THE NEW TRANSMISSION BUSINESS
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1 THE NEW TRANSMISSION BUSINESS q Customer choice: instantaneous changing of suppliers and buyers q Vertical unbundling and horizontal consolidation q Increasing volumes in interregional energy transfers q Proliferation in the number of transactions q Independent grid operators without supply and demand resources q Decentralized decision making 40
2 UNBUNDLING IMPACTS ON OPERATIONS q More frequent changes in system conditions and flows q More volatile pattern of generator commitment q Unpredictable and more frequently varying structure/configuration increased system volatility q Greater variability in controllers q Market price variability 41
3 TRANSMISSION CHALLENGES q Data availability and management q Real-time operations m real-time security monitoring and control m analytical and software tools enhancement q Effective congestion management q Regional transmission planning and expansion m transmission investment incentives m seams issues 42
4 UNDERLYING CHALLENGES: DATA AVAILABILITY AND MANAGEMENT q Two principal aspects: m effective data acquisition and storage m data overwhelm problem: the effective management of the increasing volumes of data q Availability of data is critical due to the potential for conflicts between physical and market data q Effective schemes for data storage, extraction, compression, and visualization are daunting challenges 43
5 THE DATA OVERWHELM PROBLEM q The marked increase in the total number of players q The increasing role of markets q The proliferation in the number of transactions q The impacts of increased volatility in the system q The larger geographic extent of the RTO region q Effective implementation of advances in computing and communications 44
6 CONTROL UNDER UNBUNDLING q The principal role of power system control is to maintain system security q Under restructuring, the providers of the control actions and the controlling authority are separate and independent entities q There is a need to specify effective procedures -- rules of the road -- for the acquisition and deployment of control services 45
7 CONTROL UNDER UNBUNDLING: KEY CHALLENGES q Reexamination of control laws q Integrated control of unbundled generation and transmission q Maintenance of system security without unduly affecting the market q Measurement and metering q Control performance assessment q Effective harnessing of demand-side participation 46
8 ENHANCEMENT OF ANALYTICAL AND SOFTWARE TOOLS q Data visualization q Analytical tools for information management, state estimation, voltage security analysis and available transfer capability q Software engineering q Model development and validation q Training simulators 47
9 TRANSMISSION CONGESTION 48
10 TRANSMISSION CONGESTION q Power system reliability considerations require secure operations q Congestion occurs whenever the outcome of the transmission unconstrained market requires the provision of transmission services beyond the capability of the transmission network q Transmission congestion leads to change in the market equilibrium from that of the transmission unconstrained market; the changes consist of m curtailment in generation or load m reduction in the social welfare m different locational marginal prices (LMPs) 49
11 SOCIAL WELFARE AND SURPLUSES $/MWh consumer surplus producer surplus MWh/h 50
12 SOCIAL WELFARE AND SURPLUSES $/MWh consumer surplus ρ B ρ S congestion rents market efficiency loss deadweight loss producer surplus MWh/h 51
13 CONGESTION COMPLICATIONS q Multiplicity of entities involved : facility owners, new investors, regulators, IGOs q Accommodation of pool and bilateral transactions simultaneously q Increasing load demand q Decreasing reliability level q Low level of investment impose increased stress on the transmission system 52
14 TLR REQUESTS OF LEVEL 2 OR HIGHER number of TLR actions of level 2 or higher Source: North Electric Reliability Council (NERC) 53
15 CONGESTION CHALLENGES q Translating LMPs into long-term investment signals q Effective integration of financial hedging instruments: FTRs and flowgate rights q Managing uncertainty in the behavior of market players 54
16 TRANSMISSION PLANNING IN THE COMPETITIVE ENVIRONMENT q Frequent congestion situations result whenever too many customers compete for transmission services that the grid is capable of providing q Despite the more intense utilization of the grid by the many established and new players, developments in transmission planning have failed to keep pace with the increasing demand 55
17 MAJOR SHIFT IN THE PLANNING PARADIGM q Cessation of the centralized integrated planning of the past q Role of regional planning under the regional transmission organization (RTO) q Unclear responsibility for implementation under the separation of ownership and control q Role of decentralized decision making 56
18 MAJOR SHIFT IN THE PLANNING PARADIGM q Planning, to the extent it is performed in the new environment, is an asset management problem m critical importance of effective risk management m uncertainty in the collection of revenues by investors m regulations in a continuous state of flux m investment under uncertainty 57
19 TRANSMISSION EXPANSION q Network expansion is by its very nature a very complex multi-period and multi-objective optimization problem q Its nonlinear nature and the inherent uncertainty of future developments constitute major complications 58
20 BARRIERS TO TRANSMISSION INVESTMENT q Transmission is a regulated service: tariffs are cost based and not value based q Lumpiness of transmission expansions q Long-term revenue stream needs q Free rider problem q The lack of clarity in regulatory pricing policy q Organizational complexities 59
21 DEMAND AND TRANSMISSION CAPACITY GROWTH 30 % electricity demand transmission capacity expansion
22 PROJECTED GENERATION GROWTH IN Each percentages is with respect to the 1998 installed capacity Source: EPRI change in % 40 and above 20 to 40 0 to 20 61
23 HISTORICAL TRANSMISSION SYSTEM INVESTMENT Source: E. Hirst, U.S. Transmission Capacity: Present Status and Future Prospects, June copyright George Gross, 62
24 TRANSMISSION MAINTENANCE SPENDING total spending 63
25 CHALLENGES IN THE EXPANSION OF THE TRANSMISSION SYSTEM q Formulation of effective incentives for transmission investment q Transmission service pricing on a value rather than cost basis q Effectively utilizing advances in technology and IT systems 64
26 INVESTMENT NEED IN q High Temperature Super-Conducting (HTSC) cables, Advanced Composite Conductors (ACC) q Advanced reactive power compensators q Dynamic measurement of thermal limits q Direct System-State Sensors; WAMS q High-bandwidth communication infrastructure q On-line security assessment applications 65
27 FLOW IMPACTS OF A TRANSACTION FROM RTO A TO RTO B RTO X RTO Y RTO A RTO B RTO Z 66
28 SEAMS ISSUES q Incompatibility between market designs may encumber the well-functioning of cross-border trades q Such encumberment erects barriers to trading energy- and capacity-based services between interconnected markets 67
29 SEAMS ISSUES regional market design regional market design interregional operating procedures interregional operating procedures communication protocols communication protocols RTO A RTO B 68
30 SEAMS ISSUES regional market design interregional operating procedures communication protocols RTO A S E A M S I S S U E S regional market design interregional operating procedures communication protocols RTO B 69
31 SCOPE OF SEAMS ISSUES q Lack of coordinated system operations and planning q Uncertainty in consummating transactions q Increased opportunities for manipulative conduct q Inefficiencies in interregional market trade 70
32 INTERREGIONAL TRADE: KEY CHALLENGES q Infrastructural improvements in m hardware: communication and IT investments m data: information exchange q Specific needs in m transmission service coordination and pricing schemes m recovery mechanisms for capability improvement investments 71
33 BOTTOM LINE q Transmission is the weakest link of restructured electricity business q Both operating and planning aspects of the transmission network provide us new challenges and opportunities in: m data management m real-time operations m congestion management m coordinated planning and expansion 72
34 THE POWER ENGINEERING DISCIPLINE q Power engineering is among the oldest branches of electrical engineering and the field is deemed to be mature q The wide interest in the newer fields, such as microelectronics, nanotechnology, computers, bioengineering and communications, has steadily eroded interest in power engineering q The power industry has not had the type of razzle dazzle that, say, the computer and the other hightech industries have enjoyed for many years 73
35 THE POWER ENGINEERING DISCIPLINE q The restructuring of the electric power industry has dwindled support for power engineering programs and research; this support becomes further diminished by the extensive merger and acquisition trend in the industry q The intensive reduction in engineering personnel at utilities has given the field a certain black eye q The salary range of power industry offers is typically below that of other hot industries 74
36 THE POWER STUDENT ENROLMENTS q The undergraduate student enrolment in the U.S. has been on a downward slope for many years q The graduate student enrolment has been at a more steady level q This level of the graduate enrolments has been due, to a great extent, to the large percentage of foreign students in the M.S. and Ph.D. programs 75
37 U. S. POWER ENGINEERING UNDERGRADUATE ENROLMENTS undergraduate degree recipients Source: G.T. Heydt and V. Vittal, Feeding Our Profession, IEEE Power & Energy Magazine, vol.1, issue 1, Jan/Feb 2003, pp
38 graduate degree recipients U. S. POWER ENGINEERING GRADUATE ENROLMENTS M.S.E.E. Ph.D Source: G.T. Heydt and V. Vittal, Feeding Our Profession, IEEE Power & Energy Magazine, vol.1, issue 1, Jan/Feb 2003, pp
39 FOREIGN GRADUATE STUDENT ENROLMENT 100 percentage of foreign students Ph.D. M.S.E.E Source: G.T. Heydt and V. Vittal, Feeding Our Profession, IEEE Power & Energy Magazine, vol.1, issue 1, Jan/Feb 2003, pp
40 79
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