CN109980616A - The guard method of 110kV single-trunk segmental wiring integration protective device - Google Patents
The guard method of 110kV single-trunk segmental wiring integration protective device Download PDFInfo
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- CN109980616A CN109980616A CN201910261401.5A CN201910261401A CN109980616A CN 109980616 A CN109980616 A CN 109980616A CN 201910261401 A CN201910261401 A CN 201910261401A CN 109980616 A CN109980616 A CN 109980616A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of guard methods of 110kV single-trunk segmental wiring integration protective device, integrated 110kV bus differential protection, 110kV prepared auto restart, the logic of 110kV sectionalised protection, optimize integrated protective device hardware, terminal block, analog quantity, the allocation plans such as switching value and definite value inventory, realize 110kV bus differential protection, 110kV prepared auto restart, the function of 110kV sectionalised protection, Open Loop Operation application program is closed in extension, so that integrated protective device 110kV bus differential protection device, the functions such as 110kV sectionalised protection device and 110kV backup auto-activating device are not fully exerted, especially suitable for Intelligent transformer station, it can be also applicable in conventional substation.Present invention may also apply to the sides 220kV substation 110kV using single-trunk segmental wiring or double bus scheme.
Description
Technical field
The present invention relates to a kind of guard methods of 110kV single-trunk segmental wiring integration protective device, and it is defeated to belong to electric power
Distribution network control technology field.
Background technique
The side Jiangsu Power Grid 110kV substation 110kV main electrical scheme mainly uses single-trunk segmental wiring, protection blocking at present
The embodiment of 110kV prepared auto restart has 2 kinds: first is that using 110kV bus differential protection；Second is that being protected using 110kV power circuit.It is right
In the former scheme, Q/GDW 10766 is provided: 110kV bus differential protection locking 110kV prepared auto restart only provides 1 secondary contact, i.e., for appointing
What system failure mode, 110kV bus differential protection is latched 110kV prepared auto restart, under 1 route band whole bus mode, power supply
The corresponding bus of route breaks down, and will result in the power failure of whole transformer station whole station；For latter solution, have the following problems:
1) when there is 110kV outlet route in this substation, cannot be distinguished when outlet line fault is 110kV bus-bar fault or outlet route
Failure；2) when this substation 110kV high voltage side of transformer failure, cannot be distinguished is 110kV bus-bar fault or 110kV transformer
High-voltage side fault；3) when the power supply of 110kV power circuit is returned by this substation 1,1 bus-bar fault, cannot be distinguished is the event of which bus
Barrier；4) protection of 110kV power circuit is typically designed to outlet protection in design；5) 110kV power circuit is protected in operation
It uses, and needs for incoming relay-protection contradiction sometimes for being protected as outlet；6) 110kV power circuit failure in actual motion,
A lot of 110kV power circuit protection misoperations have occurred and have accidentally been latched prepared auto restart.Due to 110kV micro-computer bus-differential protection, have
Full current voltage circuit, the tripping being respectively spaced only lack the closing circuit and corresponding breaker of incoming switch, block switch
The switching values information such as position.If on the basis of 110kV busbar differential protection device, in addition the incoming switch lacked, segmentation are opened
The switching values information such as the closing circuit of pass and corresponding circuit breaker position, integrated 110kV prepared auto restart, 110kV sectionalised protection are patrolled
Volume, 110kV integration protective device is developed, 110kV integration protective device hardware configuration, device terminals row arrangement, dress are integrated
The specification such as access amount is set, it can be achieved that integrating 110kV prepared auto restart, 110kV point on the basis of 110kV busbar differential protection device
The 110kV integration protective device of the logics such as section protection.Need to consider emphatically in the embodiment of integrated protective device asks
Topic has: cooperation and logic blocking problem between bus differential protection and prepared auto restart；The expanded application problem of integrated protective device；One
The configuration specification problem etc. of body protective device hardware and device rear terminal row.
Summary of the invention
The purpose of the present invention is to provide a kind of guard method of 110kV single-trunk segmental wiring integration protective device,
The logic of integrated 110kV bus differential protection, 110kV prepared auto restart, 110kV sectionalised protection optimizes integrated protective device hardware, terminal
The allocation plans such as row, analog quantity, switching value and definite value inventory realize 110kV bus differential protection, 110kV prepared auto restart, 110kV segmentation
Open Loop Operation application program is closed in the function of protection, extension, improves operation of power networks level and power supply reliability.
The purpose of the present invention is achieved by the following technical programs:
A kind of guard method of 110kV single-trunk segmental wiring integration protective device, electric substation's 110kV sectionalized single busbar connection
Wiring integration protective device includes bus differential protection device, sectionalised protection device, backup auto-activating device, power supply conjunction solution loop device, mother
Differential protection method is as follows:
Bus differential protection action jumps I section of bus breaker and is latched the control that No. 1 power circuit breaker closes a floodgate simultaneously are as follows:
Barring condition 1:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of I section of bus of the 110kV without segmented current；
(3) the big differential relay movement of the female difference of 110kV；
(4) section switch is in open position；
After above-mentioned condition meets, bus differential protection action jumps I section of bus breaker and is latched No. 1 power circuit breaker conjunction simultaneously
Lock；
Barring condition 2:
1) T time clearing signal condition is exported:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of II section of bus of the 110kV containing segmented current；
(3) the big differential relay movement of the female difference of 110kV；
When above-mentioned (1)-(3) condition whole satisfaction, T time clearing signal is exported；
2) barring condition:
(1) when above-mentioned (1)-(3), condition either condition is unsatisfactory for, the small differential relay of the female poor II section of bus of 110kV or
110kV II section of bus composite voltage element of female big differential relay or 110kV of difference, becomes returning from acting originally；
(2) there is output T time clearing signal；
(3) when section switch 3DL becomes open position from closing position；
(4) the small differential relay of the female poor II section of bus of the 110kV without segmented current is not operating；
(5) I section of bus compound voltage lockout of 110kV is open；
(6) the big differential relay movement of the female difference of 110kV；
(7) the phase current elements being segmented are more than setting valve or zero-sequence current component element is more than setting valve；
After above-mentioned condition all meets, after delay t1 delay, bus differential protection action is jumped I section of bus breaker and is latched simultaneously
No. 1 power circuit breaker closes a floodgate；
Barring condition 3:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
(3) prepared auto restart starts No. 1 electric power incoming line breaker 1DL and closes a floodgate；
(4) No. 1 electric power incoming line breaker 1DL become closing position from open position；
The phase current element of (5) No. 1 electric power incoming lines is more than setting valve or zero-sequence current component is more than setting valve；
After above-mentioned condition all meets, bus differential protection action jumps I section of bus breaker and is latched No. 1 power circuit breaker simultaneously
It closes a floodgate；
Bus differential protection action jumps II section of bus breaker and is latched the control method that No. 2 power circuit breakers close a floodgate simultaneously are as follows:
Barring condition 1:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of II section of bus of the 110kV without segmented current；
(3) the big differential relay movement of the female difference of 110kV；
(4) section switch is in open position
After above-mentioned condition meets, bus differential protection action jumps I section of bus breaker and is latched No. 2 power circuit breakers conjunctions simultaneously
Lock；
Barring condition 2:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
(3) prepared auto restart starts No. 2 electric power incoming line breaker 2DL and closes a floodgate；
(4) No. 2 electric power incoming line breaker 2DL become closing position from open position；
The phase current element of (5) No. 2 electric power incoming lines is more than setting valve or zero-sequence current component is more than setting valve；
After above-mentioned condition all meets, bus differential protection action jumps I section of bus breaker and is latched No. 1 power circuit breaker simultaneously
It closes a floodgate；
Bus differential protection action is latched the control method that section switch closes a floodgate are as follows:
Barring condition 1:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
(3) the female poor small differential relay movement of I section of bus of the 110kV containing segmented current；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously；
Barring condition 2:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of I section of bus of the 110kV without segmented current；
(3) the big differential relay movement of the female difference of 110kV；
(4) section switch is in open position；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously；
Barring condition 3:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
(3) the female poor small differential relay movement of II section of bus of the 110kV containing segmented current；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously；
Barring condition 4:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of II section of bus of the 110kV without segmented current；
(3) the big differential relay movement of the female difference of 110kV；
(4) section switch is in open position；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously；
Barring condition 5:
(1) the big differential relay movement of the female difference of 110kV；
(2) I section of bus compound voltage lockout of 110kV is open or II section of bus compound voltage lockout of 110kV is open；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously.
The purpose of the present invention can also be further realized by following technical measures:
The guard method of aforementioned 110kV single-trunk segmental wiring integration protective device is adjusted in barring condition 1,2 and is required
It is as follows:
(1) in barring condition 1,2, the phase current element definite value of segmentation or No. 1 electric power incoming line or No. 2 electric power incoming lines is by escaping
The maximum for flowing through this protection in this electric substation or 110kV outlet route in electric substation's maximum transformer, when low-voltage bus bar short circuit is short
Road current calibration:
(1) in formula,Most for electric substation in this electric substation under system maximum operational mode or 110kV outlet route
The maximum short circuit current of this protection, K are flowed through in big transformer, when low-voltage bus bar short circuitkFor safety factor, 1.3~1.5 are taken；
The zero-sequence current component definite value of segmentation or No. 1 electric power incoming line presses the small mode 110kV bus singlephase earth fault of system
There is >=1.5 times of sensitivity adjusting:
(2) in formula,For 110kV bus single-phase short circuit current, K under system minimum operational modelmFor sensitive system
Number, takes 1.5；
(2) the phase current element of segmentation or No. 1 electric power incoming line or No. 2 electric power incoming lines takes the phase current of A phase, B phase, C phase；
The phase current element and zero-sequence current component requirement band directional element of (3) No. 1 electric power incoming lines or No. 2 electric power incoming lines,
Directional element is directed toward: being directed toward bus by route.
The guard method of aforementioned 110kV single-trunk segmental wiring integration protective device, the output open hour T take
200-300
Millisecond；Delay t1 takes 20-40 milliseconds.
The guard method of aforementioned 110kV single-trunk segmental wiring integration protective device, higher level substation source side route
Relaying configuration and adjusting require as follows:
Higher level substation source side route protection configuration requirement:
Power circuit configuration fibre-optic current differential protection, I section~III section of phase spacing protection and the ground connection of higher level substation
I section~III section of distance protection, I section~III section of zero-sequence current protection and reclosing；
When the power circuit be short-term road, length be less than or equal to 5km when, the power circuit of higher level substation must configure and
Adjust fibre-optic current differential protection；
The adjusting of higher level substation source side route protection requires:
It wherein deactivates for I section of zero-sequence current, I section of phase spacing protection, I section of ground distance and II section of phase spacing protection connect
The adjusting of II section of ground distance, II section of zero-sequence current requires as follows:
(1) I section of phase spacing, I section of ground distance protection:
It is adjusted by this line end failure is escaped:
Zzd≤KKZL (3)
(3) K in formulaKFor safety factor, 0.7~0.8 is taken；
I section of phase spacing, I section of the ground distance delay protected are 0s；
When the power circuit is short-term road, and length is less than or equal to 5km, I section of I section of phase spacing, ground distance protection nothing
It is deactivated when method is adjusted, defencive function is served as by the fibre-optic current differential protection of configuration complete fibre function；
(2) II section of phase spacing, II section of ground distance protection:
By escape on this electric substation or 110kV outlet route in electric substation's maximum transformer, low-voltage bus bar short circuit Shi Benbao
The minimum measurement impedance setting of shield:
Zzd≤KKZL+KKbZb (4)
(4) K in formulaK、KKbFor safety factor, 0.7~0.8, Z is takenLFor line impedance, ZbFor transformer impedance；
II section of phase spacing, II section of the ground distance delay protected are 0.3s；
(3) II section of zero-sequence current
There is enough sensitivity to adjust by this line end failure:
(5) in formula formula,For 110kV bus single-phase short circuit current, K under system minimum operational modelmFor sensitive system
Number, takes 1.5；
The delay of II section of zero-sequence current protection is 0.3s；
It is adjusted by above-mentioned requirements, I section of phase spacing protection and I section of ground distance of protection protection scope are route route
70%~80%, II section of phase spacing protection, II section of ground distance protection, II section of zero-sequence current of protection scope are that this route is complete
Portion, and the high-voltage winding part of junior's route or main transformer is protruded into, it is delayed as 0.3s.
Compared with prior art, the beneficial effects of the present invention are:
1, the integration for the single-trunk segmental wiring that the present invention develops on the basis of existing 110kV bus differential protection hardware is protected
Protection unit realizes the functions such as 110kV bus differential protection device, 110kV sectionalised protection device and 110kV backup auto-activating device, expands
Sequencing power supply quickly closes the utilization unlinked.
2, terminal row arrangement, unit simulation amount and switch that the present invention extends, optimizes and standardized integrated protective device
The access amounts such as amount and the amount of outputing configure and protect definite value configuration, so that integration protective device 110kV bus differential protection device,
The functions such as 110kV sectionalised protection device and 110kV backup auto-activating device are not fully exerted.
3, protective device of the present invention can be also applicable in especially suitable for Intelligent transformer station in conventional substation.
4, protective device of the present invention can also be used for the 220kV substation using single-trunk segmental wiring or double bus scheme
The side 110kV.
Detailed description of the invention
Fig. 1 is hardware structure diagram of the present invention；
Fig. 2 is busbar protective device typical wiring figure；
Fig. 3 is NSR-371IAF plug-in card configuration figure；
Fig. 4 is NSR-371IAF backboard terminal definition figure；
Fig. 5 is NSR-371IAF backboard terminal definition figure；
Fig. 6 is 110kV bus differential protecting and locking prepared auto restart schematic diagram；
Fig. 7 is 110kV electric substation sectionalized single busbar connection primary connection circuit figure；
Fig. 8 is 220kV electric substation 110kV double-bus (sectionalized single busbar connection) primary connection circuit figure；
Symbol description is as follows in Fig. 3, Fig. 4:
Indicate logical AND relationship, i.e., when input condition all meets, output is effective；
Indicate logic or relationship, i.e., input condition is any when meeting, and output is effective.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
Substation 110kV integration protective device institute application of the invention is that the existing side 110kV substation 110kV is single
Bus section wiring；As shown in fig. 7, the 110kV system primary connection circuit of the transmission and distribution networks include: 1 route of electric power incoming line and
2 route of electric power incoming line passes through breaker interval equipment connection I section of 110kV bus, II section of 110kV bus, I section of mother 110kV respectively
It is serially connected with section switch interval branch between line and II section of 110kV bus, divides on I section of 110kV bus and II section of 110kV bus
It is not connected with No. 1 transformer or No. 2 side transformer 110kV breaker branches and No. 1 wire-outgoing breaker interval branch or No. 2 outlets
Breaker interval branch and 110kVTV1 or 110kVTV2, each breaker interval branch are serially connected with TA, transformer 110kV
Side breaker branch has series transformer, and there is route TV in 1 route of electric power incoming line and 2 line side of electric power incoming line.
Electric substation 110kV single-trunk segmental wiring integration protective device of the invention, including hardware components and software portion
Divide (logic).
1, hardware
(1) hardware uses modularized design, mainly includes power module, AC module, ADC module, CPU module, DSP mould
Block is opened into module, relay outlet module and human-computer interface module, and intermodule is communicated by core bus.Power module output+
5V ,+24V give protective device other module for power supply；Input exchange signal is converted to ac small signal and gives ADC mould by AC module
Block；ADC module includes low-pass filtering and analog-digital conversion function, and per AC signal all the way, corresponding 2 road AD use channel, sampled value
Digital quantity gives CPU module and DSP module by high speed SPORT oral instructions；It opens after signal conversion is opened in outside by module and gives
CPU module and DSP module；Device core, by high performance central processing unit (CPU) and digital signal processor (DSP)
Module composition, the general initiating element and man-machine interface and background communication function of CPU module realization protective device, general starting member
The positive supply of part open exit relay after starting, CPU module also complete logout and printing, the backstage for protecting part simultaneously
Communication and and panel communication, in addition also have the function of complete failure wave-recording, recording format and COMTRADE format compatible, recording
Data can individually serial ports output or printout；DSP module completes all protection algorism and logic function, passes through judgement of shoving
Module calculates the sample waveform of input, and providing system power is fault current or the judgement symbol to shove, in conjunction with resistance
Anti- component module calculating finally judges signal and gives to output module and CPU module；Relay outlet module is according to action signal
The corresponding actuating of relay is driven, as shown in Figure 1.
(2) typical wiring figure
The wiring of device exemplary terminal is defined as terminal number signal as shown in Fig. 2, only listing part connector terminals in figure
With plug-in card configuration and terminal definition are detailed in figure Fig. 3~Fig. 5.The naming rule of device terminals number are as follows: card slots number+plug-in unit upper end
Son number, the two is close to centre is without space or other characters.Terminal number on plug-in unit is indicated with two, less than two,
Mend 0 in front.For example, CPU card number is 5, No. 03 terminal is compiled on plug-in unit are as follows: 0503.
(3) plug-in unit of device
The plug-in unit of component devices has: power insert, exchange plug-in unit, low pass filtered involve ADC plug-in unit, CPU card, 8V/110V/
220V is opened into plug-in unit, relay outlet plug-in unit, display panel etc., sees Fig. 3.As listed in Table 1.
1 package types of table
(4) on the basis of 110kV busbar differential protection device hardware, in addition the incoming switch lacked, block switch
The hardware of the switching values information such as closing circuit and corresponding circuit breaker position, and to bus differential protection device, sectionalised protection device, standby
Automatic bus, power supply close solution loop device etc. ac terminals, open into terminal, outputing terminal etc., devices rear terminal row's hardware device carries out
Plan as a whole and standardize, enables to adapt to requirement of the 110kV integration protective device to hardware device.It is shown in Table 2~table 4
A, ac terminal
Table 2,110kV integration protective device ac terminal allocation list
In table 1: 1~15 in addition to for busbar protective device, is also used to backup auto-activating device, sectionalised protection device, power supply
Close solution loop device, wherein 1~6 be I section of bus of 110KV and II section of bus alternating voltage, 7~9 be segmented current, 10~12
Be 1 electric current of electric power incoming line, 13~15 be 2 electric current of electric power incoming line, 16~54 are used to bus for other branch currents and protect
Shield, 55~56 are 2 line side voltage of electric power incoming line 1 and inlet wire
B, it opens into terminal
Table 3,110kV integration protective device are opened into terminal arrangement table
| Serial number | Tunnel name | Serial number | Tunnel name |
| 1 | 1 breaker 1DL of power supply jumps position TWJ | 8 | Distant place cyclization mode |
| 2 | KKJ after 1 breaker 1DL of power supply is closed | 9 | Cyclization deactivates on the spot |
| 3 | 2 breaker 2DL of power supply jumps position TWJ | 10 | Ring-closing selective tripping 1DL on the spot |
| 4 | KKJ after 2 breaker 2DL of power supply is closed | 11 | Ring-closing selective tripping 2DL on the spot |
| 5 | Section switch 3DL jumps position TWJ | 12 | Ring-closing selective tripping 3DL on the spot |
| 6 | Section switch 3DL coincidence HWJ | 13 | Cyclization allows on the spot |
| 7 | KKJ after section switch 3DL is closed |
C, terminal is outputed
Table 4,110kV integration protective device output terminal arrangement table
| Serial number | Tunnel name | Serial number | Tunnel name |
| 1 | Branch 01 trips | 11 | Branch 11 trips |
| 2 | Branch 02 trips | 12 | Branch 12 trips |
| 3 | Branch 03 trips | 13 | Branch 13 trips |
| 4 | Branch 04 trips | 14 | Branch 14 trips |
| 5 | Branch 05 trips | 15 | Branch 15 trips |
| 6 | Branch 06 trips | 16 | Branch 16 trips |
| 7 | Branch 07 trips | 17 | 1 breaker 1DL of power supply closes a floodgate |
| 8 | Branch 08 trips | 18 | 2 breaker 2DL of power supply closes a floodgate |
| 9 | Branch 09 trips | 19 | Section switch 3DL closes a floodgate |
| 10 | Branch 10 trips |
In table 4: 1 is closed solution Huantiao 3DL for section switch 3DL tripping, a remote control distant place, and 2 disconnected for electric power incoming line 1
Solution Huantiao 1DL is closed in road device 1DL tripping, a remote control distant place, and 3 are closed and unlinked for 2 breaker 2DL of electric power incoming line tripping, a remote control distant place
Jump 2DL
2, related relay protective scheme and realization
The bus differential protection device of 110kV integration protective device, sectionalised protection device, backup auto-activating device, power supply conjunction are unlinked
Function logic required for device is configured by following requirements.
The realization of 2.1 110kV prepared auto restart typical logics
The prepared auto restart typical logic of single-trunk segmental wiring can be used by State Intellectual Property Office's granted patent
The control logic of " method that ZL03113301.0 microcomputer control standby power automatically engages ".
2.2 110kV bus differential protectings and locking 110kV prepared auto restart control method
When the inlet wire route two sides 110kV of the 110kV substation using single-trunk segmental wiring use optical fiber differential protective
When, bus differential protection logic can be used in mother's 110kV difference of the 110kV substation of the single-trunk segmental wiring are as follows: any bus-bar fault,
110kV segmentation (mother) switch is first jumped, then jumps fault bus upper switch, as shown in Figure 6.
2.2.1 bus differential protection action jumps I section of bus breaker and is latched the control that No. 1 power circuit breaker closes a floodgate simultaneously are as follows:
Barring condition 1:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of I section of bus of the 110kV without segmented current.
(3) the big differential relay movement of the female difference of 110kV；
(4) section switch is in open position
After above-mentioned condition meets, bus differential protection action jumps I section of bus breaker and is latched No. 1 power circuit breaker conjunction simultaneously
Lock.
Barring condition 2
1) T time clearing signal condition is exported
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of II section of bus of the 110kV containing segmented current；
(3) the big differential relay movement of the female difference of 110kV；
When above-mentioned (1)-(3) condition whole satisfaction, T time clearing signal is exported；
2) barring condition 2
(1) when (1)-(3) condition either condition of above-mentioned 1.2.1 is unsatisfactory for, i.e. the female poor II section of bus of 110kV it is small it is differential after
Electric appliance or 110kV II section of bus composite voltage element of female big differential relay or 110kV of difference, become returning from acting originally；
(2) there is output T time clearing signal
(3) when section switch 3DL becomes open position from closing position；
(4) the small differential relay of the female poor II section of bus of the 110kV without segmented current is not operating；
(5) I section of bus compound voltage lockout of 110kV is open；
(6) the big differential relay movement of the female difference of 110kV；
(7) the phase current elements being segmented are more than setting valve or zero-sequence current component element is more than setting valve.
After above-mentioned condition all meets, after delay t1 delay, bus differential protection action is jumped I section of bus breaker and is latched simultaneously
No. 1 power circuit breaker closes a floodgate.
Output open hour T takes 200-300 milliseconds；Delay t1 takes 20-40 milliseconds.
Barring condition 3
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
(3) prepared auto restart starts No. 1 electric power incoming line breaker 1DL and closes a floodgate；
(4) No. 1 electric power incoming line breaker 1DL become closing position from open position；
The phase current element of (5) No. 1 electric power incoming lines is more than setting valve or zero-sequence current component is more than setting valve.
After above-mentioned condition all meets, bus differential protection action jumps I section of bus breaker and is latched No. 1 power circuit breaker simultaneously
It closes a floodgate.
2.2.2 bus differential protection action jumps II section of bus breaker and is latched the control that No. 2 power circuit breakers close a floodgate simultaneously are as follows:
Barring condition 1
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of II section of bus of the 110kV without segmented current；
(3) the big differential relay movement of the female difference of 110kV；
(4) section switch is in open position
After above-mentioned condition meets, bus differential protection action jumps I section of bus breaker and is latched No. 2 power circuit breakers conjunctions simultaneously
Lock.
Barring condition 2
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
(3) prepared auto restart starts No. 2 electric power incoming line breaker 2DL and closes a floodgate；
(4) No. 2 electric power incoming line breaker 2DL become closing position from open position；
The phase current element of (5) No. 2 electric power incoming lines is more than setting valve or zero-sequence current component is more than setting valve.
After above-mentioned condition all meets, bus differential protection action jumps I section of bus breaker and is latched No. 1 power circuit breaker simultaneously
It closes a floodgate.
2.2.3 the control that bus differential protection action locking section switch closes a floodgate are as follows:
Barring condition 1:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
(3) the female poor small differential relay movement of I section of bus of the 110kV containing segmented current；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously.
Barring condition 2:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of I section of bus of the 110kV without segmented current；
(3) the big differential relay movement of the female difference of 110kV；
(4) section switch is in open position
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously.
Barring condition 3:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
(3) the female poor small differential relay movement of II section of bus of the 110kV containing segmented current；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously.
Barring condition 4:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of II section of bus of the 110kV without segmented current；
(3) the big differential relay movement of the female difference of 110kV；
(4) section switch is in open position
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously.
Barring condition 5:
(1) the big differential relay movement of the female difference of 110kV；
(2) I section of bus compound voltage lockout of 110kV is open or II section of bus compound voltage lockout of 110kV is open.
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously.
2.2.4 the related adjusting and requirement protected in barring condition 1,2
(1) in barring condition 1,2, the phase current element definite value of segmentation or No. 1 electric power incoming line or No. 2 electric power incoming lines is by escaping
The maximum for flowing through this protection in this electric substation or 110kV outlet route in electric substation's maximum transformer, when low-voltage bus bar short circuit is short
Road current calibration:
(1) in formula,It is maximum for electric substation in this electric substation under system maximum operational mode or 110kV outlet route
The maximum short circuit current of this protection, K are flowed through in transformer, when low-voltage bus bar short circuitkFor safety factor, 1.3~1.5 are generally taken.
The zero-sequence current component definite value of segmentation or No. 1 electric power incoming line presses the small mode 110kV bus singlephase earth fault of system
There is >=1.5 times of sensitivity adjusting:
(2) in formula formula,For 110kV bus single-phase short circuit current, K under system minimum operational modelmFor sensitive system
Number, generally takes 1.5.
(2) the phase current element of segmentation or No. 1 electric power incoming line or No. 2 electric power incoming lines takes the phase current of A phase, B phase, C phase.
(3) the phase current element and zero-sequence current component requirement band directional element of number electric power incoming line or No. 2 electric power incoming lines, side
It is directed toward to element: bus is directed toward by route.
The realization of 2.3 110kV block switches protection typical logic
Q/GDW 10766-2015 can be used in 110kV block switch protection typical logic, and " 10kV~110 (66) kV route is protected
Shield and auxiliary device standardized designs specification " 110kV block switch protect typical logic.
Solution loop device logic is quickly closed in 2.4 sequencing
Solution loop device control logic is quickly closed using the sequencing of authorization patent of invention ZL200710020149.6.
3, bus differential protection device, sectionalised protection device, backup auto-activating device in the protection of 110kV integration protective device etc. are protected
Shield definite value carries out unified consideration, is shown in Table 5~table 7
A, definite value is protected
Table 5,110kV integration protective device protect definite value allocation list
| Serial number | Definite value title | Serial number | Definite value title |
| 1 | Differential protection starting current definite value | 11 | Main power supply is without pressure definite value |
| 2 | CT broken string alarm definite value | 12 | Backup power source has pressure definite value |
| 3 | CT breakage lock device definite value | 13 | Combined floodgate checkout voltage definite value |
| 4 | Mother is segmented failure current ration | 14 | 1 no flow setpoint of power supply |
| 5 | Mother is segmented dead time | 15 | 2 no flow setpoint of power supply |
| 6 | Charge I section of current ration of overcurrent | 16 | 1 trip time of power supply |
| 7 | It charges I time of overcurrent | 17 | 2 trip time of power supply |
| 8 | Charge II section of current ration of overcurrent | 18 | Backup power source closing time |
| 9 | Charge zero sequence overcurrent definite value | 19 | The ring-closing selective tripping 1DL time |
| 10 | It charges II time of overcurrent | 20 | The ring-closing selective tripping 2DL time |
| 21 | The ring-closing selective tripping 3DL time |
In table 4,1~5 is bus differential protecting definite value, and 6~10 are sectionalised protection definite value, and 11~21 are prepared auto restart
And close definite value of unlinking
B, control word
Table 6,110kV integration protective device control word definite value allocation list
| Serial number | Definite value title | Serial number | Definite value title |
| 1 | Differential protection | 5 | Backup power automatic switching function |
| 2 | I section of mother step charge overcurrent | 6 | Close solution ring function |
| 3 | II section of mother step charge overcurrent | 7 | Separating brake inspection has pressure |
| 4 | Mother step charge zero sequence overcurrent | 8 | Combined floodgate checkout voltage |
In table 5,1 is bus differential protecting control word definite value, and 2~4 are sectionalised protection control word definite value, and 5~8 are
Prepared auto restart and conjunction are unlinked control word definite value
C, soft pressing plate
Table 7,110kV integration protective device soft pressing plate definite value allocation list
In table 6,1~2 be bus differential protecting soft pressing plate definite value, 3~5 be sectionalised protection soft pressing plate definite value, 6~10
Item is prepared auto restart and closes soft pressing plate definite value of unlinking, and 11~13 are public soft pressing plate definite value
4, the configuration of higher level substation source side route protection and adjusting require
4.1 higher level substation source side route protection configuration requirements
Power circuit configuration fibre-optic current differential protection, I section~III section of phase spacing protection and the ground connection of higher level substation
I section~III section of distance protection, I section~III section of zero-sequence current protection and reclosing.
When the power circuit is short-term road (≤5km), the power circuit of higher level substation must configure and adjust optical fiber
Current differential protection.
The adjusting of 4.2 higher level substation source side route protections requires
It wherein deactivates for I section of zero-sequence current, I section of phase spacing protection, I section of ground distance and II section of phase spacing protection connect
The adjusting of II section of ground distance, II section of zero-sequence current requires as follows:
(1) I section of phase spacing, I section of ground distance protection
It is adjusted by this line end failure is escaped:
Zzd≤KKZL (3)
(3) K in formulaKFor safety factor, 0.7~0.8 is generally taken.
I section of phase spacing, I section of the ground distance delay protected are 0s；
When the power circuit is short-term road (≤5km), I section of phase spacing, I section of ground distance protection can not whole stopping at fixed time
With.Its defencive function is served as by the fibre-optic current differential protection of configuration complete fibre function.
(2) II section of phase spacing, II section of ground distance protection
By escape on this electric substation or 110kV outlet route in electric substation's maximum transformer, low-voltage bus bar short circuit Shi Benbao
The minimum measurement impedance setting of shield:
Zzd≤KKZL+KKbZb (4)
(4) K in formulaK、KKbFor safety factor, 0.7~0.8, Z is generally takenLFor line impedance, ZbFor transformer impedance.
II section of phase spacing, II section of the ground distance delay protected are 0.3s.
(3) II section of zero-sequence current
There is enough sensitivity to adjust by this line end failure:
(5) in formula formula,For 110kV bus single-phase short circuit current, K under system minimum operational modelmFor sensitive system
Number, generally takes 1.5.
The delay of II section of zero-sequence current protection is 0.3s.
It is adjusted by above-mentioned requirements, I section of phase spacing protection and I section of ground distance of protection protection scope are route route
70%~80%, II section of phase spacing protection, II section of ground distance protection, II section of zero-sequence current of protection scope are that this route is complete
Portion, and the high-voltage winding part of junior's route or main transformer is protruded into, it is delayed as 0.3s.
5, by the implementation of the above method, the present apparatus realizes 110kV bus differential protection device, 110kV sectionalised protection device
With 110kV backup auto-activating device function, expansion realizes sequencing power supply and quickly closes the utilization unlinked.
6, the solution of the present invention meets following primary connection circuit:
(1) 110kV electric substation 110kV sectionalized single busbar connection primary connection circuit；
(2) 220kV electric substation 110kV double-bus primary connection circuit；
(3) 220kV electric substation 110kV sectionalized single busbar connection primary connection circuit.
7, platform software model is designed using Target-oriented thought, with operation and data that class is applied, to guarantee application
Safety, reusability.Each module application program is packaged in the form of element；Each application program can divide several
Element is realized；Element is both the unit of function division and the unit of code reuse, help to improve code reusability, can
Maintainability, readability.
In addition to the implementation, the present invention can also have other embodiments, all to use equivalent substitution or equivalent transformation shape
At technical solution, be all fallen within the protection domain of application claims.
Claims (4)
1. a kind of guard method of 110kV single-trunk segmental wiring integration protective device, electric substation's 110kV sectionalized single busbar connection connect
Line integration protective device includes bus differential protection device, sectionalised protection device, backup auto-activating device, power supply conjunction solution loop device, spy
Sign is that bus differential protection method is as follows:
Bus differential protection action jumps I section of bus breaker and is latched the control that No. 1 power circuit breaker closes a floodgate simultaneously are as follows:
Barring condition 1:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of I section of bus of the 110kV without segmented current；
(3) the big differential relay movement of the female difference of 110kV；
(4) section switch is in open position；
After above-mentioned condition meets, bus differential protection action jumps I section of bus breaker and is latched No. 1 power circuit breaker combined floodgate simultaneously；
Barring condition 2:
1) T time clearing signal condition is exported:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of II section of bus of the 110kV containing segmented current；
(3) the big differential relay movement of the female difference of 110kV；
When above-mentioned (1)-(3) condition whole satisfaction, T time clearing signal is exported；
2) barring condition:
(1) when above-mentioned (1)-(3), condition either condition is unsatisfactory for, and the small differential relay of the poor II section of bus of 110kV mother or 110kV are female
II section of bus composite voltage element of poor big differential relay or 110kV, becomes returning from acting originally；
(2) there is output T time clearing signal；
(3) when section switch 3DL becomes open position from closing position；
(4) the small differential relay of the female poor II section of bus of the 110kV without segmented current is not operating；
(5) I section of bus compound voltage lockout of 110kV is open；
(6) the big differential relay movement of the female difference of 110kV；
(7) the phase current elements being segmented are more than setting valve or zero-sequence current component element is more than setting valve；
After above-mentioned condition all meets, after delay t1 delay, bus differential protection action jumps I section of bus breaker and is latched No. 1 simultaneously
Power circuit breaker closes a floodgate；
Barring condition 3:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
(3) prepared auto restart starts No. 1 electric power incoming line breaker 1DL and closes a floodgate；
(4) No. 1 electric power incoming line breaker 1DL become closing position from open position；
The phase current element of (5) No. 1 electric power incoming lines is more than setting valve or zero-sequence current component is more than setting valve；
After above-mentioned condition all meets, bus differential protection action jumps I section of bus breaker, and No. 1 power circuit breaker of locking is closed simultaneously
Lock；
Bus differential protection action jumps II section of bus breaker and is latched the control method that No. 2 power circuit breakers close a floodgate simultaneously are as follows:
Barring condition 1:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of II section of bus of the 110kV without segmented current；
(3) the big differential relay movement of the female difference of 110kV；
(4) section switch is in open position
After above-mentioned condition meets, bus differential protection action jumps I section of bus breaker and is latched No. 2 power circuit breakers combined floodgates simultaneously；
Barring condition 2:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
(3) prepared auto restart starts No. 2 electric power incoming line breaker 2DL and closes a floodgate；
(4) No. 2 electric power incoming line breaker 2DL become closing position from open position；
The phase current element of (5) No. 2 electric power incoming lines is more than setting valve or zero-sequence current component is more than setting valve；
After above-mentioned condition all meets, bus differential protection action jumps I section of bus breaker, and No. 1 power circuit breaker of locking is closed simultaneously
Lock；
Bus differential protection action is latched the control method that section switch closes a floodgate are as follows:
Barring condition 1:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
(3) the female poor small differential relay movement of I section of bus of the 110kV containing segmented current；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously；
Barring condition 2:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of I section of bus of the 110kV without segmented current；
(3) the big differential relay movement of the female difference of 110kV；
(4) section switch is in open position；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously；
Barring condition 3:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
(3) the female poor small differential relay movement of II section of bus of the 110kV containing segmented current；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously；
Barring condition 4:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of II section of bus of the 110kV without segmented current；
(3) the big differential relay movement of the female difference of 110kV；
(4) section switch is in open position；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously；
Barring condition 5:
(1) the big differential relay movement of the female difference of 110kV；
(2) I section of bus compound voltage lockout of 110kV is open or II section of bus compound voltage lockout of 110kV is open；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously.
2. the guard method of 110kV single-trunk segmental wiring integration protective device as described in claim 1, feature exist
In adjusting requires as follows in barring condition 1,2:
(1) in barring condition 1,2, the phase current element definite value of segmentation or No. 1 electric power incoming line or No. 2 electric power incoming lines is by escaping this change
The maximum short-circuit electric of this protection is flowed through in electric institute or 110kV outlet route in electric substation's maximum transformer, when low-voltage bus bar short circuit
Stream adjusting:
(1) in formula,For electric substation's maximum transformation in this electric substation under system maximum operational mode or 110kV outlet route
The maximum short circuit current of this protection, K are flowed through in device, when low-voltage bus bar short circuitkFor safety factor, 1.3~1.5 are taken；
The zero-sequence current component definite value of segmentation or No. 1 electric power incoming line has by the small mode 110kV bus singlephase earth fault of system >=
1.5 times of sensitivity adjusting:
(2) in formula,For 110kV bus single-phase short circuit current, K under system minimum operational modelmFor sensitivity coefficient, take
1.5；
(2) the phase current element of segmentation or No. 1 electric power incoming line or No. 2 electric power incoming lines takes the phase current of A phase, B phase, C phase；
The phase current element and zero-sequence current component requirement band directional element of (3) No. 1 electric power incoming lines or No. 2 electric power incoming lines, direction
Element is directed toward: being directed toward bus by route.
3. the guard method of 110kV single-trunk segmental wiring integration protective device as described in claim 1, feature exist
In,
The output open hour T takes 200-300 milliseconds；Delay t1 takes 20-40 milliseconds.
4. the guard method of 110kV single-trunk segmental wiring integration protective device as described in claim 1, feature exist
In the configuration of higher level substation source side route protection and adjusting requirement are as follows:
Higher level substation source side route protection configuration requirement:
Power circuit configuration fibre-optic current differential protection, I section~III section of phase spacing protection and the ground distance I of higher level substation
Section~III section of protection, I section~III section of zero-sequence current protection and reclosing；
When the power circuit is short-term road, and length is less than or equal to 5km, the power circuit of higher level substation must be configured and be adjusted
Fibre-optic current differential protection；
The adjusting of higher level substation source side route protection requires:
Wherein I section of zero-sequence current deactivate, I section of phase spacing protection, I section of ground distance and II section of phase spacing protection, be grounded away from
Adjusting from II section, II section of zero-sequence current requires as follows:
(1) I section of phase spacing, I section of ground distance protection:
It is adjusted by this line end failure is escaped:
Zzd≤KKZL (3)
(3) K in formulaKFor safety factor, 0.7~0.8 is taken；
I section of phase spacing, I section of the ground distance delay protected are 0s；
When the power circuit is short-term road, and length is less than or equal to 5km, I section of phase spacing, I section of ground distance protection can not be whole
Timing deactivates, and defencive function is served as by the fibre-optic current differential protection of configuration complete fibre function；
(2) II section of phase spacing, II section of ground distance protection:
By escape on this electric substation or 110kV outlet route in electric substation's maximum transformer, low-voltage bus bar short circuit when this protection most
Small measurement impedance setting:
Zzd≤KKZL+KKbZb (4)
(4) K in formulaK、KKbFor safety factor, 0.7~0.8, Z is takenLFor line impedance, ZbFor transformer impedance；
II section of phase spacing, II section of the ground distance delay protected are 0.3s；
(3) II section of zero-sequence current
There is enough sensitivity to adjust by this line end failure:
(5) in formula formula,For 110kV bus single-phase short circuit current, K under system minimum operational modelmFor sensitivity coefficient, take
1.5；
The delay of II section of zero-sequence current protection is 0.3s；
It is adjusted by above-mentioned requirements, I section of phase spacing protection and I section of ground distance of protection protection scope are the 70% of route route
~80%, II section of phase spacing protection, II section of ground distance protection, II section of zero-sequence current of protection scope are that this route is whole,
And the high-voltage winding part of junior's route or main transformer is protruded into, it is delayed as 0.3s.
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| CN110364996A (en) * | 2019-07-24 | 2019-10-22 | 国家电网有限公司 | Improve the protective device of station service power supply reliability |
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| CN110729709A (en) * | 2019-11-28 | 2020-01-24 | 国网江苏省电力有限公司镇江供电分公司 | 110kV line disconnection relay protection method for measuring neutral point voltage of transformer |
| CN110829390A (en) * | 2019-11-28 | 2020-02-21 | 国网江苏省电力有限公司镇江供电分公司 | 110kV wire break protection method for measuring load side voltage and matching with spare power automatic switching |
| CN110829390B (en) * | 2019-11-28 | 2020-11-10 | 国网江苏省电力有限公司镇江供电分公司 | 110kV wire break protection method for measuring load side voltage and matching with spare power automatic switching |
| CN110729709B (en) * | 2019-11-28 | 2020-12-15 | 国网江苏省电力有限公司镇江供电分公司 | 110kV line disconnection relay protection method for measuring neutral point voltage of transformer |
| CN110676823B (en) * | 2019-11-28 | 2021-03-02 | 国网江苏省电力有限公司镇江供电分公司 | 110kV line disconnection relay protection method |
| CN113241844A (en) * | 2021-06-23 | 2021-08-10 | 广东电网有限责任公司 | 10kV bus sectional spare power automatic switching method and device |
| CN113241844B (en) * | 2021-06-23 | 2022-06-14 | 广东电网有限责任公司 | 10kV bus sectional spare power automatic switching method and device |
| CN114204524A (en) * | 2021-11-29 | 2022-03-18 | 国网江苏省电力有限公司南京供电分公司 | Low-resistance self-adaptive brake-separating method and device |
| CN114204524B (en) * | 2021-11-29 | 2024-09-03 | 国网江苏省电力有限公司南京供电分公司 | Low-resistance self-adaptive brake separating method and device |
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