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A Definition Of System Services Essay

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System services
This chapter contains a definition of system services (SyS) which are both managed and coordinated by ČEPS.
ČEPS is, according to the Energy Act, responsible for ensuring system services for the power system at the transmission system level. The system services provided by ČEPS serve to ensure both the secure and reliable operation of the power system and the quality of electricity transmission and satisfy the various international obligations set out by the UCTE. ČEPS provides the following system services:
1) Maintaining the quality of electricity
This service entails the use of the following technical-organisational tools: o Management of the summary power reserve for primary frequency control o Secondary f/P control o Secondary voltage control o Tertiary voltage control o Ensuring the quality of the voltage sine wave o Ensuring transmission stability
The criteria for the quality of electricity follow current technical standards V.3.
2) Real time active power balancing
This service requires the use of the following technical-organisational tools: o Load frequency control o Tertiary active power control o Dispatcher reserve
The criteria for evaluating the quality of active power balancing (the control of power interchange at the planned level) are contained in recommendations provided by the UCTE (Ground rules concerning primary and secondary control of frequency and active power within the UCPTE) and in the Catalogue of requirements for

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