CN105656086A - Overload processing method - Google Patents
Overload processing method Download PDFInfo
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- CN105656086A CN105656086A CN201510845467.0A CN201510845467A CN105656086A CN 105656086 A CN105656086 A CN 105656086A CN 201510845467 A CN201510845467 A CN 201510845467A CN 105656086 A CN105656086 A CN 105656086A
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Abstract
The invention relates to an overload processing method. The method comprises the following steps of determining an overload line; establishing a bus domain which needs to be examined; establishing a transformer domain which needs to be examined; establishing an output set domain needing to rise; dividing a generator set in the output set domain needing to rise into generator set groups with different adjusting sensitivity grades; when an overload quantity satisfies a condition that delta L is greater than or equal to S1+S2+...+ Si+...+SK and is less than or equal to S1+S2+...+ Si+...+SK+SK+1, and the generator set group with a K+1th adjusting sensitivity grade to the generator set group with the highest adjusting sensitivity grade are in an overflow output state, determining whether the overload quantity is reduced to 0; when the overload quantity is reduced to 0, successively overflowing the output of the generator set groups whose adjusting sensitivity grades are greater than k, and calculating the at least required number of the overflow output generator set groups making the overload quantity be reduced to 0; and generating first prompt information. In the invention, minimum output rise amounts of the generator set group needing to be in an overflow state and the generator set group with a K+jth adjusting sensitivity grade are returned to scheduling personnel; the scheduling personnel carries out operation on the correlation generator set groups so as to eliminate the overload quantity and danger brought by equipment overload.
Description
Technical field
The present invention relates to a kind of overload treatment process.
Background technology
After electrical equipment fault in electrical network trips, it is possible to cause relevant circuit or transformer overload. Need dispatcher to adjust relevant plant stand operation scheme in time when circuit and transformer transship, eliminate overload, otherwise structure deteriorate can be caused, expand accident impact.
Overcurrent is generally dispatched by current dispatcher according to experience, and this sample loading mode needs dispatcher to have very abundant working experience, just can carry out rationally, dispatch accurately. It is therefore desirable to provide the aid decision-making method of a kind of fast processing apparatus overload, for accident treatment provides abundant warning information or information accurately, general dispatcher can dispatch according to information, reduce or eliminate harm or impact that overload is brought, to promote the Ability of emergency management to electric network fault.
Summary of the invention
Technical problem to be solved by this invention how to provide the information eliminating overload conditions fast when accident treatment.
For solving the problems of the technologies described above, the present invention proposes overload treatment process, overload treatment process provided by the invention comprises circuit overload treatment process, and described circuit overload treatment process comprises:
S1, determine overload circuit;
S2, each the bus flowed into along 220KV network topology circuit by the electric current in described overload circuit are as examining or check bus, and foundation need to examine or check bus territory;
S3, described need to examine or check the direct-connected transformer of bus and using the opposite end transformer of line change group form outlet as examining or check transformer, foundation need to examine or check transformer territory by each;
S4, foundation need to swell power unit territory, and the process of establishing that described need swell power unit territory comprises:
Need to examining or check in all generating set that bus connects described, whether all connection topological paths judged between each described generating set and the need examination bus being connected this generating set all do not comprise described overload circuit,
If then this generating set being included in described need and swelling power unit territory;
Otherwise, utilize Load flow calculation module judge this generating set exert oneself rise full time, whether the mistake carrying capacity of described overload circuit reduces; Cross carrying capacity if described to reduce, then this generating set is included in described need and swells power unit territory;
S5, the generating set swelled by described need in power unit territory are according to the generating set group regulating sensitivity to be divided into different grades;
Wherein, the adjustment sensitivity of each generating set is determined by the electric distance between this generating set and the need examination bus of direct-connected described overload circuit;
S6, meet S at the mistake carrying capacity �� L of described overload circuit1+S2+��+Si+��+SK�ܦ�L��S1+S2+��+Si+��+SK+SK+1Time, K+1 is to when regulating the highest generating set group of sensitivity level all to exert oneself to rise full to utilize Load flow calculation module to judge, described crosses whether carrying capacity �� L is reduced to 0, SiIt it is the upper reserve level of the generating set group of the i-th adjustment sensitivity level;
S7, judge described cross carrying capacity �� L be reduced to 0 time, from being low to moderate, the high order full adjustment sensitivity level that rises successively is greater than the exerting oneself of generating set group of k according to regulating sensitivity level to utilize Load flow calculation module, calculates and makes described to cross the minimum required number j of full generating set group of rising that exerts oneself that carrying capacity �� L is reduced to 0;
S8, utilize Load flow calculation module calculate when K+1 to K+j-1 regulate sensitivity level generating set group exert oneself rise full, when making carrying capacity �� L be reduced to 0, K+j regulated the minimum load amount of rising of the generating set group of sensitivity level, and K+j is less than or equals the maximum regulating sensitivity level;
S9, generating the first information, described first information comprises: exert oneself rise full and K+j of the generating set group of the 1st to K+j-1 adjustment sensitivity level regulates the described minimum load amount of rising of generating set group of sensitivity level.
Optionally, described circuit overload treatment process also comprises:
�� L >=S is met at the described carrying capacity �� L that crosses1+S2+��+SmTime, generating the 2nd information, described 2nd information comprises: all generating set that described need swell in power unit territory are exerted oneself and all risen completely;
Wherein, m is the maximum regulating sensitivity level.
Optionally, described circuit overload treatment process also comprises:
If utilizing described Load flow calculation module to judge not to be reduced to 0 at K+1 to the carrying capacity �� L that crosses described when regulating the generating set group that sensitivity level is the highest all to rise full, then generating the 3rd information, described 3rd information comprises: all generating set that described need swell in power unit territory are exerted oneself and all risen completely.
Optionally, the computation process of the described minimum load amount of rising comprises:
When K+1 to K+j-1 regulate the generating set group of sensitivity level exert oneself rise full, increase, according to default step-length, the exerting oneself of generating set group that K+j regulates sensitivity level;
When increasing n described default step-length, the described carrying capacity �� L that crosses is not reduced to 0, and when increasing n+1 described default step-length, the described carrying capacity �� L that crosses is reduced to 0, then the described minimum load amount of rising is the product of described default step-length and n+1.
Optionally, S is met at the described carrying capacity �� L that crosses1+S2+��+Si+��+SK�ܦ�L��S1+S2+��+Si+��+SK+SK+1When, utilize described Load flow calculation module to judge not to be reduced to 0 or meet �� L >=S at the described carrying capacity �� L that crosses at K+1 to the carrying capacity �� L of mistake described when regulating the highest generating set group of sensitivity level all to rise full1+S2+��+SmWhen, described circuit overload treatment process also comprises:
Bus territory (B need to be examined or check for described1,B2��Bi��Bn) in any one need to examine or check bus BiAffiliated substation, performs following step:
Described the 220kV bus A outside bus territory need to be examined or check when also comprising in this substation1, bus A1With need to examine or check bus BiBetween be non-Electromagnetic coupling mode, and when the first switch is in hot stand-by duty, when utilizing described Load flow calculation module judge at closed described first switch and disconnect the 2nd switch, whether the mistake carrying capacity of described overload circuit reduces or eliminates,
Described cross carrying capacity reduce or eliminate time, generate the 4th information, described 4th information comprises: closed described first switch, and disconnects described 2nd switch;
Wherein, described first switch is bus A1With need to examine or check bus BiBetween bus connection switch or section switch, described 2nd switch is direction of tide is that inflow need to examine or check bus BiConnection line on line switch, and this connection line need to examine or check bus with another and be connected.
Optionally, S is met at the described carrying capacity �� L that crosses1+S2+��+Si+��+SK�ܦ�L��S1+S2+��+Si+��+SK+SK+1When, utilize described Load flow calculation module to judge not to be reduced to 0 or meet �� L >=S at the described carrying capacity �� L that crosses at K+1 to the carrying capacity �� L of mistake described when regulating the highest generating set group of sensitivity level all to rise full1+S2+��+SmWhen, described circuit overload treatment process also comprises:
Bus territory (B need to be examined or check for described1,B2��Bi��Bn) in any one need to examine or check bus BiAffiliated substation, performs following step:
When the 3rd switch is in hot stand-by duty, then, when utilizing Load flow calculation module judge at closed described 3rd switch and disconnect the 4th switch, whether the mistake carrying capacity of described overload circuit reduces or eliminates;
Described cross carrying capacity reduce or eliminate time, generate the 5th information, described 5th information comprises: closed described 3rd switch, and disconnects described 4th switch;
Wherein, described 3rd switch is for need to examine or check bus BiSupply lead on line switch, this supply lead refers to need to examine or check bus B for describediThere is provided the circuit of power supply, and this supply lead does not need examination bus B with described need to examination in bus territoryiOutside other need to examine or check bus connect; Described 4th switch is direction of tide is that inflow need to examine or check bus BiConnection line on line switch, and this connection line need to examine or check bus with another and be connected.
Optionally, S is met at the described carrying capacity �� L that crosses1+S2+��+Si+��+SK�ܦ�L��S1+S2+��+Si+��+SK+SK+1When, utilize described Load flow calculation module to judge not to be reduced to 0 or meet �� L >=S at the described carrying capacity �� L that crosses at K+1 to the carrying capacity �� L of mistake described when regulating the highest generating set group of sensitivity level all to rise full1+S2+��+SmWhen, described circuit overload treatment process also comprises:
Transformer territory (T need to be examined or check for described1,T2��Ti��Tn) in arbitrary need to examine or check transformer TiAffiliated substation, performs following step:
When being connected by the 7th switch between the bus that the bus that the 5th switch connects is connected with the 6th switch, when described 7th switch is in hot stand-by duty, described 6th switch is in running status, the electric current flowing through described 6th switch is greater than 0, and the transformer belonging to described 6th switch is described need to examine or check the transformer C outside transformer territory1Time, when utilizing Load flow calculation module judge at closed described 7th switch and disconnect described 5th switch, whether the mistake carrying capacity of described overload circuit reduces or eliminates;
Cross carrying capacity reduce if described or eliminate, and be non-Electromagnetic coupling mode between the bus that is connected with the 9th switch of the bus connected when the 8th switch, and the 8th the tenth switch between the bus that is connected with the 9th switch of the bus that connects of switch when being in hot stand-by duty, generate the 6th information, described 6th information comprises: first closed described tenth switch and disconnection the 11 switch, then close described 7th switch and disconnect described 5th switch, finally close described 11 switch and disconnect described tenth switch;
Cross carrying capacity reduce if described or eliminate, and when the bus that the bus that the 8th switch connects is connected with the 9th switch be Electromagnetic coupling mode or for same article of bus time, generating the 7th information, described 7th information comprises: closes described 7th switch and disconnects described 5th switch;
Wherein, described 5th switch is for need to examine or check transformer TiOn middle pressure by master switch or low pressure by master switch, described 6th switch is described transformer C1On middle pressure by master switch or low pressure by master switch, described 7th switch and described tenth switch are bus connection switch or section switch, and the 8th switch is described need to examine or check transformer TiOn high pressure by master switch, described 9th switch is described transformer C1On high pressure by master switch, described 11 switch is the line switch that described 8th switch is connected on the supply lead of bus, and this supply lead refers to the circuit of the bus offer power supply connected for described 8th switch.
Optionally, the present invention transship treatment process also comprise transformer overload treatment process, described transformer overload treatment process comprise:
S1 ', determine overload transformer D1;
When connecting 14 switch between the bus that S2 ', the bus connected in duodecimo pass are connected with the 13 switch, when described 14 switch is in hot stand-by duty, described 13 switch is in running status, and the electric current flowing through described 13 switch is when being greater than 0, when utilizing described Load flow calculation module judge closed described 14 switch and disconnect described duodecimo pass, whether the mistake carrying capacity of described overload transformer reduces or eliminates;
Cross carrying capacity reduce if described or eliminate, and the bus connected when the 15 switch to close with sixteenmo between the bus being connected be non-Electromagnetic coupling mode, and the 17 switch that closes between the bus being connected with described sixteenmo of the bus that connects of described 15 switch is when being in hot stand-by duty, generate the 8th information, described 8th information comprises: first closed described 17 switch and disconnection the 18 switch, then close described 14 switch and disconnect described duodecimo and close, finally disconnect described 17 switch and closed described 18 switch,
Cross carrying capacity reduce if described or eliminate, and close the bus being connected when the bus that the 15 switch connects and sixteenmo be Electromagnetic coupling mode or during for same article of bus, generating the 9th information, described 9th information comprises: closes described 14 switch and disconnects described duodecimo and closes;
Wherein, described duodecimo is closed as described overload transformer D1On middle pressure by master switch or low pressure by master switch, described 13 switch is another transformer E1On middle pressure by master switch or low pressure by master switch, described 14 switch and described 17 switch are bus connection switch or section switch, and described 15 switch is described overload transformer D1On high pressure by master switch, described sixteenmo closes as E1On high pressure by master switch, the bus that described 18 switch connects for described 15 switch for referring to provides the circuit of power supply.
In overload treatment process provided by the invention, Load flow calculation module is utilized to be exerted oneself by part or all of generating set group full simulation of rising, and then determine to rise full generating set group and K+j regulates the minimum load amount of rising of generating set group of sensitivity level, and these information are back to dispatcher. Dispatcher is to the operation of relevant generating set, and then eliminates carrying capacity, thus eliminates harm or impact that overload is brought. Dispatcher, according to information provided by the invention, operates accordingly, promotes the Ability of emergency management to electric network fault.
Accompanying drawing explanation
By reference to accompanying drawing can the characteristic information of understanding the present invention clearly and advantage, accompanying drawing is schematic and should not be construed as and the present invention carries out any restriction, in the accompanying drawings:
Fig. 1 shows and transships the schematic flow sheet for the treatment of process one embodiment according to the present invention;
Fig. 2 shows and transships the structural representation being adopted circuit in treatment process one embodiment according to the present invention;
Fig. 3 shows and transships the structural representation being adopted circuit in another embodiment for the treatment of process according to the present invention;
Fig. 4 shows and transships treatment process according to the present invention and adopted again the structural representation of circuit in an embodiment;
Fig. 5 shows and transships treatment process according to the present invention and adopted again the structural representation of circuit in an embodiment;
Fig. 6 shows and transships treatment process according to the present invention and adopted again the structural representation of circuit in an embodiment.
Embodiment
In order to more clearly understand above-mentioned purpose, the feature and advantage of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail. It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understanding the present invention; but; the present invention can also adopt other to be different from other modes described here to implement, and therefore, protection scope of the present invention is by the restriction of following public specific embodiment.
The present invention provides a kind of overload treatment process, and the method comprises circuit overload treatment process, namely occurs this circuit overload treatment process to be adopted to process during overload at circuit.
As shown in Figure 1, described circuit overload treatment process comprises:
S1, determine overload circuit;
S2, each the bus flowed into along 220KV network topology circuit by the electric current in described overload circuit are as examining or check bus, and foundation need to examine or check bus territory;
Such as, as shown in Figure 2, L1 is overload circuit, the electric current inflow bus B in overload circuit L11, then enter bus B through circuit L22, then enter bus B through circuit L33, it is seen that the electric current in overload circuit has flowed into bus B1, bus B2, bus B3, bus B1, bus B2, bus B3The load bus being overload circuit L1, includes in need to examine or check bus territory as examining or check bus.
S3, described need to examine or check the direct-connected transformer of bus and using the opposite end transformer of line change group form outlet as examining or check transformer, foundation need to examine or check transformer territory by each;
Such as, as shown in Figure 2, bus B1The transformer connected is T1, bus B2The transformer connected is T2, bus B3The transformer connected is T3, transformer T1, transformer T2, transformer T3The load transformer of equal load circuit, includes in need to examine or check transformer territory as examining or check transformer. In addition, due to the restriction of the factors such as cost, not each transformer is connected on bus, but with general connection, the electric current of these transformers, also likely from overload circuit, therefore also needs to be flow out to examine or check on the circuit of bus the transformer connected and include in and need to examine or check transformer territory by direction of tide.
S4, foundation need to swell power unit territory, and the process of establishing that described need swell power unit territory comprises:
Need to examining or check in all generating set that bus connects described, whether all connection topological paths judged between each described generating set and the need examination bus being connected this generating set all do not comprise described overload circuit,
If then this generating set being included in described need and swelling power unit territory;
Otherwise, utilize Load flow calculation module judge this generating set exert oneself rise full time, whether the mistake carrying capacity of described overload circuit reduces; Cross carrying capacity if described to reduce, then this generating set is included in described need and swells power unit territory;
What be understood that is, connection topological path between generating set and the need examination bus being connected this generating set has many, when these connection topological paths comprise overload circuit, it is seen that have relation between this generating set and overload circuit, therefore included in and need to swell power unit territory. And when these connection topological paths do not comprise overload circuit, utilize whether Load flow calculation module simulation generating set overload conditions when rising full of exerting oneself takes a turn for the better, prove that when taking a turn for the better the improvement of overload conditions is helpful by this generating set, therefore included in and need to swell power unit territory.
So-called Load flow calculation module is module conventional in electrical network. Load flow calculation is the operational conditions according to given electric network composition, parameter and the element such as generator, load, it is determined that the calculating of power system each several part steady-state operating condition parameter. Usually given operational conditions has the voltage and phasing degree etc. of the power of each power supply and load point in system, pivot point voltage, trim point.
S5, the generating set swelled by described need in power unit territory are according to the generating set group regulating sensitivity to be divided into different grades;
Wherein, the adjustment sensitivity of each generating set is determined by the electric distance between this generating set and the need examination bus of direct-connected described overload circuit;
Assume to swell power unit territory for (G1,G2��Gu), regulate sensitivity level to be divided into 1,2 ... m, need to swell power unit territory and can represent and be: { (G1,��Gi)1,(Gi+1,��Gj)2,��,(Gk+1,��Gu)m. Wherein, G1,��Gi)1It is the 1st generating set group regulating sensitivity level, the upper reserve level S of this generating set group1Represent, (Gk+1,��Gu)mFor the generating set group regulating sensitivity level the highest, the upper reserve level S of this generating set groupmRepresent.
S6, meet S at the mistake carrying capacity �� L of described overload circuit1+S2+��+Si+��+SK�ܦ�L��S1+S2+��+Si+��+SK+SK+1Time, K+1 is to when regulating the highest generating set group of sensitivity level all to exert oneself to rise full to utilize Load flow calculation module to judge, described crosses whether carrying capacity �� L is reduced to 0, SiIt it is the upper reserve level of the generating set group of the i-th adjustment sensitivity level;
S7, described cross carrying capacity �� L be reduced to 0 time, from being low to moderate, the high order full adjustment sensitivity level that rises successively is greater than the exerting oneself of generating set group of k according to regulating sensitivity level to utilize Load flow calculation module, calculates and makes described to cross the minimum required number j of full generating set group of rising that exerts oneself that carrying capacity �� L is reduced to 0;
In the step s 7, calculate and make described to cross the minimum required number j of full generating set group of rising that exerts oneself that carrying capacity �� L is reduced to 0, such as, if K+1 regulates the generating set group of sensitivity level to exert oneself when rising full, cross carrying capacity �� L and be reduced to 0, then j is 1. If K+1 regulates the generating set group of sensitivity level to exert oneself when rising full, cross carrying capacity �� L and be not reduced to 0, but when K+2 regulate the generating set group of sensitivity level exert oneself also rise full time, mistake carrying capacity �� L is reduced to 0, then j is 2.
S8, utilize Load flow calculation module calculate when K+1 to K+j-1 regulate sensitivity level generating set group exert oneself rise full, when making carrying capacity �� L be reduced to 0, K+j regulated the minimum load amount of rising of the generating set group of sensitivity level, and K+j is less than or equals the maximum regulating sensitivity level;
S9, generating the first information, described first information comprises: exert oneself rise full and K+j of the generating set group of the 1st to K+j-1 adjustment sensitivity level regulates the described minimum load amount of rising of generating set group of sensitivity level;
Step S7 calculates j, step S8 calculates the minimum load amount of rising of generating set group that K+j regulates sensitivity level, and step S9 need to rise by full generating set group and K+j regulates the minimum load amount of rising of generating set group of sensitivity level to feed back to dispatcher. Relevant generating set can be operated by dispatcher, and then eliminated carrying capacity, thus eliminates harm or impact that overload is brought.
In the specific implementation, described circuit overload treatment process also can comprise:
�� L >=S is met at the described carrying capacity �� L that crosses1+S2+��+SmTime, generating the 2nd information, described 2nd information comprises: all generating set that described need swell in power unit territory are exerted oneself and all risen completely;
Wherein, m is the maximum regulating sensitivity level.
It is understood that, when crossing carrying capacity �� L >=S1+S2+��+Si+��+SmTime, carrying capacity exceed described need swell the upper for subsequent use of all generators in power unit territory and, no matter now crossing carrying capacity �� L to be greater than 10% or be less than 10%, all needing that described need are swelled all generator outputs in power unit territory and rising full, to reduce carrying capacity.
In the specific implementation, described circuit overload treatment process also can comprise:
Described step S6 utilize Load flow calculation module judge not to be reduced to 0 at K+1 to the carrying capacity �� L that crosses described when regulating the generating set group that sensitivity level is the highest all to rise full, then generating the 3rd information, described 3rd information comprises: all generating set that described need swell in power unit territory are exerted oneself and all risen completely.
It is understood that, although �� L meets S1+S2+��+Si+��+SK�ܦ�L��S1+S2+��+Si+��+SK+SK+1Time, but when K+1 to K+m regulates the generating set group of sensitivity level all to rise full, cross carrying capacity and it is not reduced to 0 yet, illustrated that carrying capacity was very big, all generating set that now need to swell in power unit territory are exerted oneself and are all risen completely, to reduce carrying capacity.
In the specific implementation, the computation process of the described minimum load amount of rising can comprise:
When K+1 to K+j-1 regulate the generating set group of sensitivity level exert oneself rise full, increase, according to default step-length, the exerting oneself of generating set group that K+j regulates sensitivity level;
When increasing n described default step-length, the described carrying capacity �� L that crosses is not reduced to 0, and when increasing n+1 described default step-length, the described carrying capacity �� L that crosses is reduced to 0, then the described minimum load amount of rising is the product of described default step-length and n+1.
Such as, default step-length be 20MW, K+j regulate the generating set group of sensitivity level exert oneself when having risen by 2 step-lengths, cross carrying capacity �� L and be not reduced to 0. But when risen 3 step-lengths time, cross carrying capacity �� L be reduced to 0, then the minimum load amount of rising is 3*20MW=60MW.
In the specific implementation, S is met at the described carrying capacity �� L that crosses1+S2+��+Si+��+SK�ܦ�L��S1+S2+��+Si+��+SK+SK+1When, utilize described Load flow calculation module to judge not to be reduced to 0 or meet �� L >=S at the described carrying capacity �� L that crosses at K+1 to the carrying capacity �� L of mistake described when regulating the highest generating set group of sensitivity level all to rise full1+S2+��+SmWhen, described circuit overload treatment process also can comprise:
Bus territory (B need to be examined or check for described1,B2��Bi��Bn) in any one need to examine or check bus BiAffiliated substation, performs following step:
Described the 220kV bus A outside bus territory need to be examined or check when also comprising in this substation1, bus A1With need to examine or check bus BiBetween be non-Electromagnetic coupling mode, and when the first switch is in hot stand-by duty, when utilizing described Load flow calculation module judge at closed described first switch and disconnect the 2nd switch, whether the mistake carrying capacity of described overload circuit reduces or eliminates,
Described cross carrying capacity reduce or eliminate time, generate the 4th information, described 4th information comprises: closed described first switch, and disconnects described 2nd switch;
Wherein, described first switch is bus A1With need to examine or check bus BiBetween bus connection switch or section switch, described 2nd switch is direction of tide is that inflow need to examine or check bus BiConnection line on line switch, and this connection line need to examine or check bus with another and be connected.
It is described with the schematic circuit shown in Fig. 3 below:
First switch is QF1, and the 2nd switch is QF2, and inflow need to examine or check bus B1Circuit for overload circuit L1. Generally, owing to the first switch QF1 is in hot stand-by duty, therefore bus A1In electric current can not flow into and need to examine or check bus B1, and the 2nd switch QF2 is closed state, need to examine or check bus B1It is power by circuit L4, therefore needs examination bus B1For the load bus of circuit L4.When circuit overload, utilizing Load flow calculation module simulation first switch QF1 to close, the 2nd switch QF2 disconnects, and like this, need to examine or check bus B1Can by bus A1Power supply, need to examine or check bus B to ensure1On load normally run. Owing to now needing examination bus B1No longer need overload circuit L1 to power, therefore can reduce or eliminate the desirable load of overload circuit.
It should be appreciated that direction of tide is inflow need to examine or check bus BiConnection line not necessarily transship circuit, other general circuit can also, the electric current therefore transshipped in circuit is entered by this connection line to examine or check bus Bi.
In the specific implementation, S is met at the described carrying capacity �� L that crosses1+S2+��+Si+��+SK�ܦ�L��S1+S2+��+Si+��+SK+SK+1When, utilize described Load flow calculation module to judge not to be reduced to 0 or meet �� L >=S at the described carrying capacity �� L that crosses at K+1 to the carrying capacity �� L of mistake described when regulating the highest generating set group of sensitivity level all to rise full1+S2+��+SmWhen, described circuit overload treatment process also can comprise:
Bus territory (B need to be examined or check for described1,B2��Bi��Bn) in any one need to examine or check bus BiAffiliated substation, performs following step:
When the 3rd switch is in hot stand-by duty, then, when utilizing Load flow calculation module judge at closed described 3rd switch and disconnect the 4th switch, whether the mistake carrying capacity of described overload circuit reduces or eliminates;
Described cross carrying capacity reduce or eliminate time, generate the 5th information, described 5th information comprises: closed described 3rd switch, and disconnects described 4th switch;
Wherein, described 3rd switch is for need to examine or check bus BiSupply lead on line switch, this supply lead refers to need to examine or check bus B for describediThere is provided the circuit of power supply, and this supply lead does not need examination bus B with described need to examination in bus territoryiOutside other need to examine or check bus connect; Described 4th switch is direction of tide is that inflow need to examine or check bus BiConnection line on line switch, and this connection line need to examine or check bus with another and be connected.
It is described with the schematic circuit shown in Fig. 4 below:
Bus B need to be examined or check2With need to examine or check bus B3Between is connected by the 4th switch QF4, generally the 4th switch QF4 is hot stand-by duty, and the 3rd switch QF3 is for closing state, and supply lead L2 is for need to examine or check bus B2Electric energy is provided. When circuit overload, utilizing Load flow calculation module simulation the 4th switch QF4 to close, the 3rd switch QF3 disconnects, and like this, need to examine or check bus B2Can by examining or check bus B3Power supply, need to examine or check bus B to ensure2On load normally run. Owing to now needing examination bus B2No longer need circuit L2 to power, due to the electric current that originally transshipped in circuit through circuit L2 be B2Power supply, therefore can reduce or eliminate the desirable load of overload circuit.
In concrete enforcement, meet S at the described carrying capacity �� L that crosses1+S2+��+Si+��+SK�ܦ�L��S1+S2+��+Si+��+SK+SK+1When, utilize described Load flow calculation module to judge not to be reduced to 0 or meet �� L >=S at the described carrying capacity �� L that crosses at K+1 to the carrying capacity �� L of mistake described when regulating the highest generating set group of sensitivity level all to rise full1+S2+��+SmWhen, described circuit overload treatment process also can comprise:
Transformer territory (T need to be examined or check for described1,T2��Ti��Tn) in arbitrary need to examine or check transformer TiAffiliated substation, performs following step:
When being connected by the 7th switch between the bus that the bus that the 5th switch connects is connected with the 6th switch, when described 7th switch is in hot stand-by duty, described 6th switch is in running status, the electric current flowing through described 6th switch is greater than 0, and the transformer belonging to described 6th switch is described need to examine or check the transformer C outside transformer territory1Time, when utilizing Load flow calculation module judge at closed described 7th switch and disconnect described 5th switch, whether the mistake carrying capacity of described overload circuit reduces;
Cross carrying capacity reduce if described or eliminate, and be non-Electromagnetic coupling mode between the bus that is connected with the 9th switch of the bus connected when the 8th switch, and the 8th the tenth switch between the bus that is connected with the 9th switch of the bus that connects of switch when being in hot stand-by duty, generate the 6th information, described 6th information comprises: first closed described tenth switch and disconnection the 11 switch, then close described 7th switch and disconnect described 5th switch, finally close described 11 switch and disconnect described tenth switch;
Cross carrying capacity reduce if described or eliminate, and when the bus that the bus that the 8th switch connects is connected with the 9th switch be Electromagnetic coupling mode or for same article of bus time, generating the 7th information, described 7th information comprises: closes described 7th switch and disconnects described 5th switch;
Wherein, described 5th switch is for need to examine or check transformer TiOn middle pressure by master switch or low pressure by master switch, described 6th switch is described transformer C1On middle pressure by master switch or low pressure by master switch, described 7th switch and described tenth switch are bus connection switch or section switch, and the 8th switch is described need to examine or check transformer TiOn high pressure by master switch, described 9th switch is described transformer C1On high pressure by master switch, described 11 switch is the switch between the bus that connects of described 8th switch and supply lead, and this supply lead refers to that the bus connected for described 8th switch provides the circuit of power supply.
It is described with the schematic circuit shown in Fig. 5 below:
5th switch QF5 is for need to examine or check transformer TiMiddle pressure by master switch or low pressure by master switch, the 6th switch QF6 is transformer C1Middle pressure by master switch or low pressure by master switch, the bus that the bus that the 5th switch QF5 connects is connected with the 6th switch QF6 passes through the 7th switch QF7 and connects, and the 8th switch QF8 is for need to examine or check transformer TiHigh pressure by master switch, the 9th switch QF8 is transformer C1High pressure by master switch, connected by the tenth switch QF10 between the bus that the 8th switch connects and the bus that the 9th switch connects, the 11 switch QF11 is the switch on supply lead L5.
When utilizing the closed 7th switch QF7 of Load flow calculation module simulation and disconnect the 5th switch, if the mistake carrying capacity of overload circuit reduces or eliminates, then the overload conditions that can be improved overload circuit by this method is described. Generally, when on high-tension side switch disconnects, it is the switch not allowing closed low-tension side, therefore here in two kinds of situation:
(1) be hot stand-by duty at the tenth switch QF10, and between the bus that is connected with the 9th switch QF9 of the bus that connects of the 8th switch QF8 for non-Electromagnetic coupling mode time, the high pressure between two transformers is not connected by master switch. Therefore first closed tenth switch QF10 and disconnection the 11 switch QF11, more closed 7th switch QF7 and disconnection the 5th switch QF5, finally closes the 11 switch QF11 and disconnects the tenth switch QF10.
(2) bus being connected with the 9th switch when the bus that the 8th switch connects be Electromagnetic coupling mode or for same article of bus time, the high pressure of two transformers, by being be connected between master switch, is now need closed 7th switch QF7 and disconnect the 5th switch QF5.
As closed 7th switch QF7 and disconnection the 5th switch QF5, the bus being connected with the 6th switch QF6 is the bussed supply being connected with the 5th switch QF5, therefore can reduce or eliminate the desirable load of overload circuit.
In circuit overload treatment process provided by the invention, it is possible to by exerting oneself of the generating set need to examined or check in unit territory is carried out suitable increase, to reduce or eliminate carrying capacity.Switch (switches in schematic circuit as shown in Fig. 3,4,5) in circuit can also be operated, reduce or eliminate the load needing overload circuit to provide. When above various measure or method all can not eliminate circuit overload amount, can only turn shifting and meet, therefore can generating information in this case: adjust transfer load or drawing-path electricity limiting �� LMW, wherein �� L transshipped the power of circuit to subtract the performance number that the rated output of circuit obtains after above various method reduced carrying capacity relevantly.
Certainly, when equipment failure, it is possible to cause circuit overload, it is also possible to cause transformer to transship, therefore overload treatment process provided by the invention also can comprise transformer overload treatment process, and this transformer overload treatment process can comprise:
S1 ', determine overload transformer D1;
When connecting 14 switch between the bus that S2 ', the bus connected in duodecimo pass are connected with the 13 switch, when described 14 switch is in hot stand-by duty, described 13 switch is in running status, and the electric current flowing through described 13 switch is when being greater than 0, when utilizing described Load flow calculation module judge closed described 14 switch and disconnect described duodecimo pass, whether the mistake carrying capacity of described overload transformer reduces or eliminates;
Cross carrying capacity reduce if described or eliminate, and the bus connected when the 15 switch to close with sixteenmo between the bus being connected be non-Electromagnetic coupling mode, and the 17 switch that closes between the bus being connected with described sixteenmo of the bus that connects of described 15 switch is when being in hot stand-by duty, generate the 8th information, described 8th information comprises: first closed described 17 switch and disconnection the 18 switch, then close described 14 switch and disconnect described duodecimo and close, finally disconnect described 17 switch and closed described 18 switch,
Cross carrying capacity reduce if described or eliminate, and close the bus being connected when the bus that the 15 switch connects and sixteenmo be Electromagnetic coupling mode or during for same article of bus, generating the 9th information, described 9th information comprises: closes described 14 switch and disconnects described duodecimo and closes;
Wherein, described duodecimo is closed as described overload transformer D1On middle pressure by master switch or low pressure by master switch, described 13 switch is another transformer E1On middle pressure by master switch or low pressure by master switch, described 14 switch and described 17 switch are bus connection switch or section switch, and described 15 switch is described overload transformer D1On high pressure by master switch, described sixteenmo closes as E1On high pressure by master switch, the bus that described 18 switch connects for described 15 switch for referring to provides the circuit of power supply.
Visible, transformer overload treatment process is similar to the circuit overload treatment process in Fig. 4, is described for Fig. 6 below:
Duodecimo closes QF12 for overload transformer D1Middle pressure by master switch or low pressure by master switch, the 13 switch QF13 is transformer E1Middle pressure by master switch or low pressure by master switch, duodecimo is closed the bus that the bus that QF12 connects is connected with the 13 switch QF13 and is connected by the 14 switch QF14, and the 15 switch QF15 transships transformer D1High pressure by master switch, it is transformer E that sixteenmo closes QF161High pressure by master switch, the bus that the 15 switch QF1 connects and sixteenmo are closed and are connected by the 17 switch QF17 between the bus that QF16 connects, and the 18 switch QF18 is the switch on supply lead L6.
Close QF12 when utilizing the closed 14 switch QF14 of Load flow calculation module simulation and disconnect duodecimo, if the mistake carrying capacity of overload transformer reduces or eliminates, then the overload conditions that can be improved overload transformer by this method is described. Generally, when on high-tension side switch disconnects, it is the switch not allowing closed low-tension side, therefore here in two kinds of situation:
(1) it is hot stand-by duty at the 17 switch QF17, and when the bus that connects of the 15 switch QF15 closes between the bus that QF16 is connected as non-Electromagnetic coupling mode with sixteenmo, the high pressure between two transformers is not connected by master switch. Therefore first closed 17 switch QF17 and disconnection the 18 switch QF18, more closed 14 switch QF14 and disconnection duodecimo close QF12, finally closed 18 switch QF18 and disconnection the 17 switch QF17.
(2) it is Electromagnetic coupling mode or during for same article of bus when the bus that the 15 switch QF15 connects and sixteenmo close the bus that QF16 is connected, the high pressure of two transformers, by being be connected between master switch, now only needs closed 14 switch QF14 and disconnects duodecimo to close QF12.
When closed 14 switch QF14 and disconnection duodecimo close QF12, the bus being connected with the 13 switch QF13 is the bussed supply being connected with duodecimo pass QF12, therefore can reduce or eliminate the desirable load of overload circuit. If not being reduced to 0 by the mistake carrying capacity of the method overload transformer, now can generating information: adjust transfer load or drawing-path electricity limiting �� LMW, wherein �� L reduced through aforesaid method to transship the high-tension side power of transformer after carrying capacity and subtract the performance number that transformer rated output obtains relevantly.
After certain equipment failure is tripped, program can judge whether to have in 220V electrical network the situation of main force's Power Plant band little area independent operating. Concrete determination methods is: if main force's Power Plant cannot find the transformer of any 500kV along 220kV network real-time topology, then be considered as this unit band little area independent operating, and points out supplementary " unit has now been with little area independent operating ".
In addition, program can automatically identify equipment and be in inspecting state, and the shielding warning relevant to this equipment or fault tripping operation information, also can improve state estimation qualification rate while reducing wrong report. Concrete recognition methods is: if monitoring all cutter locks being directly connected with certain equipment be all in a point position, be then in inspecting state depending on this equipment.
Although describing embodiments of the present invention by reference to the accompanying drawings, but those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, such amendment and modification all fall into by within claims limited range.
Claims (8)
1. an overload treatment process, it is characterised in that, comprise circuit overload treatment process, described circuit overload treatment process comprises:
S1, determine overload circuit;
S2, each the bus flowed into along 220KV network topology circuit by the electric current in described overload circuit are as examining or check bus, and foundation need to examine or check bus territory;
S3, described need to examine or check the direct-connected transformer of bus and using the opposite end transformer of line change group form outlet as examining or check transformer, foundation need to examine or check transformer territory by each;
S4, foundation need to swell power unit territory, and the process of establishing that described need swell power unit territory comprises:
Need to examining or check in all generating set that bus connects described, whether all connection topological paths judged between each described generating set and the need examination bus being connected this generating set all do not comprise described overload circuit,
If then this generating set being included in described need and swelling power unit territory;
Otherwise, utilize Load flow calculation module judge this generating set exert oneself rise full time, whether the mistake carrying capacity of described overload circuit reduces; Cross carrying capacity if described to reduce, then this generating set is included in described need and swells power unit territory;
S5, the generating set swelled by described need in power unit territory are according to the generating set group regulating sensitivity to be divided into different grades;
Wherein, the adjustment sensitivity of each generating set is determined by the electric distance between this generating set and the need examination bus of direct-connected described overload circuit;
S6, meet S at the mistake carrying capacity �� L of described overload circuit1+S2+��+Si+��+SK�ܦ�L��S1+S2+��+Si+��+SK+SK+1Time, K+1 is to when regulating the highest generating set group of sensitivity level all to exert oneself to rise full to utilize Load flow calculation module to judge, described crosses whether carrying capacity �� L is reduced to 0, SiIt it is the upper reserve level of the generating set group of the i-th adjustment sensitivity level;
S7, judge described cross carrying capacity �� L be reduced to 0 time, from being low to moderate, the high order full adjustment sensitivity level that rises successively is greater than the exerting oneself of generating set group of k according to regulating sensitivity level to utilize Load flow calculation module, calculates and makes described to cross the minimum required number j of full generating set group of rising that exerts oneself that carrying capacity �� L is reduced to 0;
S8, utilize Load flow calculation module calculate when K+1 to K+j-1 regulate sensitivity level generating set group exert oneself rise full, when making carrying capacity �� L be reduced to 0, K+j regulated the minimum load amount of rising of the generating set group of sensitivity level, and K+j is less than or equals the maximum regulating sensitivity level;
S9, generating the first information, described first information comprises: exert oneself rise full and K+j of the generating set group of the 1st to K+j-1 adjustment sensitivity level regulates the described minimum load amount of rising of generating set group of sensitivity level.
2. method according to claim 1, it is characterised in that, described circuit overload treatment process also comprises:
�� L >=S is met at the described carrying capacity �� L that crosses1+S2+��+SmTime, generating the 2nd information, described 2nd information comprises: all generating set that described need swell in power unit territory are exerted oneself and all risen completely;
Wherein, m is the maximum regulating sensitivity level.
3. method according to claim 1, it is characterised in that, described circuit overload treatment process also comprises:
If utilizing described Load flow calculation module to judge not to be reduced to 0 at K+1 to the carrying capacity �� L that crosses described when regulating the generating set group that sensitivity level is the highest all to rise full, then generating the 3rd information, described 3rd information comprises: all generating set that described need swell in power unit territory are exerted oneself and all risen completely.
4. method according to claim 1, it is characterised in that, the computation process of the described minimum load amount of rising comprises:
When K+1 to K+j-1 regulate the generating set group of sensitivity level exert oneself rise full, increase, according to default step-length, the exerting oneself of generating set group that K+j regulates sensitivity level;
When increasing n described default step-length, the described carrying capacity �� L that crosses is not reduced to 0, and when increasing n+1 described default step-length, the described carrying capacity �� L that crosses is reduced to 0, then the described minimum load amount of rising is the product of described default step-length and n+1.
5. according to the arbitrary described method of claim 1-4, it is characterised in that,
S is met at the described carrying capacity �� L that crosses1+S2+��+Si+��+SK�ܦ�L��S1+S2+��+Si+��+SK+SK+1When, utilize described Load flow calculation module to judge not to be reduced to 0 or meet �� L >=S at the described carrying capacity �� L that crosses at K+1 to the carrying capacity �� L of mistake described when regulating the highest generating set group of sensitivity level all to rise full1+S2+��+SmWhen, described circuit overload treatment process also comprises:
Bus territory (B need to be examined or check for described1,B2��Bi��Bn) in any one need to examine or check bus BiAffiliated substation, performs following step:
Described the 220kV bus A outside bus territory need to be examined or check when also comprising in this substation1, bus A1With need to examine or check bus BiBetween be non-Electromagnetic coupling mode, and when the first switch is in hot stand-by duty, when utilizing described Load flow calculation module judge at closed described first switch and disconnect the 2nd switch, whether the mistake carrying capacity of described overload circuit reduces or eliminates,
Described cross carrying capacity reduce or eliminate time, generate the 4th information, described 4th information comprises: closed described first switch, and disconnects described 2nd switch;
Wherein, described first switch is bus A1With need to examine or check bus BiBetween bus connection switch or section switch, described 2nd switch is direction of tide is that inflow need to examine or check bus BiConnection line on line switch, and this connection line need to examine or check bus with another and be connected.
6. according to the arbitrary described method of claim 1-4, it is characterised in that, meet S at the described carrying capacity �� L that crosses1+S2+��+Si+��+SK�ܦ�L��S1+S2+��+Si+��+SK+SK+1When, utilize described Load flow calculation module to judge not to be reduced to 0 or meet �� L >=S at the described carrying capacity �� L that crosses at K+1 to the carrying capacity �� L of mistake described when regulating the highest generating set group of sensitivity level all to rise full1+S2+��+SmWhen, described circuit overload treatment process also comprises:
Bus territory (B need to be examined or check for described1,B2��Bi��Bn) in any one need to examine or check bus BiAffiliated substation, performs following step:
When the 3rd switch is in hot stand-by duty, then, when utilizing Load flow calculation module judge at closed described 3rd switch and disconnect the 4th switch, whether the mistake carrying capacity of described overload circuit reduces or eliminates;
Described cross carrying capacity reduce or eliminate time, generate the 5th information, described 5th information comprises: closed described 3rd switch, and disconnects described 4th switch;
Wherein, described 3rd switch is for need to examine or check bus BiSupply lead on line switch, this supply lead refers to need to examine or check bus B for describediThere is provided the circuit of power supply, and this supply lead does not need examination bus B with described need to examination in bus territoryiOutside other need to examine or check bus connect; Described 4th switch is direction of tide is that inflow need to examine or check bus BiConnection line on line switch, and this connection line need to examine or check bus with another and be connected.
7. according to the arbitrary described method of claim 1-4, it is characterised in that, meet S at the described carrying capacity �� L that crosses1+S2+��+Si+��+SK�ܦ�L��S1+S2+��+Si+��+SK+SK+1When, utilize described Load flow calculation module to judge not to be reduced to 0 or meet �� L >=S at the described carrying capacity �� L that crosses at K+1 to the carrying capacity �� L of mistake described when regulating the highest generating set group of sensitivity level all to rise full1+S2+��+SmWhen, described circuit overload treatment process also comprises:
Transformer territory (T need to be examined or check for described1,T2��Ti��Tn) in arbitrary need to examine or check transformer TiAffiliated substation, performs following step:
When being connected by the 7th switch between the bus that the bus that the 5th switch connects is connected with the 6th switch, when described 7th switch is in hot stand-by duty, described 6th switch is in running status, the electric current flowing through described 6th switch is greater than 0, and the transformer belonging to described 6th switch is described need to examine or check the transformer C outside transformer territory1Time, when utilizing Load flow calculation module judge at closed described 7th switch and disconnect described 5th switch, whether the mistake carrying capacity of described overload circuit reduces or eliminates;
Cross carrying capacity reduce if described or eliminate, and be non-Electromagnetic coupling mode between the bus that is connected with the 9th switch of the bus connected when the 8th switch, and the 8th the tenth switch between the bus that is connected with the 9th switch of the bus that connects of switch when being in hot stand-by duty, generate the 6th information, described 6th information comprises: first closed described tenth switch and disconnection the 11 switch, then close described 7th switch and disconnect described 5th switch, finally close described 11 switch and disconnect described tenth switch;
Cross carrying capacity reduce if described or eliminate, and when the bus that the bus that the 8th switch connects is connected with the 9th switch be Electromagnetic coupling mode or for same article of bus time, generating the 7th information, described 7th information comprises: closes described 7th switch and disconnects described 5th switch;
Wherein, described 5th switch is for need to examine or check transformer TiOn middle pressure by master switch or low pressure by master switch, described 6th switch is described transformer C1On middle pressure by master switch or low pressure by master switch, described 7th switch and described tenth switch are bus connection switch or section switch, and the 8th switch is described need to examine or check transformer TiOn high pressure by master switch, described 9th switch is described transformer C1On high pressure by master switch, described 11 switch is the line switch that described 8th switch is connected on the supply lead of bus, and this supply lead refers to the circuit of the bus offer power supply connected for described 8th switch.
8. according to the arbitrary described method of claim 1-4, it is characterised in that, also comprise transformer overload treatment process, described transformer overload treatment process comprises:
S1 ', determine overload transformer D1;
When connecting 14 switch between the bus that S2 ', the bus connected in duodecimo pass are connected with the 13 switch, when described 14 switch is in hot stand-by duty, described 13 switch is in running status, and the electric current flowing through described 13 switch is when being greater than 0, when utilizing described Load flow calculation module judge closed described 14 switch and disconnect described duodecimo pass, whether the mistake carrying capacity of described overload transformer reduces or eliminates;
Cross carrying capacity reduce if described or eliminate, and the bus connected when the 15 switch to close with sixteenmo between the bus being connected be non-Electromagnetic coupling mode, and the 17 switch that closes between the bus being connected with described sixteenmo of the bus that connects of described 15 switch is when being in hot stand-by duty, generate the 8th information, described 8th information comprises: first closed described 17 switch and disconnection the 18 switch, then close described 14 switch and disconnect described duodecimo and close, finally disconnect described 17 switch and closed described 18 switch,
Cross carrying capacity reduce if described or eliminate, and close the bus being connected when the bus that the 15 switch connects and sixteenmo be Electromagnetic coupling mode or during for same article of bus, generating the 9th information, described 9th information comprises: closes described 14 switch and disconnects described duodecimo and closes;
Wherein, described duodecimo is closed as described overload transformer D1On middle pressure by master switch or low pressure by master switch, described 13 switch is another transformer E1On middle pressure by master switch or low pressure by master switch, described 14 switch and described 17 switch are bus connection switch or section switch, and described 15 switch is described overload transformer D1On high pressure by master switch, described sixteenmo closes as E1On high pressure by master switch, the bus that described 18 switch connects for described 15 switch for referring to provides the circuit of power supply.
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| CN201510845467.0A CN105656086B (en) | 2015-11-26 | 2015-11-26 | Overload processing method |
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| CN109672171A (en) * | 2018-12-06 | 2019-04-23 | 国网天津市电力公司 | Eliminate the Automatic Control Strategy of 500kV transformer overload |
| CN109672225A (en) * | 2018-12-06 | 2019-04-23 | 国网天津市电力公司 | The Automatic Control Strategy of 220kV transformer overload is eliminated in a kind of adjustment |
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| CN109672171A (en) * | 2018-12-06 | 2019-04-23 | 国网天津市电力公司 | Eliminate the Automatic Control Strategy of 500kV transformer overload |
| CN109672225A (en) * | 2018-12-06 | 2019-04-23 | 国网天津市电力公司 | The Automatic Control Strategy of 220kV transformer overload is eliminated in a kind of adjustment |
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