CN207866882U - A kind of list instrument secondary pressurized device - Google Patents

Abstract

The utility model discloses a kind of single instrument secondary pressurized devices, for substation secondary measure voltage ＆ current, coil of cable drum, switching switch and alarm of the output voltage to voltage combining unit, output current to electric current combining unit, including chamber and inside chamber；The cable of the coil of cable drum is connect by switching switch selection with power output terminal or secondary pressurized leading-out terminal, and switching cable is connected with external power supply or with the experiment wire terminal for connecting relay protection instrument respectively；Cable is constituted with external power supply is additionally provided with voltage blocking relay in electric power loop, the alarm setting is in cable and external power supply constitute electric power loop.

Description

A kind of list instrument secondary pressurized device

Technical field

The utility model is related to substation's technical field, especially a kind of single instrument secondary pressurized dress based on cable drum It sets.

Background technology

Different by the way of cable sampling from traditional substation's Current Voltage circuit, the Current Voltage of intelligent substation is all It is that analog quantity Current Voltage is converted by digital quantity by combining unit, protection supervisory equipment is then sent to by optical fiber.By Protection is sent in intelligent substation secondary voltage and current by optical fiber again after GIS convergence control cabinets are by opto-electronic conversion mostly to survey Equipment is controlled, when detecting the work such as voltage and current combining unit sampling precision, the detection of telemetering amount, verification kilowatt-hour meter sampling, debugging Personnel need to add analog quantity by voltage and current secondary terminals, since voltage and current secondary terminals are not in same convergence control cabinet, have A bit also apart from distant, commissioning device is spaced power-up flow field simulation amount in this debugging under normal conditions, uses long line progress secondary side Pressurization thus must complete pressurized operation using the secondary pressurized line up to tens meters.It is adopted at present in progress voltage and current When sample detection, secondary pressurized work is generally carried out using long cable, and long cable retractable cable link is typically artificial disc Line, and reconfiguration line (including test wire wiring, instrument power source wiring, test apparatus prepare in place) is also to pass through a root long cable Constantly move left and right, it is time-consuming longer, it is inefficient, and due to unspecial long cable storing tools, store or used It is easy to be damaged in journey.

Utility model content

The purpose of this utility model is to provide a kind of single instrument secondary pressurized device, and shortening changes setting up time, reduces power transformation The non-test time proportion of secondary pressurized of standing.

To achieve the above object, the utility model uses following technical proposals：

A kind of list instrument secondary pressurized device, is used for substation secondary measure voltage ＆ current, and output voltage to voltage merges Unit, output current to electric current combining unit, including chamber and coil of cable drum inside chamber, switching switch and Alarm；The cable of the coil of cable drum is by switching switch selection and power output terminal or secondary pressurized leading-out terminal Connection, switching cable are connected with external power supply or with the experiment wire terminal for connecting relay protection instrument respectively；Cable with it is external Voltage blocking relay is additionally provided in electric power generating composition electric power loop, the alarm setting is constituted in cable and external power supply In electric power loop.

Further, the normally opened contact of the voltage blocking relay is connect with switching switch and output voltage terminals, institute The coil for stating voltage blocking relay is arranged in the circuit that cable and external power supply are constituted.

Further, the switching switch includes switching node SA1：Cable and secondary pressurized terminal break-make are controlled, is opened Artis SA2：Control cable and power output terminal break-make, switching node SA3：Circuit break-make where controlling alarm；Institute Switching switch selection cable is stated when connect with secondary pressurized leading-out terminal, switching node SA1 and switching node SA3 closures are opened Artis SA2 is disconnected；When switching switch selection cable is connect with power output terminal, switching node SA1 and switching node SA3 It disconnects, switching node SA2 is closed.

Further, inside chamber include two coil of cable drums, two switching switches, two voltages switching relays Device；Realize that both direction cable Telescopic, a direction are that cable output experiment electric current is connect with electric current combining unit, Another direction is that cable merges connection with voltage.

The utility model has the beneficial effects that

The utility model is carried out at the same time voltage and current using a test apparatus and exports, and test apparatus is located at current intervals, Voltage is delivered to voltage spaces, cable drum test wire joint system by the cable drum test wire in secondary pressurized device Make dedicated testing terminal plug, and increase secondary pressurized installation's power source function, while two cable drums are concentrated on one In chamber, the long line Telescopic of left and right both direction is realized, complete secondary pressurized test job.One test apparatus can be same When complete Current Voltage test job, hold facility rate is low, and does not need other accessory systems or device；Cable drum retractable cable Mode is efficient, and conveniently；Device attached power supply function and realize the long line Telescopic of device both direction, reduces and changes Setting up time.

Description of the drawings

Fig. 1 is double instrument secondary pressurized schematic devices based on synchronous clock synchronization；

Fig. 2 is single instrument secondary pressurized schematic device of the utility model based on cable drum；

Fig. 3 is element arrangement schematic diagram in embodiment chamber；

Fig. 4 is band alarm and blocking voltage relay-type cable drum schematic diagram；

Fig. 5 is band blocking voltage relay-type secondary pressurized cable drum schematic diagram,

Wherein, 1, voltage blocking relay；2, power output terminal；3, secondary pressurized leading-out terminal；4, switching switch；5、 Alarm；6, cable outlet；7, cable drum；8, crank.

Specific implementation mode

At present when carrying out the detection of voltage and current sampled value, secondary pressurized work is generally carried out using long cable, and is grown Cable retractable cable link is typically artificial disc line, and reconfiguration line (including test wire wiring, instrument power source wiring, test apparatus It is in place to prepare) it is also constantly to be moved left and right by a root long cable, it is time-consuming longer, it is inefficient, and due to unspecial Long cable storing tools are easy to be damaged during storage or use, and statistics in January, 2016 to May company is building 500kV Blue mound intelligent substation, 220kV Chinese river intelligent substation secondary pressurized operation time situation are as shown in table 1：

1 intelligent substation secondary pressurized operation time of table statistical form (unit：Hour)

As can be seen from the above table, secondary pressurized is by the way of the long cable of tradition, and retractable cable, to change setting up time longer, The non-test time accounts for total time ratio and reaches 40% or more, and traditional secondary pressuring method is inefficient, needs to be further increased.

As shown in Figure 1, double instrument secondary pressurized devices are to carry out voltage and current test, an examination using two test apparatuses Instrument is tested in voltage spaces output voltage, another test apparatus is in current intervals output current, while to two test apparatuses Clock synchronization processing is synchronized, generally use substation field GPS two test apparatuses of time synchronization system pair are set time, two experiments Instrument is respectively set to be exported using GPS triggering modes, to realize the accurate output of Current Voltage phase relation.This method has Following disadvantage：1. needing while using 2 test apparatuses, hold facility rate is high, and carries inconvenience；2. 220V at 2 is needed to hand over Galvanic electricity source is that 2 test instruments are powered, and needs to draw by power supply reel in special circumstances and connects alternating current, time-consuming and laborious；3. being limited to Substation's time synchronization system running.

It being exported as shown in Fig. 2, being carried out at the same time voltage and current using a test apparatus, test apparatus is located at current intervals, Voltage is delivered to voltage spaces, cable drum test wire joint system by the cable drum test wire in secondary pressurized device Make dedicated testing terminal plug, and increase secondary pressurized installation's power source function, while two cable drums are concentrated on one In chamber, the long line Telescopic of left and right both direction is realized, complete secondary pressurized test job.It has the following advantages that：1. one Platform test apparatus can be completed at the same time Current Voltage test job, and hold facility rate is low, and not need other accessory systems or dress It sets；2. cable drum retractable cable mode is efficient, and conveniently；3. device attached power supply function and realize device both direction Long line Telescopic, reduces and changes setting up time.Following embodiment is using single instrument secondary pressurized device as shown in Figure 2.

As shown in figure 3, a kind of list instrument secondary pressurized device, including chamber and two cables inside chamber 7, two switching 4, two selection relay 1 of switch of winding roll；Realize both direction cable Telescopic, a direction Experiment electric current is exported for cable to connect with electric current combining unit, another direction is that cable merges connection with voltage.

Chamber is rod-pulling type aluminum alloy test case, and aluminum alloy test case making precision is higher, and the design size that can coincide reaches Millimeter rank, robustness is higher, heated to be not easy to damage.It is equipped with pull rod, pedestal is furnished with idler wheel, and mobile convenient in carrying is flexible and saves Power.

Coil of cable drum 7 uses synthetic plastic type cable drum, control cable drum insulation resistance to be more than 50 megaohms and (use 500V megohm meter), cable testing line length is up to 30 meters.

Switching switch 4 is handle type change-over switch, including eight pairs of points, each four pairs of normally-open normally-close.

Voltage blocking relay 1 selects integral type intermediate relay, by the way that specified 220V AC voltage is added, can realize Relay right acting, node division are correct.

Alarm 5 selects Buzzing type alarm.In view of long cable accesses the one of convergence control cabinet voltage terminal row or service chamber The plug for needing to be equipped with test wire when secondary pressurized experiment is made in side, needs to be equipped with common cable reel when connecing AC power case That plug.With two kinds of terminal fittings, one kind being used as exchange case wiring, and one kind being used as secondary pressurized access voltage terminal row, choosing With four embedded aviation plugs, fastness is good, not easily broken, and wiring is convenient time saving.

As shown in figure 4, the cable of coil of cable drum is by switching switch selection and power output terminal or secondary pressurized Leading-out terminal connects, and switching cable is connected with external power supply or with the experiment wire terminal for connecting relay protection instrument respectively；Work as volume Drum accesses attaching plug as common power disk used time cut cable, can be inserted into AC power case and takes electricity, when winding roll is as two When the long line of secondary applied voltage test, special experiment wire terminal is can access, when switching switch handle gets to voltage gear, at this point, will be connected in Test wire on relay protection instrument is inserted into the special socket of secondary pressurized of cable drum, and the other end test wire of reel is connected to remittance control On cabinet voltage terminal row, secondary pressurized function is realized, it is external at crossover sub to be when switching switch handle and getting to power supply shelves Attaching plug can access single-phase 220V AC powers, realize power supply function.

Cable constitutes in electric power loop with external power supply and is additionally provided with voltage blocking relay KM1, voltage blocking relay The normally opened contact of device KM1 is connect with switching switch and output voltage terminals, and the coil setting of the voltage blocking relay KM1 exists In the circuit that cable is constituted with external power supply.

If switching switch handle SA is closed in pressurization shelves, at this time SA1, SA3 node, SA2 nodes disconnect, as access 220V When power supply, the KM1 electrifications of voltage blocking relay are attracted, and the normally closed nodes of voltage blocking relay KM1 disconnect at this time, buzzer circuit Conducting, sends out alarm sound.When switching switch handle SA is got to power supply shelves by us, SA1, SA3 node disconnect, and SA2 is closed, report Alert device circuit disconnects, stop alarm.

As shown in figure 5, the operation voltage setting valve of voltage blocking relay KM1 is the 85% of rated voltage, it is 187V.This When operation principle be：When as power supply in use, if switching switch handle pressurization shelves, at this time SA1 nodes be still closed, SA2 nodes disconnect, and L, N-terminal are accessed power supply, KM relays electrification at this time is attracted, and normally closed node KM1 is disconnected, and can thus be kept away Exempt to occur because of the case where maloperation initiation burns out testing equipment.

It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but not to this practicality newly The limitation of type protection domain, those skilled in the art should understand that, based on the technical solution of the present invention, ability Field technique personnel need not make the creative labor the various modifications or changes that can be made still in the protection model of the utility model Within enclosing.

Claims (4)

1. a kind of list instrument secondary pressurized device, is used for substation secondary measure voltage ＆ current, output voltage to voltage merges single Member, output current to electric current combining unit, characterized in that coil of cable drum including chamber and inside chamber is cut Change switch and alarm；The cable of the coil of cable drum is by switching switch selection and power output terminal or secondary pressurized Leading-out terminal connects, and switching cable is connected with external power supply or with the experiment wire terminal for connecting relay protection instrument respectively；Cable Line and external power supply constitute and are additionally provided with voltage blocking relay in electric power loop, the alarm setting cable with it is external In electric power generating composition electric power loop.

2. a kind of single instrument secondary pressurized device as described in claim 1, characterized in that the voltage blocking relay it is normal Contact is opened to connect with switching switch and output voltage terminals, the coil of the voltage blocking relay be arranged cable with it is external In the circuit of electric power generating composition.

3. a kind of single instrument secondary pressurized device as described in claim 1, characterized in that the switching switch includes joint Point SA1：Control cable and secondary pressurized terminal break-make, switching node SA2：Cable and power output terminal break-make are controlled, Switching node SA3：Circuit break-make where controlling alarm；The switching switch selection cable connects with secondary pressurized leading-out terminal When connecing, switching node SA1 is closed with switching node SA3, and switching node SA2 is disconnected；Switching switch selection cable and power supply are defeated When going out terminal connection, switching node SA1 is disconnected with switching node SA3, and switching node SA2 is closed.

4. a kind of single instrument secondary pressurized device as described in claim 1, characterized in that include two cables inside chamber Winding roll, two switching switches, two selection relay；Realize both direction cable Telescopic, a direction is Cable output experiment electric current is connect with electric current combining unit, another direction is that cable merges connection with voltage.