CN110543388A - Thermal protection shutdown system of phase modifier and shutdown control method thereof - Google Patents
Thermal protection shutdown system of phase modifier and shutdown control method thereof Download PDFInfo
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- CN110543388A CN110543388A CN201910724561.9A CN201910724561A CN110543388A CN 110543388 A CN110543388 A CN 110543388A CN 201910724561 A CN201910724561 A CN 201910724561A CN 110543388 A CN110543388 A CN 110543388A
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- 239000003607 modifier Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 38
- 238000012544 monitoring process Methods 0.000 claims abstract description 25
- 230000001360 synchronised effect Effects 0.000 claims abstract description 14
- 239000010687 lubricating oil Substances 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000003745 diagnosis Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
- 239000000314 lubricant Substances 0.000 description 3
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- 238000013461 design Methods 0.000 description 1
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- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/2002—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant
- G06F11/2005—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant using redundant communication controllers
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Abstract
The invention discloses a phase modifier thermal protection shutdown system and a shutdown control method thereof, wherein the system comprises a master controller, a slave controller and three I/O units; the master controller and the slave controller are mutually standby and are in communication connection with the phase modulator monitoring system through a redundant monitoring network; the master controller is in communication connection with the slave controllers through a redundant synchronous network; each I/O unit is independent to each other and respectively collects thermotechnical protection shutdown signals; each I/O unit is provided with four network communication interfaces, one pair of network communication interfaces is in communication connection with the master controller through a redundant I/O network, and the other pair of network communication interfaces is in communication connection with the slave controller through the other redundant I/O network. The invention can obviously reduce the occurrence rate of false action and refusal action of protection action, is applied to a large 300Mvar phase modifier, can improve the reliability of thermal protection shutdown of the phase modifier, prevents the expansion of accidents, and ensures the safety of personnel and equipment.
Description
Technical Field
The invention relates to a phase modulator thermotechnical protection shutdown system and a shutdown control method thereof, belonging to the technical field.
Background
When the main and auxiliary equipment of the phase modifier is in fault which may cause serious consequences, the phase modifier thermal protection shutdown system can take corresponding measures to protect in time, avoid serious equipment damage and personal casualty accidents, and has very important function for improving the reliability and safety of the main and auxiliary equipment of the unit
The design of the prior thermodynamic protection shutdown system of the thermal power generating unit can not meet the process and the operation habit of a large 300Mvar phase modulation machine, and the thermodynamic protection shutdown system of the phase modulation machine is designed to meet the requirement of constructing the phase modulation machine in scale in order to ensure the operation safety of the phase modulation machine and improve the automation level of operation and need to combine the characteristics of the phase modulation machine.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a phase modulation machine thermal protection shutdown system and a shutdown control method thereof, and can ensure the safe operation of a phase modulation machine set.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
on one hand, the invention provides a phase modifier thermal protection shutdown system, which comprises a master controller, a slave controller and three I/O units;
the master controller and the slave controllers are mutually standby and are in communication connection with the phase modulator monitoring system through a redundant monitoring network; the master controller is in communication connection with the slave controllers through a redundant synchronous network;
The I/O units are mutually independent and respectively collect thermotechnical protection shutdown signals; each I/O unit is provided with four network communication interfaces, one pair of network communication interfaces is in communication connection with the master controller through a redundant I/O network, and the other pair of network communication interfaces is in communication connection with the slave controller through another redundant I/O network.
furthermore, the master controller, the slave controller and each I/O unit are provided with at least two power supply access ends, and each power supply access end is respectively connected with different power supplies.
Furthermore, a DO interface of each I/O unit is connected with four relays, and each relay is provided with a normally open contact and a normally closed contact; the three I/O units are grouped pairwise, each I/O unit is correspondingly connected with a pair of relays of the other I/O unit in the same group through a pair of relays, a pair of normally open contacts connected to the same I/O unit are connected in parallel with each other and then connected to a tripping outlet, and a pair of normally closed contacts are connected in series with a pair of normally closed contacts of the other I/O unit in the same group respectively to form a series node short circuit.
furthermore, the phase modulation monitoring system is provided with an HMI (human machine interface) station, and the phase modulation monitoring system checks information including a fault state, a fault diagnosis result and a trip action state through the HMI station and can acquire alarm information through the HMI station.
Furthermore, the switching value acquisition port of each I/O unit is connected with a switching instrument of the controlled equipment or a terminal contact of the controlled equipment; and the temperature signal acquisition port of each I/O unit is connected with a temperature acquisition element of the controlled equipment.
On the other hand, the invention provides a phase modifier thermal protection shutdown control method, which is realized by adopting any phase modifier thermal protection shutdown system, and comprises the following steps:
each I/O unit synchronously acquires a thermotechnical protection shutdown signal and synchronously uploads the thermotechnical protection shutdown signal to the master controller and the slave controller;
when the master controller is in a normal operation working state, the slave controller keeps the thermotechnical protection shutdown signal synchronous with the master controller through a redundant synchronous network, the master controller judges the protection action according to the thermotechnical protection shutdown signal, issues a shutdown protection instruction to a corresponding trip outlet of a thermotechnical protection shutdown system, and uploads the protection action judgment result to a phase modulator monitoring system; when the thermal protection acts, the DO relay of each I/O unit acts;
And when the master controller is in an abnormal operation working state, the slave controller judges the protection action according to the thermotechnical protection shutdown signal uploaded by each I/O unit and uploads the judgment result to the phase modulator monitoring system.
Furthermore, when the thermal protection shutdown signals uploaded by two I/O units are judged and a trip protection action is required to be executed, the main controller or the slave controller controls the trip protection action to be executed.
further, the thermal protection shutdown signal includes: the system comprises a vibration ultrahigh signal of a non-outlet end bearing, a vibration ultrahigh signal of a outlet end bearing, a too low stator cooling water flow signal, a too low rotor cooling water flow signal, a low pressure signal of a lubricating oil supply port, an overspeed signal of a phase modulator, a too low liquid level signal of a lubricating oil tank, an ultrahigh temperature signal of an outlet end bearing bush, an ultrahigh temperature signal of a non-outlet end bearing bush, a complete stop signal of an alternating-current lubricating oil pump and an emergency stop signal.
further, the method also comprises the step of carrying out slow signal protection processing on the temperature signal of the thermal protection shutdown signal.
Furthermore, the master controller and the slave controller preferentially issue a shutdown protection instruction according to a protection action priority principle.
Compared with the prior art, the phase modifier thermal protection shutdown system and the shutdown control method thereof provided by the invention can achieve the following beneficial effects:
Two controllers which are mutually standby and three I/O units which are mutually independent are configured, the three I/O units synchronously acquire thermotechnical protection shutdown signals, each I/O unit is provided with four network communication ports, one pair of network communication interfaces are in communication connection with the main controller through a redundant I/O network, the other pair of network communication interfaces are in communication connection with the slave controller through the other redundant I/O network, triple redundant configuration of the I/O units is realized, the occurrence rate of misoperation and refusal of protection actions can be obviously reduced, the phase-modulated; a redundant monitoring network, a redundant synchronous network and a redundant I/O network are configured, and the normal operation of the system is not influenced by the single network fault in the same redundant network.
Drawings
Fig. 1 is a schematic structural diagram of a phase modulation machine thermal protection shutdown system provided according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of the connection of a trip outlet to two of the I/O units provided in accordance with an embodiment of the present invention;
Fig. 3 is a circuit diagram of a trip outlet and a fault alarm of a phase modulator thermal protection shutdown system provided according to an embodiment of the present invention;
Fig. 4 is a logic block diagram of the main controller performing the I/O unit triplex determination on the low jump signal of the lubricant supply port pressure according to the embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the schematic structural diagram of a phase modulation machine thermal protection shutdown system provided in an embodiment of the present invention includes a master controller, a slave controller, and three I/O units.
Each I/O unit is independent to each other and respectively collects thermotechnical protection shutdown signals; each I/O unit is provided with four network communication interfaces, one pair of network communication interfaces is in communication connection with the master controller through a redundant I/O network, and the other pair of network communication interfaces is in communication connection with the slave controller through another redundant I/O network.
The main controller and the slave controller are mutually standby, and the two controllers are in communication connection through a redundant synchronous network. The master controller and the slave controller are in communication connection with the phase modulator monitoring system through a redundant monitoring network, and the phase modulator thermal protection shutdown system does not need to be provided with an independent HMI (human machine interface) station independently.
When the main controller can normally operate, the main controller and the slave controller synchronously acquire thermotechnical protection shutdown signals through the I/O units, in order to keep the signals of the two controllers synchronous, the slave controller acquires the acquired thermotechnical protection shutdown signals acquired by the main controller through a redundant synchronous network, the main controller judges protection actions according to the acquired thermotechnical protection shutdown signals, issues shutdown protection instructions to a trip outlet through the I/O units, and uploads protection action judgment results to a phase modulator monitoring system; when the master controller cannot normally operate, the slave controllers can be upgraded to the master controller to execute the operation steps of the master controller.
in the embodiment of the invention, three I/O units synchronously acquire thermotechnical protection shutdown signals, each I/O unit is provided with four network communication ports, one pair of network communication interfaces is in communication connection with a main controller through a redundant I/O network, and the other pair of network communication interfaces is in communication connection with a slave controller through another redundant I/O network, so that triple redundant configuration of the I/O units is realized, the occurrence rate of misoperation and refusal action of protection actions can be obviously reduced, the triple redundant configuration is applied to a large 300Mvar phase modulator, the reliability of thermotechnical protection shutdown of the phase modulator can be improved, the accident expansion is prevented, and the personal safety and the equipment safety are ensured; a redundant monitoring network, a redundant synchronous network and a redundant I/O network are configured, and the normal operation of the system is not influenced by the single network fault in the same redundant network.
In order to ensure the power supply reliability of each unit, the master controller, the slave controller and each I/O unit are respectively provided with at least two power supply access ends, each power supply access end is respectively connected with different direct current power supplies, and obviously, the normal operation of the system is not influenced by the single power supply fault.
Fig. 2 is a circuit diagram of the trip outlet and two I/O units, wherein four relays are connected to the DO interface of each I/O unit, and two relays are connected to the DO interface of each I/O unit (one relay is shown in the same I/O unit in fig. 2, and the other relay is not shown). For convenience of description, the three I/O units will now be named as a # 1I/O unit, a # 2I/O unit, and a # 3I/O unit in this order. Taking the circuit connection structure of the # 1I/O unit and the # 2I/O unit as an example, the N001 node and the N002 node correspond to the normally open contact of the connection relay, the C01 node and the C02 node correspond to the common end of the connection relay, and the NC01 node and the NC02 node correspond to the normally closed contact of the connection relay. The N001 node of the # 1I/O unit is connected with the N001 node of the # 2I/O unit to form a first common node; the C01 node of the # 1I/O unit is connected with the C01 node of the # 2I/O unit to form a second common node; the N002 node of the # 1I/O unit is connected with the N002 node of the # 2I/O unit to form a third common node; the C02 node of the # 1I/O unit is connected with the C02 node of the # 2I/O unit to form a fourth common node; the first public node and the third public node are respectively connected to a tripping outlet of the thermotechnical protection shutdown system, and the second public node and the fourth public node are in short circuit. During thermotechnical protection action, two relays connected to the DO interface of the # 1I/O unit and two relays connected to the DO interface of the # 2I/O unit act simultaneously, and the normal outlet of the protection action is not affected by the fault of a single I/O unit or the fault of a single relay, so that the occurrence rate of misoperation and operation rejection of the protection action is further reduced.
As shown in fig. 3, the circuit diagram of the trip outlets and the fault alarm of the phase modulation machine thermal protection shutdown system provided by the embodiment of the invention is provided, four relays of each group of trip outlets adopt a normally closed contact series connection scheme, the alarm nodes after series connection are connected into the thermal protection shutdown system, whether the relays of each group of trip outlet loops have faults is judged through software, and alarm information can be uploaded to the phase modulation machine monitoring system. The tripping outlet signal adopts a normally open signal, normally open contacts of a group of relays of each I/O unit are connected in series firstly and then connected in parallel with a group of relays of the other I/O unit, and the tripping signal output is not influenced by the fault of a single relay or the fault of a single I/O unit; the fault alarm signal adopts a normally closed signal, normally closed contacts of a group of relays of every two I/O units are connected in series and are judged by combining with the tripping outlet signal, and the relay fault in the group of tripping outlet signals can be diagnosed.
the thermotechnical protection shutdown system has an intelligent self-diagnosis function, and abnormal alarm or fault of any element can send diagnosis information to the phase modulator monitoring system. The phase modifier monitoring system is provided with an HMI station, and an independent thermal protection shutdown system HMI background is not separately arranged. A user can check the diagnosis information and the tripping action state of the thermotechnical protection shutdown system through the HMI station, and meanwhile, the phase modulation monitoring system control cabinet can receive the alarm, the fault state information and the tripping action state of the thermotechnical protection shutdown system through hard wiring. The thermotechnical protection shutdown system has an accident recall function and can record thermotechnical protection action time sequence recording and trip first-out.
the switching value input into the thermal protection shutdown system in each group of thermal protection shutdown signals is a passive dry contact signal and is taken from a terminal contact of a field switching value instrument or controlled equipment; the temperature signals of thermal resistors, such as the temperature of a bearing bush at a wire outlet end, the temperature of a bearing bush at a non-wire outlet end and the like, are taken from an on-site thermal resistor measuring element, and in a thermotechnical protection shutdown system, the thermal resistor signals are subjected to slow signal protection processing to prevent misoperation caused by resistance mutation due to loosening of a connecting wire.
The embodiment of the invention also provides a phase modifier thermal protection shutdown system control method, which can be realized by adopting the phase modifier thermal protection shutdown system, and comprises the following steps:
each I/O unit synchronously acquires a thermotechnical protection shutdown signal and synchronously uploads the thermotechnical protection shutdown signal to the master controller and the slave controller;
When the master controller is in a normal operation working state, the slave controller keeps the thermotechnical protection shutdown signal synchronous with the master controller through a redundant synchronous network, the master controller judges the protection action according to the thermotechnical protection shutdown signal, issues a shutdown protection instruction to a corresponding trip outlet of a thermotechnical protection shutdown system, and uploads the protection action judgment result to a phase modulator monitoring system;
and when the master controller is in an abnormal operation working state, the slave controller judges the protection action according to the thermotechnical protection shutdown signal uploaded by each I/O unit and uploads the judgment result to the phase modulator monitoring system.
The thermal protection shutdown signal comprises: the system comprises a vibration ultrahigh signal of a non-outlet end bearing, a vibration ultrahigh signal of a outlet end bearing, a too low stator cooling water flow signal, a too low rotor cooling water flow signal, a low pressure signal of a lubricating oil supply port, an overspeed signal of a phase modulator, a too low liquid level signal of a lubricating oil tank, an ultrahigh temperature signal of an outlet end bearing bush, an ultrahigh temperature signal of a non-outlet end bearing bush, a complete stop signal of an alternating-current lubricating oil pump and an emergency stop signal. And slow signal protection processing should be carried out on the temperature signal, so that misoperation caused by sudden change of resistance due to loosening of the wiring is prevented.
As shown in fig. 4, the logic block diagram is a logic block diagram for performing triple determination of I/O units on a low jump signal of a lubricant oil supply port by a main controller according to an embodiment of the present invention, DI interfaces of three I/O units respectively collect the low jump signal of the lubricant oil supply port pressure, and the main controller issues a corresponding protection instruction according to a two-out-of-three principle, where the two-out-of-three principle refers to: when the judgment is made according to the thermotechnical protection shutdown signals uploaded by two I/O units and the tripping protection action is required to be executed, the main controller or the slave controller controls the tripping protection action to be executed.
And the main controller and the slave controller preferentially issue a shutdown protection instruction according to a protection action priority principle, and the shutdown protection instruction is executed by a control loop of the controlled object driving device.
After the phase modulation machine thermotechnical protection shutdown system control method provided by the embodiment of the invention is adopted, the reliability of the thermotechnical protection action of the phase modulation machine set can be greatly improved, and the personal safety and the equipment safety are ensured.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A phase modifier thermal protection shutdown system is characterized by comprising a master controller, a slave controller and three I/O units;
The master controller and the slave controllers are mutually standby and are in communication connection with the phase modulator monitoring system through a redundant monitoring network; the master controller is in communication connection with the slave controllers through a redundant synchronous network;
The I/O units are mutually independent and respectively collect thermotechnical protection shutdown signals; each I/O unit is provided with four network communication interfaces, one pair of network communication interfaces is in communication connection with the master controller through a redundant I/O network, and the other pair of network communication interfaces is in communication connection with the slave controller through another redundant I/O network.
2. a phase modifier thermal protection shutdown system as claimed in claim 1, wherein the master controller, the slave controller and each I/O unit are configured with at least two power supply access terminals, each power supply access terminal being connected to a different power supply respectively.
3. A phase modulator thermal protection shutdown system according to claim 1, wherein the DO interface of each I/O unit is connected to four relays, each relay having one normally open contact and one normally closed contact; the three I/O units are grouped pairwise, each I/O unit is correspondingly connected with a pair of relays of the other I/O unit in the same group through a pair of relays, a pair of normally open contacts connected to the same I/O unit are connected in parallel with each other and then connected to a tripping outlet, and a pair of normally closed contacts are connected in series with a pair of normally closed contacts of the other I/O unit in the same group respectively to form a series node short circuit.
4. A phase modulation machine thermal protection shutdown system according to claim 1, characterized in that the phase modulation machine monitoring system is provided with an HMI station through which the phase modulation machine monitoring system checks information including a fault state, a fault diagnosis result, and a trip action state, and can acquire alarm information through the HMI station.
5. A phase modulation machine thermal protection shutdown system according to any one of claims 1 to 4, characterized in that a switching value acquisition port of each I/O unit is connected with a switching instrument of a controlled device or a terminal contact of the controlled device; and the temperature signal acquisition port of each I/O unit is connected with a temperature acquisition element of the controlled equipment.
6. a phase modifier thermal protection shutdown control method is characterized by being realized by adopting the phase modifier thermal protection shutdown system of any one of claims 1 to 5, and the method comprises the following steps:
Each I/O unit synchronously acquires a thermotechnical protection shutdown signal and synchronously uploads the thermotechnical protection shutdown signal to the master controller and the slave controller;
When the master controller is in a normal operation working state, the slave controller keeps the thermotechnical protection shutdown signal synchronous with the master controller through a redundant synchronous network, the master controller judges the protection action according to the thermotechnical protection shutdown signal, issues a shutdown protection instruction to a corresponding trip outlet of a thermotechnical protection shutdown system, and uploads the protection action judgment result to a phase modulator monitoring system; when the thermal protection acts, the DO relay of each I/O unit acts;
and when the master controller is in an abnormal operation working state, the slave controller judges the protection action according to the thermotechnical protection shutdown signal uploaded by each I/O unit and uploads the judgment result to the phase modulator monitoring system.
7. A phase modulation thermal protection shutdown control method according to claim 6, characterized in that the master controller or the slave controller controls to execute the trip protection action when it is determined that the trip protection action should be executed according to the thermal protection shutdown signal uploaded by two of the I/O units.
8. a phase modifier thermal protection shutdown control method as set forth in claim 6, wherein the thermal protection shutdown signal includes: the system comprises a vibration ultrahigh signal of a non-outlet end bearing, a vibration ultrahigh signal of a outlet end bearing, a too low stator cooling water flow signal, a too low rotor cooling water flow signal, a low pressure signal of a lubricating oil supply port, an overspeed signal of a phase modulator, a too low liquid level signal of a lubricating oil tank, an ultrahigh temperature signal of an outlet end bearing bush, an ultrahigh temperature signal of a non-outlet end bearing bush, a complete stop signal of an alternating-current lubricating oil pump and an emergency stop signal.
9. a phase modulator thermal protection shutdown control method according to claim 8, further comprising performing slow signal protection processing on a temperature signal of the thermal protection shutdown signal.
10. A phase modifier thermal protection shutdown control method as claimed in claim 6, wherein the master controller and the slave controller preferentially issue a shutdown protection instruction according to a protection action priority principle.
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| CN201910724561.9A CN110543388B (en) | 2019-08-07 | 2019-08-07 | Thermal protection shutdown system of phase modifier and shutdown control method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976980A (en) * | 2017-11-25 | 2018-05-01 | 国网辽宁省电力有限公司电力科学研究院 | Large-scale phase modifier DCS controls start ＆ shutdown through one key system and method |
| CN108234226A (en) * | 2016-12-15 | 2018-06-29 | 南京南瑞继保电气有限公司 | A kind of IO groups of redundancy network-building methods of industrial process control based on GOOSE |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108234226A (en) * | 2016-12-15 | 2018-06-29 | 南京南瑞继保电气有限公司 | A kind of IO groups of redundancy network-building methods of industrial process control based on GOOSE |
| CN107976980A (en) * | 2017-11-25 | 2018-05-01 | 国网辽宁省电力有限公司电力科学研究院 | Large-scale phase modifier DCS controls start ＆ shutdown through one key system and method |
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