CN214953730U

CN214953730U - Excitation system rotor current acquisition device

Info

Publication number: CN214953730U
Application number: CN202120620347.1U
Authority: CN
Inventors: 刘云龙; 任宗杰; 刘秋生; 李济身; 李致成
Original assignee: Hulunbeier Antai Thermal Power Co ltd Manzhouli Thermal Power Plant
Current assignee: Hulunbeier Antai Thermal Power Co ltd Manzhouli Thermal Power Plant
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-11-30
Anticipated expiration: 2031-03-26

Abstract

Excitation system rotor current collection system. Only one rotor current acquisition module is used, one path of input is used, two paths of output are used, and when the rotor current modules are damaged, the A, B sleeve excitation regulators cannot acquire rotor currents and cannot perform reactive power regulation. The utility model discloses the constitution includes: shunt (1), two rotor current collectors (3) and two excitation regulators (4), the shunt draw forth three routes lead-out wire, wherein two are connected single-operation circuit (2) respectively and are connected to rotor current collector on, another lead-out wire connects to respectively after through change over switch (8) rotor current collector on, two rotor current collector and two excitation regulators one-to-one connect. The utility model is used for excitation system rotor current gathers.

Description

Excitation system rotor current acquisition device

Technical Field

The utility model relates to an excitation system rotor current collection system.

Background

The excitation regulator has A, B sets, the excitation regulator adjusts by tracking the current change of the generator rotor under the condition of manual operation, the current of the generator rotor is taken from a shunt in a rectification and demagnetization cabinet and is transmitted to the A, B sets of excitation regulators through a rotor current module, only one rotor current acquisition module is arranged in a regulation screen, one rotor current is input, two rotor currents are output, when the rotor current module is damaged, the A, B sets of excitation regulators cannot acquire the rotor current, reactive regulation cannot be carried out, and the safe operation of a unit is endangered.

Disclosure of Invention

The utility model aims at providing an excitation system rotor current collection system.

The above purpose is realized by the following technical scheme:

the utility model provides an excitation system rotor current collection system, excitation system rotor current collection system include shunt, two rotor current collectors and two excitation regulators, the shunt draw forth three routes lead-out wire, wherein two are connected single-operation circuit respectively and are connected to rotor current collector on, another lead-out wire connects respectively to after through change over switch rotor current collector on, two rotor current collectors and two excitation regulators one-to-one connect.

And the two paths of single-operation circuits form an interlocking circuit.

Has the advantages that:

1. the utility model discloses a two rotor current collectors, two rotor current collectors and two excitation regulator one-to-ones can guarantee that another rotor current collector in time switches the operation when one of them rotor current collector trouble does not operate.

2. The utility model discloses set up separately two kinds of operation modes of single operation and dual operation, when selecting dual operation mode, can make two rotor current collectors and two excitation regulators simultaneous workings for rotor current collector guarantees to gather the electric current of shunt and with its signal transmission to excitation regulator always.

Description of the drawings:

FIG. 1 is a schematic structural diagram of the present invention;

in the figure: 1. a flow divider; 2. a single-run circuit; 3. a rotor current collector; 4. an excitation regulator; 5. a normally closed contact; 6. a relay coil; 7. a knife switch; 8. a switch; 9. and (6) leading out points.

The specific implementation mode is as follows:

example 1:

the utility model provides an excitation system rotor current collection system, excitation system rotor current collection system include shunt 1, two rotor current collectors 3 and two excitation regulator 4, the shunt draw forth three routes lead-out wire, wherein two are connected single-operation circuit 2 respectively and are connected to rotor current collector on, another lead-out wire connects to respectively after through change over switch 8 rotor current collector on, two rotor current collector and two excitation regulator one-to-one connect.

Example 2:

according to the excitation system rotor current acquisition device in embodiment 1, the two single-operation circuits form an interlocking circuit.

The working principle is as follows: the specific structure of the two-way single-operation circuit forming the interlocking circuit is as follows: as shown in fig. 1, the left single-operation circuit is connected with the normally closed contacts of the KM1 and the right single-operation circuit KM2, the right single-operation circuit is connected with the normally closed contacts of the KM2 and the left single-operation circuit KM1, and the two circuits form an interlocking circuit to realize single operation;

when a double-operation mode is selected, knife switch of two single-operation circuits are opened to disconnect the circuits, a change-over switch is closed, a shunt is respectively and electrically connected with two rotor current collectors after the double-operation mode is closed to simultaneously collect rotor current information, each rotor current collector transmits collected signals to a corresponding excitation regulator, the collected signals can be used for comparison of collected currents, when the single-operation mode is required, the change-over switch is opened, the knife switch of one single-operation circuit is firstly closed, for example, the knife switch of a left single-operation circuit and the knife switch of the left single-operation circuit operate, the current is collected by independently operating the left rotor current collector and the excitation regulator on the left side, then the knife switch of the other single-operation circuit is closed, a KM1 coil is electrified, a normally closed contact of KM1 is disconnected, the right single-operation circuit is disconnected, when the left rotor current collector fails to work, when the KM1 coil is switched off, the normally closed contact of the KM1 is closed, the right single-operation circuit is electrified to operate, and the normally closed contact of the left single-operation circuit KM2 is switched off to operate the right single-operation circuit.

Claims

1. The utility model provides an excitation system rotor current collection system which characterized by: the excitation system rotor current acquisition device comprises a shunt, two rotor current collectors and two excitation regulators, wherein the shunt leads out three outgoing lines, two outgoing lines are respectively connected with a single-operation circuit and connected to the rotor current collectors, the other outgoing line is respectively connected to the rotor current collectors after passing through a change-over switch, and the two rotor current collectors are connected with the two excitation regulators in a one-to-one correspondence mode.

2. The excitation system rotor current collecting device according to claim 1, wherein: the two single-operation circuits form an interlocking circuit.