Date: 2022-08-02T03:14:57+00:00

Actual source code: power.c

      1: static char help[] = "This example demonstrates the use of DMNetwork interface for solving a nonlinear electric power grid problem.\n\
      2:                       The available solver options are in the poweroptions file and the data files are in the datafiles directory.\n\
      3:                       See 'Evaluation of overlapping restricted additive schwarz preconditioning for parallel solution \n\
      4:                           of very large power flow problems' https://dl.acm.org/citation.cfm?id=2536784).\n\
      5:                       The data file format used is from the MatPower package (http://www.pserc.cornell.edu//matpower/).\n\
      6:                       Run this program: mpiexec -n <n> ./pf\n\
      7:                       mpiexec -n <n> ./pfc \n";

      9: #include "power.h"
     10: #include <petscdmnetwork.h>

     12: PetscErrorCode FormFunction(SNES snes,Vec X, Vec F,void *appctx)
     13: {
     14:   DM             networkdm;
     15:   UserCtx_Power  *User=(UserCtx_Power*)appctx;
     16:   Vec            localX,localF;
     17:   PetscInt       nv,ne;
     18:   const PetscInt *vtx,*edges;

     20:   SNESGetDM(snes,&networkdm);
     21:   DMGetLocalVector(networkdm,&localX);
     22:   DMGetLocalVector(networkdm,&localF);
     23:   VecSet(F,0.0);
     24:   VecSet(localF,0.0);

     26:   DMGlobalToLocalBegin(networkdm,X,INSERT_VALUES,localX);
     27:   DMGlobalToLocalEnd(networkdm,X,INSERT_VALUES,localX);

     29:   DMNetworkGetSubnetwork(networkdm,0,&nv,&ne,&vtx,&edges);
     30:   FormFunction_Power(networkdm,localX,localF,nv,ne,vtx,edges,User);

     32:   DMRestoreLocalVector(networkdm,&localX);

     34:   DMLocalToGlobalBegin(networkdm,localF,ADD_VALUES,F);
     35:   DMLocalToGlobalEnd(networkdm,localF,ADD_VALUES,F);
     36:   DMRestoreLocalVector(networkdm,&localF);
     37:   return 0;
     38: }

     40: PetscErrorCode SetInitialValues(DM networkdm,Vec X,void* appctx)
     41: {
     42:   PetscInt       vStart,vEnd,nv,ne;
     43:   const PetscInt *vtx,*edges;
     44:   Vec            localX;
     45:   UserCtx_Power  *user_power=(UserCtx_Power*)appctx;

     47:   DMNetworkGetVertexRange(networkdm,&vStart, &vEnd);

     49:   DMGetLocalVector(networkdm,&localX);

     51:   VecSet(X,0.0);
     52:   DMGlobalToLocalBegin(networkdm,X,INSERT_VALUES,localX);
     53:   DMGlobalToLocalEnd(networkdm,X,INSERT_VALUES,localX);

     55:   DMNetworkGetSubnetwork(networkdm,0,&nv,&ne,&vtx,&edges);
     56:   SetInitialGuess_Power(networkdm,localX,nv,ne,vtx,edges,user_power);

     58:   DMLocalToGlobalBegin(networkdm,localX,ADD_VALUES,X);
     59:   DMLocalToGlobalEnd(networkdm,localX,ADD_VALUES,X);
     60:   DMRestoreLocalVector(networkdm,&localX);
     61:   return 0;
     62: }

     64: int main(int argc,char ** argv)
     65: {
     66:   char             pfdata_file[PETSC_MAX_PATH_LEN]="case9.m";
     67:   PFDATA           *pfdata;
     68:   PetscInt         numEdges=0;
     69:   PetscInt         *edges = NULL;
     70:   PetscInt         i;
     71:   DM               networkdm;
     72:   UserCtx_Power    User;
     73: #if defined(PETSC_USE_LOG)
     74:   PetscLogStage    stage1,stage2;
     75: #endif
     76:   PetscMPIInt      rank;
     77:   PetscInt         eStart, eEnd, vStart, vEnd,j;
     78:   PetscInt         genj,loadj;
     79:   Vec              X,F;
     80:   Mat              J;
     81:   SNES             snes;

     83:   PetscInitialize(&argc,&argv,"poweroptions",help);
     84:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
     85:   {
     86:     /* introduce the const crank so the clang static analyzer realizes that if it enters any of the if (crank) then it must have entered the first */
     87:     /* this is an experiment to see how the analyzer reacts */
     88:     const PetscMPIInt crank = rank;

     90:     /* Create an empty network object */
     91:     DMNetworkCreate(PETSC_COMM_WORLD,&networkdm);
     92:     /* Register the components in the network */
     93:     DMNetworkRegisterComponent(networkdm,"branchstruct",sizeof(struct _p_EDGE_Power),&User.compkey_branch);
     94:     DMNetworkRegisterComponent(networkdm,"busstruct",sizeof(struct _p_VERTEX_Power),&User.compkey_bus);
     95:     DMNetworkRegisterComponent(networkdm,"genstruct",sizeof(struct _p_GEN),&User.compkey_gen);
     96:     DMNetworkRegisterComponent(networkdm,"loadstruct",sizeof(struct _p_LOAD),&User.compkey_load);

     98:     PetscLogStageRegister("Read Data",&stage1);
     99:     PetscLogStagePush(stage1);
    100:     /* READ THE DATA */
    101:     if (!crank) {
    102:       /*    READ DATA */
    103:       /* Only rank 0 reads the data */
    104:       PetscOptionsGetString(NULL,NULL,"-pfdata",pfdata_file,sizeof(pfdata_file),NULL);
    105:       PetscNew(&pfdata);
    106:       PFReadMatPowerData(pfdata,pfdata_file);
    107:       User.Sbase = pfdata->sbase;

    109:       numEdges = pfdata->nbranch;
    110:       PetscMalloc1(2*numEdges,&edges);
    111:       GetListofEdges_Power(pfdata,edges);
    112:     }

    114:     /* If external option activated. Introduce error in jacobian */
    115:     PetscOptionsHasName(NULL,NULL, "-jac_error", &User.jac_error);

    117:     PetscLogStagePop();
    118:     MPI_Barrier(PETSC_COMM_WORLD);
    119:     PetscLogStageRegister("Create network",&stage2);
    120:     PetscLogStagePush(stage2);
    121:     /* Set number of nodes/edges */
    122:     DMNetworkSetNumSubNetworks(networkdm,PETSC_DECIDE,1);
    123:     DMNetworkAddSubnetwork(networkdm,"",numEdges,edges,NULL);

    125:     /* Set up the network layout */
    126:     DMNetworkLayoutSetUp(networkdm);

    128:     if (!crank) {
    129:       PetscFree(edges);
    130:     }

    132:     /* Add network components only process 0 has any data to add */
    133:     if (!crank) {
    134:       genj=0; loadj=0;
    135:       DMNetworkGetEdgeRange(networkdm,&eStart,&eEnd);
    136:       for (i = eStart; i < eEnd; i++) {
    137:         DMNetworkAddComponent(networkdm,i,User.compkey_branch,&pfdata->branch[i-eStart],0);
    138:       }
    139:       DMNetworkGetVertexRange(networkdm,&vStart,&vEnd);
    140:       for (i = vStart; i < vEnd; i++) {
    141:         DMNetworkAddComponent(networkdm,i,User.compkey_bus,&pfdata->bus[i-vStart],2);
    142:         if (pfdata->bus[i-vStart].ngen) {
    143:           for (j = 0; j < pfdata->bus[i-vStart].ngen; j++) {
    144:             DMNetworkAddComponent(networkdm,i,User.compkey_gen,&pfdata->gen[genj++],0);
    145:           }
    146:         }
    147:         if (pfdata->bus[i-vStart].nload) {
    148:           for (j=0; j < pfdata->bus[i-vStart].nload; j++) {
    149:             DMNetworkAddComponent(networkdm,i,User.compkey_load,&pfdata->load[loadj++],0);
    150:           }
    151:         }
    152:       }
    153:     }

    155:     /* Set up DM for use */
    156:     DMSetUp(networkdm);

    158:     if (!crank) {
    159:       PetscFree(pfdata->bus);
    160:       PetscFree(pfdata->gen);
    161:       PetscFree(pfdata->branch);
    162:       PetscFree(pfdata->load);
    163:       PetscFree(pfdata);
    164:     }

    166:     /* Distribute networkdm to multiple processes */
    167:     DMNetworkDistribute(&networkdm,0);

    169:     PetscLogStagePop();
    170:     DMNetworkGetEdgeRange(networkdm,&eStart,&eEnd);
    171:     DMNetworkGetVertexRange(networkdm,&vStart,&vEnd);

    173: #if 0
    174:     EDGE_Power     edge;
    175:     PetscInt       key,kk,numComponents;
    176:     VERTEX_Power   bus;
    177:     GEN            gen;
    178:     LOAD           load;

    180:     for (i = eStart; i < eEnd; i++) {
    181:       DMNetworkGetComponent(networkdm,i,0,&key,(void**)&edge);
    182:       DMNetworkGetNumComponents(networkdm,i,&numComponents);
    183:       PetscPrintf(PETSC_COMM_SELF,"Rank %d ncomps = %d Line %d ---- %d\n",crank,numComponents,edge->internal_i,edge->internal_j);
    184:     }

    186:     for (i = vStart; i < vEnd; i++) {
    187:       DMNetworkGetNumComponents(networkdm,i,&numComponents);
    188:       for (kk=0; kk < numComponents; kk++) {
    189:         DMNetworkGetComponent(networkdm,i,kk,&key,&component);
    190:         if (key == 1) {
    191:           bus = (VERTEX_Power)(component);
    192:           PetscPrintf(PETSC_COMM_SELF,"Rank %d ncomps = %d Bus %d\n",crank,numComponents,bus->internal_i);
    193:         } else if (key == 2) {
    194:           gen = (GEN)(component);
    195:           PetscPrintf(PETSC_COMM_SELF,"Rank %d Gen pg = %f qg = %f\n",crank,gen->pg,gen->qg);
    196:         } else if (key == 3) {
    197:           load = (LOAD)(component);
    198:           PetscPrintf(PETSC_COMM_SELF,"Rank %d Load pl = %f ql = %f\n",crank,load->pl,load->ql);
    199:         }
    200:       }
    201:     }
    202: #endif
    203:     /* Broadcast Sbase to all processors */
    204:     MPI_Bcast(&User.Sbase,1,MPIU_SCALAR,0,PETSC_COMM_WORLD);

    206:     DMCreateGlobalVector(networkdm,&X);
    207:     VecDuplicate(X,&F);

    209:     DMCreateMatrix(networkdm,&J);
    210:     MatSetOption(J,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_FALSE);

    212:     SetInitialValues(networkdm,X,&User);

    214:     /* HOOK UP SOLVER */
    215:     SNESCreate(PETSC_COMM_WORLD,&snes);
    216:     SNESSetDM(snes,networkdm);
    217:     SNESSetFunction(snes,F,FormFunction,&User);
    218:     SNESSetJacobian(snes,J,J,FormJacobian_Power,&User);
    219:     SNESSetFromOptions(snes);

    221:     SNESSolve(snes,NULL,X);
    222:     /* VecView(X,PETSC_VIEWER_STDOUT_WORLD); */

    224:     VecDestroy(&X);
    225:     VecDestroy(&F);
    226:     MatDestroy(&J);

    228:     SNESDestroy(&snes);
    229:     DMDestroy(&networkdm);
    230:   }
    231:   PetscFinalize();
    232:   return 0;
    233: }

    235: /*TEST

    237:    build:
    238:      depends: PFReadData.c pffunctions.c
    239:      requires: !complex double defined(PETSC_HAVE_ATTRIBUTEALIGNED)

    241:    test:
    242:      args: -snes_rtol 1.e-3
    243:      localrunfiles: poweroptions case9.m
    244:      output_file: output/power_1.out

    246:    test:
    247:      suffix: 2
    248:      args: -snes_rtol 1.e-3 -petscpartitioner_type simple
    249:      nsize: 4
    250:      localrunfiles: poweroptions case9.m
    251:      output_file: output/power_1.out

    253: TEST*/