CN202798152U - Network layering distributed intelligent regional power grid - Google Patents

Abstract

The utility model relates to a layered and distributed intelligent regional power grid, which includes a control layer, a device layer and a process layer; the control layer is composed of a regional monitoring center and a regional dispatching center. The beneficial effect of the utility model is that: the relay protection system (including automation) and the dispatching system are centrally and integratedly configured to adapt to the three-level dispatching. Promote the resolution of dispatching operation management levels (national dispatch, network dispatch, provincial dispatch, local dispatch, county dispatch, centralized control station, substation), complex management, and difficulty in sharing information. Realize the integration of regulation and control in the true sense, and the scheduling data is upgraded from a few seconds to a sub-second level, making system analysis, early warning, and control real-time, enabling real-time online regulation of scheduling strategies and intelligent scheduling.

Description

A Smart Regional Grid with Network Hierarchy and Distribution

technical field

The utility model relates to a network sub-distributed structure of an intelligent substation regional power grid.

Background technique

The existing substation, centralized control station, and dispatching structure lead to more management levels in the existing dispatching operation and complex information exchange. It is urgent to realize the integration of regulation and control and the integrated design of substation automation system. The traditional component-oriented backup protection is difficult to set and cooperate, and it is difficult to coordinate the contradiction between selectivity and rapidity; many problems such as inability to adapt to distributed power supply access, and inability to realize ring network operation are increasingly prominent; based on IEC61850-9-2 protocol The advanced data sharing sampling transmission technology and the technology and equipment supporting the IEEE 1588 time synchronization protocol are mature. The development of smart grid, smart substation, and integrated control technology has promoted the attention and research on network protection.

As backup protection when the main protection is abnormal, it is necessary to consider the level-by-level coordination of the protection range and the level-by-level coordination of the action delay. Due to the influence of system dynamic changes and the increasing complexity of the network structure, it is becoming more and more difficult to set the protection range. Coordination brings a lot of inconvenience to the setting calculation of relay protection, and may even cause erroneous behaviors such as setting error protection and over-level tripping, which affects the stable operation of the power system; at the same time, the complexity of the network structure and the long delay time of the backup protection setting also cause It will have a serious impact on the stable operation of the power system.

To sum up, the complexity of the network makes the traditional dispatching and relay protection system more complicated, seriously affecting the security and stable operation of the system.

Utility model content

The purpose of the utility model is to provide a network layered and distributed intelligent regional power grid to solve the problem of poor security and stability of the regional power grid based on traditional dispatching and protection methods.

In order to achieve the above object, the solution of the present utility model is: a network layered and distributed intelligent regional power grid, including a control layer, a device layer and a process layer; the control layer is composed of a regional monitoring center and a regional dispatching center, and the regional monitoring Both the center and the regional dispatch center are connected to the control layer optical fiber network; the device layer is composed of a front server group and at least one protection server group, and the front server group and the protection server group are connected to the device layer fiber network and the control layer fiber network The process layer includes equipment and intelligent components at intervals. The intelligent components are connected to the PTN communication network through the PTN real-time transmission equipment, and the PTN communication network is connected to the optical fiber network of the equipment layer.

The regional monitoring center of the control layer is a regional monitoring center with the main control function of the substation.

The intelligent regional power grid with hierarchical distributed network is a hierarchical distributed network architecture. By dividing the three-layer network into a control layer, a device layer, and a process layer, it focuses on solving technical problems such as transmission delay, flow, congestion, and redundancy, and improves power consumption. The stability of system operation. According to the dispatching management scope of the network layered and distributed intelligent regional power grid, the relay protection and automation system functions of the substation are all moved up to the dispatching control center and completed in a centralized manner. The traditional component-oriented design idea is upgraded to system-oriented protection and automation. Design, fixed value without adjustment, adapt to new energy access, ring network operation and other changes, integrated control and substation automation system integrated design, to achieve integrated protection, monitoring and control. The network layered and distributed intelligent regional power grid, based on the standardization of substation information sharing and the characteristics of transmission network, transmits the information of multiple substations in the regional power grid to the monitoring center, and realizes relay protection and automation/monitoring functions in a centralized manner.

The beneficial effect of the utility model is that: the relay protection system (including automation) and the dispatching system are centrally and integratedly configured to adapt to the three-level dispatching. Promote the resolution of dispatching operation management levels (national dispatch, network dispatch, provincial dispatch, local dispatch, county dispatch, centralized control station, substation), complex management, and difficulty in sharing information. Realize the integration of regulation and control in the true sense, and the scheduling data is upgraded from a few seconds to a sub-second level, making system analysis, early warning, and control real-time, enabling real-time online regulation of scheduling strategies and intelligent scheduling.

Description of drawings

Fig. 1 is a schematic diagram of the hierarchical distributed architecture of the utility model;

Fig. 2 is an example of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, a network layered and distributed intelligent regional power grid includes a control layer, an equipment layer, and a process layer; the control layer is composed of a regional monitoring center and a regional dispatching center, and both the regional monitoring center and the regional dispatching center are connected to the control layer optical fiber Network; the device layer is composed of a front server group and two protection server groups, the front server group and the protection server are connected upward to the optical fiber network of the control layer, and connected downward to the optical fiber network of the equipment layer; the process layer includes the equipment and intelligent components of each interval ( Some intervals also include merging units and collectors), the intelligent components are connected to the PTN communication network through the PTN real-time transmission equipment, and the PTN communication network is connected to the optical fiber network at the equipment layer.

Control layer: The regional monitoring center of the control layer is a regional monitoring center with the main control function of the substation, that is, the function of the traditional substation control layer is moved up to the regional monitoring center of the control layer, and the main control room and station control layer are canceled in the substation.

Equipment layer: The primary and rear protection of the regional power grid is concentrated in the protection device of the equipment layer (redundant), simplifying the interval layer. Configure fast distance section I protection in the station. As shown in Figure 2, the protection server group at the equipment layer includes the main protection server group, the backup protection server group, and the master-rear integrated protection server group. way.

Process layer: localization of equipment in the station, integration of substation measurement and intelligent components with primary equipment, integrated installation, cancellation of the main control room in the station, greatly reducing the secondary equipment and floor space. As shown in Figure 2, the process layer communication also adopts a redundant method, and the intelligent components of each interval are connected to two PTN real-time transmission devices for communication.

Claims (2)

1. the distributed Intelligent region electrical network of network hierarchy is characterized in that, comprises regulation and control layer, mechanical floor and process layer; Described regulation and control layer is made of area monitoring center and subdispatch center, is connected with the subdispatch center and connects a regulation and control layer fiber optic network in the area monitoring center; Described mechanical floor consists of front server group and protection server group communication connection device layer fiber optic network and described regulation and control layer fiber optic network by front server group and at least one protection server group; Described process layer comprises equipment and the intelligent assembly at each interval, and intelligent assembly is by PTN real-time Transmission equipment connection PTN communication network, and the PTN communication network connects described mechanical floor fiber optic network.

2. the distributed Intelligent region electrical network of a kind of network hierarchy according to claim 1 is characterized in that, the area monitoring center of described regulation and control layer is the area monitoring center that possesses transformer station's master control function.

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