CN117452800A - Automatic control method for wiring and string-entering equipment of 500kV 3/2 circuit breaker of hydropower station - Google Patents
Automatic control method for wiring and string-entering equipment of 500kV 3/2 circuit breaker of hydropower station Download PDFInfo
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- CN117452800A CN117452800A CN202311389384.6A CN202311389384A CN117452800A CN 117452800 A CN117452800 A CN 117452800A CN 202311389384 A CN202311389384 A CN 202311389384A CN 117452800 A CN117452800 A CN 117452800A
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000002955 isolation Methods 0.000 claims description 26
- 238000012544 monitoring process Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 13
- 230000005540 biological transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B9/00—Safety arrangements
- G05B9/02—Safety arrangements electric
- G05B9/03—Safety arrangements electric with multiple-channel loop, i.e. redundant control systems
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Abstract
An automatic control method for a 500kV 3/2 breaker wiring string feeding device of a hydropower station comprises a cold standby transportation method of the string feeding device, wherein the cold standby transportation method of the string feeding device comprises the following steps: step 1, after receiving an operation method starting command, manually confirming that the incoming line short-circuit protection and the circuit breaker protection are put into: if the condition is not satisfied, prompting that the operation fails and alarming to exit the operation method, and if the condition is satisfied, performing the next step; step 2, judging whether the following operation conditions are provided: according to the invention, by setting a scientific and reasonable control method, the operation of the 500kV 3/2 circuit breaker wiring and string feeding equipment by the circuit breaker, the disconnecting link, the ground knife and other equipment in the operation process of the overhaul and transportation operation is judged and executed, so that the operation time can be shortened, the workload of operators can be reduced, the whole operation process can be ensured to be accurate, and the safety production management level of a power plant can be improved.
Description
Technical Field
The invention relates to an automatic control method for a 500kV hydropower station running-to-overhauling monitoring system.
Background
Currently, under the main wiring condition of 500kV 3/2 wiring, the string feeding equipment is operated by primary equipment of an overhaul and transfer line, after the operation condition is met, an operator generally operates on site of a monitoring system and equipment, and the whole operation process is carried out by the operator. Under the condition that an operator performs 500kV 3/2 wiring main wiring, when the string feeding equipment is operated by the primary equipment of the overhaul and transfer line, double confirmation of an operator monitoring system and an equipment site is required before and after each operation step, and high requirements are provided for the operation sequence of the equipment. When the operation sequence is wrong and the equipment operation locking fails, the system is possibly grounded in a live mode or equipment is possibly damaged, and hidden danger is brought to safe and stable operation of the power grid.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an automatic control method for a 500kV hydropower station string-feeding and running-to-overhauling monitoring system, which is characterized in that the operation of 500kV 3/2 circuit breaker wiring string-feeding equipment by circuit breakers, disconnecting links, ground knives and other equipment in the overhauling and running operation process is judged and executed by setting a scientific and reasonable control method, so that the operation time is shortened, the workload of operators is reduced, the whole operation process is ensured to be accurate, and the safety production management level of a power plant is improved.
In order to solve the problems, the technical scheme of the invention is as follows:
an automatic control method for a 500kV 3/2 breaker wiring string feeding device of a hydropower station comprises a cold standby transportation method of the string feeding device, wherein the cold standby transportation method of the string feeding device comprises the following steps:
step 1, after receiving an operation method starting command, manually confirming that the incoming line short-circuit protection and the circuit breaker protection are put into: if the condition is not satisfied, prompting that the operation fails and alarming to exit the operation method, and if the condition is satisfied, performing the next step;
step 2, judging whether the following operation conditions are provided: the incoming line disconnecting link and each isolation disconnecting link have closing conditions, the control mode of the circuit breaker and the isolation disconnecting link is remote, the circuit breaker and the isolation disconnecting link have no faults, the LCU has no faults, the incoming line short-circuit protection is normal, and the circuit breaker protection is normal: if the existence condition is not satisfied, alarming and exiting the operation method: if the conditions are met, the operation method enters the next step;
step 3, starting to close the incoming line disconnecting link, and confirming that the state of the incoming line disconnecting link is at a closing position: if not, prompting that the operation fails and alarming to exit the operation method, and if the condition is satisfied, performing the next step;
and step 4, sequentially issuing two side isolation disconnecting links for closing the wire inlet side switch, and confirming that the states of the two side isolation disconnecting links of the wire inlet side switch are all in the closing position. If the existence condition is not satisfied, prompting the operation failure and warning to exit the operation method; if the conditions are satisfied, the next step is performed.
Step 5, judging that the outlet side switch is not at the opening position, and if the outlet side switch is at the opening position, directly entering the next step; if the switch is at the switch-on position, sequentially sending the isolation disconnecting link at the two sides of the switch in the switch-on state, and confirming that the isolation disconnecting link at the two sides of the switch in the switch-on state is at the switch-on position: if the existence condition is not satisfied, prompting the operation failure and warning to exit the operation method; if the conditions are satisfied, performing the next step;
step 6, judging that the incoming line side switch has a closing condition, commanding the incoming line side switch to be closed, and confirming that the circuit breaker is normally closed: if the condition is not satisfied, prompting that the operation fails and alarming to exit the operation method; if the condition is satisfied, the next step is carried out;
step 7, judging whether the two sides of the switch are isolated from each other in the step 5, if not, ending the method; if the switch is executed, judging that the middle switch has a closing condition, commanding the middle switch to be closed at the same time, and confirming that the closing of the circuit breaker is normal; if the condition is not satisfied, prompting the operation failure and alarming to exit the operation; and if the condition is met, ending.
The beneficial effects of the invention are as follows:
the invention discloses an automatic operation method of a monitoring system of a service and transportation operation of a stringing device under the condition of 500kV 3/2 wiring main wiring of a hydropower station. The operation of manual operation by operators in the whole process is changed into a one-key automatic operation method, the operation time is shortened, the workload of the operators is lightened, the manual misoperation can be avoided, the whole operation process is ensured to be accurate, and the safety and stability of the power grid are ensured.
Drawings
The invention is further described with reference to the accompanying drawings:
figure 1 is a logic diagram of the present invention regarding "run in equipment enabled by service to cold standby operation",
figure 2 is a logic diagram of the present invention regarding "incoming line device enabled by cold standby transfer operation",
figure 3 is a logic diagram of the present invention regarding "incoming side switch X1 breaker on",
figure 4 is a logic diagram of the invention with respect to a "medium switch X2 breaker",
figure 5 is a diagram of a method for changing the overhauling operation of the stringing equipment into the cold standby operation,
FIG. 6 is a diagram of a method of operating a cold standby transfer line in connection with a stringing apparatus according to the present invention
Fig. 7 is an electrical diagram of the present invention.
Detailed Description
The automatic control method for the 500kV hydropower station in-line operation-to-overhaul monitoring system comprises the following steps:
1. the method for changing 500kV 3/2 breaker wiring into series equipment from overhauling to cooling is as follows:
step 1, after receiving an operation method start command, judging whether the following operation conditions are met: the grounding knife switches X117, X127, X217 and X227 on the two sides of the incoming line side switch X1 and the middle switch X2 and the grounding knife switches X167 and X1617 on the two sides of the incoming line knife switch X16 have the switch-off condition, the incoming line short lead protection is withdrawn, the grounding knife switch control mode is far away, the grounding knife switch has no fault, and the LCU has no fault. If the existence condition is not satisfied, alarming and exiting the operation method; if the above conditions are satisfied, the operation flow proceeds to the next step.
Step 2, sequentially starting the grounding knife switches X117, X127, X217 and X227 on two sides of the wire-pulling side switch X1 and the middle switch X2 and the grounding knife switches X167 and X1617 on two sides of the X16, and confirming that the grounding knife switch states are all in the switch-off positions. If the existence condition is not satisfied, prompting the operation failure and alarming to exit the operation flow; if all the conditions are satisfied, the process is ended.
2. The method for the 500kV 3/2 breaker wiring and stringing equipment comprises the following steps of:
and step 1, after receiving an operation method starting command, manually confirming that the incoming line short-circuit protection and the circuit breaker protection are put into operation. If the condition is not satisfied, prompting the operation failure and alarming to exit the operation flow, and if the condition is satisfied, proceeding to the next step.
Step 2, judging whether the following operation conditions are provided: the incoming line disconnecting link X16, the isolation disconnecting links X11, X12, X21 and X22 have closing conditions, the control mode of the circuit breaker and the isolation disconnecting link is far away, the circuit breaker and the isolation disconnecting link have no faults, the LCU has no faults, the incoming line short-circuit protection is normal, and the circuit breaker protection is normal. If the existence condition is not satisfied, alarming and exiting the operation flow; if the above conditions are satisfied, the operation flow proceeds to the next step.
And 3, starting to close the wire inlet disconnecting link X16, and confirming that the state of the wire inlet disconnecting link X16 is at the closing position. If not, prompting the operation failure and alarming to exit the operation flow, and if the condition is satisfied, performing the next step.
And 4, sequentially issuing two side isolation disconnecting switches X11 and X12 of the on-line side switch X1 (pushing the isolating disconnecting switch on the bus side of the circuit breaker preferentially, pushing the isolating disconnecting switch on the circuit line side of the circuit breaker, and conforming to the principle of power supply side-load side power transmission), and confirming that the states of the two side isolation disconnecting switches X11 and X12 are both in the on-position. If the existence condition is not satisfied, prompting the operation failure and alarming to exit the operation flow; if the conditions are satisfied, the next step is performed.
Step 5, judging that the outlet side switch X3 is not at the opening position, and if the outlet side switch X3 is at the opening position, directly entering the next step; if the switch is at the closing position, the two sides of the switch X2 are sequentially issued to isolate the disconnecting link X21 and X22, and the states of the disconnecting links X21 and X22 are confirmed to be at the closing position. If the existence condition is not satisfied, prompting the operation failure and alarming to exit the operation flow; if the conditions are satisfied, the next step is performed.
And 6, judging that the incoming line side switch X1 has a closing condition, and starting to close the incoming line side switch X1 to confirm that the circuit breaker is normally closed. If the condition is not satisfied, prompting that the operation fails and alarming to exit the operation flow; if the condition is satisfied, the next step is performed.
Step 7, judging whether to execute the isolation knife switches X21 and X22 on the two sides of the switch X2 in the step 5, and ending the flow if not executing; if the switch X2 is judged to have a closing condition, the switch X2 is closed at the same time by a command, and the normal closing of the circuit breaker is confirmed. If the condition is not satisfied, prompting that the operation fails and alarming to exit the operation flow; if the condition is satisfied, the process is ended.
Description: the automatic operation flow of the overhaul transfer line monitoring system of the 500kV 3/2 circuit breaker wiring string feeding equipment is designed into a flow with two stages in sequence, the second stage flow is blocked by the first stage flow, and the second stage flow can be started only after the execution of the first stage flow is finished.
The button of the 500kV 3/2 breaker wiring string entering equipment transfer operation is designed in the computer monitoring system, and two buttons of the method for overhauling the string entering equipment to change to cold standby and the method for changing the string entering equipment to cold standby are displayed after the button is turned on for the operator to select operation. Meanwhile, a logic diagram is designed in the computer monitoring system to judge whether basic operation conditions in the first stage are met, wherein the basic operation conditions comprise an X167 opening and closing condition OK, an X1617 opening and closing condition OK, an X117 opening and closing condition OK, an X127 opening and closing condition OK, an X217 opening and closing condition OK, an X227 opening and closing condition OK, an incoming line short lead protection exit, a grounding disconnecting link control mode in a far distance, a grounding disconnecting link failure-free mode and an LCU failure-free mode are all met, and then the situation that the series equipment is changed from overhauling to cold standby is lightened to prompt an operator to operate by one key is lightened. The logic diagram is designed in the computer monitoring system to judge whether the basic operation conditions of the second stage are met, wherein the conditions of 'X16 opening and closing condition OK', 'X11 opening and closing condition OK', 'X12 opening and closing condition OK', 'X21 opening and closing condition OK', 'X22 opening and closing condition OK', 'circuit breaker control mode is far away', 'circuit breaker is fault-free', 'LCU is fault-free', 'line incoming short-circuit protection normal', 'circuit breaker protection normal' are all met, and then 'the operation of the string entering equipment is met by cold standby operation', and an operator is prompted to operate by one key.
In the first stage automatic operation flow step 1, the "ground disconnecting link X117, X127, X217, X227 on both sides of X1, X2 and the ground disconnecting link X167, X1617 on both sides of X16 have the disconnecting conditions" that is, the isolating disconnecting link X11, X12 on both sides of X1 is required to be in the disconnecting position, the isolating disconnecting link X21, X22 on both sides of X2 is required to be in the disconnecting position, and the incoming disconnecting link X16 and the group outlet disconnecting link F11, F21 are all in the disconnecting position. Meanwhile, four conditions of 'the protection and exit of the incoming short lead', 'the no fault of the LCU', 'the control mode of the grounding switch is far away', 'the no fault of the grounding switch' are all satisfied, and the subsequent operation can be performed. The logic diagram is shown in figure 1.
In the first stage automatic operation flow step 2, the grounding knife switches X117, X127, X217, X227 on both sides of X1, X2 and the grounding knife switches X167, X1617 on both sides of X16 are pulled apart, and the circuit breakers X1, X2 are turned into cold standby operation.
When the equipment is in an overhaul state, the related protection of 'incoming line short-difference protection' and 'circuit breaker protection' are in an exit state, and the related equipment is in a cold standby state through a first-stage automatic operation method, so that the related protection is needed to be put into before the operation of the string entering equipment. In the second-stage automatic operation flow step 1, the input of the "incoming short-circuit protection" and the "breaker protection" is manually confirmed.
In the second stage automatic operation flow step 2, the "incoming line disconnecting link X16, the isolating disconnecting links X11, X12, X21, X22 have the closing condition", that is, the incoming line side switch X1 and the middle switch X2 are required to be at the opening positions, the group outlet disconnecting links F11, F21 are at the opening positions, and the grounding disconnecting links X117, X127, X217, X227 on both sides of the ii M bus grounding disconnecting links, X1, X2 and the grounding disconnecting links X167, X1617 on both sides of X16 are all at the opening positions. Meanwhile, the follow-up operation can be performed only when seven conditions of a circuit breaker control mode in a far place, an isolation disconnecting link control mode in a far place, a circuit breaker failure-free, an isolation disconnecting link failure-free, an LCU failure-free, normal line incoming short-circuit protection and normal circuit breaker protection are all met. The logic diagram is shown in fig. 2.
In the second stage automatic operation flow step 3, the wire inlet knife switch X16 is closed.
In the second stage automatic operation flow step 4, the isolating switches X11 and X12 on both sides of the incoming line side switch X1 are closed, and the isolating switch on the bus side of the circuit breaker is pushed first, and then the isolating switch on the load side of the circuit breaker is pushed, so as to meet the principle of power supply side-to-side load side power transmission.
In the second-stage automatic operation flow step 5, the switch X2 is determined to be able to be operated by determining that the outgoing line side switch X3 is not at the opening position. If the wire-outlet side switch X3 is at the opening position, the switch X2 and the two-side isolation knife switches X22 and X21 cannot be operated; if the outgoing line side switch X3 is at the closing position, the X22 and X21 are closed.
In the above-mentioned second stage automatic operation flow step 6, the closing method diagram of the incoming line side switch X1 is shown in fig. 3, and the incoming line side switch X1 is closed.
In the second stage automatic operation flow step 7, it is determined whether to close the middle switch X2 by determining whether to perform the "close the two side isolation knife switches X21, X22 of the middle switch X2" in step 5. If the X21 and X22 are already closed, the switch X2 is closed at the same time, and the closing method diagram of the switch X2 is shown in the figure 4.
Claims (3)
1. The automatic control method for the wiring string feeding equipment of the 500kV 3/2 circuit breaker of the hydropower station is characterized by comprising a cold standby transportation method of the string feeding equipment, and the cold standby transportation method of the string feeding equipment comprises the following steps:
step 1, after receiving an operation method starting command, manually confirming that the incoming line short-circuit protection and the circuit breaker protection are put into: if the condition is not satisfied, prompting that the operation fails and alarming to exit the operation flow, and if the condition is satisfied, performing the next step;
step 2, judging whether the following operation conditions are provided: the incoming line disconnecting link and each isolation disconnecting link have closing conditions, the control mode of the circuit breaker and the isolation disconnecting link is remote, the circuit breaker and the isolation disconnecting link have no faults, the LCU has no faults, the incoming line short-circuit protection is normal, and the circuit breaker protection is normal: if the existence condition is not satisfied, alarming and exiting the operation flow: if the conditions are met, the operation flow enters the next step;
step 3, starting to close the incoming line disconnecting link, and confirming that the state of the incoming line disconnecting link is at a closing position: if not, prompting that the operation fails and alarming to exit the operation flow, and if the condition is satisfied, performing the next step;
step 4, sequentially issuing two side isolation disconnecting links for closing the wire inlet side switch, and confirming that the states of the two side isolation disconnecting links of the wire inlet side switch are all in closing positions; if the existence condition is not satisfied, prompting the operation failure and alarming to exit the operation flow; if the conditions are satisfied, performing the next step;
step 5, judging that the outlet side switch is not at the opening position, and if the outlet side switch is at the opening position, directly entering the next step; if the switch is at the switch-on position, sequentially sending the isolation disconnecting link at the two sides of the switch in the switch-on state, and confirming that the isolation disconnecting link at the two sides of the switch in the switch-on state is at the switch-on position: if the existence condition is not satisfied, prompting the operation failure and alarming to exit the operation flow; if the conditions are satisfied, performing the next step;
step 6, judging that the incoming line side switch has a closing condition, commanding the incoming line side switch to be closed, and confirming that the circuit breaker is normally closed: if the condition is not satisfied, prompting that the operation fails and alarming to exit the operation flow; if the condition is satisfied, the next step is carried out;
step 7, judging whether the two-side isolation knife switch of the on-center switch is executed in the step 5, and ending the flow if the two-side isolation knife switch of the on-center switch is not executed; if the switch is executed, judging that the middle switch has a closing condition, commanding the middle switch to be closed at the same time, and confirming that the closing of the circuit breaker is normal; if the condition is not satisfied, prompting that the operation fails and alarming to exit the operation flow; if the condition is satisfied, the process is ended.
2. The automatic control method for a 500kV hydropower station in-line maintenance monitoring system, which is characterized by comprising the following steps of: the method for changing the equipment into the standby mode from overhauling to cooling is further included, and the method for changing the equipment into the standby mode from overhauling to cooling comprises the following steps:
step 1, after receiving an operation flow starting command, judging whether the following operation conditions are met: the wire inlet side switch, the grounding disconnecting link at the two sides of the middle switch and the grounding disconnecting link at the two sides of the wire inlet disconnecting link have a disconnecting link condition, the wire inlet short lead is protected to exit, the grounding disconnecting link is controlled in a remote way, the grounding disconnecting link has no fault, and the LCU has no fault; if the existence condition is not satisfied, alarming and exiting the operation flow; if the conditions are met, the operation flow enters the next step;
step 2, sequentially starting to pull open the wire inlet side switch, the grounding disconnecting link at two sides of the middle switch and the grounding disconnecting link at two sides of the wire inlet disconnecting link, and confirming that the grounding disconnecting link states are all at the disconnecting link positions; if the existence condition is not satisfied, prompting the operation failure and alarming to exit the operation flow; if all the conditions are satisfied, the process is ended.
3. The automatic control method for a 500kV hydropower station in-line maintenance monitoring system from operation to maintenance according to claim 1 or 2, which is characterized by comprising the following steps: in step 4, the isolating switch on the bus side of the circuit breaker is pushed up first, and then the isolating switch on the line side of the circuit breaker is pushed up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311389384.6A CN117452800A (en) | 2023-10-24 | 2023-10-24 | Automatic control method for wiring and string-entering equipment of 500kV 3/2 circuit breaker of hydropower station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311389384.6A CN117452800A (en) | 2023-10-24 | 2023-10-24 | Automatic control method for wiring and string-entering equipment of 500kV 3/2 circuit breaker of hydropower station |
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| Publication Number | Publication Date |
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| CN117452800A true CN117452800A (en) | 2024-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311389384.6A Pending CN117452800A (en) | 2023-10-24 | 2023-10-24 | Automatic control method for wiring and string-entering equipment of 500kV 3/2 circuit breaker of hydropower station |
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| Country | Link |
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| CN (1) | CN117452800A (en) |
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2023
- 2023-10-24 CN CN202311389384.6A patent/CN117452800A/en active Pending
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