System operator implemented a digital monitoring system of stocks of stability on two controlled sections in CUC of Siberia

2019: Start of SMZU on sections "Krasnoyarsk, Kuzbass is the West" and Bratsk-Irkutsk

On June 7, 2019 SO UES announced that its branch — "Interconnected dispatching office of power supply system of Siberia" (ODU of Siberia) — Krasnoyarsk Kuzbass – the West" and Bratsk Irkutsk"-" put into operation the digital monitoring system of stocks of stability (MSSS) on controlled sections "(CUC of Siberia). Thus, SMZU is used at management of the mode already in thirteen controlled sections of operational zone ODE of Siberia, seven of which are controlled in two directions.

For controlled section "Krasnoyarsk, Kuzbass is the West" increase in capacity of the electric network due to use of SMZU is to 500 MW, for controlled section Bratsk-Irkutsk – up to 150 MW.

With implementation of SMZU in controlled sections "Krasnoyarsk, Kuzbass is the West" and Bratsk-Irkutsk the next stage of implementation of digital technologies at management of the electrical power modes is completed that, as noted, will provide the maximum use of capacity of the electric network of CUC of Siberia for issue of power of the Angaro-Eniseysky cascade of the HEPS in the western part of UES of Russia.

SMZU are the developed STC of EEC together with SO UES the software and hardware complex optimizing settlement process of the maximum allowed overflows of the power (TIR) in the electric network. A system is intended for calculation of value TIR in real time that allows to consider the current changes of a circuit and regime situation in power supply system and by that provides additional opportunities for use of capacity of the electric network and the choice of the optimal control algorithm with the modes of power supply system without decrease in level of its reliability.

In addition to 13 controlled sections of CUC of Siberia, SMZU is implemented on six sections in CUC of the South, on four sections in CUC of the Urals, on three sections in CUC of the Northwest and on one – in the Kola power supply system. And SMZU on controlled sections of Nazarovskoye, "Kuzbass is the West", "Kazakhstan – Siberia 1", "Kazakhstan – Siberia 2" in CUC of Siberia and controlled section East in CUC of the South is used not only for management of the electrical power mode, but also as the technology tool of wholesale market – for carrying out calculations in the market for the day ahead and the balancing market. In trial operation as of June 7 there are SMZU in the Crimean power supply system and in CUC of the East.

Implementation of SMZU is a real step to digitalization of the Russian power industry, along with input of centralized systems of antiabnormal automatic equipment of third generation in power supply systems and development of technologies of remote control of the equipment of power facilities. As noted, use in power industry of the advanced digital technologies allows to gain considerable positive effect due to creation on their base of more effective management models technology and business processes.

2018: Start of SMZU on sections "the Krasnoyarsk hydroelectric power station is Nazarovsky state district power plant" and Buryatia-Chita

On November 29, 2018 JSC SO UES branch "Interconnected dispatching office of power supply system of Siberia" (ODU of Siberia) announced implementation of the digital monitoring system of stocks of stability (MSSS) on two controlled sections in Unified Energy System of Siberia.

According to the company, SMZU is applied on controlled sections the Krasnoyarsk hydroelectric power station – Nazarovsky state district power plant and Buryatia – Chita. For November, 2018 in CUC of Siberia SMZU is used already on six controlled sections that allows to use generation most fully.

Implementation of SMZU, along with input of centralized systems of antiabnormal automatic equipment of third generation in the integrated power systems, remote control of the equipment of substations in UES of Russia, became one more step to digitalization of power. Use in power industry of digital technologies allows to gain considerable system effect due to creation on their base of more effective management models technology and business processes.

So, in CUC of Siberia application of SMZU for calculation of the maximum allowed overflows of the active power (TIR) provides up to 700 MW of additional capacity of the trunk power transmission lines for November, 2018.

SMZU is the developed "STC of EEC" together with the System operator the software and hardware complex bringing settlement process of TIR to the following level. The SMZU function is calculation of value TIR in real time that allows to consider the current changes of a circuit and regime situation in power supply system and by that gives additional opportunities for use of capacity of the electric network without decrease in level of reliability of power supply system. Thus, more complete use of capacity of controlled sections is provided that allows to select the optimal control algorithm the modes of power supply system and by that to provide constantly the level of reliability of its work.

The value of overflows of active power on transmission lines and sections – one of the keyword parameters controlled by dispatching personnel of the System operator at management of the electrical power mode of UES of Russia. For ensuring steady work of power supply system specialists of the company calculate the value of the maximum allowed overflows of active power in controlled sections for different circuit and regime situations. Before implementation of SMZU such calculations were carried out for the most severe regime conditions and required considerable time. With respect thereto the efficiency of use of capacity of power grid infrastructure decreased.

Base for calculations are the values of telesignals and distance measurements coming to the dispatching centers of the System operator from power generation facilities in real time and characterizing actual state of power supply system at the time of carrying out calculations. Calculation of TIR is performed on the basis of current meanings of parameters of balance of power supply system, a status of the generating and network equipment, antiabnormal automatic equipment.

For processing of the arriving information and calculation of the maximum allowed overflow of active power in SMZU programs, digital technologies of mathematical modeling of the mode of power supply system, assessment of its status and dostoverization of information are used. For November, 2018 calculations of TIR are carried out to SMZU in the cyclic mode and take from 2 to 10 minutes depending on complexity of model of power supply system.^[1]

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