CN205562681U - Automatic nuclear phase device - Google Patents

Abstract

This application relates to an automatic phase verification device, which includes a box body. On both sides of the box body, there are bus I three-phase terminals for introducing three-phase voltage at bus I and bus II for introducing three-phase voltage at bus II. Three-phase terminals; bus I three-phase terminals and bus II three-phase terminals are connected to the master control measurement module circuit arranged in the box to measure the aforementioned two-three-phase voltage amplitude or difference; in the master control measurement module The power failure relays SYJ1 and SYJ2 are connected in parallel to the side circuit, and the disconnection alarm circuit is connected behind the power failure relays SYJ1 and SYJ2. On the master control measurement module side, there are parallel voltage relays YJ1, YJ2 and YJ3, voltage relays YJ1, YJ2 and YJ3 are followed by phase warning lights (UA, UB, UC) corresponding to the three-phase terminal of bus I and the three-phase terminal of bus II. This application can detect whether the phase of the voltage circuit is correct in one measurement, which reduces the number of operations and work flow of the measurement, and reduces the risk of accidentally touching other secondary circuits.

Description

Automatic nuclear phase device

technical field

This application relates to an automatic phase verification device used in substations for detecting secondary circuits.

Background technique

With the steady advancement of the State Grid Corporation's strategic goal of building "one strong and three excellent" smart grids, a large number of substations that have been put into operation for a long time and have aging equipment are in urgent need of renovation. If the transformation of the voltage circuit is involved, the nuclear phase work of the voltage secondary circuit must be carried out during the power transmission process. However, when using the traditional method for phase verification, it is necessary to use a voltmeter to measure each phase of the voltage secondary circuit. There are many cables in the protective screen, and the wiring of the secondary circuit is complicated. The traditional method of phase verification requires a lot of work, the work process is complicated, and there is a risk of accidentally touching other secondary circuits and measuring errors. If the voltage secondary circuit is accidentally short-circuited, there will be a risk of misoperation of the backup automatic switch-on device or burning of the voltage transformer, which will cause huge losses to the power grid and equipment. When an abnormal condition occurs in the transformed voltage circuit, the maintenance personnel need to check each phase of the voltage secondary circuit to determine the cause of the abnormality of the voltage circuit, which virtually increases the time for the maintenance personnel to deal with the fault and reduces the maintenance personnel's time. work efficiency. Therefore, it is imminent to develop a nuclear phase device that can reduce the nuclear phase workflow and reduce work risk.

Contents of the invention

The purpose of this application is to provide an automatic phase verification device that can quickly detect the voltage secondary circuit in the substation.

The purpose of this application is achieved in this way: the automatic phase verification device includes a box, and the bus I three-phase terminal for introducing the three-phase voltage at the bus I and the three-phase terminal for introducing the three-phase voltage at the bus II are respectively arranged on both sides of the box. The busbar II three-phase terminal of the voltage; the busbar I three-phase terminal and the busbar II three-phase terminal are connected to the master control measurement module circuit arranged in the box to measure the aforementioned two-three-phase voltage amplitude or difference; There are parallel power-off relays SYJ1 and SYJ2 connected to the circuit on the side of the master control measurement module, and connected to a disconnection alarm circuit behind the power-off relays SYJ1 and SYJ2, and there are parallel voltage relays YJ1, YJ2 and YJ3 connected to the circuit on the side of the master control measurement module. The voltage relays YJ1, YJ2, and YJ3 are followed by phase warning lights (UA, UB, UC) corresponding to the three-phase terminals of the busbar I and the three-phase terminals of the busbar II.

Due to the implementation of the above technical solution, the application is simple to operate and has a high degree of intelligence. It can detect whether the phase of the voltage circuit is correct in one measurement, which reduces the number of operations and work processes for measuring the secondary circuit of the voltage, and reduces accidental touches caused by human factors. Other secondary circuit risks. If an abnormal condition of the voltage circuit is encountered during the power transmission process, the maintenance personnel can quickly judge the abnormal condition of the voltage circuit through the indicator lights and alarm signals with different meanings on the automatic phase verification device. In substations that meet the comprehensive automation functions, the automatic phase verification device can be fixed in the protection room, and the alarm signal of the device can be connected to the measurement and control device for remote real-time monitoring. The use of the automatic phase verification device greatly reduces the time for maintenance personnel to deal with faults, reduces the labor intensity of maintenance personnel, saves the production cost of the enterprise, and improves the economic benefits of the enterprise.

Description of drawings: the technical scheme of the present application is given by the following drawings and examples:

Fig. 1 is the schematic diagram of the application circuit;

Fig. 2 is the application circuit diagram;

Fig. 3 is a schematic diagram of the external structure of the present application;

Fig. 4 is the disconnection alarm circuit of the present application;

Figure 5 is the phase alarm circuit of this application.

Legend: 1. Bus I three-phase terminal, 2. Bus I voltage loss warning light; 3. Voltage loss display, 4. Phase display, 5. Bus II voltage loss warning light, 6. Phase warning light, 7. Bus II three-phase terminal.

detailed description:

The present application is not limited by the following examples, and specific implementation manners can be determined according to the technical solutions of the present application and actual conditions.

Embodiment: As shown in Figure 1-5, the automatic phase verification device includes a box body, and the bus I three-phase terminal 1 for introducing the three-phase voltage at the bus I and the three-phase terminal 1 for introducing the bus II at the two sides of the box are respectively arranged. Three-phase bus II three-phase terminal 7 of three-phase voltage; bus I three-phase terminal 1 and bus II three-phase terminal 7 are arranged in the box to measure the total control measurement of the aforementioned two-three-phase voltage amplitude or difference The modules are connected to the circuit; there are parallel power-off relays SYJ1 and SYJ2 connected to the circuit on the side of the master control measurement module, and the disconnection alarm circuit is connected behind the power-off relays SYJ1 and SYJ2, and a parallel voltage relay YJ1 is also connected to the circuit on the side of the master control measurement module , YJ2, YJ3, voltage relays YJ1, YJ2, YJ3 are followed by phase warning lights 6 (UA, UB, UC) corresponding to bus I three-phase terminal 1 and bus II three-phase terminal 7.

The three-phase terminal 1 of the busbar I includes three plugs Ua, Ub, and Uc, and the three plugs of Ua, Ub, and Uc are in one-to-one correspondence with the three-phase voltages introduced by the busbar I; The terminal 7 includes three plugs Ua', Ub' and Uc', and the three plugs Ua', Ub' and Uc' respectively correspond to each phase of the three-phase voltage introduced by the bus II.

The power-off relay SYJ1 includes parallel contacts SYJ1-1, SYJ1-2, and SYJ1-3. After the contacts SYJ1-1, SYJ1-2, and SYJ1-3, there are three contacts connected in series with Ua, Ub, and Uc respectively. Each plug corresponds to the bus I voltage loss warning light 2 one by one.

The power-off relay SYJ2 includes parallel contacts SYJ2-1, SYJ2-2, and SYJ2-3. After the contacts SYJ2-1, SYJ2-2, and SYJ2-3, Ua', Ub', The three plugs of Uc' correspond one-to-one to the bus II voltage loss warning light 5 .

A voltage loss display screen 3 connected to the master control measurement module circuit is arranged on the surface of the box body, and the voltage loss display screen 3 is used to display the voltage amplitude of the three-phase voltage fault phase.

A phase display screen 4 connected with the general control measurement module circuit is also arranged on the surface of the box body, and the phase display screen 4 is used to display the voltage difference of the fault phase of the three-phase voltage.

The master control and measurement module refers to a single-chip microcomputer preset with a program, and its specific structure is not the point of the invention of this application, and the specific structure will not be described in detail. The corresponding standard voltage amplitude is preset in the program.

Determine whether the voltage amplitude of each phase is correct. After the three-phase voltage introduced at the busbar I and II enters the loss-of-voltage relay SYJ1 and the loss-of-voltage relay SYJ2 through the three-phase terminal 1 of the busbar I and the three-phase terminal 7 of the busbar II respectively, when a certain phase occurs PT disconnection or voltage two In the case of poor contact of the secondary circuit, etc., when the measured voltage amplitude of the phase is lower than the standard voltage amplitude set by the program, the voltage loss relay SYJ1 or SYJ2 will act to drive the contact of the faulty phase, and the disconnection alarm circuit will be turned on. The loss-of-voltage alarm light is on, indicating that the voltage amplitude of the phase is abnormal; when the measured voltage amplitude is correct and greater than the standard voltage amplitude set by the program, the loss-of-voltage relay SYJ1 or SYJ2 will not act, and the corresponding loss-of-voltage alarm will If the light is off, it means that the phase voltage amplitude is correct.

Determine whether the phase of each phase voltage is correct. After the I and II bus voltages enter the master control measurement module ZK from the bus I three-phase terminal 1 and the bus II three-phase terminal 7 respectively, when the voltage difference of a certain phase of the measured voltage is greater than the standard voltage amplitude set by the program value, the master control measurement module ZK sends an action command to the voltage relay of the corresponding phase, the voltage relay acts, drives the contact action of the voltage relay of the faulty phase, the phase alarm circuit is turned on, and the corresponding phase alarm light is on, indicating that the The voltage phase is abnormal, and the master control measurement module displays the fault phase voltage difference; when the voltage difference input to the master control measurement module ZK is less than the standard voltage amplitude set by the program, the master control measurement module ZK does not act, and the corresponding The phase warning light is off, indicating that the phase voltage phase is correct, and the master control measurement module shows that the phase voltage difference is about 0.

The above technical features constitute the best embodiment of this application, which has strong adaptability and best implementation effect, and non-essential technical features can be added or subtracted according to actual needs to meet the needs of different situations.

Claims (7)

1. An automatic phase verification device, comprising a box body, busbar I three-phase terminals for introducing three-phase voltage at busbar I place and busbar II three-phase terminal for introducing three-phase voltage at busbar II place are respectively arranged on both sides of the box body The phase terminal is characterized in that: the three-phase terminal of the busbar I and the three-phase terminal of the busbar II are connected to the master control measurement module circuit arranged in the box to measure the amplitude or difference of the aforementioned two or three phase voltages; There are parallel power-off relays SYJ1 and SYJ2 connected to the circuit on the side of the control and measurement module. After the power-off relays SYJ1 and SYJ2, they are connected to a disconnection alarm circuit. Relays YJ1, YJ2, and YJ3 are followed by phase warning lights (UA, UB, UC) corresponding to the three-phase terminal of bus I and the three-phase terminal of bus II. 2. automatic phase checking device as claimed in claim 1, is characterized in that: described bus bar I three-phase connection terminal comprises three plugs of Ua, Ub, Uc, and three plugs of Ua, Ub, Uc are respectively connected with being introduced by bus bar I Each phase of the three-phase voltage has a one-to-one correspondence. 3. The automatic phase verification device according to claim 1, characterized in that: the three-phase terminals of the busbar II include three plugs Ua', Ub' and Uc', and three plugs of Ua', Ub' and Uc' The plugs are in one-to-one correspondence with each phase of the three-phase voltage introduced by the bus II. 4. The automatic phase verification device according to claim 2, characterized in that: the power failure relay SYJ1 includes parallel contacts SYJ1-1, SYJ1-2, and SYJ1-3, and the contacts SYJ1-1, SYJ1-3 After SYJ1-2 and SYJ1-3, there are bus I voltage loss warning lights corresponding to the three plugs Ua, Ub and Uc in series respectively. 5. The automatic phase verification device according to claim 3, characterized in that: said power-off relay SYJ2 comprises parallel contacts SYJ2-1, SYJ2-2, SYJ2-3, between said contacts SYJ2-1, After SYJ2-2 and SYJ2-3, there are three busbar II voltage loss warning lights corresponding to the three plugs Ua', Ub' and Uc' in series respectively. 6. The automatic phase verification device according to claim 1, characterized in that: a voltage loss display screen connected to the master control measurement module circuit for displaying the voltage amplitude of the three-phase voltage fault phase is arranged on the surface of the box body. 7. The automatic phase verification device according to claim 1, characterized in that: a phase display screen connected to the master control measurement module circuit for displaying the voltage difference of the three-phase voltage fault phase is also provided on the surface of the box body.