Common use of System Performance Clause in Contracts

System Performance. The HVDC system shall be designed to meet all performance requirements and shall be compatible with the existing power system. The HVDC system shall not cause instability to the existing AC network. Also, it shall not cause adverse effects to other HVDC system(s) in vicinity, solar based generation plants (near Khavda KPS-3) as well as other Generating Units. This shall be verified by stability, multi-infeed and Sub Synchronous Resonance (SSR) studies and any other Study required, if applicable. The steady state, dynamic, HVRT, LVRT, Harmonic and flicker performance requirements as per applicable Rule/ Regulations/ Standards/ Guidelines shall be applicable. The rated power transmission capacity shall be defined and guaranteed at Rectifier DC Bus and rated transmission voltage shall be defined at the rectifier DC bus. In the calculation of the power transmission capability, the most unfavourable combination of control and measurement tolerances shall be considered and without redundant cooling and submodules. All components of the transmission system shall be rated to meet the requirements given in this section and other requirements specified elsewhere in this Specification. HVDC system performance and rating requirements for high voltage equipment and other critical equipment shall be determined taking into account the extreme values of environmental and AC and DC system parameters as applicable for performance/rating requirements given in this specification and manufacturing and measuring tolerances. TSP shall determine the PQ diagram of the individual converters as well as the total DC transmission system. The PQ diagram shall be valid for all 400 kV AC bus voltages in the range of 380 kV to 420 kV and for all frequencies in the range of 48.5 Hz to 51.0 Hz. The PQ diagram shall also show, where applicable, different limits for 47.5 Hz to 52.5 Hz and for bus bar voltages in the range of 360 kV to 440 kV. Pole Power 0-1250 MW 410 410 Pole in STATCOM mode 0 625 625 There shall be no restriction on connecting, starting and operating the HVDC link if frequency and AC voltage at rectifier station are within 48.5-51.0 Hz and 380 - 420 kV respectively. Khavda end of link shall be operated as a grid forming facility that provides 50 Hz power frequency and controls the AC voltage level at 400 kV bus. For calculations, the maximum line resistance shall be taken at a maximum conductor temperature of 85oC with minimum wind velocity and maximum solar radiation while for minimum line resistance the conductor temperature shall be taken as 0oC.