1. WHAT IS THE OPERATION CONTROL CENTER?
Operation Control Center (OCC): is a center equipped with an infrastructure system including information technology and telecommunications to remotely monitor and control a group of power plants, power stations or switchgear on the power grid.
On the basis of the overall architecture orientation of the dispatch centers in the Vietnamese power system, the overall structure of the OCC system is shown as follows:
The overall structure includes:
- Gateway & server;
- Technical computer and historical data storage;
- Hotline A0, Ax;
- Monitor screen;
- Connecting devices: Switch, Router (fire wall), E1/FE Converter, communication cable.
2. ADVANTAGES OF SETTING UP THE OCC
Technically
- Applying the achievements of the Fourth Industrial Revolution (Industry 4.0), in line with the development roadmap of the smart grid according to the EVN’s policy;
- Ensuring the ability to operate and monitor the electrical equipment of the plants connected to the OCC continuously;
- Reducing equipment operation time, interruption, limited errors and incidents subjectively, improving the reliability of the power supply when using SCADA system in monitor and operation;
- Improving the qualifications of operation and maintenance personnel;
- Mastering the technology of the whole system (including wind power, solar power, ...).
Economically:
- Reducing the number of operators, improving labor productivity and operational management efficiency. At the OCC, arrange a shift with at least 03 people per shift (01 shift leader and 02 operators). At power plants, only staff are arranged to support the operation.
- The construction of the OCC together with the power plants will help reduce the number of contacts with the Dispatch Center to 01, saving costs for renting telecommunication channels.
3. FUNCTIONS OF THE OPERATION CONTROL CENTER (OCC)
The OCC not only performs the monitor function but also allows engineers to assess the operation status of the plant, remote control, open and close the equipment, change the factors to optimize the operation mode of the plant, ensure safety, save costs and ensure efficient operation of the plant.
The OCC's control range includes:
Monitoring the operation status of the power plants under supervision.
Receiving the dispatching instructions from the dispatch centers and exercising the dispatching instructions for power grid equipment that have been assigned manipulation rights, specifically:
- Starting/Stopping the power plant.
- Increasing/decreasing active power (P).
- Increasing/decreasing reactive power (Q).
- Changing the OLTC of the transformer and controlling the cooling system of the transformer.
- Closing/Opening equipment such as: circuit breakers & disconnector switches.
Collecting and processing operation information, breakdowns, reporting to the dispatch centers about any abnormality and breakdowns.
Executing with technical management, saving records, documents and operating equipment Perform technical management, store equipment operation records and documents under regulation.
Checking and supervising the operation & repair staff, handling abnormalities and breakdowns on the power grid.
4. CONCLUSION
The establishment of the Operation Control Center (OCC) ensures that the operation management, power production, repairment and maintenance of power plants is more efficient; that meets the increasing requirements of customers for reliability operations: power supply, power loss reduction, management efficiency improvement, personnel safety and enhancement of the equipment life of the plant.
This is also an important step forward in the smart grid development according to the policy of Vietnam Electricity, aiming to enhance labor productivity and apply Industry 4.0 in the operation management, enhance the competition of business in the market…
VATEC with a team of experienced engineers in the field of Renewable Energy, we are ready to support the Investor in the design and apply for approval by the competent authorities on the establishment of the Operation Control Center (OCC) for solar power plants, wind power plants, hydropower plants, etc.
References:
- Circular 40/2014/TT-BCT dated November 5, 2014 of the Minister of Industry and Trade on stipulating the Procedure for dispatching of national power system;
- Circular 31/2019/TT-BCT dated November 18, 2019 of the Ministry of Industry and Trade on amending to some articles of the Circular No. 28/2014/TT-BCT dated September 15, 2014 of the Minister of Industry and Trade prescribing procedures for handling faults in national power system, Circular No. 40/2014/TT-BCT dated November 05, 2014 of the Minister of Industry and Trade prescribing procedures for dispatching of national power system and Circular No. 44/2014/TT-BCT dated November 28, 2014 of the Minister of Industry and Trade prescribing switching procedures in the national power system.
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