2. Control of the Substation Components

In order to arrange the automated control of the substation components, the latter shall have electrical (electromechanical) operating mechanism. The number and types of controllable switching units (SU) are determined by the Key diagram of the substation.

The list of SU covered by the function of automated control:

• SU 330 kV (circuit-breakers, disconnectors, eathing blades);

• SU 110 kV (circuit-breakers, disconnectors, eathing blades);

• SU 10/35 kV (circuit-breakers);

• main/input and section circuit-breakers (CB) of direct current board (DCB) and auxiliary board 0.4 kV;

• on-load tap changer (OLTC) of autotransformers (AT) – in case of OLTC installation.

• Controllable fire extinguishing system component (valves, air gates etc).

The Automated Control System final controlling elements are:

• for SU 330 kV and 110 kV – microprocessor breaker devices (MBC);

• for SU 10/35 kV (circuit-breakers) – circuit-breaker operating mechanisms control cabinet

• for SU 0.4kV - automated circuit-breakers with control function;

• for OLTC devices – individual programmable controllers or automatics with OLTC operating mechanisms that ensure remote control.

• for fire extinguishing system components – individual programmable controllers or automatics with operating mechanisms.

• main and section circuit-breakers (CB) of direct current board (DCB) and auxiliary board 0.4 kV.

3. Control of 330 – 110 kV Switching Units

Operational control of switching units is carried out by issuing a pulse command to operating mechanisms of three phases simultaneously. Due to design solution of arranging control of the switching units, control shall be carried out by three phases simultaneously. In case of manual control by operating personnel turning on/off switching units shall be made via the keys in the SU control cabinets.

Information on the status of each circuit breaker phase shall arrive to controller. The status of all circuit-breaker phases of the switch is defined according to algorithm based on the analysis of the situation of each phase position.

Information of the status of disconnectors and eathing blades shall arrive to controller in the form of:

• “all three phases are open”,

• “all three phase are closed”,

• “information on not switched phase ".

It is required to monitor SU switching time. For circuit-breakers, disconnectors and earthing blades the switching time is defined by a setting value. Exceeding the time setting switch of SU must be accompanied by a warning to the personnel with fixing in the list of events.

4. Control of 35 – 10 kV Switching Units

Is carried out for three phases by issuing a pulse command and does not envisage individual phase control. Data on 10-35 kV SU status shall arrive in the form of two signals of position.

Terms of Reference for the feasibility study for the reconstruction of SS 330/110/35/10 kV does not provide replacement equipment 10/35 kV.

In developing the detailed design to take into account the ability to control and condition monitoring of equipment AIS 35 kV and switchgear 10 kV of ACS TP SS, at the subsequent reconstruction of the SS.

4. Database of historical data maintaining

All recorded operating parameters and events are subject to archiving for retrospective analysis of state and modes of equipment operation.

43. Organization of ACS TP SS

    1. Basic Architecture Principle of ACS TP SS

The ACS TP SS architecture shall be based on the up-to-date software/hardware technologies, implementing the basic information and control functions.

ACS TP shall be built as a multileveled distributed man-machine system, consisting of hardware and software-compatible tools and integrated by local area networks, and operating in real time mode.

2. Requirement to structure and functionality of the system

The ACS TP SS shall be designed with the use of up-to-date software and hardware based on microprocessor devices.

In case of connection loss with substation level or connection level – process level should work stand-alone.

The SS main communication protocol for data exchange between the ACS TP elements and microprocessor units of relay protection and emergency control shall be IEC 61850-8.

Data exchange with other autonomous systems may be performed with the use of other standard protocols, in case these systems do not support IEC 61850-8. A protocol other than IEC 61850-8, may be used for data exchange between relay protection and emergency controls devices as an exceptive measure under sufficient justification and approval by the Employer.

All ACS TP elements shall be synchronized from a redundant common time source ensuring receipt of the standard time from external synchronization source.

Power supply of all the ACS TP equipment shall be provided from two redundant uninterruptible power supply units.

When designing ACS TP it is required to envisage a possibility of expanding the system in case of development or reconstruction of the object of control.

Operating conditions of the Automation objects correspond to the lukewarm climate according to GOST 16350-80.