v1.1. Released version with about 20~30% performance improvement.

Author: changgang

README.md

@@ -1,7 +1,7 @@
 # Simulation Toolkit for Electrical Power Systems
 - Maintainer: Changgang Li <lichgang@sdu.edu.cn> from School of Electrical Engineering, Shandong University.
 - Documentation: [N/A]
-- Date of Readme: Jan. 20, 2020
+- Date of Readme: March. 8, 2020
 
 ## Major functions
 Simulation Toolkit for Electrical Power Systems (STEPS) is an open source power system simulator designed for balanced large-scale AC-DC hybrid power system analysis.  
@@ -10,8 +10,9 @@ The data format of STEPS is improved based on PSS/E raw and dyr data format. BPA
 You are encourage to join us for further development.
 
 ## Major versions
-1. V0.0: Initialize project on March 21, 2018
-2. V1.0: Improved performance version on Feb. 12, 2020. Support synchronous generator, wind turbine generator, (basic) PV unit, HVDC, static and dynamic loads.
+- v1.1: Improved performance version on March 8, 2020. About 20~30% improvement comparing to v1.0.
+- v1.0: Improved performance version on Feb. 12, 2020. Support synchronous generator, wind turbine generator, (basic) PV unit, HVDC, static and dynamic loads.
+- v0.0: Initialize project on March 21, 2018
 
 ## Dependency
 STEPS depends on CSparse, CXSparse, CppTest, and RapidJSON. The CXSparse is modified to avoid confliction between CSparse and CXSparse by changing prefix cs_ and CS_ to cxs_ and CSX_ .