CN115639441A - Method for detecting insulation fault of power distribution circuit of fire emergency lighting and evacuation indicating system - Google Patents
Method for detecting insulation fault of power distribution circuit of fire emergency lighting and evacuation indicating system Download PDFInfo
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Abstract
The invention discloses a method for detecting insulation faults of a power distribution circuit of a fire emergency lighting and evacuation indicating system, which comprises the following steps: an emergency lighting controller of the fire-fighting emergency lighting and evacuation indicating system automatically sends an insulation fault detection signal to a subordinate emergency lighting centralized power supply; after receiving the insulation fault detection signal, the emergency lighting centralized power supply executes an insulation fault detection process; the insulation detection module transmits the insulation fault type and the insulation fault occurrence position to a fire-fighting emergency lighting and evacuation indicating system, and the fire-fighting emergency lighting and evacuation indicating system automatically resets the main and standby electric switches of the emergency lighting centralized power supply and the good insulation topological structure to inform operation and maintenance personnel of overhauling. The invention adopts the insulation detection module to carry out separation and combination control on the nodes of each trunk line and each branch line of the power distribution circuit so as to change the topology of the circuit, automatically judges and positions the insulation fault based on analyzing the detection value of the insulation resistance of different circuit topologies and the characteristics of the insulation fault, quickly processes the insulation fault and restores the normal working state of each part of the system.
Description
Technical Field
The invention belongs to the technology of system fault detection and system fault positioning, and particularly relates to a method for detecting insulation faults of a power distribution circuit of a fire emergency lighting and evacuation indication system.
Background
The fire-fighting emergency lighting and evacuation indication system is a system for providing lighting and evacuation indication for the places where personnel still need to work during evacuation and fire disaster, and the safe and reliable operation of the system is the guarantee of the safe operation of the specific places under the fire-fighting emergency condition. When the fire emergency lighting and evacuation indicating system power distribution circuit has an insulation fault, if the fault position can be quickly determined, the method has important significance for treating potential huge fault hidden dangers.
At present, an insulation fault of a power distribution circuit of a fire emergency lighting and evacuation indication system is lack of an automatic detection means, the timeliness of fault finding is poor, only manual fault detection and fault location positioning can be relied on, and the problems of long time consumption, low efficiency and high dependence on operation and maintenance personnel processing experience exist. When the system has insulation faults, if the insulation faults can not be found and processed in time, the components can be damaged after the faults operate for a period of time, and an insulation fault loop is disconnected for supplying power, so that the system can not work normally when a building is in a fire or in other emergency situations, accidents can occur, and personal safety can be damaged, and therefore the insulation faults need to be found and processed quickly in time when the system operates safely and stably for a long time.
Disclosure of Invention
The invention aims to provide a fire-fighting emergency lighting and evacuation indication system power distribution loop insulation fault detection method capable of quickly determining a fault position.
The purpose of the invention is realized by the following technical scheme: a fire emergency lighting and evacuation indication system power distribution circuit insulation fault detection method is characterized by comprising the following steps:
s1, an emergency lighting controller of a fire-fighting emergency lighting and evacuation indicating system automatically sends an insulation fault detection signal to an emergency lighting centralized power supply under the jurisdiction;
s2, after the emergency lighting centralized power supply receives the insulation fault detection signal, executing the following insulation fault detection process:
the emergency lighting centralized power supply cuts off a main power supply and a standby power supply;
the power distribution loop topology network of the emergency lighting centralized power supply is read by the insulation detection module arranged in the emergency lighting centralized power supply, and the following detection flow of the insulation resistance of the power distribution loop with load is executed: the insulation detection module tests the single-loop ground insulation resistance according to the sequence of the loop 1 to the loop N, namely, 500V test voltage is input, at least 3 insulation resistance values are recorded respectively, then the average value Rxd of the insulation resistance values measured at each time is calculated, and whether the insulation fault occurs in the power distribution loop is judged:
if the average value Rxd is larger than or equal to the reference value of 50M omega, the insulation detection module marks the classified power distribution loop as an insulation good loop, and uploads the power supply number and the loop number information to an emergency lighting controller of a fire-fighting emergency lighting and evacuation indication system;
if the average value Rxd is smaller than the reference value 50M omega, the insulation detection module marks the classified power distribution loops as insulation fault loops, and the step three is carried out;
and the insulation detection module executes the following no-load power distribution loop wire insulation resistance detection process on the insulation fault loop: the insulation detection module tests the insulation fault loop no-load conductor to ground insulation resistance, namely, 500V test voltage is input, at least 3 insulation resistance values are respectively recorded, then the average value Rxk of the insulation resistance values measured at each time is calculated, and the insulation fault type of the power distribution loop is comprehensively judged by combining the average value Rxk, the reference value 50M omega and the average value Rxd;
insulating detection module carries out fault location flow to lamps and lanterns insulation fault, wire and the mixed insulation fault of lamps and lanterns, wire insulation fault respectively according to judging the insulating fault type of distribution circuit: changing the network topology structure of the emergency lighting centralized power supply according to the control logic set by the dichotomy discarding algorithm corresponding to the fault, and judging the specific position of the insulation fault;
and S3, the insulation detection module uploads the insulation fault type and the insulation fault occurrence position information to a fire-fighting emergency lighting and evacuation indication system, and the fire-fighting emergency lighting and evacuation indication system automatically resets the main and standby power switches of the emergency lighting centralized power supply and the well-insulated topological structure to inform operation and maintenance personnel of overhauling.
The invention adopts the mode that the insulation detection module automatically controls the connection and disconnection of each trunk line node and each branch line node of the power distribution circuit to change the circuit topology, realizes the automatic judgment and automatic positioning of the insulation fault based on the characteristics of analyzing the insulation resistance detection values of different circuit topologies and the insulation fault, can quickly process the insulation fault and recover the normal working state of each part of the system, solves the problem that the traditional insulation fault judgment and insulation fault positioning excessively depend on manpower, and has important significance.
The insulation fault types of the invention refer to lamp insulation faults, mixed insulation faults of wires and lamps and wire insulation faults, wherein the wire insulation faults comprise anode insulation faults and cathode insulation faults.
The method for comprehensively judging the type of the insulation fault of the power distribution loop comprises the following steps:
when the average value Rxk of the insulation resistances is smaller than the reference value 50M omega, the insulation detection module calculates the variation rate P = (Rxd-Rxk)/Rxd x 100% of the insulation resistance value of the power distribution circuit in the load and no-load states;
when P is less than 10%, the insulation detection module judges that the insulation fault type of the power distribution circuit is a wire insulation fault;
when the P is more than or equal to 10%, the insulation detection module judges that the insulation fault type of the power distribution circuit is a mixed insulation fault of a lead and a lamp;
when the average value Rxk of the insulation resistances is larger than or equal to the reference value 50M omega, the insulation detection module judges that the type of the insulation fault of the distribution circuit is a lamp insulation fault.
In the test of the insulation resistance detection process of the distribution loop with the load, the single loop respectively carries out 3-5 times of testing the insulation resistance of the positive electrode and the negative electrode to the ground, and each time of testing lasts for 15-30 seconds.
In the test of the no-load distribution loop wire insulation resistance detection process, the single loop respectively carries out 3-5 times of positive and negative electrode ground insulation resistance tests, and each test lasts for 15-30 seconds.
Compared with the prior art, the invention has the following remarkable effects:
the invention adopts the mode that the insulation detection module automatically controls the connection and disconnection of each trunk line node and each branch line node of the power distribution circuit to change the circuit topology, realizes the automatic judgment and automatic positioning of the insulation fault based on the characteristics of analyzing the insulation resistance detection values of different circuit topologies and the insulation fault, can quickly process the insulation fault and recover the normal working state of each part of the system, and has important significance for solving the problem that the traditional insulation fault judgment and insulation fault positioning excessively depend on manual work.
Drawings
The invention is described in further detail below with reference to the figures and the specific embodiments.
FIG. 1 is a block flow diagram of the present invention;
fig. 2 is a schematic diagram of the lamp insulation failure of the present invention (the broken line frame is the failed lamp).
Detailed Description
As shown in fig. 1, the method for detecting insulation fault of power distribution loop of fire emergency lighting and evacuation indication system of the present invention comprises the following steps:
s1, an insulation daily inspection program in an emergency lighting controller automatically sends an insulation fault detection signal to an emergency lighting centralized power supply administered downwards by a fire-fighting emergency lighting and evacuation indicating system, and the daily inspection time can be set as required;
the fire emergency lighting and evacuation indicating system is a centralized control system of a centralized power supply and consists of an emergency lighting controller, an emergency lighting centralized power supply, a power distribution loop wire and an emergency lighting lamp. The emergency lighting centralized power supply is provided with an intelligent circuit breaker and an insulation detection module which are configured with a remote program-controlled main and standby power supply, the emergency lighting lamp is provided with an intelligent lamp driver and an intelligent circuit breaker, and the insulation detection module and the intelligent lamp driver upload information acquired in real time to a background of a fire emergency lighting and evacuation indication system through messages.
The insulation detection module comprises a logic control submodule, an execution submodule, a storage submodule and a communication submodule, and each module has an insulation detection logic judgment and control function, an insulation detection flow execution function, an insulation resistance and topological structure storage function and an emergency lighting controller communication function.
The remote program control main and standby power supply intelligent circuit breaker is switched on and off in a remote control mode through an emergency lighting controller program background, the insulation detection module uploads collected loop information to an emergency lighting controller system, the collected loop information comprises the intelligent lamp driver node module power distribution trunk line output contact on-off state and communication state, power distribution branch line output contact on-off state and communication state information, network topology of each centralized power supply power distribution network topology structure in the system is updated regularly, and the topology of the circuit breaker is read by receiving messages of the emergency lighting controller system.
S2, after the emergency lighting centralized power supply receives the insulation fault detection signal, executing the following insulation fault detection process:
the emergency lighting centralized power supply cuts off a main power supply and a standby power supply;
secondly, an insulation detection module arranged in the emergency lighting centralized power supply reads a distribution circuit topology network of the emergency lighting centralized power supply, and executes the following loaded distribution circuit insulation resistance detection flow (the loaded distribution circuit insulation resistance detection flow is the ground insulation detection flow under the condition that the topology of the distribution circuit network to be detected at the moment is not changed): the insulation detection module tests the single-loop ground insulation resistance according to the sequence of the loop 1 to the loop N, namely, 500V test voltage is input, 3-5 times of test is respectively recorded (the single loop respectively carries out 3-5 times of anode and cathode ground insulation resistance tests), the insulation resistance value lasting for 15-30 seconds is tested, the average value Rxd of the insulation resistance values tested each time is calculated, and whether the power distribution loop has insulation fault or not is judged:
if the average value Rxd is larger than or equal to the reference value of 50M omega, the insulation detection module marks the classified power distribution loop as a well-insulated loop, and uploads the power supply number and the loop number information to an emergency lighting controller of a fire-fighting emergency lighting and evacuation indication system;
if the average value Rxd is smaller than the reference value 50M omega, the insulation detection module marks the classified power distribution loops as insulation fault loops, and the step three is carried out;
and after the insulation resistance detection module executes the insulation resistance detection process of the distribution loop with the load, all the detected distribution loops are classified, marked and locally stored, the first type is a positive pole or negative pole insulation fault loop, and a fault type judgment subprogram is executed. And the second type is a loop with good insulation of the positive electrode and the negative electrode, the insulation information is uploaded to an emergency lighting controller system database for storage and interface display, and the uploaded insulation information comprises the emergency lighting centralized power supply serial number and the insulation good power distribution positive electrode and negative electrode loop serial number.
Thirdly, the following no-load power distribution loop lead insulation resistance detection process is executed on the insulation fault loop: the insulation detection module is used for testing the no-load conductor of the insulation fault loop and the insulation resistance to the ground, and the insulation detection module sends a control signal to disconnect the distribution branch line of the distribution loop to output a normally closed contact, namely the insulation detection module inputs 500V test voltage and respectively records the test voltage for 3-5 times (the single loop respectively carries out three times of anode and cathode insulation resistance tests to the ground), the test lasts for 15-30 seconds of insulation resistance value, the average value Rxk of the insulation resistance value measured each time is calculated, and the insulation fault type of the distribution loop is comprehensively judged by combining the average value Rxk, the reference value 50M omega and the average value Rxd, and the method specifically comprises the following steps of:
when the average value Rxk is smaller than the reference value 50M omega, the insulation detection module calculates the insulation resistance value variation rate P = (Rxd-Rxk)/Rxd x 100% in the load and no-load states of the power distribution circuit:
when P is less than 10%, the insulation detection module judges that the insulation fault type of the power distribution circuit is a wire insulation fault;
when the P is more than or equal to 10%, the insulation detection module judges that the insulation fault type of the power distribution circuit is a mixed insulation fault of a lead and a lamp;
and when the average value Rxk is greater than or equal to the reference value 50M omega, the insulation detection module judges that the type of the insulation fault of the distribution circuit is the lamp insulation fault.
The insulating detection module of fourth carries out the fault location flow to lamps and lanterns insulation fault, wire and lamps and lanterns mixed insulation fault, wire insulation fault respectively according to judging the insulating fault type of distribution circuit: changing the network topology structure of the emergency lighting centralized power supply according to the control logic set by the dichotomy discarding algorithm corresponding to the fault, and judging the specific position of the insulation fault;
and S3, the insulation detection module uploads the insulation fault type and the insulation fault occurrence position information to a fire-fighting emergency lighting and evacuation indication system, and the fire-fighting emergency lighting and evacuation indication system automatically resets the main and standby power switches of the emergency lighting centralized power supply and the well-insulated topological structure to inform operation and maintenance personnel of overhauling.
The working flow of the system for realizing the detection method of the invention is specifically explained as follows:
the fire-fighting emergency lighting and evacuation indicating system realizes the functions of monitoring the operation information of the power distribution circuit, automatically updating the topological structure and daily checking the insulation resistance. The information monitored by the fire emergency lighting and evacuation indicating system comprises the number information of an emergency lighting centralized power supply in the system, the position information of primary equipment of a main and standby power supply circuit breaker of the centralized power supply, the electric quantities such as current (I), voltage (U), power (P) and the like, the remote communication quantities such as the information of a centralized power supply sub-topology structure and the like, and the monitored information is stored in a database. When a background clock of the system reaches set time, the system starts an insulation detection program, the insulation detection interval time is 24h, the system automatically reads the topological structure of the current power distribution loop, all the centralized power supplies in the system are linked to disconnect the main and standby electric breakers, an insulation detection module carries out detection, insulation information is collected after insulation detection of all the centralized power supply power distribution loops of the system is finished, a daily insulation detection brief report of the system is generated, and the daily insulation detection brief report is pushed to operation and maintenance personnel.
The emergency lighting centralized power supply realizes the functions of automatic identification and updating of a local power distribution loop topological structure, execution strategy generation of an insulation detection algorithm, insulation fault judgment and positioning. The insulation detection module configured for the emergency lighting centralized power supply can monitor the running state information of each power distribution loop of the local machine in real time, can generate different detection strategies according to the topological structure difference of each power distribution loop before insulation detection, automatically controls and detects the topological structure of each power distribution loop according to the strategies, automatically analyzes and detects data, integrates the insulation detection information of all the power distribution loops of the local machine, generates a daily insulation detection brief report of the local machine, and automatically uploads the daily insulation detection brief report to a system background after the insulation detection process of the local machine is finished. The information monitored by the insulation detection module comprises the quantity of emergency lighting lamps of each power distribution circuit, the communication state of an intelligent lamp driver, the normally closed outlet position information output by a power distribution trunk line and a power distribution branch line, and electric quantities such as current (I), voltage (U), power (P) and the like; the insulation detection data comprise average resistance values after three-five tests last 15-30 s when the anode and the cathode of each on-load power distribution loop input 500V test voltage, and sub-loop resistance average values generated by the detection strategy.
The insulation detection module intelligently analyzes the insulation state of each power distribution loop according to the insulation detection resistance characteristic through a built-in algorithm, judges whether insulation faults occur in each loop or not, judges the type of the insulation faults and positions the positions of the insulation faults.
As shown in fig. 2, the fire emergency lighting and evacuation indicating system of the present embodiment is a centralized power supply type a system, and is composed of an emergency lighting controller and an emergency lighting centralized power supply. The centralized power supply is provided with 2 loaded loops, and the rest 6 loops are standby loops. The centralized power supply supplies power to a 01 power distribution loop and a 02 power distribution loop, the load carried by the 01 power distribution loop is 15 emergency lighting lamps, and the load carried by the 02 power distribution loop is 14 emergency lighting lamps. A centralized power supply is provided with an active and standby electric intelligent circuit breaker and an insulation detection module, and emergency lighting lamps are provided with intelligent lamp drivers.
When the power distribution system operates normally, the insulation detection module of the centralized power supply collects 01 running state information of a power distribution loop as follows:
1) 01, 15 intelligent lamp drivers are loaded on a power distribution loop, and are correspondingly numbered 0101-0115;
2) 0101-0115 intelligent lamp driver communication status is good;
3) 0101-0115 intelligent lamp driver power distribution trunk line and power distribution branch line output normally closed exit points are both in closed positions.
When the power distribution system operates normally, the insulation detection module of the centralized power supply collects 02 running state information of a power distribution loop as follows:
1) The 02 power distribution loop carries 14 intelligent lamp drivers which are correspondingly numbered from 0201 to 0214;
2) 0201-0214 intelligent lamp driver communication state is good;
3) 0201 ~ 0214 intelligent lamps and lanterns driver distribution trunk and distribution branch export normal close departure point are all in the closed position.
The insulation detection module generates the collected 01 and 02 distribution loop operation state information into a local distribution loop topological structure and uploads the topological structure to a system background, the system background reads messages and automatically generates a system topological network structure, and the operation state information and the topological structure information are stored in a database.
The time interval between the collection of information by the insulation detection module and the updating of the local topological network is 5s, and the time interval between the updating of the system topological network is 1h.
The method for detecting the insulation fault of the power distribution loop of the fire emergency lighting and evacuation indicating system is described by taking the system insulation detection daily inspection time as 2 00 in the morning and insulation faults of lamps of No. 0101 and No. 0105 power distribution loops of a centralized power supply as an example:
when a system clock is 2.
The edge detection module respectively tests the single-loop loaded ground insulation resistance according to the sequence of the 01 loop and the 02 loop, inputs 500V test voltage, measures the insulation resistance value after lasting for 15s for three times, and calculates the average value and the judgment information as follows:
1) 01, the average value R1d15 of the insulation resistance of the anode and the cathode of the loop is less than 50M omega;
2) The average value R2d15 of the insulation resistance of the anode and the cathode of the 02 loop is more than 50 MOmega;
and the insulation detection module analyzes the average value of the insulation resistance of the 01 loop and the 02 loop, judges that the 01 loop has insulation fault and marks the 01 loop as an insulation fault loop, and marks the 02 loop as a well-insulated loop and stores the well-insulated loop in an insulation detection module database.
The insulation detection module tests the no-load ground insulation resistance of the 01 loop, and the insulation resistance detection module sends a control signal to disconnect all output normally closed contacts of the 01 loop power distribution branch line, namely the 01 loop disconnects the normally closed contacts from K1011 to K1151.
The insulation detection module tests the no-load insulation resistance of a 01 loop, inputs 500V test voltage, measures the insulation resistance value after lasting for 15s for three times, and calculates the average value and judges the information as follows:
1) 01 the average value R1k15 of the anode and cathode insulation resistances of the loop is more than 50M omega, and the value is taken as 50M omega;
2) The resistance values of R1d15 and R1k15 are integrated to judge that the type of the 01 loop insulation fault is a lamp insulation fault;
and the insulation detection module marks the 01 loop as a lamp insulation fault loop, and judges the fault position of the 01 loop.
01, judging the fault position of a loop:
1) The insulation detection module acquires that the number information of 01 loop lamps is 0101-0115, namely 15 emergency lighting lamps;
2) Insulation detection moduleAutomatically generating a first-layer topology detection strategy according to a built-in dichotomy discarding algorithm, wherein the first layer is divided into Q11 and Q12 sub-loops,
if the rounding value and the lower rounding value on the loop are both larger than 1, determining that the Q11 sub-loop ranges from 0101 to 0108 lamps, and the Q12 sub-loop ranges from 0109 to 0115 lamps;
3) The insulation detection module automatically generates Q11 sub-loop control logic according to a first-layer detection strategy; the insulation detection module executes Q11 control logic to send a control signal to close K1011-K1081 normally closed contacts, 500V test voltage is input, insulation resistance values are measured after the three times of operation lasts for 15s, an average value is calculated, the average value RQ11 of the insulation resistance of the positive electrode and the negative electrode of the Q11 sub-loop is measured and is less than 50M omega, and the Q11 sub-loop is judged to be a positive electrode and negative electrode insulation fault loop;
4) The insulation detection module automatically generates Q12 sub-loop control logic according to a first-layer detection strategy; the insulation detection module executes Q11 control logic to send a control signal to disconnect K1011-K1081 normally closed contacts and close K1091-K1151 normally closed contacts, 500V test voltage is input, insulation resistance values are measured after the three times of operation lasts for 15s, the average value is calculated, the average value RQ12 of the insulation resistance of the positive electrode and the negative electrode of the Q12 sub-loop is measured and is larger than 50M omega, and the Q12 sub-loop is judged to be a good positive electrode and negative electrode insulation loop;
5) The insulation detection module judges that the topology of the Q11 sub-loop is 8 lamps and carries out the next step;
6) The insulation detection module automatically generates a topology detection strategy of a second layer according to a built-in dichotomy discarding algorithm, the second layer is divided into Q21 and Q22 sub-loops,
determining that the Q21 sub-loop ranges from 0101 to 0104 lamps and the Q22 sub-loop ranges from 0105 to 0108 lamps;
7) The insulation detection module automatically generates Q21 sub-loop control logic according to a first-layer detection strategy; the insulation detection module executes the Q21 control logic to send a control signal to disconnect the K1091-K1151 normally closed contacts and close the K1011-K1041 normally closed contacts, 500V test voltage is input, insulation resistance values are measured after the three times of operation lasts for 15s, the average value is calculated, the average value RQ21 of the insulation resistance of the positive electrode and the negative electrode of the Q21 sub-loop is measured and is less than 50M omega, and the Q21 sub-loop is judged to be a positive electrode and negative electrode insulation fault loop;
8) The insulation detection module automatically generates Q22 sub-loop control logic according to a first-layer detection strategy; the insulation detection module executes Q22 control logic to send control signals to open K1011-K1041 normally closed contacts and close K1051-K1081 normally closed contacts, 500V test voltage is input, insulation resistance values are measured after the three times of continuous operation lasts for 15s, an average value is calculated, the average value RQ22 of the positive and negative insulation resistances of the Q22 sub-loop is measured to be less than 50 MOmega, and the Q22 sub-loop is judged to be a positive and negative insulation fault loop;
9) The insulation detection module judges that the topology of the Q21 and Q22 sub-circuits is 4 lamps and executes the next step;
10 The insulation detection module automatically generates a third-layer topology detection strategy according to a built-in binary discarding algorithm, the third layer is divided into sub-loops Q31, Q32, Q33 and Q34,
if the upper rounding value and the lower rounding value of the loop are both greater than 1, determining that the Q31 sub-loop is in the range of lamps No. 0101 and 0102, the Q32 sub-loop is in the range of lamps No. 0103 and 0104, the Q33 sub-loop is in the range of lamps No. 0105 and 0106, and the Q34 sub-loop is in the range of lamps No. 0107 and 0108;
11 The insulation detection module automatically generates Q31 sub-loop control logic according to a first-layer detection strategy; the insulation detection module executes Q31 control logic to send control signals to disconnect K1051-K1081 normally closed contacts, close K1011 and K1012 normally closed contacts, input 500V test voltage, measure insulation resistance values after lasting for 15s for three times and calculate average values, measure the average value RQ31 of the positive and negative insulation resistances of the Q31 sub-loop and judge that the Q31 sub-loop is a positive and negative insulation fault loop;
12 The insulation detection module automatically generates Q32 sub-loop control logic according to a first-layer detection strategy; the insulation detection module executes a Q32 control logic to send a control signal to open K1011 and K1012 normally closed contacts, close K1013 and K1014 normally closed contacts, input 500V test voltage, measure the insulation resistance value after lasting for 15s for three times and calculate the average value, measure the average value RQ32 of the insulation resistance of the positive electrode and the negative electrode of the Q32 sub-loop and is more than 50M omega, and judge that the Q32 sub-loop is a good positive electrode and negative electrode insulation loop;
13 The insulation detection module automatically generates Q33 sub-loop control logic according to a first-layer detection strategy; the insulation detection module executes a Q33 control logic to send a control signal to open K1013 and K1014 normally closed contacts, close K1015 and K1016 normally closed contacts, input 500V test voltage, measure the insulation resistance value after lasting for 15s for three times and calculate the average value, measure the average value RQ33 of the insulation resistance of the positive electrode and the negative electrode of the Q33 sub-loop to be less than 50M omega, and judge that the Q33 sub-loop is a positive electrode and negative electrode insulation fault loop;
14 The insulation detection module automatically generates Q34 sub-loop control logic according to a first-layer detection strategy; the insulation detection module executes Q34 control logic to send control signals to open K1015 and K1016 normally closed contacts, close K1017 and K1018 normally closed contacts, input 500V test voltage, measure insulation resistance values after lasting for 15s for three times and calculate average values, measure the average value RQ34 of the positive and negative insulation resistance of the Q34 sub-loop to be more than 50M omega, and judge that the Q34 sub-loop is a good positive and negative insulation loop;
15 The insulation detection module judges that the topology of the Q31 and Q33 sub-loops is 2 lamps and executes the next step;
16 The insulation detection module automatically generates a topology detection strategy of a fourth layer according to a built-in dichotomy discarding algorithm, the fourth layer is divided into sub-loops Q41, Q42, Q43 and Q44,
if the rounding value and the lower rounding value on the loop are 1 for the first time, determining that the Q41 sub-loop is 0101 lamps, the Q42 sub-loop is 0102 lamps, the Q43 sub-loop is 0105 lamps and the Q44 sub-loop is 0106 lamps;
17 The insulation detection module automatically generates Q41 sub-loop control logic according to a first-layer detection strategy; the insulation detection module executes Q41 control logic to send control signals to disconnect K1017 and K1018 normally closed contacts, close K1011 normally closed contacts, input 500V test voltage, measure insulation resistance values after lasting for 15s for three times and calculate an average value, measure an average value RQ41 of positive and negative insulation resistance of the Q41 sub-loop to be less than 50M omega, and judge that the Q41 sub-loop is a positive and negative insulation fault loop;
18 The insulation detection module automatically generates Q42 sub-loop control logic according to a first-layer detection strategy; the insulation detection module executes Q42 control logic to send a control signal to open the K1011 normally closed contact, close the K1012 normally closed contact, input 500V test voltage, measure the insulation resistance value after lasting for 15s seconds for three times and calculate the average value, measure the average value RQ42 of the positive and negative insulation resistance of the Q42 sub-loop, is more than 50 MOmega, and judge that the Q42 sub-loop is a loop with good positive and negative insulation;
19 The insulation detection module automatically generates Q43 sub-loop control logic according to a first-layer detection strategy; the insulation detection module executes Q43 control logic to send a control signal to disconnect a K1012 normally closed contact, close a K1015 normally closed contact, input 500V test voltage, measure the insulation resistance value after lasting for 15s for three times and calculate the average value, measure the average value RQ43 of the positive and negative insulation resistance of the Q43 sub-loop to be less than 50M omega, and judge that the Q43 sub-loop is a positive and negative insulation fault loop;
20 The insulation detection module automatically generates Q44 sub-loop control logic according to a first-layer detection strategy; the insulation detection module executes Q44 control logic to send a control signal to open the K1015 normally closed contact, close the K1016 normally closed contact, input 500V test voltage, measure the insulation resistance value after lasting for 15s for three times and calculate the average value, measure the average value RQ44 of the insulation resistance of the positive electrode and the negative electrode of the Q44 sub-loop to be more than 50M omega, and judge that the Q44 sub-loop is a loop with good positive electrode and negative electrode insulation;
21 The insulation detection module judges that the topology of the Q41 and Q43 sub-circuits is 1 lamp, terminates the fault positioning process, and marks No. 0101 and No. 0105 lamps corresponding to the Q41 and Q43 sub-circuits as insulation fault lamps;
the emergency lighting centralized power supply insulation fault positioning process is terminated, the insulation detection module integrates insulation fault information and uploads the insulation fault information to a system background, and the insulation fault information is as follows:
1) Lamp insulation faults occur in a power distribution loop of the emergency lighting centralized power supply 01;
2) No. 0101, 0105 emergency lighting lamps and lanterns of insulating fault position.
The system automatically resets the main and standby switches of the emergency lighting centralized power supply and a topological structure with good insulation, and informs operation and maintenance personnel to overhaul.
To sum up, this insulation detection breaks down for lamps and lanterns insulation fault, and fire control emergency lighting and evacuation indicating system integrates the information that insulation detection module uploaded, and the alarm information that No. 0101, 0105 emergency lighting lamps and lanterns insulation fault took place is exported automatically, demonstrates this alarm information on the system interface and pushes away for the operation and maintenance personnel to operation and maintenance personnel handle fast and recover system normal operating.
Claims (5)
1. A fire emergency lighting and evacuation indication system power distribution circuit insulation fault detection method is characterized by comprising the following steps:
s1, an emergency lighting controller of a fire-fighting emergency lighting and evacuation indicating system automatically sends an insulation fault detection signal to an emergency lighting centralized power supply under the jurisdiction;
s2, after the emergency lighting centralized power supply receives the insulation fault detection signal, executing the following insulation fault detection process:
the emergency lighting centralized power supply cuts off a main power supply and a standby power supply;
the power distribution loop topology network of the emergency lighting centralized power supply is read by the insulation detection module arranged in the emergency lighting centralized power supply, and the following detection flow of the insulation resistance of the power distribution loop with the load is executed: the insulation detection module tests the single-loop ground insulation resistance according to the sequence of the loop 1 to the loop N, namely, 500V test voltage is input, at least 3 insulation resistance values are recorded respectively, then the average value Rxd of the insulation resistance values measured at each time is calculated, and whether the insulation fault occurs in the power distribution loop is judged:
if the average value Rxd is larger than or equal to the reference value of 50M omega, the insulation detection module marks the classified power distribution loop as an insulation good loop, and uploads the power supply number and the loop number information to an emergency lighting controller of a fire-fighting emergency lighting and evacuation indication system;
if the average value Rxd is smaller than the reference value 50M omega, the insulation detection module marks the classified power distribution loops as insulation fault loops, and the step three is carried out;
thirdly, the insulation detection module executes the following no-load power distribution circuit wire insulation resistance detection process on the insulation fault circuit: the insulation detection module tests the insulation resistance of the no-load conductor of the insulation fault loop to the ground, namely, 500V test voltage is input, at least 3 insulation resistance values are respectively recorded, then the average value Rxk of the insulation resistance values measured at each time is calculated, and the insulation fault type of the power distribution loop is comprehensively judged by combining the average value Rxk, the reference value 50M omega and the average value Rxd;
the insulating detection module of fourth carries out the fault location flow according to judging the insulating fault type of distribution circuit: changing the network topology structure of the emergency lighting centralized power supply according to the control logic set by the dichotomy discarding algorithm corresponding to the fault, and judging the specific position of the insulation fault;
and S3, the insulation detection module uploads the insulation fault type and the insulation fault occurrence position information to a fire-fighting emergency lighting and evacuation indication system, and the fire-fighting emergency lighting and evacuation indication system automatically resets the main and standby power switches of the emergency lighting centralized power supply and the well-insulated topological structure to inform operation and maintenance personnel of overhauling.
2. The method of claim 1, wherein the method comprises the steps of: the insulation fault types refer to lamp insulation faults, mixed insulation faults of a lead and a lamp and lead insulation faults, and the lead insulation faults refer to positive electrode insulation faults and negative electrode insulation faults.
3. The method of claim 2, wherein the method comprises: the method for comprehensively judging the type of the insulation fault of the power distribution loop comprises the following steps:
when the average value Rxk is smaller than the reference value 50M Ω, the insulation detection module calculates the insulation resistance value variation rate P = (Rxd-Rxk)/Rxd × 100% in the load and no-load states of the power distribution circuit:
when P is less than 10%, the insulation detection module judges that the insulation fault type of the power distribution circuit is a wire insulation fault;
when the P is more than or equal to 10%, the insulation detection module judges that the insulation fault type of the power distribution circuit is a mixed insulation fault of a lead and a lamp;
and when the average value Rxk is greater than or equal to the reference value of 50M omega, the insulation detection module judges that the insulation fault type of the distribution circuit is a lamp insulation fault.
4. The method of claim 3, wherein the method comprises: in the test of the detection flow of the insulation resistance of the distribution loop with the load, the single loop respectively carries out 3 to 5 times of testing the insulation resistance of the anode and the cathode to the ground, and each time of testing lasts for 15 to 30 seconds.
5. The method of claim 4, wherein the method comprises the steps of: in the test of the no-load distribution loop wire insulation resistance detection process, the single loop respectively carries out 3-5 times of positive and negative electrode ground insulation resistance tests, and each test lasts for 15-30 seconds.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116454839A (en) * | 2023-04-27 | 2023-07-18 | 合肥盎牛智能装备有限公司 | Insulation detection grounding control method |
| CN117347807A (en) * | 2023-12-04 | 2024-01-05 | 山东航天正和电子有限公司 | Insulation and voltage-withstand comprehensive test device for electric connector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116454839A (en) * | 2023-04-27 | 2023-07-18 | 合肥盎牛智能装备有限公司 | Insulation detection grounding control method |
| CN117347807A (en) * | 2023-12-04 | 2024-01-05 | 山东航天正和电子有限公司 | Insulation and voltage-withstand comprehensive test device for electric connector |
| CN117347807B (en) * | 2023-12-04 | 2024-03-26 | 山东航天正和电子有限公司 | Insulation and voltage-withstand comprehensive test device for electric connector |
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