diff --git a/src/main/java/com/interplug/qcast/biz/pwrGnrSimulation/PwrGnrSimService.java b/src/main/java/com/interplug/qcast/biz/pwrGnrSimulation/PwrGnrSimService.java
index 3c1a1cca..f3829942 100644
--- a/src/main/java/com/interplug/qcast/biz/pwrGnrSimulation/PwrGnrSimService.java
+++ b/src/main/java/com/interplug/qcast/biz/pwrGnrSimulation/PwrGnrSimService.java
@@ -415,10 +415,19 @@ public class PwrGnrSimService {
 
        // PCS1, pcs2, pcs3 선택 정보
        double pcs1_henkankouritsu = pwrGnrSimReq.getPcsCnvEff1() / 100; // 변환 효율
+      if(pcs1_henkankouritsu == 0){
+          pcs1_henkankouritsu = 1;
+      }
        double pcs1_youryou = pwrGnrSimReq.getPcsSpecification1(); // 용량 (예시 4.4)
        double pcs2_henkankouritsu = (pwrGnrSimReq.getPcsCnvEff2() / 100);
+       if(pcs2_henkankouritsu == 0){
+           pcs2_henkankouritsu = 1;
+       }
        double pcs2_youryou = pwrGnrSimReq.getPcsSpecification2();
        double pcs3_henkankouritsu = pwrGnrSimReq.getPcsCnvEff3() / 100;
+       if(pcs3_henkankouritsu == 0){
+           pcs3_henkankouritsu = 1;
+       }
        double pcs3_youryou = pwrGnrSimReq.getPcsSpecification3();
 
        double pcs_amp1 = pwrGnrSimReq.getPcsAmp1();