CN107433883B - Railway traction power supply arm integrated monitoring system - Google Patents
Railway traction power supply arm integrated monitoring system Download PDFInfo
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- CN107433883B CN107433883B CN201610350947.4A CN201610350947A CN107433883B CN 107433883 B CN107433883 B CN 107433883B CN 201610350947 A CN201610350947 A CN 201610350947A CN 107433883 B CN107433883 B CN 107433883B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
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Abstract
The invention relates to a railway traction power supply arm integrated monitoring system, which mainly discusses a power supply arm and comprises a traction substation, a subarea station, an electric contact network isolation switch station and a switching station, wherein when the traction substation, the subarea station, the electric contact network isolation switch station and the switching station have faults, the position of the power supply arm where the fault is located is judged through electric quantity characteristics in the traction substation, the subarea station, the electric contact network isolation switch station and the switching station, fault information sharing is realized through an optical fiber Ethernet, namely, the protection at two ends of each work point is connected, the state quantity of the fault information acquired at each end is transmitted to the opposite side, and the fault point is judged to be in the range of a feeder line or out of the range of the feeder line through comparing the state quantities of the fault information at the two ends, so that the power supply arm. And selective tripping is carried out, and the selectivity and the automation degree of railway traction power supply are improved.
Description
Technical Field
The invention relates to a railway traction power supply arm integrated monitoring system, which directly communicates with protection, measurement and control equipment in a power supply range of a traction substation through a traction substation monitoring host to realize operation monitoring and management of a power supply arm subarea station, a contact network electric switch or a switching station of the traction substation.
Background
The traction power supply system of the electrified railway plays an important role in supplying power to the electric locomotive in the transportation of the electrified railway, has high requirements on the safety and reliability of the traction power supply system, and can quickly and accurately remove the fault when a power supply arm fails and quickly recover the normal operation; the traditional railway traction power supply arm protection system has the following problems that 1) one traction power supply arm in a railway double-line section is provided with a section station and a contact net electric isolating switch, namely, one power supply arm is divided into a plurality of units; the feeder protection setting of the traction substation is that power is supplied in parallel to the subarea station, when a fault occurs near an outlet of the subarea station, the circuit breakers of the upper feeder line and the lower feeder line of the traction substation and the circuit breakers of the subarea station can possibly act (the distance protection only depends on a setting value to ensure the selectivity), the non-fault power supply arm supplies power through reclosing (the action times of the circuit breakers are increased), and the protection of the traction substation cannot accurately judge a fault section; 2) the opening and closing process of the circuit breaker may cause malfunction, which also has potential fault threat to the whole traction network.
If the power supply arm formed by the traction substation, the subarea station and the contact net electric isolating switch is monitored in an integrated mode, under the condition that the traction power supply arm breaks down, fault points are accurately positioned through systematic management, selective tripping is carried out, the fault points are cut off, and normal power supply of a non-fault area is guaranteed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an integrated monitoring system for constructing a traction substation, a subarea substation and an electric isolating switch of a contact net, which takes an IEC61850 communication technology as a core, takes the traction substation as a leading factor, and establishes a protection configuration, a GOOSE subscription protection relation and a communication network topological relation, namely a process layer network facing panoramic data of the traction substation is constructed, so that the standardized network sharing of original analog quantity information, state information and operation control is realized, the GOOSE technology is used for realizing the fault subarea function of the power supply arms of the traction substation, the subarea substation and the electric isolating switch of the contact net, and a fault section is identified through the quick information interaction of a protection device so as to lock the misoperation and reclosing of a circuit breaker of a non-fault power supply arm; identifying fault information of a fault section by utilizing the fault direction of the section I of the distance protected by the partitions, transmitting the information to a corresponding protection device by utilizing a GOOSE network, and further locking the section I of the protection device for short delay; the function can select to put into the locking, the locking overcurrent I section and the locking distance I section according to the requirement. The feeder line selectivity function is enhanced, and the intellectualization of the traction power supply system is realized.
A railway traction power supply arm integrated monitoring system comprises a power supply arm at one side of a traction substation, an uplink feeder line and a downlink feeder line, wherein each circuit breaker is provided with a set of feeder line protection and control device, each contact net electric isolating switch in a section is provided with a set of control and control device, each circuit breaker of a subarea is provided with a set of feeder line protection and control device, each circuit breaker of an adjacent main station is respectively provided with a set of feeder line protection and control device, and a closed loop of the subarea can supply power in a cross; the adjacent protection devices of the same power supply arm are paired to jointly complete protection action tripping; the method comprises the following steps that a traction substation feeder line overcurrent I section, a distance II section and a primary reclosing are carried out, and the protection range is up to the full length of a subarea substation line; the feeder distance II section and the overcurrent II section of each subarea correspond to an uplink protection device in the forward direction, correspond to a downlink protection device in the reverse direction, perform failure protection, subscribe the protection action GOOSE of the adjacent protection devices of the same power supply arm, the position of a circuit breaker of each subarea and the current amplitude fault time of the feeder of the uplink or downlink protection device; the adjacent protection device of the power supply arm transmits and receives states based on a GOOSE technology, and when a feeder line current fault is detected, corresponding protection starting positions '1' in the GOOSE are respectively set and transmitted to a network; the communication network is based on IEC61850 GOOSE technology fiber Ethernet.
A traction substation feeder line is provided with an overcurrent I section, a distance I section, a primary reclosing switch and a distance II section; the feeder line arranged in a partition is bidirectional away from the I section, bidirectional at the overcurrent I section and one-time reclosing; overcurrent protection and distance protection devices each using a state quantity difference action as a starting quantity; the electric isolating switch of the contact net is controlled by a local measurement and control device, and the control logic is realized by a feeder device of the traction station.
Determining the direction D of the current of each device according to a system main wiring diagram and a specified positive current direction;
calculating protection parameters of each device according to the system line model and issuing the protection parameters to each protection device, wherein each protection device measures the electric quantity of the fault line in real time and acts correctly, and the specific provisions are as follows: protection actions Dn, Dn =1 represents positive direction actions, Dn = -1 represents negative direction actions, n represents a device number, and D1 represents 1 QF; the initial value Dn =0, and the initial value Dn =0 is recovered after action or reclosure;
each protection device in the system runs on line, when the system breaks down, protection action Dn' GOOSE information is sent to the protection device of the main station of the traction substation and each subscription device, and the local circuit breaker or the non-tripping circuit breaker is tripped by the main station of the traction substation, the electric disconnecting switch of the contact network, the subarea substation and the other side immediately and in a delayed mode according to logic, so that the integrated protection function of the power supply arm is realized.
The device runs online, receives the GOOSE information sent by the device which has subscribed the information, and performs protection logic judgment.
1) Main station (traction substation) feeder protection 1QF and 2QF
When the GOOSE information of the power supply arm electric isolating switch station and the zone is received, the protection is judged according to the logic, and the protection action outlet can be delayed and jumped when the action condition is met.
2) Contact net electric isolating switches 3QS, 4QS, 5QS and 6QS and current transformer CT for measurement
And when the GOOSE information of the power supply arm subareas and the master station action is received, the switch control judges according to the logic, and the control device executes the combination and division instruction when the action condition is met.
3) Partition institute 7QF, 8QF
When the action GOOSE information of the power supply arm electric isolating switch station master station is received, the protection is judged according to logic, and the action condition is met, the action outlet is protected and started.
4) Master station of the other party
When the GOOSE information of the power supply arm electric isolating switch station and the zone is received, the protection is judged according to the logic, and the protection action outlet can be delayed and jumped when the action condition is met.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the method provided by the invention, the circuit breaker is prevented from being superposed on a permanent fault point and being impacted by fault current when superposed.
2. In the method provided by the invention, the action criterion can correctly distinguish the normal operation area and the fault area, and is specifically marked and displayed in the system network diagram.
3. According to the method, logical locking is realized by using protection devices configured in a traction substation and a subarea and by adopting the IEC 61850-based GOOSE technology according to the semaphore of each protection device when a fault occurs. The logic is easy to realize, simple and reliable.
Drawings
FIG. 1 is a GOOSE network diagram of a power supply arm integrated monitoring system according to the method of the present invention.
Fig. 2 is a schematic diagram of the fault location of the method of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
In the embodiment, the traction substation, the electric isolation switch station and the subarea station all adopt protection devices supporting the GOOSE service of the 8 th-1 st part of the DL/T860.81 of DL/T860 transformer substation communication network and system.
FIG. 1 shows a certain application of the method of the invention: a power supply arm on one side of a traction substation is provided with an uplink line and a downlink line (feeder), each circuit breaker is provided with 1 set of feeder protection and control device, a contact network electric isolating switch (switching station) is provided with 1 set of control and control device, a feeder protection and control device is arranged in a subarea, and a closed loop of a subarea station can supply power in a cross-district mode in an operation mode.
Taking the system diagram of fig. 1 as an example for explanation, the method specifically comprises the following steps:
step one, drawing a main wiring diagram and a device configuration diagram according to the whole system and each electric main wiring.
And step two, allocating the IP address range of each device and determining the IP address of each device.
The relay protection completes the incidence relation of each device according to the system model, generates a device setting fixed value, and downloads the action logic to the corresponding protection device.
GOOSE information for each device subscribing to other associated devices is shown in table 1.
Table 1 subscription information table
1. Logic for validating device action, e.g. fault short-circuit point in fig. 2
The K1 point has a fault, 1QF and 7QF state quantity differential overcurrent protection operates successively, meanwhile, the 1QF judges that the fault point is between 3QS and 5QS of the isolation knife according to the current magnitude and the current direction at the 3QS and 5QS, 3QS and 5QS brake-off instructions are sent, after the 3QS and 5QS are separated, 1QF reclosing and 1QF send 7QF closing self-weight instructions, and the execution result is as follows: 1QF and 7QF reclosing, 3QS and 5QS opening; the overcurrent I section and the distance I section of the 2QF device are locked when the system partition operates in a closed loop mode, 7QF is in a closed position, 3QS and 5QS are in a separated position, 2QF operates independently, the overcurrent I section and the distance I section are opened, the full length of a power supply arm in a protection range is ensured, the 7QF forward distance I section protects the interval between 7QF and 5QS, and at the moment, if a K2 point breaks down, the 7QF device reversely overflows the overcurrent I section and the reverse distance I section and acts in succession.
And (3) action results: 1QF and 7QF are switched off, 3QS and 5QS are switched off, then 1QF and 7QF are re-switched on, 2QF does not act, fault K1 point isolation is completed, 2QF overcurrent I section and distance I section protection are opened, and 7QF reverse impedance I section protects the interval between 7QF and 5 QS.
2. K2 failure point (7 QF closed loop operation)
A fault occurs at the K2 point, 2QF and 7QF state quantity differential overcurrent protection acts successively, meanwhile, the 2QF judges that the fault point is between 4QS and 6QS of the isolation knife according to the current magnitude and the current direction at the 4QS and 6QS points, 4QS and 6QS branch instructions are sent, the 2QF and 7QF are reclosed, and the execution result is as follows: 2QF and 7QF reclosing, 4QS and 6QS opening; the overcurrent I section and the distance I section of the 1QF device are locked when the closed loop operation of the system subarea is carried out, after 4QS and 6QS are switched off, the 1QF device independently operates, the overcurrent I section and the distance I section are opened, the full length of a power supply arm is protected, and the 7QF reverse impedance I section protects the 7QF and 6QS interval.
And (3) action results: 1QF and 7QF actions trip, 3QS and 5QS brake opening, 1QF and 7QF reclosing, and fault K2 point isolation is completed.
3. Cross-region K3 fault point (7 QF open loop operation)
The sub-area is spanned for power supply, 7QF and 8QF are positioned in the sub-position, 1QS is positioned in the closed position, 2QS is positioned in the closed position, the 1QF device overflows the II section and the distance II section and is opened, a point K3 breaks down, the 1QF overflows the II section and the distance II section and acts, and the full length of the power supply arm in the protection range and the full length of the power supply arm on the opposite side are added.
And (3) action results: 1QF action, breaker off, 1QF judging according to current at 3QS and 5QS
And a fault point is between 5QS and 9QF of the isolating knife, 5QS switching-off is performed on 1QF, 1QF self-weight switching-on is performed, and fault K3 point isolation is completed. Other points have faults in the same way, and the control of the integrated protection action of the traction power supply arm is realized.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present application and not for limiting the scope of protection thereof, and although the present application is described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that after reading the present application, they can make various changes, modifications or equivalents to the specific embodiments of the application, but these changes, modifications or equivalents are all within the scope of protection of the claims to be filed.
Claims (7)
1. Railway pulls power supply arm integration monitored control system, its characterized in that: a power supply arm on one side of a traction substation is provided with two feeders in an up-down direction, each breaker is provided with a feeder protection and control device, each contact net electric isolating switch in a section is provided with a feeder protection and control device, each breaker of a subarea is provided with a feeder protection and control device, each breaker of an adjacent main station is respectively provided with a feeder protection and control device, and a closed loop of the subarea can supply power in a cross-district manner; the adjacent protection devices of the same power supply arm are paired to jointly complete protection action tripping; the method comprises the following steps that a traction substation feeder line overcurrent I section, a distance II section and a primary reclosing are carried out, and the protection range is up to the full length of a subarea substation line; the feeder distance II section and the overcurrent II section of each subarea correspond to an uplink protection device in the forward direction, correspond to a downlink protection device in the reverse direction, perform failure protection, subscribe the protection action GOOSE of the adjacent protection devices of the same power supply arm, the position of a circuit breaker of each subarea and the current amplitude fault time of the feeder of the uplink or downlink protection device; the adjacent protection device of the power supply arm transmits and receives states based on a GOOSE technology, and when a feeder line current fault is detected, corresponding protection starting positions '1' in the GOOSE are respectively set and transmitted to a network; the communication network is based on IEC61850 GOOSE technology fiber Ethernet.
2. The railway traction power supply arm integrated monitoring system of claim 1, wherein: setting an overcurrent protection and distance protection device taking state quantity difference action as starting quantity, wherein a feeder line of a traction substation is provided with an overcurrent I section, a distance I section, a primary reclosing switch and a distance II section; the feeder line arranged in a partition is bidirectional away from the I section, bidirectional at the overcurrent I section and one-time reclosing; overcurrent protection and distance protection devices each using a state quantity difference action as a starting quantity; the electric isolating switch of the contact net is controlled by a local measurement and control device, and the control logic is realized by a feeder device of the traction station.
3. The railway traction power arm integrated monitoring system of claim 1, wherein: the main wiring diagram of the system and the specified current flow from the bus to the line are the positive directions of the current, and the downward flow and the upward behavior of the protection current in the subareas are the positive directions, so that the current direction D of each device is determined; calculating protection parameters of each device according to the system line model and issuing the protection parameters to each protection device, wherein each protection device measures the electric quantity of the fault line in real time and acts correctly, and the specific provisions are as follows: protection actions Dn, Dn =1 represents positive direction actions, Dn = -1 represents negative direction actions, n represents a device number, and D1 represents 1 QF; the initial value Dn =0, and the initial value Dn =0 is recovered after action or reclosure; each protection device in the system runs on line, when the system breaks down, protection action Dn' GOOSE information is sent to the protection device of the main station of the traction substation and each subscription device, and the local circuit breaker or the non-tripping circuit breaker is tripped by the traction substation, the electric disconnecting switch of the contact network, the subarea station and the adjacent main station of the other side immediately and in a delayed manner according to logic, so that the integrated protection function of the power supply arm is realized.
4. The railway traction power supply arm integrated monitoring system of claim 3, wherein: when the traction substation receives the GOOSE information of actions of the power supply arm electric disconnecting switch station and the zoning station, the protection is judged according to the logic, and the protection action outlet can be delayed and jumped when the action condition is met.
5. The railway traction power supply arm integrated monitoring system of claim 4, wherein: when the contact net electric isolating switch receives the GOOSE information of the power supply arm zone station and the main station action, the switch control judges according to the logic, and when the action condition is met, the control device executes a combination and division instruction.
6. The railway traction power supply arm integrated monitoring system of claim 3, wherein: when the subarea station receives the GOOSE information of the action of the master station of the power supply arm electric disconnecting switch station, the protection judges according to the logic, and the action exit is protected when the action condition is met.
7. The railway traction power supply arm integrated monitoring system of claim 3, wherein: and when the other master station receives the GOOSE information of the power supply arm electric disconnecting switch station and the subarea, the protection judges according to logic, and the protection action outlet can be delayed and jumped when the action condition is met.
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| CN108490292B (en) * | 2018-03-21 | 2020-08-18 | 中铁第四勘察设计院集团有限公司 | Train running section online monitoring method and system |
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| CN110350497B (en) * | 2019-07-16 | 2022-07-26 | 成都交大运达电气有限公司 | Cooperative protection method for electrified railway substation and switching station |
| CN110416979A (en) * | 2019-07-22 | 2019-11-05 | 成都运达润泰信息科技有限公司 | AT subregion institute bus bar protecting method in one's power under all-parallel AT traction system mode |
| CN111987718B (en) * | 2020-08-18 | 2021-11-16 | 北京南凯自动化系统工程有限公司 | Electrified railway traction power supply scheduling fault type judgment and emergency treatment method |
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| CN113022389B (en) * | 2020-09-21 | 2022-11-29 | 西南交通大学 | Relay protection method for traction network power supply arm based on directional impedance element |
| CN112421761B (en) * | 2020-11-29 | 2022-10-14 | 西南交通大学 | Relay protection reconstruction self-healing method for hub traction power supply system |
| CN112803382A (en) * | 2021-03-10 | 2021-05-14 | 中铁电气化局集团有限公司 | Full-through flexible traction power supply system contact net protection method based on current criterion |
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