CN112103961B - 110kV switch detection synchronous closing control method and device and computer storage medium - Google Patents

110kV switch detection synchronous closing control method and device and computer storage medium Download PDF

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CN112103961B
CN112103961B CN202010876200.9A CN202010876200A CN112103961B CN 112103961 B CN112103961 B CN 112103961B CN 202010876200 A CN202010876200 A CN 202010876200A CN 112103961 B CN112103961 B CN 112103961B
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voltage
station
bus
switch
closing
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CN112103961A (en
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花洁
陈凯阳
周俊宇
唐鹤
陈晓彤
李伟
骆国铭
钟童科
黄炳翔
梁锦来
陈刚
区允杰
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Guangdong Power Grid Co Ltd
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Guangdong Power Grid Co Ltd
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
    • H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks

Abstract

The invention discloses a 110kV switch detection synchronous closing control method, a device and a computer storage medium, wherein the storage medium stores a program capable of realizing the method, the device can realize the method, the method increases voltage criterion in a 110kV switch detection synchronous closing mode at an automatic main station end, when a dispatcher initiates a 110kV switch synchronous closing command at the automatic main station end, the system topology analysis obtains data of station voltage, active power, reactive power and the like at two ends of a closed loop, and whether voltage overlimit occurs during the closed loop period and after the loop is opened or not is judged through automatic calculation. If the voltage is not out of limit in the calculation, the automatic main station end normally issues the switching-on instruction to the station end; if the voltage is out of limit in calculation, the automatic main station end does not issue the switching-on instruction to the station end, and meanwhile, a prompt window pops up to prompt that the details of the bus with the voltage out of limit are generated, so that the voltage out of limit caused by the closing of the 110kV switch is avoided.

Description

110kV switch detection synchronous closing control method and device and computer storage medium
Technical Field
The invention relates to the field of electric power, in particular to a 110kV switch detection synchronous closing control method and device and a computer storage medium.
Background
The rapid development of economy, the living standard of people is greatly improved, the requirements on power supply reliability and electric energy quality are continuously improved, the voltage stability has great influence on the daily life of people, and particularly the 10kV bus voltage qualification rate.
The power supply enterprises continuously improve the 10kV bus voltage qualification rate through various technologies and management means, but some conditions affecting the voltage qualification rate still exist, for example, when a power dispatcher adjusts a power grid mode, different 220kV power supplies are required to be closed through a 110kV switch at the same time, and due to the difference of voltages on different 220kV power supplies, the 110kV and 10kV bus voltages of some transformer substations are greatly changed during or after the closing or the opening of the loop, and the 10kV bus voltage qualification rate is affected.
At present, the situation can only depend on the voltage regulation of an AVC system (regional voltage reactive power optimization control system) or the manual voltage regulation of a dispatcher after the voltage exceeds the limit, the intervention cannot be performed in advance, the voltage exceeding the limit cannot be avoided, and the high requirement on the 10kV bus voltage qualification rate under the current situation cannot be met.
Disclosure of Invention
The invention provides a 110kV switch detection synchronous closing control method and device and a computer storage medium, aiming at overcoming the defect that the voltage out-of-limit cannot be intervened in advance during the closing period or after the opening of a 110kV transformer substation in the prior art.
The method comprises the following switching-on steps:
s1: sending a 110kV switch synchronous closing instruction;
s2: acquiring voltage, active power and reactive power data of a 110kV bus and a 10kV bus of the transformer substations at two ends of the closed loop in a connection relation;
s3: calculating all 10kV bus voltage values with connection relation during loop closing and after loop opening in different connection modes according to the data obtained in the S2 and the connection mode of the loop closing substation;
s4: the 10kV bus voltage value calculated in the step S3 and the voltage qualified range are calculated, and if all the 10kV bus voltage values belong to the voltage qualified range, a 110kV switch-on command is issued to a plant end; and if the voltage value of the 10kV bus does not belong to the voltage qualified range, prompting that the voltage is out of limit, and carrying out manual operation.
Preferably, the connection modes of the closed-loop substation of S2 include two types:
setting a station B as a closed-loop 110kV transformer substation, and setting a station A and a station C as 220kV transformer substations;
the first wiring mode is as follows: the station A is connected with the station B through the station A outgoing switch and the station B first incoming switch in sequence;
the station C is connected with the station C through the station C outgoing switch and the station B second incoming switch in sequence;
the second incoming line switch of the station B is turned on in the same period, namely the ring closing period, and the first incoming line switch of the station B is turned off, namely the ring is opened;
the second wiring mode is as follows: the site A is connected with the site C through the site A outgoing switch and the site C outgoing switch in sequence; the B site is connected between the A site outlet switch and the C site outlet switch through the B site inlet switch;
and in the same period, closing the outgoing line switch of the station C, namely in the loop closing period, and disconnecting the outgoing line switch of the station A, namely after the loop is opened.
Preferably, in S3, the calculation formula of all the 10kV bus voltage values having a connection relationship during ring closing and after ring opening in the first connection mode is:
Figure BDA0002649839030000021
Figure BDA0002649839030000022
b'x＝(a'x+c'x)/2
a″x＝ax
Figure BDA0002649839030000023
c″x＝cx
wherein, axIs a 10kV bus voltage of A station, bxIs the B station 10kV bus voltage, cxThe voltage is the 10kV bus voltage of the C station; a'xIs the voltage during the loop closing of the A station 10kV bus, b'xIs the voltage, c 'during the loop closing of the B station 10kV bus'xThe voltage is the voltage of the station A during the loop closing period of the 10kV bus; a ″)xIs the voltage b' of the A station 10kV bus after ring openingxIs the voltage c' of the B station 10kV bus after ring openingxIs the voltage, U, of the C station 10kV bus after ring openingAIs 110kV bus voltage of A station, UCIs the C site 110kV bus voltage; pBIs the active power of a B station 110kV bus, PCIs the active power of the C site 110kV bus, QAIs the reactive power of the A site 110kV bus, QBIs reactive power of a B station 110kV bus, QCIs the reactive power of a 110kV bus at a C station, x belongs to [1, N ]]N is the number of loops of 10kV bus of each station, k1As a correction factor for active power, k2Is a correction factor for the reactive power.
Preferably, in the S3, during the loop closing period in the second connection mode and during the calculation of all the 10kV bus voltage values having connection relations after the loop is released, the B station voltage after the loop is released is considered in the loop closing and loop releasing process in the second connection mode, and based on the principle that it is ensured that no 10kV voltage out-of-limit occurs in all the A, B, C stations and the calculation is simple, it is only required to ensure that the 10kV voltage B ″ of the B station after the loop is releasedxAnd (5) within a qualified range.
Preferably, the B station 10kV voltage B' after ring releasexThe calculation formula of (2) is as follows:
Figure BDA0002649839030000031
b″xis the voltage of a B station 10kV bus after ring opening, BxIs the B station 10kV bus voltage, UAIs 110kV bus voltage of A station, UCIs the C site 110kV bus voltage.
Preferably, the voltage qualified range of S4 is: 10.1kV to 10.7 kV.
Preferably, the prompting content format of the voltage out-of-limit in S4 is: the synchronous closing of the 110kVXX switch can cause the voltage of an XX transformation 10kV # X bus to exceed the upper limit/lower limit, and the calculated value is XXkV; whether the 110kVXX switch is still synchronized.
Preferably, the manual operation is specifically: selecting yes or no according to the prompting content of the voltage out-of-limit,
if the selection is yes, inputting a password for confirmation, and executing continuous synchronous closing operation;
if not, inputting a password for confirmation, and executing the operation of not issuing the closing instruction to the plant station end.
The invention also provides a 110kV switch detection synchronous closing control device, which comprises a memory, a processor, a program stored on the memory and capable of running on the processor, a human-computer interaction interface,
the human-computer interaction interface is used for inputting a 110kV switch synchronous closing instruction, prompting voltage out-of-limit and selecting whether to continue synchronous closing operation;
and when the program is executed by the processor, the step of controlling the 110kV switch synchronous closing is realized.
The invention also provides a computer storage medium for computer readable storage, wherein the computer storage medium is stored with a 110kV switch detection synchronous closing control program; and the 110kV switch detection synchronous closing control program realizes the steps of the 110kV switch detection synchronous closing control method when being executed by a processor.
According to the invention, a voltage criterion is added in a mode of detecting synchronous closing of the 110kV switch at the automatic main station end, when a dispatcher initiates a synchronous closing command of the 110kV switch at the automatic main station end, the system topology analysis obtains data such as voltage, active power, reactive power and the like of stations at two ends of a loop closing process, and whether voltage out-of-limit occurs during the loop closing process and after the loop is opened is judged through automatic calculation. If the voltage is not out of limit in the calculation, the automatic main station end normally issues the switching-on instruction to the station end; if the voltage is out of limit in calculation, the automatic main station end does not issue the switching-on instruction to the station end, and meanwhile, a prompt window pops up to prompt that the details of the bus with the voltage out of limit are generated, so that the voltage out of limit caused by the closed loop of the 110kV switch is avoided, and the voltage qualified rate of the 10kV bus is improved.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
in the prior art, corresponding adjustment can be carried out only after the voltage of the 10kV bus is out of limit, but the invention can calculate whether the voltage of the 10kV bus is out of limit in advance, and if the out of limit is judged to appear, the 110kV switch is prevented from closing the loop in time, and the out of limit voltage caused by the 110kV switch closing the loop is fundamentally avoided through calculation and intervention in advance, so that the qualification rate of the 10kV voltage can be further improved.
Drawings
Fig. 1 is a flowchart of a 110kV switch detection synchronous closing control method described in embodiment 1.
Fig. 2 is a first connection mode of the closed-loop substation described in embodiment 1.
Fig. 3 is a second connection mode of the closed-loop substation described in embodiment 1.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1:
the embodiment provides a 110kV switch detection synchronous closing control method, as shown in fig. 1, the method includes the following steps:
s1: a dispatcher initiates a 110kV switch synchronous closing command at an automatic master station end;
s2: the method comprises the steps that a real-time topology analysis is carried out to obtain a 110kV bus and a 10kV bus which are connected with substations at two ends of a closed loop, and data such as voltage, active power and reactive power of the buses are obtained;
the data mainly comes from an automatic system.
The automation system provides E-files (including telemetry, etc.), device association data, device attribute information (including home substation, device type, voltage class, etc.).
S3: calculating all 10kV bus voltage values with connection relations during ring closing and after ring opening according to the data obtained in the S2;
the connection modes of the closed-loop substation are as follows:
as shown in fig. 2, the first connection method is: the station A is connected with the station B through the station A outgoing switch and the station B first incoming switch in sequence;
the station C is connected with the station C through the station C outgoing switch and the station B second incoming switch in sequence;
the second incoming line switch of the station B is turned on in the same period, namely the ring closing period, and the first incoming line switch of the station B is turned off, namely the ring is opened;
as shown in fig. 3, the second connection method is: the site A is connected with the site C through the site A outgoing switch and the site C outgoing switch in sequence; the B site is connected between the A site outlet switch and the C site outlet switch through the B site inlet switch;
and in the same period, closing the outgoing line switch of the station C, namely in the loop closing period, and disconnecting the outgoing line switch of the station A, namely after the loop is opened.
The calculation formula of all 10kV bus voltage values with connection relation during ring closing and after ring opening in the first wiring mode is as follows:
Figure BDA0002649839030000051
Figure BDA0002649839030000052
b'x＝(a'x+c'x)/2
a″x＝ax
Figure BDA0002649839030000053
c″x＝cx
wherein, axIs a 10kV bus voltage of A station, bxIs the B station 10kV bus voltage, cxThe voltage is the 10kV bus voltage of the C station; a'xIs the voltage during the loop closing of the A station 10kV bus, b'xIs the voltage, c 'during the loop closing of the B station 10kV bus'xThe voltage is the voltage of the station A during the loop closing period of the 10kV bus; a ″)xIs the voltage b' of the A station 10kV bus after ring openingxIs the voltage c' of the B station 10kV bus after ring openingxIs the voltage, U, of the C station 10kV bus after ring openingAIs 110kV bus voltage of A station, UCIs the C site 110kV bus voltage; pBIs the active power of a B station 110kV bus, PCIs the active power of the C site 110kV bus, QAIs the reactive power of the A site 110kV bus, QBIs reactive power of a B station 110kV bus, QCIs the reactive power of a 110kV bus at a C station, x belongs to [1, N ]]N is the number of 10kV bus loops at each station (in the embodiment, the number of 10kV bus loops at the station A, the station B and the station C is the same), and k is1As a correction factor for active power, k2Is a correction factor for the reactive power. U in this exampleA>UB。
The second algorithm is as follows: a
During the ring closing period and after the ring opening in the second connection mode, the calculation of all the 10kV bus voltage values with the connection relation is considered, in the ring closing and ring opening process in the second connection mode, the B station voltage with the largest voltage change amplitude is obtained after the ring opening, and the B station voltage is ensuredA. B, C the principle that 10kV voltage out-of-limit and simple calculation do not occur in three stations, only 10kV voltage B' of B station after ring opening needs to be ensuredxAnd (5) within a qualified range. 10kV voltage B' of B station after ring releasexThe calculation formula of (2) is as follows:
Figure BDA0002649839030000061
s4: the 10kV bus voltage value (a ') calculated in the step S3'x、b'x、c'x、a″x、b″x、c″x) Comparing the voltage with a qualified voltage range, and if all the voltage values of the 10kV bus belong to the qualified voltage range, the automatic main station end issues the switching-on instruction to the station end; if the voltage value of the 10kV bus does not belong to the voltage qualified range, popping up a prompt window to prompt details of the 10kV bus with out-of-limit voltage;
the format of the prompting content of the prompting window is as follows: the synchronous closing of the 110kVXX switch can cause the voltage of an XX transformation 10kV # X bus to exceed the upper limit/lower limit, and the calculated value is XXkV; is the 110 kVXswitch still in sync?
If the selection is yes, the dispatcher inputs a password, and the automatic master station end issues the switching-on instruction to the station end;
if not, the dispatcher inputs a password, and prompts: operation is carried out after the bus voltage of the response transformer substation is regulated; the automatic master station end does not issue the switching-on instruction to the station end.
The qualified range of the 10kV bus voltage in the step S4 can be correspondingly adjusted according to actual needs; in this example, 10.1kV to 10.7kV was selected.
In the embodiment, the primary station automation system is utilized to realize the advance quantitative analysis of the influence of the simultaneous ring closing of the 110kV switch on the 10kV bus voltage, and a dispatcher is prompted to avoid the voltage out-of-limit caused by the ring closing of the 110kV switch, so that the voltage qualification rate of the 10kV bus is improved.
Example 2:
the embodiment provides a 110kV switch detection synchronous closing control device which is characterized by comprising a memory, a processor, a program which is stored in the memory and can run on the processor, and a human-computer interaction interface;
the human-computer interaction interface is used for inputting a 110kV switch synchronous closing instruction, prompting voltage out-of-limit and selecting whether to continue synchronous closing operation;
when the program is executed by the processor, the steps of 110kV switch detection synchronous closing control in embodiment 1 are realized.
Example 3:
the embodiment provides a computer storage medium for computer readable storage, which is characterized in that a 110kV switch detection synchronous closing control program is stored on the computer storage medium; the 110kV switch detection synchronous closing control program realizes the steps of the 110kV switch detection synchronous closing control method in the embodiment 1 when being executed by a processor.
The terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (7)

1. A110 kV switch detection synchronous switching-on control method is characterized by comprising the following switching-on steps:
s1: sending a 110kV switch synchronous closing instruction;
s2: acquiring voltage, active power and reactive power data of a 110kV bus and a 10kV bus of the transformer substations at two ends of the closed loop in a connection relation;
s2 the connection mode of the closed-loop substation comprises two modes:
setting a station B as a closed-loop 110kV transformer substation, and setting a station A and a station C as 220kV transformer substations;
the first wiring mode is as follows: the station A is connected with the station B through the station A outgoing switch and the station B first incoming switch in sequence;
the station C is connected with the station C through the station C outgoing switch and the station B second incoming switch in sequence;
the second incoming line switch of the station B is turned on in the same period, namely the ring closing period, and the first incoming line switch of the station B is turned off, namely the ring is opened;
the second wiring mode is as follows: the site A is connected with the site C through the site A outgoing switch and the site C outgoing switch in sequence; the B site is connected between the A site outlet switch and the C site outlet switch through the B site inlet switch;
closing the outgoing line switch of the station C in the same period, namely closing the ring, and disconnecting the outgoing line switch of the station A, namely opening the ring;
s3: calculating all 10kV bus voltage values with connection relation during loop closing and after loop opening in different connection modes according to the data obtained in the S2 and the connection mode of the loop closing substation;
the calculation formula of all 10kV bus voltage values with connection relation during ring closing and after ring opening in the first wiring mode is as follows:
Figure FDA0003485094940000011
Figure FDA0003485094940000012
b'x＝(a'x+c'x)/2
a”x＝ax
Figure FDA0003485094940000013
c”x＝cx
wherein, axIs a 10kV bus voltage of A station, bxIs the B station 10kV bus voltage, cxThe voltage is the 10kV bus voltage of the C station; a'xIs the voltage during the loop closing of the A station 10kV bus, b'xIs the voltage, c 'during the loop closing of the B station 10kV bus'xThe voltage is the voltage of the C station 10kV bus in the loop closing period; a "xIs the voltage of the A station 10kV bus after ring opening, b "xVoltage after ring-opening of 10kV bus at B station, c "xIs the voltage, U, of the C station 10kV bus after ring openingAIs 110kV bus voltage of A station, UCIs the C site 110kV bus voltage; pBIs the active power of a B station 110kV bus, PCIs the active power of the C site 110kV bus, QAIs the reactive power of the A site 110kV bus, QBIs reactive power of a B station 110kV bus, QCIs the reactive power of a 110kV bus at a C station, x belongs to [1, N ]]N is the loop number of the 10kV bus of each station; k is a radical of1As a correction factor for active power, k2A correction factor for reactive power;
during the ring closing period and after ring opening in the second connection mode, the voltage of the station B with the largest voltage change amplitude after ring opening is considered in the calculation of all the voltage values of the 10kV bus with the connection relation in the ring closing and ring opening process in the second connection mode, and based on the principle that the A, B, C three stations cannot have the 10kV voltage out-of-limit and the calculation is simple, only the 10kV voltage B of the station B after ring opening needs to be ensured "xWithin the qualified range;
s4: the 10kV bus voltage value calculated in the step S3 and the voltage qualified range are calculated, and if all the 10kV bus voltage values belong to the voltage qualified range, a 110kV switch-on command is issued to a plant end; and if the voltage value of the 10kV bus does not belong to the voltage qualified range, prompting that the voltage is out of limit, and carrying out manual operation.
2. The 110kV switch-checking synchronous closing control method according to claim 1, wherein 10kV voltage B is applied to the B station after ring opening "xThe calculation formula of (2) is as follows:
Figure FDA0003485094940000021
b”xis the voltage of a B station 10kV bus after ring opening, BxIs the B station 10kV bus voltage, UAIs 110kV bus voltage of A station, UCIs the C site 110kV bus voltage.
3. The 110kV switch synchronous closing control method according to claim 2, wherein the voltage qualified range of S4 is as follows: 10.1kV to 10.7 kV.
4. The 110kV switch synchronous closing control method according to claim 3, wherein the format of the prompt content of the voltage out-of-limit in S4 is as follows: the synchronous closing of the 110kVXX switch can cause the voltage of an XX transformation 10kV # X bus to exceed the upper limit/lower limit, and the calculated value is XXkV; whether the 110kVXX switch is still synchronized.
5. The 110kV switch synchronous closing control method according to claim 4, characterized in that the manual operation specifically comprises: selecting yes or no according to the prompting content of the voltage out-of-limit,
if the selection is yes, inputting a password for confirmation, and executing continuous synchronous closing operation;
if not, inputting a password for confirmation, and executing the operation of not issuing the closing instruction to the plant station end.
6. The 110kV switch detection synchronous closing control device is characterized by comprising a memory, a processor, a program and a human-computer interaction interface, wherein the program is stored in the memory and can run on the processor;
the human-computer interaction interface is used for inputting a 110kV switch synchronous closing instruction, prompting voltage out-of-limit and selecting whether to continue synchronous closing operation;
the program when executed by the processor implements the steps of 110kV switch detection synchronous closing control as recited in claim 5.
7. A computer storage medium is used for computer readable storage and is characterized in that a 110kV switch detection synchronous closing control program is stored on the computer storage medium; when being executed by a processor, the 110kV switch synchronous closing control program realizes the steps of the 110kV switch synchronous closing detection control method as claimed in claim 5.
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