WO2014059721A1

WO2014059721A1 - Transition method for monitoring system modification process during intelligent modification of conventional substation

Info

Publication number: WO2014059721A1
Application number: PCT/CN2012/084624
Authority: WO
Inventors: 庄黎明; 周健; 陈建民; 张培鸿; 陈跃; 代小翔
Original assignee: 上海市电力公司; 华东电力试验研究院有限公司; 华东电网有限公司; 中国电力工程顾问集团华东电力设计院; 国家电网公司
Priority date: 2012-10-19
Filing date: 2012-11-15
Publication date: 2014-04-24
Also published as: CN102983627A; CN102983627B

Abstract

Provided is a transition method for a monitoring system modification process during intelligent modification of a conventional substation. The method comprises: modifying a 61850 protocol measurement and control device of a bus first, replacing an original bus measurement and control device, and accessing a 61850 protocol intelligent station control level network so as to achieve a spacer-layer logic locking function measured and controlled by the bus and responsible for a remote control operation of an earthing knife switch of the bus; not dismantling the original bus measurement and control device, forbidding a remote control operation function thereof, and guaranteeing the improvement of the spacer-layer logic locking function of an original 103 protocol network side switch; suspending the spacer-layer interlocking function related to the bus measurement and control device in the 61850 protocol intelligent station control level network, and guaranteeing the integrity of a bus disconnecting switch locking function by means of a logic locking function of the station control level; and modifying the original 103 protocol measurement and control devices successively according to strings based on a power outage plan, recovering the bus spacer-layer interlocking function of the 61850 protocol intelligent station control level network after all the modification is finished, achieving the integrity of full-station spacer-layer interlocking, and dismantling the original 103 protocol bus measurement and control devices. The method can be widely used in the field of intelligent modification of conventional substations.

Description

The transition method of the intelligent transformation and monitoring system transformation process of the conventional substation

The invention belongs to the field of power distribution and the like, and particularly relates to an intelligent transformation method for a conventional substation. Background technique

Substations using conventional transformers and secondary equipment are often referred to as conventional substations.

Correspondingly, the use of intelligent devices, with the full station information digitization, communication platform networking, information sharing standardization as the basic requirements, automatically complete the basic functions of information collection, measurement, control, protection, measurement and monitoring, and can support the grid as needed Advanced functions such as real-time automatic control, intelligent adjustment, online analytical decision-making, and collaborative interaction to realize substation interaction with adjacent substations and grid dispatching are called smart substations, also known as digital substations.

With the continuous development of measurement and monitoring technology and equipment, the monitoring requirements for substations are constantly improving. In order to meet the actual needs of remote monitoring and networked operation, more and more conventional substations are being transformed into intelligent substations, or It is called the intelligent transformation of substation.

The intelligent transformation of substation focuses on the intelligent transformation and networking of related equipment in the measurement, control, protection, metering and monitoring systems of existing substation primary equipment, and the construction of a process layer (equipment layer) and spacer layer. And the intelligent substation of the station control layer.

The process layer (device layer) of the intelligent substation includes intelligent equipment, merging unit and intelligent terminal composed of primary equipment and intelligent components, and completes substation power distribution, transformation, transmission and measurement, control, protection, measurement, condition monitoring, etc. Related functions; The interval device of the intelligent substation generally refers to secondary equipment such as relay protection device, measurement and control device, etc., which realizes the function of using one interval of data and acts on the device at the interval, that is, with various remote input/output, intelligent sensors. Communication with the controller; The station control layer of the intelligent substation includes subsystems such as automation system, station domain control, communication system, and timing system, which realizes measurement and control functions for all stations or more than one primary device, and completes data acquisition and monitoring. Control

(SCADA, Supervisory Control And Data Acquisition), operational latching, and related functions such as synchronized phasor acquisition, electrical energy harvesting, and protection information management.

The existing investment in conventional substation equipment is very large, so the transformation of it cannot be reversed. It must take into account the existing equipment conditions and service life, and advance step by step and step by step. The intelligent transformation of conventional substations is different from the construction of new substations, and is also different from the traditional transformation of conventional substations. Before the entire substation system transformation work is completed, the new and old automation monitoring systems must work together. The conventional monitoring and control devices and the intelligent measurement and control devices must also be able to interoperate to some extent.

In the process of intelligent transformation of conventional substation, the new and old sets of automatic monitoring systems coexist and operate, and the network failures and operating program errors that affect each other may cause serious consequences such as failure of the automation control system and protection misoperation. .

At the same time, in the process of conventional substation reconstruction, the unreformed equipment of the substation and the equipment that has been reconstructed are all in operation state. According to the system power outage plan, each measurement and control device is modified one by one and then connected to the intelligent station control layer network.

Specifically, the unmodified monitoring and control device is connected to the IEC 103 protocol communication network of the original microcomputer monitoring system, and the modified monitoring and controlling device is connected to the intelligent monitoring and control IEC 61850 protocol network.

Because the network equipment of 103 protocol communication (using point-oriented technology) and the network equipment of 61850 protocol communication (using object-oriented technology) are inconsistent in communication protocols, they cannot communicate directly with each other, and some monitoring and control devices with interlocking association cannot be exchanged with each other. Data, therefore, in the process of intelligent transformation of substation, the interval measurement and control device can not achieve perfect logic lockout, which greatly affects the continuous safe operation of the substation and the smooth implementation of the existing intelligent transformation of conventional substation. Summary of the invention

The technical problem to be solved by the present invention is to provide a transition method for a conventional substation to carry out an intelligent transformation monitoring system transformation process, which ensures that during the transformation process, the unmodified monitoring system part and the completed monitoring system have complete intervals. The cascading blocking logic ensures the integrity of the monitoring system and the continuous and safe operation of the substation during the intelligent transformation of the existing conventional substation.

The technical solution of the present invention is: providing a transition method for a conventional substation to perform an intelligent transformation monitoring system transformation process, including device switching and functional replacement of a 103 protocol network and a 61850 protocol network, wherein the transition method includes at least the following step-

A. Firstly carry out the transformation of the 61850 protocol measurement and control device of the two busbars, replace the original busbar measurement and control device, access the 61850 protocol intelligent station control layer network, realize the logic layer blocking function of the busbar measurement and control, and be responsible for the remote operation of the busbar ground knife;

B, the original busbar measurement and control device is not removed, its remote control operation function is prohibited, the grounding switch position signal of the busbar is still collected, and communication is performed with the adjacent side switch measurement and control device through the 103 protocol network to ensure the original 103 protocol network. Perfection of the logic blocking function of the interconnecting switch spacing layer;

C. During the transformation process, the interval interlocking interlock function associated with the busbar measurement and control device in the 61850 protocol intelligent station control layer network is suspended, and the logic locking function of the station control layer is used to ensure the integrity of the busbar isolation and closing function;

D. For each "line string" or "line change string" switch measurement and control device, according to the power outage plan, the original 103 protocol test and control device is successively modified, and the 61,050 protocol measurement and control device is used to replace the original 103 protocol measurement and control device. The modified 61850 protocol measurement and control device is connected to the 61850 protocol network;

E. The "side switch" measurement and control device communicates with the modified busbar measurement and control device through the 61850 protocol network to obtain the busbar ground knife information from the busbar measurement and control to ensure the integrity of the associated lockout logic;

F. The "middle switch" measurement and control device and the "side switch" device communicate through the 61850 protocol network to obtain the associated knife gate signal to ensure the integrity of the interval interlocking logic;

G, "Line change string" transformation, should be carried out simultaneously with each side of the main transformer;

H. After all the transformations are completed, restore the busbar compartment interlocking lock function of the 61850 protocol intelligent station control layer network to realize the integrity of the whole station interval layer interlocking;

I. After the integrity of the whole station interval cascading lock is realized, the original 103 protocol bus measurement and control device is removed. Wherein, the "line string" refers to an interval in which the complete interval is composed of two lines and three switches in the 3/2 wiring mode.

The "line change string" refers to an interval in which the complete interval is composed of one line, one main transformer and three switches in the 3/2 wiring mode.

The spacer interlocking function refers to the safe electrical locking function of the operation layer of the spacer layer measuring and controlling device.

The station control layer logic blocking function refers to the safety logic blocking function of the monitoring system.

The "edge switch" refers to a circuit breaker connected to the busbar in the 3/2 wiring mode.

The "medium switch" refers to a circuit breaker that is not connected to the busbar in the 3/2 wiring mode. Compared with the prior art, the advantages of the present invention are -

1. Adopt the implementation steps of “renovating the busbar equipment measurement and control device, and then transforming the line-string or line-changing switch measurement and control device”, implementing “in the process of rebuilding, suspending the busbar interval interlocking blocking function, relying on the station control layer logic blocking The function realizes the protection function of the logic locking function of the busbar disconnector, which ensures that during the transformation process, the unmodified 103 protocol network monitoring system part and the completed 61850 protocol network monitoring system have complete interval interlocking locking logic; 2. In the intelligent transformation process of the existing conventional substation, the integrity of the monitoring system is ensured, and the continuous and safe operation of the substation is ensured;

3. The interval layer measurement and control device can realize perfect logic lockout, which helps the intelligent transformation of existing conventional substation to proceed smoothly. BRIEF abstract

1 is a block diagram showing a transition method of a modification process of the present invention;

2 is a schematic structural diagram of a station control layer modification network according to the present invention;

Figure 3 is a schematic diagram of a primary system of a 500kV 3/2 wiring substation;

4 is a schematic view showing a modified embodiment of the busbar measuring and controlling device of the present invention;

FIG. 5 is a schematic diagram of a modified embodiment of the switch measurement and control device of the present invention. DETAILED DESCRIPTION OF THE INVENTION The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

In FIG. 1, the transition method described in the technical solution includes device switching and functional replacement of a 103 protocol network and a 61850 protocol network, characterized in that the transition method includes at least the following steps -

B. The original busbar measurement and control device is not removed, its remote control operation function is prohibited, the grounding switch position signal of the busbar is still collected, and communication with the adjacent side switch measurement and control device is performed through the 103 protocol network to ensure the logical blocking function of the original 103 protocol network side switch interval layer. Perfection

E. The "side switch" measurement and control device communicates with the modified busbar measurement and control device through the 61850 protocol network to obtain the information of the busbar cutter from the busbar measurement and control to ensure the integrity of the associated lockout logic; F. The "middle switch" measurement and control device and the "side switch" device communicate through the 61850 protocol network to obtain the associated knife gate signal to ensure the integrity of the interval interlocking logic;

I. After the integrity of the whole station interval cascading lock is realized, the original 103 protocol bus measurement and control device is removed. In Figure 2, during the transformation of the conventional substation, the unreformed equipment of the substation and the equipment that has been reconstructed are in operation. According to the system power outage plan, each measurement and control device is modified one by one and then connected to the intelligent station control layer network (ie, the 61850 protocol network). ).

In the figure, the unmodified measurement and control device is connected to the 103 protocol communication network of the microcomputer monitoring system, and the modified measurement and control device is connected to the intelligently monitored IEC 61850 protocol network. 103 The network equipment of the protocol communication and the network equipment of the 61850 protocol communication are incapable of direct communication with each other due to the inconsistent communication protocols. As a result, some monitoring and control devices associated with the interlocking cannot exchange data with each other. Therefore, the interval measurement and control device cannot be realized during the transformation process. Perfect logic blocking.

In Figure 3, the 3/2 wiring mode of the conventional 500kV substation is given. It can be seen from the figure that there are several series of circuit breakers between the two busbars in this type of wiring, each circuit has 3 circuit breakers, and the middle one is called As a contact breaker, a circuit is connected between every two stations, and there are two loops. On average, one half (3/2) circuit breaker is installed in each circuit, so it is called a half circuit breaker wiring, also called 3/2 wiring.

The main advantages of a half-circuit breaker connection -

(1) High reliability;

(2) Good operational flexibility;

(3) Easy operation and maintenance.

In other words, the biggest advantage of the 3/2 wiring method is: Two busbars or one of the circuit breakers are repaired (or faulty), and the external power supply lines corresponding to the circuit breaker are not powered off, thereby improving the reliability of the power supply.

In the wiring of one and a half circuit breakers, the principle of cross configuration should generally be adopted, that is, the circuit of the same name should be connected in different strings, and the power circuit should be combined with the outgoing circuit.

Since this type of wiring is the most common in high-voltage and ultra-high voltage power distribution systems, this application takes this type of wiring as an example to describe its specific technical solutions.

The "line string" in the technical solution refers to an interval in which the complete interval is composed of two lines and three switches in the 3/2 wiring mode, as shown in FIG. 3 of the specification, 501 strings, 502 strings and 505 string; the "line change string" refers to the 3/2 wiring mode, a complete interval consists of one line, one main transformer and The interval formed by the three switches is 503 strings and 504 strings in Fig. 3 of the drawings.

The "edge switch" as used herein refers to the circuit breaker connected to the busbar in the 3/2 wiring mode, such as 5011, 5013, 5021, 5023, etc. in FIG. 3 of the specification; the "middle switch" refers to 3 In the /2 wiring mode, the circuit breakers that are not connected to the busbars are 5012, 5022, 5032, etc. in Figure 3 of the attached drawings.

In Figure 4, in the initial stage of the transformation, the communication board of the busbar equipment measurement and control device is first modified and the intelligent station control layer network is changed. The specific steps are as follows - First, two sets of 61850 measurement and control devices are connected to the busbar measurement and control screen. It replaces the original 2 sets of busbar measurement and control devices, accesses the 61850 network, realizes the logic locking function of the busbar measurement and control, and is responsible for the remote operation of the busbar ground knife. Secondly, the original 2 sets of busbar measurement and control devices are not removed, and their remote control operation function is prohibited. The grounding switch position signal of the busbar communicates with the adjacent side switch measurement and control device through the 103 protocol to ensure the perfect logic locking function of the original 103 network side switch interval layer.

The figure uses solid arrows to indicate the interlocking exchange information of the original 103 protocol network. The numbers in the brackets in the box of the measurement and control equipment represent different protocols.

In Figure 5, after the completion of the busbar measurement and control transformation, the switch monitoring and control device of the string or the line change string is successively modified according to the power outage plan, and the modified switch measurement and control device is connected to the 61850 network. The side switch measurement and control device communicates with the modified busbar measurement and control device through the 61850 statute, and obtains the information of the busbar knives from the busbar measurement and control to ensure the integrity of the associated lockout logic; the middle switch measurement and control device and the side switchgear communicate through the 61850 stipulation. Obtaining the associated knife gate signal ensures the integrity of the bay interlock logic.

The figure uses solid arrows to indicate the interlocking exchange information of the original 103 protocol network; the dotted arrow indicates the interlocking exchange information of the 61850 protocol network, and the rest is the same as Figure 2. In the implementation process of the technical solution, during the transformation phase, the busbar interlocking layer interlocking function is suspended, and the logic locking function of the busbar isolation switch is realized by the station control layer logic locking function. After all the transformation is completed, the busbar spacing layer interlocking function is restored. Achieve the integrity of the full station interval cascading lock. The above embodiments are only intended to explain and explain the present invention, and are not intended to limit the technical solutions of the present invention; those skilled in the art will recognize that the above implementations are within the spirit of the present invention. Variations and modifications of the examples will fall within the scope of protection claimed in the claims of the present invention. Industrial applicability

The invention provides a transition method for the transformation process of the intelligent transformation monitoring system of the conventional substation, Complementing the gaps in this technical field, it ensures that in the process of intelligent transformation of conventional substation, the unmodified monitoring system part and the completed monitoring system all have complete interval interlocking locking logic, which is intelligent in the existing conventional substation. During the transformation process, the integrity of the monitoring system and the continuous and safe operation of the substation are guaranteed. The invention can be widely used in the field of intelligent transformation of conventional substations.

Claims

Claim

A transition method for a conventional substation to carry out an intelligent transformation monitoring system transformation process, comprising device switching and functional replacement of a 103 protocol network and a 61850 protocol network, characterized in that the transition method comprises at least the following steps -

A. Firstly, the modification of the 61850 protocol measurement and control device of the two busbars is carried out, replacing the original busbar measurement and control device, accessing the 61850 protocol intelligent station control layer network, realizing the logic locking function of the busbar measurement and control, and responsible for the remote operation of the busbar ground knife;

C. During the transformation process, the interval interlocking interlocking function related to the busbar measurement and control device in the 61850 protocol intelligent station control layer network is suspended, and the logic locking function of the station control layer is used to ensure the integrity of the busbar isolation and closing function;

F. The "medium switch" measurement and control device and the "side switch" device communicate through the 61850 protocol network to obtain the associated knife gate signal to ensure the integrity of the interval interlocking logic;

H. After the completion of all the transformation, restore the busbar compartment interlocking function of the 61850 protocol intelligent station control layer network, and realize the integrity of the whole station interval layer interlocking;

I. After the integrity of the whole station interval cascading lock is realized, the original 103 protocol bus measurement and control device is removed.

2. The transition method for the intelligent transformation monitoring system modification process of the conventional substation according to claim 1, wherein the "line string" refers to a 3/2 wiring mode, and a complete interval is composed of two lines. And the interval between the three switches.

3. The transition method for the intelligent transformation monitoring system modification process of the conventional substation according to claim 1, wherein the "line change string" refers to a 3/2 wiring mode, and a complete interval is separated by a line, An interval consisting of a main transformer and three switches.

4. The transition method for the intelligent transformation monitoring system modification process of the conventional substation according to claim 1, wherein the interval interlocking blocking function refers to the safety electrical locking function of the operation layer of the interval layer measuring and controlling device.

5. The transition method for the intelligent transformation monitoring system modification process of the conventional substation according to claim 1, wherein the station control layer logic blocking function refers to the safety logic blocking function of the monitoring system.

6. The transition method of the conventional substation according to claim 1, wherein the "side switch" refers to a circuit breaker connected to the busbar in the 3/2 wiring mode.

7. The transition method of the conventional substation according to claim 1, wherein the "middle switch" refers to a circuit breaker that is not connected to the busbar in the 3/2 wiring mode.