CYG SUNRI CO., LTD.

Service Promises Service Assurance Service Network Customer Training Common Problems

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Service Promises

Quick service response

Efficient problem handling onsite

Spare parts support in various areas

Service Assurance

Assurance of service personnel

Our service personnel possess comprehensive technical proficiency requiredforinstallation and debugging, maintenance, problem handling and technical support of our equipment, and they can provide high-quality technical services to our customers.

Assurance of spare products and parts

Efforts are made to cover the demand for spare parts in emergency or defective situations locally, shorten the time required to recover from abnormal condition, and ensure system security.

Assurance of closed-loop management system

A visual closed-loop management system is built to control the quality of on-site services and ensure the safety of on-site services, so as to guarantee high-quality completion of services.

Assurance of service platform

We provide quick response to on-site service and technical requests, comprehensively record customer feedback, and continuously improve our service quality.

Service Network

Based in China, we aim to radiate to the world.
Oriented by customer needs, CYG SUNRI provides sincere services, and seeks common development!

Customer Training

Based on the principle of technological innovation and management innovation, we not only provide outstanding products, but also continuously offer supporting training services, so as to enable you to have a deeper understanding of our products. CYG SUNRI has provided user training since 2007, and a mature and complete user training system has been established. We provide classes covering knowledge of the entire power industry, and laboratories with various types of equipment of complete functions, and our star lecturers have rich experiences of engineering practice as well as a relaxed and humorous teaching style.
We provide more than 1000 hours training to nearly 10,000 users from the global power industry every year, including State Grid, South Grid, major power plants, new energy power stations, and overseas power companies, and have won consistent favor from our power users in various areas!

Common Problems

QOne-key sequence control

When using sequence control for dispatch, the dispatching order is unsuccessful.

The troubleshooting method is:

a. Check the channels, and ensure normal communication between the substation anddispatching center;

b. Check whether the source state of this order satisfies related conditions;

c. Check whether names of this operation order are consistent in dispatching center and substation;

d. Check whether the numbers of this operation order are consistent in dispatching center and substation.

QGateway communication

In normal running state, ifno operation in the station, and the gatewayuploads historical record to the dispatching center.

The troubleshooting method is:

a. Obtain communication message of the dispatching center at that time, and check the uploading record;

b. Check the signal SOE time of uploaded historical record, review the tgateway SOE record, and then check the change of state (COS) record of device corresponding to the historical record.

QThe anti-maloperation operation is unsuccessful

(1) The integrated anti-maloperation (i.e., the SCADA is both monitor and anti-maloperation machine), when the SCADA runand receive signal normally.

The troubleshooting method is:

a. Check whether the communication between the anti-maloperation host and key base key base is normal.

b. If the SCADA is redundant mode onsite, check whether the anti-maloperation key base is connected to the host.

(2) Independent anti-maloperation (i.e., using the anti-maloperation system made by external manufacturer, such as UNITECH or CYG).

The troubleshooting method is:

a. Check whether the anti-maloperation system point table in the database configuration tool is consistent with the anti-maloperation manufacturer, and pay attention to their respective starting points.

b. Check whether their communication protocols are consistent.

QSCADA cannot operate normally

After restarting server, SCADA cannot operate normally.

The troubleshooting method is:

a. Check whether the user logging in system is correct.

b. Check whether the server name in network configuration is consistent with the SCADA server name.

c. Check whether the server network has normal communication.

QThe server cannot be started normally

(1) In the station, if found that the power indicator of SCADA machine works normal, but the display is off.

The troubleshooting method is:

a. Check whether there is any problem of the connecting wire between display and video.

b. Check whether thegraphics card of server works normally.

(2) The hostpower indicator is off.

The troubleshooting method is:

a. Check whether the powersocket is live.

b. Check whether the power module on server case works normally.

(3) Can’t restart.

The troubleshooting method is:

Pay attention to error report during the starting process, and find a solution according to the reported error.

QGatewaye communication is disconnected

(1) The downward communication of gatewayis disconnected.

The troubleshooting method is:

a. Check the state of physicalchannel, and thePING method can be employed for inspection.

b. Check whether the interface of gateway reports error, and whether the operation indicator of device is turned on normally.

(2) The upward communication of gateway is disconnected.

The troubleshooting method is:

Check the physical link is normal, and thePING method can be employed for inspection.

QCommunication of protection device is disconnected.

(1) Communication is disconnected during operation.

The troubleshooting method is:

a. Check the state of physicalchannel, and thePING method can be employed for inspection.

b. Check whether theOS communication service state of device is normal.

(2) Communication of new protection does not work.

The troubleshooting method is:

a. For the61850 protocol, check whether the name of model file pointed at by the devicemmsstartup.cfg file is correct.

b. For the 103 protocol, check whether there is monitoring for gateway or SCADA machine in device monitoring.

QProtection device troubleshooting of time synchronization

Abnormal time synchronization of device

The troubleshooting method is:

a. Check whether the time synchronization line is connected reversely.

b.Check whether the connection from theTD terminal to thePhoenix terminal at devicebackplane is normal.

c. Check whether the voltage from time synchronization source to device is normal by checking theamplitude ofvoltage fluctuation.

QProtection light abnormal indicator

(1) Theabnormaloperationindicators of several devices are constantly on before putting into operation.

The troubleshooting method is:

Before putting into operation, the operator onsite hasinput settings of protection device, because the busbar is not charged, the device PT is disconnected, and an error is reported, which is a normal situation.

(2)Operating relay abnormal.

The troubleshooting method is:

Check whether the operation indicator of device is off, and check whether theinspection interface of device reports an error. According to the reported error, contact the manufacturer to provide guidance for troubleshooting of abnormal device operation.

QThe alarm indicator of main transformer backup protection is on during operation.

Themain transformerbackupprotection reports long-time action and alarm action ofcompound voltage blocking during operation.

The troubleshooting method is:

In general, operation is carried out onsite, direct shutdown of busbar on the medium voltageside ofmain transformer leads to adjacent multi-voltage locking contact of backup protection on medium voltage side, the backup protection on highvoltage side is blocked, and this is a normal situation.

QWhether the new main transformer has fixed branch in busbar differential protection?

In busbar protection onsite, the branches of main transformers have fixed bays.

The troubleshooting method is:

The bays of main transformer branches are fixed as L2, L3, L14 and L15, corresponding to main transformers 1~4, respectively.

QPolarity problem of busbar protection

Whether the polarity ofbusbar protection needs to be fixed? If it needs to be fixed, how to fix it?

The troubleshooting method is:

Thepolar ends ofCT in various branches must be consistent; in the device, theCT polarity ofbus couplershould be the same as that of branch on busbar II by default, and theCT polarity of section 1 and section 2 should be the same as theCT polarity of various branches. The bay ofbus coupler 1 should be fixed asL1, the bay of section 1 should be fixed asL23, and the bay of section 2 should be fixed asL24.

QThe total fault signal of protection device is not maintained

After the protection device has sent thetotal fault signal, the signal is reset automatically.

The troubleshooting method is:

According to the new regulations ofSouth Grid, the protection device needs toautomatically reset the signal after sending thetotal fault signal.

QHow to choose the synchronization method of measuring and control device?

Selection ofsynchronization method

The troubleshooting method is:

Themeasuring and control device is equipped with different programs for different regions. In theSouth Grid, thesynchronization method ofmeasuring and control device is determined according to the setting values; in the State Grid, thesynchronization method ofmeasuring and control device is selected according to the remote control channel selected by background.