CN-120968870-B - Synchronous noninductive access and exit device and protection control method thereof

CN120968870BCN 120968870 BCN120968870 BCN 120968870BCN-120968870-B

Abstract

The invention discloses a synchronous noninductive access and exit device and a protection control method thereof, belonging to the technical field of alternating current power grids, and the synchronous noninductive access and exit device and the protection control method thereof, wherein the device is a grid-connected and off-grid control power grid consisting of a diesel power generation vehicle, 10kV mains supply, a grid-connected cabinet and a synchronous box; the inside of synchronous case is provided with the foundation frame, fixed mounting has the wiring integrated board on the square underframe, sliding connection has net type balladeur train on the straight post, installs four auxiliary stay subassemblies on the net type balladeur train, has synchronous grid-connected controller on the net type top frame, and auxiliary stay subassembly supports synchronous grid-connected controller, and fixed mounting has two vertical linear modules between square underframe and the net type top frame, and radiating component is installed on the top of net type top frame. The method can realize effective adjustment of the load when the diesel generating vehicle is connected and withdrawn, ensure the electricity safety of residents, and reduce the influence of heat on the working effect of the synchronous grid-connected controller.

Inventors

PENG RONG
Yue Zhengbao
ZOU ZILONG
HUANG JUNJIE
YIN JIAYONG
HUANG CHENGYU
Zhuang Qihang
LUO GUORONG
CHEN DANPING

Assignees

福建中网联合电能科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250820

Claims (10)

1. The synchronous noninductive access and exit device is characterized in that the device is a grid-connected and off-grid control grid consisting of a diesel generator car, 10kV mains supply, a grid-connected cabinet and a synchronous box; The heat dissipation system is characterized in that a base frame (1) is arranged in the synchronous box, the base frame (1) is a frame structure formed by a square bottom frame (101), four straight columns (102) and a grid type top frame (103), a wiring integrated board (2) is fixedly arranged on the square bottom frame (101), the four straight columns (102) form a sliding rail structure, grid type sliding frames (3) are slidably connected on the sliding rail structure, four auxiliary supporting components (4) are arranged on the grid type sliding frames (3), synchronous grid-connected controllers (5) are downwards clamped in the grid type top frame (103) and are locked through bolts, the four auxiliary supporting components (4) respectively support four side faces of the synchronous grid-connected controllers (5), a plurality of data wire bands (6) are connected between the synchronous grid-connected controllers (5) and the wiring integrated board (2), two vertical modules (7) are fixedly arranged between the square bottom frame (101) and the grid type top frame (103), and the two vertical modules (7) are respectively arranged at the positions corresponding to the vertical grid type sliding frames (7) and the top frame (103), and the two vertical modules (7) are respectively arranged at the top ends of the grid type top frame (8); the control part composition in the synchronous box comprises: The synchronous grid-connected control module is positioned in the synchronous grid-connected controller (5) and used as a control center, and is connected with the voltages of the power grid side and the power generation side to monitor and calculate the frequency and the phase difference in real time and judge the synchronization; the intelligent switch module is connected to collect the switch state and control the switch to be opened or closed; Accessing a communication interface module, collecting the firewood state, and controlling the firewood to regulate voltage and frequency; the key display module is accessed, control operation is carried out according to the instruction sent by the key, and the current state is displayed to a user for viewing; The intelligent switch module is connected between the power grid and the power generation side, receives a control instruction of the synchronous grid-connected control module, executes switching operation, has measuring and protecting functions, automatically measures the current running power, judges the load capacity and protects the load capacity based on current; The communication interface module is positioned in the synchronous grid-connected controller (5), receives an interaction command of the synchronous grid-connected controller module, communicates with the firewood, collects firewood running data and controls firewood adjusting frequency and voltage; The key display module is positioned on the outer side surface of the synchronous grid-connected box, realizes one-key control of diesel generation grid connection, grid disconnection and shutdown, and realizes the whole process control through an automatic logic; the synchronous grid-connected control module mainly comprises FIR calculation, abnormal logic judgment, synchronous calculation, diesel generation control and load control.
2. The synchronous noninductive access and exit device according to claim 1, wherein four corners of the grid-type sliding frame (3) are respectively fixed with a spherical sliding block (301), the four spherical sliding blocks (301) respectively slide on corresponding straight columns (102), and the outer side surfaces of the two spherical sliding blocks (301) are respectively fixed with the movable parts of corresponding vertical linear modules (7); The center of the grid-type sliding frame (3) is of a square frame structure, and the square frame structure is in sliding connection with the side face of the synchronous grid-connected controller (5).
3. The synchronous noninductive access and exit device according to claim 2, wherein the four auxiliary supporting components (4) are respectively arranged on four side lines of the square frame structure, the auxiliary supporting components (4) comprise a square base (401), a T-shaped plug-in unit (402) is connected to the square base (401) in a sliding mode, and a plurality of springs (403) are fixedly arranged between one end of the T-shaped plug-in unit (402) and the inner side face of the square base (401).
4. A synchronous noninductive access and exit device as set forth in claim 3, wherein one end of the T-shaped plug-in (402) is provided with an arc-shaped surface structure (4021), and the horizontal projection length value of the arc-shaped surface structure (4021) is larger than the width value of the edge strip of the square frame structure.
5. A synchronous non-inductive access exit device as in claim 3, wherein the spring (403) is always in a compressed state, and the maximum distance between the T-shaped plug-in (402) and the inner side of the rectangular base (401) is smaller than the horizontal projection length of the arc-shaped surface structure (4021).
6. The synchronous noninductive access and exit device according to claim 1 is characterized in that two vertical linear modules (7) are distributed in a central symmetry mode, and the two vertical linear modules (7) are synchronously lifted through program control.
7. The synchronous noninductive access and exit device according to claim 1, wherein the heat dissipation assembly (8) comprises a butting bracket (801), a radiator (802) is fixedly arranged on the butting bracket (801), the radiator (802) is of an integrated structure, and the radiator (802) comprises a heat collection copper plate (8021), a plurality of heat conduction copper pipes (8022), four heat dissipation fins (8023) and four heat dissipation fans (8024); The heat conduction copper pipe (8022) is tightly attached to the upper end face of the synchronous grid-connected controller (5), and the heat dissipation fins (8023) are fixed on the side face of the top end of the butt joint support (801).
8. The synchronous noninductive access and exit device according to claim 7, wherein four sockets (8011) are fixed at the bottom end of the docking bracket (801), and the four sockets (8011) are respectively clamped with the top ends of the grid-type top frames (103) and locked by bolts.
9. The synchronous noninductive access and exit device according to claim 1, wherein four radiating fins (8023) are distributed on four side surfaces of the top end of the butt joint support (801), an air inlet groove (8012) is formed on the top end of the butt joint support (801), air inlets of the four radiating fans (8024) face the air inlet groove (8012), and a dust filtering net (8013) is fixedly arranged on the top end of the air inlet groove (8012) through bolts.
10. The method for protecting and controlling the synchronous noninductive access and exit device according to any one or more of the claims 1-9 is characterized by comprising the following steps of firstly, wiring the whole device, namely connecting a grid-connected cabinet to two sides of a mains switch in advance, disconnecting BWK1 and BWK2, connecting a portable synchronous box to the grid-connected cabinet and a power generation vehicle respectively, and connecting BWK1 and BWK2; step two, switching power supply of the diesel power generation vehicle, entering an overhaul mode, namely, executing synchronous grid-connected logic on the diesel power generation vehicle, automatically adjusting the frequency and voltage of the diesel power generation vehicle, and then switching on; after the closing is confirmed, the commercial power switch is disconnected, at the moment, the diesel generator car singly supplies power to the transformer area, and meanwhile, the commercial power is overhauled; Step three, exiting the overhaul mode, namely when the overhaul mode needs to be exited, executing anti-synchronization logic of the diesel generator car and the mains supply, and switching on the mains supply switch after the synchronization condition is met; And step four, synchronous noninductive access and exit regulation are carried out, namely the output of the diesel generator is reduced, the load is supplied to the power supply by the mains supply, a stop command of the diesel generator is generated after the supply is completed, a switch of the diesel generator is disconnected, and the switch is restored to an initial state.

Description

Synchronous noninductive access and exit device and protection control method thereof Technical Field The invention relates to the technical field of alternating current power grids, in particular to a synchronous noninductive access and exit device and a protection control method thereof. Background With the gradual improvement of the requirements of people on the power supply reliability, the power failure can be avoided when the maintenance is required. Taking a power distribution area as an example, when the conventional maintenance operation is performed, the commercial power switch is required to be disconnected firstly, then the diesel power generator car is closed, and after the maintenance is finished, the diesel power generator car is required to be disconnected firstly, and then the commercial power switch is closed. The process involves two power failures, and the power failure time is short, but the life quality of residents and the power supply quality requirements of power grid companies are affected. The prior art provides a device and a corresponding method for synchronously connecting the diesel power generation vehicle, and the general idea is that the diesel power generation vehicle is firstly connected through synchronous connection and then disconnected with the mains supply when overhauling, and the diesel power generation vehicle is also connected through reverse synchronous connection and then disconnected after overhauling. This method can realize uninterrupted operation, but is insufficient in terms of the following: 1) When the diesel generator car is switched from the grid connection mode to the off-grid mode or the diesel generator car is separated to be withdrawn to run, the power output change is possibly abnormal due to abrupt change of the load; 2) During off-grid operation, the diesel generator car supplies power to the whole platform area, and voltage and frequency instability can be caused due to lack of support of a power grid, so that the residential electricity safety is influenced; 3) When the synchronous noninductive access and exit device works, the synchronous grid-connected logic and the anti-synchronous logic are required to be frequently executed and are controlled by the synchronous grid-connected controller in the synchronous box, the heat dissipation efficiency of the traditional heat dissipation mode is low, and the working effect of the synchronous grid-connected controller can be influenced by a high-temperature environment. Therefore, the invention designs a synchronous noninductive access and exit device and a protection control method thereof so as to achieve the aim of having more practical value. Disclosure of Invention 1. Technical problem to be solved Aiming at the problems existing in the prior art, the invention aims to provide a synchronous noninductive access and exit device and a protection control method thereof, which can realize effective adjustment of load when a diesel power generation vehicle accesses and exits, avoid the condition of too fast output change, ensure the normal operation of the noninductive access and exit of the diesel power generation vehicle, avoid the condition of unstable voltage and frequency, ensure the electricity utilization safety of residents, effectively improve the heat dissipation efficiency of a synchronous grid-connected controller, avoid the high-temperature environment generated by heat accumulation of the synchronous grid-connected controller, and reduce the influence of heat on the working effect of the synchronous grid-connected controller. 2. Technical proposal In order to solve the problems, the invention adopts the following technical scheme. The synchronous noninductive access and exit device is a grid-connected and off-grid control power grid consisting of a diesel power generation vehicle, 10kV mains supply, a grid-connected cabinet and a synchronous box; The inside of synchronous case is provided with the foundation frame, the foundation frame is the frame construction of constituteing by square underframe, four straight posts and a net type roof frame, fixed mounting has the wiring integrated circuit board on the square underframe, four the straight post slide rail structure to sliding connection has net type balladeur train on the slide rail structure, install four auxiliary support components on the net type balladeur train, the downcard has synchronous grid-connected controller on the net type roof frame to through the bolt locking, four auxiliary support components form the support to four sides of synchronous grid-connected controller respectively, be connected with a plurality of data line area between synchronous grid-connected controller and the wiring integrated circuit board, two vertical linear modules are fixed with the movable part of corresponding vertical linear module respectively to a set of diagonal position of net type balladeur train, radiator unit is installed on the top of