CN106059068A - Architecture of inner bridge connection type intelligent substation process layer - Google Patents

Abstract

The invention provides a process layer framework of an inner-bridge type intelligent substation, including: an incoming line information collection control device, an inner bridge connection information collection control device, and a main transformer high backup protection device. The incoming line information acquisition control device is used to collect the current information on each incoming line interval and transmit it to the main transformer high backup protection device. The inner bridge wiring information acquisition control device is used to collect the current information on each inner bridge wiring interval and transmit it to the main transformer high backup protection device. The main transformer body information collection control device is used to collect the current information of the neutral point of the main transformer and transmit it to the high backup protection of the main transformer. That is to say, the judgment basis of the main transformer high backup protection device in the present invention is the incoming line current, the sum current of the inner bridge wiring current and the sum current of the neutral point of the main transformer. Therefore, even if the main transformer differential protection is out of service or overhauled, Grid equipment can also operate safely under the protection of the main transformer high backup protection device.

Description

A Process Layer Architecture of Inner-Bridge Wiring Smart Substation

technical field

The invention relates to the technical field of intelligent substations, in particular to a structure of a process layer of an inner-bridge type intelligent substation.

Background technique

As an important link in the construction of smart grid, the project of smart substation adopts a staged and layered technical plan to be gradually implemented. The system structure of intelligent substation can be divided into three layers, namely station control layer, interval layer and process layer. The equipment at the process layer includes primary intelligent equipment, merging units and intelligent terminals, etc., which are used to complete the power distribution, transformation, transmission and measurement, control, metering, status monitoring and other related functions of the intelligent substation.

The inner bridge connection type is a connection method commonly used in smart substations. The high backup protection of the main transformer under this connection method is an important supplement to the differential protection of the main transformer. The role of transformers and related lines and electrical equipment. However, in the process layer of the current inner bridge-connected smart substation, the high backup protection of the main transformer mainly uses the current at the high voltage side of the main transformer as the basis for judgment. When the dynamic protection refuses to operate, the relevant circuit breaker will be tripped, so as to ensure the safe and stable operation of the power grid. However, the judgment basis of the main transformer differential protection is the sum of the incoming line current and the inner bridge wiring current, while the judgment basis of the main transformer high backup protection is only the main transformer high voltage side current. The protection range of the main transformer high backup protection is much smaller than the protection range of the main transformer differential protection. Once the main transformer differential protection is shut down or overhauled, it will cause some power grid equipment (that is, the protection range of the main transformer high backup protection) Power grid equipment) unprotected operation, which will seriously affect the security of the power system.

Contents of the invention

Therefore, the technical problem to be solved by the present invention is to overcome the protection range of the high backup protection of the main transformer in the process layer of the inner bridge-connected smart substation in the prior art is much smaller than the protection range of the differential protection of the main transformer. Once the differential protection of the main transformer During outage or maintenance, it will lead to the defect of unprotected operation of some grid equipment, so as to provide a process layer architecture of inner bridge connection smart substation that can increase the protection range of the main transformer high backup protection.

For this reason, the present invention provides following technical scheme:

The present invention provides a framework for the process layer of an inner-bridge type intelligent substation, including: an incoming line information acquisition control device, an inner bridge wiring information acquisition control device, a main transformer body information acquisition control device, and a main transformer high backup protection device;

The incoming line information acquisition control device is used to collect the current information on each incoming line interval and transmit it to the main transformer high backup protection device;

The inner bridge wiring information acquisition control device is used to collect the current information on each inner bridge wiring interval and transmit it to the main transformer high backup protection device;

The main transformer body information acquisition control device is used to collect the current information of the neutral point of the main transformer and transmit it to the main transformer high backup protection device;

The main transformer high backup protection device is used to receive the current information on each of the incoming line intervals, the current information on each inner bridge line interval and the current information on the neutral point of the main transformer As a basis for judgment, the main transformer is provided with high backup protection for the main transformer.

In the structure of the process layer of the inner bridge-connected intelligent substation described in the present invention, the incoming line information collection and control device is also used to collect the position information of all circuit breakers and isolating switches on each incoming line interval and transmit it to the remote The control center controls all circuit breakers and isolating switches on the incoming line interval according to the received first control signal fed back by the remote control center;

The inner bridge connection information acquisition control device is also used to collect the position information of all circuit breakers and isolating switches on each inner bridge connection interval and transmit it to the remote control center, and feedback from the remote control center according to the received information. The second control signal controls all circuit breakers and isolating switches on the inner bridge wiring compartment;

The main transformer body information collection and control device is also used to collect the position information of the isolating switch at the neutral point of the main transformer and transmit it to the remote control center, and control according to the third control signal fed back by the remote control center The isolating switch of the neutral point of the main transformer.

In the structure of the process layer of the inner-bridge wired intelligent substation described in the present invention, the incoming line information collection and control device includes an incoming line merging unit and an incoming line combining intelligence unit;

The incoming line merging unit device is used to collect partial current information on each of the incoming line intervals;

The integrated unit for incoming line integration and intelligence is used to collect the position information of all circuit breakers and isolating switches on each incoming line interval and the current information of the remaining part of each incoming line interval, and according to The received first control signal controls all circuit breakers and isolating switches on the incoming line bay.

In the framework of the process layer of the inner-bridge type intelligent substation described in the present invention, the inner-bridge connection information collection and control device includes a bridge merging unit and a bridge-intelligence integration unit;

The bridge merging unit is configured to collect partial current information on each of the inner bridge line intervals;

The bridge-intelligence integrated unit is used to collect the position information of all circuit breakers and isolating switches on each inner bridge wire interval and the current information of the remaining parts on each inner bridge wire interval, and according to The received second control signal controls all circuit breakers and disconnectors on the inner bridge wire bay.

In the structure of the process layer of the inner-bridge wiring type intelligent substation described in the present invention, the main transformer body information collection and control device includes a main transformer body merging unit and a main transformer body intelligent terminal;

The merging unit of the main transformer body is used to collect the current information of the neutral point of the main transformer;

The intelligent terminal of the main transformer body is used to collect the position information of the isolating switch of the neutral point of the main transformer, and control the isolating switch of the neutral point of the main transformer according to the received third control signal.

The structure of the process layer of the inner-bridge wired intelligent substation according to the present invention also includes: a main transformer body protection device;

The intelligent terminal of the main transformer body is also used to collect the body information of the main transformer;

The main transformer body protection device is used to use the received main transformer body information as a judgment basis, and provide main transformer body protection for the main transformer accordingly.

In the structure of the process layer of the inner-bridge connected intelligent substation according to the present invention, the main transformer body protection device is integrated in the main transformer body intelligent terminal.

The structure of the process layer of the inner-bridge wired intelligent substation according to the present invention also includes: a low-voltage incoming line information acquisition control device and a main transformer low-voltage backup protection device;

The low-voltage incoming line information acquisition control device is used to collect the current information on the line interval of each main transformer low-voltage side incoming line and transmit it to the main transformer low backup protection device;

The main transformer low-voltage backup protection device is used to use the received current information on the incoming line interval at the low-voltage side of the main transformer as a judgment basis, and accordingly provide main transformer low-voltage backup protection for the main transformer.

In the structure of the process layer of the inner-bridge type smart substation described in the present invention, the low-voltage incoming line information acquisition control device is also used to collect the position information of all circuit breakers and isolating switches on the line interval of each main transformer low-voltage side incoming line and transmitted to the remote control center, and control all circuit breakers and isolating switches on the incoming line bays on the low-voltage side of each main transformer according to the received fourth control signal fed back from the remote control center.

In the structure of the process layer of the inner-bridge wiring type intelligent substation according to the present invention, the low-voltage incoming line information collection and control device includes a low-voltage incoming line merging unit and a low-voltage incoming line integration unit;

The low-voltage incoming line merging unit is used to collect part of the current information on the line interval of the incoming line at the low-voltage side of each of the main transformers;

The low-voltage incoming line and intelligent integration unit is used to collect the position information of all circuit breakers and isolating switches on the incoming line interval on the low-voltage side of each main transformer and the interval between incoming lines on the low-voltage side of each main transformer. and control all circuit breakers and isolating switches on the incoming line bays on the low-voltage side of each main transformer according to the received third control signal.

The technical solution of the present invention has the following advantages:

The invention provides a process layer framework of an inner-bridge type intelligent substation, including: an incoming line information collection control device, an inner bridge connection information collection control device, and a main transformer high backup protection device. The incoming line information acquisition control device is used to collect the current information on each incoming line interval and transmit it to the main transformer high backup protection device. The inner bridge wiring information acquisition control device is used to collect the current information on each inner bridge wiring interval and transmit it to the main transformer high backup protection device. The main transformer body information collection control device is used to collect the current information of the neutral point of the main transformer and transmit it to the high backup protection of the main transformer. That is to say, the judgment basis of the main transformer high backup protection device in the present invention is the incoming line current, the sum current of the inner bridge wiring current and the current of the neutral point of the main transformer. The equipment can also operate safely under the protection of the main variable height backup protection device.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

Fig. 1 is a structural block diagram of a specific example of the framework of the process layer of the internal bridge-connected intelligent substation in the embodiment of the present invention;

Fig. 2 is a schematic circuit diagram of a specific example of the structure of the process layer of the inner-bridge type intelligent substation in the embodiment of the present invention.

Reference signs:

1-Incoming line information collection and control device; 2-Inner bridge wiring information collection and control device; 3-Main transformer body information collection and control device; 4-Main transformer high backup protection device; 5-Main transformer body protection device; 6-Low voltage inlet Line information collection and control device; 7-main transformer low backup protection device; 11-incoming line merging unit; 12-incoming line integration and intelligence integration unit; 21-bridge integration unit; Transformer body merging unit; 32- main transformer body intelligent unit; 61- low-voltage incoming line merging unit; 62- low-voltage incoming line combined intelligence unit.

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically or electrically connected; it can be directly connected, or indirectly connected through an intermediary, or it can be the internal communication of two components, which can be wireless or wired connect. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.

Example

This embodiment provides a process layer architecture of an inner-bridge type intelligent substation, as shown in Figure 1, including: an incoming line information acquisition control device 1, an inner bridge connection information acquisition control device 2, and a main transformer body information acquisition control device 3 and the main variable height backup protection device 4.

The incoming line information acquisition control device 1 is used to collect the current information on each incoming line interval and transmit it to the main transformer high backup protection device 4 .

The inner bridge wiring information acquisition control device 2 is used to collect the current information on each inner bridge wiring interval and transmit it to the main transformer high backup protection device 4 .

The main transformer body information acquisition control device 3 is used to collect the current information of the neutral point of the main transformer and transmit it to the main transformer high backup protection device 4 .

The main transformer high backup protection device 4 is used to use the received current information on each incoming line interval, the current information on each inner bridge wiring interval and the current information on the neutral point of the main transformer as a basis for judgment, and accordingly The main transformer provides high backup protection for the main transformer. Specifically, the main transformer high backup protection device 4 can add the current information on the incoming line interval, the current information on the inner bridge wire interval, and the current information of the neutral point of the main transformer together as the main transformer high backup protection device 4. Judgments based. The specific judgment process is as follows:

$\stackrel{<span\; class="notranslate">\; \&Right\; Arrow;</span>}{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; =</span>\stackrel{<span\; class="notranslate">\; \&Right\; Arrow;</span>}{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; a</span>}}}<span\; class="notranslate">\; +</span>\stackrel{<span\; class="notranslate">\; \&Right\; Arrow;</span>}{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}}$

$\stackrel{<span\; class="notranslate">\; \&Right\; Arrow;</span>}{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; =</span>\stackrel{<span\; class="notranslate">\; \&Right\; Arrow;</span>}{{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}$

in, is the current on each incoming line interval collected by the incoming line information acquisition control device 1, is the current on each inner bridge wire interval collected by the inner bridge wire information acquisition control device 2, The current of the neutral point of the main transformer collected by the main transformer body information collection control device 3 . when or , the main transformer high backup protection device 4 operates to provide main transformer high backup protection for the main transformer, where I _y1 is the judgment threshold of high backup positive sequence current, and I _y2 is the judgment threshold of high backup zero sequence current. It can be seen that regardless of the incoming line side, the inner bridge connection or the neutral point connection of the main transformer, any fault in the power grid equipment, such as a short circuit, will cause the current to increase, that is, the sum of the current exceeds the high backup positive sequence current judgment threshold or If the neutral point current of the main transformer exceeds the high backup zero-sequence current judgment threshold, the main transformer high backup protection device 4 can judge that a fault has occurred, and control the circuit breaker in the main transformer high backup protection to trip when the fault occurs, and The transformer provides high backup protection for the main transformer.

In this embodiment, the judging basis of the structure of the process layer of the inner bridge-connected smart substation is the incoming line current, the sum of the inner bridge connection current and the current at the neutral point of the main transformer. Therefore, even if the main transformer differential protection is out of service or overhaul At the same time, the power grid equipment can also operate safely under the protection of the main transformer high backup protection device.

Preferably, in the structure of the process layer of the inner bridge-connected intelligent substation in this embodiment, the incoming line information acquisition control device 1 is also used to collect and transmit the position information of all circuit breakers and disconnectors on each incoming line interval To the remote control center, according to the received first control signal fed back by the remote control center to control all circuit breakers and isolating switches on the incoming line bay.

The inner bridge wiring information acquisition control device 2 is also used to collect the position information of all circuit breakers and isolating switches on each inner bridge wiring interval and transmit it to the remote control center, according to the received second control signal fed back by the remote control center Control all circuit breakers and isolating switches on the inner bridge wiring bay.

The main transformer body information acquisition control device 3 is also used to collect the position information of the isolating switch of the neutral point of the main transformer and transmit it to the remote control center, and control the isolation of the neutral point of the main transformer according to the third control signal fed back by the remote control center switch. Specifically, the remote control center can receive the position information of all circuit breakers and isolating switches on each incoming line bay, the position information of all circuit breakers and isolating switches on each inner bridge wiring bay, and the transformer neutral point The position information of the isolating switch, according to the operation control requirements of the power grid, sends the first control signal, the second control signal and the third control signal to the incoming line information collection and control device 1, the inner bridge wiring information collection and control device 2 and the main transformer body information The acquisition and control device 3 controls the corresponding circuit breaker and isolating switch, and realizes the remote control function of the incoming line terminal, the inner bridge terminal and the main transformer.

Preferably, as shown in FIG. 2 , in the structure of the process layer of the inner-bridge type intelligent substation in this embodiment, the incoming line information collection and control device 1 further includes an incoming line merging unit 11 and an incoming line integration unit 12 .

The incoming line merging unit device 11 is used to collect partial current information on each incoming line interval. Specifically, any existing merging unit can be selected as the incoming line merging unit device 11 to realize the above functions.

The incoming line integration unit 12 is used to collect the position information of all circuit breakers and isolating switches on each incoming line interval and the current information of the remaining part on each incoming line interval, and according to the received first The control signal controls all circuit breakers and isolating switches on the incoming line bay. Specifically, any existing integrated intelligent device (integrated device of a merging unit and an intelligent terminal) can be selected as the incoming intelligent integrated unit 12 to realize the above-mentioned functions. In addition, because the cost of the merging unit is much lower than that of the integrated device, it is only necessary to install the merging unit for the incoming line that only needs to collect current without corresponding control, and for the part that needs to be controlled, For example, including the circuit breaker and isolating switch part, it is necessary to install a smart integrated device to collect the position information of the circuit breaker and isolating switch and the current of the remaining part, and control the circuit breaker and isolating switch according to the corresponding control signal fed back from the remote control center.

In the structure of the process layer of the inner-bridge type smart substation in this embodiment, by selecting the incoming line merging unit 11 and the incoming line integration unit 12 to realize corresponding functions such as collection and remote control, the equipment in the smart substation is greatly reduced Quantity saves space.

Preferably, in the structure of the process layer of the inner-bridge type smart substation in this embodiment, the inner-bridge information collection control device 2 further includes a bridge merging unit 21 and a bridge-intelligence integration unit 22 .

The bridge merging unit 21 is configured to collect partial current information on each inner bridge line interval.

The bridge and intelligence integration unit 22 is used to collect the position information of all circuit breakers and isolating switches on each inner bridge line interval and the current information of the remaining part on each inner bridge line interval, and according to the received second The control signal controls all circuit breakers and isolating switches on the inner bridge wiring bay.

In the structure of the process layer of the internal bridge-connected smart substation in this embodiment, by selecting the bridge merging unit 21 and the bridge-intelligent integration unit 22 to realize corresponding functions such as collection and remote control, the number of devices in the smart substation is greatly reduced. Saves space.

Preferably, in the framework of the process layer of the inner-bridge connected intelligent substation in this embodiment, the main transformer body information acquisition control device 3 further includes a main transformer body merging unit 31 and a main transformer body intelligent terminal 32 .

The main transformer main body merging unit 31 is used to collect the current information of the neutral point of the main transformer.

The intelligent terminal 32 of the main transformer body is used to collect the position information of the isolating switch of the neutral point of the main transformer, and control the isolating switch of the neutral point of the main transformer according to the received third control signal.

In the structure of the process layer of the inner bridge-connected smart substation in this embodiment, by selecting the main transformer body merging unit 31 and the main transformer body intelligent terminal 32 to realize corresponding functions such as collection and remote control, the number of devices in the smart substation is greatly reduced , saving space.

Preferably, the architecture of the process layer of the inner-bridge connected intelligent substation in this embodiment further includes: a main transformer body protection device 5 .

The intelligent terminal 32 of the main transformer is also used to collect the information of the main transformer.

The main transformer body protection device 5 is used to provide main transformer body protection for the main transformer based on the received main transformer body information as a judgment basis. Specifically, the main transformer body protection device 5 can judge whether the current is offset according to the body information of the main transformer collected by the main transformer body intelligent terminal 32, and if an offset occurs, it will control the disconnector in the main transformer body to trip, and The main transformer provides body protection to ensure the safe operation of the main transformer.

Preferably, in the structure of the process layer of the inner-bridge connected intelligent substation in this embodiment, the main transformer body protection device 5 is integrated in the main transformer body intelligent terminal 32 . Further save space.

Preferably, the structure of the process layer of the inner-bridge connected intelligent substation in this embodiment further includes: a low-voltage incoming line information acquisition control device 6 and a main transformer low-voltage backup protection device 7 .

The low-voltage incoming line information acquisition control device 6 is used to collect the current information on the line interval of each main transformer low-voltage side incoming line and transmit it to the main transformer low-voltage backup protection device 7 .

The main transformer low backup protection device 7 is used to use the received current information on the incoming line interval on the low voltage side of each main transformer as a basis for judgment, and accordingly provide main transformer low backup protection for the main transformer. Specifically, when the current information on the incoming line interval on the low-voltage side of each main transformer exceeds the set value, the main transformer low-voltage backup protection device 7 can determine that a fault has occurred on the low-voltage side of the main transformer, and then control the main transformer low-voltage backup within the protection range. The circuit breaker trips to provide backup protection for the main transformer, which further ensures the safe operation of the grid equipment.

Preferably, in the framework of the process layer of the inner bridge connection type intelligent substation in this embodiment, the low-voltage incoming line information collection and control device 6 is also used to collect the information of all circuit breakers and isolating switches on the incoming line interval on the low-voltage side of each main transformer. The position information is transmitted to the remote control center, and all circuit breakers and isolating switches on the incoming line bays on the low-voltage side of each main transformer are controlled according to the received fourth control signal fed back by the remote control center. Specifically, the remote control center can send the fourth control signal to the low-voltage incoming line information collection and control device according to the grid operation control requirements based on the received position information of all circuit breakers and isolating switches on the low-voltage side incoming line interval of each main transformer 6. Control the corresponding circuit breaker and isolating switch to realize the remote control function.

Preferably, in the structure of the process layer of the inner-bridge connected smart substation in this embodiment, the low-voltage incoming line information collection and control device 6 further includes a low-voltage incoming line merging unit 61 and a low-voltage incoming line integration unit 62 .

The low-voltage incoming line merging unit 61 is used to collect partial current information on the line intervals of the incoming line at the low-voltage side of each main transformer.

The low-voltage incoming line integration unit 62 is used to collect the position information of all circuit breakers and isolating switches on the incoming line bay on the low-voltage side of each main transformer and the position information of the remaining parts on the incoming line bay on the low-voltage side of each main transformer. Current information, and control all circuit breakers and isolating switches on the incoming line bays on the low-voltage side of each main transformer according to the received third control signal.

In the structure of the process layer of the inner-bridge wiring type smart substation in this embodiment, by selecting the low-voltage incoming line merging unit 61 and the low-voltage incoming line integration unit 62 to realize corresponding functions such as collection and remote control, it greatly reduces the number of tasks in the smart substation. The number of devices saves space.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, on the basis of the above description, other changes or changes in different forms can also be made. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (10)

1. A framework for the process layer of an inner bridge connection type intelligent substation, characterized in that it comprises: an incoming line information acquisition control device (1), an inner bridge connection information acquisition control device (2), a main transformer body information acquisition control device ( 3) and the main variable height backup protection device (4); The incoming line information acquisition control device (1) is used to collect the current information on each incoming line interval and transmit it to the main transformer high backup protection device (4); The inner bridge wiring information acquisition control device (2), used to collect the current information on each inner bridge wiring interval and transmit it to the main transformer high backup protection device (4); The main transformer body information acquisition control device (3), used to collect the current information of the neutral point of the main transformer and transmit it to the main transformer high backup protection device (4); The main transformer high backup protection device (4) is used for receiving the current information on each of the incoming line intervals, the current information on each inner bridge line interval and the neutral point of the main transformer The current information is used as the judgment basis, and the main transformer is provided with high backup protection for the main transformer. 2. The framework of the process layer of the inner bridge connection type smart substation according to claim 1, characterized in that: The incoming line information acquisition control device (1) is also used to collect the position information of all circuit breakers and isolating switches on each incoming line interval and transmit it to the remote control center, and feedback from the remote control center according to the received The first control signal controls all circuit breakers and isolating switches on the incoming line interval; The inner bridge wiring information acquisition control device (2) is also used to collect the position information of all circuit breakers and isolating switches on each inner bridge wiring interval and transmit it to the remote control center, according to the received remote control The second control signal fed back by the center controls all circuit breakers and isolating switches on the inner bridge wiring compartment; The main transformer body information collection control device (3) is also used to collect the position information of the isolating switch of the neutral point of the main transformer and transmit it to the remote control center, according to the third information fed back by the remote control center The control signal controls the isolating switch of the neutral point of the main transformer. 3. The framework of the process layer of the inner bridge connection type intelligent substation according to claim 2, wherein the incoming line information acquisition control device (1) includes an incoming line merging unit (11) and an incoming line integration intelligence integration unit(12); The incoming line merging unit device (11) is used to collect partial current information on each of the incoming line intervals; The incoming line integration unit (12) is used to collect the position information of all circuit breakers and isolating switches on each of the incoming line intervals and the current information on the remaining parts of each of the incoming line intervals , and control all circuit breakers and isolating switches on the incoming line bay according to the received first control signal. 4. The framework of the process layer of the inner bridge connection type intelligent substation according to claim 2, wherein the inner bridge connection information acquisition control device (2) comprises a bridge merging unit (21) and a bridge and intelligence integration unit (twenty two); The bridge merging unit (21), configured to collect partial current information on each of the inner bridge line intervals; The bridge-intelligence integration unit (22) is used to collect the position information of all circuit breakers and isolating switches on each of the inner bridge wiring intervals and the current information of the remaining parts on each of the inner bridge wiring intervals , and control all circuit breakers and isolating switches on the inner bridge line bay according to the received second control signal. 5. The framework of the process layer of the inner bridge-connected intelligent substation according to claim 2, wherein the main transformer body information acquisition control device (3) comprises a main transformer body merging unit (31) and a main transformer body intelligent substation. terminal(32); The merging unit (31) of the main transformer body is used to collect the current information of the neutral point of the main transformer; The intelligent terminal (32) of the main transformer body is used to collect the position information of the isolating switch of the neutral point of the main transformer, and control the isolating switch of the neutral point of the main transformer according to the received third control signal . 6. The framework of the process layer of the inner bridge-connected smart substation according to claim 5, further comprising: a main transformer body protection device (5); The intelligent terminal (32) of the main transformer body is also used to collect the body information of the main transformer; The main transformer body protection device (5) is used to use the received main transformer body information as a judgment basis, and provide main transformer body protection for the main transformer accordingly. 7. The structure of the process layer of the inner-bridge connected intelligent substation according to claim 6, characterized in that, the main transformer body protection device (5) is integrated in the main transformer body intelligent terminal (32). 8. According to the framework of the process layer of the inner bridge wiring type intelligent substation according to any one of claims 1-7, it is characterized in that it also includes: a low-voltage incoming line information acquisition control device (6) and a main transformer low backup protection device ( 7); The low-voltage incoming line information acquisition control device (6) is used to collect the current information on the line interval of each main transformer low-voltage side incoming line and transmit it to the main transformer low backup protection device (7); The main transformer low backup protection device (7) is used to use the received current information on the incoming line interval of the low voltage side of the main transformer as a basis for judgment, and accordingly provide main transformer low backup protection for the main transformer. 9. The framework of the process layer of the inner bridge connection type intelligent substation according to claim 8, characterized in that; The low-voltage incoming line information acquisition control device (6) is also used to collect the position information of all circuit breakers and isolating switches on the line interval of each main transformer low-voltage side incoming line and transmit it to the remote control center. The fourth control signal fed back from the remote control center controls all circuit breakers and isolating switches on the incoming line bays on the low-voltage side of each main transformer. 10. The framework of the process layer of the inner bridge-connected intelligent substation according to claim 9, wherein the low-voltage incoming line information collection control device (6) includes a low-voltage incoming line merging unit (61) and a low-voltage incoming line combining unit (61) Intelligent integration unit (62); The low-voltage incoming line merging unit (61) is used to collect part of the current information on the line interval of the incoming line at the low-voltage side of each main transformer; The low-voltage incoming line integration unit (62) is used to collect the position information of all circuit breakers and isolating switches on the incoming line interval of the low-voltage side of each of the main transformers and the position information of each of the low-voltage side incoming lines of the main transformer. and control all circuit breakers and isolating switches on the incoming line bay at the low-voltage side of each main transformer according to the received third control signal.