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: /* T
 10:    Concepts: DMNetwork
 11:    Concepts: PETSc SNES solver
 12: */

 14: #include "power.h"
 15: #include <petscdmnetwork.h>

 17: PetscErrorCode FormFunction(SNES snes,Vec X, Vec F,void *appctx)
 18: {
 19:   DM             networkdm;
 20:   UserCtx_Power  *User=(UserCtx_Power*)appctx;
 21:   Vec            localX,localF;
 22:   PetscInt       nv,ne;
 23:   const PetscInt *vtx,*edges;

 25:   SNESGetDM(snes,&networkdm);
 26:   DMGetLocalVector(networkdm,&localX);
 27:   DMGetLocalVector(networkdm,&localF);
 28:   VecSet(F,0.0);
 29:   VecSet(localF,0.0);

 31:   DMGlobalToLocalBegin(networkdm,X,INSERT_VALUES,localX);
 32:   DMGlobalToLocalEnd(networkdm,X,INSERT_VALUES,localX);

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

 37:   DMRestoreLocalVector(networkdm,&localX);

 39:   DMLocalToGlobalBegin(networkdm,localF,ADD_VALUES,F);
 40:   DMLocalToGlobalEnd(networkdm,localF,ADD_VALUES,F);
 41:   DMRestoreLocalVector(networkdm,&localF);
 42:   return 0;
 43: }

 45: PetscErrorCode SetInitialValues(DM networkdm,Vec X,void* appctx)
 46: {
 47:   PetscInt       vStart,vEnd,nv,ne;
 48:   const PetscInt *vtx,*edges;
 49:   Vec            localX;
 50:   UserCtx_Power  *user_power=(UserCtx_Power*)appctx;

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

 54:   DMGetLocalVector(networkdm,&localX);

 56:   VecSet(X,0.0);
 57:   DMGlobalToLocalBegin(networkdm,X,INSERT_VALUES,localX);
 58:   DMGlobalToLocalEnd(networkdm,X,INSERT_VALUES,localX);

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

 63:   DMLocalToGlobalBegin(networkdm,localX,ADD_VALUES,X);
 64:   DMLocalToGlobalEnd(networkdm,localX,ADD_VALUES,X);
 65:   DMRestoreLocalVector(networkdm,&localX);
 66:   return 0;
 67: }

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

 88:   PetscInitialize(&argc,&argv,"poweroptions",help);
 89:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 90:   {
 91:     /* 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 */
 92:     /* this is an experiment to see how the analyzer reacts */
 93:     const PetscMPIInt crank = rank;

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

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

114:       numEdges = pfdata->nbranch;
115:       PetscMalloc1(2*numEdges,&edges);
116:       GetListofEdges_Power(pfdata,edges);
117:     }

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

122:     PetscLogStagePop();
123:     MPI_Barrier(PETSC_COMM_WORLD);
124:     PetscLogStageRegister("Create network",&stage2);
125:     PetscLogStagePush(stage2);
126:     /* Set number of nodes/edges */
127:     DMNetworkSetNumSubNetworks(networkdm,PETSC_DECIDE,1);
128:     DMNetworkAddSubnetwork(networkdm,"",numEdges,edges,NULL);

130:     /* Set up the network layout */
131:     DMNetworkLayoutSetUp(networkdm);

133:     if (!crank) {
134:       PetscFree(edges);
135:     }

137:     /* Add network components only process 0 has any data to add */
138:     if (!crank) {
139:       genj=0; loadj=0;
140:       DMNetworkGetEdgeRange(networkdm,&eStart,&eEnd);
141:       for (i = eStart; i < eEnd; i++) {
142:         DMNetworkAddComponent(networkdm,i,User.compkey_branch,&pfdata->branch[i-eStart],0);
143:       }
144:       DMNetworkGetVertexRange(networkdm,&vStart,&vEnd);
145:       for (i = vStart; i < vEnd; i++) {
146:         DMNetworkAddComponent(networkdm,i,User.compkey_bus,&pfdata->bus[i-vStart],2);
147:         if (pfdata->bus[i-vStart].ngen) {
148:           for (j = 0; j < pfdata->bus[i-vStart].ngen; j++) {
149:             DMNetworkAddComponent(networkdm,i,User.compkey_gen,&pfdata->gen[genj++],0);
150:           }
151:         }
152:         if (pfdata->bus[i-vStart].nload) {
153:           for (j=0; j < pfdata->bus[i-vStart].nload; j++) {
154:             DMNetworkAddComponent(networkdm,i,User.compkey_load,&pfdata->load[loadj++],0);
155:           }
156:         }
157:       }
158:     }

160:     /* Set up DM for use */
161:     DMSetUp(networkdm);

163:     if (!crank) {
164:       PetscFree(pfdata->bus);
165:       PetscFree(pfdata->gen);
166:       PetscFree(pfdata->branch);
167:       PetscFree(pfdata->load);
168:       PetscFree(pfdata);
169:     }

171:     /* Distribute networkdm to multiple processes */
172:     DMNetworkDistribute(&networkdm,0);

174:     PetscLogStagePop();
175:     DMNetworkGetEdgeRange(networkdm,&eStart,&eEnd);
176:     DMNetworkGetVertexRange(networkdm,&vStart,&vEnd);

178: #if 0
179:     EDGE_Power     edge;
180:     PetscInt       key,kk,numComponents;
181:     VERTEX_Power   bus;
182:     GEN            gen;
183:     LOAD           load;

185:     for (i = eStart; i < eEnd; i++) {
186:       DMNetworkGetComponent(networkdm,i,0,&key,(void**)&edge);
187:       DMNetworkGetNumComponents(networkdm,i,&numComponents);
188:       PetscPrintf(PETSC_COMM_SELF,"Rank %d ncomps = %d Line %d ---- %d\n",crank,numComponents,edge->internal_i,edge->internal_j);
189:     }

191:     for (i = vStart; i < vEnd; i++) {
192:       DMNetworkGetNumComponents(networkdm,i,&numComponents);
193:       for (kk=0; kk < numComponents; kk++) {
194:         DMNetworkGetComponent(networkdm,i,kk,&key,&component);
195:         if (key == 1) {
196:           bus = (VERTEX_Power)(component);
197:           PetscPrintf(PETSC_COMM_SELF,"Rank %d ncomps = %d Bus %d\n",crank,numComponents,bus->internal_i);
198:         } else if (key == 2) {
199:           gen = (GEN)(component);
200:           PetscPrintf(PETSC_COMM_SELF,"Rank %d Gen pg = %f qg = %f\n",crank,gen->pg,gen->qg);
201:         } else if (key == 3) {
202:           load = (LOAD)(component);
203:           PetscPrintf(PETSC_COMM_SELF,"Rank %d Load pl = %f ql = %f\n",crank,load->pl,load->ql);
204:         }
205:       }
206:     }
207: #endif
208:     /* Broadcast Sbase to all processors */
209:     MPI_Bcast(&User.Sbase,1,MPIU_SCALAR,0,PETSC_COMM_WORLD);

211:     DMCreateGlobalVector(networkdm,&X);
212:     VecDuplicate(X,&F);

214:     DMCreateMatrix(networkdm,&J);
215:     MatSetOption(J,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_FALSE);

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

219:     /* HOOK UP SOLVER */
220:     SNESCreate(PETSC_COMM_WORLD,&snes);
221:     SNESSetDM(snes,networkdm);
222:     SNESSetFunction(snes,F,FormFunction,&User);
223:     SNESSetJacobian(snes,J,J,FormJacobian_Power,&User);
224:     SNESSetFromOptions(snes);

226:     SNESSolve(snes,NULL,X);
227:     /* VecView(X,PETSC_VIEWER_STDOUT_WORLD); */

229:     VecDestroy(&X);
230:     VecDestroy(&F);
231:     MatDestroy(&J);

233:     SNESDestroy(&snes);
234:     DMDestroy(&networkdm);
235:   }
236:   PetscFinalize();
237:   return 0;
238: }

240: /*TEST

242:    build:
243:      depends: PFReadData.c pffunctions.c
244:      requires: !complex double defined(PETSC_HAVE_ATTRIBUTEALIGNED)

246:    test:
247:      args: -snes_rtol 1.e-3
248:      localrunfiles: poweroptions case9.m
249:      output_file: output/power_1.out

251:    test:
252:      suffix: 2
253:      args: -snes_rtol 1.e-3 -petscpartitioner_type simple
254:      nsize: 4
255:      localrunfiles: poweroptions case9.m
256:      output_file: output/power_1.out

258: TEST*/