Phần 17 KHÓA ĐÀO TẠO TÍNH TOÁN ỔN ĐỊNH VÀ ỨNG DỤNG TRÊN PHẦN MỀM PSSE CHO KỸ SƯ HỆ THỐNG ĐIỆN (Ứng dụng tính toán Ổn định điện áp trên Phần mềm PSSE)• PV Simulation Setup PV Simulation Setup • PV Analysis• Exporting the Results to MSExcel• Implementing a Specific PV Transfer• QV Simulation Setup QV Simulation Setup• QV Analysis
TRANSMISSION & DISTRIBUTION A Division of Global Power POWER SYSTEM STABILITY CALCULATION TRAINING D 8 A li ti f V lt St bilit D ay 8 – A pp li ca ti on o f V o lt age St a bilit y July 15, 2013Prepared by: Frida Ceja-Gomez eBook for You 2 OUTLINE • PV Simulation Setup PV Simulation Setup • PV Analysis • Exporting the Results to MS-Excel • Implementing a Specific PV Transfer • QV Simulation Setup QV Simulation Setup • QV Analysis eBook for You 3 EXAMPLE 1 – PV SIMULATION EXAMPLE 1 – PV SIMULATION SETUP eBook for You PV Analysis Applications 4 PV SIMULATION SETUP PV Analysis Applications • What can we do with PV analysis results? • Identify the low voltage transfer limit D t i th i t f lt ll • D e t erm i ne th e po i n t o f vo lt age co ll apse eBook for You PV Analysis in PSS®E 5 PV SIMULATION SETUP PV Analysis in PSS®E • The purpose of this analysis is to identify the • The purpose of this analysis is to identify the maximum power transfer without causing a voltage collapse • This situation can be analyzed as a steady-state problem (dynamic analysis is not necessary) • The analysis is power flow based and it is used to assess voltage variations due to active power changes • For these reason, we will use the non-converted saved case file: Day5_savnw.sav eBook for You Test System 6 PV SIMULATION SETUP Test System • Recall that our test Recall that our test system is divided in 3 areas • As determined before, Area 1 exports power to the other two areas • Therefore, in this case we will perform PV lifth ana l ys i s f or th e power transfer between Area 1 and Area 5 eBook for You Distribution Factor Data File 7 PV SIMULATION SETUP Distribution Factor Data File • In order to carry out a PV analysis, first we need to build a distribution factor data file a distribution factor data file • This file takes the contents of a set of linear network analysis data files in preparation for a variety of analyses, including PV and QV analyses • The input required for the process of creating the Distribution Factor file is contained in three data files: Distribution Factor file is contained in three data files: • Subsystem description data file • Monitored element data file • Contingency description data file eBook for You Special Data Records 8 PV SIMULATION SETUP Special Data Records • The record types shown below are allowed in all three of the linear network analysis data files mentioned above the linear network analysis data files mentioned above • TRACE: When enabled, each line read from the input file is written to the Progress tab or the user specified output file • ECHO file: Write each input line to the designated file • COM: Comment line that is ignored during input processing • END: End of block structure or end of data input Note that blank lines are ignored during the input file processing eBook for You File Notational Conventions 9 PV SIMULATION SETUP File Notational Conventions • CAPITALS Indicates a keyword that must be specified exactly as shown shown • [ … ] Optional keywords or values A|B S if f th li t t d l d b ti l • A|B S pec if y one f rom th e li s t separa t e d or enc l ose d b y ver ti ca l bars • bsid Bus identifier (number or name depending on which input option is in effect, can be changed by activity OPTN) • ckid One or two character circuit identifier • mcid One or two character machine identifier • file A filename • label A 12-character label identifier eBook for You Subsystem File 10 PV SIMULATION SETUP Subsystem File • In this file we need to s p ecif y the different py subsystems of the working case that we wish to monitor and manipulate • The following structure should be followed: SUBSYSTEM|SYSTEM [label] ( subs y stem s p ecification data record ) (y p ) . . . (subsystem specification data record) END eBook for You [...]... ( (branch specification record) p ) END • In the above structure, the branch specification record may specify sets of tie lines or individual branches, as shown in the previous slide eBook for You • 17 PV SIMULATION SETUP Monitored Element Data File The different structures for voltage monitoring records are shown below Set of buses outside a voltage band (r r define the upper and lower limits of... following window will pop up • Here we can see the results for the base case as well as for the different contingencies ti i eBook for You • 29 PV ANALYSIS IN PSS®E PV Results Select Interface MW flow and choose the contingency you want to see • Double-click on the horizontal scale and change the maximum value to 125MW and set the step value to 25MW • Double-click on the plot to adjust parameters such as... the interface MW flow option shows us how much is the actual flow from the sink to the source with each transfer increment 31 PV ANALYSIS IN PSS®E PV Results Select bus voltage against interface flow • Choose contingency N-2 N2 230kV • Verify the voltage at b 152 t bus • Adjust the scales and plot as desired by double-clicking on the element you wish to modify eBook for You • 32 PV ANALYSIS IN PSS®E . different structures for voltage monitoring records are shown below Set of buses outside a voltage band (r r define the upper and lower limits of the band): [MONITOR] VOLTAGE RANGE |ALL BUSES|. stage: [MONITOR] VOLTAGE LIMIT |ALL BUSES| |AREA i| |KV r| |SUBSYSTEM label| Set of buses having a given voltage drop and rise deviation thresholds (the first r is the value of the voltage drop. takes the contents of a set of linear network analysis data files in preparation for a variety of analyses, including PV and QV analyses • The input required for the process of creating the Distribution