CN208665006U - A kind of electric railway AT institute bypass breaker measure and control device - Google Patents

Abstract

The utility model discloses a kind of electric railway AT institute bypass breaker measure and control devices, belong to attached wires of AC electrified railway traction power supply measurement and control area.The input terminal of left measurement and control unit connects the measurement end of intermediate AT institute's voltage transformer and its upper left cable current transformer, bypass breaker upper left cable current transformer and left neighbour AT institute upper right cable current transformer, among output end connection AT upper left net breaker and bypass breaker control terminal；The input terminal of right measurement and control unit connects the measurement end of intermediate AT institute's voltage transformer and upper right cable current transformer, bypass breaker upper left cable current transformer and right neighbour AT institute upper left cable current transformer, output end connection centre AT upper right net breaker and bypass breaker control terminal.Using intermediate AT the comparison of size of current that measures of voltage and the current transformer of related three branches in left and right judge the position of failure generation.

Description

A kind of electric railway AT institute bypass breaker measure and control device

Technical field

The utility model belongs to attached wires of AC electrified railway traction power supply observation and control technology field.

Background technique

The AT power supply mode of electric railway has stronger power supply capacity and longer power supply compared to direct feeding system Arm lengths, it is possible to reduce electric split-phase and non-Electric region, therefore, China's high-speed rail have nearly all selected AT power supply mode.

But China mountain range, river are numerous, this often causes to be stranded to the nearest setting of the be in contact with it net sectionaliser of AT Difficulty, or even must pull open very long distance, some are up to 2km, this just need make to set up between AT institute and its sectionaliser it is very long Supply lines.AT supply lines and contact net between its sectionaliser length it is bigger, inductance is bigger, and electrification train is logical When crossing sectionaliser, unexpected conversion of the train electric current between this section of supply lines and contact net will cause overvoltage and arcing, arcing Meeting scaling loss contact line, or even contact line is blown, it leads to a disaster.

Obviously, technical problem urgently to be solved is now: under accidental conditions, train is farther away by distance AT institute Arcing is not generated when sectionaliser, and when contact net breaks down, then failure inside and outside supply lines range should be distinguished in time and accurately Section occurs and is cut off failure.

Utility model content

The purpose of the utility model is to provide a kind of electric railway AT institute bypass breaker measure and control devices, it can be effectively The technical issues of train generates arcing by the farther away sectionaliser of distance AT institute when solving to operate normally, while working as contact net When failure, then failure inside and outside supply lines range should be distinguished in time and accurately, section occurs and is cut off failure.

The purpose of this utility model is achieved through the following technical solutions: a kind of bypassed open circuit of electric railway AT Device measure and control device, bit selecting in left neighbour AT institute, right neighbour AT intermediate AT institute, the intermediate AT institute and contact net T, rail R, negative feeder F and left neighbour AT institute, the collectively constituted power supply system of electrified railway of right neighbour AT；Wherein: measure and control device is arranged in intermediate AT institute, It is divided into left and right two measurement and control units；The input terminal connection voltage transformer YH and current transformer LH21, electric current of left measurement and control unit The measurement end of mutual inductor LH1 and current transformer LH12, output end connect the upper left net breaker DL21 of intermediate AT institute with The control terminal of bypass breaker PD；The input terminal connection voltage transformer YH and current transformer LH23, electric current of right measurement and control unit The measurement end of mutual inductor LH2 and current transformer LH32, output end connect the upper right net breaker DL23 of intermediate AT institute with The control terminal of bypass breaker PD.

Preferably, the bypass breaker PD is set at two FD2 of sectionaliser, and one end of bypass breaker PD is by therewith Concatenated current transformer LH1 and upper cable SW1 are connected to nearby on the contact net T of two left end FD2 of sectionaliser, bypass breaker The other end of PD is connected to connecing for two FD2 right end of sectionaliser by current transformer LH2 connected in series and upper cable SW2 nearby On net-fault T；Bypass breaker PD is normally closed.

Preferably, left neighbour AT self coupling become an AT1 contact net terminal pass through upper left net breaker DL10 and upper left net Line SW10 is connected to nearby on the contact net T of one left end FD1 of sectionaliser, left neighbour AT self coupling become an AT1 contact net terminal It is connected on the contact net T of one FD1 right end of sectionaliser nearby by upper right net breaker DL12 and upper right cable SW12, sectionaliser One FD1 be serially connected in left neighbour AT side contact net T in；Right neighbour AT self coupling become three AT3 contact net terminal pass through upper left Net breaker DL32 and upper left cable SW32 is connected to the contact net T of three left end FD3 of sectionaliser nearby.

Preferably, right neighbour AT self coupling become three AT3 contact net terminal pass through upper right net breaker DL34 and upper right net Line SW34 is connected to nearby on the contact net T of three FD3 right end of sectionaliser, three FD3 of sectionaliser be serially connected in right neighbour AT side connect In net-fault T.

Preferably, intermediate AT self coupling become two AT2 contact net terminal pass through upper left net breaker DL21 and upper left net Line SW21 is connected to nearby on the contact net T of two left end FD2 of sectionaliser, referred to as the intermediate institute upper left AT site, is denoted as S, intermediate AT Self coupling become the contact net terminal of two AT2 the right side sectionaliser two FD2 be connected to by upper right net breaker DL23 and supply lines GD On the contact net T at end.

The working principle of the utility model is: bypass breaker is in parallel with sectionaliser, when normal operation, bypass breaker is closed Lock bypasses sectionaliser, while the upper cable of bypass breaker keeps most short, then makes the inductance L of shunt circuit conducting wire minimum, column Transient voltage Ldi/dt when vehicle belt current i passes through sectionaliser reaches minimum, or even close to 0, make train electric current i successfully from point One end of section device is transferred to the other end, to eliminate arcing condition.Under fault condition, using intermediate AT voltage and correlation three The size of current that the current transformer of branch measures relatively judges the position that failure occurs.

Compared with prior art, the utility model has the beneficial effects that

One, installation and is surfed the Internet at bypass breaker nearby, can eliminate electrification train by intermediate AT electric segmentation when production Raw phenomenon of arc discharge, avoids contact with the accident of line and sectionaliser burnt and thus cause bow net.

Two, it can find, distinguish accurately and in time, various contact net failures are isolated, while guaranteeing that fault-free section continues Power supply, operation, reduce scope of power outage to the maximum extent, the extension for avoiding failure from influencing, and further increase Traction networks power supply Reliability.

Three, the relevant apparatus investment being related to is less, easy to implement, both uses convenient for new line, is also convenient for old line transformation.

Detailed description of the invention

Fig. 1 is the system schematic of the utility model.

Fig. 2 is the left measurement and control unit input of the utility model, output relation figure.

Fig. 3 is the right measurement and control unit input of the utility model, output relation figure.

Specific embodiment

The utility model will be further described with reference to the accompanying drawings and detailed description.

Fig. 1 is shown, a kind of specific embodiment of the utility model are as follows: a kind of electric railway AT institute's bypass breaker survey Control device, bit selecting in left neighbour AT institute, right neighbour AT intermediate AT institute, the intermediate AT with contact net T, rail R, negative feeder F and Left neighbour AT institute, the collectively constituted power supply system of electrified railway of right neighbour AT；Measure and control device setting in intermediate AT institute, be divided into it is left, Right two measurement and control units；The input terminal connection voltage transformer YH and current transformer LH21, current transformer of left measurement and control unit The measurement end of LH1 and current transformer LH12, output end connects the upper left net breaker DL21 of intermediate AT institute and bypass is broken The control terminal of road device PD；The input terminal connection voltage transformer YH and current transformer LH23, current transformer of right measurement and control unit The measurement end of LH2 and current transformer LH32, output end connects the upper right net breaker DL23 of intermediate AT institute and bypass is broken The control terminal of road device PD.

The bypass breaker PD is set at two FD2 of sectionaliser, and one end of bypass breaker PD passes through connected in series Current transformer LH1 and upper cable SW1 are connected to nearby on the contact net T of two left end FD2 of sectionaliser, and bypass breaker PD's is another One end is connected to the contact net T of two FD2 right end of sectionaliser by current transformer LH2 connected in series and upper cable SW2 nearby On；Bypass breaker PD is normally closed.

Left neighbour AT self coupling become an AT1 contact net terminal by upper left net breaker DL10 and upper left cable SW10 just Closely be connected on the contact net T of one left end FD1 of sectionaliser, left neighbour AT self coupling become an AT1 contact net terminal pass through upper right Net breaker DL12 and upper right cable SW12 are connected to nearby on the contact net T of one FD1 right end of sectionaliser, one FD1 of sectionaliser string Connect left neighbour AT beside contact net in；Right neighbour AT self coupling become three AT3 contact net terminal pass through upper left net breaker DL32 and upper left cable SW32 are connected to nearby on the contact net T of three left end FD3 of sectionaliser, right neighbour AT self coupling become three AT3 Contact net terminal the contact of three FD3 right end of sectionaliser is connected to upper right cable SW34 by upper right net breaker DL34 nearby Net T on, three FD3 of sectionaliser be serially connected in right neighbour AT beside contact net in；Intermediate AT self coupling become two AT2 contact net end Son is connected on the contact net T of two left end FD2 of sectionaliser nearby by upper left net breaker DL21 and upper left cable SW21, referred to as The intermediate institute upper left AT site S, intermediate AT self coupling become two AT2 contact net terminal pass through upper right net breaker DL23 and power supply Line GD is connected on the contact net T of two FD2 right end of sectionaliser；One FD1 of sectionaliser, the equal energy of sectionaliser two FD2 and three FD3 of sectionaliser Train is powered off not to pass through；LH12 is denoted as with the concatenated current transformer of upper right net breaker DL12；With upper left net breaker The concatenated current transformer of DL21 is denoted as LH21, is denoted as LH23 with the concatenated current transformer of upper right net breaker DL23；With a left side The online concatenated current transformer of breaker DL32 is denoted as LH32；Voltage transformer between intermediate AT institute contact net T and rail R It is denoted as YH；Bypass breaker PD is set at two FD2 of sectionaliser, and one end of bypass breaker PD passes through Current Mutual Inductance connected in series Device LH1 and upper cable SW1 are connected to nearby on the contact net T of two left end FD2 of sectionaliser, and the other end of bypass breaker PD passes through Current transformer LH2 connected in series and upper cable SW2 are connected to nearby on the contact net T of two FD2 right end of sectionaliser；Bypass is disconnected Road device PD is normally closed.

Fig. 2 shows the inputs of the left measurement and control unit of measure and control device, output relation figure.The input terminal of left measurement and control unit connects voltage The measurement end of mutual inductor YH and current transformer LH21, current transformer LH1 and current transformer LH12, output end connection Intermediate AT upper left net breaker DL21 and bypass breaker PD control terminal.

Fig. 3 is the right measurement and control unit input of the utility model embodiment, output relation figure.The input terminal of right measurement and control unit connects The measurement end of voltage transformer YH and current transformer LH23, current transformer LH2 and current transformer LH32 are connect, is exported End connect intermediate AT upper right net breaker DL23 and bypass breaker PD control terminal.

The investigating method is: when the voltage that voltage transformer YH is measured is lower than state threshold, if current transformer The sum of electric current that LH21, current transformer LH1 are measured and the absolute value of the difference of the current transformer LH12 electric current measured are greater than Maximum imbalance current, then assert the intermediate institute upper left AT site S and left neighbour AT between contact net or upper left site S and segmentation Short circuit occurs for the contact net between device FD2, at this point, left measurement and control unit order upper left net breaker DL21 and bypass breaker PD is jumped Lock；If the difference of the sum of electric current that current transformer LH23, current transformer LH2 are measured and the current transformer LH32 electric current measured The absolute value of value is greater than maximum imbalance current, then assert that the contact net generation between two FD2 of sectionaliser and right neighbour AT institute is short-circuit, At this point, right measurement and control unit order upper right net breaker DL23 and bypass breaker PD tripping.

Claims (5)

1. a kind of electric railway AT institute bypass breaker measure and control device, bit selecting in left neighbour AT institute, right neighbour AT intermediate AT institute, The intermediate AT institute and contact net T, rail R, negative feeder F and left neighbour AT institute, the collectively constituted electric railway AT of right neighbour AT power System；It is characterized by: measure and control device is arranged in intermediate AT institute, it is divided into left and right two measurement and control units；The input of left measurement and control unit The measurement end of end connection voltage transformer YH and current transformer LH21, current transformer LH1 and current transformer LH12, Output end connect intermediate AT upper left net breaker DL21 and bypass breaker PD control terminal；The input terminal of right measurement and control unit The measurement end of voltage transformer YH and current transformer LH23, current transformer LH2 and current transformer LH32 are connected, it is defeated Outlet connect intermediate AT upper right net breaker DL23 and bypass breaker PD control terminal.

2. electric railway AT institute according to claim 1 bypass breaker measure and control device, it is characterised in that: the bypass Breaker PD is set at two FD2 of sectionaliser, and one end of bypass breaker PD passes through current transformer LH1 connected in series and upper Cable SW1 is connected to nearby on the contact net T of two left end FD2 of sectionaliser, and the other end of bypass breaker PD passes through connected in series Current transformer LH2 and upper cable SW2 be connected on the contact net T of two FD2 right end of sectionaliser nearby；Bypass breaker PD is normal It closes.

3. electric railway AT institute according to claim 1 bypass breaker measure and control device, it is characterised in that: left neighbour AT institute Self coupling become the contact net terminal of an AT1 sectionaliser one be connected to by upper left net breaker DL10 and upper left cable SW10 nearby On the contact net T of the left end FD1, left neighbour AT self coupling become an AT1 contact net terminal pass through upper right net breaker DL12 and the right side Upper cable SW12 is connected to nearby on the contact net T of one FD1 right end of sectionaliser, and one FD1 of sectionaliser is serially connected in left neighbour AT institute side Contact net T in；Right neighbour AT self coupling become three AT3 contact net terminal pass through upper left net breaker DL32 and upper left cable SW32 is connected to the contact net T of three left end FD3 of sectionaliser nearby.

4. electric railway AT institute according to claim 1 bypass breaker measure and control device, which is characterized in that right neighbour AT institute Self coupling become the contact net terminal of three AT3 sectionaliser three be connected to by upper right net breaker DL34 and upper right cable SW34 nearby On the contact net T of FD3 right end, three FD3 of sectionaliser be serially connected in right neighbour AT side contact net T in.

5. electric railway AT institute according to claim 1 bypass breaker measure and control device, which is characterized in that intermediate AT institute Self coupling become the contact net terminal of two AT2 sectionaliser two be connected to by upper left net breaker DL21 and upper left cable SW21 nearby On the contact net T of the left end FD2, the referred to as intermediate institute upper left AT site is denoted as S, the contact net end of two AT2 of self coupling change of intermediate AT institute Son is connected on the contact net T of two FD2 right end of sectionaliser by upper right net breaker DL23 and supply lines GD.