CN105743086A - Determination method for high frequency generator tripping scheme of hierarchical aggregation external transmission grid power - Google Patents
Determination method for high frequency generator tripping scheme of hierarchical aggregation external transmission grid power Download PDFInfo
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Abstract
The invention provides a determination method for a high frequency generator tripping scheme of a hierarchical aggregation external transmission grid power. The method comprises steps that a district high frequency generator tripping scheme C1 for solving a high frequency problem during district grid power splitting in a regional grid power is set; a high frequency generator tripping participation scheme C2 is set for the regional grid power for cooperatively solving a high frequency problem during splitting of a provincial grid power of the regional grid power and other grid powers; a high frequency generator tripping scheme C3 is set for the regional grid power for solving a high frequency problem during splitting of the regional grid power and a main grid power of the regional grid power of the regional grid power; the district high frequency generator tripping scheme C1, the high frequency generator tripping participation scheme C2 and the high frequency generator tripping scheme C3 are verified and corrected. Through the method, segmental setting for start generator tripping frequency constant values of the high frequency generator tripping scheme of the hierarchical aggregation external transmission grid power is carried out, so the different generator tripping schemes are effectively prevented from generating interference when splitting high frequency faults in different levels occur, and thereby coordination among the different generator tripping schemes for solving different high frequency problems is guaranteed.
Description
Technical field
A kind of method that the present invention relates to power system safety and stability control field, collects the defining method of the high-frequency cutting machine scheme sending type electrical network outside in particular to a kind of layering.
Background technology
For the safety that load is powered by guarantee, the security and stability control problem of area power grid is just increasingly subject to pay attention to.It is the class area power grid form that some provinces that water resource is abundant exist that layering collects the type electrical network of sending outside, relatively the Hydropower Unit dispersion of low capacity accesses different electric pressure (such as 110kV/220kV/500kV), and the rich electric power outside satisfied local load is outer after collecting step by step delivers to major network.Such area power grid faces the high frequency problem of 3 aspects:
(1) the high frequency problem after the section grid disconnection of local relative low voltage grade；
(2) the high frequency problem after the major network off-the-line of area power grid and place provincial power network；
(3) high frequency problem when this area's electrical network is positioned at sending end when major network generation off-the-line fault.
In prior art, lack and consider the layering of this 3 class high frequency problem as a whole and collect and send type power grid high-frequency cutting machine scheme defining method outside, have impact on effective performance of the high frequency control ability of area power grid.
Accordingly, it is desirable to provide the layering of a kind of improvement collects the defining method of the high-frequency cutting machine scheme sending type electrical network outside.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, the present invention provides a kind of layering to collect the defining method of the high-frequency cutting machine scheme sending type electrical network outside.
Realizing the solution that above-mentioned purpose adopts is:
A kind of layering collects the defining method of the high-frequency cutting machine scheme sending type electrical network outside, and it thes improvement is that: said method comprising the steps of:
When I, the section grid disconnection arranging within area power grid, the section high-frequency cutting machine scheme C of the internal high frequency problem occurred of described area power grid reply1；
When II, the provincial power network arranging described area power grid place and other grid disconnections, described area power grid assists the high-frequency cutting machine of the high frequency problem of reply provincial power network generation to participate in scheme C2；
III, when the major network off-the-line of described area power grid and place provincial power network is set, the high-frequency cutting machine scheme C of the high frequency problem that the reply of described area power grid occurs3；
IV, verification also revise described section high-frequency cutting machine scheme C1, described high-frequency cutting machine participate in scheme C2With described high-frequency cutting machine scheme C3。
Further, described step I comprises the following steps:
The high-frequency cutting machine scheme C of high frequency problem when S101, the i-th section grid disconnection determining within described area power grid1i, i=1,2,3 ... n；
S102, determine described section high-frequency cutting machine scheme C1=C11∪C12…C1n。
Further, described step S101 includes:
S1011, determine the high-frequency cutting machine scheme C of high frequency problem during described section grid disconnection1iStartup cut unit frequency definite value
S1012, determine described in cut machine point setS1iFor the unit set in the electrical network of section；
S1013, determine described power grid high-frequency cutting machine scheme C1iCut wheel time for 2-4 wheel；
S1014, according to the maximum online power P of section electrical networkupC1imax, it is determined that cut machine total amount 0.8PupC1imax≤PC1i≤PupC1imax。
Further, described step II comprises the following steps:
S201, determine described high-frequency cutting machine participate in scheme C2Startup cut unit frequency definite value 50.5Hz < fC2< 51.5Hz；
S202, determine described in cut machine point setS2For the unit set that the main grid structure of this area's electrical network accesses；
S203, determine described high-frequency cutting machine participate in scheme C2Cut wheel time for 1-3 wheel；
S204, determine and cut machine total amount PC2≤PS, PSFor the unit capacity sum that the main grid structure of area power grid accesses.
Further, described step III comprises the following steps:
S301, determine that the increasing of area power grid is joined and cut machine scheme C3a；
S302, determine described high-frequency cutting machine scheme C3=C1∪C2∪C3a；
Wherein, C1The section high-frequency cutting machine scheme of high frequency problem, C during section grid disconnection within described area power grid2Assist the high-frequency cutting machine of high frequency problem when the provincial power network tackling described area power grid place and other grid disconnections to participate in scheme, C for described area power grid3aJoin for the increasing of described area power grid and cut machine scheme；
S303, according to the maximum online power P of area power gridupC3maxThe high-frequency cutting machine scheme C of area power grid is set3Machine of cutting total amount PC3: 0.8PupC3max≤PC3≤PupC3max。
Further, described step S301 includes:
S3011, described area power grid increasing join and cut machine scheme C3aStart and cut unit frequency definite value 52Hz≤fC3a≤54Hz；
S3012, determine and cut machine point setWherein, S2For the unit set that the main grid structure of this area's electrical network mounts, SC2Scheme C is participated in for described high-frequency cutting machine2Machine of cutting some set；
S3013, determine that described increasing is joined and cut machine scheme C3aCut wheel time for 2-4 wheel.
Further, in described step IV, for described layering collect the type electrical network of sending outside set up big mode in summer, summer little mode, winter big mode and winter little mode emulation data, as checking and revise the emulation platform of described high-frequency cutting machine scheme.
Further, in described step IV, the section grid disconnection in area power grid, area power grid off-the-line, provincial power network off-the-line 3 class fault disturbance form are set, with the transient state highest frequency f of electrical network after off-the-lineh, transient state low-limit frequency fl, steady frequency f after disturbanceSThe reference index checked as high-frequency cutting machine scheme and revise；
Further, in described step IV, when satisfying condition: fh< 55Hz&fl> 49Hz&49.5Hz < fs< 50.5Hz, fhFor transient state highest frequency, flFor transient state low-limit frequency, fSFor the steady frequency after disturbance, it is determined that it is good that layering collects the high-frequency cutting machine scheme works sending type electrical network outside, otherwise judges poor effect, is modified.
Further, described correction includes: for the described section power grid high-frequency cutting machine scheme C of described area power grid1, described area power grid when assisting provincial power network and other grid disconnections tackling described area power grid place the high-frequency cutting machine of high frequency problem participate in scheme C2, described area power grid reply area power grid and place provincial power network major network off-the-line time high frequency problem high-frequency cutting machine scheme C3, in given adjusting range, be sequentially adjusted in startup cut unit frequency definite value, cut machine point set, cut wheel time, cut machine total amount, the scheme after adjusting is carried out emulation again and checks, until determine respond well till.
Compared with immediate prior art, the method have the advantages that
1, layering is collected the startup of the high-frequency cutting machine scheme sending type electrical network outside and cuts unit frequency definite value and carried out sectional setting by method provided by the invention, when realizing generation area power grid place provincial power network off-the-line fault, only area power grid assists the high-frequency cutting machine tackling this problem to participate in scheme action, the high-frequency cutting machine scheme of area power grid internal reply section off-the-line fault and area power grid are tackled its high-frequency cutting machine scheme with provincial power network off-the-line fault and are all failure to actuate, when effectively prevent generation various level off-the-line high frequency fault, difference cuts the interference between machine scheme, ensure that the harmony between machine of the cutting scheme of the different high frequency problem of reply.
2, method provided by the invention by collecting machine of the cutting point of the high-frequency cutting machine scheme sending type electrical network outside, cutting wheel time and cut the reasonable setting of machine amount to layering, achieve high-frequency cutting machine scheme and the method for operation and off-the-line pattern are had good adaptability, improve the effectiveness that electrical network controls at high frequency state of emergency lower frequency.
The advantages such as 3, method provided by the invention has Consideration comprehensively, simple to operation, have higher practical value and good market prospect.
Accompanying drawing explanation
Fig. 1 is the flow chart of the defining method that a kind of layering collects the high-frequency cutting machine scheme sending type electrical network outside in the present embodiment；
Fig. 2 is that in the present embodiment, a kind of layering collects the structural relation schematic diagram sending type electrical network outside.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Collecting in layering sends outside under the major network generation off-the-line fault disturbance of the section electrical network and described area power grid generation off-the-line fault, described area power grid place provincial power network and other electrical network generation off-the-line faults, described area power grid and place provincial power network within type electrical network, change in oscillation can be there is in the frequency of described area power grid, if it is bigger that off-the-line section sends power outside, frequency can seriously be ascended to heaven, and threatens the safety of generating set and electrical equipment.Therefore, it is necessary to take effective high-frequency cutting machine measure at sending end electrical network, reduce frequency and ascend to heaven degree, and avoid cutting that machine amount is excessive makes frequency excessively lower.
For the problems referred to above, the present invention provides a kind of layering to collect the defining method of the high-frequency cutting machine scheme sending type electrical network outside.
As it is shown in figure 1, Fig. 1 is the flow chart of the defining method that a kind of layering collects the high-frequency cutting machine scheme sending type electrical network outside in the present embodiment；The defining method of this high-frequency cutting machine scheme comprises the following steps:
When step one, the section grid disconnection arranging within area power grid, the section high-frequency cutting machine scheme C of the internal high frequency problem occurred of described area power grid reply1；
When step 2, the provincial power network arranging described area power grid place and other grid disconnections, described area power grid assists the high-frequency cutting machine of the high frequency problem of reply provincial power network generation to participate in scheme C2；
Other electrical networks described refer to the external electrical network by exchanging or DC line is connected of the provincial power network with area power grid place.
Step 3, when the major network off-the-line of described area power grid and place provincial power network is set, the high-frequency cutting machine scheme C of the high frequency problem that the reply of described area power grid occurs3；
Step 4, verification also revise described section high-frequency cutting machine scheme C1, described high-frequency cutting machine participate in scheme C2With described high-frequency cutting machine scheme C3。
In step one, comprise the following steps:
The high-frequency cutting machine scheme C of high frequency problem during section grid disconnection within S101, described area power grid1i, i=1,2,3 ... n；
S102, assume that area power grid total n sends matrix district electrical network outside, the section power grid high-frequency cutting machine scheme C of area power grid1These sections should be contained, it is determined that described section high-frequency cutting machine scheme C1=C11∪C12…C1n。
Described step S101 includes:
S1011, determine the high-frequency cutting machine scheme C of high frequency problem during described section grid disconnection1iStartup cut unit frequency definite value fC1i,
S1012, determine described in cut machine point setS1iFor the unit set in the electrical network of section；
S1013, determine described power grid high-frequency cutting machine scheme C1iCut wheel time for 2-4 wheel；
S1014, according to the maximum online power P of section electrical networkupC1imaxDetermine and cut machine total amount PC1i: 0.8PupC1imax≤PC1i≤PupC1imax。
In step 2, arrange area power grid assist reply provincial power network generation off-the-line fault and this area's electrical network be positioned at high frequency problem during provincial power network sending end high-frequency cutting machine participate in scheme C2.Comprise the following steps:
S201, determine described high-frequency cutting machine participate in scheme C2Startup cut unit frequency definite value 50.5Hz < fC2< 51.5Hz；
S202, determine and cut machine point setS2For the unit set that the main grid structure of this area's electrical network accesses；
S203, determine area power grid assist provincial power network high-frequency cutting machine participate in scheme high-frequency cutting machine participate in scheme C2Cut wheel time for 1-3 wheel；
S204, cut machine total amount PC2Less than the unit capacity sum P that the main grid structure of area power grid accessesS, namely can determine that and cut machine total amount PC2≤PS。
In step 3, the high-frequency cutting machine scheme C of high frequency problem when area power grid reply area power grid is set with major network off-the-line3, including 3 parts, C3=C1∪C2∪C3a；
Wherein, C1The section high-frequency cutting machine scheme of high frequency problem, C during the section grid disconnection tackling within electrical network for described area power grid2Assist the high-frequency cutting machine of high frequency problem when the provincial power network tackling described area power grid place and other grid disconnections to participate in scheme, C for described area power grid3aJoin for the increasing of described area power grid and cut machine scheme.
The increasing of area power grid is joined and is cut machine scheme C3aDetermination include:
S3011, determine that the increasing of described area power grid is joined and cut machine scheme C3aStart and cut unit frequency definite value 52Hz≤fC3a≤54Hz；
S3012, determine and cut machine point setWherein, S2For the unit set that the main grid structure of this area's electrical network mounts, SC2Scheme C is participated in for described high-frequency cutting machine2Machine of cutting some set；
S3013, determine that described increasing is joined and cut machine scheme C3aCut wheel time for 2-4 wheel.
Finally, according to the maximum online power P of area power gridupC3maxThe high-frequency cutting machine scheme C of area power grid is set3Machine of cutting total amount PC3: 0.8PupC3max≤PC3≤PupC3max。
In step 4, the layering for research collects and sends type electrical network outside, sets up 4 set exemplary simulation data, namely big mode in summer, summer little mode, winter big mode, winter little mode emulation data, the emulation platform checked as high-frequency cutting machine scheme and revise.
Section grid disconnection in area power grid, area power grid off-the-line, provincial power network off-the-line 3 class fault disturbance form are set, with the transient state highest frequency f of electrical network after off-the-lineh, transient state low-limit frequency fl, steady frequency f after disturbances, as the reference index of the check of high-frequency cutting machine scheme and correction.
3 condition: f are met when simultaneouslyh< 55Hz, fl> 49Hz, 49.5Hz < fs< 50.5Hz, it is determined that it is good that this layering collects the high-frequency cutting machine scheme works sending type electrical network outside, otherwise judges poor effect, it is necessary to be modified.
Described correction refers to, collects, in layering, the high-frequency cutting machine scheme sending type electrical network outside and determines improperly in situation, for the section power grid high-frequency cutting machine scheme C of area power grid1, area power grid assist reply provincial power network generation off-the-line fault and this area's electrical network be positioned at high frequency problem during provincial power network sending end high-frequency cutting machine participate in scheme C2, area power grid reply area power grid and place provincial power network major network off-the-line time high frequency problem high-frequency cutting machine scheme C3, adjust in given adjusting range, be sequentially adjusted in startup and cut unit frequency definite value, cut machine point set, cut wheel time, cut machine total amount, the scheme after adjusting is carried out emulation again and checks, till configuration is good.
According to said method, collect, in conjunction with a domestic layering, the example that is configured to sending type power grid high-frequency cutting machine scheme outside and be described further.Layering collect send type electrical network outside structural relation as shown in Figure 2.
The water resource of this area's electrical network is enriched, and relatively the Hydropower Unit dispersion of low capacity accesses 110kV/220kV/500kV electric pressure, and the rich electric power outside satisfied local load is outer after collecting step by step delivers to major network.
Area power grid installed capacity is about 3855MW, and there are 3 section electrical networks sending type outside inside, is 1 section, 2 sections and 3 sections, and area power grid sends power outside to provincial power network, and provincial power network sends power outside further to other electrical networks.
This area's electrical network faces the high frequency problem of 3 aspects:
(1) the high frequency problem after 3 section grid disconnections of local；
(2) the high frequency problem after the major network off-the-line of area power grid and place provincial power network；
(3) high frequency problem when this area's electrical network is positioned at sending end when provincial power network generation off-the-line fault.
Formulate high-frequency cutting machine scheme to comprise the following steps:
When step one, the section grid disconnection arranging within area power grid, the section high-frequency cutting machine scheme C of the internal high frequency problem occurred of area power grid reply1。
Described section power grid high-frequency cutting machine scheme C1Including 3 parts: 3 high-frequency cutting machine scheme C sent outside during matrix district electrical network off-the-line respectively11、C12And C13, it is configured respectively as shown in table 1 to table 3.
1 section high-frequency cutting machine scheme is set to 3 and takes turns, and cuts machine initiation culture value respectively 52Hz, 52.3Hz, 52.8Hz, cuts machine total amount PC11For 98.5MW, for the maximum online power P of section electrical networkupC11max0.86 times.
The high-frequency cutting machine scheme C of table 11 section11
2 section high-frequency cutting machine schemes are set to 3 and take turns, and cut machine initiation culture value respectively 52Hz, 52.3Hz, 53.5Hz, cut machine total amount PC12For 127.1MW, for the maximum online power P of section electrical networkupC12max0.83 times.
The high-frequency cutting machine scheme C of table 22 section12
3 section high-frequency cutting machine schemes are set to 2 and take turns, and cut machine initiation culture value respectively 52Hz, 53.5Hz, cut machine total amount PC13For 149.5MW, for the maximum online power P of section electrical networkupC13max0.99 times.
The high-frequency cutting machine scheme C of table 33 section13
In step 2, when arranging provincial power network and other grid disconnections at area power grid place, area power grid assists the high-frequency cutting machine of the high frequency problem of reply provincial power network generation to participate in scheme C2, as shown in table 4 below, it is set to 3 and takes turns, cut machine initiation culture value respectively 50.6Hz, 50.7Hz, 50.8Hz, cut machine total amount PC2For 725MW.
Table 4 area power grid assists the high-frequency cutting machine of provincial power network to participate in scheme C2
In step 3, when the major network off-the-line of area power grid and place provincial power network is set, the high-frequency cutting machine scheme C of the high frequency problem that area power grid reply occurs3, C3=C1∪C2∪C3a, wherein, C1For the section power grid high-frequency cutting machine scheme of area power grid, C2When for area power grid assistance reply provincial power network generation off-the-line fault, this area's electrical network is positioned at provincial power network sending end, the high-frequency cutting machine of high frequency problem participates in scheme, C3aJoin for the increasing of area power grid and cut machine scheme.
The increasing of area power grid is joined and is cut machine scheme C3aArrange as shown in table 5 below, be set to 2 and take turns, cut machine initiation culture value respectively 52Hz, 52.8Hz, cut machine total amount PC3aFor 510MW.
The high-frequency cutting machine scheme C of high frequency problem when area power grid reply area power grid is with major network off-the-line3Machine of cutting amount PC3Calculating formula be:For 1610MW, for the maximum online power P of area power gridupC3max0.92 times.
High-frequency cutting machine when table 5 area power grid and major network off-the-line increases formula case C3a
In step 4, the layering for research collects and sends type electrical network outside, sets up 4 set exemplary simulation data, namely big mode in summer, summer little mode, winter big mode, winter little mode data, the emulation platform checked as high-frequency cutting machine scheme and revise.Table 6 gives the flow situations that exemplary simulation mode data area power grid is relevant.
The flow situations that table 6 exemplary simulation mode data area power grid is relevant
| Mode | Exert oneself (MW) | Load (MW) | Area power grid sends power (MW) outside |
| Summer big mode | 2558 | 770 | 1747 |
| Summer little mode | 2344 | 721 | 1618 |
| Winter big mode | 2085 | 744 | 1329 |
| Winter little mode | 1666 | 761 | 929 |
Section grid disconnection in area power grid, area power grid off-the-line, provincial power network off-the-line 3 class fault disturbance form are set, with the transient state highest frequency f of electrical network after off-the-lineh, transient state low-limit frequency fl, steady frequency f after disturbances, as the reference index of the check of high-frequency cutting machine scheme and correction.
Simulation result meets 3 Rule of judgment: f simultaneouslyh< 55Hz, fl> 49Hz, 49.5Hz < fs< 50.5Hz, therefore, it is determined that layering to collect the high-frequency cutting machine arrangements sending type electrical network outside good, it is not necessary to further revise.
Finally should be noted that: above example is merely to illustrate the technical scheme of the application but not the restriction to its protection domain; although with reference to above-described embodiment to present application has been detailed description; those of ordinary skill in the field are it is understood that the detailed description of the invention of application still can be carried out all changes, amendment or equivalent replacement by those skilled in the art after reading the application; but these change, revise or equivalent replacement, all within the claims that application is awaited the reply.
Claims (10)
1. a layering collects the defining method of the high-frequency cutting machine scheme sending type electrical network outside, it is characterised in that: said method comprising the steps of:
When I, the section grid disconnection arranging within area power grid, the section high-frequency cutting machine scheme C of the internal high frequency problem occurred of described area power grid reply1；
When II, the provincial power network arranging described area power grid place and other grid disconnections, described area power grid assists the high-frequency cutting machine of the high frequency problem of reply provincial power network generation to participate in scheme C2；
III, when the major network off-the-line of described area power grid and place provincial power network is set, the high-frequency cutting machine scheme C of the high frequency problem that the reply of described area power grid occurs3；
IV, verification also revise described section high-frequency cutting machine scheme C1, described high-frequency cutting machine participate in scheme C2With described high-frequency cutting machine scheme C3。
2. a kind of layering as claimed in claim 1 collects the defining method of the high-frequency cutting machine scheme sending type electrical network outside, it is characterised in that: described step I comprises the following steps:
The high-frequency cutting machine scheme C of high frequency problem when S101, the i-th section grid disconnection determining within described area power grid1i, i=1,2,3 ... n；
S102, determine described section high-frequency cutting machine scheme C1=C11∪C12…C1n。
3. a kind of layering as claimed in claim 1 collects the defining method of the high-frequency cutting machine scheme sending type electrical network outside, it is characterised in that: described step S101 includes:
S1011, determine the high-frequency cutting machine scheme C of high frequency problem during described section grid disconnection1iStartup cut unit frequency definite value
S1012, determine described in cut machine point setS1iFor the unit set in the electrical network of section；
S1013, determine described power grid high-frequency cutting machine scheme C1iCut wheel time for 2-4 wheel；
S1014, according to the maximum online power P of section electrical networkupC1imax, it is determined that cut machine total amount 0.8PupC1imax≤PC1i≤PupC1imax。
4. a kind of layering as claimed in claim 1 collects the defining method of the high-frequency cutting machine scheme sending type electrical network outside, it is characterised in that: described step II comprises the following steps:
S201, determine described high-frequency cutting machine participate in scheme C2Startup cut unit frequency definite value 50.5Hz < fC2< 51.5Hz；
S202, determine described in cut machine point setS2For the unit set that the main grid structure of this area's electrical network accesses；
S203, determine described high-frequency cutting machine participate in scheme C2Cut wheel time for 1-3 wheel；
S204, determine and cut machine total amount PC2≤PS, PSFor the unit capacity sum that the main grid structure of area power grid accesses.
5. a kind of layering as claimed in claim 1 collects the defining method of the high-frequency cutting machine scheme sending type electrical network outside, it is characterised in that: described step III comprises the following steps:
S301, determine that the increasing of area power grid is joined and cut machine scheme C3a；
S302, determine described high-frequency cutting machine scheme C3=C1∪C2∪C3a；
Wherein, C1The section high-frequency cutting machine scheme of high frequency problem, C during section grid disconnection within described area power grid2Assist the high-frequency cutting machine of high frequency problem when the provincial power network tackling described area power grid place and other grid disconnections to participate in scheme, C for described area power grid3aJoin for the increasing of described area power grid and cut machine scheme；
S303, according to the maximum online power P of area power gridupC3maxThe high-frequency cutting machine scheme C of area power grid is set3Machine of cutting total amount PC3: 0.8PupC3max≤PC3≤PupC3max。
6. a kind of layering as claimed in claim 5 collects the defining method of the high-frequency cutting machine scheme sending type electrical network outside, it is characterised in that: described step S301 includes:
S3011, described area power grid increasing join and cut machine scheme C3aStart and cut unit frequency definite value 52Hz≤fC3a≤54Hz；
S3012, determine and cut machine point setWherein, S2For the unit set that the main grid structure of this area's electrical network mounts, SC2Scheme C is participated in for described high-frequency cutting machine2Machine of cutting some set；
S3013, determine that described increasing is joined and cut machine scheme C3aCut wheel time for 2-4 wheel.
7. a kind of layering as claimed in claim 1 collects the defining method of the high-frequency cutting machine scheme sending type electrical network outside, it is characterized in that: in described step IV, for described layering collect the type electrical network of sending outside set up big mode in summer, summer little mode, winter big mode and winter little mode emulation data, as checking and revise the emulation platform of described high-frequency cutting machine scheme.
8. a kind of layering as claimed in claim 7 collects the defining method of the high-frequency cutting machine scheme sending type electrical network outside, it is characterized in that: in described step IV, section grid disconnection in area power grid, area power grid off-the-line, provincial power network off-the-line 3 class fault disturbance form are set, with the transient state highest frequency f of electrical network after off-the-lineh, transient state low-limit frequency fl, steady frequency f after disturbanceSThe reference index checked as high-frequency cutting machine scheme and revise.
9. a kind of layering as claimed in claim 8 collects the defining method of the high-frequency cutting machine scheme sending type electrical network outside, it is characterised in that: in described step IV, when satisfying condition: fh< 55Hz&fl> 49Hz&49.5Hz < fs< 50.5Hz, fhFor transient state highest frequency, flFor transient state low-limit frequency, fSFor the steady frequency after disturbance, it is determined that it is good that layering collects the high-frequency cutting machine scheme works sending type electrical network outside, otherwise judges poor effect, is modified.
10. a kind of layering as claimed in claim 9 collects the defining method of the high-frequency cutting machine scheme sending type electrical network outside, it is characterised in that: described correction includes: for the described section power grid high-frequency cutting machine scheme C of described area power grid1, described area power grid when assisting provincial power network and other grid disconnections tackling described area power grid place the high-frequency cutting machine of high frequency problem participate in scheme C2, described area power grid reply area power grid and place provincial power network major network off-the-line time high frequency problem high-frequency cutting machine scheme C3, in given adjusting range, be sequentially adjusted in startup cut unit frequency definite value, cut machine point set, cut wheel time, cut machine total amount, the scheme after adjusting is carried out emulation again and checks, until determine respond well till.
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| CN106505569A (en) * | 2016-12-28 | 2017-03-15 | 云南电力调度控制中心 | A kind of method that asynchronous sending end provincial power network high-frequency cutting machine strategy is formulated in analysis |
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