CN111080232A - Main network scheduling operation instruction issuing system and method for power system - Google Patents
Main network scheduling operation instruction issuing system and method for power system Download PDFInfo
- Publication number
- CN111080232A CN111080232A CN201911149468.6A CN201911149468A CN111080232A CN 111080232 A CN111080232 A CN 111080232A CN 201911149468 A CN201911149468 A CN 201911149468A CN 111080232 A CN111080232 A CN 111080232A
- Authority
- CN
- China
- Prior art keywords
- scheduling
- dispatching
- station
- automation system
- safety area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 18
- 238000012790 confirmation Methods 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 9
- 238000011022 operating instruction Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/10—Office automation; Time management
- G06Q10/103—Workflow collaboration or project management
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/20—Administration of product repair or maintenance
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/06—Energy or water supply
Landscapes
- Business, Economics & Management (AREA)
- Engineering & Computer Science (AREA)
- Human Resources & Organizations (AREA)
- Strategic Management (AREA)
- Economics (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Entrepreneurship & Innovation (AREA)
- Marketing (AREA)
- General Physics & Mathematics (AREA)
- General Business, Economics & Management (AREA)
- Tourism & Hospitality (AREA)
- Health & Medical Sciences (AREA)
- Operations Research (AREA)
- Quality & Reliability (AREA)
- Public Health (AREA)
- Primary Health Care (AREA)
- General Health & Medical Sciences (AREA)
- Water Supply & Treatment (AREA)
- Data Mining & Analysis (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention relates to a main network scheduling operation instruction issuing system of an electric power system, which comprises a main station and a plant station, wherein the main station is connected with the plant station; the main station comprises a scheduling end, a second safety area of the scheduling automation system and a third safety area of the scheduling automation system, the scheduling end is respectively connected with the second safety area of the scheduling automation system and the third safety area of the scheduling automation system, the second safety area of the scheduling automation system is connected with the third safety area of the scheduling automation system, and the plant station is respectively connected with the second safety area of the scheduling automation system and the third safety area of the scheduling automation system; the plant station comprises a main control room and a mobile terminal, a second safety area of the dispatching automation system is connected with the main control room, and a third safety area of the dispatching automation system is connected with the mobile terminal. The main network dispatching operation instruction issuing system of the power system is simple and practical, low in efficiency and high in error rate in the existing mode are avoided, reliability and safety are high, maintenance cost is low, and applicability is stronger.
Description
Technical Field
The invention relates to the technical field of power grid operation and maintenance, in particular to a power system main network scheduling operation instruction issuing system and method.
Background
The current power dispatching mechanism mainly divides dispatching service into main network dispatching and distribution network dispatching, and the traditional dispatching receiving and dispatching command is basically completed through a recording telephone, so that the normative and the accuracy of terms use and operation of participators in the command receiving and dispatching process are ensured. Nowadays, most power grids use wired issuing systems, and the existing wired issuing systems have a number of defects, such as: 1. the resource investment is large, and the investment is very large because each station needs to be configured with a special network port and a special PC, and the requirement is basically not met particularly in the relatively laggard economic region; 2. the maintenance cost is high, and a large amount of maintenance workload and depreciation cost are brought by a special network channel and a special PC; 3. the issuing efficiency is low, and the issuing and receiving process comprises 7 processes of scheduling issuing, station repeating, scheduling confirmation, station repeating after the station operation is finished, scheduling repeating, station confirmation and scheduling order receiving, so that the efficiency is low, and an adjustment space still exists under the condition of ensuring safety; 4. the system can not be used in a station without a special wired network, and the applicability is not strong; 5. when units such as power transmission and the like report information to a dispatching system, the information can not be reported through a network signaling system, and can only be reported through a telephone, so that the accuracy and the efficiency are not guaranteed; 6. the use of the network command system of each site is a low-frequency activity, real-time availability is difficult to ensure, the use reliability is poor, and the maintenance amount is greatly increased by depending on the availability of frequently managed test channels and terminals.
Disclosure of Invention
In order to solve the problems of large resource investment, high maintenance cost, low efficiency, low applicability and poor reliability in the prior art, the invention provides the power system main network dispatching operation instruction issuing system and method, which are simple and practical, avoid the low efficiency and high error rate of the conventional mode, have high reliability and safety, low maintenance cost and stronger applicability.
In order to solve the technical problems, the invention provides the following technical scheme:
a main network scheduling operation instruction issuing system of an electric power system comprises a main station and a plant station, wherein the main station is connected with the plant station; the master station comprises a scheduling end, a second safety area of a scheduling automation system and a third safety area of the scheduling automation system, the scheduling end is respectively connected with the second safety area of the scheduling automation system and the third safety area of the scheduling automation system, the second safety area of the scheduling automation system is connected with the third safety area of the scheduling automation system, and the plant station is respectively connected with the second safety area of the scheduling automation system and the third safety area of the scheduling automation system; the plant station comprises a main control room and a mobile terminal, wherein a second safety area of the dispatching automation system is connected with the main control room, and a third safety area of the dispatching automation system is connected with the mobile terminal.
Furthermore, an isolation area is arranged between the second safety area of the dispatching automation system and the third safety area of the dispatching automation system, so that the safety is higher.
Furthermore, the isolation area is also arranged between the three safe areas of the dispatching automation system and the mobile terminal, so that the safety is greatly improved.
Furthermore, the dispatching automation system is connected with the mobile terminal through the isolation area through a public network, so that the dispatching automation system is safer.
Furthermore, a PC end is arranged in the master control room, and the second safety area of the dispatching automation system is connected with the PC end, so that the safety is higher, and the control effect is better.
A main network scheduling operation instruction issuing method of an electric power system comprises the following steps:
s1: the master station commands the plant station;
s2: after receiving the instruction, the station immediately repeats the instruction to the dispatching end and confirms;
s3: after receiving the telephone, the dispatching end confirms the operation content with the factory station;
s4: the plant station starts to operate;
s5: after the plant station operation is finished, the order is repeated, and the dispatching end telephone is confirmed;
s6: and after the telephone of the dispatching end is confirmed, the operation is finished.
Further, in step S1, the scheduling end starts to issue a command, and the execution state of the scheduling end after the command is issued is displayed to wait for the confirmation of the station telephone, where the operator and the command time are automatically filled according to the operation account and the current time, so that the control effect is better.
Further, in step S2, after the plant station receives the instruction, the execution state display of the PC terminal asks the dispatching terminal to confirm by telephone, where the operator and the command sending time are filled in, and after the plant station receives the instruction, the plant station immediately sends the command to the dispatching terminal to repeat the instruction and confirms, which is more accurate.
Further, in step S3, the dispatching end receives the call and confirms the operation content with the station, and fills in the ordered person, and the execution state of the PC end of the station shows that the operation is being performed, which is more accurate.
Further, in step S6, after the scheduling-side phone confirms, the PC endpoint of the station clicks the completion of the operation and waits for the scheduling-side phone to confirm, and then fills in the completion time and the performer, which are more standard.
Compared with the prior art, the invention has the following beneficial effects:
1. the ordered person can directly receive the order of the ordered person, and errors caused by handwriting records are avoided;
2. the ordered person does not need to spend a large amount of time to record the scheduling instruction word by word and sentence by sentence, and the accuracy and the efficiency of the order sending and receiving are greatly improved;
3. by improving the order receiving and sending program, the intuitive advantage of network order sending is exerted, the recording telephone confirmation is ensured, and the instruction precision and the instruction safety are ensured;
4. the improved program has the advantages that one part of the program sends information through a network, the other part of the program confirms through a telephone, the two parts of the program are not repeated, the order sending and receiving time is not increased under the condition of ensuring safety, and the order sending and receiving program is greatly reduced;
5. only a mobile phone client end command issuing program needs to be developed, a special port and a PC (personal computer) do not need to be additionally arranged, investment is greatly saved, and the construction process of a main network dispatching network command issuing system can be greatly promoted;
6. the client on the mobile terminal is maintained by a user, so that additional maintenance personnel are not required, and the maintenance cost is greatly reduced;
7. the application prospect is wide;
8. the wireless system can be used as a backup system under the condition that the wired system is unavailable, so that the reliability of the whole system is improved;
9. outdoor units such as power transmission and the like can receive or send information through the wireless network client and the scheduling terminal, and communication efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present invention, and it is obvious to those skilled in the art that other drawings can be obtained based on the drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a main network dispatching operation instruction issuing system of an electric power system according to the present invention;
fig. 2 is a flowchart of a method for issuing an operation instruction for scheduling a main network of an electric power system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention comprises the following steps:
as shown in fig. 1, a main network scheduling operation instruction issuing system of an electric power system includes a master station and a plant station, where the master station is connected to the plant station; the main station comprises a scheduling end, a second safety area of the scheduling automation system and a third safety area of the scheduling automation system, the scheduling end is respectively connected with the second safety area of the scheduling automation system and the third safety area of the scheduling automation system, the second safety area of the scheduling automation system is connected with the third safety area of the scheduling automation system, and the plant station is respectively connected with the second safety area of the scheduling automation system and the third safety area of the scheduling automation system; the plant station comprises a main control room and a mobile terminal, a second safety area of the dispatching automation system is connected with the main control room, and a third safety area of the dispatching automation system is connected with the mobile terminal.
The invention adds wireless network command function on the basis of original network command system, and the factory station can use wired network command system or wireless network system. The wired network command issuing system is unchanged from the original mode. The wireless network command issuing system needs to develop a mobile phone client independently, and the master station system communicates with the mobile phone client through a public network through a second safety area of the dispatching automation system, a third safety area of the dispatching automation system after being isolated. Data communicated through the wireless network still may not be consistent with data of the main station, and if the data are directly operated according to instructions, a safety problem may be caused, so that the situation is avoided by improving a command sending and receiving method, namely, the command information is sent by a single party and then confirmed by a telephone of the other party, the command information transmitted through the public network is controlled in a closed loop mode, and 100% of safety is ensured. Meanwhile, the mode can directly receive the instruction content, and the scheduling instruction can be accurately received no matter where the user is, so that the low efficiency and the error of the handwriting record are avoided.
As shown in fig. 1, an isolation area is arranged between the second safety area of the dispatching automation system and the third safety area of the dispatching automation system, so that the safety is higher.
As shown in fig. 1, an isolation area is also arranged between the three safety areas of the dispatching automation system and the mobile terminal, so that the safety is greatly improved.
As shown in fig. 1, the three safety zones of the dispatching automation system are connected with the mobile terminal through the public network via the isolation zone, so that the dispatching automation system is safer.
As shown in figure 1, a PC end is arranged in the master control room, and a second safety area of the dispatching automation system is connected with the PC end, so that the safety is higher, and the control effect is better.
As shown in fig. 2, a method for issuing an operation instruction for scheduling a main network of an electric power system includes the following steps:
s1: the master station commands the plant station;
s2: after receiving the instruction, the station immediately repeats the instruction to the dispatching end and confirms;
s3: after receiving the telephone, the dispatching end confirms the operation content with the factory station;
s4: the plant station starts to operate;
s5: after the plant station operation is finished, the order is repeated, and the dispatching end telephone is confirmed;
s6: and after the telephone of the dispatching end is confirmed, the operation is finished.
As shown in fig. 2, in step S1, the scheduling end starts to issue a command, and the execution status of the scheduling end after the command is issued is displayed to wait for the confirmation of the factory station telephone, where the operator and the command time are automatically filled according to the operation account and the current time, so that the control effect is better.
As shown in fig. 2, in step S2, after the plant station receives the instruction, the execution state display of the PC terminal asks for a phone confirmation to the dispatching terminal, where the operator and the command sending time are filled, and after the plant station receives the instruction, the phone call repeats the instruction to the dispatching terminal and confirms, which is more accurate.
As shown in fig. 2, in step S3, the dispatching end confirms the operation content with the factory station after receiving the call, and fills in the ordered person, and the execution status of the PC end of the factory station shows that the operation is being performed, which is more accurate.
As shown in fig. 2, in step S6, after the scheduling terminal telephone confirms, the PC endpoint of the factory station clicks the completion of the operation and waits for the scheduling terminal telephone to confirm, and then fills in the completion time and the performer, which are more standard.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A main network scheduling operation instruction issuing system of an electric power system is characterized by comprising a main station and a plant station, wherein the main station is connected with the plant station; the master station comprises a scheduling end, a second safety area of a scheduling automation system and a third safety area of the scheduling automation system, the scheduling end is respectively connected with the second safety area of the scheduling automation system and the third safety area of the scheduling automation system, the second safety area of the scheduling automation system is connected with the third safety area of the scheduling automation system, and the plant station is respectively connected with the second safety area of the scheduling automation system and the third safety area of the scheduling automation system; the plant station comprises a main control room and a mobile terminal, wherein a second safety area of the dispatching automation system is connected with the main control room, and a third safety area of the dispatching automation system is connected with the mobile terminal.
2. The power system main network dispatching operation instruction issuing system according to claim 1, wherein an isolation area is arranged between the second dispatching automation system safety area and the third dispatching automation system safety area.
3. The power system main network dispatching operation instruction issuing system according to claim 2, wherein the isolation area is also provided between the dispatching automation system safety three-area and the mobile terminal.
4. The power system main network dispatching operation instruction issuing system according to claim 3, wherein the dispatching automation system safety three-zone is connected with the mobile terminal through the isolation zone through a public network.
5. The power system main network dispatching operation instruction issuing system according to claim 4, wherein a PC (personal computer) end is arranged in the main control room, and the second safety area of the dispatching automation system is connected with the PC end.
6. An electric power system main network scheduling operation instruction issuing method of an electric power system main network scheduling operation instruction issuing system according to claim 5, characterized by comprising the steps of:
s1: the master station commands the plant station;
s2: after receiving the instruction, the station immediately repeats the instruction to the dispatching end and confirms;
s3: after receiving the telephone, the dispatching end confirms the operation content with the factory station;
s4: the plant station starts to operate;
s5: after the plant station operation is finished, the order is repeated, and the dispatching end telephone is confirmed;
s6: and after the telephone of the dispatching end is confirmed, the operation is finished.
7. The method as claimed in claim 6, wherein in step S1, the dispatching end starts to issue a command, and the execution status of the dispatching end after the command is issued is displayed to wait for confirmation of a station telephone, wherein the operator and the command time are automatically filled according to the operation account and the current time.
8. The method as claimed in claim 7, wherein in step S2, the station receives the command, and the execution status of the PC end displays that the operator and the command time are filled in the PC end, and the station immediately receives the command and repeats the command to the dispatching end.
9. The method for issuing an operating instruction of a power system main grid dispatching system according to claim 8, wherein in step S3, the dispatching end receives the call and confirms the operating content with the plant station, and fills in the command recipient, and the execution status of the PC end of the plant station shows that it is operating.
10. The method for issuing an operation instruction for scheduling of the main network of the power system as claimed in claim 9, wherein in step S6, after the confirmation of the scheduling-side telephone, the PC endpoint of the station clicks the completion of the operation and waits for the confirmation of the scheduling-side telephone, and then fills in the completion time and the executor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911149468.6A CN111080232A (en) | 2019-11-21 | 2019-11-21 | Main network scheduling operation instruction issuing system and method for power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911149468.6A CN111080232A (en) | 2019-11-21 | 2019-11-21 | Main network scheduling operation instruction issuing system and method for power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111080232A true CN111080232A (en) | 2020-04-28 |
Family
ID=70311539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911149468.6A Pending CN111080232A (en) | 2019-11-21 | 2019-11-21 | Main network scheduling operation instruction issuing system and method for power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111080232A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203406903U (en) * | 2013-02-22 | 2014-01-22 | 广东电网公司中山供电局 | Distribution network scheduling instruction processing system based on technology of mobile communication |
| CN104319879A (en) * | 2014-09-29 | 2015-01-28 | 国家电网公司 | Power grid dispatching command remote real-time interaction system and method thereof |
| CN104468849A (en) * | 2015-01-04 | 2015-03-25 | 云南电力调度控制中心 | Cross-safe-area service invocation achieving method based on virtual service |
| CN107070955A (en) * | 2017-06-16 | 2017-08-18 | 易讯科技股份有限公司 | The transmission method and device of a kind of electric power system data |
| CN109508945A (en) * | 2018-06-22 | 2019-03-22 | 广东电网有限责任公司 | A kind of method of dispatching automation information point automatic checking |
| CN110266110A (en) * | 2019-06-26 | 2019-09-20 | 广东电网有限责任公司 | A kind of power network dispatching system |
-
2019
- 2019-11-21 CN CN201911149468.6A patent/CN111080232A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203406903U (en) * | 2013-02-22 | 2014-01-22 | 广东电网公司中山供电局 | Distribution network scheduling instruction processing system based on technology of mobile communication |
| CN104319879A (en) * | 2014-09-29 | 2015-01-28 | 国家电网公司 | Power grid dispatching command remote real-time interaction system and method thereof |
| CN104468849A (en) * | 2015-01-04 | 2015-03-25 | 云南电力调度控制中心 | Cross-safe-area service invocation achieving method based on virtual service |
| CN107070955A (en) * | 2017-06-16 | 2017-08-18 | 易讯科技股份有限公司 | The transmission method and device of a kind of electric power system data |
| CN109508945A (en) * | 2018-06-22 | 2019-03-22 | 广东电网有限责任公司 | A kind of method of dispatching automation information point automatic checking |
| CN110266110A (en) * | 2019-06-26 | 2019-09-20 | 广东电网有限责任公司 | A kind of power network dispatching system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106953918B (en) | Master-slave station programmed control system and method based on universal service protocol | |
| CN104269924A (en) | Power distribution terminal system based on IEC 61850 and realizing plug and play mechanism | |
| CN104269934B (en) | Based on the supervisory control of substation information adjustment method of moving analog scheduling station | |
| CN107749811B (en) | Power distribution terminal access adaptive debugging analysis method based on power distribution master station | |
| CN108683636B (en) | Charging pile communication method and system | |
| CN110401692B (en) | Integrated automatic checking and accepting system and method for monitoring information of transformer substation | |
| CN104460589A (en) | Mobile debugging system with simulation dispatching master station | |
| CN113868484B (en) | Data acquisition method, device and system for semiconductor process equipment | |
| CN104125094A (en) | System and method for processing communication network faults of State Grid Corporation of China | |
| CN106570781B (en) | Intelligent substation monitoring information step-by-step acceptance method based on three-layer two-network structure | |
| CN111080232A (en) | Main network scheduling operation instruction issuing system and method for power system | |
| CN114094702B (en) | One-key execution method for whole scene of power grid dispatching instruction | |
| CN111738461A (en) | Fault emergency processing system based on ubiquitous power Internet of things | |
| CN115065702B (en) | New energy data access system and method suitable for new generation scheduling master station | |
| CN111799779B (en) | Load-shedding plan value curve transmission method and system | |
| CN104216399A (en) | Image transmission based remote distribution transformer terminal debugging system and remote debugging method thereof | |
| CN109428907B (en) | Cross-power dispatching area network operation ticket system | |
| CN114167820A (en) | Internet of things terminal rapid debugging and testing system and method | |
| CN208572106U (en) | A kind of system for the alarm of power communication access path | |
| CN107834697B (en) | Method for improving response speed of telemetering data of dispatching automation system in case of power grid fault | |
| CN112653233A (en) | Method for realizing transformer substation monitoring information acceptance operation visualization based on source end maintenance technology | |
| CN113490263B (en) | Power saving control method and device, electronic device, and storage medium | |
| CN216526060U (en) | Automatic debugging system for monitoring information of intelligent substation | |
| CN103346850A (en) | Terminal testing device based on LTE230 system | |
| CN203444321U (en) | Wireless networking control system of spinning machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200428 |