CN105932707B - DC engineering control method and system - Google Patents
DC engineering control method and system Download PDFInfo
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- 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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Abstract
The present invention provides a kind of DC engineering control method and system, according to the division state of receiving end AC system change of current bus-tie circuit breaker, identify the method for operation of DC engineering, the mode of electric current is controlled to realize the transmission of dc power in DC engineering, to increase the monopole power control mode of DC engineering, according to the method for operation, determine that DC engineering control mode is bipolar power control model, monopole power control mode and monopolar current control model or is monopole power control mode and monopolar current control model.It in whole process, identified by the DC engineering method of operation, increase monopole power control mode, specify power transmission control model so that the three kinds of method of operation transmission powers requirements of DC engineering control mode while satisfaction.
Description
Technical field
The present invention relates to electric power network technical field, more particularly to DC engineering control method and system.
Background technology
D.C. high voltage transmission is with no induction reactance using stable DC, and capacitive reactance does not work yet, no stationary problem etc.
Advantage and the high-power remote direct current transportation used.Electricity transmission process is direct current, and advantage is increased without the capacity of short circuit of system
It is easy to implement the networking of the non-synchronous networking operation of two large power systems and the electric system of different frequency；Utilize DC engineering
Algorithm for power modulation can improve the damping of electric system, power oscillation damping, improve the ability to transmit electricity of the AC power line of paired running.
With the development of science and technology, HVDC Transmission Technology is more and more at present is applied in electric power network, but at present
For some special circumstances application HVDC Transmission Technologies, still there are some problems and difficulty.
By taking some DC engineering as an example, need power being delivered to A power grids and/or B power grids in the DC engineering, wherein inverse
Become station 500kV alternating-current fields and increase special switchgear distribution, two breakers on ac bus 1M and 2M are installed respectively, are being connect
Enter to install two respectively in two outlets of A power grids every knife.By to 1#, 2#, 3#, 4# breaker and 1#, 2# disconnecting switch
Operation, you can realize three kinds of different methods of operation, i.e. power " sending A power grids entirely ", power " sending B power grids entirely ", power " send A in pole 1
B power grids are sent in power grid, pole 2 ".At present, existing DC engineering control technology can not meet above-mentioned three kinds of methods of operation conveying work(simultaneously
Rate requirement.
Invention content
Based on this, it is necessary to can not meet three kinds of method of operation transmission powers simultaneously for existing DC engineering control technology
The problem of, a kind of DC engineering control method and system are provided, three kinds of method of operation transmission powers can be met simultaneously.
A kind of DC engineering control method, including step：
According to the division state of receiving end AC system change of current bus-tie circuit breaker in DC engineering, the operation side of DC engineering is identified
Formula；
The mode of electric current in DC engineering is controlled to realize the transmission of dc power in DC engineering, to increase DC engineering
Monopole power control mode；
According to the method for operation, determine DC engineering control mode for bipolar power control model, monopole power control mode
With monopolar current control model or it is monopole power control mode and monopolar current control model.
A kind of DC engineering control system, including：
Method of operation identification module, for the division shape according to receiving end AC system change of current bus-tie circuit breaker in DC engineering
State identifies the method for operation of DC engineering；
Control function increases module, and dc power in DC engineering is realized for controlling the mode of electric current in DC engineering
Transmission, to increase the monopole power control mode of DC engineering；
Control model determining module, for according to the method for operation, determining that DC engineering control mode is controlled for bipolar power
Pattern, monopole power control mode and monopolar current control model control mould for monopole power control mode and monopolar current
Formula.
DC engineering control method and system of the present invention, according to the division state of receiving end AC system change of current bus-tie circuit breaker,
It identifies the method for operation of DC engineering, controls the mode of electric current to realize the transmission of dc power in DC engineering, it is straight to increase
Flow the monopole power control mode of engineering, according to the method for operation, determine DC engineering control mode for bipolar power control model,
Monopole power control mode is with monopolar current control model or is monopole power control mode and monopolar current control model.Entirely
In the process, by the DC engineering method of operation identify, increase monopole power control mode, specify power transmission control model so that
DC engineering control mode meets three kinds of method of operation transmission power requirements simultaneously.
Description of the drawings
Fig. 1 is the flow diagram of DC engineering control method one embodiment of the present invention；
Fig. 2 is the flow diagram of second embodiment of DC engineering control method of the present invention；
Fig. 3 is the structure diagram of DC engineering control system one embodiment of the present invention；
Fig. 4 is the structure diagram of second embodiment of DC engineering control system of the present invention.
Specific embodiment
As shown in Figure 1, a kind of DC engineering control method, including step：
S200：According to the division state of receiving end AC system change of current bus-tie circuit breaker in DC engineering, DC engineering is identified
The method of operation.
The method of operation of DC engineering including power be all conveyed to the first power grid, power be all conveyed to the second power grid with
And power section is conveyed to the first power grid and part is conveyed to the second power grid.Herein, according to receiving end exchange system in DC engineering
It unites the division state of change of current bus-tie circuit breaker, identifies the method for operation of DC engineering, i.e., power send the first power grid, power to send the entirely entirely
Two power grids are that power sends the first power grid and the second power grid.
S400：The mode of electric current in DC engineering is controlled to realize the transmission of dc power in DC engineering, it is straight to increase
Flow the monopole power control mode of engineering.
Specifically, the method for increasing the monopole power control mode of DC engineering is to adjust the monopole power of setting
Value, monopole power elevation rate are converted into current ration and slope rate, and direct current is realized in the way of electric current is controlled
The transmission of power.Monopole power setting valve, monopole power elevation rate can manually, automatically enter and (passed by the direct current finished in advance
Defeated power day or week or monthly load curve), and in power lifting process, can stop/continuing the lifting of power at any time.This
A little input values can the needs based on historical empirical data, expert database or practical application scene and set.
S600：According to the method for operation, determine DC engineering control mode for bipolar power control model, monopole power control
Pattern is with monopolar current control model or is monopole power control mode and monopolar current control model.
For the different methods of operation, DC engineering control mode is divided into bipolar power control model, monopole power control
Pattern is with monopolar current control model or is monopole power control mode and monopolar current control model.
DC engineering control method of the present invention, according to the division state of receiving end AC system change of current bus-tie circuit breaker, identification is straight
The method of operation of engineering is flowed, controls the mode of electric current to realize the transmission of dc power in DC engineering, to increase DC engineering
Monopole power control mode, according to the method for operation, determine DC engineering control mode for bipolar power control model, monopole work(
Rate control model is with monopolar current control model or is monopole power control mode and monopolar current control model.Whole process
In, it identified by the DC engineering method of operation, increase monopole power control mode, specify power transmission control model so that direct current
Engineering Control mode meets three kinds of method of operation transmission power requirements simultaneously
As shown in Fig. 2, step S600 includes in one of the embodiments,：
S620：When the method for operation send the first power grid or power to send the second power grid entirely entirely for power, DC engineering controlling party
Formula is bipolar power control model, monopole power control mode and monopolar current control model.
Power send the first power grid or send under the second power grid mode entirely entirely, and three kinds of control models may be selected in DC engineering, bipolar
Power control mode, monopole power control mode and monopolar current control model.If the two poles of the earth are set to monopolar current control
Molding formula or the operation of monopole power control mode, then bipolar mutual indepedent operation, control system respectively ensure to flow through this pole direct current
The electric current or power of busbar are setting value；If a pole monopolar current control model operation, a pole monopole power control mode
Operation, then bipolar mutual indepedent operation, the electric current that the pole of monopolar current control model operation ensures to flow through this pole dc bus are
Setting value, the pole of monopole power control mode operation ensure the performance number that the power of this pole conveying is setting；An if electrode current
Control model or the operation of monopole power control mode, a pole bipolar power control model operation, then monopolar current control model or
The pole of monopole power control mode operation ensures that it is setting value to flow through the electric current of this pole dc bus or power, and bipolar power controls
The pole of mode operation ensures bipolar transmission power and for setting bipolar power value.
S640：When the method for operation sends the first power grid and power part the second power grid of dispensing for power part, DC engineering control
Mode processed is monopole power control mode and monopolar current control model.
One pole power of bipolar operation send the first power grid, a pole power to send under the second power grid mode, and DC engineering may be selected two
Kind control model：Monopole power control mode, monopolar current control model.If the two poles of the earth are set to monopolar current control model
Or the operation of monopole power control mode, then bipolar mutual indepedent operation, control system respectively ensure to flow through this pole dc bus
Electric current or power be setting value；If an extremely monopolar current control model is run, an extremely monopole power control mode is transported
Row, then bipolar mutual indepedent operation, the electric current that the pole of monopolar current control model operation ensures to flow through this pole dc bus are
Setting value, the pole of monopole power control mode operation ensure the performance number that the power of this pole conveying is setting.
As shown in Fig. 2, it is further included after step S400 in one of the embodiments,：
S500：According to the method for operation, optimize the stability contorting function of DC engineering.
For the stability contorting function of DC engineering rationally, effectively optimize, so that DC engineering control technology more has
Effect meets three kinds of method of operation transmission power requirements simultaneously.Specifically, entire optimization carries out in terms of following three：First,
Bilateral frequency difference modulation function PSS/PSD is only applicable to the DC online method of operation, and bilateral is automatically exited under decoupled mode
Frequency difference modulation function, when networking operation bipolar the first power grid of drop point, automatically exit from bilateral frequency difference modulation function, one pole of networking operation
The bilateral frequency difference modulation function of the first power grid of drop point pole is automatically exited from when the first power grid of drop point, pole second power grid of drop point.Second,
Frequency limit function FLC full load current is separately configured by pole, can be thrown and moved back by operations staff, networking, isolated island side are distinguished in frequency dead band
Formula can be adjusted individually, be automatically switched according to isolated island/networking signals.Third, power limit, power return drop, power carries
Function bipole arrangement is risen, power send to throw under the first power grid mode and move back entirely, and power send the second power grid, power to send the first power grid entirely
With do not consider under the second power grid mode power limit, power return drop, power ascension function.
The mode of electric current in DC engineering is controlled to realize dc power in DC engineering in one of the embodiments,
Transmission, is included with increasing the step of the monopole power control mode of DC engineering：
The monopole power setting valve set in DC engineering is converted into current ration, and the list that will be set in DC engineering
Pole power elevation rate is converted into slope rate, to increase the monopole power control mode of DC engineering.
As shown in figure 3, a kind of DC engineering control system, including：
Method of operation identification module 200, for the division according to receiving end AC system change of current bus-tie circuit breaker in DC engineering
State identifies the method for operation of DC engineering；
Control function increases module 400, and direct current in DC engineering is realized for controlling the mode of electric current in DC engineering
The transmission of power, to increase the monopole power control mode of DC engineering；
Control model determining module 600, for according to the method for operation, it to be bipolar power control to determine DC engineering control mode
Molding formula, monopole power control mode and monopolar current control model control mould for monopole power control mode and monopolar current
Formula.
DC engineering control system of the present invention, method of operation identification module 200 are opened according to receiving end AC system change of current busbar
The division state of pass, identifies the method for operation of DC engineering, and control function increases module 400 and controls the mode of electric current to realize directly
The transmission of dc power in engineering is flowed, to increase the monopole power control mode of DC engineering, control model determining module 600
According to the method for operation, it is bipolar power control model, monopole power control mode and monopolar current to determine DC engineering control mode
Control model is monopole power control mode and monopolar current control model.In whole process, pass through DC engineering operation side
Formula identification increases monopole power control mode, specifies power transmission control model so that DC engineering control mode meets simultaneously
Three kinds of method of operation transmission power requirements
As shown in figure 4, DC engineering control system further includes in one of the embodiments,：
Optimization module 500, for according to the method for operation, optimizing the stability contorting function of DC engineering.
Control function increase module 400 is specifically used for the monopole that will be set in DC engineering in one of the embodiments,
Power setting valve is converted into current ration, and the monopole power elevation rate set in DC engineering is converted into slope speed
Rate, to increase the monopole power control mode of DC engineering.
The method of operation of DC engineering send the first power grid or power to send entirely entirely including power in one of the embodiments,
Two power grids or power part send the first power grid and power part sends the second power grid.
As shown in figure 4, control model determining module 600 includes in one of the embodiments,：
First determination unit 620, for when the method for operation for power the first power grid or power is sent to send the second power grid entirely full when,
DC engineering control mode is bipolar power control model, monopole power control mode and monopolar current control model
Second determination unit 640 sends the first power grid and the second electricity of power part dispensing for working as the method for operation for power part
During net, DC engineering control mode is monopole power control mode and monopolar current control model.
In order to further explain in detail the technical solution of DC engineering control method and system of the present invention and it brings
Effect, will explain in detail DC engineering of the present invention control by taking DC engineering elder generation Guangxi and/or Yunnan transmission power as an example below
Method and system is how to realize while meet three kinds of method of operation transmission powers to require.
Step 1：Increase by three kinds of method of operation identification functions, according to the division shape of receiving end AC system change of current bus-tie circuit breaker
State identifies the method for operation of DC engineering, i.e. power send Guangxi, power that Yunnan or power is sent to send Guangxi and Yunnan entirely entirely.
Step 2：The method for increasing monopole power control mode is by the monopole power setting valve of setting, monopole power liter
Reduction of speed rate is converted into current ration and slope rate, and the transmission of dc power is realized in the way of electric current is controlled.It is single
Pole power setting valve, monopole power elevation rate can manually, automatically enter (by the direct current transmission power day finished in advance or week or
Monthly load curve), and in power lifting process, can stop/continuing the lifting of power at any time.
Step 3：Optimize stability contorting function in DC engineering, specifically optimized in terms of following three：1) bilateral frequency
Poor modulation function PSS/PSD is only applicable to the DC online method of operation, and bilateral frequency difference tune is automatically exited under decoupled mode
Function processed, when networking operation bipolar drop point Guangxi, automatically exit from bilateral frequency difference modulation function, one pole drop point Guangxi of networking operation, one
The bilateral frequency difference modulation function of drop point Guangxi pole is automatically exited from during the drop point Yunnan of pole；2) frequency limit function FLC full load current presses pole
Be separately configured, can by operations staff throw move back, frequency dead band distinguish networking, isolated island mode, can individually adjust, according to isolated island/
Networking signals are automatically switched；3) power limit, power return drop, power ascension function bipole arrangement, and power send Guangxi side entirely
It can throw and move back under formula, power is sent entirely does not consider that power limit, power return drop, power under Yunnan, power dispensing Guangxi and Yunnan mode
Enhanced feature.
Step 4：According to the method for operation, determine DC engineering control mode for bipolar power control model, monopole power control
Molding formula is with monopolar current control model or is monopole power control mode and monopolar current control model.
1) power send Guangxi or send under the mode of Yunnan entirely entirely, and three kinds of control models, bipolar power control may be selected in DC engineering
Molding formula, monopole power control mode and monopolar current control model.If the two poles of the earth are set to monopolar current control model
Or the operation of monopole power control mode, then bipolar mutual indepedent operation, control system respectively ensure to flow through this pole dc bus
Electric current or power be setting value；If a pole monopolar current control model operation, a pole monopole power control mode operation, then
Bipolar mutual indepedent operation, the pole of monopolar current control model operation ensure that the electric current for flowing through this pole dc bus is setting value,
The pole of monopole power control mode operation ensures the performance number that the power of this pole conveying is setting；An if electrode current control model
Or monopole power control mode is run, a pole bipolar power control model is run, then monopolar current control model or monopole power
The pole of control model operation ensures that it is setting value to flow through the electric current of this pole dc bus or power, and bipolar power control model is run
Pole ensure bipolar transmission power and for setting bipolar power value.
2) one pole power of bipolar operation send Guangxi, a pole power to send under the mode of Yunnan, and two kinds of controls may be selected in DC engineering
Pattern：Monopole power control mode, monopolar current control model.If the two poles of the earth are set to monopolar current control model or monopole
Power control mode is run, then bipolar mutual indepedent operation, control system respectively ensures to flow through the electric current of this pole dc bus
Or power is setting value；If an extremely monopolar current control model is run, an extremely monopole power control mode is run, then double
Extremely operation independently of each other, the pole of monopolar current control model operation ensure that the electric current for flowing through this pole dc bus is setting value,
The pole of monopole power control mode operation ensures the performance number that the power of this pole conveying is setting.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that those of ordinary skill in the art are come
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (6)
1. a kind of DC engineering control method, which is characterized in that including step：
According to the division state of receiving end AC system change of current bus-tie circuit breaker in DC engineering, the operation side of the DC engineering is identified
Formula, the method for operation of the DC engineering send that the first power grid or power send the second power grid entirely or power part sends the including power entirely
One power grid and power part the second power grid of dispensing；
The mode of electric current in the DC engineering is controlled to realize the transmission of dc power in the DC engineering, with described in increase
The monopole power control mode of DC engineering；
When the method for operation send the first power grid or power to send the second power grid entirely entirely for power, the DC engineering control mode
For bipolar power control model, monopole power control mode and monopolar current control model；
When the method for operation sends the first power grid and power part the second power grid of dispensing for power part, the DC engineering control
Mode is monopole power control mode and monopolar current control model.
2. DC engineering control method according to claim 1, which is characterized in that electricity in the control DC engineering
The mode of stream realizes the transmission of dc power in the DC engineering, to increase the monopole power control mould of the DC engineering
It is further included after the step of formula：
According to the method for operation, optimize the stability contorting function of the DC engineering.
3. DC engineering control method according to claim 1, which is characterized in that electricity in the control DC engineering
The mode of stream realizes the transmission of dc power in the DC engineering, to increase the monopole power control mould of the DC engineering
The step of formula, includes：
The monopole power setting valve set in the DC engineering is converted into current ration, and will be set in the DC engineering
Monopole power elevation rate be converted into slope rate, to increase the monopole power control mode of the DC engineering.
4. a kind of DC engineering control system, which is characterized in that including：
Method of operation identification module for the division state according to receiving end AC system change of current bus-tie circuit breaker in DC engineering, is known
The method of operation of not described DC engineering, the method for operation of the DC engineering send the first power grid or power to send entirely entirely including power
Second power grid or power part send the first power grid and power part sends the second power grid；
Control function increases module, and direct current in the DC engineering is realized for controlling the mode of electric current in the DC engineering
The transmission of power, to increase the monopole power control mode of the DC engineering；
Control model determining module, for according to the method for operation, it to be bipolar power to determine the DC engineering control mode
Control model, monopole power control mode and monopolar current control model are controlled for monopole power control mode and monopolar current
Pattern；The control model determining module includes the first determination unit and the second determination unit, and first determination unit is used for
When the method for operation send the first power grid or power to send the second power grid entirely entirely for power, the DC engineering control mode is double
Pole power control mode, monopole power control mode and monopolar current control model；Second determination unit is used for when described
When the method for operation sends the first power grid and power part the second power grid of dispensing for power part, the DC engineering control mode is monopole
Power control mode and monopolar current control model.
5. DC engineering control system according to claim 4, which is characterized in that further include：
Optimization module, for according to the method for operation, optimizing the stability contorting function of the DC engineering.
6. DC engineering control system according to claim 4, which is characterized in that it is specific that the control function increases module
For the monopole set in the DC engineering power setting valve to be converted into current ration, and will be set in the DC engineering
Monopole power elevation rate be converted into slope rate, to increase the monopole power control mode of the DC engineering.
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| CN101297449A (en) * | 2006-01-18 | 2008-10-29 | Abb技术有限公司 | A transmission system |
| CN103956727A (en) * | 2014-06-03 | 2014-07-30 | 南京南瑞继保电气有限公司 | Modulated power distribution method with auxiliary direct current control function |
| CN104052077A (en) * | 2014-07-04 | 2014-09-17 | 南京南瑞继保电气有限公司 | Direct-current transmission contravariant side frequency control method |
| CN105449680A (en) * | 2015-12-01 | 2016-03-30 | 许继电气股份有限公司 | Automatic control method for monopole power in power distributed running mode |
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- 2016-06-02 CN CN201610392322.4A patent/CN105932707B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101297449A (en) * | 2006-01-18 | 2008-10-29 | Abb技术有限公司 | A transmission system |
| CN103956727A (en) * | 2014-06-03 | 2014-07-30 | 南京南瑞继保电气有限公司 | Modulated power distribution method with auxiliary direct current control function |
| CN104052077A (en) * | 2014-07-04 | 2014-09-17 | 南京南瑞继保电气有限公司 | Direct-current transmission contravariant side frequency control method |
| CN105449680A (en) * | 2015-12-01 | 2016-03-30 | 许继电气股份有限公司 | Automatic control method for monopole power in power distributed running mode |
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Effective date of registration: 20210601 Address after: 510700 3rd, 4th and 5th floors of building J1 and 3rd floor of building J3, No.11 Kexiang Road, Science City, Luogang District, Guangzhou City, Guangdong Province Patentee after: China Southern Power Grid Research Institute Co.,Ltd. Address before: 510080 water Donggang 8, Dongfeng East Road, Yuexiu District, Guangzhou, Guangdong. Patentee before: CSG POWER GRID TECHNOLOGY RESEARCH CENTER Patentee before: China Southern Power Grid Research Institute Co.,Ltd. |