Computation of Total Transfer Capability and Available Transfer Capability for Southern Region States on Control Area Wise:
Abstract:
Indian power system is a complex group of five electrical regions, one of the regions being Southern Region which is connected to other regions via three HVDC links but is the only electrical region in India which is yet to be synchronized through AC links with any of the remaining regions. India being a country where the power generation is less than the demand due to which system is prone to extreme strain. Southern Region of India has a huge potential for Wind Energy and in the past six years there has been addition of 12000MW of wind power generating stations. On the other hand it can be observed from the study that even though renewable energy is being utilized but the supporting transmission capacity of element connecting these renewable energy sources have not been up-graded at the same pace as increase in generation from renewable resource. This is the same case with the transmission system present in all the states present in the southern region. The system has not been improved according to the increase in the local power demand because of which there is a limit to how much power can be transmitted using the present system. Another factor that makes the case even more complex is that the shortage of power has increased over the years forcing the local power control authority to import power from other states and from central GRID. However because of the present transmission system there is a limit to how much power can be drawn from regional grid. This limit is called as Total Transfer Capability (TTC). There are various reasons which makes it necessary to compute TTC and ATC for every control areas like: delay in commissioning of new generating stations and transmission elements, increasing stress on network due to increasing demand and avert situation like recent grid disturbance in N-E-W Grid. With the help of TTC and ATC limits states can have proper demand side management and accordingly plan procurement options. Southern Region Load Dispatch Center has initiated ATC and TTC calculation for every southern region state so as to maintain the overall system stability and also to determine the transmission elements which are a cause of concern and needs to be upgraded or figuring out the need of new transmission elements which can enhance the performance of the Southern Region transmission system. The whole study was guided by the criteria set by the parameters and stability limits set by The Indian Electricity Grid Code (IEGC) released by Central Electricity Regulatory Commission (CERC) and Technical Standards for GRID Connectivity released by Central Electricity Authority (CEA) which lays down rules, guidelines and standards to be followed by various persons and participants in the system to plan, develop, maintain and operate the power system, in the most secure, reliable, economic and efficient manner, while facilitating healthy competition in the generation and supply of electricity.
The Report presents the knowledge gathered from simulation of real time power system elements data for Southern Region States which are: Kerala, Tamil Nadu, Karnataka and Andhra Pradesh.
It is an attempt to calculate Available Transfer Capability (ATC) and Total Transfer Capability (TTC) by carefully studying the present power system scenario in the state. This report also elaborates the present power system condition and bottlenecks in the transmission system which limits the capability of the system to meet higher consumer demand in all the states. A tutorial has also been given in this report so that anyone who would like to develop skill in PSSE software to simulate complex power system scenario. The study was carried using loading pattern for 2012-13 (March to March), During this year the monsoon level was average due to which reservoir level were not at their optimum level. There was also acute fuel shortage for the gas generating stations in the Vemagiri complex of Andhra Pradesh. Under these circumstances the utilization of ISTS margin by AP, has relieved the sub transmission system to some extent.
CHAPTER 1 – OVERVIEW
CHAPTER 2 – ASSESMENT
CHAPTER 3 - TYPES OF CONDUCTOR AND THEIR LOADING CAPACITY
CHAPTER 4 - PSSE SOFTWARE AND SAMPLE CASE STUDY
CHAPTER 5 – KERALA
CHAPTER 6 – TAMIL NADU
CHAPTER 7 – KARNATAKA
CHAPTER 8 – ANDHRA PRADESH
CHAPTER 9 – RESULT
REFERENCE
DISCLAIMER
All the above mentioned chapters are available in my full thesis. My thesis is available at V.I.T University's Library and Southern Regional Load Dispatch Centre (SRLDC) Library. For more details and help contact me.
I have noticed that not many tutorials are available for PSSE Software which is supported by Siemens. If you would like to learn about this software package contact me.