CN104681367A - Automatic tripping device and method adopting optical-fiber infrared control over thermal failure of power isolating switch - Google Patents
Automatic tripping device and method adopting optical-fiber infrared control over thermal failure of power isolating switch Download PDFInfo
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000000523 sample Substances 0.000 claims abstract description 36
- 230000002159 abnormal effect Effects 0.000 claims abstract description 4
- 238000009529 body temperature measurement Methods 0.000 claims description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000013021 overheating Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005288 electromagnetic effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
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Abstract
本发明涉及一种电力隔离开关热故障的光纤红外控制自动跳闸装置及方法，包括通过高压导线电性连接的隔离开关和断路器，以及用于检测隔离开关合闸状态时触头温度的带红外测温探头的红外测温传感器、AD转换器、用于控制断路器带负荷跳闸的跳闸装置、光纤、控制电缆；所述跳闸装置包括跳闸线圈及与该跳闸线圈通过控制电缆连接的控制模块。本发明通过带红外测温探头的红外测温传感器实时检测隔离开关合闸状态时触头温度，并将该温度数据与控制模块内设置的阈值温度比较，判断隔离开关触头温度是否异常，控制断路器的开断，从而达到间接控制隔离开关的开断，有效的防止了电力事故的发生。
The invention relates to an optical fiber infrared control automatic tripping device and method for thermal failure of a power isolating switch. An infrared temperature sensor of a temperature measuring probe, an AD converter, a tripping device for controlling the load tripping of a circuit breaker, an optical fiber, and a control cable; the tripping device includes a tripping coil and a control module connected to the tripping coil through a control cable. The present invention detects in real time the contact temperature of the isolating switch when it is in the closing state by means of an infrared temperature measuring sensor with an infrared temperature measuring probe, and compares the temperature data with the threshold temperature set in the control module to determine whether the contact temperature of the isolating switch is abnormal, and to control The opening and closing of the circuit breaker can achieve indirect control of the opening and closing of the isolating switch, effectively preventing the occurrence of electric accidents.
Description
技术领域 technical field
本发明涉及一种电力隔离开关热故障的光纤红外控制自动跳闸装置及方法。 The invention relates to an optical fiber infrared control automatic tripping device and method for thermal failure of a power isolating switch.
背景技术 Background technique
电力高压隔离开关在运行中由于电磁作用，会产生热量，当其触头接触不好，或隔离开关过载等故障时，电力高压隔离开关的触头都会异常发热，当温度超过一定范围时，如果不采取将与隔离开关相连接的断路器跳闸切断电源的措施，将导致由于过热引起隔离开关烧毁，甚至导致扩大电网事故的危险。现在广泛使用的传统电力高压隔离开关检测接触不良的方法，一是在停电时由试验人员做直流电阻试验，检查出是否有接触不良的隔离开关，进行事先处理，再投运；二是在运行中由工作人员携带红外测温设备，通过对每台运行中电力高压隔离开关的测温，如发现有温度异常升高的，再通知其他有关运行人员采取断开相应的断路器进行停电检修的措施。传统电力高压隔离开关的接触不良发热或过载发热，均无法实现实时连续的在线检测和自动跳闸，且受操作人员人为操作因素的影响，特别对电力高压隔离开关的突发性过热故障，可能导致电力高压隔离开关由于过热而损坏，甚至危及电网安全的严重事故。 The electric high-voltage isolating switch will generate heat due to the electromagnetic effect during operation. When the contacts are not in good contact or the isolating switch is overloaded and other faults, the contacts of the electric high-voltage isolating switch will be abnormally heated. When the temperature exceeds a certain range, if Failure to take measures to trip the circuit breaker connected to the isolating switch to cut off the power supply will cause the isolating switch to burn out due to overheating, and even cause the danger of expanding the power grid accident. The method of detecting poor contact of traditional high-voltage isolating switches that is widely used now is to conduct a DC resistance test by the tester during a power outage to check whether there is a disconnecting switch with poor contact, perform prior treatment, and then put it into operation; In the process, the staff carry infrared temperature measurement equipment, and measure the temperature of each high-voltage isolation switch in operation. If an abnormal temperature rise is found, other relevant operating personnel will be notified to disconnect the corresponding circuit breaker for power outage maintenance. measure. Poor contact heating or overload heating of the traditional high-voltage isolating switch cannot realize real-time continuous online detection and automatic tripping, and is affected by human factors of the operator, especially for sudden overheating failures of the high-voltage isolating switch, which may cause The power high-voltage isolating switch is damaged due to overheating, and even a serious accident that endangers the safety of the power grid.
发明内容 Contents of the invention
本发明的目的在于解决上述问题，提供一种电力隔离开关热故障的光纤红外控制自动跳闸装置及方法。 The purpose of the present invention is to solve the above problems and provide an optical fiber infrared control automatic tripping device and method for thermal failure of a power isolating switch.
为实现上述目的，本发明的技术方案是：一种电力隔离开关热故障的光纤红外控制自动跳闸装置，包括通过高压导线电性连接的隔离开关和断路器，以及用于检测隔离开关合闸状态时触头温度的带红外测温探头的红外测温传感器、AD转换器、用于控制断路器带负荷跳闸的跳闸装置、光纤、控制电缆；所述跳闸装置包括跳闸线圈及与该跳闸线圈通过控制电缆连接的控制模块；所述带红外测温探头的红外测温传感器的红外测温探头通过发射和接收红外线对运行中电力高压隔离开关合闸后的触头进行非接触在线连续测温，并将温度信号通过光纤传输给AD转换器，AD转换器将带红外测温探头的红外测温传感器传输来的温度电信号转换成数字信号，再通过另一光纤传输至控制模块，控制模块根据预先设置的动作温度值，对传输来的温度数据进行分析判断，当温度值超过设置值时，控制模块对断路器跳闸线圈发出指令，跳闸线圈接收到指令后动作，使断路器进行带负荷跳闸。 In order to achieve the above object, the technical solution of the present invention is: an optical fiber infrared control automatic tripping device for thermal failure of a power isolating switch, including an isolating switch and a circuit breaker electrically connected by a high-voltage wire, and used to detect the closing state of the isolating switch An infrared temperature sensor with an infrared temperature probe for constant contact temperature, an AD converter, a trip device for controlling the load trip of a circuit breaker, an optical fiber, and a control cable; the trip device includes a trip coil and passes through the trip coil. The control module connected by the control cable; the infrared temperature measuring probe of the infrared temperature measuring sensor with the infrared temperature measuring probe conducts non-contact online continuous temperature measurement on the contacts after the power high voltage isolating switch is closed during operation by emitting and receiving infrared rays, And the temperature signal is transmitted to the AD converter through the optical fiber. The AD converter converts the temperature electrical signal transmitted by the infrared temperature sensor with the infrared temperature measurement probe into a digital signal, and then transmits it to the control module through another optical fiber. The control module according to The preset action temperature value is used to analyze and judge the transmitted temperature data. When the temperature value exceeds the set value, the control module sends an instruction to the trip coil of the circuit breaker, and the trip coil operates after receiving the instruction to make the circuit breaker perform on-load tripping. .
在本发明实施例中，所述控制模块还连接有一用于对隔离开关温度异常状态进行报警的报警器。 In the embodiment of the present invention, the control module is further connected with an alarm device for alarming the abnormal temperature state of the isolating switch.
在本发明实施例中，所述断路器包括充油开关、真空开关和充SF6气体开关。 In the embodiment of the present invention, the circuit breaker includes an oil-filled switch, a vacuum switch and a SF 6 gas-filled switch.
在本发明实施例中，所述带有红外测温探头的红外测温传感器的红外测温探头外部包有绝缘套，并安装在用于固定所述隔离开关的隔离开关钢结构上，且正对隔离开关合闸状态时的触头。 In the embodiment of the present invention, the infrared temperature measuring probe of the infrared temperature measuring sensor with an infrared temperature measuring probe is covered with an insulating sleeve, and is installed on the isolating switch steel structure used to fix the isolating switch, and is The contact when the isolating switch is closed.
在本发明实施例中，所述控制模块为PLC控制器。 In the embodiment of the present invention, the control module is a PLC controller.
本发明还提供了一种采用如上述所述的电力隔离开关热故障的光纤红外控制自动跳闸装置的自动跳闸控制方法，包括如下步骤， The present invention also provides an automatic trip control method using the optical fiber infrared control automatic trip device for thermal failure of the power isolating switch as described above, including the following steps,
1）将带有红外测温探头的红外测温传感器的红外测温探头安装在电力高压隔离开关处合闸状态触头的附近，并正对隔离开关合闸状态时触头位置，其安装距离应满足电力高压隔离开关运行高压电等级的安全距离； 1) Install the infrared temperature probe of the infrared temperature sensor with an infrared temperature probe near the contact in the closing state of the power high-voltage isolating switch, and face the position of the contact when the isolating switch is in the closing state, and its installation distance It should meet the safety distance of the high-voltage electric level of the electric high-voltage isolating switch;
2）电力高压隔离开关运行时，由红外测温探头对隔离开关合闸状态时触头发射红外射线，进行在线非接触实时在线测温； 2) When the power high-voltage isolating switch is running, the infrared temperature measuring probe emits infrared rays from the contact when the isolating switch is in the closed state, and performs online non-contact real-time online temperature measurement;
3）带有红外测温探头的红外测温传感器将实时的测温电信号数据传送至AD转换器； 3) The infrared temperature sensor with an infrared temperature probe transmits the real-time temperature measurement electrical signal data to the AD converter;
4）AD转换器将由带有红外测温探头的红外测温传感器传送来的测温电信号转换为数字信号并放大，再通过光纤传送给控制模块； 4) The AD converter converts the temperature measurement electrical signal transmitted by the infrared temperature measurement sensor with an infrared temperature measurement probe into a digital signal and amplifies it, and then transmits it to the control module through an optical fiber;
5）控制模块由AD信号转换器传送来的实时温度数字信号，根据预先设计编程的温度设置值进行分析计算，同时将实时温度值通过网络传输至网上服务器中，描绘成温度-时间曲线存储至服务器数据库中； 5) The control module analyzes and calculates the real-time temperature digital signal transmitted by the AD signal converter according to the pre-designed and programmed temperature setting value, and at the same time transmits the real-time temperature value to the online server through the network, and stores it as a temperature-time curve. in the server database;
6）当隔离开关触头温度异常升高至设置值时，控制模块通过控制电缆对断路器的跳闸线圈发出指令，跳闸线圈接收到指令后动作，使断路器进行带负荷跳闸，以断开电力隔离开关电源。 6) When the contact temperature of the isolating switch rises abnormally to the set value, the control module sends an instruction to the trip coil of the circuit breaker through the control cable, and the trip coil acts after receiving the instruction to make the circuit breaker trip on load to disconnect the power Isolated switching power supply.
相较于现有技术，本发明具有以下有益效果： Compared with the prior art, the present invention has the following beneficial effects:
本发明通过光纤红外在线非接触测温、传感和自动控制技术，以及PLC微处理器的运用，当运行中电力高压隔离开关触头过热至温度超过设置值时，能及时自动控制断路器带负荷跳闸，切断电源，本发明装置还可以对变电站所有高压隔离开关采取集群在线自动控制方式，有力保障运行中电力高压隔离开关和电网的安全运行，与传统由工作人员携带红外测温设备，对每台运行中电力高压隔离开关进行测温，当发现其中有过热故障的隔离开关时，再通知运行人员对相应负荷开关进行分闸操作的情况相比，有着巨大优势。 The invention uses optical fiber infrared online non-contact temperature measurement, sensing and automatic control technology, and the application of PLC microprocessor. The load trips and cuts off the power supply. The device of the present invention can also adopt a cluster online automatic control method for all high-voltage isolating switches in the substation, which can effectively guarantee the safe operation of the high-voltage isolating switches and the power grid during operation. It has a huge advantage to measure the temperature of each high-voltage isolating switch in operation. When an isolating switch with an overheating fault is found, the operating personnel are notified to open the corresponding load switch.
附图说明 Description of drawings
图1是本发明实施例的电力隔离开关热故障的光纤红外控制自动跳闸装置在隔离开关触头温度正常，断路器处运行合闸状态时的工作示意图。 Figure 1 is a schematic diagram of the operation of the optical fiber infrared control automatic tripping device for thermal failure of the power isolating switch according to the embodiment of the present invention when the contact temperature of the isolating switch is normal and the circuit breaker is in the closed state.
图2是本发明实施例的隔离开关处运行合闸状态的俯视图。 Fig. 2 is a top view of the operating closing state of the isolating switch according to the embodiment of the present invention.
图3是本发明实施例的当隔离开关触头温度异常升高至设置值时，控制模块通过跳闸装置自动控制断路器动、静触头跳闸分离，切断电源的工作示意图。 Fig. 3 is a working schematic diagram of the embodiment of the present invention, when the contact temperature of the isolating switch abnormally rises to the set value, the control module automatically controls the tripping and separation of the dynamic and static contacts of the circuit breaker through the tripping device, and cuts off the power supply.
图4是本发明实施例的电力隔离开关热故障的光纤红外控制自动跳闸装置在隔离开关处分闸状态时，停止工作示意图。 Fig. 4 is a schematic diagram of the optical fiber infrared control automatic tripping device of the embodiment of the present invention when the thermal failure of the power isolating switch is in the open state at the isolating switch, and stops working.
图5是本发明实施例的隔离开关处分闸状态的俯视图。 Fig. 5 is a top view of the disconnecting state of the isolating switch according to the embodiment of the present invention.
图6是本发明实施例的电力隔离开关热故障的光纤红外控制自动跳闸装置集群控制工作原理方框示意图。 Fig. 6 is a schematic block diagram of the working principle of the cluster control of the optical fiber infrared control automatic tripping device for thermal failure of the power isolating switch according to the embodiment of the present invention.
图中标号说明：0-断路器；01-高压导线；02-隔离开关钢架构；03-绝缘瓷套；04-刀闸；1-带有红外测温探头的红外测温传感器；2-红外测温探头；3-红外射线；4-隔离开关触头；5-光纤；6-AD转换器；7-控制模块；8-控制电缆；9-跳闸线圈；10-红外探头绝缘套；11-断路器静触头；12-断路器动触头。 Explanation of symbols in the figure: 0-circuit breaker; 01-high voltage wire; 02-disconnector steel frame; 03-insulating porcelain sleeve; 04-knife switch; 1-infrared temperature sensor with infrared temperature probe; Temperature probe; 3-infrared rays; 4-isolation switch contact; 5-optical fiber; 6-AD converter; 7-control module; 8-control cable; 9-tripping coil; Static contact of circuit breaker; 12-moving contact of circuit breaker.
具体实施方式 Detailed ways
下面结合附图，对本发明的技术方案进行具体说明。 The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.
请参见图1-图6，本发明的电力隔离开关热故障的光纤红外控制自动跳闸装置，由断路器0、跳闸装置、隔离开关、带有红外测温探头的红外测温传感器1、传输信号数据的光纤5、AD转换器6、控制电缆8等组成。断路器0与隔离开关通过高压导线01电性连接，断路器0可以是充油开关、真空开关、充SF6气体开关等断路器；跳闸装置包括断路器跳闸线圈9和控制模块7，在当隔离开关发生过热故障时，跳闸线圈9能根据控制模块7的指令动作，使断路器0带负荷跳闸，断开电力隔离开关电源，保护隔离开关和电网的安全运行。 Please refer to Fig. 1-Fig. 6, the optical fiber infrared control automatic tripping device of thermal failure of power isolating switch of the present invention, by circuit breaker 0, tripping device, isolating switch, infrared temperature measuring sensor 1 with infrared temperature measuring probe, transmission signal Data optical fiber 5, AD converter 6, control cable 8 and other components. The circuit breaker 0 is electrically connected to the isolating switch through a high-voltage wire 01, and the circuit breaker 0 can be a circuit breaker such as an oil-filled switch, a vacuum switch, or a SF 6 gas-filled switch; the tripping device includes a circuit breaker tripping coil 9 and a control module 7. When an overheating fault occurs in the isolating switch, the tripping coil 9 can act according to the instruction of the control module 7 to trip the circuit breaker 0 under load, cut off the power supply of the power isolating switch, and protect the safe operation of the isolating switch and the power grid.
本实施例中，带有红外测温探头的红外测温传感器1的红外测温探头2外部包有红外探头绝缘套10，并安装在用于固定所述隔离开关的隔离开关钢结构02上，且正对隔离开关合闸状态时的隔离开关触头4。 In this embodiment, the infrared temperature measuring probe 2 of the infrared temperature measuring sensor 1 with an infrared temperature measuring probe is covered with an infrared probe insulating sleeve 10, and is installed on the isolating switch steel structure 02 for fixing the isolating switch, And facing the isolating switch contact 4 when the isolating switch is in the closing state.
电力高压隔离开关在运行中由于电磁作用，会产生热量，当其触头接触不好，或隔离开关通过电流超过其设置值等故障时，电力高压隔离开关的触头都会异常发热，当温度超过一定范围时，如果不采取断开电源措施，将导致由于过热引起隔离开关烧毁，甚至导致扩大电网事故的危险，但电力隔离开关在运行中自身不能带负荷切断电源，只能在与其连接的断路器带负荷切断电源后，再进行断开，隔离开关如带负荷断开电源，轻则导致刀闸触头烧毁，重则会造成危及电网安全的严重事故，因此在发生隔离刀闸事故时，首先应使断路器跳闸，切断隔离开关电源，以保护隔离开关。本发明通过光纤传输、非接触红外测温技术以及PLC微机处理器的运用，当运行中电力高压隔离开关触头过热至温度超过设置值时，自动控制断路器带负荷跳闸，切断电源，有力保障运行中电力高压隔离开关和电网的安全运行，具体工作原理如下：带红外测温探头的红外测温传感器1的红外测温探头2通过发射和接收红外射线3对运行中电力高压隔离开关合闸后的触头4进行非接触在线连续测温，并将温度信号通过光纤5传输给AD转换器6，AD转换器6将带红外测温探头的红外测温传感器1传输来的温度电信号转换成数字信号，再通过另一光纤5传输至控制模块7，控制模块7根据预先设置的动作温度值，对传输来的温度数据进行分析判断，当温度值超过设置值时，控制模块7对断路器跳闸线圈9发出指令，跳闸线圈9接收到指令后动作，使断路器0进行带负荷跳闸。 The electric high-voltage isolating switch will generate heat due to the electromagnetic effect during operation. When the contacts of the isolating switch are not in good contact, or the current of the isolating switch exceeds its set value, etc., the contacts of the electric high-voltage isolating switch will be abnormally heated. When the temperature exceeds In a certain range, if measures to disconnect the power supply are not taken, it will cause the isolating switch to be burned due to overheating, and even cause the danger of expanding the power grid accident. If the isolating switch disconnects the power supply with load, it will cause the contact of the knife switch to burn out, and it will cause a serious accident that endangers the safety of the power grid. Therefore, in the event of an isolation switch accident, First of all, the circuit breaker should be tripped to cut off the power supply of the isolating switch to protect the isolating switch. Through optical fiber transmission, non-contact infrared temperature measurement technology and the application of PLC microcomputer processor, the present invention automatically controls the circuit breaker to trip with load and cut off the power supply when the contact of the high-voltage isolation switch is overheated to the temperature exceeding the set value during operation, which effectively guarantees The safe operation of the power high-voltage isolating switch and the power grid in operation, the specific working principle is as follows: the infrared temperature sensor 1 with the infrared temperature measuring probe 2 closes the running power high-voltage isolating switch by emitting and receiving infrared rays 3 The last contact 4 performs non-contact online continuous temperature measurement, and transmits the temperature signal to the AD converter 6 through the optical fiber 5, and the AD converter 6 converts the temperature electrical signal transmitted by the infrared temperature sensor 1 with an infrared temperature measurement probe. into a digital signal, and then transmitted to the control module 7 through another optical fiber 5. The control module 7 analyzes and judges the transmitted temperature data according to the preset action temperature value. When the temperature value exceeds the set value, the control module 7 will open the circuit. The trip coil 9 of the circuit breaker sends out an instruction, and the trip coil 9 acts after receiving the instruction, so that the circuit breaker 0 performs on-load tripping.
本发明还提供了一种采用如上述所述的电力隔离开关热故障的光纤红外控制自动跳闸装置的自动跳闸控制方法，包括如下步骤， The present invention also provides an automatic trip control method using the optical fiber infrared control automatic trip device for thermal failure of the power isolating switch as described above, including the following steps,
1）将带有红外测温探头的红外测温传感器1的红外测温探头2安装在电力高压隔离开关处合闸状态触头4的附近，并正对隔离开关合闸状态时触头4位置，其安装距离应满足电力高压隔离开关运行高压电等级的安全距离； 1) Install the infrared temperature sensor 1 and the infrared temperature probe 2 with the infrared temperature probe near the contact 4 in the closing state of the electric high-voltage isolating switch, and face the position of the contact 4 in the closing state of the isolating switch , the installation distance should meet the safety distance of the high-voltage electric level of the electric high-voltage isolating switch;
2）电力高压隔离开关运行时，由红外测温探头2对隔离开关合闸状态时触头4发射红外射线3，进行在线非接触实时在线测温； 2) When the power high-voltage isolating switch is running, the infrared temperature measuring probe 2 emits infrared rays 3 to the contact 4 when the isolating switch is in the closed state, and performs online non-contact real-time online temperature measurement;
3）带有红外测温探头的红外测温传感器1将实时的测温电信号数据传送至AD转换器； 3) The infrared temperature sensor 1 with an infrared temperature probe transmits the real-time temperature measurement electrical signal data to the AD converter;
4）AD转换器6将由带有红外测温探头的红外测温传感器1传送来的测温电信号转换为数字信号并放大，再通过光纤5传送给控制模块7； 4) The AD converter 6 converts the temperature measurement electric signal transmitted by the infrared temperature measurement sensor 1 with an infrared temperature measurement probe into a digital signal and amplifies it, and then transmits it to the control module 7 through the optical fiber 5;
5）控制模块7由AD信号转换器传送来的实时温度数字信号，根据预先设计编程的温度设置值进行分析计算，同时将实时温度值通过网络传输至网上服务器中，描绘成温度-时间曲线存储至服务器数据库中； 5) The control module 7 analyzes and calculates the real-time temperature digital signal transmitted by the AD signal converter according to the pre-designed and programmed temperature setting value, and at the same time transmits the real-time temperature value to the online server through the network, and stores it as a temperature-time curve to the server database;
6）当隔离开关触头4温度异常升高至设置值时，控制模块7通过控制电缆8对断路器0的跳闸线圈9发出指令，跳闸线圈9接收到指令后动作，使断路器0进行带负荷跳闸，以断开电力隔离开关电源。 6) When the temperature of the isolating switch contact 4 rises abnormally to the set value, the control module 7 sends an instruction to the trip coil 9 of the circuit breaker 0 through the control cable 8, and the trip coil 9 operates after receiving the instruction, so that the circuit breaker 0 is operated with Load tripping to disconnect the power isolating switching power supply.
以上是本发明的较佳实施例，凡依本发明技术方案所作的改变，所产生的功能作用未超出本发明技术方案的范围时，均属于本发明的保护范围。 The above are the preferred embodiments of the present invention, and all changes made according to the technical solution of the present invention, when the functional effect produced does not exceed the scope of the technical solution of the present invention, all belong to the protection scope of the present invention.
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