification packet of described step 2
Include: in power system simulation software, arrange extra-high-voltage alternating current before cyclization by the voltage difference definite value and phase angle difference definite value of above-mentioned determination
System operation mode, and involutive ring operation carries out simulation calculation, extra high voltage line percussion power during analysis cyclization and power train
System stable case.
If 10. cyclization fixed value adjusting check method as claimed in claim 9 is it is characterised in that extra-high line ball during cyclization
It is stable that road percussion power leads to power system to lose, then the fixed value adjusting of return to step 1, and equal proportion reduces cyclization voltage difference and phase
Angular difference definite value；
For new cyclization definite value, re-start definite value and check, and analyze power system stability situation；
Repeat to check and adjust, until Loop Closing Operation system stability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610798807.3A CN106372331A (en) | 2016-08-31 | 2016-08-31 | Loop closing fixed value setting and checking method of ultra-high voltage alternating-current system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610798807.3A CN106372331A (en) | 2016-08-31 | 2016-08-31 | Loop closing fixed value setting and checking method of ultra-high voltage alternating-current system |
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| CN106372331A true CN106372331A (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610798807.3A Pending CN106372331A (en) | 2016-08-31 | 2016-08-31 | Loop closing fixed value setting and checking method of ultra-high voltage alternating-current system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199366A (en) * | 2017-12-06 | 2018-06-22 | 国网北京市电力公司 | Circuit Loop Closing Operation method and apparatus |
| CN109193920A (en) * | 2018-09-26 | 2019-01-11 | 云南电网有限责任公司电力科学研究院 | A kind of cyclization tune electric control system and method based on controllable inductor |
-
2016
- 2016-08-31 CN CN201610798807.3A patent/CN106372331A/en active Pending
Non-Patent Citations (2)
| Title |
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| 任大伟等: "浙北—福州特高压交流输电工程系统调试中电网运行方式的调整", 《电网技术》 * |
| 任大伟等: "皖电东送工程系统调试中电网运行方式的调整", 《电网技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199366A (en) * | 2017-12-06 | 2018-06-22 | 国网北京市电力公司 | Circuit Loop Closing Operation method and apparatus |
| CN109193920A (en) * | 2018-09-26 | 2019-01-11 | 云南电网有限责任公司电力科学研究院 | A kind of cyclization tune electric control system and method based on controllable inductor |
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